diff --git a/jooby-assets-j2v8/src/main/java/org/jooby/assets/V8Context.java b/jooby-assets-j2v8/src/main/java/org/jooby/assets/V8Context.java
index b0f4a656c5..0a8eeab707 100644
--- a/jooby-assets-j2v8/src/main/java/org/jooby/assets/V8Context.java
+++ b/jooby-assets-j2v8/src/main/java/org/jooby/assets/V8Context.java
@@ -80,6 +80,10 @@ public V8Object hash() {
     return register(new V8Object(v8));
   }
 
+  public V8Function function(final JavaCallback callback) {
+    return register(new V8Function(v8, callback));
+  }
+
   public V8Object hash(final Map<String, Object> hash) {
     return register(V8ObjectUtils.toV8Object(v8, hash));
   }
diff --git a/jooby-assets-rollup/src/main/java/org/jooby/assets/Rollup.java b/jooby-assets-rollup/src/main/java/org/jooby/assets/Rollup.java
index 5990d952ff..672c5abc92 100644
--- a/jooby-assets-rollup/src/main/java/org/jooby/assets/Rollup.java
+++ b/jooby-assets-rollup/src/main/java/org/jooby/assets/Rollup.java
@@ -18,8 +18,18 @@
  */
 package org.jooby.assets;
 
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.PathMatcher;
+import java.nio.file.Paths;
+import java.util.Optional;
+
 import org.jooby.MediaType;
 
+import com.eclipsesource.v8.V8;
+import com.eclipsesource.v8.V8Array;
+import com.eclipsesource.v8.V8Object;
+import com.eclipsesource.v8.utils.V8ObjectUtils;
 import com.typesafe.config.Config;
 
 /**
@@ -38,39 +48,98 @@
  *
  *   pipeline {
  *     ...
+ *     dev: [rollup]
  *     dist: [rollup]
  *   }
  * }
  * </pre>
  *
  * <h2>options</h2>
+ * <h3>generate</h3>
  * <pre>
- * assets {
- *   fileset {
- *     home: ...
+ *   rollup {
+ *     genereate {
+ *       format: es
+ *     }
  *   }
+ * </pre>
  *
- *   pipeline {
- *     ...
- *     dist: [rollmap]
+ * <p>
+ * See
+ * <a href="https://github.com/rollup/rollup/wiki/JavaScript-API#bundlegenerate-options-">generate
+ * options</a>.
+ * </p>
+ *
+ * <h3>plugins</h3>
+ *
+ * <h4>babel</h4>
+ *
+ * <pre>
+ *   rollup {
+ *     plugins {
+ *       babel {
+ *         presets: [[es2015, {modules: false}]]
+ *       }
+ *     }
+ *   }
+ * </pre>
+ *
+ * <p>
+ * See <a href="https://babeljs.io/">https://babeljs.io</a> for more options.
+ * </p>
+ *
+ * <h4>legacy</h4>
+ * <p>
+ * This plugins add a <code>export default</code> line to legacy modules:
+ * </p>
+ *
+ * <pre>
+ *   rollup {
+ *     plugins {
+ *       legacy {
+ *         "/js/lib/react.js": React
+ *       }
+ *     }
  *   }
+ * </pre>
  *
+ * <h4>alias</h4>
+ * <p>
+ * Set an alias to a common (probably long) path.
+ * </p>
+ *
+ * <pre>
  *   rollup {
- *     output {
- *       format: amd
+ *     plugins {
+ *       alias {
+ *         "/js/lib/react.js": "react"
+ *       }
  *     }
  *   }
- * }
  * </pre>
+ *
+ * <p>
+ * Instead of:
+ * </p>
+ * <pre>
+ * import React from 'js/lib/react.js';
+ * </pre>
+ *
  * <p>
- * See: <a href="https://github.com/rollup/rollup/wiki/JavaScript-API">rollup.js options</a>.
+ * Now, you can import a module like:
  * </p>
+ * <pre>
+ * import React from 'react';
+ * </pre>
  *
  * @author edgar
  * @since 0.12.0
  */
 public class Rollup extends AssetProcessor {
 
+  static final PathMatcher TRUE = p -> true;
+  static final PathMatcher FALSE = p -> false;
+
   @Override
   public boolean matches(final MediaType type) {
     return MediaType.js.matches(type);
@@ -79,9 +148,40 @@ public boolean matches(final MediaType type) {
   @Override
   public String process(final String filename, final String source, final Config conf)
       throws Exception {
-    return V8Context.run("window", v8 -> {
-      return v8.invoke("rollup.js", source, options(), filename);
+    return V8Context.run("window", ctx -> {
+      V8 v8 = ctx.v8;
+
+      V8Object j2v8 = ctx.hash();
+      j2v8.add("createFilter", ctx.function((receiver, args) -> {
+        PathMatcher includes = at(args, 0)
+            .map(it -> FileSystems.getDefault().getPathMatcher("glob:" + it))
+            .orElse(TRUE);
+        PathMatcher excludes = at(args, 1)
+            .map(it -> FileSystems.getDefault().getPathMatcher("glob:" + it))
+            .orElse(FALSE);
+
+        return ctx.function((self, arguments) -> {
+          Path path = Paths.get(arguments.get(0).toString());
+          if (includes.matches(path)) {
+            return !excludes.matches(path);
+          }
+          return false;
+        });
+      }));
+
+      v8.add("j2v8", j2v8);
+      return ctx.invoke("rollup.js", source, options(), filename);
     });
   }
 
+  private Optional<Object> at(final V8Array args, final int i) {
+    if (i < args.length()) {
+      Object value = V8ObjectUtils.getValue(args, i);
+      if (value == V8.getUndefined()) {
+        return Optional.empty();
+      }
+      return Optional.ofNullable(value);
+    }
+    return Optional.empty();
+  }
 }
diff --git a/jooby-assets-rollup/src/main/resources/lib/babel-6.24.0.min.js b/jooby-assets-rollup/src/main/resources/lib/babel-6.24.0.min.js
new file mode 100644
index 0000000000..28545d366e
--- /dev/null
+++ b/jooby-assets-rollup/src/main/resources/lib/babel-6.24.0.min.js
@@ -0,0 +1,25 @@
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.Babel=t():e.Babel=t()}(this,function(){return function(e){function t(n){if(r[n])return r[n].exports;var i=r[n]={exports:{},id:n,loaded:!1};return e[n].call(i.exports,i,i.exports,t),i.loaded=!0,i.exports}var r={};return t.m=e,t.c=r,t.p="",t(0)}(function(e){for(var t in e)if(Object.prototype.hasOwnProperty.call(e,t))switch(typeof e[t]){case"function":break;case"object":e[t]=function(t){var r=t.slice(1),n=e[t[0]];return function(e,t,i){n.apply(this,[e,t,i].concat(r))}}(e[t]);break;default:e[t]=e[e[t]]}return e}([function(e,t,r){"use strict";function n(e,t){return y(t)&&"string"==typeof t[0]?e.hasOwnProperty(t[0])?[e[t[0]]].concat(t.slice(1)):void 0:"string"==typeof t?e[t]:t}function i(e){var t=(e.presets||[]).map(function(e){var t=n(b,e);if(!t)throw new Error('Invalid preset specified in Babel options: "'+e+'"');return 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r=e.value,i=n.memberExpression(t,e.key,e.computed);n.isPattern(r)?this.push(r,i):this.nodes.push(this.buildVariableAssignment(r,i))},e.prototype.pushObjectPattern=function(e,t){if(e.properties.length||this.nodes.push(n.expressionStatement(n.callExpression(this.file.addHelper("objectDestructuringEmpty"),[t]))),e.properties.length>1&&!this.scope.isStatic(t)){var r=this.scope.generateUidIdentifierBasedOnNode(t);this.nodes.push(this.buildVariableDeclaration(r,t)),t=r}for(var i=0;i<e.properties.length;i++){var s=e.properties[i];n.isRestProperty(s)?this.pushObjectRest(e,t,s,i):this.pushObjectProperty(s,t)}},e.prototype.canUnpackArrayPattern=function(e,t){if(!n.isArrayExpression(t))return!1;if(!(e.elements.length>t.elements.length)){if(e.elements.length<t.elements.length&&!r(e))return!1;for(var s=e.elements,a=Array.isArray(s),u=0,s=a?s:(0,o.default)(s);;){var l;if(a){if(u>=s.length)break;l=s[u++]}else{if(u=s.next(),u.done)break;l=u.value}var 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t=e===R._if||e===R._for||e===R._with||e===R._while;this.state.context.push(t?U.parenStatement:U.parenExpression),this.state.exprAllowed=!0},R.incDec.updateContext=function(){},R._function.updateContext=function(){this.curContext()!==U.braceStatement&&this.state.context.push(U.functionExpression),this.state.exprAllowed=!1},R.backQuote.updateContext=function(){this.curContext()===U.template?this.state.context.pop():this.state.context.push(U.template),this.state.exprAllowed=!1};var V=function e(t,r){w(this,e),this.line=t,this.column=r},G=function e(t,r){w(this,e),this.start=t,this.end=r},W=function(){function e(){w(this,e)}return e.prototype.init=function(e,t){return this.strict=e.strictMode!==!1&&"module"===e.sourceType,this.input=t,this.potentialArrowAt=-1,this.inMethod=this.inFunction=this.inGenerator=this.inAsync=this.inPropertyName=this.inType=this.noAnonFunctionType=!1,this.labels=[],this.decorators=[],this.tokens=[],this.comments=[],this.trailingComments=[],this.leadingComments=[],this.commentStack=[],this.pos=this.lineStart=0,this.curLine=e.startLine,this.type=R.eof,this.value=null,this.start=this.end=this.pos,this.startLoc=this.endLoc=this.curPosition(),this.lastTokEndLoc=this.lastTokStartLoc=null,this.lastTokStart=this.lastTokEnd=this.pos,this.context=[U.braceStatement],this.exprAllowed=!0,this.containsEsc=this.containsOctal=!1,this.octalPosition=null,this.exportedIdentifiers=[],this},e.prototype.curPosition=function(){return new V(this.curLine,this.pos-this.lineStart)},e.prototype.clone=function(t){var r=new e;for(var n in this){var i=this[n];t&&"context"!==n||!Array.isArray(i)||(i=i.slice()),r[n]=i}return r},e}(),Y=function e(t){w(this,e),this.type=t.type,this.value=t.value,this.start=t.start,this.end=t.end,this.loc=new G(t.startLoc,t.endLoc)},q=function(){function e(t,r){w(this,e),this.state=new W,this.state.init(t,r)}return e.prototype.next=function(){this.isLookahead||this.state.tokens.push(new Y(this.state)),this.state.lastTokEnd=this.state.end,this.state.lastTokStart=this.state.start,this.state.lastTokEndLoc=this.state.endLoc,this.state.lastTokStartLoc=this.state.startLoc,this.nextToken()},e.prototype.eat=function(e){return!!this.match(e)&&(this.next(),!0)},e.prototype.match=function(e){return this.state.type===e},e.prototype.isKeyword=function(e){return g(e)},e.prototype.lookahead=function(){var e=this.state;this.state=e.clone(!0),this.isLookahead=!0,this.next(),this.isLookahead=!1;var t=this.state.clone(!0);return this.state=e,t},e.prototype.setStrict=function(e){if(this.state.strict=e,this.match(R.num)||this.match(R.string)){for(this.state.pos=this.state.start;this.state.pos<this.state.lineStart;)this.state.lineStart=this.input.lastIndexOf("\n",this.state.lineStart-2)+1,--this.state.curLine;this.nextToken()}},e.prototype.curContext=function(){return this.state.context[this.state.context.length-1]},e.prototype.nextToken=function(){var e=this.curContext();return e&&e.preserveSpace||this.skipSpace(),this.state.containsOctal=!1,this.state.octalPosition=null,this.state.start=this.state.pos,this.state.startLoc=this.state.curPosition(),this.state.pos>=this.input.length?this.finishToken(R.eof):e.override?e.override(this):this.readToken(this.fullCharCodeAtPos())},e.prototype.readToken=function(e){return i(e)||92===e?this.readWord():this.getTokenFromCode(e)},e.prototype.fullCharCodeAtPos=function(){var e=this.input.charCodeAt(this.state.pos);return e<=55295||e>=57344?e:(e<<10)+this.input.charCodeAt(this.state.pos+1)-56613888},e.prototype.pushComment=function(e,t,r,n,i,s){var a={type:e?"CommentBlock":"CommentLine",value:t,start:r,end:n,loc:new G(i,s)};this.isLookahead||(this.state.tokens.push(a),this.state.comments.push(a),this.addComment(a))},e.prototype.skipBlockComment=function(){var e=this.state.curPosition(),t=this.state.pos,r=this.input.indexOf("*/",this.state.pos+=2);r===-1&&this.raise(this.state.pos-2,"Unterminated comment"),this.state.pos=r+2,N.lastIndex=t;for(var n=void 0;(n=N.exec(this.input))&&n.index<this.state.pos;)++this.state.curLine,this.state.lineStart=n.index+n[0].length;this.pushComment(!0,this.input.slice(t+2,r),t,this.state.pos,e,this.state.curPosition())},e.prototype.skipLineComment=function(e){for(var t=this.state.pos,r=this.state.curPosition(),n=this.input.charCodeAt(this.state.pos+=e);this.state.pos<this.input.length&&10!==n&&13!==n&&8232!==n&&8233!==n;)++this.state.pos,n=this.input.charCodeAt(this.state.pos);this.pushComment(!1,this.input.slice(t+e,this.state.pos),t,this.state.pos,r,this.state.curPosition())},e.prototype.skipSpace=function(){e:for(;this.state.pos<this.input.length;){var e=this.input.charCodeAt(this.state.pos);switch(e){case 32:case 160:++this.state.pos;break;case 13:10===this.input.charCodeAt(this.state.pos+1)&&++this.state.pos;case 10:case 8232:case 8233:++this.state.pos,++this.state.curLine,this.state.lineStart=this.state.pos;break;case 47:switch(this.input.charCodeAt(this.state.pos+1)){case 42:this.skipBlockComment();break;case 47:this.skipLineComment(2);break;default:break e}break;default:if(!(e>8&&e<14||e>=5760&&L.test(String.fromCharCode(e))))break e;++this.state.pos}}},e.prototype.finishToken=function(e,t){this.state.end=this.state.pos,this.state.endLoc=this.state.curPosition();var r=this.state.type;this.state.type=e,this.state.value=t,this.updateContext(r)},e.prototype.readToken_dot=function(){var e=this.input.charCodeAt(this.state.pos+1);if(e>=48&&e<=57)return this.readNumber(!0);var t=this.input.charCodeAt(this.state.pos+2);return 46===e&&46===t?(this.state.pos+=3,this.finishToken(R.ellipsis)):(++this.state.pos,this.finishToken(R.dot))},e.prototype.readToken_slash=function(){return this.state.exprAllowed?(++this.state.pos,this.readRegexp()):61===this.input.charCodeAt(this.state.pos+1)?this.finishOp(R.assign,2):this.finishOp(R.slash,1)},e.prototype.readToken_mult_modulo=function(e){var t=42===e?R.star:R.modulo,r=1,n=this.input.charCodeAt(this.state.pos+1);return 42===n&&(r++,n=this.input.charCodeAt(this.state.pos+2),t=R.exponent),61===n&&(r++,t=R.assign),this.finishOp(t,r)},e.prototype.readToken_pipe_amp=function(e){var t=this.input.charCodeAt(this.state.pos+1);return t===e?this.finishOp(124===e?R.logicalOR:R.logicalAND,2):61===t?this.finishOp(R.assign,2):124===e&&125===t&&this.hasPlugin("flow")?this.finishOp(R.braceBarR,2):this.finishOp(124===e?R.bitwiseOR:R.bitwiseAND,1)},e.prototype.readToken_caret=function(){return 61===this.input.charCodeAt(this.state.pos+1)?this.finishOp(R.assign,2):this.finishOp(R.bitwiseXOR,1)},e.prototype.readToken_plus_min=function(e){var t=this.input.charCodeAt(this.state.pos+1);return t===e?45===t&&62===this.input.charCodeAt(this.state.pos+2)&&M.test(this.input.slice(this.state.lastTokEnd,this.state.pos))?(this.skipLineComment(3),this.skipSpace(),this.nextToken()):this.finishOp(R.incDec,2):61===t?this.finishOp(R.assign,2):this.finishOp(R.plusMin,1)},e.prototype.readToken_lt_gt=function(e){var t=this.input.charCodeAt(this.state.pos+1),r=1;return t===e?(r=62===e&&62===this.input.charCodeAt(this.state.pos+2)?3:2,61===this.input.charCodeAt(this.state.pos+r)?this.finishOp(R.assign,r+1):this.finishOp(R.bitShift,r)):33===t&&60===e&&45===this.input.charCodeAt(this.state.pos+2)&&45===this.input.charCodeAt(this.state.pos+3)?(this.inModule&&this.unexpected(),this.skipLineComment(4),this.skipSpace(),this.nextToken()):(61===t&&(r=2),this.finishOp(R.relational,r))},e.prototype.readToken_eq_excl=function(e){var t=this.input.charCodeAt(this.state.pos+1);return 61===t?this.finishOp(R.equality,61===this.input.charCodeAt(this.state.pos+2)?3:2):61===e&&62===t?(this.state.pos+=2,this.finishToken(R.arrow)):this.finishOp(61===e?R.eq:R.prefix,1)},e.prototype.getTokenFromCode=function(e){switch(e){case 46:return this.readToken_dot();case 40:return++this.state.pos,this.finishToken(R.parenL);case 41:return++this.state.pos,this.finishToken(R.parenR);case 59:return++this.state.pos,this.finishToken(R.semi);case 44:return++this.state.pos,this.finishToken(R.comma);case 91:return++this.state.pos,this.finishToken(R.bracketL);case 93:return++this.state.pos,this.finishToken(R.bracketR);case 123:return this.hasPlugin("flow")&&124===this.input.charCodeAt(this.state.pos+1)?this.finishOp(R.braceBarL,2):(++this.state.pos,this.finishToken(R.braceL));case 125:return++this.state.pos,this.finishToken(R.braceR);case 58:return this.hasPlugin("functionBind")&&58===this.input.charCodeAt(this.state.pos+1)?this.finishOp(R.doubleColon,2):(++this.state.pos,this.finishToken(R.colon));case 63:return++this.state.pos,this.finishToken(R.question);case 64:return++this.state.pos,this.finishToken(R.at);case 96:return++this.state.pos,this.finishToken(R.backQuote);case 48:var t=this.input.charCodeAt(this.state.pos+1);if(120===t||88===t)return this.readRadixNumber(16);if(111===t||79===t)return this.readRadixNumber(8);if(98===t||66===t)return this.readRadixNumber(2);case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.readNumber(!1);case 34:case 39:return this.readString(e);case 47:return this.readToken_slash();case 37:case 42:return this.readToken_mult_modulo(e);case 124:case 38:return this.readToken_pipe_amp(e);case 94:return this.readToken_caret();case 43:case 45:return this.readToken_plus_min(e);case 60:case 62:return this.readToken_lt_gt(e);case 61:case 33:return this.readToken_eq_excl(e);case 126:return this.finishOp(R.prefix,1)}this.raise(this.state.pos,"Unexpected character '"+l(e)+"'")},e.prototype.finishOp=function(e,t){var r=this.input.slice(this.state.pos,this.state.pos+t);return this.state.pos+=t,this.finishToken(e,r)},e.prototype.readRegexp=function(){for(var e=this.state.pos,t=void 0,r=void 0;;){this.state.pos>=this.input.length&&this.raise(e,"Unterminated regular expression");var n=this.input.charAt(this.state.pos);if(M.test(n)&&this.raise(e,"Unterminated regular expression"),t)t=!1;else{if("["===n)r=!0;else if("]"===n&&r)r=!1;else if("/"===n&&!r)break;t="\\"===n}++this.state.pos}var i=this.input.slice(e,this.state.pos);++this.state.pos;var s=this.readWord1();if(s){/^[gmsiyu]*$/.test(s)||this.raise(e,"Invalid regular expression flag")}return this.finishToken(R.regexp,{pattern:i,flags:s})},e.prototype.readInt=function(e,t){for(var r=this.state.pos,n=0,i=0,s=null==t?1/0:t;i<s;++i){var a=this.input.charCodeAt(this.state.pos),o=void 0;if((o=a>=97?a-97+10:a>=65?a-65+10:a>=48&&a<=57?a-48:1/0)>=e)break;++this.state.pos,n=n*e+o}return this.state.pos===r||null!=t&&this.state.pos-r!==t?null:n},e.prototype.readRadixNumber=function(e){this.state.pos+=2;var t=this.readInt(e);return null==t&&this.raise(this.state.start+2,"Expected number in radix "+e),i(this.fullCharCodeAtPos())&&this.raise(this.state.pos,"Identifier directly after number"),this.finishToken(R.num,t)},e.prototype.readNumber=function(e){var t=this.state.pos,r=48===this.input.charCodeAt(this.state.pos),n=!1;e||null!==this.readInt(10)||this.raise(t,"Invalid number");var s=this.input.charCodeAt(this.state.pos);46===s&&(++this.state.pos,this.readInt(10),n=!0,s=this.input.charCodeAt(this.state.pos)),69!==s&&101!==s||(s=this.input.charCodeAt(++this.state.pos),43!==s&&45!==s||++this.state.pos,null===this.readInt(10)&&this.raise(t,"Invalid number"),n=!0),i(this.fullCharCodeAtPos())&&this.raise(this.state.pos,"Identifier directly after number");var a=this.input.slice(t,this.state.pos),o=void 0;return n?o=parseFloat(a):r&&1!==a.length?/[89]/.test(a)||this.state.strict?this.raise(t,"Invalid number"):o=parseInt(a,8):o=parseInt(a,10),this.finishToken(R.num,o)},e.prototype.readCodePoint=function(){var e=this.input.charCodeAt(this.state.pos),t=void 0;if(123===e){var r=++this.state.pos;t=this.readHexChar(this.input.indexOf("}",this.state.pos)-this.state.pos),++this.state.pos,t>1114111&&this.raise(r,"Code point out of bounds")}else t=this.readHexChar(4);return t},e.prototype.readString=function(e){for(var t="",r=++this.state.pos;;){this.state.pos>=this.input.length&&this.raise(this.state.start,"Unterminated string constant");var n=this.input.charCodeAt(this.state.pos);if(n===e)break;92===n?(t+=this.input.slice(r,this.state.pos),t+=this.readEscapedChar(!1),r=this.state.pos):(o(n)&&this.raise(this.state.start,"Unterminated string constant"),++this.state.pos)}return t+=this.input.slice(r,this.state.pos++),this.finishToken(R.string,t)},e.prototype.readTmplToken=function(){for(var e="",t=this.state.pos;;){this.state.pos>=this.input.length&&this.raise(this.state.start,"Unterminated template");var r=this.input.charCodeAt(this.state.pos);if(96===r||36===r&&123===this.input.charCodeAt(this.state.pos+1))return this.state.pos===this.state.start&&this.match(R.template)?36===r?(this.state.pos+=2,this.finishToken(R.dollarBraceL)):(++this.state.pos,this.finishToken(R.backQuote)):(e+=this.input.slice(t,this.state.pos),this.finishToken(R.template,e));if(92===r)e+=this.input.slice(t,this.state.pos),e+=this.readEscapedChar(!0),t=this.state.pos;else if(o(r)){switch(e+=this.input.slice(t,this.state.pos),++this.state.pos,r){case 13:10===this.input.charCodeAt(this.state.pos)&&++this.state.pos;case 10:e+="\n";break;default:e+=String.fromCharCode(r)}++this.state.curLine,this.state.lineStart=this.state.pos,t=this.state.pos}else++this.state.pos}},e.prototype.readEscapedChar=function(e){var t=this.input.charCodeAt(++this.state.pos);switch(++this.state.pos,t){case 110:return"\n";case 114:return"\r";case 120:return String.fromCharCode(this.readHexChar(2));case 117:return l(this.readCodePoint());case 116:return"\t";case 98:return"\b";case 118:return"\v";case 102:return"\f";case 13:10===this.input.charCodeAt(this.state.pos)&&++this.state.pos;case 10:return this.state.lineStart=this.state.pos,++this.state.curLine,"";default:if(t>=48&&t<=55){var r=this.input.substr(this.state.pos-1,3).match(/^[0-7]+/)[0],n=parseInt(r,8);return n>255&&(r=r.slice(0,-1),n=parseInt(r,8)),n>0&&(this.state.containsOctal||(this.state.containsOctal=!0,this.state.octalPosition=this.state.pos-2),(this.state.strict||e)&&this.raise(this.state.pos-2,"Octal literal in strict mode")),this.state.pos+=r.length-1,String.fromCharCode(n)}return String.fromCharCode(t)}},e.prototype.readHexChar=function(e){var t=this.state.pos,r=this.readInt(16,e);return null===r&&this.raise(t,"Bad character escape sequence"),r},e.prototype.readWord1=function(){this.state.containsEsc=!1;for(var e="",t=!0,r=this.state.pos;this.state.pos<this.input.length;){var n=this.fullCharCodeAtPos();if(s(n))this.state.pos+=n<=65535?1:2;else{if(92!==n)break;this.state.containsEsc=!0,e+=this.input.slice(r,this.state.pos);var a=this.state.pos;117!==this.input.charCodeAt(++this.state.pos)&&this.raise(this.state.pos,"Expecting Unicode escape sequence \\uXXXX"),++this.state.pos
+;var o=this.readCodePoint();(t?i:s)(o,!0)||this.raise(a,"Invalid Unicode escape"),e+=l(o),r=this.state.pos}t=!1}return e+this.input.slice(r,this.state.pos)},e.prototype.readWord=function(){var e=this.readWord1(),t=R.name;return!this.state.containsEsc&&this.isKeyword(e)&&(t=I[e]),this.finishToken(t,e)},e.prototype.braceIsBlock=function(e){if(e===R.colon){var t=this.curContext();if(t===U.braceStatement||t===U.braceExpression)return!t.isExpr}return e===R._return?M.test(this.input.slice(this.state.lastTokEnd,this.state.start)):e===R._else||e===R.semi||e===R.eof||e===R.parenR||(e===R.braceL?this.curContext()===U.braceStatement:!this.state.exprAllowed)},e.prototype.updateContext=function(e){var t=this.state.type,r=void 0;t.keyword&&e===R.dot?this.state.exprAllowed=!1:(r=t.updateContext)?r.call(this,e):this.state.exprAllowed=t.beforeExpr},e}(),K={},H=["jsx","doExpressions","objectRestSpread","decorators","classProperties","exportExtensions","asyncGenerators","functionBind","functionSent","dynamicImport","flow"],J=function(e){function t(r,n){w(this,t),r=a(r);var i=k(this,e.call(this,r,n));return i.options=r,i.inModule="module"===i.options.sourceType,i.input=n,i.plugins=i.loadPlugins(i.options.plugins),i.filename=r.sourceFilename,0===i.state.pos&&"#"===i.input[0]&&"!"===i.input[1]&&i.skipLineComment(2),i}return P(t,e),t.prototype.isReservedWord=function(e){return"await"===e?this.inModule:y[6](e)},t.prototype.hasPlugin=function(e){return!!(this.plugins["*"]&&H.indexOf(e)>-1)||!!this.plugins[e]},t.prototype.extend=function(e,t){this[e]=t(this[e])},t.prototype.loadAllPlugins=function(){var e=this,t=Object.keys(K).filter(function(e){return"flow"!==e&&"estree"!==e});t.push("flow"),t.forEach(function(t){var 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a=e.elements,o=Array.isArray(a),u=0,a=o?a:a[Symbol.iterator]();;){var l;if(o){if(u>=a.length)break;l=a[u++]}else{if(u=a.next(),u.done)break;l=u.value}var c=l;c&&this.checkDeclaration(c)}else"ObjectProperty"===e.type?this.checkDeclaration(e.value):"RestElement"===e.type||"RestProperty"===e.type?this.checkDeclaration(e.argument):"Identifier"===e.type&&this.checkDuplicateExports(e,e.name)},z.checkDuplicateExports=function(e,t){this.state.exportedIdentifiers.indexOf(t)>-1&&this.raiseDuplicateExportError(e,t),this.state.exportedIdentifiers.push(t)},z.raiseDuplicateExportError=function(e,t){this.raise(e.start,"default"===t?"Only one default export allowed per module.":"`"+t+"` has already been exported. 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Use another statement for destructuring after the import."),this.expect(R.comma),this.eat(R.braceR))break;this.parseImportSpecifier(e)}},z.parseImportSpecifier=function(e){var t=this.startNode();t.imported=this.parseIdentifier(!0),this.eatContextual("as")?t.local=this.parseIdentifier():(this.checkReservedWord(t.imported.name,t.start,!0,!0),t.local=t.imported.__clone()),this.checkLVal(t.local,!0,void 0,"import specifier"),e.specifiers.push(this.finishNode(t,"ImportSpecifier"))},z.parseImportSpecifierDefault=function(e,t,r){var n=this.startNodeAt(t,r);return n.local=e,this.checkLVal(n.local,!0,void 0,"default import specifier"),this.finishNode(n,"ImportDefaultSpecifier")};var ee=J.prototype;ee.toAssignable=function(e,t,r){if(e)switch(e.type){case"Identifier":case"ObjectPattern":case"ArrayPattern":case"AssignmentPattern":break;case"ObjectExpression":e.type="ObjectPattern";for(var n=e.properties,i=Array.isArray(n),s=0,n=i?n:n[Symbol.iterator]();;){var a;if(i){if(s>=n.length)break;a=n[s++]}else{if(s=n.next(),s.done)break;a=s.value}var o=a;"ObjectMethod"===o.type?"get"===o.kind||"set"===o.kind?this.raise(o.key.start,"Object pattern can't contain getter or setter"):this.raise(o.key.start,"Object pattern can't contain methods"):this.toAssignable(o,t,"object destructuring pattern")}break;case"ObjectProperty":this.toAssignable(e.value,t,r);break;case"SpreadProperty":e.type="RestProperty";break;case"ArrayExpression":e.type="ArrayPattern",this.toAssignableList(e.elements,t,r);break;case"AssignmentExpression":"="===e.operator?(e.type="AssignmentPattern",delete e.operator):this.raise(e.left.end,"Only '=' operator can be used for specifying default value.");break;case"MemberExpression":if(!t)break;default:var u="Invalid left-hand side"+(r?" in "+r:"expression");this.raise(e.start,u)}return e},ee.toAssignableList=function(e,t,r){var n=e.length;if(n){var i=e[n-1];if(i&&"RestElement"===i.type)--n;else if(i&&"SpreadElement"===i.type){i.type="RestElement";var s=i.argument;this.toAssignable(s,t,r),"Identifier"!==s.type&&"MemberExpression"!==s.type&&"ArrayPattern"!==s.type&&this.unexpected(s.start),--n}}for(var a=0;a<n;a++){var o=e[a];o&&this.toAssignable(o,t,r)}return e},ee.toReferencedList=function(e){return e},ee.parseSpread=function(e){var t=this.startNode();return this.next(),t.argument=this.parseMaybeAssign(!1,e),this.finishNode(t,"SpreadElement")},ee.parseRest=function(){var e=this.startNode();return this.next(),e.argument=this.parseBindingIdentifier(),this.finishNode(e,"RestElement")},ee.shouldAllowYieldIdentifier=function(){return this.match(R._yield)&&!this.state.strict&&!this.state.inGenerator},ee.parseBindingIdentifier=function(){return this.parseIdentifier(this.shouldAllowYieldIdentifier())},ee.parseBindingAtom=function(){switch(this.state.type){case R._yield:(this.state.strict||this.state.inGenerator)&&this.unexpected();case R.name:return this.parseIdentifier(!0);case R.bracketL:var e=this.startNode();return this.next(),e.elements=this.parseBindingList(R.bracketR,!0),this.finishNode(e,"ArrayPattern");case R.braceL:return this.parseObj(!0);default:this.unexpected()}},ee.parseBindingList=function(e,t){for(var r=[],n=!0;!this.eat(e);)if(n?n=!1:this.expect(R.comma),t&&this.match(R.comma))r.push(null);else{if(this.eat(e))break;if(this.match(R.ellipsis)){r.push(this.parseAssignableListItemTypes(this.parseRest())),this.expect(e);break}for(var i=[];this.match(R.at);)i.push(this.parseDecorator());var s=this.parseMaybeDefault();i.length&&(s.decorators=i),this.parseAssignableListItemTypes(s),r.push(this.parseMaybeDefault(s.start,s.loc.start,s))}return r},ee.parseAssignableListItemTypes=function(e){return e},ee.parseMaybeDefault=function(e,t,r){if(t=t||this.state.startLoc,e=e||this.state.start,r=r||this.parseBindingAtom(),!this.eat(R.eq))return r;var n=this.startNodeAt(e,t);return n.left=r,n.right=this.parseMaybeAssign(),this.finishNode(n,"AssignmentPattern")},ee.checkLVal=function(e,t,r,n){switch(e.type){case"Identifier":if(this.checkReservedWord(e.name,e.start,!1,!0),r){var i="_"+e.name;r[i]?this.raise(e.start,"Argument name clash in strict mode"):r[i]=!0}break;case"MemberExpression":t&&this.raise(e.start,(t?"Binding":"Assigning to")+" member expression");break;case"ObjectPattern":for(var s=e.properties,a=Array.isArray(s),o=0,s=a?s:s[Symbol.iterator]();;){var u;if(a){if(o>=s.length)break;u=s[o++]}else{if(o=s.next(),o.done)break;u=o.value}var l=u;"ObjectProperty"===l.type&&(l=l.value),this.checkLVal(l,t,r,"object destructuring pattern")}break;case"ArrayPattern":for(var c=e.elements,f=Array.isArray(c),p=0,c=f?c:c[Symbol.iterator]();;){var d;if(f){if(p>=c.length)break;d=c[p++]}else{if(p=c.next(),p.done)break;d=p.value}var h=d;h&&this.checkLVal(h,t,r,"array destructuring pattern")}break;case"AssignmentPattern":this.checkLVal(e.left,t,r,"assignment pattern");break;case"RestProperty":this.checkLVal(e.argument,t,r,"rest property");break;case"RestElement":this.checkLVal(e.argument,t,r,"rest element");break;default:var m=(t?"Binding invalid":"Invalid")+" left-hand side"+(n?" in "+n:"expression");this.raise(e.start,m)}};var te=J.prototype;te.checkPropClash=function(e,t){if(!e.computed&&!e.kind){var r=e.key;"__proto__"===("Identifier"===r.type?r.name:String(r.value))&&(t.proto&&this.raise(r.start,"Redefinition of __proto__ property"),t.proto=!0)}},te.getExpression=function(){this.nextToken();var e=this.parseExpression();return this.match(R.eof)||this.unexpected(),e},te.parseExpression=function(e,t){var r=this.state.start,n=this.state.startLoc,i=this.parseMaybeAssign(e,t);if(this.match(R.comma)){var s=this.startNodeAt(r,n);for(s.expressions=[i];this.eat(R.comma);)s.expressions.push(this.parseMaybeAssign(e,t));return this.toReferencedList(s.expressions),this.finishNode(s,"SequenceExpression")}return i},te.parseMaybeAssign=function(e,t,r,n){var i=this.state.start,s=this.state.startLoc;if(this.match(R._yield)&&this.state.inGenerator){var a=this.parseYield();return r&&(a=r.call(this,a,i,s)),a}var o=void 0;t?o=!1:(t={start:0},o=!0),(this.match(R.parenL)||this.match(R.name))&&(this.state.potentialArrowAt=this.state.start);var u=this.parseMaybeConditional(e,t,n);if(r&&(u=r.call(this,u,i,s)),this.state.type.isAssign){var l=this.startNodeAt(i,s);if(l.operator=this.state.value,l.left=this.match(R.eq)?this.toAssignable(u,void 0,"assignment expression"):u,t.start=0,this.checkLVal(u,void 0,void 0,"assignment expression"),u.extra&&u.extra.parenthesized){var c=void 0;"ObjectPattern"===u.type?c="`({a}) = 0` use `({a} = 0)`":"ArrayPattern"===u.type&&(c="`([a]) = 0` use `([a] = 0)`"),c&&this.raise(u.start,"You're trying to assign to a parenthesized expression, eg. instead of "+c)}return this.next(),l.right=this.parseMaybeAssign(e),this.finishNode(l,"AssignmentExpression")}return o&&t.start&&this.unexpected(t.start),u},te.parseMaybeConditional=function(e,t,r){var n=this.state.start,i=this.state.startLoc,s=this.parseExprOps(e,t);return t&&t.start?s:this.parseConditional(s,e,n,i,r)},te.parseConditional=function(e,t,r,n){if(this.eat(R.question)){var i=this.startNodeAt(r,n);return i.test=e,i.consequent=this.parseMaybeAssign(),this.expect(R.colon),i.alternate=this.parseMaybeAssign(t),this.finishNode(i,"ConditionalExpression")}return e},te.parseExprOps=function(e,t){var r=this.state.start,n=this.state.startLoc,i=this.parseMaybeUnary(t);return t&&t.start?i:this.parseExprOp(i,r,n,-1,e)},te.parseExprOp=function(e,t,r,n,i){var s=this.state.type.binop;if(!(null==s||i&&this.match(R._in))&&s>n){var a=this.startNodeAt(t,r);a.left=e,a.operator=this.state.value,"**"!==a.operator||"UnaryExpression"!==e.type||!e.extra||e.extra.parenthesizedArgument||e.extra.parenthesized||this.raise(e.argument.start,"Illegal expression. Wrap left hand side or entire exponentiation in parentheses.");var o=this.state.type;this.next();var u=this.state.start,l=this.state.startLoc;return a.right=this.parseExprOp(this.parseMaybeUnary(),u,l,o.rightAssociative?s-1:s,i),this.finishNode(a,o===R.logicalOR||o===R.logicalAND?"LogicalExpression":"BinaryExpression"),this.parseExprOp(a,t,r,n,i)}return e},te.parseMaybeUnary=function(e){if(this.state.type.prefix){var t=this.startNode(),r=this.match(R.incDec);t.operator=this.state.value,t.prefix=!0,this.next();var n=this.state.type;return t.argument=this.parseMaybeUnary(),this.addExtra(t,"parenthesizedArgument",!(n!==R.parenL||t.argument.extra&&t.argument.extra.parenthesized)),e&&e.start&&this.unexpected(e.start),
+r?this.checkLVal(t.argument,void 0,void 0,"prefix operation"):this.state.strict&&"delete"===t.operator&&"Identifier"===t.argument.type&&this.raise(t.start,"Deleting local variable in strict mode"),this.finishNode(t,r?"UpdateExpression":"UnaryExpression")}var i=this.state.start,s=this.state.startLoc,a=this.parseExprSubscripts(e);if(e&&e.start)return a;for(;this.state.type.postfix&&!this.canInsertSemicolon();){var o=this.startNodeAt(i,s);o.operator=this.state.value,o.prefix=!1,o.argument=a,this.checkLVal(a,void 0,void 0,"postfix operation"),this.next(),a=this.finishNode(o,"UpdateExpression")}return a},te.parseExprSubscripts=function(e){var t=this.state.start,r=this.state.startLoc,n=this.state.potentialArrowAt,i=this.parseExprAtom(e);return"ArrowFunctionExpression"===i.type&&i.start===n?i:e&&e.start?i:this.parseSubscripts(i,t,r)},te.parseSubscripts=function(e,t,r,n){for(;;){if(!n&&this.eat(R.doubleColon)){var i=this.startNodeAt(t,r);return i.object=e,i.callee=this.parseNoCallExpr(),this.parseSubscripts(this.finishNode(i,"BindExpression"),t,r,n)}if(this.eat(R.dot)){var s=this.startNodeAt(t,r);s.object=e,s.property=this.parseIdentifier(!0),s.computed=!1,e=this.finishNode(s,"MemberExpression")}else if(this.eat(R.bracketL)){var a=this.startNodeAt(t,r);a.object=e,a.property=this.parseExpression(),a.computed=!0,this.expect(R.bracketR),e=this.finishNode(a,"MemberExpression")}else if(!n&&this.match(R.parenL)){var o=this.state.potentialArrowAt===e.start&&"Identifier"===e.type&&"async"===e.name&&!this.canInsertSemicolon();this.next();var u=this.startNodeAt(t,r);if(u.callee=e,u.arguments=this.parseCallExpressionArguments(R.parenR,o),"Import"===u.callee.type&&1!==u.arguments.length&&this.raise(u.start,"import() requires exactly one argument"),e=this.finishNode(u,"CallExpression"),o&&this.shouldParseAsyncArrow())return this.parseAsyncArrowFromCallExpression(this.startNodeAt(t,r),u);this.toReferencedList(u.arguments)}else{if(!this.match(R.backQuote))return e;var l=this.startNodeAt(t,r);l.tag=e,l.quasi=this.parseTemplate(),e=this.finishNode(l,"TaggedTemplateExpression")}}},te.parseCallExpressionArguments=function(e,t){for(var r=[],n=void 0,i=!0;!this.eat(e);){if(i)i=!1;else if(this.expect(R.comma),this.eat(e))break;this.match(R.parenL)&&!n&&(n=this.state.start),r.push(this.parseExprListItem(!1,t?{start:0}:void 0,t?{start:0}:void 0))}return t&&n&&this.shouldParseAsyncArrow()&&this.unexpected(),r},te.shouldParseAsyncArrow=function(){return this.match(R.arrow)},te.parseAsyncArrowFromCallExpression=function(e,t){return this.expect(R.arrow),this.parseArrowExpression(e,t.arguments,!0)},te.parseNoCallExpr=function(){var e=this.state.start,t=this.state.startLoc;return this.parseSubscripts(this.parseExprAtom(),e,t,!0)},te.parseExprAtom=function(e){var t=this.state.potentialArrowAt===this.state.start,r=void 0;switch(this.state.type){case R._super:return this.state.inMethod||this.options.allowSuperOutsideMethod||this.raise(this.state.start,"'super' outside of function or class"),r=this.startNode(),this.next(),this.match(R.parenL)||this.match(R.bracketL)||this.match(R.dot)||this.unexpected(),this.match(R.parenL)&&"constructor"!==this.state.inMethod&&!this.options.allowSuperOutsideMethod&&this.raise(r.start,"super() outside of class constructor"),this.finishNode(r,"Super");case R._import:return this.hasPlugin("dynamicImport")||this.unexpected(),r=this.startNode(),this.next(),this.match(R.parenL)||this.unexpected(null,R.parenL),this.finishNode(r,"Import");case R._this:return r=this.startNode(),this.next(),this.finishNode(r,"ThisExpression");case R._yield:this.state.inGenerator&&this.unexpected();case R.name:r=this.startNode();var n="await"===this.state.value&&this.state.inAsync,i=this.shouldAllowYieldIdentifier(),s=this.parseIdentifier(n||i);if("await"===s.name){if(this.state.inAsync||this.inModule)return this.parseAwait(r)}else{if("async"===s.name&&this.match(R._function)&&!this.canInsertSemicolon())return this.next(),this.parseFunction(r,!1,!1,!0);if(t&&"async"===s.name&&this.match(R.name)){var a=[this.parseIdentifier()];return this.expect(R.arrow),this.parseArrowExpression(r,a,!0)}}return t&&!this.canInsertSemicolon()&&this.eat(R.arrow)?this.parseArrowExpression(r,[s]):s;case R._do:if(this.hasPlugin("doExpressions")){var o=this.startNode();this.next();var u=this.state.inFunction,l=this.state.labels;return this.state.labels=[],this.state.inFunction=!1,o.body=this.parseBlock(!1,!0),this.state.inFunction=u,this.state.labels=l,this.finishNode(o,"DoExpression")}case R.regexp:var c=this.state.value;return r=this.parseLiteral(c.value,"RegExpLiteral"),r.pattern=c.pattern,r.flags=c.flags,r;case R.num:return this.parseLiteral(this.state.value,"NumericLiteral");case R.string:return this.parseLiteral(this.state.value,"StringLiteral");case R._null:return r=this.startNode(),this.next(),this.finishNode(r,"NullLiteral");case R._true:case R._false:return r=this.startNode(),r.value=this.match(R._true),this.next(),this.finishNode(r,"BooleanLiteral");case R.parenL:return this.parseParenAndDistinguishExpression(null,null,t);case R.bracketL:return r=this.startNode(),this.next(),r.elements=this.parseExprList(R.bracketR,!0,e),this.toReferencedList(r.elements),this.finishNode(r,"ArrayExpression");case R.braceL:return this.parseObj(!1,e);case R._function:return this.parseFunctionExpression();case R.at:this.parseDecorators();case R._class:return r=this.startNode(),this.takeDecorators(r),this.parseClass(r,!1);case R._new:return this.parseNew();case R.backQuote:return this.parseTemplate();case R.doubleColon:r=this.startNode(),this.next(),r.object=null;var f=r.callee=this.parseNoCallExpr();if("MemberExpression"===f.type)return this.finishNode(r,"BindExpression");this.raise(f.start,"Binding should be performed on object property.");default:this.unexpected()}},te.parseFunctionExpression=function(){var e=this.startNode(),t=this.parseIdentifier(!0);return this.state.inGenerator&&this.eat(R.dot)&&this.hasPlugin("functionSent")?this.parseMetaProperty(e,t,"sent"):this.parseFunction(e,!1)},te.parseMetaProperty=function(e,t,r){return e.meta=t,e.property=this.parseIdentifier(!0),e.property.name!==r&&this.raise(e.property.start,"The only valid meta property for new is "+t.name+"."+r),this.finishNode(e,"MetaProperty")},te.parseLiteral=function(e,t,r,n){r=r||this.state.start,n=n||this.state.startLoc;var i=this.startNodeAt(r,n);return this.addExtra(i,"rawValue",e),this.addExtra(i,"raw",this.input.slice(r,this.state.end)),i.value=e,this.next(),this.finishNode(i,t)},te.parseParenExpression=function(){this.expect(R.parenL);var e=this.parseExpression();return this.expect(R.parenR),e},te.parseParenAndDistinguishExpression=function(e,t,r){e=e||this.state.start,t=t||this.state.startLoc;var n=void 0;this.expect(R.parenL);for(var i=this.state.start,s=this.state.startLoc,a=[],o={start:0},u={start:0},l=!0,c=void 0,f=void 0;!this.match(R.parenR);){if(l)l=!1;else if(this.expect(R.comma,u.start||null),this.match(R.parenR)){f=this.state.start;break}if(this.match(R.ellipsis)){var p=this.state.start,d=this.state.startLoc;c=this.state.start,a.push(this.parseParenItem(this.parseRest(),d,p));break}a.push(this.parseMaybeAssign(!1,o,this.parseParenItem,u))}var h=this.state.start,m=this.state.startLoc;this.expect(R.parenR);var v=this.startNodeAt(e,t);if(r&&this.shouldParseArrow()&&(v=this.parseArrow(v))){for(var y=a,g=Array.isArray(y),b=0,y=g?y:y[Symbol.iterator]();;){var E;if(g){if(b>=y.length)break;E=y[b++]}else{if(b=y.next(),b.done)break;E=b.value}var x=E;x.extra&&x.extra.parenthesized&&this.unexpected(x.extra.parenStart)}return this.parseArrowExpression(v,a)}return a.length||this.unexpected(this.state.lastTokStart),f&&this.unexpected(f),c&&this.unexpected(c),o.start&&this.unexpected(o.start),u.start&&this.unexpected(u.start),a.length>1?(n=this.startNodeAt(i,s),n.expressions=a,this.toReferencedList(n.expressions),this.finishNodeAt(n,"SequenceExpression",h,m)):n=a[0],this.addExtra(n,"parenthesized",!0),this.addExtra(n,"parenStart",e),n},te.shouldParseArrow=function(){return!this.canInsertSemicolon()},te.parseArrow=function(e){if(this.eat(R.arrow))return e},te.parseParenItem=function(e){return e},te.parseNew=function(){var e=this.startNode(),t=this.parseIdentifier(!0);return this.eat(R.dot)?this.parseMetaProperty(e,t,"target"):(e.callee=this.parseNoCallExpr(),this.eat(R.parenL)?(e.arguments=this.parseExprList(R.parenR),this.toReferencedList(e.arguments)):e.arguments=[],this.finishNode(e,"NewExpression"))},te.parseTemplateElement=function(){var e=this.startNode();return e.value={raw:this.input.slice(this.state.start,this.state.end).replace(/\r\n?/g,"\n"),cooked:this.state.value},this.next(),e.tail=this.match(R.backQuote),this.finishNode(e,"TemplateElement")},te.parseTemplate=function(){var e=this.startNode();this.next(),e.expressions=[];var t=this.parseTemplateElement();for(e.quasis=[t];!t.tail;)this.expect(R.dollarBraceL),e.expressions.push(this.parseExpression()),this.expect(R.braceR),e.quasis.push(t=this.parseTemplateElement());return this.next(),this.finishNode(e,"TemplateLiteral")},te.parseObj=function(e,t){var r=[],n=Object.create(null),i=!0,s=this.startNode();s.properties=[],this.next();for(var a=null;!this.eat(R.braceR);){if(i)i=!1;else if(this.expect(R.comma),this.eat(R.braceR))break;for(;this.match(R.at);)r.push(this.parseDecorator());var o=this.startNode(),u=!1,l=!1,c=void 0,f=void 0;if(r.length&&(o.decorators=r,r=[]),this.hasPlugin("objectRestSpread")&&this.match(R.ellipsis)){if(o=this.parseSpread(e?{start:0}:void 0),o.type=e?"RestProperty":"SpreadProperty",e&&this.toAssignable(o.argument,!0,"object pattern"),s.properties.push(o),!e)continue;var p=this.state.start;if(null===a){if(this.eat(R.braceR))break;if(this.match(R.comma)&&this.lookahead().type===R.braceR)continue;a=p;continue}this.unexpected(a,"Cannot have multiple rest elements when destructuring")}if(o.method=!1,o.shorthand=!1,(e||t)&&(c=this.state.start,f=this.state.startLoc),e||(u=this.eat(R.star)),!e&&this.isContextual("async")){u&&this.unexpected();var d=this.parseIdentifier();this.match(R.colon)||this.match(R.parenL)||this.match(R.braceR)||this.match(R.eq)||this.match(R.comma)?(o.key=d,o.computed=!1):(l=!0,this.hasPlugin("asyncGenerators")&&(u=this.eat(R.star)),this.parsePropertyName(o))}else this.parsePropertyName(o);this.parseObjPropValue(o,c,f,u,l,e,t),this.checkPropClash(o,n),o.shorthand&&this.addExtra(o,"shorthand",!0),s.properties.push(o)}return null!==a&&this.unexpected(a,"The rest element has to be the last element when destructuring"),r.length&&this.raise(this.state.start,"You have trailing decorators with no property"),this.finishNode(s,e?"ObjectPattern":"ObjectExpression")},te.isGetterOrSetterMethod=function(e,t){return!t&&!e.computed&&"Identifier"===e.key.type&&("get"===e.key.name||"set"===e.key.name)&&(this.match(R.string)||this.match(R.num)||this.match(R.bracketL)||this.match(R.name)||this.state.type.keyword)},te.checkGetterSetterParamCount=function(e){var t="get"===e.kind?0:1;if(e.params.length!==t){var r=e.start;"get"===e.kind?this.raise(r,"getter should have no params"):this.raise(r,"setter should have exactly one param")}},te.parseObjectMethod=function(e,t,r,n){return r||t||this.match(R.parenL)?(n&&this.unexpected(),e.kind="method",e.method=!0,this.parseMethod(e,t,r),this.finishNode(e,"ObjectMethod")):this.isGetterOrSetterMethod(e,n)?((t||r)&&this.unexpected(),e.kind=e.key.name,this.parsePropertyName(e),this.parseMethod(e),this.checkGetterSetterParamCount(e),this.finishNode(e,"ObjectMethod")):void 0},te.parseObjectProperty=function(e,t,r,n,i){return this.eat(R.colon)?(e.value=n?this.parseMaybeDefault(this.state.start,this.state.startLoc):this.parseMaybeAssign(!1,i),this.finishNode(e,"ObjectProperty")):e.computed||"Identifier"!==e.key.type?void 0:(n?(this.checkReservedWord(e.key.name,e.key.start,!0,!0),e.value=this.parseMaybeDefault(t,r,e.key.__clone())):this.match(R.eq)&&i?(i.start||(i.start=this.state.start),e.value=this.parseMaybeDefault(t,r,e.key.__clone())):e.value=e.key.__clone(),e.shorthand=!0,this.finishNode(e,"ObjectProperty"))},te.parseObjPropValue=function(e,t,r,n,i,s,a){var o=this.parseObjectMethod(e,n,i,s)||this.parseObjectProperty(e,t,r,s,a);return o||this.unexpected(),o},te.parsePropertyName=function(e){if(this.eat(R.bracketL))e.computed=!0,e.key=this.parseMaybeAssign(),this.expect(R.bracketR);else{e.computed=!1;var t=this.state.inPropertyName;this.state.inPropertyName=!0,e.key=this.match(R.num)||this.match(R.string)?this.parseExprAtom():this.parseIdentifier(!0),this.state.inPropertyName=t}return e.key},te.initFunction=function(e,t){e.id=null,e.generator=!1,e.expression=!1,e.async=!!t},te.parseMethod=function(e,t,r){var n=this.state.inMethod;return this.state.inMethod=e.kind||!0,this.initFunction(e,r),this.expect(R.parenL),e.params=this.parseBindingList(R.parenR),e.generator=!!t,this.parseFunctionBody(e),this.state.inMethod=n,e},te.parseArrowExpression=function(e,t,r){return this.initFunction(e,r),e.params=this.toAssignableList(t,!0,"arrow function parameters"),this.parseFunctionBody(e,!0),this.finishNode(e,"ArrowFunctionExpression")},te.isStrictBody=function(e,t){if(!t&&e.body.directives.length)for(var r=e.body.directives,n=Array.isArray(r),i=0,r=n?r:r[Symbol.iterator]();;){var s;if(n){if(i>=r.length)break;s=r[i++]}else{if(i=r.next(),i.done)break;s=i.value}var a=s;if("use strict"===a.value.value)return!0}return!1},te.parseFunctionBody=function(e,t){var r=t&&!this.match(R.braceL),n=this.state.inAsync;if(this.state.inAsync=e.async,r)e.body=this.parseMaybeAssign(),e.expression=!0;else{var i=this.state.inFunction,s=this.state.inGenerator,a=this.state.labels;this.state.inFunction=!0,this.state.inGenerator=e.generator,this.state.labels=[],e.body=this.parseBlock(!0),e.expression=!1,this.state.inFunction=i,this.state.inGenerator=s,this.state.labels=a}this.state.inAsync=n;var o=this.isStrictBody(e,r),u=this.state.strict||t||o;if(o&&e.id&&"Identifier"===e.id.type&&"yield"===e.id.name&&this.raise(e.id.start,"Binding yield in strict mode"),u){var l=Object.create(null),c=this.state.strict;o&&(this.state.strict=!0),e.id&&this.checkLVal(e.id,!0,void 0,"function name");for(var f=e.params,p=Array.isArray(f),d=0,f=p?f:f[Symbol.iterator]();;){var h;if(p){if(d>=f.length)break;h=f[d++]}else{if(d=f.next(),d.done)break;h=d.value}var m=h;o&&"Identifier"!==m.type&&this.raise(m.start,"Non-simple parameter in strict mode"),this.checkLVal(m,!0,l,"function parameter list")}this.state.strict=c}},te.parseExprList=function(e,t,r){for(var n=[],i=!0;!this.eat(e);){if(i)i=!1;else if(this.expect(R.comma),this.eat(e))break;n.push(this.parseExprListItem(t,r))}return n},te.parseExprListItem=function(e,t,r){return e&&this.match(R.comma)?null:this.match(R.ellipsis)?this.parseSpread(t):this.parseMaybeAssign(!1,t,this.parseParenItem,r)},te.parseIdentifier=function(e){var t=this.startNode();return e||this.checkReservedWord(this.state.value,this.state.start,!!this.state.type.keyword,!1),this.match(R.name)?t.name=this.state.value:this.state.type.keyword?t.name=this.state.type.keyword:this.unexpected(),!e&&"await"===t.name&&this.state.inAsync&&this.raise(t.start,"invalid use of await inside of an async function"),t.loc.identifierName=t.name,this.next(),this.finishNode(t,"Identifier")},te.checkReservedWord=function(e,t,r,n){(this.isReservedWord(e)||r&&this.isKeyword(e))&&this.raise(t,e+" is a reserved word"),this.state.strict&&(y.strict(e)||n&&y.strictBind(e))&&this.raise(t,e+" is a reserved word in strict mode")},te.parseAwait=function(e){return this.state.inAsync||this.unexpected(),this.match(R.star)&&this.raise(e.start,"await* has been removed from the async functions proposal. Use Promise.all() instead."),e.argument=this.parseMaybeUnary(),this.finishNode(e,"AwaitExpression")},te.parseYield=function(){var e=this.startNode();return this.next(),this.match(R.semi)||this.canInsertSemicolon()||!this.match(R.star)&&!this.state.type.startsExpr?(e.delegate=!1,e.argument=null):(e.delegate=this.eat(R.star),e.argument=this.parseMaybeAssign()),this.finishNode(e,"YieldExpression")};var re=J.prototype,ne=["leadingComments","trailingComments","innerComments"],ie=function(){function e(t,r,n){w(this,e),this.type="",this.start=t,this.end=0,this.loc=new G(r),n&&(this.loc.filename=n)}return e.prototype.__clone=function(){var t=new e;for(var r in this)ne.indexOf(r)<0&&(t[r]=this[r]);return t},e}();re.startNode=function(){return new ie(this.state.start,this.state.startLoc,this.filename)},re.startNodeAt=function(e,t){return new ie(e,t,this.filename)},re.finishNode=function(e,t){return c.call(this,e,t,this.state.lastTokEnd,this.state.lastTokEndLoc)},re.finishNodeAt=function(e,t,r,n){return c.call(this,e,t,r,n)},J.prototype.raise=function(e,t){var r=u(this.input,e);t+=" ("+r.line+":"+r.column+")";var n=new SyntaxError(t);throw n.pos=e,n.loc=r,n};var se=J.prototype;se.addComment=function(e){this.filename&&(e.loc.filename=this.filename),this.state.trailingComments.push(e),this.state.leadingComments.push(e)},se.processComment=function(e){if(!("Program"===e.type&&e.body.length>0)){var t=this.state.commentStack,r=void 0,n=void 0,i=void 0,s=void 0;if(this.state.trailingComments.length>0)this.state.trailingComments[0].start>=e.end?(n=this.state.trailingComments,this.state.trailingComments=[]):this.state.trailingComments.length=0;else{var a=f(t);t.length>0&&a.trailingComments&&a.trailingComments[0].start>=e.end&&(n=a.trailingComments,a.trailingComments=null)}for(;t.length>0&&f(t).start>=e.start;)r=t.pop();if(r){if(r.leadingComments)if(r!==e&&f(r.leadingComments).end<=e.start)e.leadingComments=r.leadingComments,r.leadingComments=null;else for(i=r.leadingComments.length-2;i>=0;--i)if(r.leadingComments[i].end<=e.start){e.leadingComments=r.leadingComments.splice(0,i+1);break}}else if(this.state.leadingComments.length>0)if(f(this.state.leadingComments).end<=e.start){if(this.state.commentPreviousNode)for(s=0;s<this.state.leadingComments.length;s++)this.state.leadingComments[s].end<this.state.commentPreviousNode.end&&(this.state.leadingComments.splice(s,1),s--);this.state.leadingComments.length>0&&(e.leadingComments=this.state.leadingComments,this.state.leadingComments=[])}else{for(i=0;i<this.state.leadingComments.length&&!(this.state.leadingComments[i].end>e.start);i++);e.leadingComments=this.state.leadingComments.slice(0,i),0===e.leadingComments.length&&(e.leadingComments=null),n=this.state.leadingComments.slice(i),0===n.length&&(n=null)}this.state.commentPreviousNode=e,n&&(n.length&&n[0].start>=e.start&&f(n).end<=e.end?e.innerComments=n:e.trailingComments=n),t.push(e)}};var ae=J.prototype;ae.estreeParseRegExpLiteral=function(e){var t=e.pattern,r=e.flags,n=null;try{n=new RegExp(t,r)}catch(e){}var i=this.estreeParseLiteral(n);return i.regex={pattern:t,flags:r},i},ae.estreeParseLiteral=function(e){return this.parseLiteral(e,"Literal")},ae.directiveToStmt=function(e){var t=e.value,r=this.startNodeAt(e.start,e.loc.start),n=this.startNodeAt(t.start,t.loc.start);return n.value=t.value,n.raw=t.extra.raw,r.expression=this.finishNodeAt(n,"Literal",t.end,t.loc.end),r.directive=t.extra.raw.slice(1,-1),this.finishNodeAt(r,"ExpressionStatement",e.end,e.loc.end)};var oe=function(e){e.extend("checkDeclaration",function(e){return function(t){p(t)?this.checkDeclaration(t.value):e.call(this,t)}}),e.extend("checkGetterSetterParamCount",function(){return function(e){var t="get"===e.kind?0:1;if(e.value.params.length!==t){var r=e.start;"get"===e.kind?this.raise(r,"getter should have no params"):this.raise(r,"setter should have exactly one param")}}}),e.extend("checkLVal",function(e){return function(t,r,n){var i=this;switch(t.type){case"ObjectPattern":t.properties.forEach(function(e){i.checkLVal("Property"===e.type?e.value:e,r,n,"object destructuring pattern")});break;default:for(var s=arguments.length,a=Array(s>3?s-3:0),o=3;o<s;o++)a[o-3]=arguments[o];e.call.apply(e,[this,t,r,n].concat(a))}}}),e.extend("checkPropClash",function(){return function(e,t){if(!e.computed&&p(e)){var r=e.key;"__proto__"===("Identifier"===r.type?r.name:String(r.value))&&(t.proto&&this.raise(r.start,"Redefinition of __proto__ property"),t.proto=!0)}}}),e.extend("isStrictBody",function(){return function(e,t){if(!t&&e.body.body.length>0)for(var r=e.body.body,n=Array.isArray(r),i=0,r=n?r:r[Symbol.iterator]();;){var s;if(n){if(i>=r.length)break;s=r[i++]}else{if(i=r.next(),i.done)break;s=i.value}var a=s;if("ExpressionStatement"!==a.type||"Literal"!==a.expression.type)break;if("use strict"===a.expression.value)return!0}return!1}}),e.extend("isValidDirective",function(){return function(e){return!("ExpressionStatement"!==e.type||"Literal"!==e.expression.type||"string"!=typeof e.expression.value||e.expression.extra&&e.expression.extra.parenthesized)}}),e.extend("parseBlockBody",function(e){return function(t){for(var r=this,n=arguments.length,i=Array(n>1?n-1:0),s=1;s<n;s++)i[s-1]=arguments[s];e.call.apply(e,[this,t].concat(i)),t.directives.reverse().forEach(function(e){t.body.unshift(r.directiveToStmt(e))}),delete t.directives}}),e.extend("parseClassMethod",function(e){return function(t){for(var r=arguments.length,n=Array(r>1?r-1:0),i=1;i<r;i++)n[i-1]=arguments[i];e.call.apply(e,[this,t].concat(n));var s=t.body;s[s.length-1].type="MethodDefinition"}}),e.extend("parseExprAtom",function(e){return function(){switch(this.state.type){case R.regexp:return this.estreeParseRegExpLiteral(this.state.value);case R.num:case R.string:return this.estreeParseLiteral(this.state.value);case R._null:return this.estreeParseLiteral(null);case R._true:return this.estreeParseLiteral(!0);case R._false:return this.estreeParseLiteral(!1);default:for(var t=arguments.length,r=Array(t),n=0;n<t;n++)r[n]=arguments[n];return e.call.apply(e,[this].concat(r))}}}),e.extend("parseLiteral",function(e){return function(){for(var t=arguments.length,r=Array(t),n=0;n<t;n++)r[n]=arguments[n];var i=e.call.apply(e,[this].concat(r));return i.raw=i.extra.raw,delete i.extra,i}}),e.extend("parseMethod",function(e){return function(t){var r=this.startNode();r.kind=t.kind;for(var n=arguments.length,i=Array(n>1?n-1:0),s=1;s<n;s++)i[s-1]=arguments[s];return r=e.call.apply(e,[this,r].concat(i)),delete r.kind,t.value=this.finishNode(r,"FunctionExpression"),t}}),e.extend("parseObjectMethod",function(e){return function(){for(var t=arguments.length,r=Array(t),n=0;n<t;n++)r[n]=arguments[n];var i=e.call.apply(e,[this].concat(r));return i&&("method"===i.kind&&(i.kind="init"),i.type="Property"),i}}),e.extend("parseObjectProperty",function(e){return function(){for(var t=arguments.length,r=Array(t),n=0;n<t;n++)r[n]=arguments[n];var i=e.call.apply(e,[this].concat(r));return i&&(i.kind="init",i.type="Property"),i}}),e.extend("toAssignable",function(e){return function(t,r){for(var n=arguments.length,i=Array(n>2?n-2:0),s=2;s<n;s++)i[s-2]=arguments[s];if(p(t))return this.toAssignable.apply(this,[t.value,r].concat(i)),t;if("ObjectExpression"===t.type){t.type="ObjectPattern";for(var a=t.properties,o=Array.isArray(a),u=0,a=o?a:a[Symbol.iterator]();;){var l;if(o){if(u>=a.length)break;l=a[u++]}else{if(u=a.next(),u.done)break;l=u.value}var c=l;"get"===c.kind||"set"===c.kind?this.raise(c.key.start,"Object pattern can't contain getter or setter"):c.method?this.raise(c.key.start,"Object pattern can't contain methods"):this.toAssignable(c,r,"object destructuring pattern")}return t}return e.call.apply(e,[this,t,r].concat(i))}})},ue=["any","mixed","empty","bool","boolean","number","string","void","null"],le=J.prototype;le.flowParseTypeInitialiser=function(e){var t=this.state.inType;this.state.inType=!0,this.expect(e||R.colon);var r=this.flowParseType();return this.state.inType=t,r},le.flowParsePredicate=function(){var e=this.startNode(),t=this.state.startLoc,r=this.state.start;this.expect(R.modulo);var n=this.state.startLoc;return this.expectContextual("checks"),t.line===n.line&&t.column===n.column-1||this.raise(r,"Spaces between ´%´ and ´checks´ are not allowed here."),this.eat(R.parenL)?(e.expression=this.parseExpression(),this.expect(R.parenR),this.finishNode(e,"DeclaredPredicate")):this.finishNode(e,"InferredPredicate")},le.flowParseTypeAndPredicateInitialiser=function(){var e=this.state.inType;this.state.inType=!0,this.expect(R.colon);var t=null,r=null;return this.match(R.modulo)?(this.state.inType=e,r=this.flowParsePredicate()):(t=this.flowParseType(),this.state.inType=e,this.match(R.modulo)&&(r=this.flowParsePredicate())),[t,r]},le.flowParseDeclareClass=function(e){return this.next(),this.flowParseInterfaceish(e,!0),this.finishNode(e,"DeclareClass")},le.flowParseDeclareFunction=function(e){this.next();var t=e.id=this.parseIdentifier(),r=this.startNode(),n=this.startNode();this.isRelational("<")?r.typeParameters=this.flowParseTypeParameterDeclaration():r.typeParameters=null,this.expect(R.parenL);var i=this.flowParseFunctionTypeParams();r.params=i.params,r.rest=i.rest,this.expect(R.parenR);var s=null,a=this.flowParseTypeAndPredicateInitialiser();return r.returnType=a[0],s=a[1],n.typeAnnotation=this.finishNode(r,"FunctionTypeAnnotation"),n.predicate=s,t.typeAnnotation=this.finishNode(n,"TypeAnnotation"),this.finishNode(t,t.type),this.semicolon(),this.finishNode(e,"DeclareFunction")},le.flowParseDeclare=function(e){return this.match(R._class)?this.flowParseDeclareClass(e):this.match(R._function)?this.flowParseDeclareFunction(e):this.match(R._var)?this.flowParseDeclareVariable(e):this.isContextual("module")?this.lookahead().type===R.dot?this.flowParseDeclareModuleExports(e):this.flowParseDeclareModule(e):this.isContextual("type")?this.flowParseDeclareTypeAlias(e):this.isContextual("interface")?this.flowParseDeclareInterface(e):void this.unexpected()},le.flowParseDeclareVariable=function(e){return this.next(),e.id=this.flowParseTypeAnnotatableIdentifier(),this.semicolon(),this.finishNode(e,"DeclareVariable")},le.flowParseDeclareModule=function(e){this.next(),this.match(R.string)?e.id=this.parseExprAtom():e.id=this.parseIdentifier();var t=e.body=this.startNode(),r=t.body=[];for(this.expect(R.braceL);!this.match(R.braceR);){var n=this.startNode();if(this.match(R._import)){var i=this.lookahead();"type"!==i.value&&"typeof"!==i.value&&this.unexpected(null,"Imports within a `declare module` body must always be `import type` or `import typeof`"),this.parseImport(n)}else this.expectContextual("declare","Only declares and type imports are allowed inside declare module"),n=this.flowParseDeclare(n,!0);r.push(n)}return this.expect(R.braceR),this.finishNode(t,"BlockStatement"),this.finishNode(e,"DeclareModule")},le.flowParseDeclareModuleExports=function(e){return this.expectContextual("module"),this.expect(R.dot),this.expectContextual("exports"),e.typeAnnotation=this.flowParseTypeAnnotation(),this.semicolon(),this.finishNode(e,"DeclareModuleExports")},le.flowParseDeclareTypeAlias=function(e){return this.next(),this.flowParseTypeAlias(e),this.finishNode(e,"DeclareTypeAlias")},le.flowParseDeclareInterface=function(e){return this.next(),this.flowParseInterfaceish(e),this.finishNode(e,"DeclareInterface")},le.flowParseInterfaceish=function(e,t){if(e.id=this.parseIdentifier(),this.isRelational("<")?e.typeParameters=this.flowParseTypeParameterDeclaration():e.typeParameters=null,e.extends=[],e.mixins=[],this.eat(R._extends))do{e.extends.push(this.flowParseInterfaceExtends())}while(this.eat(R.comma));if(this.isContextual("mixins")){this.next();do{e.mixins.push(this.flowParseInterfaceExtends())}while(this.eat(R.comma))}e.body=this.flowParseObjectType(t)},le.flowParseInterfaceExtends=function(){var e=this.startNode();return e.id=this.flowParseQualifiedTypeIdentifier(),this.isRelational("<")?e.typeParameters=this.flowParseTypeParameterInstantiation():e.typeParameters=null,this.finishNode(e,"InterfaceExtends")},le.flowParseInterface=function(e){return this.flowParseInterfaceish(e,!1),this.finishNode(e,"InterfaceDeclaration")},le.flowParseRestrictedIdentifier=function(e){return ue.indexOf(this.state.value)>-1&&this.raise(this.state.start,"Cannot overwrite primitive type "+this.state.value),this.parseIdentifier(e)},le.flowParseTypeAlias=function(e){return e.id=this.flowParseRestrictedIdentifier(),this.isRelational("<")?e.typeParameters=this.flowParseTypeParameterDeclaration():e.typeParameters=null,e.right=this.flowParseTypeInitialiser(R.eq),this.semicolon(),this.finishNode(e,"TypeAlias")},le.flowParseTypeParameter=function(){var e=this.startNode(),t=this.flowParseVariance(),r=this.flowParseTypeAnnotatableIdentifier();return e.name=r.name,e.variance=t,e.bound=r.typeAnnotation,this.match(R.eq)&&(this.eat(R.eq),e.default=this.flowParseType()),this.finishNode(e,"TypeParameter")},le.flowParseTypeParameterDeclaration=function(){var e=this.state.inType,t=this.startNode();t.params=[],this.state.inType=!0,this.isRelational("<")||this.match(R.jsxTagStart)?this.next():this.unexpected();do{t.params.push(this.flowParseTypeParameter()),this.isRelational(">")||this.expect(R.comma)}while(!this.isRelational(">"));return this.expectRelational(">"),this.state.inType=e,this.finishNode(t,"TypeParameterDeclaration")},le.flowParseTypeParameterInstantiation=function(){var e=this.startNode(),t=this.state.inType;for(e.params=[],this.state.inType=!0,this.expectRelational("<");!this.isRelational(">");)e.params.push(this.flowParseType()),this.isRelational(">")||this.expect(R.comma);return this.expectRelational(">"),this.state.inType=t,this.finishNode(e,"TypeParameterInstantiation")},le.flowParseObjectPropertyKey=function(){return this.match(R.num)||this.match(R.string)?this.parseExprAtom():this.parseIdentifier(!0)},le.flowParseObjectTypeIndexer=function(e,t,r){return e.static=t,this.expect(R.bracketL),this.lookahead().type===R.colon?(e.id=this.flowParseObjectPropertyKey(),e.key=this.flowParseTypeInitialiser()):(e.id=null,e.key=this.flowParseType()),this.expect(R.bracketR),e.value=this.flowParseTypeInitialiser(),e.variance=r,this.flowObjectTypeSemicolon(),this.finishNode(e,"ObjectTypeIndexer")},le.flowParseObjectTypeMethodish=function(e){for(e.params=[],e.rest=null,e.typeParameters=null,this.isRelational("<")&&(e.typeParameters=this.flowParseTypeParameterDeclaration()),this.expect(R.parenL);this.match(R.name);)e.params.push(this.flowParseFunctionTypeParam()),this.match(R.parenR)||this.expect(R.comma);return this.eat(R.ellipsis)&&(e.rest=this.flowParseFunctionTypeParam()),this.expect(R.parenR),e.returnType=this.flowParseTypeInitialiser(),this.finishNode(e,"FunctionTypeAnnotation")},le.flowParseObjectTypeMethod=function(e,t,r,n){var i=this.startNodeAt(e,t);return i.value=this.flowParseObjectTypeMethodish(this.startNodeAt(e,t)),i.static=r,i.key=n,i.optional=!1,this.flowObjectTypeSemicolon(),this.finishNode(i,"ObjectTypeProperty")},le.flowParseObjectTypeCallProperty=function(e,t){var r=this.startNode();return e.static=t,e.value=this.flowParseObjectTypeMethodish(r),this.flowObjectTypeSemicolon(),this.finishNode(e,"ObjectTypeCallProperty")},le.flowParseObjectType=function(e,t){var r=this.state.inType;this.state.inType=!0;var n=this.startNode(),i=void 0,s=void 0,a=!1;n.callProperties=[],n.properties=[],n.indexers=[];var o=void 0,u=void 0;for(t&&this.match(R.braceBarL)?(this.expect(R.braceBarL),o=R.braceBarR,u=!0):(this.expect(R.braceL),o=R.braceR,u=!1),n.exact=u;!this.match(o);){var l=!1,c=this.state.start,f=this.state.startLoc;i=this.startNode(),e&&this.isContextual("static")&&this.lookahead().type!==R.colon&&(this.next(),a=!0);var p=this.state.start,d=this.flowParseVariance();this.match(R.bracketL)?n.indexers.push(this.flowParseObjectTypeIndexer(i,a,d)):this.match(R.parenL)||this.isRelational("<")?(d&&this.unexpected(p),n.callProperties.push(this.flowParseObjectTypeCallProperty(i,a))):(s=this.flowParseObjectPropertyKey(),this.isRelational("<")||this.match(R.parenL)?(d&&this.unexpected(p),n.properties.push(this.flowParseObjectTypeMethod(c,f,a,s))):(this.eat(R.question)&&(l=!0),i.key=s,i.value=this.flowParseTypeInitialiser(),i.optional=l,i.static=a,i.variance=d,this.flowObjectTypeSemicolon(),
+n.properties.push(this.finishNode(i,"ObjectTypeProperty")))),a=!1}this.expect(o);var h=this.finishNode(n,"ObjectTypeAnnotation");return this.state.inType=r,h},le.flowObjectTypeSemicolon=function(){this.eat(R.semi)||this.eat(R.comma)||this.match(R.braceR)||this.match(R.braceBarR)||this.unexpected()},le.flowParseQualifiedTypeIdentifier=function(e,t,r){e=e||this.state.start,t=t||this.state.startLoc;for(var n=r||this.parseIdentifier();this.eat(R.dot);){var i=this.startNodeAt(e,t);i.qualification=n,i.id=this.parseIdentifier(),n=this.finishNode(i,"QualifiedTypeIdentifier")}return n},le.flowParseGenericType=function(e,t,r){var n=this.startNodeAt(e,t);return n.typeParameters=null,n.id=this.flowParseQualifiedTypeIdentifier(e,t,r),this.isRelational("<")&&(n.typeParameters=this.flowParseTypeParameterInstantiation()),this.finishNode(n,"GenericTypeAnnotation")},le.flowParseTypeofType=function(){var e=this.startNode();return this.expect(R._typeof),e.argument=this.flowParsePrimaryType(),this.finishNode(e,"TypeofTypeAnnotation")},le.flowParseTupleType=function(){var e=this.startNode();for(e.types=[],this.expect(R.bracketL);this.state.pos<this.input.length&&!this.match(R.bracketR)&&(e.types.push(this.flowParseType()),!this.match(R.bracketR));)this.expect(R.comma);return this.expect(R.bracketR),this.finishNode(e,"TupleTypeAnnotation")},le.flowParseFunctionTypeParam=function(){var e=null,t=!1,r=null,n=this.startNode(),i=this.lookahead();return i.type===R.colon||i.type===R.question?(e=this.parseIdentifier(),this.eat(R.question)&&(t=!0),r=this.flowParseTypeInitialiser()):r=this.flowParseType(),n.name=e,n.optional=t,n.typeAnnotation=r,this.finishNode(n,"FunctionTypeParam")},le.reinterpretTypeAsFunctionTypeParam=function(e){var t=this.startNodeAt(e.start,e.loc);return t.name=null,t.optional=!1,t.typeAnnotation=e,this.finishNode(t,"FunctionTypeParam")},le.flowParseFunctionTypeParams=function(){for(var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:[],t={params:e,rest:null};!this.match(R.parenR)&&!this.match(R.ellipsis);)t.params.push(this.flowParseFunctionTypeParam()),this.match(R.parenR)||this.expect(R.comma);return this.eat(R.ellipsis)&&(t.rest=this.flowParseFunctionTypeParam()),t},le.flowIdentToTypeAnnotation=function(e,t,r,n){switch(n.name){case"any":return this.finishNode(r,"AnyTypeAnnotation");case"void":return this.finishNode(r,"VoidTypeAnnotation");case"bool":case"boolean":return this.finishNode(r,"BooleanTypeAnnotation");case"mixed":return this.finishNode(r,"MixedTypeAnnotation");case"empty":return this.finishNode(r,"EmptyTypeAnnotation");case"number":return this.finishNode(r,"NumberTypeAnnotation");case"string":return this.finishNode(r,"StringTypeAnnotation");default:return this.flowParseGenericType(e,t,n)}},le.flowParsePrimaryType=function(){var e=this.state.start,t=this.state.startLoc,r=this.startNode(),n=void 0,i=void 0,s=!1,a=this.state.noAnonFunctionType;switch(this.state.type){case R.name:return this.flowIdentToTypeAnnotation(e,t,r,this.parseIdentifier());case R.braceL:return this.flowParseObjectType(!1,!1);case R.braceBarL:return this.flowParseObjectType(!1,!0);case R.bracketL:return this.flowParseTupleType();case R.relational:if("<"===this.state.value)return r.typeParameters=this.flowParseTypeParameterDeclaration(),this.expect(R.parenL),n=this.flowParseFunctionTypeParams(),r.params=n.params,r.rest=n.rest,this.expect(R.parenR),this.expect(R.arrow),r.returnType=this.flowParseType(),this.finishNode(r,"FunctionTypeAnnotation");break;case R.parenL:if(this.next(),!this.match(R.parenR)&&!this.match(R.ellipsis))if(this.match(R.name)){var o=this.lookahead().type;s=o!==R.question&&o!==R.colon}else s=!0;if(s){if(this.state.noAnonFunctionType=!1,i=this.flowParseType(),this.state.noAnonFunctionType=a,this.state.noAnonFunctionType||!(this.match(R.comma)||this.match(R.parenR)&&this.lookahead().type===R.arrow))return this.expect(R.parenR),i;this.eat(R.comma)}return n=i?this.flowParseFunctionTypeParams([this.reinterpretTypeAsFunctionTypeParam(i)]):this.flowParseFunctionTypeParams(),r.params=n.params,r.rest=n.rest,this.expect(R.parenR),this.expect(R.arrow),r.returnType=this.flowParseType(),r.typeParameters=null,this.finishNode(r,"FunctionTypeAnnotation");case R.string:return this.parseLiteral(this.state.value,"StringLiteralTypeAnnotation");case R._true:case R._false:return r.value=this.match(R._true),this.next(),this.finishNode(r,"BooleanLiteralTypeAnnotation");case R.plusMin:if("-"===this.state.value)return this.next(),this.match(R.num)||this.unexpected(null,"Unexpected token, expected number"),this.parseLiteral(-this.state.value,"NumericLiteralTypeAnnotation",r.start,r.loc.start);this.unexpected();case R.num:return this.parseLiteral(this.state.value,"NumericLiteralTypeAnnotation");case R._null:return r.value=this.match(R._null),this.next(),this.finishNode(r,"NullLiteralTypeAnnotation");case R._this:return r.value=this.match(R._this),this.next(),this.finishNode(r,"ThisTypeAnnotation");case R.star:return this.next(),this.finishNode(r,"ExistentialTypeParam");default:if("typeof"===this.state.type.keyword)return this.flowParseTypeofType()}this.unexpected()},le.flowParsePostfixType=function(){for(var e=this.state.start,t=this.state.startLoc,r=this.flowParsePrimaryType();!this.canInsertSemicolon()&&this.match(R.bracketL);){var n=this.startNodeAt(e,t);n.elementType=r,this.expect(R.bracketL),this.expect(R.bracketR),r=this.finishNode(n,"ArrayTypeAnnotation")}return r},le.flowParsePrefixType=function(){var e=this.startNode();return this.eat(R.question)?(e.typeAnnotation=this.flowParsePrefixType(),this.finishNode(e,"NullableTypeAnnotation")):this.flowParsePostfixType()},le.flowParseAnonFunctionWithoutParens=function(){var e=this.flowParsePrefixType();if(!this.state.noAnonFunctionType&&this.eat(R.arrow)){var t=this.startNodeAt(e.start,e.loc);return t.params=[this.reinterpretTypeAsFunctionTypeParam(e)],t.rest=null,t.returnType=this.flowParseType(),t.typeParameters=null,this.finishNode(t,"FunctionTypeAnnotation")}return e},le.flowParseIntersectionType=function(){var e=this.startNode();this.eat(R.bitwiseAND);var t=this.flowParseAnonFunctionWithoutParens();for(e.types=[t];this.eat(R.bitwiseAND);)e.types.push(this.flowParseAnonFunctionWithoutParens());return 1===e.types.length?t:this.finishNode(e,"IntersectionTypeAnnotation")},le.flowParseUnionType=function(){var e=this.startNode();this.eat(R.bitwiseOR);var t=this.flowParseIntersectionType();for(e.types=[t];this.eat(R.bitwiseOR);)e.types.push(this.flowParseIntersectionType());return 1===e.types.length?t:this.finishNode(e,"UnionTypeAnnotation")},le.flowParseType=function(){var e=this.state.inType;this.state.inType=!0;var t=this.flowParseUnionType();return this.state.inType=e,t},le.flowParseTypeAnnotation=function(){var e=this.startNode();return e.typeAnnotation=this.flowParseTypeInitialiser(),this.finishNode(e,"TypeAnnotation")},le.flowParseTypeAndPredicateAnnotation=function(){var e=this.startNode(),t=this.flowParseTypeAndPredicateInitialiser();return e.typeAnnotation=t[0],e.predicate=t[1],this.finishNode(e,"TypeAnnotation")},le.flowParseTypeAnnotatableIdentifier=function(){var e=this.flowParseRestrictedIdentifier();return this.match(R.colon)&&(e.typeAnnotation=this.flowParseTypeAnnotation(),this.finishNode(e,e.type)),e},le.typeCastToParameter=function(e){return e.expression.typeAnnotation=e.typeAnnotation,this.finishNodeAt(e.expression,e.expression.type,e.typeAnnotation.end,e.typeAnnotation.loc.end)},le.flowParseVariance=function(){var e=null;return this.match(R.plusMin)&&("+"===this.state.value?e="plus":"-"===this.state.value&&(e="minus"),this.next()),e};var ce=function(e){e.extend("parseFunctionBody",function(e){return function(t,r){return this.match(R.colon)&&!r&&(t.returnType=this.flowParseTypeAndPredicateAnnotation()),e.call(this,t,r)}}),e.extend("parseStatement",function(e){return function(t,r){if(this.state.strict&&this.match(R.name)&&"interface"===this.state.value){var n=this.startNode();return this.next(),this.flowParseInterface(n)}return e.call(this,t,r)}}),e.extend("parseExpressionStatement",function(e){return function(t,r){if("Identifier"===r.type)if("declare"===r.name){if(this.match(R._class)||this.match(R.name)||this.match(R._function)||this.match(R._var))return this.flowParseDeclare(t)}else if(this.match(R.name)){if("interface"===r.name)return this.flowParseInterface(t);if("type"===r.name)return this.flowParseTypeAlias(t)}return e.call(this,t,r)}}),e.extend("shouldParseExportDeclaration",function(e){return function(){return this.isContextual("type")||this.isContextual("interface")||e.call(this)}}),e.extend("parseConditional",function(e){return function(t,r,n,i,s){if(s&&this.match(R.question)){var a=this.state.clone();try{return e.call(this,t,r,n,i)}catch(e){if(e instanceof SyntaxError)return this.state=a,s.start=e.pos||this.state.start,t;throw e}}return e.call(this,t,r,n,i)}}),e.extend("parseParenItem",function(e){return function(t,r,n){if(t=e.call(this,t,r,n),this.eat(R.question)&&(t.optional=!0),this.match(R.colon)){var i=this.startNodeAt(r,n);return i.expression=t,i.typeAnnotation=this.flowParseTypeAnnotation(),this.finishNode(i,"TypeCastExpression")}return t}}),e.extend("parseExport",function(e){return function(t){return t=e.call(this,t),"ExportNamedDeclaration"===t.type&&(t.exportKind=t.exportKind||"value"),t}}),e.extend("parseExportDeclaration",function(e){return function(t){if(this.isContextual("type")){t.exportKind="type";var r=this.startNode();return this.next(),this.match(R.braceL)?(t.specifiers=this.parseExportSpecifiers(),this.parseExportFrom(t),null):this.flowParseTypeAlias(r)}if(this.isContextual("interface")){t.exportKind="type";var n=this.startNode();return this.next(),this.flowParseInterface(n)}return e.call(this,t)}}),e.extend("parseClassId",function(e){return function(t){e.apply(this,arguments),this.isRelational("<")&&(t.typeParameters=this.flowParseTypeParameterDeclaration())}}),e.extend("isKeyword",function(e){return function(t){return(!this.state.inType||"void"!==t)&&e.call(this,t)}}),e.extend("readToken",function(e){return function(t){return!this.state.inType||62!==t&&60!==t?e.call(this,t):this.finishOp(R.relational,1)}}),e.extend("jsx_readToken",function(e){return function(){if(!this.state.inType)return e.call(this)}}),e.extend("toAssignable",function(e){return function(t,r,n){return"TypeCastExpression"===t.type?e.call(this,this.typeCastToParameter(t),r,n):e.call(this,t,r,n)}}),e.extend("toAssignableList",function(e){return function(t,r,n){for(var i=0;i<t.length;i++){var s=t[i];s&&"TypeCastExpression"===s.type&&(t[i]=this.typeCastToParameter(s))}return e.call(this,t,r,n)}}),e.extend("toReferencedList",function(){return function(e){for(var t=0;t<e.length;t++){var r=e[t];r&&r._exprListItem&&"TypeCastExpression"===r.type&&this.raise(r.start,"Unexpected type cast")}return e}}),e.extend("parseExprListItem",function(e){return function(){for(var t=this.startNode(),r=arguments.length,n=Array(r),i=0;i<r;i++)n[i]=arguments[i];var s=e.call.apply(e,[this].concat(n));return this.match(R.colon)?(t._exprListItem=!0,t.expression=s,t.typeAnnotation=this.flowParseTypeAnnotation(),this.finishNode(t,"TypeCastExpression")):s}}),e.extend("checkLVal",function(e){return function(t){if("TypeCastExpression"!==t.type)return e.apply(this,arguments)}}),e.extend("parseClassProperty",function(e){return function(t){return delete t.variancePos,this.match(R.colon)&&(t.typeAnnotation=this.flowParseTypeAnnotation()),e.call(this,t)}}),e.extend("isClassProperty",function(e){return function(){return this.match(R.colon)||e.call(this)}}),e.extend("parseClassMethod",function(e){return function(t,r){r.variance&&this.unexpected(r.variancePos),delete r.variance,delete r.variancePos,this.isRelational("<")&&(r.typeParameters=this.flowParseTypeParameterDeclaration());for(var n=arguments.length,i=Array(n>2?n-2:0),s=2;s<n;s++)i[s-2]=arguments[s];e.call.apply(e,[this,t,r].concat(i))}}),e.extend("parseClassSuper",function(e){return function(t,r){if(e.call(this,t,r),t.superClass&&this.isRelational("<")&&(t.superTypeParameters=this.flowParseTypeParameterInstantiation()),this.isContextual("implements")){this.next();var n=t.implements=[];do{var i=this.startNode();i.id=this.parseIdentifier(),this.isRelational("<")?i.typeParameters=this.flowParseTypeParameterInstantiation():i.typeParameters=null,n.push(this.finishNode(i,"ClassImplements"))}while(this.eat(R.comma))}}}),e.extend("parsePropertyName",function(e){return function(t){var r=this.state.start,n=this.flowParseVariance(),i=e.call(this,t);return t.variance=n,t.variancePos=r,i}}),e.extend("parseObjPropValue",function(e){return function(t){t.variance&&this.unexpected(t.variancePos),delete t.variance,delete t.variancePos;var r=void 0;this.isRelational("<")&&(r=this.flowParseTypeParameterDeclaration(),this.match(R.parenL)||this.unexpected()),e.apply(this,arguments),r&&((t.value||t).typeParameters=r)}}),e.extend("parseAssignableListItemTypes",function(){return function(e){return this.eat(R.question)&&(e.optional=!0),this.match(R.colon)&&(e.typeAnnotation=this.flowParseTypeAnnotation()),this.finishNode(e,e.type),e}}),e.extend("parseMaybeDefault",function(e){return function(){for(var t=arguments.length,r=Array(t),n=0;n<t;n++)r[n]=arguments[n];var i=e.apply(this,r);return"AssignmentPattern"===i.type&&i.typeAnnotation&&i.right.start<i.typeAnnotation.start&&this.raise(i.typeAnnotation.start,"Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`"),i}}),e.extend("parseImportSpecifiers",function(e){return function(t){t.importKind="value";var r=null;if(this.match(R._typeof)?r="typeof":this.isContextual("type")&&(r="type"),r){var n=this.lookahead();(n.type===R.name&&"from"!==n.value||n.type===R.braceL||n.type===R.star)&&(this.next(),t.importKind=r)}e.call(this,t)}}),e.extend("parseImportSpecifier",function(){return function(e){var t=this.startNode(),r=this.state.start,n=this.parseIdentifier(!0),i=null;"type"===n.name?i="type":"typeof"===n.name&&(i="typeof");var s=!1;if(this.isContextual("as")){var a=this.parseIdentifier(!0);null===i||this.match(R.name)||this.state.type.keyword?(t.imported=n,t.importKind=null,t.local=this.parseIdentifier()):(t.imported=a,t.importKind=i,t.local=a.__clone())}else null!==i&&(this.match(R.name)||this.state.type.keyword)?(t.imported=this.parseIdentifier(!0),t.importKind=i,this.eatContextual("as")?t.local=this.parseIdentifier():(s=!0,t.local=t.imported.__clone())):(s=!0,t.imported=n,t.importKind=null,t.local=t.imported.__clone());"type"!==e.importKind&&"typeof"!==e.importKind||"type"!==t.importKind&&"typeof"!==t.importKind||this.raise(r,"`The `type` and `typeof` keywords on named imports can only be used on regular `import` statements. It cannot be used with `import type` or `import typeof` statements`"),s&&this.checkReservedWord(t.local.name,t.start,!0,!0),this.checkLVal(t.local,!0,void 0,"import specifier"),e.specifiers.push(this.finishNode(t,"ImportSpecifier"))}}),e.extend("parseFunctionParams",function(e){return function(t){this.isRelational("<")&&(t.typeParameters=this.flowParseTypeParameterDeclaration()),e.call(this,t)}}),e.extend("parseVarHead",function(e){return function(t){e.call(this,t),this.match(R.colon)&&(t.id.typeAnnotation=this.flowParseTypeAnnotation(),this.finishNode(t.id,t.id.type))}}),e.extend("parseAsyncArrowFromCallExpression",function(e){return function(t,r){if(this.match(R.colon)){var n=this.state.noAnonFunctionType;this.state.noAnonFunctionType=!0,t.returnType=this.flowParseTypeAnnotation(),this.state.noAnonFunctionType=n}return e.call(this,t,r)}}),e.extend("shouldParseAsyncArrow",function(e){return function(){return this.match(R.colon)||e.call(this)}}),e.extend("parseMaybeAssign",function(e){return function(){for(var t=null,r=arguments.length,n=Array(r),i=0;i<r;i++)n[i]=arguments[i];if(R.jsxTagStart&&this.match(R.jsxTagStart)){var s=this.state.clone();try{return e.apply(this,n)}catch(e){if(!(e instanceof SyntaxError))throw e;this.state=s,t=e}}if(this.state.context.push(U.parenExpression),null!=t||this.isRelational("<")){var a=void 0,o=void 0;try{o=this.flowParseTypeParameterDeclaration(),a=e.apply(this,n),a.typeParameters=o,a.start=o.start,a.loc.start=o.loc.start}catch(e){throw t||e}if("ArrowFunctionExpression"===a.type)return a;if(null!=t)throw t;this.raise(o.start,"Expected an arrow function after this type parameter declaration")}return this.state.context.pop(),e.apply(this,n)}}),e.extend("parseArrow",function(e){return function(t){if(this.match(R.colon)){var r=this.state.clone();try{var n=this.state.noAnonFunctionType;this.state.noAnonFunctionType=!0;var i=this.flowParseTypeAndPredicateAnnotation();this.state.noAnonFunctionType=n,this.canInsertSemicolon()&&this.unexpected(),this.match(R.arrow)||this.unexpected(),t.returnType=i}catch(e){if(!(e instanceof SyntaxError))throw e;this.state=r}}return e.call(this,t)}}),e.extend("shouldParseArrow",function(e){return function(){return this.match(R.colon)||e.call(this)}}),e.extend("isClassMutatorStarter",function(e){return function(){return!!this.isRelational("<")||e.call(this)}})},fe=String.fromCodePoint;if(!fe){var pe=String.fromCharCode,de=Math.floor;fe=function(){var e=[],t=void 0,r=void 0,n=-1,i=arguments.length;if(!i)return"";for(var s="";++n<i;){var a=Number(arguments[n]);if(!isFinite(a)||a<0||a>1114111||de(a)!=a)throw RangeError("Invalid code point: "+a);a<=65535?e.push(a):(a-=65536,t=55296+(a>>10),r=a%1024+56320,e.push(t,r)),(n+1==i||e.length>16384)&&(s+=pe.apply(null,e),e.length=0)}return s}}var 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this.eat(R.braceL)?(this.expect(R.ellipsis),e.argument=this.parseMaybeAssign(),this.expect(R.braceR),this.finishNode(e,"JSXSpreadAttribute")):(e.name=this.jsxParseNamespacedName(),e.value=this.eat(R.eq)?this.jsxParseAttributeValue():null,this.finishNode(e,"JSXAttribute"))},ge.jsxParseOpeningElementAt=function(e,t){var r=this.startNodeAt(e,t);for(r.attributes=[],r.name=this.jsxParseElementName();!this.match(R.slash)&&!this.match(R.jsxTagEnd);)r.attributes.push(this.jsxParseAttribute());return r.selfClosing=this.eat(R.slash),this.expect(R.jsxTagEnd),this.finishNode(r,"JSXOpeningElement")},ge.jsxParseClosingElementAt=function(e,t){var r=this.startNodeAt(e,t);return r.name=this.jsxParseElementName(),this.expect(R.jsxTagEnd),this.finishNode(r,"JSXClosingElement")},ge.jsxParseElementAt=function(e,t){var r=this.startNodeAt(e,t),n=[],i=this.jsxParseOpeningElementAt(e,t),s=null;if(!i.selfClosing){e:for(;;)switch(this.state.type){case 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t=o.getArg(e,"source");if(null!=this.sourceRoot&&(t=o.relative(this.sourceRoot,t)),!this._sources.has(t))return{line:null,column:null,lastColumn:null};t=this._sources.indexOf(t);var r={source:t,originalLine:o.getArg(e,"line"),originalColumn:o.getArg(e,"column")},i=this._findMapping(r,this._originalMappings,"originalLine","originalColumn",o.compareByOriginalPositions,o.getArg(e,"bias",n.GREATEST_LOWER_BOUND));if(i>=0){var s=this._originalMappings[i];if(s.source===r.source)return{line:o.getArg(s,"generatedLine",null),column:o.getArg(s,"generatedColumn",null),lastColumn:o.getArg(s,"lastGeneratedColumn",null)}}return{line:null,column:null,lastColumn:null}},t.BasicSourceMapConsumer=i,a.prototype=Object.create(n.prototype),a.prototype.constructor=n,a.prototype._version=3,Object.defineProperty(a.prototype,"sources",{get:function(){for(var e=[],t=0;t<this._sections.length;t++)for(var r=0;r<this._sections[t].consumer.sources.length;r++)e.push(this._sections[t].consumer.sources[r]);return e}}),a.prototype.originalPositionFor=function(e){var t={generatedLine:o.getArg(e,"line"),generatedColumn:o.getArg(e,"column")},r=u.search(t,this._sections,function(e,t){var r=e.generatedLine-t.generatedOffset.generatedLine;return r?r:e.generatedColumn-t.generatedOffset.generatedColumn}),n=this._sections[r];return n?n.consumer.originalPositionFor({line:t.generatedLine-(n.generatedOffset.generatedLine-1),column:t.generatedColumn-(n.generatedOffset.generatedLine===t.generatedLine?n.generatedOffset.generatedColumn-1:0),bias:e.bias}):{source:null,line:null,column:null,name:null}},a.prototype.hasContentsOfAllSources=function(){return this._sections.every(function(e){return e.consumer.hasContentsOfAllSources()})},a.prototype.sourceContentFor=function(e,t){for(var r=0;r<this._sections.length;r++){var n=this._sections[r],i=n.consumer.sourceContentFor(e,!0);if(i)return i}if(t)return null;throw new Error('"'+e+'" is not in the SourceMap.')},a.prototype.generatedPositionFor=function(e){for(var t=0;t<this._sections.length;t++){var r=this._sections[t];if(r.consumer.sources.indexOf(o.getArg(e,"source"))!==-1){var n=r.consumer.generatedPositionFor(e);if(n){return{line:n.line+(r.generatedOffset.generatedLine-1),column:n.column+(r.generatedOffset.generatedLine===n.line?r.generatedOffset.generatedColumn-1:0)}}}}return{line:null,column:null}},a.prototype._parseMappings=function(e,t){this.__generatedMappings=[],this.__originalMappings=[];for(var r=0;r<this._sections.length;r++)for(var n=this._sections[r],i=n.consumer._generatedMappings,s=0;s<i.length;s++){var a=i[s],u=n.consumer._sources.at(a.source);null!==n.consumer.sourceRoot&&(u=o.join(n.consumer.sourceRoot,u)),this._sources.add(u),u=this._sources.indexOf(u);var l=n.consumer._names.at(a.name);this._names.add(l),l=this._names.indexOf(l);var c={source:u,generatedLine:a.generatedLine+(n.generatedOffset.generatedLine-1),generatedColumn:a.generatedColumn+(n.generatedOffset.generatedLine===a.generatedLine?n.generatedOffset.generatedColumn-1:0),originalLine:a.originalLine,originalColumn:a.originalColumn,name:l};this.__generatedMappings.push(c),"number"==typeof c.originalLine&&this.__originalMappings.push(c)}f(this.__generatedMappings,o.compareByGeneratedPositionsDeflated),f(this.__originalMappings,o.compareByOriginalPositions)},t.IndexedSourceMapConsumer=a},function(e,t,r){"use strict";function n(e,t,r,n,i){this.children=[],this.sourceContents={},this.line=null==e?null:e,this.column=null==t?null:t,this.source=null==r?null:r,this.name=null==i?null:i,this[a]=!0,null!=n&&this.add(n)}var i=r(284).SourceMapGenerator,s=r(61),a="$$$isSourceNode$$$";n.fromStringWithSourceMap=function(e,t,r){function i(e,t){if(null===e||void 0===e.source)a.add(t);else{var i=r?s.join(r,e.source):e.source;a.add(new 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ServiceWorkerMessageEvent:!1,ServiceWorkerRegistration:!1,skipWaiting:!1,WindowClient:!1},atomtest:{advanceClock:!1,fakeClearInterval:!1,fakeClearTimeout:!1,fakeSetInterval:!1,fakeSetTimeout:!1,resetTimeouts:!1,waitsForPromise:!1},embertest:{andThen:!1,click:!1,currentPath:!1,currentRouteName:!1,currentURL:!1,fillIn:!1,find:!1,findWithAssert:!1,keyEvent:!1,pauseTest:!1,resumeTest:!1,triggerEvent:!1,visit:!1},protractor:{$:!1,$$:!1,browser:!1,By:!1,by:!1,DartObject:!1,element:!1,protractor:!1},"shared-node-browser":{clearInterval:!1,clearTimeout:!1,console:!1,setInterval:!1,setTimeout:!1},webextensions:{browser:!1,chrome:!1,opr:!1},greasemonkey:{GM_addStyle:!1,GM_deleteValue:!1,GM_getResourceText:!1,GM_getResourceURL:!1,GM_getValue:!1,GM_info:!1,GM_listValues:!1,GM_log:!1,GM_openInTab:!1,GM_registerMenuCommand:!1,GM_setClipboard:!1,GM_setValue:!1,GM_xmlhttpRequest:!1,unsafeWindow:!1}}},function(e,t){e.exports={75:8490,83:383,107:8490,115:383,181:924,197:8491,383:83,452:453,453:452,455:456,456:455,458:459,459:458,497:498,498:497,837:8126,914:976,917:1013,920:1012,921:8126,922:1008,924:181,928:982,929:1009,931:962,934:981,937:8486,962:931,976:914,977:1012,981:934,982:928,1008:922,1009:929,1012:[920,977],1013:917,7776:7835,7835:7776,8126:[837,921],8486:937,8490:75,8491:197,66560:66600,66561:66601,66562:66602,66563:66603,66564:66604,66565:66605,66566:66606,66567:66607,66568:66608,66569:66609,66570:66610,66571:66611,66572:66612,66573:66613,66574:66614,66575:66615,66576:66616,66577:66617,66578:66618,66579:66619,66580:66620,66581:66621,66582:66622,66583:66623,66584:66624,66585:66625,66586:66626,66587:66627,66588:66628,66589:66629,66590:66630,66591:66631,66592:66632,66593:66633,66594:66634,66595:66635,66596:66636,66597:66637,66598:66638,66599:66639,66600:66560,66601:66561,66602:66562,66603:66563,66604:66564,66605:66565,66606:66566,66607:66567,66608:66568,66609:66569,66610:66570,66611:66571,66612:66572,66613:66573,66614:66574,66615:66575,66616:66576,66617:66577,66618:66578,66619:66579,66620:66580,66621:66581,66622:66582,66623:66583,66624:66584,66625:66585,66626:66586,66627:66587,66628:66588,66629:66589,66630:66590,66631:66591,66632:66592,66633:66593,66634:66594,66635:66595,66636:66596,66637:66597,66638:66598,66639:66599,68736:68800,68737:68801,68738:68802,68739:68803,68740:68804,68741:68805,68742:68806,68743:68807,68744:68808,68745:68809,68746:68810,68747:68811,68748:68812,68749:68813,68750:68814,68751:68815,68752:68816,68753:68817,68754:68818,68755:68819,68756:68820,68757:68821,68758:68822,68759:68823,68760:68824,68761:68825,68762:68826,68763:68827,68764:68828,68765:68829,68766:68830,68767:68831,68768:68832,68769:68833,68770:68834,68771:68835,68772:68836,68773:68837,68774:68838,68775:68839,68776:68840,68777:68841,68778:68842,68779:68843,68780:68844,68781:68845,68782:68846,68783:68847,68784:68848,68785:68849,68786:68850,68800:68736,68801:68737,68802:68738,68803:68739,68804:68740,68805:68741,68806:68742,68807:68743,68808:68744,68809:68745,68810:68746,68811:68747,68812:68748,68813:68749,68814:68750,68815:68751,68816:68752,68817:68753,68818:68754,68819:68755,68820:68756,68821:68757,68822:68758,68823:68759,68824:68760,68825:68761,68826:68762,68827:68763,68828:68764,68829:68765,68830:68766,68831:68767,68832:68768,68833:68769,68834:68770,68835:68771,68836:68772,68837:68773,68838:68774,68839:68775,68840:68776,68841:68777,68842:68778,68843:68779,68844:68780,68845:68781,68846:68782,68847:68783,68848:68784,68849:68785,68850:68786,71840:71872,71841:71873,71842:71874,71843:71875,71844:71876,71845:71877,71846:71878,71847:71879,71848:71880,71849:71881,71850:71882,71851:71883,71852:71884,71853:71885,71854:71886,71855:71887,71856:71888,71857:71889,71858:71890,71859:71891,71860:71892,71861:71893,71862:71894,71863:71895,71864:71896,71865:71897,71866:71898,71867:71899,71868:71900,71869:71901,71870:71902,71871:71903,71872:71840,71873:71841,71874:71842,71875:71843,71876:71844,71877:71845,71878:71846,71879:71847,71880:71848,71881:71849,71882:71850,71883:71851,71884:71852,71885:71853,71886:71854,71887:71855,71888:71856,71889:71857,71890:71858,71891:71859,71892:71860,71893:71861,71894:71862,71895:71863,71896:71864,71897:71865,71898:71866,71899:71867,71900:71868,71901:71869,71902:71870,71903:71871}}]))});
\ No newline at end of file
diff --git a/jooby-assets-rollup/src/main/resources/lib/prim.js b/jooby-assets-rollup/src/main/resources/lib/prim.js
index 74f33b1aee..c60f7953e6 100644
--- a/jooby-assets-rollup/src/main/resources/lib/prim.js
+++ b/jooby-assets-rollup/src/main/resources/lib/prim.js
@@ -1,5 +1,5 @@
 /**
- * prim 0.0.7 Copyright (c) 2012-2013, The Dojo Foundation All Rights Reserved.
+ * prim 1.0.0 Copyright (c) 2012-2016, The Dojo Foundation All Rights Reserved.
  * Available via the MIT or new BSD license.
  * see: http://github.com/requirejs/prim for details
  */
@@ -97,7 +97,10 @@ var prim;
 
                 try {
                     var then = v && v.then;
-                    if (isFunObj(v) && typeof then === 'function') {
+                    if (isFunObj(v) && typeof then === 'function' &&
+                        // if error, keep on error pathway if a promise,
+                        // 2.2.7.2 tests.
+                        prop !== 'e') {
                         f2 = makeFulfill();
                         then.call(v, f2.resolve, f2.reject);
                     } else {
diff --git a/jooby-assets-rollup/src/main/resources/lib/rollup-0.19.1.js b/jooby-assets-rollup/src/main/resources/lib/rollup-0.19.1.js
deleted file mode 100644
index 586cfed5af..0000000000
--- a/jooby-assets-rollup/src/main/resources/lib/rollup-0.19.1.js
+++ /dev/null
@@ -1,6446 +0,0 @@
-/*
-  Rollup.js v0.19.1
-  Sun Oct 11 2015 11:46:46 GMT-0400 (EDT) - commit b8dd8c4b492f0c0d6ec13f94e3407d63f62d0890
-
-  https://github.com/rollup/rollup
-
-  Released under the MIT License.
-*/
-
-(function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-  typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  factory((global.rollup = {}));
-}(this, function (exports) { 'use strict';
-
-  var babelHelpers_toConsumableArray = function (arr) {
-    if (Array.isArray(arr)) {
-      for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
-
-      return arr2;
-    } else {
-      return Array.from(arr);
-    }
-  };
-
-  var babelHelpers_classCallCheck = function (instance, Constructor) {
-    if (!(instance instanceof Constructor)) {
-      throw new TypeError("Cannot call a class as a function");
-    }
-  };
-
-  // TODO does this all work on windows?
-
-  var absolutePath = /^(?:\/|(?:[A-Za-z]:)?[\\|\/])/;
-
-  function isAbsolute(path) {
-    return absolutePath.test(path);
-  }
-
-  function _basename(path) {
-    return path.split(/(\/|\\)/).pop();
-  }
-
-  function dirname(path) {
-    var match = /(\/|\\)[^\/\\]*$/.exec(path);
-    if (!match) return '.';
-
-    var dir = path.slice(0, -match[0].length);
-
-    // If `dir` is the empty string, we're at root.
-    return dir ? dir : '/';
-  }
-
-  function extname(path) {
-    var match = /\.[^\.]+$/.exec(path);
-    if (!match) return '';
-    return match[0];
-  }
-
-  function resolve() {
-    for (var _len = arguments.length, paths = Array(_len), _key = 0; _key < _len; _key++) {
-      paths[_key] = arguments[_key];
-    }
-
-    var resolvedParts = paths.shift().split(/[\/\\]/);
-
-    paths.forEach(function (path) {
-      if (isAbsolute(path)) {
-        resolvedParts = path.split(/[\/\\]/);
-      } else {
-        var parts = path.split(/[\/\\]/);
-
-        while (parts[0] === '.' || parts[0] === '..') {
-          var part = parts.shift();
-          if (part === '..') {
-            resolvedParts.pop();
-          }
-        }
-
-        resolvedParts.push.apply(resolvedParts, parts);
-      }
-    });
-
-    return resolvedParts.join('/'); // TODO windows...
-  }
-
-  var nope = function (method) {
-    return 'Cannot use fs.' + method + ' inside browser';
-  };
-
-  var readdirSync = nope('readdirSync');
-  var readFileSync = nope('readFileSync');
-  var writeFile = nope('writeFile');
-
-  var keys = Object.keys;
-
-  function blank() {
-    return Object.create(null);
-  }
-
-  // this looks ridiculous, but it prevents sourcemap tooling from mistaking
-  // this for an actual sourceMappingURL
-  var SOURCEMAPPING_URL = 'sourceMa';
-  SOURCEMAPPING_URL += 'ppingURL';
-
-  var SOURCEMAPPING_URL$1 = SOURCEMAPPING_URL;
-
-  var Promise$1 = window.Promise;
-
-  var _btoa;
-
-  if (typeof window !== 'undefined' && typeof window.btoa === 'function') {
-    _btoa = window.btoa;
-  } else if (typeof Buffer === 'function') {
-    _btoa = function (str) {
-      return new Buffer(str).toString('base64');
-    };
-  } else {
-    throw new Error('Unsupported environment: `window.btoa` or `Buffer` should be supported.');
-  }
-
-  var btoa = _btoa;
-
-  var SourceMap = (function () {
-    function SourceMap(properties) {
-      babelHelpers_classCallCheck(this, SourceMap);
-
-      this.version = 3;
-
-      this.file = properties.file;
-      this.sources = properties.sources;
-      this.sourcesContent = properties.sourcesContent;
-      this.names = properties.names;
-      this.mappings = properties.mappings;
-    }
-
-    SourceMap.prototype.toString = function toString() {
-      return JSON.stringify(this);
-    };
-
-    SourceMap.prototype.toUrl = function toUrl() {
-      return 'data:application/json;charset=utf-8;base64,' + btoa(this.toString());
-    };
-
-    return SourceMap;
-  })();
-
-  function guessIndent(code) {
-    var lines = code.split('\n');
-
-    var tabbed = lines.filter(function (line) {
-      return (/^\t+/.test(line)
-      );
-    });
-    var spaced = lines.filter(function (line) {
-      return (/^ {2,}/.test(line)
-      );
-    });
-
-    if (tabbed.length === 0 && spaced.length === 0) {
-      return null;
-    }
-
-    // More lines tabbed than spaced? Assume tabs, and
-    // default to tabs in the case of a tie (or nothing
-    // to go on)
-    if (tabbed.length >= spaced.length) {
-      return '\t';
-    }
-
-    // Otherwise, we need to guess the multiple
-    var min = spaced.reduce(function (previous, current) {
-      var numSpaces = /^ +/.exec(current)[0].length;
-      return Math.min(numSpaces, previous);
-    }, Infinity);
-
-    return new Array(min + 1).join(' ');
-  }
-
-  var charToInteger = {};
-  var integerToChar = {};
-
-  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split('').forEach(function (char, i) {
-    charToInteger[char] = i;
-    integerToChar[i] = char;
-  });
-
-  function decode$1(string) {
-    var result = [],
-        len = string.length,
-        i,
-        hasContinuationBit,
-        shift = 0,
-        value = 0,
-        integer,
-        shouldNegate;
-
-    for (i = 0; i < len; i += 1) {
-      integer = charToInteger[string[i]];
-
-      if (integer === undefined) {
-        throw new Error('Invalid character (' + string[i] + ')');
-      }
-
-      hasContinuationBit = integer & 32;
-
-      integer &= 31;
-      value += integer << shift;
-
-      if (hasContinuationBit) {
-        shift += 5;
-      } else {
-        shouldNegate = value & 1;
-        value >>= 1;
-
-        result.push(shouldNegate ? -value : value);
-
-        // reset
-        value = shift = 0;
-      }
-    }
-
-    return result;
-  }
-
-  function encode$1(value) {
-    var result, i;
-
-    if (typeof value === 'number') {
-      result = encodeInteger(value);
-    } else {
-      result = '';
-      for (i = 0; i < value.length; i += 1) {
-        result += encodeInteger(value[i]);
-      }
-    }
-
-    return result;
-  }
-
-  function encodeInteger(num) {
-    var result = '',
-        clamped;
-
-    if (num < 0) {
-      num = -num << 1 | 1;
-    } else {
-      num <<= 1;
-    }
-
-    do {
-      clamped = num & 31;
-      num >>= 5;
-
-      if (num > 0) {
-        clamped |= 32;
-      }
-
-      result += integerToChar[clamped];
-    } while (num > 0);
-
-    return result;
-  }
-
-  function encodeMappings(original, str, mappings, hires, sourcemapLocations, sourceIndex, offsets, names, nameLocations) {
-    // store locations, for fast lookup
-    var lineStart = 0;
-    var locations = original.split('\n').map(function (line) {
-      var start = lineStart;
-      lineStart += line.length + 1; // +1 for the newline
-
-      return start;
-    });
-
-    var inverseMappings = invert(str, mappings);
-
-    var charOffset = 0;
-    var lines = str.split('\n').map(function (line) {
-      var segments = [];
-
-      var char = undefined; // TODO put these inside loop, once we've determined it's safe to do so transpilation-wise
-      var origin = undefined;
-      var lastOrigin = -1;
-      var location = undefined;
-      var nameIndex = undefined;
-
-      var i = undefined;
-
-      var len = line.length;
-      for (i = 0; i < len; i += 1) {
-        char = i + charOffset;
-        origin = inverseMappings[char];
-
-        nameIndex = -1;
-        location = null;
-
-        // if this character has no mapping, but the last one did,
-        // create a new segment
-        if (! ~origin && ~lastOrigin) {
-          location = getLocation$1(locations, lastOrigin + 1);
-
-          if (lastOrigin + 1 in nameLocations) nameIndex = names.indexOf(nameLocations[lastOrigin + 1]);
-        } else if (~origin && (hires || ~lastOrigin && origin !== lastOrigin + 1 || sourcemapLocations[origin])) {
-          location = getLocation$1(locations, origin);
-        }
-
-        if (location) {
-          segments.push({
-            generatedCodeColumn: i,
-            sourceIndex: sourceIndex,
-            sourceCodeLine: location.line,
-            sourceCodeColumn: location.column,
-            sourceCodeName: nameIndex
-          });
-        }
-
-        lastOrigin = origin;
-      }
-
-      charOffset += line.length + 1;
-      return segments;
-    });
-
-    offsets.sourceIndex = offsets.sourceIndex || 0;
-    offsets.sourceCodeLine = offsets.sourceCodeLine || 0;
-    offsets.sourceCodeColumn = offsets.sourceCodeColumn || 0;
-    offsets.sourceCodeName = offsets.sourceCodeName || 0;
-
-    var encoded = lines.map(function (segments) {
-      var generatedCodeColumn = 0;
-
-      return segments.map(function (segment) {
-        var arr = [segment.generatedCodeColumn - generatedCodeColumn, segment.sourceIndex - offsets.sourceIndex, segment.sourceCodeLine - offsets.sourceCodeLine, segment.sourceCodeColumn - offsets.sourceCodeColumn];
-
-        generatedCodeColumn = segment.generatedCodeColumn;
-        offsets.sourceIndex = segment.sourceIndex;
-        offsets.sourceCodeLine = segment.sourceCodeLine;
-        offsets.sourceCodeColumn = segment.sourceCodeColumn;
-
-        if (~segment.sourceCodeName) {
-          arr.push(segment.sourceCodeName - offsets.sourceCodeName);
-          offsets.sourceCodeName = segment.sourceCodeName;
-        }
-
-        return encode$1(arr);
-      }).join(',');
-    }).join(';');
-
-    return encoded;
-  }
-
-  function invert(str, mappings) {
-    var inverted = new Uint32Array(str.length),
-        i;
-
-    // initialise everything to -1
-    i = str.length;
-    while (i--) {
-      inverted[i] = -1;
-    }
-
-    // then apply the actual mappings
-    i = mappings.length;
-    while (i--) {
-      if (~mappings[i]) {
-        inverted[mappings[i]] = i;
-      }
-    }
-
-    return inverted;
-  }
-
-  function getLocation$1(locations, char) {
-    var i;
-
-    i = locations.length;
-    while (i--) {
-      if (locations[i] <= char) {
-        return {
-          line: i,
-          column: char - locations[i]
-        };
-      }
-    }
-
-    throw new Error('Character out of bounds');
-  }
-
-  function getRelativePath(from, to) {
-    var fromParts = from.split(/[\/\\]/);
-    var toParts = to.split(/[\/\\]/);
-
-    fromParts.pop(); // get dirname
-
-    while (fromParts[0] === toParts[0]) {
-      fromParts.shift();
-      toParts.shift();
-    }
-
-    if (fromParts.length) {
-      var i = fromParts.length;
-      while (i--) fromParts[i] = '..';
-    }
-
-    return fromParts.concat(toParts).join('/');
-  }
-
-  var warned = false;
-
-  var MagicString = (function () {
-    function MagicString(string) {
-      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
-      babelHelpers_classCallCheck(this, MagicString);
-
-      this.original = this.str = string;
-      this.mappings = initMappings(string.length);
-
-      this.filename = options.filename;
-      this.indentExclusionRanges = options.indentExclusionRanges;
-
-      this.sourcemapLocations = {};
-      this.nameLocations = {};
-
-      this.indentStr = guessIndent(string);
-    }
-
-    MagicString.prototype.addSourcemapLocation = function addSourcemapLocation(char) {
-      this.sourcemapLocations[char] = true;
-    };
-
-    MagicString.prototype.append = function append(content) {
-      if (typeof content !== 'string') {
-        throw new TypeError('appended content must be a string');
-      }
-
-      this.str += content;
-      return this;
-    };
-
-    MagicString.prototype.clone = function clone() {
-      var clone, i;
-
-      clone = new MagicString(this.original, { filename: this.filename });
-      clone.str = this.str;
-
-      i = clone.mappings.length;
-      while (i--) {
-        clone.mappings[i] = this.mappings[i];
-      }
-
-      if (this.indentExclusionRanges) {
-        clone.indentExclusionRanges = typeof this.indentExclusionRanges[0] === 'number' ? [this.indentExclusionRanges[0], this.indentExclusionRanges[1]] : this.indentExclusionRanges.map(function (_ref) {
-          var start = _ref[0];
-          var end = _ref[1];
-          return [start, end];
-        });
-      }
-
-      Object.keys(this.sourcemapLocations).forEach(function (loc) {
-        clone.sourcemapLocations[loc] = true;
-      });
-
-      return clone;
-    };
-
-    MagicString.prototype.generateMap = function generateMap(options) {
-      var _this = this;
-
-      options = options || {};
-
-      var names = [];
-      Object.keys(this.nameLocations).forEach(function (location) {
-        var name = _this.nameLocations[location];
-        if (! ~names.indexOf(name)) names.push(name);
-      });
-
-      return new SourceMap({
-        file: options.file ? options.file.split(/[\/\\]/).pop() : null,
-        sources: [options.source ? getRelativePath(options.file || '', options.source) : null],
-        sourcesContent: options.includeContent ? [this.original] : [null],
-        names: names,
-        mappings: this.getMappings(options.hires, 0, {}, names)
-      });
-    };
-
-    MagicString.prototype.getIndentString = function getIndentString() {
-      return this.indentStr === null ? '\t' : this.indentStr;
-    };
-
-    MagicString.prototype.getMappings = function getMappings(hires, sourceIndex, offsets, names) {
-      return encodeMappings(this.original, this.str, this.mappings, hires, this.sourcemapLocations, sourceIndex, offsets, names, this.nameLocations);
-    };
-
-    MagicString.prototype.indent = function indent(indentStr, options) {
-      var self = this,
-          mappings = this.mappings,
-          reverseMappings = reverse(mappings, this.str.length),
-          pattern = /^[^\r\n]/gm,
-          match,
-          inserts = [],
-          adjustments,
-          exclusions,
-          lastEnd,
-          i;
-
-      if (typeof indentStr === 'object') {
-        options = indentStr;
-        indentStr = undefined;
-      }
-
-      indentStr = indentStr !== undefined ? indentStr : this.indentStr || '\t';
-
-      if (indentStr === '') return this; // noop
-
-      options = options || {};
-
-      // Process exclusion ranges
-      if (options.exclude) {
-        exclusions = typeof options.exclude[0] === 'number' ? [options.exclude] : options.exclude;
-
-        exclusions = exclusions.map(function (range) {
-          var rangeStart, rangeEnd;
-
-          rangeStart = self.locate(range[0]);
-          rangeEnd = self.locate(range[1]);
-
-          if (rangeStart === null || rangeEnd === null) {
-            throw new Error('Cannot use indices of replaced characters as exclusion ranges');
-          }
-
-          return [rangeStart, rangeEnd];
-        });
-
-        exclusions.sort(function (a, b) {
-          return a[0] - b[0];
-        });
-
-        // check for overlaps
-        lastEnd = -1;
-        exclusions.forEach(function (range) {
-          if (range[0] < lastEnd) {
-            throw new Error('Exclusion ranges cannot overlap');
-          }
-
-          lastEnd = range[1];
-        });
-      }
-
-      var indentStart = options.indentStart !== false;
-
-      if (!exclusions) {
-        this.str = this.str.replace(pattern, function (match, index) {
-          if (!indentStart && index === 0) {
-            return match;
-          }
-
-          inserts.push(index);
-          return indentStr + match;
-        });
-      } else {
-        this.str = this.str.replace(pattern, function (match, index) {
-          if (!indentStart && index === 0 || isExcluded(index - 1)) {
-            return match;
-          }
-
-          inserts.push(index);
-          return indentStr + match;
-        });
-      }
-
-      adjustments = inserts.map(function (index) {
-        var origin;
-
-        do {
-          origin = reverseMappings[index++];
-        } while (! ~origin && index < self.str.length);
-
-        return origin;
-      });
-
-      i = adjustments.length;
-      lastEnd = this.mappings.length;
-      while (i--) {
-        adjust(self.mappings, adjustments[i], lastEnd, (i + 1) * indentStr.length);
-        lastEnd = adjustments[i];
-      }
-
-      return this;
-
-      function isExcluded(index) {
-        var i = exclusions.length,
-            range;
-
-        while (i--) {
-          range = exclusions[i];
-
-          if (range[1] < index) {
-            return false;
-          }
-
-          if (range[0] <= index) {
-            return true;
-          }
-        }
-      }
-    };
-
-    MagicString.prototype.insert = function insert(index, content) {
-      if (typeof content !== 'string') {
-        throw new TypeError('inserted content must be a string');
-      }
-
-      if (index === this.original.length) {
-        this.append(content);
-      } else {
-        var mapped = this.locate(index);
-
-        if (mapped === null) {
-          throw new Error('Cannot insert at replaced character index: ' + index);
-        }
-
-        this.str = this.str.substr(0, mapped) + content + this.str.substr(mapped);
-        adjust(this.mappings, index, this.mappings.length, content.length);
-      }
-
-      return this;
-    };
-
-    // get current location of character in original string
-
-    MagicString.prototype.locate = function locate(character) {
-      var loc;
-
-      if (character < 0 || character > this.mappings.length) {
-        throw new Error('Character is out of bounds');
-      }
-
-      loc = this.mappings[character];
-      return ~loc ? loc : null;
-    };
-
-    MagicString.prototype.locateOrigin = function locateOrigin(character) {
-      var i;
-
-      if (character < 0 || character >= this.str.length) {
-        throw new Error('Character is out of bounds');
-      }
-
-      i = this.mappings.length;
-      while (i--) {
-        if (this.mappings[i] === character) {
-          return i;
-        }
-      }
-
-      return null;
-    };
-
-    MagicString.prototype.overwrite = function overwrite(start, end, content, storeName) {
-      if (typeof content !== 'string') {
-        throw new TypeError('replacement content must be a string');
-      }
-
-      var firstChar, lastChar, d;
-
-      firstChar = this.locate(start);
-      lastChar = this.locate(end - 1);
-
-      if (firstChar === null || lastChar === null) {
-        throw new Error('Cannot overwrite the same content twice: \'' + this.original.slice(start, end).replace(/\n/g, '\\n') + '\'');
-      }
-
-      if (firstChar > lastChar + 1) {
-        throw new Error('BUG! First character mapped to a position after the last character: ' + '[' + start + ', ' + end + '] -> [' + firstChar + ', ' + (lastChar + 1) + ']');
-      }
-
-      if (storeName) {
-        this.nameLocations[start] = this.original.slice(start, end);
-      }
-
-      this.str = this.str.substr(0, firstChar) + content + this.str.substring(lastChar + 1);
-
-      d = content.length - (lastChar + 1 - firstChar);
-
-      blank$1(this.mappings, start, end);
-      adjust(this.mappings, end, this.mappings.length, d);
-      return this;
-    };
-
-    MagicString.prototype.prepend = function prepend(content) {
-      this.str = content + this.str;
-      adjust(this.mappings, 0, this.mappings.length, content.length);
-      return this;
-    };
-
-    MagicString.prototype.remove = function remove(start, end) {
-      if (start < 0 || end > this.mappings.length) {
-        throw new Error('Character is out of bounds');
-      }
-
-      var currentStart = -1;
-      var currentEnd = -1;
-      for (var i = start; i < end; i += 1) {
-        var loc = this.mappings[i];
-
-        if (~loc) {
-          if (! ~currentStart) currentStart = loc;
-
-          currentEnd = loc + 1;
-          this.mappings[i] = -1;
-        }
-      }
-
-      this.str = this.str.slice(0, currentStart) + this.str.slice(currentEnd);
-
-      adjust(this.mappings, end, this.mappings.length, currentStart - currentEnd);
-      return this;
-    };
-
-    MagicString.prototype.replace = function replace(start, end, content) {
-      if (!warned) {
-        console.warn('magicString.replace(...) is deprecated. Use magicString.overwrite(...) instead');
-        warned = true;
-      }
-
-      return this.overwrite(start, end, content);
-    };
-
-    MagicString.prototype.slice = function slice(start) {
-      var end = arguments.length <= 1 || arguments[1] === undefined ? this.original.length : arguments[1];
-
-      var firstChar, lastChar;
-
-      while (start < 0) start += this.original.length;
-      while (end < 0) end += this.original.length;
-
-      firstChar = this.locate(start);
-      lastChar = this.locate(end - 1);
-
-      if (firstChar === null || lastChar === null) {
-        throw new Error('Cannot use replaced characters as slice anchors');
-      }
-
-      return this.str.slice(firstChar, lastChar + 1);
-    };
-
-    MagicString.prototype.snip = function snip(start, end) {
-      var clone = this.clone();
-      clone.remove(0, start);
-      clone.remove(end, clone.original.length);
-
-      return clone;
-    };
-
-    MagicString.prototype.toString = function toString() {
-      return this.str;
-    };
-
-    MagicString.prototype.trimLines = function trimLines() {
-      return this.trim('[\\r\\n]');
-    };
-
-    MagicString.prototype.trim = function trim(charType) {
-      return this.trimStart(charType).trimEnd(charType);
-    };
-
-    MagicString.prototype.trimEnd = function trimEnd(charType) {
-      var self = this;
-      var rx = new RegExp((charType || '\\s') + '+$');
-
-      this.str = this.str.replace(rx, function (trailing, index, str) {
-        var strLength = str.length,
-            length = trailing.length,
-            i,
-            chars = [];
-
-        i = strLength;
-        while (i-- > strLength - length) {
-          chars.push(self.locateOrigin(i));
-        }
-
-        i = chars.length;
-        while (i--) {
-          if (chars[i] !== null) {
-            self.mappings[chars[i]] = -1;
-          }
-        }
-
-        return '';
-      });
-
-      return this;
-    };
-
-    MagicString.prototype.trimStart = function trimStart(charType) {
-      var self = this;
-      var rx = new RegExp('^' + (charType || '\\s') + '+');
-
-      this.str = this.str.replace(rx, function (leading) {
-        var length = leading.length,
-            i,
-            chars = [],
-            adjustmentStart = 0;
-
-        i = length;
-        while (i--) {
-          chars.push(self.locateOrigin(i));
-        }
-
-        i = chars.length;
-        while (i--) {
-          if (chars[i] !== null) {
-            self.mappings[chars[i]] = -1;
-            adjustmentStart += 1;
-          }
-        }
-
-        adjust(self.mappings, adjustmentStart, self.mappings.length, -length);
-
-        return '';
-      });
-
-      return this;
-    };
-
-    return MagicString;
-  })();
-
-  function adjust(mappings, start, end, d) {
-    var i = end;
-
-    if (!d) return; // replacement is same length as replaced string
-
-    while (i-- > start) {
-      if (~mappings[i]) {
-        mappings[i] += d;
-      }
-    }
-  }
-
-  function initMappings(i) {
-    var mappings = new Uint32Array(i);
-
-    while (i--) {
-      mappings[i] = i;
-    }
-
-    return mappings;
-  }
-
-  function blank$1(mappings, start, i) {
-    while (i-- > start) {
-      mappings[i] = -1;
-    }
-  }
-
-  function reverse(mappings, i) {
-    var result, location;
-
-    result = new Uint32Array(i);
-
-    while (i--) {
-      result[i] = -1;
-    }
-
-    i = mappings.length;
-    while (i--) {
-      location = mappings[i];
-
-      if (~location) {
-        result[location] = i;
-      }
-    }
-
-    return result;
-  }
-
-  var hasOwnProp = Object.prototype.hasOwnProperty;
-
-  var Bundle$1 = (function () {
-    function Bundle() {
-      var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
-      babelHelpers_classCallCheck(this, Bundle);
-
-      this.intro = options.intro || '';
-      this.outro = options.outro || '';
-      this.separator = options.separator !== undefined ? options.separator : '\n';
-
-      this.sources = [];
-
-      this.uniqueSources = [];
-      this.uniqueSourceIndexByFilename = {};
-    }
-
-    Bundle.prototype.addSource = function addSource(source) {
-      if (source instanceof MagicString) {
-        return this.addSource({
-          content: source,
-          filename: source.filename,
-          separator: this.separator
-        });
-      }
-
-      if (typeof source !== 'object' || !source.content) {
-        throw new Error('bundle.addSource() takes an object with a `content` property, which should be an instance of MagicString, and an optional `filename`');
-      }
-
-      ['filename', 'indentExclusionRanges', 'separator'].forEach(function (option) {
-        if (!hasOwnProp.call(source, option)) source[option] = source.content[option];
-      });
-
-      if (source.separator === undefined) {
-        // TODO there's a bunch of this sort of thing, needs cleaning up
-        source.separator = this.separator;
-      }
-
-      if (source.filename) {
-        if (!hasOwnProp.call(this.uniqueSourceIndexByFilename, source.filename)) {
-          this.uniqueSourceIndexByFilename[source.filename] = this.uniqueSources.length;
-          this.uniqueSources.push({ filename: source.filename, content: source.content.original });
-        } else {
-          var uniqueSource = this.uniqueSources[this.uniqueSourceIndexByFilename[source.filename]];
-          if (source.content.original !== uniqueSource.content) {
-            throw new Error('Illegal source: same filename (' + source.filename + '), different contents');
-          }
-        }
-      }
-
-      this.sources.push(source);
-      return this;
-    };
-
-    Bundle.prototype.append = function append(str, options) {
-      this.addSource({
-        content: new MagicString(str),
-        separator: options && options.separator || ''
-      });
-
-      return this;
-    };
-
-    Bundle.prototype.clone = function clone() {
-      var bundle = new Bundle({
-        intro: this.intro,
-        outro: this.outro,
-        separator: this.separator
-      });
-
-      this.sources.forEach(function (source) {
-        bundle.addSource({
-          filename: source.filename,
-          content: source.content.clone(),
-          separator: source.separator
-        });
-      });
-
-      return bundle;
-    };
-
-    Bundle.prototype.generateMap = function generateMap(options) {
-      var _this = this;
-
-      var offsets = {};
-
-      var names = [];
-      this.sources.forEach(function (source) {
-        Object.keys(source.content.nameLocations).forEach(function (location) {
-          var name = source.content.nameLocations[location];
-          if (! ~names.indexOf(name)) names.push(name);
-        });
-      });
-
-      var encoded = getSemis(this.intro) + this.sources.map(function (source, i) {
-        var prefix = i > 0 ? getSemis(source.separator) || ',' : '';
-        var mappings = undefined;
-
-        // we don't bother encoding sources without a filename
-        if (!source.filename) {
-          mappings = getSemis(source.content.toString());
-        } else {
-          var sourceIndex = _this.uniqueSourceIndexByFilename[source.filename];
-          mappings = source.content.getMappings(options.hires, sourceIndex, offsets, names);
-        }
-
-        return prefix + mappings;
-      }).join('') + getSemis(this.outro);
-
-      return new SourceMap({
-        file: options.file ? options.file.split(/[\/\\]/).pop() : null,
-        sources: this.uniqueSources.map(function (source) {
-          return options.file ? getRelativePath(options.file, source.filename) : source.filename;
-        }),
-        sourcesContent: this.uniqueSources.map(function (source) {
-          return options.includeContent ? source.content : null;
-        }),
-        names: names,
-        mappings: encoded
-      });
-    };
-
-    Bundle.prototype.getIndentString = function getIndentString() {
-      var indentStringCounts = {};
-
-      this.sources.forEach(function (source) {
-        var indentStr = source.content.indentStr;
-
-        if (indentStr === null) return;
-
-        if (!indentStringCounts[indentStr]) indentStringCounts[indentStr] = 0;
-        indentStringCounts[indentStr] += 1;
-      });
-
-      return Object.keys(indentStringCounts).sort(function (a, b) {
-        return indentStringCounts[a] - indentStringCounts[b];
-      })[0] || '\t';
-    };
-
-    Bundle.prototype.indent = function indent(indentStr) {
-      var _this2 = this;
-
-      if (!arguments.length) {
-        indentStr = this.getIndentString();
-      }
-
-      if (indentStr === '') return this; // noop
-
-      var trailingNewline = !this.intro || this.intro.slice(-1) === '\n';
-
-      this.sources.forEach(function (source, i) {
-        var separator = source.separator !== undefined ? source.separator : _this2.separator;
-        var indentStart = trailingNewline || i > 0 && /\r?\n$/.test(separator);
-
-        source.content.indent(indentStr, {
-          exclude: source.indentExclusionRanges,
-          indentStart: indentStart //: trailingNewline || /\r?\n$/.test( separator )  //true///\r?\n/.test( separator )
-        });
-
-        trailingNewline = source.content.str.slice(0, -1) === '\n';
-      });
-
-      if (this.intro) {
-        this.intro = indentStr + this.intro.replace(/^[^\n]/gm, function (match, index) {
-          return index > 0 ? indentStr + match : match;
-        });
-      }
-
-      this.outro = this.outro.replace(/^[^\n]/gm, indentStr + '$&');
-
-      return this;
-    };
-
-    Bundle.prototype.prepend = function prepend(str) {
-      this.intro = str + this.intro;
-      return this;
-    };
-
-    Bundle.prototype.toString = function toString() {
-      var _this3 = this;
-
-      var body = this.sources.map(function (source, i) {
-        var separator = source.separator !== undefined ? source.separator : _this3.separator;
-        var str = (i > 0 ? separator : '') + source.content.toString();
-
-        return str;
-      }).join('');
-
-      return this.intro + body + this.outro;
-    };
-
-    Bundle.prototype.trimLines = function trimLines() {
-      return this.trim('[\\r\\n]');
-    };
-
-    Bundle.prototype.trim = function trim(charType) {
-      return this.trimStart(charType).trimEnd(charType);
-    };
-
-    Bundle.prototype.trimStart = function trimStart(charType) {
-      var rx = new RegExp('^' + (charType || '\\s') + '+');
-      this.intro = this.intro.replace(rx, '');
-
-      if (!this.intro) {
-        var source = undefined; // TODO put inside loop if safe
-        var i = 0;
-
-        do {
-          source = this.sources[i];
-
-          if (!source) {
-            this.outro = this.outro.replace(rx, '');
-            break;
-          }
-
-          source.content.trimStart();
-          i += 1;
-        } while (source.content.str === '');
-      }
-
-      return this;
-    };
-
-    Bundle.prototype.trimEnd = function trimEnd(charType) {
-      var rx = new RegExp((charType || '\\s') + '+$');
-      this.outro = this.outro.replace(rx, '');
-
-      if (!this.outro) {
-        var source = undefined;
-        var i = this.sources.length - 1;
-
-        do {
-          source = this.sources[i];
-
-          if (!source) {
-            this.intro = this.intro.replace(rx, '');
-            break;
-          }
-
-          source.content.trimEnd(charType);
-          i -= 1;
-        } while (source.content.str === '');
-      }
-
-      return this;
-    };
-
-    return Bundle;
-  })();
-
-  function getSemis(str) {
-    return new Array(str.split('\n').length).join(';');
-  }
-
-  MagicString.Bundle = Bundle$1;
-
-  // Return the first non-falsy result from an array of
-  // maybe-sync, maybe-promise-returning functions
-
-  function first$1(candidates) {
-    return function () {
-      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
-        args[_key] = arguments[_key];
-      }
-
-      return candidates.reduce(function (promise, candidate) {
-        return promise.then(function (result) {
-          return result != null ? result : Promise.resolve(candidate.apply(undefined, args));
-        });
-      }, Promise.resolve());
-    };
-  }
-
-  // This is a trick taken from Esprima. It turns out that, on
-  // non-Chrome browsers, to check whether a string is in a set, a
-  // predicate containing a big ugly `switch` statement is faster than
-  // a regular expression, and on Chrome the two are about on par.
-  // This function uses `eval` (non-lexical) to produce such a
-  // predicate from a space-separated string of words.
-  //
-  // It starts by sorting the words by length.
-
-  function makePredicate(words) {
-    words = words.split(" ");
-    var f = "",
-        cats = [];
-    out: for (var i = 0; i < words.length; ++i) {
-      for (var j = 0; j < cats.length; ++j) {
-        if (cats[j][0].length == words[i].length) {
-          cats[j].push(words[i]);
-          continue out;
-        }
-      }cats.push([words[i]]);
-    }
-    function compareTo(arr) {
-      if (arr.length == 1) return f += "return str === " + JSON.stringify(arr[0]) + ";";
-      f += "switch(str){";
-      for (var i = 0; i < arr.length; ++i) {
-        f += "case " + JSON.stringify(arr[i]) + ":";
-      }f += "return true}return false;";
-    }
-
-    // When there are more than three length categories, an outer
-    // switch first dispatches on the lengths, to save on comparisons.
-
-    if (cats.length > 3) {
-      cats.sort(function (a, b) {
-        return b.length - a.length;
-      });
-      f += "switch(str.length){";
-      for (var i = 0; i < cats.length; ++i) {
-        var cat = cats[i];
-        f += "case " + cat[0].length + ":";
-        compareTo(cat);
-      }
-      f += "}";
-
-      // Otherwise, simply generate a flat `switch` statement.
-    } else {
-        compareTo(words);
-      }
-    return new Function("str", f);
-  }
-
-  // Reserved word lists for various dialects of the language
-
-  var reservedWords$1 = {
-    3: makePredicate("abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile"),
-    5: makePredicate("class enum extends super const export import"),
-    6: makePredicate("enum await"),
-    strict: makePredicate("implements interface let package private protected public static yield"),
-    strictBind: makePredicate("eval arguments")
-  };
-
-  // And the keywords
-
-  var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
-
-  var keywords = {
-    5: makePredicate(ecma5AndLessKeywords),
-    6: makePredicate(ecma5AndLessKeywords + " let const class extends export import yield super")
-  };
-
-  // ## Character categories
-
-  // Big ugly regular expressions that match characters in the
-  // whitespace, identifier, and identifier-start categories. These
-  // are only applied when a character is found to actually have a
-  // code point above 128.
-  // Generated by `tools/generate-identifier-regex.js`.
-
-  var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b2\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua7ad\ua7b0\ua7b1\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab5f\uab64\uab65\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
-  var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08e4-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19b0-\u19c0\u19c8\u19c9\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfc-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2d\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
-
-  var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
-  var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
-
-  nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
-
-  // These are a run-length and offset encoded representation of the
-  // >0xffff code points that are a valid part of identifiers. The
-  // offset starts at 0x10000, and each pair of numbers represents an
-  // offset to the next range, and then a size of the range. They were
-  // generated by tools/generate-identifier-regex.js
-  var astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 17, 26, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 99, 39, 9, 51, 157, 310, 10, 21, 11, 7, 153, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 98, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 26, 45, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 955, 52, 76, 44, 33, 24, 27, 35, 42, 34, 4, 0, 13, 47, 15, 3, 22, 0, 38, 17, 2, 24, 133, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 32, 4, 287, 47, 21, 1, 2, 0, 185, 46, 82, 47, 21, 0, 60, 42, 502, 63, 32, 0, 449, 56, 1288, 920, 104, 110, 2962, 1070, 13266, 568, 8, 30, 114, 29, 19, 47, 17, 3, 32, 20, 6, 18, 881, 68, 12, 0, 67, 12, 16481, 1, 3071, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 4149, 196, 1340, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42710, 42, 4148, 12, 221, 16355, 541];
-  var astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 1306, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 9, 7, 2, 37, 13, 2, 9, 52, 0, 13, 2, 49, 13, 16, 9, 83, 11, 168, 11, 6, 9, 8, 2, 57, 0, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 316, 19, 13, 9, 214, 6, 3, 8, 112, 16, 16, 9, 82, 12, 9, 9, 535, 9, 20855, 9, 135, 4, 60, 6, 26, 9, 1016, 45, 17, 3, 19723, 1, 5319, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 4305, 6, 792618, 239];
-
-  // This has a complexity linear to the value of the code. The
-  // assumption is that looking up astral identifier characters is
-  // rare.
-  function isInAstralSet(code, set) {
-    var pos = 0x10000;
-    for (var i = 0; i < set.length; i += 2) {
-      pos += set[i];
-      if (pos > code) return false;
-      pos += set[i + 1];
-      if (pos >= code) return true;
-    }
-  }
-
-  // Test whether a given character code starts an identifier.
-
-  function isIdentifierStart(code, astral) {
-    if (code < 65) return code === 36;
-    if (code < 91) return true;
-    if (code < 97) return code === 95;
-    if (code < 123) return true;
-    if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code));
-    if (astral === false) return false;
-    return isInAstralSet(code, astralIdentifierStartCodes);
-  }
-
-  // Test whether a given character is part of an identifier.
-
-  function isIdentifierChar(code, astral) {
-    if (code < 48) return code === 36;
-    if (code < 58) return true;
-    if (code < 65) return false;
-    if (code < 91) return true;
-    if (code < 97) return code === 95;
-    if (code < 123) return true;
-    if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code));
-    if (astral === false) return false;
-    return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes);
-  }
-
-  // ## Token types
-
-  // The assignment of fine-grained, information-carrying type objects
-  // allows the tokenizer to store the information it has about a
-  // token in a way that is very cheap for the parser to look up.
-
-  // All token type variables start with an underscore, to make them
-  // easy to recognize.
-
-  // The `beforeExpr` property is used to disambiguate between regular
-  // expressions and divisions. It is set on all token types that can
-  // be followed by an expression (thus, a slash after them would be a
-  // regular expression).
-  //
-  // `isLoop` marks a keyword as starting a loop, which is important
-  // to know when parsing a label, in order to allow or disallow
-  // continue jumps to that label.
-
-  var TokenType = function TokenType(label) {
-    var conf = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
-    babelHelpers_classCallCheck(this, TokenType);
-
-    this.label = label;
-    this.keyword = conf.keyword;
-    this.beforeExpr = !!conf.beforeExpr;
-    this.startsExpr = !!conf.startsExpr;
-    this.isLoop = !!conf.isLoop;
-    this.isAssign = !!conf.isAssign;
-    this.prefix = !!conf.prefix;
-    this.postfix = !!conf.postfix;
-    this.binop = conf.binop || null;
-    this.updateContext = null;
-  };
-
-  function binop(name, prec) {
-    return new TokenType(name, { beforeExpr: true, binop: prec });
-  }
-  var beforeExpr = { beforeExpr: true };
-  var startsExpr = { startsExpr: true };
-  var tt = {
-    num: new TokenType("num", startsExpr),
-    regexp: new TokenType("regexp", startsExpr),
-    string: new TokenType("string", startsExpr),
-    name: new TokenType("name", startsExpr),
-    eof: new TokenType("eof"),
-
-    // Punctuation token types.
-    bracketL: new TokenType("[", { beforeExpr: true, startsExpr: true }),
-    bracketR: new TokenType("]"),
-    braceL: new TokenType("{", { beforeExpr: true, startsExpr: true }),
-    braceR: new TokenType("}"),
-    parenL: new TokenType("(", { beforeExpr: true, startsExpr: true }),
-    parenR: new TokenType(")"),
-    comma: new TokenType(",", beforeExpr),
-    semi: new TokenType(";", beforeExpr),
-    colon: new TokenType(":", beforeExpr),
-    dot: new TokenType("."),
-    question: new TokenType("?", beforeExpr),
-    arrow: new TokenType("=>", beforeExpr),
-    template: new TokenType("template"),
-    ellipsis: new TokenType("...", beforeExpr),
-    backQuote: new TokenType("`", startsExpr),
-    dollarBraceL: new TokenType("${", { beforeExpr: true, startsExpr: true }),
-
-    // Operators. These carry several kinds of properties to help the
-    // parser use them properly (the presence of these properties is
-    // what categorizes them as operators).
-    //
-    // `binop`, when present, specifies that this operator is a binary
-    // operator, and will refer to its precedence.
-    //
-    // `prefix` and `postfix` mark the operator as a prefix or postfix
-    // unary operator.
-    //
-    // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
-    // binary operators with a very low precedence, that should result
-    // in AssignmentExpression nodes.
-
-    eq: new TokenType("=", { beforeExpr: true, isAssign: true }),
-    assign: new TokenType("_=", { beforeExpr: true, isAssign: true }),
-    incDec: new TokenType("++/--", { prefix: true, postfix: true, startsExpr: true }),
-    prefix: new TokenType("prefix", { beforeExpr: true, prefix: true, startsExpr: true }),
-    logicalOR: binop("||", 1),
-    logicalAND: binop("&&", 2),
-    bitwiseOR: binop("|", 3),
-    bitwiseXOR: binop("^", 4),
-    bitwiseAND: binop("&", 5),
-    equality: binop("==/!=", 6),
-    relational: binop("</>", 7),
-    bitShift: binop("<</>>", 8),
-    plusMin: new TokenType("+/-", { beforeExpr: true, binop: 9, prefix: true, startsExpr: true }),
-    modulo: binop("%", 10),
-    star: binop("*", 10),
-    slash: binop("/", 10)
-  };
-
-  // Map keyword names to token types.
-
-  var keywordTypes = {};
-
-  // Succinct definitions of keyword token types
-  function kw(name) {
-    var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
-
-    options.keyword = name;
-    keywordTypes[name] = tt["_" + name] = new TokenType(name, options);
-  }
-
-  kw("break");
-  kw("case", beforeExpr);
-  kw("catch");
-  kw("continue");
-  kw("debugger");
-  kw("default", beforeExpr);
-  kw("do", { isLoop: true });
-  kw("else", beforeExpr);
-  kw("finally");
-  kw("for", { isLoop: true });
-  kw("function", startsExpr);
-  kw("if");
-  kw("return", beforeExpr);
-  kw("switch");
-  kw("throw", beforeExpr);
-  kw("try");
-  kw("var");
-  kw("let");
-  kw("const");
-  kw("while", { isLoop: true });
-  kw("with");
-  kw("new", { beforeExpr: true, startsExpr: true });
-  kw("this", startsExpr);
-  kw("super", startsExpr);
-  kw("class");
-  kw("extends", beforeExpr);
-  kw("export");
-  kw("import");
-  kw("yield", { beforeExpr: true, startsExpr: true });
-  kw("null", startsExpr);
-  kw("true", startsExpr);
-  kw("false", startsExpr);
-  kw("in", { beforeExpr: true, binop: 7 });
-  kw("instanceof", { beforeExpr: true, binop: 7 });
-  kw("typeof", { beforeExpr: true, prefix: true, startsExpr: true });
-  kw("void", { beforeExpr: true, prefix: true, startsExpr: true });
-  kw("delete", { beforeExpr: true, prefix: true, startsExpr: true });
-
-  // Matches a whole line break (where CRLF is considered a single
-  // line break). Used to count lines.
-
-  var lineBreak = /\r\n?|\n|\u2028|\u2029/;
-  var lineBreakG = new RegExp(lineBreak.source, "g");
-
-  function isNewLine(code) {
-    return code === 10 || code === 13 || code === 0x2028 || code == 0x2029;
-  }
-
-  var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
-
-  function isArray$1(obj) {
-    return Object.prototype.toString.call(obj) === "[object Array]";
-  }
-
-  // Checks if an object has a property.
-
-  function has(obj, propName) {
-    return Object.prototype.hasOwnProperty.call(obj, propName);
-  }
-
-  // These are used when `options.locations` is on, for the
-  // `startLoc` and `endLoc` properties.
-
-  var Position = (function () {
-    function Position(line, col) {
-      babelHelpers_classCallCheck(this, Position);
-
-      this.line = line;
-      this.column = col;
-    }
-
-    Position.prototype.offset = function offset(n) {
-      return new Position(this.line, this.column + n);
-    };
-
-    return Position;
-  })();
-
-  var SourceLocation = function SourceLocation(p, start, end) {
-    babelHelpers_classCallCheck(this, SourceLocation);
-
-    this.start = start;
-    this.end = end;
-    if (p.sourceFile !== null) this.source = p.sourceFile;
-  }
-
-  // The `getLineInfo` function is mostly useful when the
-  // `locations` option is off (for performance reasons) and you
-  // want to find the line/column position for a given character
-  // offset. `input` should be the code string that the offset refers
-  // into.
-
-  ;
-
-  function getLineInfo(input, offset) {
-    for (var line = 1, cur = 0;;) {
-      lineBreakG.lastIndex = cur;
-      var match = lineBreakG.exec(input);
-      if (match && match.index < offset) {
-        ++line;
-        cur = match.index + match[0].length;
-      } else {
-        return new Position(line, offset - cur);
-      }
-    }
-  }
-
-  // A second optional argument can be given to further configure
-  // the parser process. These options are recognized:
-
-  var defaultOptions = {
-    // `ecmaVersion` indicates the ECMAScript version to parse. Must
-    // be either 3, or 5, or 6. This influences support for strict
-    // mode, the set of reserved words, support for getters and
-    // setters and other features.
-    ecmaVersion: 5,
-    // Source type ("script" or "module") for different semantics
-    sourceType: "script",
-    // `onInsertedSemicolon` can be a callback that will be called
-    // when a semicolon is automatically inserted. It will be passed
-    // th position of the comma as an offset, and if `locations` is
-    // enabled, it is given the location as a `{line, column}` object
-    // as second argument.
-    onInsertedSemicolon: null,
-    // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
-    // trailing commas.
-    onTrailingComma: null,
-    // By default, reserved words are not enforced. Disable
-    // `allowReserved` to enforce them. When this option has the
-    // value "never", reserved words and keywords can also not be
-    // used as property names.
-    allowReserved: true,
-    // When enabled, a return at the top level is not considered an
-    // error.
-    allowReturnOutsideFunction: false,
-    // When enabled, import/export statements are not constrained to
-    // appearing at the top of the program.
-    allowImportExportEverywhere: false,
-    // When enabled, hashbang directive in the beginning of file
-    // is allowed and treated as a line comment.
-    allowHashBang: false,
-    // When `locations` is on, `loc` properties holding objects with
-    // `start` and `end` properties in `{line, column}` form (with
-    // line being 1-based and column 0-based) will be attached to the
-    // nodes.
-    locations: false,
-    // A function can be passed as `onToken` option, which will
-    // cause Acorn to call that function with object in the same
-    // format as tokenize() returns. Note that you are not
-    // allowed to call the parser from the callback—that will
-    // corrupt its internal state.
-    onToken: null,
-    // A function can be passed as `onComment` option, which will
-    // cause Acorn to call that function with `(block, text, start,
-    // end)` parameters whenever a comment is skipped. `block` is a
-    // boolean indicating whether this is a block (`/* */`) comment,
-    // `text` is the content of the comment, and `start` and `end` are
-    // character offsets that denote the start and end of the comment.
-    // When the `locations` option is on, two more parameters are
-    // passed, the full `{line, column}` locations of the start and
-    // end of the comments. Note that you are not allowed to call the
-    // parser from the callback—that will corrupt its internal state.
-    onComment: null,
-    // Nodes have their start and end characters offsets recorded in
-    // `start` and `end` properties (directly on the node, rather than
-    // the `loc` object, which holds line/column data. To also add a
-    // [semi-standardized][range] `range` property holding a `[start,
-    // end]` array with the same numbers, set the `ranges` option to
-    // `true`.
-    //
-    // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
-    ranges: false,
-    // It is possible to parse multiple files into a single AST by
-    // passing the tree produced by parsing the first file as
-    // `program` option in subsequent parses. This will add the
-    // toplevel forms of the parsed file to the `Program` (top) node
-    // of an existing parse tree.
-    program: null,
-    // When `locations` is on, you can pass this to record the source
-    // file in every node's `loc` object.
-    sourceFile: null,
-    // This value, if given, is stored in every node, whether
-    // `locations` is on or off.
-    directSourceFile: null,
-    // When enabled, parenthesized expressions are represented by
-    // (non-standard) ParenthesizedExpression nodes
-    preserveParens: false,
-    plugins: {}
-  };
-
-  // Interpret and default an options object
-
-  function getOptions(opts) {
-    var options = {};
-    for (var opt in defaultOptions) {
-      options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt];
-    }if (isArray$1(options.onToken)) {
-      (function () {
-        var tokens = options.onToken;
-        options.onToken = function (token) {
-          return tokens.push(token);
-        };
-      })();
-    }
-    if (isArray$1(options.onComment)) options.onComment = pushComment(options, options.onComment);
-
-    return options;
-  }
-
-  function pushComment(options, array) {
-    return function (block, text, start, end, startLoc, endLoc) {
-      var comment = {
-        type: block ? 'Block' : 'Line',
-        value: text,
-        start: start,
-        end: end
-      };
-      if (options.locations) comment.loc = new SourceLocation(this, startLoc, endLoc);
-      if (options.ranges) comment.range = [start, end];
-      array.push(comment);
-    };
-  }
-
-  // Registered plugins
-  var plugins = {};
-
-  var Parser = (function () {
-    function Parser(options, input, startPos) {
-      babelHelpers_classCallCheck(this, Parser);
-
-      this.options = getOptions(options);
-      this.sourceFile = this.options.sourceFile;
-      this.isKeyword = keywords[this.options.ecmaVersion >= 6 ? 6 : 5];
-      this.isReservedWord = reservedWords$1[this.options.ecmaVersion];
-      this.input = String(input);
-
-      // Used to signal to callers of `readWord1` whether the word
-      // contained any escape sequences. This is needed because words with
-      // escape sequences must not be interpreted as keywords.
-      this.containsEsc = false;
-
-      // Load plugins
-      this.loadPlugins(this.options.plugins);
-
-      // Set up token state
-
-      // The current position of the tokenizer in the input.
-      if (startPos) {
-        this.pos = startPos;
-        this.lineStart = Math.max(0, this.input.lastIndexOf("\n", startPos));
-        this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
-      } else {
-        this.pos = this.lineStart = 0;
-        this.curLine = 1;
-      }
-
-      // Properties of the current token:
-      // Its type
-      this.type = tt.eof;
-      // For tokens that include more information than their type, the value
-      this.value = null;
-      // Its start and end offset
-      this.start = this.end = this.pos;
-      // And, if locations are used, the {line, column} object
-      // corresponding to those offsets
-      this.startLoc = this.endLoc = this.curPosition();
-
-      // Position information for the previous token
-      this.lastTokEndLoc = this.lastTokStartLoc = null;
-      this.lastTokStart = this.lastTokEnd = this.pos;
-
-      // The context stack is used to superficially track syntactic
-      // context to predict whether a regular expression is allowed in a
-      // given position.
-      this.context = this.initialContext();
-      this.exprAllowed = true;
-
-      // Figure out if it's a module code.
-      this.strict = this.inModule = this.options.sourceType === "module";
-
-      // Used to signify the start of a potential arrow function
-      this.potentialArrowAt = -1;
-
-      // Flags to track whether we are in a function, a generator.
-      this.inFunction = this.inGenerator = false;
-      // Labels in scope.
-      this.labels = [];
-
-      // If enabled, skip leading hashbang line.
-      if (this.pos === 0 && this.options.allowHashBang && this.input.slice(0, 2) === '#!') this.skipLineComment(2);
-    }
-
-    Parser.prototype.extend = function extend(name, f) {
-      this[name] = f(this[name]);
-    };
-
-    Parser.prototype.loadPlugins = function loadPlugins(pluginConfigs) {
-      for (var _name in pluginConfigs) {
-        var plugin = plugins[_name];
-        if (!plugin) throw new Error("Plugin '" + _name + "' not found");
-        plugin(this, pluginConfigs[_name]);
-      }
-    };
-
-    Parser.prototype.parse = function parse() {
-      var node = this.options.program || this.startNode();
-      this.nextToken();
-      return this.parseTopLevel(node);
-    };
-
-    return Parser;
-  })();
-
-  var pp = Parser.prototype;
-
-  // ## Parser utilities
-
-  // Test whether a statement node is the string literal `"use strict"`.
-
-  pp.isUseStrict = function (stmt) {
-    return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && stmt.expression.raw.slice(1, -1) === "use strict";
-  };
-
-  // Predicate that tests whether the next token is of the given
-  // type, and if yes, consumes it as a side effect.
-
-  pp.eat = function (type) {
-    if (this.type === type) {
-      this.next();
-      return true;
-    } else {
-      return false;
-    }
-  };
-
-  // Tests whether parsed token is a contextual keyword.
-
-  pp.isContextual = function (name) {
-    return this.type === tt.name && this.value === name;
-  };
-
-  // Consumes contextual keyword if possible.
-
-  pp.eatContextual = function (name) {
-    return this.value === name && this.eat(tt.name);
-  };
-
-  // Asserts that following token is given contextual keyword.
-
-  pp.expectContextual = function (name) {
-    if (!this.eatContextual(name)) this.unexpected();
-  };
-
-  // Test whether a semicolon can be inserted at the current position.
-
-  pp.canInsertSemicolon = function () {
-    return this.type === tt.eof || this.type === tt.braceR || lineBreak.test(this.input.slice(this.lastTokEnd, this.start));
-  };
-
-  pp.insertSemicolon = function () {
-    if (this.canInsertSemicolon()) {
-      if (this.options.onInsertedSemicolon) this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc);
-      return true;
-    }
-  };
-
-  // Consume a semicolon, or, failing that, see if we are allowed to
-  // pretend that there is a semicolon at this position.
-
-  pp.semicolon = function () {
-    if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected();
-  };
-
-  pp.afterTrailingComma = function (tokType) {
-    if (this.type == tokType) {
-      if (this.options.onTrailingComma) this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc);
-      this.next();
-      return true;
-    }
-  };
-
-  // Expect a token of a given type. If found, consume it, otherwise,
-  // raise an unexpected token error.
-
-  pp.expect = function (type) {
-    this.eat(type) || this.unexpected();
-  };
-
-  // Raise an unexpected token error.
-
-  pp.unexpected = function (pos) {
-    this.raise(pos != null ? pos : this.start, "Unexpected token");
-  };
-
-  var pp$1 = Parser.prototype;
-
-  // ### Statement parsing
-
-  // Parse a program. Initializes the parser, reads any number of
-  // statements, and wraps them in a Program node.  Optionally takes a
-  // `program` argument.  If present, the statements will be appended
-  // to its body instead of creating a new node.
-
-  pp$1.parseTopLevel = function (node) {
-    var first = true;
-    if (!node.body) node.body = [];
-    while (this.type !== tt.eof) {
-      var stmt = this.parseStatement(true, true);
-      node.body.push(stmt);
-      if (first) {
-        if (this.isUseStrict(stmt)) this.setStrict(true);
-        first = false;
-      }
-    }
-    this.next();
-    if (this.options.ecmaVersion >= 6) {
-      node.sourceType = this.options.sourceType;
-    }
-    return this.finishNode(node, "Program");
-  };
-
-  var loopLabel = { kind: "loop" };
-  var switchLabel = { kind: "switch" };
-  // Parse a single statement.
-  //
-  // If expecting a statement and finding a slash operator, parse a
-  // regular expression literal. This is to handle cases like
-  // `if (foo) /blah/.exec(foo)`, where looking at the previous token
-  // does not help.
-
-  pp$1.parseStatement = function (declaration, topLevel) {
-    var starttype = this.type,
-        node = this.startNode();
-
-    // Most types of statements are recognized by the keyword they
-    // start with. Many are trivial to parse, some require a bit of
-    // complexity.
-
-    switch (starttype) {
-      case tt._break:case tt._continue:
-        return this.parseBreakContinueStatement(node, starttype.keyword);
-      case tt._debugger:
-        return this.parseDebuggerStatement(node);
-      case tt._do:
-        return this.parseDoStatement(node);
-      case tt._for:
-        return this.parseForStatement(node);
-      case tt._function:
-        if (!declaration && this.options.ecmaVersion >= 6) this.unexpected();
-        return this.parseFunctionStatement(node);
-      case tt._class:
-        if (!declaration) this.unexpected();
-        return this.parseClass(node, true);
-      case tt._if:
-        return this.parseIfStatement(node);
-      case tt._return:
-        return this.parseReturnStatement(node);
-      case tt._switch:
-        return this.parseSwitchStatement(node);
-      case tt._throw:
-        return this.parseThrowStatement(node);
-      case tt._try:
-        return this.parseTryStatement(node);
-      case tt._let:case tt._const:
-        if (!declaration) this.unexpected(); // NOTE: falls through to _var
-      case tt._var:
-        return this.parseVarStatement(node, starttype);
-      case tt._while:
-        return this.parseWhileStatement(node);
-      case tt._with:
-        return this.parseWithStatement(node);
-      case tt.braceL:
-        return this.parseBlock();
-      case tt.semi:
-        return this.parseEmptyStatement(node);
-      case tt._export:
-      case tt._import:
-        if (!this.options.allowImportExportEverywhere) {
-          if (!topLevel) this.raise(this.start, "'import' and 'export' may only appear at the top level");
-          if (!this.inModule) this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'");
-        }
-        return starttype === tt._import ? this.parseImport(node) : this.parseExport(node);
-
-      // If the statement does not start with a statement keyword or a
-      // brace, it's an ExpressionStatement or LabeledStatement. We
-      // simply start parsing an expression, and afterwards, if the
-      // next token is a colon and the expression was a simple
-      // Identifier node, we switch to interpreting it as a label.
-      default:
-        var maybeName = this.value,
-            expr = this.parseExpression();
-        if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon)) return this.parseLabeledStatement(node, maybeName, expr);else return this.parseExpressionStatement(node, expr);
-    }
-  };
-
-  pp$1.parseBreakContinueStatement = function (node, keyword) {
-    var isBreak = keyword == "break";
-    this.next();
-    if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null;else if (this.type !== tt.name) this.unexpected();else {
-      node.label = this.parseIdent();
-      this.semicolon();
-    }
-
-    // Verify that there is an actual destination to break or
-    // continue to.
-    for (var i = 0; i < this.labels.length; ++i) {
-      var lab = this.labels[i];
-      if (node.label == null || lab.name === node.label.name) {
-        if (lab.kind != null && (isBreak || lab.kind === "loop")) break;
-        if (node.label && isBreak) break;
-      }
-    }
-    if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword);
-    return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement");
-  };
-
-  pp$1.parseDebuggerStatement = function (node) {
-    this.next();
-    this.semicolon();
-    return this.finishNode(node, "DebuggerStatement");
-  };
-
-  pp$1.parseDoStatement = function (node) {
-    this.next();
-    this.labels.push(loopLabel);
-    node.body = this.parseStatement(false);
-    this.labels.pop();
-    this.expect(tt._while);
-    node.test = this.parseParenExpression();
-    if (this.options.ecmaVersion >= 6) this.eat(tt.semi);else this.semicolon();
-    return this.finishNode(node, "DoWhileStatement");
-  };
-
-  // Disambiguating between a `for` and a `for`/`in` or `for`/`of`
-  // loop is non-trivial. Basically, we have to parse the init `var`
-  // statement or expression, disallowing the `in` operator (see
-  // the second parameter to `parseExpression`), and then check
-  // whether the next token is `in` or `of`. When there is no init
-  // part (semicolon immediately after the opening parenthesis), it
-  // is a regular `for` loop.
-
-  pp$1.parseForStatement = function (node) {
-    this.next();
-    this.labels.push(loopLabel);
-    this.expect(tt.parenL);
-    if (this.type === tt.semi) return this.parseFor(node, null);
-    if (this.type === tt._var || this.type === tt._let || this.type === tt._const) {
-      var _init = this.startNode(),
-          varKind = this.type;
-      this.next();
-      this.parseVar(_init, true, varKind);
-      this.finishNode(_init, "VariableDeclaration");
-      if ((this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) && _init.declarations.length === 1 && !(varKind !== tt._var && _init.declarations[0].init)) return this.parseForIn(node, _init);
-      return this.parseFor(node, _init);
-    }
-    var refShorthandDefaultPos = { start: 0 };
-    var init = this.parseExpression(true, refShorthandDefaultPos);
-    if (this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of")) {
-      this.toAssignable(init);
-      this.checkLVal(init);
-      return this.parseForIn(node, init);
-    } else if (refShorthandDefaultPos.start) {
-      this.unexpected(refShorthandDefaultPos.start);
-    }
-    return this.parseFor(node, init);
-  };
-
-  pp$1.parseFunctionStatement = function (node) {
-    this.next();
-    return this.parseFunction(node, true);
-  };
-
-  pp$1.parseIfStatement = function (node) {
-    this.next();
-    node.test = this.parseParenExpression();
-    node.consequent = this.parseStatement(false);
-    node.alternate = this.eat(tt._else) ? this.parseStatement(false) : null;
-    return this.finishNode(node, "IfStatement");
-  };
-
-  pp$1.parseReturnStatement = function (node) {
-    if (!this.inFunction && !this.options.allowReturnOutsideFunction) this.raise(this.start, "'return' outside of function");
-    this.next();
-
-    // In `return` (and `break`/`continue`), the keywords with
-    // optional arguments, we eagerly look for a semicolon or the
-    // possibility to insert one.
-
-    if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null;else {
-      node.argument = this.parseExpression();this.semicolon();
-    }
-    return this.finishNode(node, "ReturnStatement");
-  };
-
-  pp$1.parseSwitchStatement = function (node) {
-    this.next();
-    node.discriminant = this.parseParenExpression();
-    node.cases = [];
-    this.expect(tt.braceL);
-    this.labels.push(switchLabel);
-
-    // Statements under must be grouped (by label) in SwitchCase
-    // nodes. `cur` is used to keep the node that we are currently
-    // adding statements to.
-
-    for (var cur, sawDefault = false; this.type != tt.braceR;) {
-      if (this.type === tt._case || this.type === tt._default) {
-        var isCase = this.type === tt._case;
-        if (cur) this.finishNode(cur, "SwitchCase");
-        node.cases.push(cur = this.startNode());
-        cur.consequent = [];
-        this.next();
-        if (isCase) {
-          cur.test = this.parseExpression();
-        } else {
-          if (sawDefault) this.raise(this.lastTokStart, "Multiple default clauses");
-          sawDefault = true;
-          cur.test = null;
-        }
-        this.expect(tt.colon);
-      } else {
-        if (!cur) this.unexpected();
-        cur.consequent.push(this.parseStatement(true));
-      }
-    }
-    if (cur) this.finishNode(cur, "SwitchCase");
-    this.next(); // Closing brace
-    this.labels.pop();
-    return this.finishNode(node, "SwitchStatement");
-  };
-
-  pp$1.parseThrowStatement = function (node) {
-    this.next();
-    if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) this.raise(this.lastTokEnd, "Illegal newline after throw");
-    node.argument = this.parseExpression();
-    this.semicolon();
-    return this.finishNode(node, "ThrowStatement");
-  };
-
-  // Reused empty array added for node fields that are always empty.
-
-  var empty = [];
-
-  pp$1.parseTryStatement = function (node) {
-    this.next();
-    node.block = this.parseBlock();
-    node.handler = null;
-    if (this.type === tt._catch) {
-      var clause = this.startNode();
-      this.next();
-      this.expect(tt.parenL);
-      clause.param = this.parseBindingAtom();
-      this.checkLVal(clause.param, true);
-      this.expect(tt.parenR);
-      clause.guard = null;
-      clause.body = this.parseBlock();
-      node.handler = this.finishNode(clause, "CatchClause");
-    }
-    node.guardedHandlers = empty;
-    node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null;
-    if (!node.handler && !node.finalizer) this.raise(node.start, "Missing catch or finally clause");
-    return this.finishNode(node, "TryStatement");
-  };
-
-  pp$1.parseVarStatement = function (node, kind) {
-    this.next();
-    this.parseVar(node, false, kind);
-    this.semicolon();
-    return this.finishNode(node, "VariableDeclaration");
-  };
-
-  pp$1.parseWhileStatement = function (node) {
-    this.next();
-    node.test = this.parseParenExpression();
-    this.labels.push(loopLabel);
-    node.body = this.parseStatement(false);
-    this.labels.pop();
-    return this.finishNode(node, "WhileStatement");
-  };
-
-  pp$1.parseWithStatement = function (node) {
-    if (this.strict) this.raise(this.start, "'with' in strict mode");
-    this.next();
-    node.object = this.parseParenExpression();
-    node.body = this.parseStatement(false);
-    return this.finishNode(node, "WithStatement");
-  };
-
-  pp$1.parseEmptyStatement = function (node) {
-    this.next();
-    return this.finishNode(node, "EmptyStatement");
-  };
-
-  pp$1.parseLabeledStatement = function (node, maybeName, expr) {
-    for (var i = 0; i < this.labels.length; ++i) {
-      if (this.labels[i].name === maybeName) this.raise(expr.start, "Label '" + maybeName + "' is already declared");
-    }var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null;
-    for (var i = this.labels.length - 1; i >= 0; i--) {
-      var label = this.labels[i];
-      if (label.statementStart == node.start) {
-        label.statementStart = this.start;
-        label.kind = kind;
-      } else break;
-    }
-    this.labels.push({ name: maybeName, kind: kind, statementStart: this.start });
-    node.body = this.parseStatement(true);
-    this.labels.pop();
-    node.label = expr;
-    return this.finishNode(node, "LabeledStatement");
-  };
-
-  pp$1.parseExpressionStatement = function (node, expr) {
-    node.expression = expr;
-    this.semicolon();
-    return this.finishNode(node, "ExpressionStatement");
-  };
-
-  // Parse a semicolon-enclosed block of statements, handling `"use
-  // strict"` declarations when `allowStrict` is true (used for
-  // function bodies).
-
-  pp$1.parseBlock = function (allowStrict) {
-    var node = this.startNode(),
-        first = true,
-        oldStrict = undefined;
-    node.body = [];
-    this.expect(tt.braceL);
-    while (!this.eat(tt.braceR)) {
-      var stmt = this.parseStatement(true);
-      node.body.push(stmt);
-      if (first && allowStrict && this.isUseStrict(stmt)) {
-        oldStrict = this.strict;
-        this.setStrict(this.strict = true);
-      }
-      first = false;
-    }
-    if (oldStrict === false) this.setStrict(false);
-    return this.finishNode(node, "BlockStatement");
-  };
-
-  // Parse a regular `for` loop. The disambiguation code in
-  // `parseStatement` will already have parsed the init statement or
-  // expression.
-
-  pp$1.parseFor = function (node, init) {
-    node.init = init;
-    this.expect(tt.semi);
-    node.test = this.type === tt.semi ? null : this.parseExpression();
-    this.expect(tt.semi);
-    node.update = this.type === tt.parenR ? null : this.parseExpression();
-    this.expect(tt.parenR);
-    node.body = this.parseStatement(false);
-    this.labels.pop();
-    return this.finishNode(node, "ForStatement");
-  };
-
-  // Parse a `for`/`in` and `for`/`of` loop, which are almost
-  // same from parser's perspective.
-
-  pp$1.parseForIn = function (node, init) {
-    var type = this.type === tt._in ? "ForInStatement" : "ForOfStatement";
-    this.next();
-    node.left = init;
-    node.right = this.parseExpression();
-    this.expect(tt.parenR);
-    node.body = this.parseStatement(false);
-    this.labels.pop();
-    return this.finishNode(node, type);
-  };
-
-  // Parse a list of variable declarations.
-
-  pp$1.parseVar = function (node, isFor, kind) {
-    node.declarations = [];
-    node.kind = kind.keyword;
-    for (;;) {
-      var decl = this.startNode();
-      this.parseVarId(decl);
-      if (this.eat(tt.eq)) {
-        decl.init = this.parseMaybeAssign(isFor);
-      } else if (kind === tt._const && !(this.type === tt._in || this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
-        this.unexpected();
-      } else if (decl.id.type != "Identifier" && !(isFor && (this.type === tt._in || this.isContextual("of")))) {
-        this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value");
-      } else {
-        decl.init = null;
-      }
-      node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
-      if (!this.eat(tt.comma)) break;
-    }
-    return node;
-  };
-
-  pp$1.parseVarId = function (decl) {
-    decl.id = this.parseBindingAtom();
-    this.checkLVal(decl.id, true);
-  };
-
-  // Parse a function declaration or literal (depending on the
-  // `isStatement` parameter).
-
-  pp$1.parseFunction = function (node, isStatement, allowExpressionBody) {
-    this.initFunction(node);
-    if (this.options.ecmaVersion >= 6) node.generator = this.eat(tt.star);
-    if (isStatement || this.type === tt.name) node.id = this.parseIdent();
-    this.parseFunctionParams(node);
-    this.parseFunctionBody(node, allowExpressionBody);
-    return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
-  };
-
-  pp$1.parseFunctionParams = function (node) {
-    this.expect(tt.parenL);
-    node.params = this.parseBindingList(tt.parenR, false, false);
-  };
-
-  // Parse a class declaration or literal (depending on the
-  // `isStatement` parameter).
-
-  pp$1.parseClass = function (node, isStatement) {
-    this.next();
-    this.parseClassId(node, isStatement);
-    this.parseClassSuper(node);
-    var classBody = this.startNode();
-    var hadConstructor = false;
-    classBody.body = [];
-    this.expect(tt.braceL);
-    while (!this.eat(tt.braceR)) {
-      if (this.eat(tt.semi)) continue;
-      var method = this.startNode();
-      var isGenerator = this.eat(tt.star);
-      var isMaybeStatic = this.type === tt.name && this.value === "static";
-      this.parsePropertyName(method);
-      method.static = isMaybeStatic && this.type !== tt.parenL;
-      if (method.static) {
-        if (isGenerator) this.unexpected();
-        isGenerator = this.eat(tt.star);
-        this.parsePropertyName(method);
-      }
-      method.kind = "method";
-      var isGetSet = false;
-      if (!method.computed) {
-        var key = method.key;
-
-        if (!isGenerator && key.type === "Identifier" && this.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
-          isGetSet = true;
-          method.kind = key.name;
-          key = this.parsePropertyName(method);
-        }
-        if (!method.static && (key.type === "Identifier" && key.name === "constructor" || key.type === "Literal" && key.value === "constructor")) {
-          if (hadConstructor) this.raise(key.start, "Duplicate constructor in the same class");
-          if (isGetSet) this.raise(key.start, "Constructor can't have get/set modifier");
-          if (isGenerator) this.raise(key.start, "Constructor can't be a generator");
-          method.kind = "constructor";
-          hadConstructor = true;
-        }
-      }
-      this.parseClassMethod(classBody, method, isGenerator);
-      if (isGetSet) {
-        var paramCount = method.kind === "get" ? 0 : 1;
-        if (method.value.params.length !== paramCount) {
-          var start = method.value.start;
-          if (method.kind === "get") this.raise(start, "getter should have no params");else this.raise(start, "setter should have exactly one param");
-        }
-      }
-    }
-    node.body = this.finishNode(classBody, "ClassBody");
-    return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression");
-  };
-
-  pp$1.parseClassMethod = function (classBody, method, isGenerator) {
-    method.value = this.parseMethod(isGenerator);
-    classBody.body.push(this.finishNode(method, "MethodDefinition"));
-  };
-
-  pp$1.parseClassId = function (node, isStatement) {
-    node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null;
-  };
-
-  pp$1.parseClassSuper = function (node) {
-    node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null;
-  };
-
-  // Parses module export declaration.
-
-  pp$1.parseExport = function (node) {
-    this.next();
-    // export * from '...'
-    if (this.eat(tt.star)) {
-      this.expectContextual("from");
-      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
-      this.semicolon();
-      return this.finishNode(node, "ExportAllDeclaration");
-    }
-    if (this.eat(tt._default)) {
-      // export default ...
-      var expr = this.parseMaybeAssign();
-      var needsSemi = true;
-      if (expr.type == "FunctionExpression" || expr.type == "ClassExpression") {
-        needsSemi = false;
-        if (expr.id) {
-          expr.type = expr.type == "FunctionExpression" ? "FunctionDeclaration" : "ClassDeclaration";
-        }
-      }
-      node.declaration = expr;
-      if (needsSemi) this.semicolon();
-      return this.finishNode(node, "ExportDefaultDeclaration");
-    }
-    // export var|const|let|function|class ...
-    if (this.shouldParseExportStatement()) {
-      node.declaration = this.parseStatement(true);
-      node.specifiers = [];
-      node.source = null;
-    } else {
-      // export { x, y as z } [from '...']
-      node.declaration = null;
-      node.specifiers = this.parseExportSpecifiers();
-      if (this.eatContextual("from")) {
-        node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
-      } else {
-        node.source = null;
-      }
-      this.semicolon();
-    }
-    return this.finishNode(node, "ExportNamedDeclaration");
-  };
-
-  pp$1.shouldParseExportStatement = function () {
-    return this.type.keyword;
-  };
-
-  // Parses a comma-separated list of module exports.
-
-  pp$1.parseExportSpecifiers = function () {
-    var nodes = [],
-        first = true;
-    // export { x, y as z } [from '...']
-    this.expect(tt.braceL);
-    while (!this.eat(tt.braceR)) {
-      if (!first) {
-        this.expect(tt.comma);
-        if (this.afterTrailingComma(tt.braceR)) break;
-      } else first = false;
-
-      var node = this.startNode();
-      node.local = this.parseIdent(this.type === tt._default);
-      node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local;
-      nodes.push(this.finishNode(node, "ExportSpecifier"));
-    }
-    return nodes;
-  };
-
-  // Parses import declaration.
-
-  pp$1.parseImport = function (node) {
-    this.next();
-    // import '...'
-    if (this.type === tt.string) {
-      node.specifiers = empty;
-      node.source = this.parseExprAtom();
-    } else {
-      node.specifiers = this.parseImportSpecifiers();
-      this.expectContextual("from");
-      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected();
-    }
-    this.semicolon();
-    return this.finishNode(node, "ImportDeclaration");
-  };
-
-  // Parses a comma-separated list of module imports.
-
-  pp$1.parseImportSpecifiers = function () {
-    var nodes = [],
-        first = true;
-    if (this.type === tt.name) {
-      // import defaultObj, { x, y as z } from '...'
-      var node = this.startNode();
-      node.local = this.parseIdent();
-      this.checkLVal(node.local, true);
-      nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
-      if (!this.eat(tt.comma)) return nodes;
-    }
-    if (this.type === tt.star) {
-      var node = this.startNode();
-      this.next();
-      this.expectContextual("as");
-      node.local = this.parseIdent();
-      this.checkLVal(node.local, true);
-      nodes.push(this.finishNode(node, "ImportNamespaceSpecifier"));
-      return nodes;
-    }
-    this.expect(tt.braceL);
-    while (!this.eat(tt.braceR)) {
-      if (!first) {
-        this.expect(tt.comma);
-        if (this.afterTrailingComma(tt.braceR)) break;
-      } else first = false;
-
-      var node = this.startNode();
-      node.imported = this.parseIdent(true);
-      node.local = this.eatContextual("as") ? this.parseIdent() : node.imported;
-      this.checkLVal(node.local, true);
-      nodes.push(this.finishNode(node, "ImportSpecifier"));
-    }
-    return nodes;
-  };
-
-  var pp$2 = Parser.prototype;
-
-  // Convert existing expression atom to assignable pattern
-  // if possible.
-
-  pp$2.toAssignable = function (node, isBinding) {
-    if (this.options.ecmaVersion >= 6 && node) {
-      switch (node.type) {
-        case "Identifier":
-        case "ObjectPattern":
-        case "ArrayPattern":
-        case "AssignmentPattern":
-          break;
-
-        case "ObjectExpression":
-          node.type = "ObjectPattern";
-          for (var i = 0; i < node.properties.length; i++) {
-            var prop = node.properties[i];
-            if (prop.kind !== "init") this.raise(prop.key.start, "Object pattern can't contain getter or setter");
-            this.toAssignable(prop.value, isBinding);
-          }
-          break;
-
-        case "ArrayExpression":
-          node.type = "ArrayPattern";
-          this.toAssignableList(node.elements, isBinding);
-          break;
-
-        case "AssignmentExpression":
-          if (node.operator === "=") {
-            node.type = "AssignmentPattern";
-            delete node.operator;
-          } else {
-            this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
-          }
-          break;
-
-        case "ParenthesizedExpression":
-          node.expression = this.toAssignable(node.expression, isBinding);
-          break;
-
-        case "MemberExpression":
-          if (!isBinding) break;
-
-        default:
-          this.raise(node.start, "Assigning to rvalue");
-      }
-    }
-    return node;
-  };
-
-  // Convert list of expression atoms to binding list.
-
-  pp$2.toAssignableList = function (exprList, isBinding) {
-    var end = exprList.length;
-    if (end) {
-      var last = exprList[end - 1];
-      if (last && last.type == "RestElement") {
-        --end;
-      } else if (last && last.type == "SpreadElement") {
-        last.type = "RestElement";
-        var arg = last.argument;
-        this.toAssignable(arg, isBinding);
-        if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern") this.unexpected(arg.start);
-        --end;
-      }
-    }
-    for (var i = 0; i < end; i++) {
-      var elt = exprList[i];
-      if (elt) this.toAssignable(elt, isBinding);
-    }
-    return exprList;
-  };
-
-  // Parses spread element.
-
-  pp$2.parseSpread = function (refShorthandDefaultPos) {
-    var node = this.startNode();
-    this.next();
-    node.argument = this.parseMaybeAssign(refShorthandDefaultPos);
-    return this.finishNode(node, "SpreadElement");
-  };
-
-  pp$2.parseRest = function () {
-    var node = this.startNode();
-    this.next();
-    node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected();
-    return this.finishNode(node, "RestElement");
-  };
-
-  // Parses lvalue (assignable) atom.
-
-  pp$2.parseBindingAtom = function () {
-    if (this.options.ecmaVersion < 6) return this.parseIdent();
-    switch (this.type) {
-      case tt.name:
-        return this.parseIdent();
-
-      case tt.bracketL:
-        var node = this.startNode();
-        this.next();
-        node.elements = this.parseBindingList(tt.bracketR, true, true);
-        return this.finishNode(node, "ArrayPattern");
-
-      case tt.braceL:
-        return this.parseObj(true);
-
-      default:
-        this.unexpected();
-    }
-  };
-
-  pp$2.parseBindingList = function (close, allowEmpty, allowTrailingComma) {
-    var elts = [],
-        first = true;
-    while (!this.eat(close)) {
-      if (first) first = false;else this.expect(tt.comma);
-      if (allowEmpty && this.type === tt.comma) {
-        elts.push(null);
-      } else if (allowTrailingComma && this.afterTrailingComma(close)) {
-        break;
-      } else if (this.type === tt.ellipsis) {
-        var rest = this.parseRest();
-        this.parseBindingListItem(rest);
-        elts.push(rest);
-        this.expect(close);
-        break;
-      } else {
-        var elem = this.parseMaybeDefault(this.start, this.startLoc);
-        this.parseBindingListItem(elem);
-        elts.push(elem);
-      }
-    }
-    return elts;
-  };
-
-  pp$2.parseBindingListItem = function (param) {
-    return param;
-  };
-
-  // Parses assignment pattern around given atom if possible.
-
-  pp$2.parseMaybeDefault = function (startPos, startLoc, left) {
-    left = left || this.parseBindingAtom();
-    if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left;
-    var node = this.startNodeAt(startPos, startLoc);
-    node.left = left;
-    node.right = this.parseMaybeAssign();
-    return this.finishNode(node, "AssignmentPattern");
-  };
-
-  // Verify that a node is an lval — something that can be assigned
-  // to.
-
-  pp$2.checkLVal = function (expr, isBinding, checkClashes) {
-    switch (expr.type) {
-      case "Identifier":
-        if (this.strict && (reservedWords$1.strictBind(expr.name) || reservedWords$1.strict(expr.name))) this.raise(expr.start, (isBinding ? "Binding " : "Assigning to ") + expr.name + " in strict mode");
-        if (checkClashes) {
-          if (has(checkClashes, expr.name)) this.raise(expr.start, "Argument name clash in strict mode");
-          checkClashes[expr.name] = true;
-        }
-        break;
-
-      case "MemberExpression":
-        if (isBinding) this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression");
-        break;
-
-      case "ObjectPattern":
-        for (var i = 0; i < expr.properties.length; i++) {
-          this.checkLVal(expr.properties[i].value, isBinding, checkClashes);
-        }break;
-
-      case "ArrayPattern":
-        for (var i = 0; i < expr.elements.length; i++) {
-          var elem = expr.elements[i];
-          if (elem) this.checkLVal(elem, isBinding, checkClashes);
-        }
-        break;
-
-      case "AssignmentPattern":
-        this.checkLVal(expr.left, isBinding, checkClashes);
-        break;
-
-      case "RestElement":
-        this.checkLVal(expr.argument, isBinding, checkClashes);
-        break;
-
-      case "ParenthesizedExpression":
-        this.checkLVal(expr.expression, isBinding, checkClashes);
-        break;
-
-      default:
-        this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue");
-    }
-  };
-
-  var pp$3 = Parser.prototype;
-
-  // Check if property name clashes with already added.
-  // Object/class getters and setters are not allowed to clash —
-  // either with each other or with an init property — and in
-  // strict mode, init properties are also not allowed to be repeated.
-
-  pp$3.checkPropClash = function (prop, propHash) {
-    if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand)) return;
-    var key = prop.key,
-        name = undefined;
-    switch (key.type) {
-      case "Identifier":
-        name = key.name;break;
-      case "Literal":
-        name = String(key.value);break;
-      default:
-        return;
-    }
-    var kind = prop.kind;
-    if (this.options.ecmaVersion >= 6) {
-      if (name === "__proto__" && kind === "init") {
-        if (propHash.proto) this.raise(key.start, "Redefinition of __proto__ property");
-        propHash.proto = true;
-      }
-      return;
-    }
-    var other = undefined;
-    if (has(propHash, name)) {
-      other = propHash[name];
-      var isGetSet = kind !== "init";
-      if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init)) this.raise(key.start, "Redefinition of property");
-    } else {
-      other = propHash[name] = {
-        init: false,
-        get: false,
-        set: false
-      };
-    }
-    other[kind] = true;
-  };
-
-  // ### Expression parsing
-
-  // These nest, from the most general expression type at the top to
-  // 'atomic', nondivisible expression types at the bottom. Most of
-  // the functions will simply let the function(s) below them parse,
-  // and, *if* the syntactic construct they handle is present, wrap
-  // the AST node that the inner parser gave them in another node.
-
-  // Parse a full expression. The optional arguments are used to
-  // forbid the `in` operator (in for loops initalization expressions)
-  // and provide reference for storing '=' operator inside shorthand
-  // property assignment in contexts where both object expression
-  // and object pattern might appear (so it's possible to raise
-  // delayed syntax error at correct position).
-
-  pp$3.parseExpression = function (noIn, refShorthandDefaultPos) {
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    var expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos);
-    if (this.type === tt.comma) {
-      var node = this.startNodeAt(startPos, startLoc);
-      node.expressions = [expr];
-      while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos));
-      return this.finishNode(node, "SequenceExpression");
-    }
-    return expr;
-  };
-
-  // Parse an assignment expression. This includes applications of
-  // operators like `+=`.
-
-  pp$3.parseMaybeAssign = function (noIn, refShorthandDefaultPos, afterLeftParse) {
-    if (this.type == tt._yield && this.inGenerator) return this.parseYield();
-
-    var failOnShorthandAssign = undefined;
-    if (!refShorthandDefaultPos) {
-      refShorthandDefaultPos = { start: 0 };
-      failOnShorthandAssign = true;
-    } else {
-      failOnShorthandAssign = false;
-    }
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    if (this.type == tt.parenL || this.type == tt.name) this.potentialArrowAt = this.start;
-    var left = this.parseMaybeConditional(noIn, refShorthandDefaultPos);
-    if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc);
-    if (this.type.isAssign) {
-      var node = this.startNodeAt(startPos, startLoc);
-      node.operator = this.value;
-      node.left = this.type === tt.eq ? this.toAssignable(left) : left;
-      refShorthandDefaultPos.start = 0; // reset because shorthand default was used correctly
-      this.checkLVal(left);
-      this.next();
-      node.right = this.parseMaybeAssign(noIn);
-      return this.finishNode(node, "AssignmentExpression");
-    } else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
-      this.unexpected(refShorthandDefaultPos.start);
-    }
-    return left;
-  };
-
-  // Parse a ternary conditional (`?:`) operator.
-
-  pp$3.parseMaybeConditional = function (noIn, refShorthandDefaultPos) {
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    var expr = this.parseExprOps(noIn, refShorthandDefaultPos);
-    if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
-    if (this.eat(tt.question)) {
-      var node = this.startNodeAt(startPos, startLoc);
-      node.test = expr;
-      node.consequent = this.parseMaybeAssign();
-      this.expect(tt.colon);
-      node.alternate = this.parseMaybeAssign(noIn);
-      return this.finishNode(node, "ConditionalExpression");
-    }
-    return expr;
-  };
-
-  // Start the precedence parser.
-
-  pp$3.parseExprOps = function (noIn, refShorthandDefaultPos) {
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    var expr = this.parseMaybeUnary(refShorthandDefaultPos);
-    if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
-    return this.parseExprOp(expr, startPos, startLoc, -1, noIn);
-  };
-
-  // Parse binary operators with the operator precedence parsing
-  // algorithm. `left` is the left-hand side of the operator.
-  // `minPrec` provides context that allows the function to stop and
-  // defer further parser to one of its callers when it encounters an
-  // operator that has a lower precedence than the set it is parsing.
-
-  pp$3.parseExprOp = function (left, leftStartPos, leftStartLoc, minPrec, noIn) {
-    var prec = this.type.binop;
-    if (prec != null && (!noIn || this.type !== tt._in)) {
-      if (prec > minPrec) {
-        var node = this.startNodeAt(leftStartPos, leftStartLoc);
-        node.left = left;
-        node.operator = this.value;
-        var op = this.type;
-        this.next();
-        var startPos = this.start,
-            startLoc = this.startLoc;
-        node.right = this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, prec, noIn);
-        this.finishNode(node, op === tt.logicalOR || op === tt.logicalAND ? "LogicalExpression" : "BinaryExpression");
-        return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn);
-      }
-    }
-    return left;
-  };
-
-  // Parse unary operators, both prefix and postfix.
-
-  pp$3.parseMaybeUnary = function (refShorthandDefaultPos) {
-    if (this.type.prefix) {
-      var node = this.startNode(),
-          update = this.type === tt.incDec;
-      node.operator = this.value;
-      node.prefix = true;
-      this.next();
-      node.argument = this.parseMaybeUnary();
-      if (refShorthandDefaultPos && refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start);
-      if (update) this.checkLVal(node.argument);else if (this.strict && node.operator === "delete" && node.argument.type === "Identifier") this.raise(node.start, "Deleting local variable in strict mode");
-      return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
-    }
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    var expr = this.parseExprSubscripts(refShorthandDefaultPos);
-    if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
-    while (this.type.postfix && !this.canInsertSemicolon()) {
-      var node = this.startNodeAt(startPos, startLoc);
-      node.operator = this.value;
-      node.prefix = false;
-      node.argument = expr;
-      this.checkLVal(expr);
-      this.next();
-      expr = this.finishNode(node, "UpdateExpression");
-    }
-    return expr;
-  };
-
-  // Parse call, dot, and `[]`-subscript expressions.
-
-  pp$3.parseExprSubscripts = function (refShorthandDefaultPos) {
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    var expr = this.parseExprAtom(refShorthandDefaultPos);
-    if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
-    return this.parseSubscripts(expr, startPos, startLoc);
-  };
-
-  pp$3.parseSubscripts = function (base, startPos, startLoc, noCalls) {
-    for (;;) {
-      if (this.eat(tt.dot)) {
-        var node = this.startNodeAt(startPos, startLoc);
-        node.object = base;
-        node.property = this.parseIdent(true);
-        node.computed = false;
-        base = this.finishNode(node, "MemberExpression");
-      } else if (this.eat(tt.bracketL)) {
-        var node = this.startNodeAt(startPos, startLoc);
-        node.object = base;
-        node.property = this.parseExpression();
-        node.computed = true;
-        this.expect(tt.bracketR);
-        base = this.finishNode(node, "MemberExpression");
-      } else if (!noCalls && this.eat(tt.parenL)) {
-        var node = this.startNodeAt(startPos, startLoc);
-        node.callee = base;
-        node.arguments = this.parseExprList(tt.parenR, false);
-        base = this.finishNode(node, "CallExpression");
-      } else if (this.type === tt.backQuote) {
-        var node = this.startNodeAt(startPos, startLoc);
-        node.tag = base;
-        node.quasi = this.parseTemplate();
-        base = this.finishNode(node, "TaggedTemplateExpression");
-      } else {
-        return base;
-      }
-    }
-  };
-
-  // Parse an atomic expression — either a single token that is an
-  // expression, an expression started by a keyword like `function` or
-  // `new`, or an expression wrapped in punctuation like `()`, `[]`,
-  // or `{}`.
-
-  pp$3.parseExprAtom = function (refShorthandDefaultPos) {
-    var node = undefined,
-        canBeArrow = this.potentialArrowAt == this.start;
-    switch (this.type) {
-      case tt._super:
-        if (!this.inFunction) this.raise(this.start, "'super' outside of function or class");
-      case tt._this:
-        var type = this.type === tt._this ? "ThisExpression" : "Super";
-        node = this.startNode();
-        this.next();
-        return this.finishNode(node, type);
-
-      case tt._yield:
-        if (this.inGenerator) this.unexpected();
-
-      case tt.name:
-        var startPos = this.start,
-            startLoc = this.startLoc;
-        var id = this.parseIdent(this.type !== tt.name);
-        if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id]);
-        return id;
-
-      case tt.regexp:
-        var value = this.value;
-        node = this.parseLiteral(value.value);
-        node.regex = { pattern: value.pattern, flags: value.flags };
-        return node;
-
-      case tt.num:case tt.string:
-        return this.parseLiteral(this.value);
-
-      case tt._null:case tt._true:case tt._false:
-        node = this.startNode();
-        node.value = this.type === tt._null ? null : this.type === tt._true;
-        node.raw = this.type.keyword;
-        this.next();
-        return this.finishNode(node, "Literal");
-
-      case tt.parenL:
-        return this.parseParenAndDistinguishExpression(canBeArrow);
-
-      case tt.bracketL:
-        node = this.startNode();
-        this.next();
-        // check whether this is array comprehension or regular array
-        if (this.options.ecmaVersion >= 7 && this.type === tt._for) {
-          return this.parseComprehension(node, false);
-        }
-        node.elements = this.parseExprList(tt.bracketR, true, true, refShorthandDefaultPos);
-        return this.finishNode(node, "ArrayExpression");
-
-      case tt.braceL:
-        return this.parseObj(false, refShorthandDefaultPos);
-
-      case tt._function:
-        node = this.startNode();
-        this.next();
-        return this.parseFunction(node, false);
-
-      case tt._class:
-        return this.parseClass(this.startNode(), false);
-
-      case tt._new:
-        return this.parseNew();
-
-      case tt.backQuote:
-        return this.parseTemplate();
-
-      default:
-        this.unexpected();
-    }
-  };
-
-  pp$3.parseLiteral = function (value) {
-    var node = this.startNode();
-    node.value = value;
-    node.raw = this.input.slice(this.start, this.end);
-    this.next();
-    return this.finishNode(node, "Literal");
-  };
-
-  pp$3.parseParenExpression = function () {
-    this.expect(tt.parenL);
-    var val = this.parseExpression();
-    this.expect(tt.parenR);
-    return val;
-  };
-
-  pp$3.parseParenAndDistinguishExpression = function (canBeArrow) {
-    var startPos = this.start,
-        startLoc = this.startLoc,
-        val = undefined;
-    if (this.options.ecmaVersion >= 6) {
-      this.next();
-
-      if (this.options.ecmaVersion >= 7 && this.type === tt._for) {
-        return this.parseComprehension(this.startNodeAt(startPos, startLoc), true);
-      }
-
-      var innerStartPos = this.start,
-          innerStartLoc = this.startLoc;
-      var exprList = [],
-          first = true;
-      var refShorthandDefaultPos = { start: 0 },
-          spreadStart = undefined,
-          innerParenStart = undefined;
-      while (this.type !== tt.parenR) {
-        first ? first = false : this.expect(tt.comma);
-        if (this.type === tt.ellipsis) {
-          spreadStart = this.start;
-          exprList.push(this.parseParenItem(this.parseRest()));
-          break;
-        } else {
-          if (this.type === tt.parenL && !innerParenStart) {
-            innerParenStart = this.start;
-          }
-          exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem));
-        }
-      }
-      var innerEndPos = this.start,
-          innerEndLoc = this.startLoc;
-      this.expect(tt.parenR);
-
-      if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
-        if (innerParenStart) this.unexpected(innerParenStart);
-        return this.parseParenArrowList(startPos, startLoc, exprList);
-      }
-
-      if (!exprList.length) this.unexpected(this.lastTokStart);
-      if (spreadStart) this.unexpected(spreadStart);
-      if (refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start);
-
-      if (exprList.length > 1) {
-        val = this.startNodeAt(innerStartPos, innerStartLoc);
-        val.expressions = exprList;
-        this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
-      } else {
-        val = exprList[0];
-      }
-    } else {
-      val = this.parseParenExpression();
-    }
-
-    if (this.options.preserveParens) {
-      var par = this.startNodeAt(startPos, startLoc);
-      par.expression = val;
-      return this.finishNode(par, "ParenthesizedExpression");
-    } else {
-      return val;
-    }
-  };
-
-  pp$3.parseParenItem = function (item) {
-    return item;
-  };
-
-  pp$3.parseParenArrowList = function (startPos, startLoc, exprList) {
-    return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList);
-  };
-
-  // New's precedence is slightly tricky. It must allow its argument
-  // to be a `[]` or dot subscript expression, but not a call — at
-  // least, not without wrapping it in parentheses. Thus, it uses the
-
-  var empty$1 = [];
-
-  pp$3.parseNew = function () {
-    var node = this.startNode();
-    var meta = this.parseIdent(true);
-    if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
-      node.meta = meta;
-      node.property = this.parseIdent(true);
-      if (node.property.name !== "target") this.raise(node.property.start, "The only valid meta property for new is new.target");
-      return this.finishNode(node, "MetaProperty");
-    }
-    var startPos = this.start,
-        startLoc = this.startLoc;
-    node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
-    if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, false);else node.arguments = empty$1;
-    return this.finishNode(node, "NewExpression");
-  };
-
-  // Parse template expression.
-
-  pp$3.parseTemplateElement = function () {
-    var elem = this.startNode();
-    elem.value = {
-      raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, '\n'),
-      cooked: this.value
-    };
-    this.next();
-    elem.tail = this.type === tt.backQuote;
-    return this.finishNode(elem, "TemplateElement");
-  };
-
-  pp$3.parseTemplate = function () {
-    var node = this.startNode();
-    this.next();
-    node.expressions = [];
-    var curElt = this.parseTemplateElement();
-    node.quasis = [curElt];
-    while (!curElt.tail) {
-      this.expect(tt.dollarBraceL);
-      node.expressions.push(this.parseExpression());
-      this.expect(tt.braceR);
-      node.quasis.push(curElt = this.parseTemplateElement());
-    }
-    this.next();
-    return this.finishNode(node, "TemplateLiteral");
-  };
-
-  // Parse an object literal or binding pattern.
-
-  pp$3.parseObj = function (isPattern, refShorthandDefaultPos) {
-    var node = this.startNode(),
-        first = true,
-        propHash = {};
-    node.properties = [];
-    this.next();
-    while (!this.eat(tt.braceR)) {
-      if (!first) {
-        this.expect(tt.comma);
-        if (this.afterTrailingComma(tt.braceR)) break;
-      } else first = false;
-
-      var prop = this.startNode(),
-          isGenerator = undefined,
-          startPos = undefined,
-          startLoc = undefined;
-      if (this.options.ecmaVersion >= 6) {
-        prop.method = false;
-        prop.shorthand = false;
-        if (isPattern || refShorthandDefaultPos) {
-          startPos = this.start;
-          startLoc = this.startLoc;
-        }
-        if (!isPattern) isGenerator = this.eat(tt.star);
-      }
-      this.parsePropertyName(prop);
-      this.parsePropertyValue(prop, isPattern, isGenerator, startPos, startLoc, refShorthandDefaultPos);
-      this.checkPropClash(prop, propHash);
-      node.properties.push(this.finishNode(prop, "Property"));
-    }
-    return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression");
-  };
-
-  pp$3.parsePropertyValue = function (prop, isPattern, isGenerator, startPos, startLoc, refShorthandDefaultPos) {
-    if (this.eat(tt.colon)) {
-      prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refShorthandDefaultPos);
-      prop.kind = "init";
-    } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
-      if (isPattern) this.unexpected();
-      prop.kind = "init";
-      prop.method = true;
-      prop.value = this.parseMethod(isGenerator);
-    } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && (prop.key.name === "get" || prop.key.name === "set") && (this.type != tt.comma && this.type != tt.braceR)) {
-      if (isGenerator || isPattern) this.unexpected();
-      prop.kind = prop.key.name;
-      this.parsePropertyName(prop);
-      prop.value = this.parseMethod(false);
-      var paramCount = prop.kind === "get" ? 0 : 1;
-      if (prop.value.params.length !== paramCount) {
-        var start = prop.value.start;
-        if (prop.kind === "get") this.raise(start, "getter should have no params");else this.raise(start, "setter should have exactly one param");
-      }
-    } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
-      prop.kind = "init";
-      if (isPattern) {
-        if (this.isKeyword(prop.key.name) || this.strict && (reservedWords$1.strictBind(prop.key.name) || reservedWords$1.strict(prop.key.name)) || !this.options.allowReserved && this.isReservedWord(prop.key.name)) this.raise(prop.key.start, "Binding " + prop.key.name);
-        prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
-      } else if (this.type === tt.eq && refShorthandDefaultPos) {
-        if (!refShorthandDefaultPos.start) refShorthandDefaultPos.start = this.start;
-        prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
-      } else {
-        prop.value = prop.key;
-      }
-      prop.shorthand = true;
-    } else this.unexpected();
-  };
-
-  pp$3.parsePropertyName = function (prop) {
-    if (this.options.ecmaVersion >= 6) {
-      if (this.eat(tt.bracketL)) {
-        prop.computed = true;
-        prop.key = this.parseMaybeAssign();
-        this.expect(tt.bracketR);
-        return prop.key;
-      } else {
-        prop.computed = false;
-      }
-    }
-    return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true);
-  };
-
-  // Initialize empty function node.
-
-  pp$3.initFunction = function (node) {
-    node.id = null;
-    if (this.options.ecmaVersion >= 6) {
-      node.generator = false;
-      node.expression = false;
-    }
-  };
-
-  // Parse object or class method.
-
-  pp$3.parseMethod = function (isGenerator) {
-    var node = this.startNode();
-    this.initFunction(node);
-    this.expect(tt.parenL);
-    node.params = this.parseBindingList(tt.parenR, false, false);
-    var allowExpressionBody = undefined;
-    if (this.options.ecmaVersion >= 6) {
-      node.generator = isGenerator;
-    }
-    this.parseFunctionBody(node, false);
-    return this.finishNode(node, "FunctionExpression");
-  };
-
-  // Parse arrow function expression with given parameters.
-
-  pp$3.parseArrowExpression = function (node, params) {
-    this.initFunction(node);
-    node.params = this.toAssignableList(params, true);
-    this.parseFunctionBody(node, true);
-    return this.finishNode(node, "ArrowFunctionExpression");
-  };
-
-  // Parse function body and check parameters.
-
-  pp$3.parseFunctionBody = function (node, allowExpression) {
-    var isExpression = allowExpression && this.type !== tt.braceL;
-
-    if (isExpression) {
-      node.body = this.parseMaybeAssign();
-      node.expression = true;
-    } else {
-      // Start a new scope with regard to labels and the `inFunction`
-      // flag (restore them to their old value afterwards).
-      var oldInFunc = this.inFunction,
-          oldInGen = this.inGenerator,
-          oldLabels = this.labels;
-      this.inFunction = true;this.inGenerator = node.generator;this.labels = [];
-      node.body = this.parseBlock(true);
-      node.expression = false;
-      this.inFunction = oldInFunc;this.inGenerator = oldInGen;this.labels = oldLabels;
-    }
-
-    // If this is a strict mode function, verify that argument names
-    // are not repeated, and it does not try to bind the words `eval`
-    // or `arguments`.
-    if (this.strict || !isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) {
-      var nameHash = {},
-          oldStrict = this.strict;
-      this.strict = true;
-      if (node.id) this.checkLVal(node.id, true);
-      for (var i = 0; i < node.params.length; i++) {
-        this.checkLVal(node.params[i], true, nameHash);
-      }this.strict = oldStrict;
-    }
-  };
-
-  // Parses a comma-separated list of expressions, and returns them as
-  // an array. `close` is the token type that ends the list, and
-  // `allowEmpty` can be turned on to allow subsequent commas with
-  // nothing in between them to be parsed as `null` (which is needed
-  // for array literals).
-
-  pp$3.parseExprList = function (close, allowTrailingComma, allowEmpty, refShorthandDefaultPos) {
-    var elts = [],
-        first = true;
-    while (!this.eat(close)) {
-      if (!first) {
-        this.expect(tt.comma);
-        if (allowTrailingComma && this.afterTrailingComma(close)) break;
-      } else first = false;
-
-      var elt = undefined;
-      if (allowEmpty && this.type === tt.comma) elt = null;else if (this.type === tt.ellipsis) elt = this.parseSpread(refShorthandDefaultPos);else elt = this.parseMaybeAssign(false, refShorthandDefaultPos);
-      elts.push(elt);
-    }
-    return elts;
-  };
-
-  // Parse the next token as an identifier. If `liberal` is true (used
-  // when parsing properties), it will also convert keywords into
-  // identifiers.
-
-  pp$3.parseIdent = function (liberal) {
-    var node = this.startNode();
-    if (liberal && this.options.allowReserved == "never") liberal = false;
-    if (this.type === tt.name) {
-      if (!liberal && (!this.options.allowReserved && this.isReservedWord(this.value) || this.strict && reservedWords$1.strict(this.value) && (this.options.ecmaVersion >= 6 || this.input.slice(this.start, this.end).indexOf("\\") == -1))) this.raise(this.start, "The keyword '" + this.value + "' is reserved");
-      node.name = this.value;
-    } else if (liberal && this.type.keyword) {
-      node.name = this.type.keyword;
-    } else {
-      this.unexpected();
-    }
-    this.next();
-    return this.finishNode(node, "Identifier");
-  };
-
-  // Parses yield expression inside generator.
-
-  pp$3.parseYield = function () {
-    var node = this.startNode();
-    this.next();
-    if (this.type == tt.semi || this.canInsertSemicolon() || this.type != tt.star && !this.type.startsExpr) {
-      node.delegate = false;
-      node.argument = null;
-    } else {
-      node.delegate = this.eat(tt.star);
-      node.argument = this.parseMaybeAssign();
-    }
-    return this.finishNode(node, "YieldExpression");
-  };
-
-  // Parses array and generator comprehensions.
-
-  pp$3.parseComprehension = function (node, isGenerator) {
-    node.blocks = [];
-    while (this.type === tt._for) {
-      var block = this.startNode();
-      this.next();
-      this.expect(tt.parenL);
-      block.left = this.parseBindingAtom();
-      this.checkLVal(block.left, true);
-      this.expectContextual("of");
-      block.right = this.parseExpression();
-      this.expect(tt.parenR);
-      node.blocks.push(this.finishNode(block, "ComprehensionBlock"));
-    }
-    node.filter = this.eat(tt._if) ? this.parseParenExpression() : null;
-    node.body = this.parseExpression();
-    this.expect(isGenerator ? tt.parenR : tt.bracketR);
-    node.generator = isGenerator;
-    return this.finishNode(node, "ComprehensionExpression");
-  };
-
-  var pp$4 = Parser.prototype;
-
-  // This function is used to raise exceptions on parse errors. It
-  // takes an offset integer (into the current `input`) to indicate
-  // the location of the error, attaches the position to the end
-  // of the error message, and then raises a `SyntaxError` with that
-  // message.
-
-  pp$4.raise = function (pos, message) {
-    var loc = getLineInfo(this.input, pos);
-    message += " (" + loc.line + ":" + loc.column + ")";
-    var err = new SyntaxError(message);
-    err.pos = pos;err.loc = loc;err.raisedAt = this.pos;
-    throw err;
-  };
-
-  pp$4.curPosition = function () {
-    if (this.options.locations) {
-      return new Position(this.curLine, this.pos - this.lineStart);
-    }
-  };
-
-  var Node = function Node(parser, pos, loc) {
-    babelHelpers_classCallCheck(this, Node);
-
-    this.type = "";
-    this.start = pos;
-    this.end = 0;
-    if (parser.options.locations) this.loc = new SourceLocation(parser, loc);
-    if (parser.options.directSourceFile) this.sourceFile = parser.options.directSourceFile;
-    if (parser.options.ranges) this.range = [pos, 0];
-  }
-
-  // Start an AST node, attaching a start offset.
-
-  ;
-
-  var pp$5 = Parser.prototype;
-
-  pp$5.startNode = function () {
-    return new Node(this, this.start, this.startLoc);
-  };
-
-  pp$5.startNodeAt = function (pos, loc) {
-    return new Node(this, pos, loc);
-  };
-
-  // Finish an AST node, adding `type` and `end` properties.
-
-  function finishNodeAt(node, type, pos, loc) {
-    node.type = type;
-    node.end = pos;
-    if (this.options.locations) node.loc.end = loc;
-    if (this.options.ranges) node.range[1] = pos;
-    return node;
-  }
-
-  pp$5.finishNode = function (node, type) {
-    return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc);
-  };
-
-  // Finish node at given position
-
-  pp$5.finishNodeAt = function (node, type, pos, loc) {
-    return finishNodeAt.call(this, node, type, pos, loc);
-  };
-
-  var TokContext = function TokContext(token, isExpr, preserveSpace, override) {
-    babelHelpers_classCallCheck(this, TokContext);
-
-    this.token = token;
-    this.isExpr = !!isExpr;
-    this.preserveSpace = !!preserveSpace;
-    this.override = override;
-  };
-
-  var types = {
-    b_stat: new TokContext("{", false),
-    b_expr: new TokContext("{", true),
-    b_tmpl: new TokContext("${", true),
-    p_stat: new TokContext("(", false),
-    p_expr: new TokContext("(", true),
-    q_tmpl: new TokContext("`", true, true, function (p) {
-      return p.readTmplToken();
-    }),
-    f_expr: new TokContext("function", true)
-  };
-
-  var pp$6 = Parser.prototype;
-
-  pp$6.initialContext = function () {
-    return [types.b_stat];
-  };
-
-  pp$6.braceIsBlock = function (prevType) {
-    if (prevType === tt.colon) {
-      var _parent = this.curContext();
-      if (_parent === types.b_stat || _parent === types.b_expr) return !_parent.isExpr;
-    }
-    if (prevType === tt._return) return lineBreak.test(this.input.slice(this.lastTokEnd, this.start));
-    if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR) return true;
-    if (prevType == tt.braceL) return this.curContext() === types.b_stat;
-    return !this.exprAllowed;
-  };
-
-  pp$6.updateContext = function (prevType) {
-    var update = undefined,
-        type = this.type;
-    if (type.keyword && prevType == tt.dot) this.exprAllowed = false;else if (update = type.updateContext) update.call(this, prevType);else this.exprAllowed = type.beforeExpr;
-  };
-
-  // Token-specific context update code
-
-  tt.parenR.updateContext = tt.braceR.updateContext = function () {
-    if (this.context.length == 1) {
-      this.exprAllowed = true;
-      return;
-    }
-    var out = this.context.pop();
-    if (out === types.b_stat && this.curContext() === types.f_expr) {
-      this.context.pop();
-      this.exprAllowed = false;
-    } else if (out === types.b_tmpl) {
-      this.exprAllowed = true;
-    } else {
-      this.exprAllowed = !out.isExpr;
-    }
-  };
-
-  tt.braceL.updateContext = function (prevType) {
-    this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr);
-    this.exprAllowed = true;
-  };
-
-  tt.dollarBraceL.updateContext = function () {
-    this.context.push(types.b_tmpl);
-    this.exprAllowed = true;
-  };
-
-  tt.parenL.updateContext = function (prevType) {
-    var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while;
-    this.context.push(statementParens ? types.p_stat : types.p_expr);
-    this.exprAllowed = true;
-  };
-
-  tt.incDec.updateContext = function () {
-    // tokExprAllowed stays unchanged
-  };
-
-  tt._function.updateContext = function () {
-    if (this.curContext() !== types.b_stat) this.context.push(types.f_expr);
-    this.exprAllowed = false;
-  };
-
-  tt.backQuote.updateContext = function () {
-    if (this.curContext() === types.q_tmpl) this.context.pop();else this.context.push(types.q_tmpl);
-    this.exprAllowed = false;
-  };
-
-  // Object type used to represent tokens. Note that normally, tokens
-  // simply exist as properties on the parser object. This is only
-  // used for the onToken callback and the external tokenizer.
-
-  var Token = function Token(p) {
-    babelHelpers_classCallCheck(this, Token);
-
-    this.type = p.type;
-    this.value = p.value;
-    this.start = p.start;
-    this.end = p.end;
-    if (p.options.locations) this.loc = new SourceLocation(p, p.startLoc, p.endLoc);
-    if (p.options.ranges) this.range = [p.start, p.end];
-  }
-
-  // ## Tokenizer
-
-  ;
-
-  var pp$7 = Parser.prototype;
-
-  // Are we running under Rhino?
-  var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
-
-  // Move to the next token
-
-  pp$7.next = function () {
-    if (this.options.onToken) this.options.onToken(new Token(this));
-
-    this.lastTokEnd = this.end;
-    this.lastTokStart = this.start;
-    this.lastTokEndLoc = this.endLoc;
-    this.lastTokStartLoc = this.startLoc;
-    this.nextToken();
-  };
-
-  pp$7.getToken = function () {
-    this.next();
-    return new Token(this);
-  };
-
-  // If we're in an ES6 environment, make parsers iterable
-  if (typeof Symbol !== "undefined") pp$7[Symbol.iterator] = function () {
-    var self = this;
-    return { next: function () {
-        var token = self.getToken();
-        return {
-          done: token.type === tt.eof,
-          value: token
-        };
-      } };
-  };
-
-  // Toggle strict mode. Re-reads the next number or string to please
-  // pedantic tests (`"use strict"; 010;` should fail).
-
-  pp$7.setStrict = function (strict) {
-    this.strict = strict;
-    if (this.type !== tt.num && this.type !== tt.string) return;
-    this.pos = this.start;
-    if (this.options.locations) {
-      while (this.pos < this.lineStart) {
-        this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1;
-        --this.curLine;
-      }
-    }
-    this.nextToken();
-  };
-
-  pp$7.curContext = function () {
-    return this.context[this.context.length - 1];
-  };
-
-  // Read a single token, updating the parser object's token-related
-  // properties.
-
-  pp$7.nextToken = function () {
-    var curContext = this.curContext();
-    if (!curContext || !curContext.preserveSpace) this.skipSpace();
-
-    this.start = this.pos;
-    if (this.options.locations) this.startLoc = this.curPosition();
-    if (this.pos >= this.input.length) return this.finishToken(tt.eof);
-
-    if (curContext.override) return curContext.override(this);else this.readToken(this.fullCharCodeAtPos());
-  };
-
-  pp$7.readToken = function (code) {
-    // Identifier or keyword. '\uXXXX' sequences are allowed in
-    // identifiers, so '\' also dispatches to that.
-    if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */) return this.readWord();
-
-    return this.getTokenFromCode(code);
-  };
-
-  pp$7.fullCharCodeAtPos = function () {
-    var code = this.input.charCodeAt(this.pos);
-    if (code <= 0xd7ff || code >= 0xe000) return code;
-    var next = this.input.charCodeAt(this.pos + 1);
-    return (code << 10) + next - 0x35fdc00;
-  };
-
-  pp$7.skipBlockComment = function () {
-    var startLoc = this.options.onComment && this.curPosition();
-    var start = this.pos,
-        end = this.input.indexOf("*/", this.pos += 2);
-    if (end === -1) this.raise(this.pos - 2, "Unterminated comment");
-    this.pos = end + 2;
-    if (this.options.locations) {
-      lineBreakG.lastIndex = start;
-      var match = undefined;
-      while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
-        ++this.curLine;
-        this.lineStart = match.index + match[0].length;
-      }
-    }
-    if (this.options.onComment) this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos, startLoc, this.curPosition());
-  };
-
-  pp$7.skipLineComment = function (startSkip) {
-    var start = this.pos;
-    var startLoc = this.options.onComment && this.curPosition();
-    var ch = this.input.charCodeAt(this.pos += startSkip);
-    while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
-      ++this.pos;
-      ch = this.input.charCodeAt(this.pos);
-    }
-    if (this.options.onComment) this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos, startLoc, this.curPosition());
-  };
-
-  // Called at the start of the parse and after every token. Skips
-  // whitespace and comments, and.
-
-  pp$7.skipSpace = function () {
-    loop: while (this.pos < this.input.length) {
-      var ch = this.input.charCodeAt(this.pos);
-      switch (ch) {
-        case 32:case 160:
-          // ' '
-          ++this.pos;
-          break;
-        case 13:
-          if (this.input.charCodeAt(this.pos + 1) === 10) {
-            ++this.pos;
-          }
-        case 10:case 8232:case 8233:
-          ++this.pos;
-          if (this.options.locations) {
-            ++this.curLine;
-            this.lineStart = this.pos;
-          }
-          break;
-        case 47:
-          // '/'
-          switch (this.input.charCodeAt(this.pos + 1)) {
-            case 42:
-              // '*'
-              this.skipBlockComment();
-              break;
-            case 47:
-              this.skipLineComment(2);
-              break;
-            default:
-              break loop;
-          }
-          break;
-        default:
-          if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
-            ++this.pos;
-          } else {
-            break loop;
-          }
-      }
-    }
-  };
-
-  // Called at the end of every token. Sets `end`, `val`, and
-  // maintains `context` and `exprAllowed`, and skips the space after
-  // the token, so that the next one's `start` will point at the
-  // right position.
-
-  pp$7.finishToken = function (type, val) {
-    this.end = this.pos;
-    if (this.options.locations) this.endLoc = this.curPosition();
-    var prevType = this.type;
-    this.type = type;
-    this.value = val;
-
-    this.updateContext(prevType);
-  };
-
-  // ### Token reading
-
-  // This is the function that is called to fetch the next token. It
-  // is somewhat obscure, because it works in character codes rather
-  // than characters, and because operator parsing has been inlined
-  // into it.
-  //
-  // All in the name of speed.
-  //
-  pp$7.readToken_dot = function () {
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next >= 48 && next <= 57) return this.readNumber(true);
-    var next2 = this.input.charCodeAt(this.pos + 2);
-    if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) {
-      // 46 = dot '.'
-      this.pos += 3;
-      return this.finishToken(tt.ellipsis);
-    } else {
-      ++this.pos;
-      return this.finishToken(tt.dot);
-    }
-  };
-
-  pp$7.readToken_slash = function () {
-    // '/'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (this.exprAllowed) {
-      ++this.pos;return this.readRegexp();
-    }
-    if (next === 61) return this.finishOp(tt.assign, 2);
-    return this.finishOp(tt.slash, 1);
-  };
-
-  pp$7.readToken_mult_modulo = function (code) {
-    // '%*'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next === 61) return this.finishOp(tt.assign, 2);
-    return this.finishOp(code === 42 ? tt.star : tt.modulo, 1);
-  };
-
-  pp$7.readToken_pipe_amp = function (code) {
-    // '|&'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2);
-    if (next === 61) return this.finishOp(tt.assign, 2);
-    return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1);
-  };
-
-  pp$7.readToken_caret = function () {
-    // '^'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next === 61) return this.finishOp(tt.assign, 2);
-    return this.finishOp(tt.bitwiseXOR, 1);
-  };
-
-  pp$7.readToken_plus_min = function (code) {
-    // '+-'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next === code) {
-      if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 && lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
-        // A `-->` line comment
-        this.skipLineComment(3);
-        this.skipSpace();
-        return this.nextToken();
-      }
-      return this.finishOp(tt.incDec, 2);
-    }
-    if (next === 61) return this.finishOp(tt.assign, 2);
-    return this.finishOp(tt.plusMin, 1);
-  };
-
-  pp$7.readToken_lt_gt = function (code) {
-    // '<>'
-    var next = this.input.charCodeAt(this.pos + 1);
-    var size = 1;
-    if (next === code) {
-      size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
-      if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1);
-      return this.finishOp(tt.bitShift, size);
-    }
-    if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 && this.input.charCodeAt(this.pos + 3) == 45) {
-      if (this.inModule) this.unexpected();
-      // `<!--`, an XML-style comment that should be interpreted as a line comment
-      this.skipLineComment(4);
-      this.skipSpace();
-      return this.nextToken();
-    }
-    if (next === 61) size = this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2;
-    return this.finishOp(tt.relational, size);
-  };
-
-  pp$7.readToken_eq_excl = function (code) {
-    // '=!'
-    var next = this.input.charCodeAt(this.pos + 1);
-    if (next === 61) return this.finishOp(tt.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2);
-    if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) {
-      // '=>'
-      this.pos += 2;
-      return this.finishToken(tt.arrow);
-    }
-    return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1);
-  };
-
-  pp$7.getTokenFromCode = function (code) {
-    switch (code) {
-      // The interpretation of a dot depends on whether it is followed
-      // by a digit or another two dots.
-      case 46:
-        // '.'
-        return this.readToken_dot();
-
-      // Punctuation tokens.
-      case 40:
-        ++this.pos;return this.finishToken(tt.parenL);
-      case 41:
-        ++this.pos;return this.finishToken(tt.parenR);
-      case 59:
-        ++this.pos;return this.finishToken(tt.semi);
-      case 44:
-        ++this.pos;return this.finishToken(tt.comma);
-      case 91:
-        ++this.pos;return this.finishToken(tt.bracketL);
-      case 93:
-        ++this.pos;return this.finishToken(tt.bracketR);
-      case 123:
-        ++this.pos;return this.finishToken(tt.braceL);
-      case 125:
-        ++this.pos;return this.finishToken(tt.braceR);
-      case 58:
-        ++this.pos;return this.finishToken(tt.colon);
-      case 63:
-        ++this.pos;return this.finishToken(tt.question);
-
-      case 96:
-        // '`'
-        if (this.options.ecmaVersion < 6) break;
-        ++this.pos;
-        return this.finishToken(tt.backQuote);
-
-      case 48:
-        // '0'
-        var next = this.input.charCodeAt(this.pos + 1);
-        if (next === 120 || next === 88) return this.readRadixNumber(16); // '0x', '0X' - hex number
-        if (this.options.ecmaVersion >= 6) {
-          if (next === 111 || next === 79) return this.readRadixNumber(8); // '0o', '0O' - octal number
-          if (next === 98 || next === 66) return this.readRadixNumber(2); // '0b', '0B' - binary number
-        }
-      // Anything else beginning with a digit is an integer, octal
-      // number, or float.
-      case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:
-        // 1-9
-        return this.readNumber(false);
-
-      // Quotes produce strings.
-      case 34:case 39:
-        // '"', "'"
-        return this.readString(code);
-
-      // Operators are parsed inline in tiny state machines. '=' (61) is
-      // often referred to. `finishOp` simply skips the amount of
-      // characters it is given as second argument, and returns a token
-      // of the type given by its first argument.
-
-      case 47:
-        // '/'
-        return this.readToken_slash();
-
-      case 37:case 42:
-        // '%*'
-        return this.readToken_mult_modulo(code);
-
-      case 124:case 38:
-        // '|&'
-        return this.readToken_pipe_amp(code);
-
-      case 94:
-        // '^'
-        return this.readToken_caret();
-
-      case 43:case 45:
-        // '+-'
-        return this.readToken_plus_min(code);
-
-      case 60:case 62:
-        // '<>'
-        return this.readToken_lt_gt(code);
-
-      case 61:case 33:
-        // '=!'
-        return this.readToken_eq_excl(code);
-
-      case 126:
-        // '~'
-        return this.finishOp(tt.prefix, 1);
-    }
-
-    this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
-  };
-
-  pp$7.finishOp = function (type, size) {
-    var str = this.input.slice(this.pos, this.pos + size);
-    this.pos += size;
-    return this.finishToken(type, str);
-  };
-
-  // Parse a regular expression. Some context-awareness is necessary,
-  // since a '/' inside a '[]' set does not end the expression.
-
-  function tryCreateRegexp(src, flags, throwErrorAt) {
-    try {
-      return new RegExp(src, flags);
-    } catch (e) {
-      if (throwErrorAt !== undefined) {
-        if (e instanceof SyntaxError) this.raise(throwErrorAt, "Error parsing regular expression: " + e.message);
-        this.raise(e);
-      }
-    }
-  }
-
-  var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u");
-
-  pp$7.readRegexp = function () {
-    var _this = this;
-
-    var escaped = undefined,
-        inClass = undefined,
-        start = this.pos;
-    for (;;) {
-      if (this.pos >= this.input.length) this.raise(start, "Unterminated regular expression");
-      var ch = this.input.charAt(this.pos);
-      if (lineBreak.test(ch)) this.raise(start, "Unterminated regular expression");
-      if (!escaped) {
-        if (ch === "[") inClass = true;else if (ch === "]" && inClass) inClass = false;else if (ch === "/" && !inClass) break;
-        escaped = ch === "\\";
-      } else escaped = false;
-      ++this.pos;
-    }
-    var content = this.input.slice(start, this.pos);
-    ++this.pos;
-    // Need to use `readWord1` because '\uXXXX' sequences are allowed
-    // here (don't ask).
-    var mods = this.readWord1();
-    var tmp = content;
-    if (mods) {
-      var validFlags = /^[gmsiy]*$/;
-      if (this.options.ecmaVersion >= 6) validFlags = /^[gmsiyu]*$/;
-      if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag");
-      if (mods.indexOf('u') >= 0 && !regexpUnicodeSupport) {
-        // Replace each astral symbol and every Unicode escape sequence that
-        // possibly represents an astral symbol or a paired surrogate with a
-        // single ASCII symbol to avoid throwing on regular expressions that
-        // are only valid in combination with the `/u` flag.
-        // Note: replacing with the ASCII symbol `x` might cause false
-        // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a
-        // perfectly valid pattern that is equivalent to `[a-b]`, but it would
-        // be replaced by `[x-b]` which throws an error.
-        tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (match, code, offset) {
-          code = Number("0x" + code);
-          if (code > 0x10FFFF) _this.raise(start + offset + 3, "Code point out of bounds");
-          return "x";
-        });
-        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x");
-      }
-    }
-    // Detect invalid regular expressions.
-    var value = null;
-    // Rhino's regular expression parser is flaky and throws uncatchable exceptions,
-    // so don't do detection if we are running under Rhino
-    if (!isRhino) {
-      tryCreateRegexp(tmp, undefined, start);
-      // Get a regular expression object for this pattern-flag pair, or `null` in
-      // case the current environment doesn't support the flags it uses.
-      value = tryCreateRegexp(content, mods);
-    }
-    return this.finishToken(tt.regexp, { pattern: content, flags: mods, value: value });
-  };
-
-  // Read an integer in the given radix. Return null if zero digits
-  // were read, the integer value otherwise. When `len` is given, this
-  // will return `null` unless the integer has exactly `len` digits.
-
-  pp$7.readInt = function (radix, len) {
-    var start = this.pos,
-        total = 0;
-    for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
-      var code = this.input.charCodeAt(this.pos),
-          val = undefined;
-      if (code >= 97) val = code - 97 + 10; // a
-      else if (code >= 65) val = code - 65 + 10; // A
-        else if (code >= 48 && code <= 57) val = code - 48; // 0-9
-          else val = Infinity;
-      if (val >= radix) break;
-      ++this.pos;
-      total = total * radix + val;
-    }
-    if (this.pos === start || len != null && this.pos - start !== len) return null;
-
-    return total;
-  };
-
-  pp$7.readRadixNumber = function (radix) {
-    this.pos += 2; // 0x
-    var val = this.readInt(radix);
-    if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix);
-    if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number");
-    return this.finishToken(tt.num, val);
-  };
-
-  // Read an integer, octal integer, or floating-point number.
-
-  pp$7.readNumber = function (startsWithDot) {
-    var start = this.pos,
-        isFloat = false,
-        octal = this.input.charCodeAt(this.pos) === 48;
-    if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number");
-    var next = this.input.charCodeAt(this.pos);
-    if (next === 46) {
-      // '.'
-      ++this.pos;
-      this.readInt(10);
-      isFloat = true;
-      next = this.input.charCodeAt(this.pos);
-    }
-    if (next === 69 || next === 101) {
-      // 'eE'
-      next = this.input.charCodeAt(++this.pos);
-      if (next === 43 || next === 45) ++this.pos; // '+-'
-      if (this.readInt(10) === null) this.raise(start, "Invalid number");
-      isFloat = true;
-    }
-    if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number");
-
-    var str = this.input.slice(start, this.pos),
-        val = undefined;
-    if (isFloat) val = parseFloat(str);else if (!octal || str.length === 1) val = parseInt(str, 10);else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number");else val = parseInt(str, 8);
-    return this.finishToken(tt.num, val);
-  };
-
-  // Read a string value, interpreting backslash-escapes.
-
-  pp$7.readCodePoint = function () {
-    var ch = this.input.charCodeAt(this.pos),
-        code = undefined;
-
-    if (ch === 123) {
-      if (this.options.ecmaVersion < 6) this.unexpected();
-      var codePos = ++this.pos;
-      code = this.readHexChar(this.input.indexOf('}', this.pos) - this.pos);
-      ++this.pos;
-      if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds");
-    } else {
-      code = this.readHexChar(4);
-    }
-    return code;
-  };
-
-  function codePointToString(code) {
-    // UTF-16 Decoding
-    if (code <= 0xFFFF) return String.fromCharCode(code);
-    code -= 0x10000;
-    return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00);
-  }
-
-  pp$7.readString = function (quote) {
-    var out = "",
-        chunkStart = ++this.pos;
-    for (;;) {
-      if (this.pos >= this.input.length) this.raise(this.start, "Unterminated string constant");
-      var ch = this.input.charCodeAt(this.pos);
-      if (ch === quote) break;
-      if (ch === 92) {
-        // '\'
-        out += this.input.slice(chunkStart, this.pos);
-        out += this.readEscapedChar(false);
-        chunkStart = this.pos;
-      } else {
-        if (isNewLine(ch)) this.raise(this.start, "Unterminated string constant");
-        ++this.pos;
-      }
-    }
-    out += this.input.slice(chunkStart, this.pos++);
-    return this.finishToken(tt.string, out);
-  };
-
-  // Reads template string tokens.
-
-  pp$7.readTmplToken = function () {
-    var out = "",
-        chunkStart = this.pos;
-    for (;;) {
-      if (this.pos >= this.input.length) this.raise(this.start, "Unterminated template");
-      var ch = this.input.charCodeAt(this.pos);
-      if (ch === 96 || ch === 36 && this.input.charCodeAt(this.pos + 1) === 123) {
-        // '`', '${'
-        if (this.pos === this.start && this.type === tt.template) {
-          if (ch === 36) {
-            this.pos += 2;
-            return this.finishToken(tt.dollarBraceL);
-          } else {
-            ++this.pos;
-            return this.finishToken(tt.backQuote);
-          }
-        }
-        out += this.input.slice(chunkStart, this.pos);
-        return this.finishToken(tt.template, out);
-      }
-      if (ch === 92) {
-        // '\'
-        out += this.input.slice(chunkStart, this.pos);
-        out += this.readEscapedChar(true);
-        chunkStart = this.pos;
-      } else if (isNewLine(ch)) {
-        out += this.input.slice(chunkStart, this.pos);
-        ++this.pos;
-        switch (ch) {
-          case 13:
-            if (this.input.charCodeAt(this.pos) === 10) ++this.pos;
-          case 10:
-            out += "\n";
-            break;
-          default:
-            out += String.fromCharCode(ch);
-            break;
-        }
-        if (this.options.locations) {
-          ++this.curLine;
-          this.lineStart = this.pos;
-        }
-        chunkStart = this.pos;
-      } else {
-        ++this.pos;
-      }
-    }
-  };
-
-  // Used to read escaped characters
-
-  pp$7.readEscapedChar = function (inTemplate) {
-    var ch = this.input.charCodeAt(++this.pos);
-    ++this.pos;
-    switch (ch) {
-      case 110:
-        return "\n"; // 'n' -> '\n'
-      case 114:
-        return "\r"; // 'r' -> '\r'
-      case 120:
-        return String.fromCharCode(this.readHexChar(2)); // 'x'
-      case 117:
-        return codePointToString(this.readCodePoint()); // 'u'
-      case 116:
-        return "\t"; // 't' -> '\t'
-      case 98:
-        return "\b"; // 'b' -> '\b'
-      case 118:
-        return "\u000b"; // 'v' -> '\u000b'
-      case 102:
-        return "\f"; // 'f' -> '\f'
-      case 13:
-        if (this.input.charCodeAt(this.pos) === 10) ++this.pos; // '\r\n'
-      case 10:
-        // ' \n'
-        if (this.options.locations) {
-          this.lineStart = this.pos;++this.curLine;
-        }
-        return "";
-      default:
-        if (ch >= 48 && ch <= 55) {
-          var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
-          var octal = parseInt(octalStr, 8);
-          if (octal > 255) {
-            octalStr = octalStr.slice(0, -1);
-            octal = parseInt(octalStr, 8);
-          }
-          if (octal > 0 && (this.strict || inTemplate)) {
-            this.raise(this.pos - 2, "Octal literal in strict mode");
-          }
-          this.pos += octalStr.length - 1;
-          return String.fromCharCode(octal);
-        }
-        return String.fromCharCode(ch);
-    }
-  };
-
-  // Used to read character escape sequences ('\x', '\u', '\U').
-
-  pp$7.readHexChar = function (len) {
-    var codePos = this.pos;
-    var n = this.readInt(16, len);
-    if (n === null) this.raise(codePos, "Bad character escape sequence");
-    return n;
-  };
-
-  // Read an identifier, and return it as a string. Sets `this.containsEsc`
-  // to whether the word contained a '\u' escape.
-  //
-  // Incrementally adds only escaped chars, adding other chunks as-is
-  // as a micro-optimization.
-
-  pp$7.readWord1 = function () {
-    this.containsEsc = false;
-    var word = "",
-        first = true,
-        chunkStart = this.pos;
-    var astral = this.options.ecmaVersion >= 6;
-    while (this.pos < this.input.length) {
-      var ch = this.fullCharCodeAtPos();
-      if (isIdentifierChar(ch, astral)) {
-        this.pos += ch <= 0xffff ? 1 : 2;
-      } else if (ch === 92) {
-        // "\"
-        this.containsEsc = true;
-        word += this.input.slice(chunkStart, this.pos);
-        var escStart = this.pos;
-        if (this.input.charCodeAt(++this.pos) != 117) // "u"
-          this.raise(this.pos, "Expecting Unicode escape sequence \\uXXXX");
-        ++this.pos;
-        var esc = this.readCodePoint();
-        if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral)) this.raise(escStart, "Invalid Unicode escape");
-        word += codePointToString(esc);
-        chunkStart = this.pos;
-      } else {
-        break;
-      }
-      first = false;
-    }
-    return word + this.input.slice(chunkStart, this.pos);
-  };
-
-  // Read an identifier or keyword token. Will check for reserved
-  // words when necessary.
-
-  pp$7.readWord = function () {
-    var word = this.readWord1();
-    var type = tt.name;
-    if ((this.options.ecmaVersion >= 6 || !this.containsEsc) && this.isKeyword(word)) type = keywordTypes[word];
-    return this.finishToken(type, word);
-  };
-
-  // The main exported interface (under `self.acorn` when in the
-  // browser) is a `parse` function that takes a code string and
-  // returns an abstract syntax tree as specified by [Mozilla parser
-  // API][api].
-  //
-  // [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
-
-  function parse(input, options) {
-    return new Parser(options, input).parse();
-  }
-
-  function walk(ast, _ref) {
-    var enter = _ref.enter;
-    var leave = _ref.leave;
-
-    visit(ast, null, enter, leave);
-  }
-
-  var context = {
-    skip: function () {
-      return context.shouldSkip = true;
-    }
-  };
-
-  var childKeys = {};
-
-  var toString = Object.prototype.toString;
-
-  function isArray(thing) {
-    return toString.call(thing) === '[object Array]';
-  }
-
-  function visit(node, parent, enter, leave, prop, index) {
-    if (!node) return;
-
-    if (enter) {
-      context.shouldSkip = false;
-      enter.call(context, node, parent, prop, index);
-      if (context.shouldSkip) return;
-    }
-
-    var keys = childKeys[node.type] || (childKeys[node.type] = Object.keys(node).filter(function (prop) {
-      return typeof node[prop] === 'object';
-    }));
-
-    var key = undefined,
-        value = undefined,
-        i = undefined,
-        j = undefined;
-
-    i = keys.length;
-    while (i--) {
-      key = keys[i];
-      value = node[key];
-
-      if (isArray(value)) {
-        j = value.length;
-        while (j--) {
-          visit(value[j], node, enter, leave, key, j);
-        }
-      } else if (value && value.type) {
-        visit(value, node, enter, leave, key, null);
-      }
-    }
-
-    if (leave) {
-      leave(node, parent, prop, index);
-    }
-  }
-
-  var extractors = {
-    Identifier: function (names, param) {
-      names.push(param.name);
-    },
-
-    ObjectPattern: function (names, param) {
-      param.properties.forEach(function (prop) {
-        extractors[prop.key.type](names, prop.key);
-      });
-    },
-
-    ArrayPattern: function (names, param) {
-      param.elements.forEach(function (element) {
-        if (element) extractors[element.type](names, element);
-      });
-    },
-
-    RestElement: function (names, param) {
-      extractors[param.argument.type](names, param.argument);
-    },
-
-    AssignmentPattern: function (names, param) {
-      return extractors[param.left.type](names, param.left);
-    }
-  };
-
-  function extractNames(param) {
-    var names = [];
-
-    extractors[param.type](names, param);
-    return names;
-  }
-
-  var Declaration = (function () {
-    function Declaration() {
-      babelHelpers_classCallCheck(this, Declaration);
-
-      this.statement = null;
-      this.name = null;
-
-      this.isReassigned = false;
-      this.aliases = [];
-    }
-
-    Declaration.prototype.addAlias = function addAlias(declaration) {
-      this.aliases.push(declaration);
-    };
-
-    Declaration.prototype.addReference = function addReference(reference) {
-      reference.declaration = this;
-      this.name = reference.name; // TODO handle differences of opinion
-
-      if (reference.isReassignment) this.isReassigned = true;
-    };
-
-    Declaration.prototype.render = function render(es6) {
-      if (es6) return this.name;
-      if (!this.isReassigned || !this.isExported) return this.name;
-
-      return 'exports.' + this.name;
-    };
-
-    Declaration.prototype.use = function use() {
-      this.isUsed = true;
-      if (this.statement) this.statement.mark();
-
-      this.aliases.forEach(function (alias) {
-        return alias.use();
-      });
-    };
-
-    return Declaration;
-  })();
-
-  var Scope = (function () {
-    function Scope(options) {
-      var _this = this;
-
-      babelHelpers_classCallCheck(this, Scope);
-
-      options = options || {};
-
-      this.parent = options.parent;
-      this.isBlockScope = !!options.block;
-
-      this.declarations = blank();
-
-      if (options.params) {
-        options.params.forEach(function (param) {
-          extractNames(param).forEach(function (name) {
-            _this.declarations[name] = new Declaration(name);
-          });
-        });
-      }
-    }
-
-    Scope.prototype.addDeclaration = function addDeclaration(node, isBlockDeclaration, isVar) {
-      var _this2 = this;
-
-      if (!isBlockDeclaration && this.isBlockScope) {
-        // it's a `var` or function node, and this
-        // is a block scope, so we need to go up
-        this.parent.addDeclaration(node, isBlockDeclaration, isVar);
-      } else {
-        extractNames(node.id).forEach(function (name) {
-          _this2.declarations[name] = new Declaration(name);
-        });
-      }
-    };
-
-    Scope.prototype.contains = function contains(name) {
-      return this.declarations[name] || (this.parent ? this.parent.contains(name) : false);
-    };
-
-    Scope.prototype.eachDeclaration = function eachDeclaration(fn) {
-      var _this3 = this;
-
-      keys(this.declarations).forEach(function (key) {
-        fn(key, _this3.declarations[key]);
-      });
-    };
-
-    Scope.prototype.findDeclaration = function findDeclaration(name) {
-      return this.declarations[name] || this.parent && this.parent.findDeclaration(name);
-    };
-
-    return Scope;
-  })();
-
-  var blockDeclarations = {
-    'const': true,
-    'let': true
-  };
-  function attachScopes(statement) {
-    var node = statement.node;
-    var scope = statement.scope;
-
-    walk(node, {
-      enter: function (node, parent) {
-        // function foo () {...}
-        // class Foo {...}
-        if (/(Function|Class)Declaration/.test(node.type)) {
-          scope.addDeclaration(node, false, false);
-        }
-
-        // var foo = 1
-        if (node.type === 'VariableDeclaration') {
-          var isBlockDeclaration = blockDeclarations[node.kind];
-          // only one declarator per block, because we split them up already
-          scope.addDeclaration(node.declarations[0], isBlockDeclaration, true);
-        }
-
-        var newScope = undefined;
-
-        // create new function scope
-        if (/Function/.test(node.type)) {
-          newScope = new Scope({
-            parent: scope,
-            block: false,
-            params: node.params
-          });
-
-          // named function expressions - the name is considered
-          // part of the function's scope
-          if (node.type === 'FunctionExpression' && node.id) {
-            newScope.addDeclaration(node, false, false);
-          }
-        }
-
-        // create new block scope
-        if (node.type === 'BlockStatement' && !/Function/.test(parent.type)) {
-          newScope = new Scope({
-            parent: scope,
-            block: true
-          });
-        }
-
-        // catch clause has its own block scope
-        if (node.type === 'CatchClause') {
-          newScope = new Scope({
-            parent: scope,
-            params: [node.param],
-            block: true
-          });
-        }
-
-        if (newScope) {
-          Object.defineProperty(node, '_scope', {
-            value: newScope,
-            configurable: true
-          });
-
-          scope = newScope;
-        }
-      },
-      leave: function (node) {
-        if (node._scope) {
-          scope = scope.parent;
-        }
-      }
-    });
-  }
-
-  function getLocation(source, charIndex) {
-    var lines = source.split('\n');
-    var len = lines.length;
-
-    var lineStart = 0;
-    var i = undefined;
-
-    for (i = 0; i < len; i += 1) {
-      var line = lines[i];
-      var lineEnd = lineStart + line.length + 1; // +1 for newline
-
-      if (lineEnd > charIndex) {
-        return { line: i + 1, column: charIndex - lineStart };
-      }
-
-      lineStart = lineEnd;
-    }
-
-    throw new Error('Could not determine location of character');
-  }
-
-  var modifierNodes = {
-    AssignmentExpression: 'left',
-    UpdateExpression: 'argument'
-  };
-
-  function isIife(node, parent) {
-    return parent && parent.type === 'CallExpression' && node === parent.callee;
-  }
-
-  function isReference(node, parent) {
-    if (node.type === 'MemberExpression') {
-      return !node.computed && isReference(node.object, node);
-    }
-
-    if (node.type === 'Identifier') {
-      // TODO is this right?
-      if (parent.type === 'MemberExpression') return parent.computed || node === parent.object;
-
-      // disregard the `bar` in { bar: foo }
-      if (parent.type === 'Property' && node !== parent.value) return false;
-
-      // disregard the `bar` in `class Foo { bar () {...} }`
-      if (parent.type === 'MethodDefinition') return false;
-
-      // disregard the `bar` in `export { foo as bar }`
-      if (parent.type === 'ExportSpecifier' && node !== parent.local) return;
-
-      return true;
-    }
-  }
-
-  var Reference = function Reference(node, scope) {
-    babelHelpers_classCallCheck(this, Reference);
-
-    this.node = node;
-    this.scope = scope;
-
-    this.declaration = null; // bound later
-
-    this.parts = [];
-
-    var root = node;
-    while (root.type === 'MemberExpression') {
-      this.parts.unshift(root.property.name);
-      root = root.object;
-    }
-
-    this.name = root.name;
-
-    this.start = node.start;
-    this.end = node.start + this.name.length; // can be overridden in the case of namespace members
-    this.rewritten = false;
-  };
-
-  var Statement = (function () {
-    function Statement(node, module, start, end) {
-      babelHelpers_classCallCheck(this, Statement);
-
-      this.node = node;
-      this.module = module;
-      this.start = start;
-      this.end = end;
-      this.next = null; // filled in later
-
-      this.scope = new Scope();
-
-      this.references = [];
-      this.stringLiteralRanges = [];
-
-      this.isIncluded = false;
-
-      this.isImportDeclaration = node.type === 'ImportDeclaration';
-      this.isExportDeclaration = /^Export/.test(node.type);
-      this.isReexportDeclaration = this.isExportDeclaration && !!node.source;
-    }
-
-    Statement.prototype.analyse = function analyse() {
-      var _this = this;
-
-      if (this.isImportDeclaration) return; // nothing to analyse
-
-      // attach scopes
-      attachScopes(this);
-
-      // attach statement to each top-level declaration,
-      // so we can mark statements easily
-      this.scope.eachDeclaration(function (name, declaration) {
-        declaration.statement = _this;
-      });
-
-      // find references
-      var module = this.module;
-      var references = this.references;
-      var scope = this.scope;
-      var stringLiteralRanges = this.stringLiteralRanges;
-
-      var readDepth = 0;
-
-      walk(this.node, {
-        enter: function (node, parent) {
-          if (node.type === 'TemplateElement') stringLiteralRanges.push([node.start, node.end]);
-          if (node.type === 'Literal' && typeof node.value === 'string' && /\n/.test(node.raw)) {
-            stringLiteralRanges.push([node.start + 1, node.end - 1]);
-          }
-
-          if (node._scope) scope = node._scope;
-          if (/Function/.test(node.type) && !isIife(node, parent)) readDepth += 1;
-
-          // special case – shorthand properties. because node.key === node.value,
-          // we can't differentiate once we've descended into the node
-          if (node.type === 'Property' && node.shorthand) {
-            var reference = new Reference(node.key, scope);
-            reference.isShorthandProperty = true; // TODO feels a bit kludgy
-            references.push(reference);
-            return this.skip();
-          }
-
-          var isReassignment = undefined;
-
-          if (parent && parent.type in modifierNodes) {
-            var subject = parent[modifierNodes[parent.type]];
-            var depth = 0;
-
-            while (subject.type === 'MemberExpression') {
-              subject = subject.object;
-              depth += 1;
-            }
-
-            var importDeclaration = module.imports[subject.name];
-
-            if (!scope.contains(subject.name) && importDeclaration) {
-              var minDepth = importDeclaration.name === '*' ? 2 : // cannot do e.g. `namespace.foo = bar`
-              1; // cannot do e.g. `foo = bar`, but `foo.bar = bar` is fine
-
-              if (depth < minDepth) {
-                var err = new Error('Illegal reassignment to import \'' + subject.name + '\'');
-                err.file = module.id;
-                err.loc = getLocation(module.magicString.toString(), subject.start);
-                throw err;
-              }
-            }
-
-            isReassignment = !depth;
-          }
-
-          if (isReference(node, parent)) {
-            // function declaration IDs are a special case – they're associated
-            // with the parent scope
-            var referenceScope = parent.type === 'FunctionDeclaration' && node === parent.id ? scope.parent : scope;
-
-            var reference = new Reference(node, referenceScope);
-            references.push(reference);
-
-            reference.isImmediatelyUsed = !readDepth;
-            reference.isReassignment = isReassignment;
-
-            this.skip(); // don't descend from `foo.bar.baz` into `foo.bar`
-          }
-        },
-        leave: function (node, parent) {
-          if (node._scope) scope = scope.parent;
-          if (/Function/.test(node.type) && !isIife(node, parent)) readDepth -= 1;
-        }
-      });
-    };
-
-    Statement.prototype.mark = function mark() {
-      if (this.isIncluded) return; // prevent infinite loops
-      this.isIncluded = true;
-
-      this.references.forEach(function (reference) {
-        if (reference.declaration) reference.declaration.use();
-      });
-    };
-
-    Statement.prototype.markSideEffect = function markSideEffect() {
-      if (this.isIncluded) return;
-
-      var statement = this;
-      var hasSideEffect = false;
-
-      walk(this.node, {
-        enter: function (node, parent) {
-          if (/Function/.test(node.type) && !isIife(node, parent)) return this.skip();
-
-          // If this is a top-level call expression, or an assignment to a global,
-          // this statement will need to be marked
-          if (node.type === 'CallExpression' || node.type === 'NewExpression') {
-            hasSideEffect = true;
-          } else if (node.type in modifierNodes) {
-            var subject = node[modifierNodes[node.type]];
-            while (subject.type === 'MemberExpression') subject = subject.object;
-
-            var declaration = statement.module.trace(subject.name);
-
-            if (!declaration || declaration.isExternal || declaration.statement.isIncluded) {
-              hasSideEffect = true;
-            }
-          }
-
-          if (hasSideEffect) this.skip();
-        }
-      });
-
-      if (hasSideEffect) statement.mark();
-      return hasSideEffect;
-    };
-
-    Statement.prototype.source = function source() {
-      return this.module.source.slice(this.start, this.end);
-    };
-
-    Statement.prototype.toString = function toString() {
-      return this.module.magicString.slice(this.start, this.end);
-    };
-
-    return Statement;
-  })();
-
-  var reservedWords = 'break case class catch const continue debugger default delete do else export extends finally for function if import in instanceof let new return super switch this throw try typeof var void while with yield enum await implements package protected static interface private public'.split(' ');
-  var builtins = 'Infinity NaN undefined null true false eval uneval isFinite isNaN parseFloat parseInt decodeURI decodeURIComponent encodeURI encodeURIComponent escape unescape Object Function Boolean Symbol Error EvalError InternalError RangeError ReferenceError SyntaxError TypeError URIError Number Math Date String RegExp Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array Map Set WeakMap WeakSet SIMD ArrayBuffer DataView JSON Promise Generator GeneratorFunction Reflect Proxy Intl'.split(' ');
-
-  var blacklisted = blank();
-  reservedWords.concat(builtins).forEach(function (word) {
-    return blacklisted[word] = true;
-  });
-  function makeLegalIdentifier(str) {
-    str = str.replace(/-(\w)/g, function (_, letter) {
-      return letter.toUpperCase();
-    }).replace(/[^$_a-zA-Z0-9]/g, '_');
-
-    if (/\d/.test(str[0]) || blacklisted[str]) str = '_' + str;
-
-    return str;
-  }
-
-  var SyntheticDefaultDeclaration = (function () {
-    function SyntheticDefaultDeclaration(node, statement, name) {
-      babelHelpers_classCallCheck(this, SyntheticDefaultDeclaration);
-
-      this.node = node;
-      this.statement = statement;
-      this.name = name;
-
-      this.original = null;
-      this.isExported = false;
-      this.aliases = [];
-    }
-
-    SyntheticDefaultDeclaration.prototype.addAlias = function addAlias(declaration) {
-      this.aliases.push(declaration);
-    };
-
-    SyntheticDefaultDeclaration.prototype.addReference = function addReference(reference) {
-      reference.declaration = this;
-      this.name = reference.name;
-    };
-
-    SyntheticDefaultDeclaration.prototype.bind = function bind(declaration) {
-      this.original = declaration;
-    };
-
-    SyntheticDefaultDeclaration.prototype.render = function render() {
-      return !this.original || this.original.isReassigned ? this.name : this.original.render();
-    };
-
-    SyntheticDefaultDeclaration.prototype.use = function use() {
-      this.isUsed = true;
-      this.statement.mark();
-
-      if (this.original) this.original.use();
-
-      this.aliases.forEach(function (alias) {
-        return alias.use();
-      });
-    };
-
-    return SyntheticDefaultDeclaration;
-  })();
-
-  var SyntheticNamespaceDeclaration = (function () {
-    function SyntheticNamespaceDeclaration(module) {
-      var _this = this;
-
-      babelHelpers_classCallCheck(this, SyntheticNamespaceDeclaration);
-
-      this.module = module;
-      this.name = null;
-
-      this.needsNamespaceBlock = false;
-      this.aliases = [];
-
-      this.originals = blank();
-      module.getExports().forEach(function (name) {
-        _this.originals[name] = module.traceExport(name);
-      });
-    }
-
-    SyntheticNamespaceDeclaration.prototype.addAlias = function addAlias(declaration) {
-      this.aliases.push(declaration);
-    };
-
-    SyntheticNamespaceDeclaration.prototype.addReference = function addReference(reference) {
-      // if we have e.g. `foo.bar`, we can optimise
-      // the reference by pointing directly to `bar`
-      if (reference.parts.length) {
-        reference.name = reference.parts.shift();
-
-        reference.end += reference.name.length + 1; // TODO this is brittle
-
-        var original = this.originals[reference.name];
-
-        // throw with an informative error message if the reference doesn't exist.
-        if (!original) {
-          var err = new Error('Export \'' + reference.name + '\' is not defined by \'' + this.module.id + '\'');
-          err.code = 'MISSING_EXPORT';
-          err.file = this.module.id;
-          throw err;
-        }
-
-        original.addReference(reference);
-        return;
-      }
-
-      // otherwise we're accessing the namespace directly,
-      // which means we need to mark all of this module's
-      // exports and render a namespace block in the bundle
-      if (!this.needsNamespaceBlock) {
-        this.needsNamespaceBlock = true;
-        this.module.bundle.internalNamespaces.push(this);
-      }
-
-      reference.declaration = this;
-      this.name = reference.name;
-    };
-
-    SyntheticNamespaceDeclaration.prototype.renderBlock = function renderBlock(indentString) {
-      var _this2 = this;
-
-      var members = keys(this.originals).map(function (name) {
-        var original = _this2.originals[name];
-
-        if (original.isReassigned) {
-          return indentString + 'get ' + name + ' () { return ' + original.render() + '; }';
-        }
-
-        return '' + indentString + name + ': ' + original.render();
-      });
-
-      return 'var ' + this.render() + ' = {\n' + members.join(',\n') + '\n};\n\n';
-    };
-
-    SyntheticNamespaceDeclaration.prototype.render = function render() {
-      return this.name;
-    };
-
-    SyntheticNamespaceDeclaration.prototype.use = function use() {
-      var _this3 = this;
-
-      keys(this.originals).forEach(function (name) {
-        _this3.originals[name].use();
-      });
-
-      this.aliases.forEach(function (alias) {
-        return alias.use();
-      });
-    };
-
-    return SyntheticNamespaceDeclaration;
-  })();
-
-  var Module = (function () {
-    function Module(_ref) {
-      var id = _ref.id;
-      var code = _ref.code;
-      var originalCode = _ref.originalCode;
-      var ast = _ref.ast;
-      var sourceMapChain = _ref.sourceMapChain;
-      var bundle = _ref.bundle;
-      babelHelpers_classCallCheck(this, Module);
-
-      this.code = code;
-      this.originalCode = originalCode;
-      this.sourceMapChain = sourceMapChain;
-
-      this.bundle = bundle;
-      this.id = id;
-
-      // all dependencies
-      this.dependencies = [];
-      this.resolvedIds = blank();
-
-      // imports and exports, indexed by local name
-      this.imports = blank();
-      this.exports = blank();
-      this.reexports = blank();
-
-      this.exportAllSources = [];
-      this.exportAllModules = null;
-
-      // By default, `id` is the filename. Custom resolvers and loaders
-      // can change that, but it makes sense to use it for the source filename
-      this.magicString = new MagicString(code, {
-        filename: id,
-        indentExclusionRanges: []
-      });
-
-      // remove existing sourceMappingURL comments
-      var pattern = new RegExp('\\/\\/#\\s+' + SOURCEMAPPING_URL$1 + '=.+\\n?', 'g');
-      var match = undefined;
-      while (match = pattern.exec(code)) {
-        this.magicString.remove(match.index, match.index + match[0].length);
-      }
-
-      this.comments = [];
-      this.statements = this.parse(ast);
-
-      this.declarations = blank();
-      this.analyse();
-    }
-
-    Module.prototype.addExport = function addExport(statement) {
-      var _this4 = this;
-
-      var node = statement.node;
-      var source = node.source && node.source.value;
-
-      // export { name } from './other'
-      if (source) {
-        if (! ~this.dependencies.indexOf(source)) this.dependencies.push(source);
-
-        if (node.type === 'ExportAllDeclaration') {
-          // Store `export * from '...'` statements in an array of delegates.
-          // When an unknown import is encountered, we see if one of them can satisfy it.
-          this.exportAllSources.push(source);
-        } else {
-          node.specifiers.forEach(function (specifier) {
-            _this4.reexports[specifier.exported.name] = {
-              source: source,
-              localName: specifier.local.name,
-              module: null // filled in later
-            };
-          });
-        }
-      }
-
-      // export default function foo () {}
-      // export default foo;
-      // export default 42;
-      else if (node.type === 'ExportDefaultDeclaration') {
-          var identifier = node.declaration.id && node.declaration.id.name || node.declaration.name;
-
-          this.exports.default = {
-            localName: 'default',
-            identifier: identifier
-          };
-
-          // create a synthetic declaration
-          this.declarations.default = new SyntheticDefaultDeclaration(node, statement, identifier || this.basename());
-        }
-
-        // export { foo, bar, baz }
-        // export var foo = 42;
-        // export var a = 1, b = 2, c = 3;
-        // export function foo () {}
-        else if (node.type === 'ExportNamedDeclaration') {
-            if (node.specifiers.length) {
-              // export { foo, bar, baz }
-              node.specifiers.forEach(function (specifier) {
-                var localName = specifier.local.name;
-                var exportedName = specifier.exported.name;
-
-                _this4.exports[exportedName] = { localName: localName };
-              });
-            } else {
-              var declaration = node.declaration;
-
-              var _name = undefined;
-
-              if (declaration.type === 'VariableDeclaration') {
-                // export var foo = 42
-                _name = declaration.declarations[0].id.name;
-              } else {
-                // export function foo () {}
-                _name = declaration.id.name;
-              }
-
-              this.exports[_name] = { localName: _name };
-            }
-          }
-    };
-
-    Module.prototype.addImport = function addImport(statement) {
-      var _this5 = this;
-
-      var node = statement.node;
-      var source = node.source.value;
-
-      if (! ~this.dependencies.indexOf(source)) this.dependencies.push(source);
-
-      node.specifiers.forEach(function (specifier) {
-        var localName = specifier.local.name;
-
-        if (_this5.imports[localName]) {
-          var err = new Error('Duplicated import \'' + localName + '\'');
-          err.file = _this5.id;
-          err.loc = getLocation(_this5.code, specifier.start);
-          throw err;
-        }
-
-        var isDefault = specifier.type === 'ImportDefaultSpecifier';
-        var isNamespace = specifier.type === 'ImportNamespaceSpecifier';
-
-        var name = isDefault ? 'default' : isNamespace ? '*' : specifier.imported.name;
-        _this5.imports[localName] = { source: source, name: name, module: null };
-      });
-    };
-
-    Module.prototype.analyse = function analyse() {
-      var _this6 = this;
-
-      // discover this module's imports and exports
-      this.statements.forEach(function (statement) {
-        if (statement.isImportDeclaration) _this6.addImport(statement);else if (statement.isExportDeclaration) _this6.addExport(statement);
-
-        statement.analyse();
-
-        statement.scope.eachDeclaration(function (name, declaration) {
-          _this6.declarations[name] = declaration;
-        });
-      });
-    };
-
-    Module.prototype.basename = function basename() {
-      var base = _basename(this.id);
-      var ext = extname(this.id);
-
-      return makeLegalIdentifier(ext ? base.slice(0, -ext.length) : base);
-    };
-
-    Module.prototype.bindAliases = function bindAliases() {
-      var _this7 = this;
-
-      keys(this.declarations).forEach(function (name) {
-        if (name === '*') return;
-
-        var declaration = _this7.declarations[name];
-        var statement = declaration.statement;
-
-        if (statement.node.type !== 'VariableDeclaration') return;
-
-        statement.references.forEach(function (reference) {
-          if (reference.name === name || !reference.isImmediatelyUsed) return;
-
-          var otherDeclaration = _this7.trace(reference.name);
-          if (otherDeclaration) otherDeclaration.addAlias(declaration);
-        });
-      });
-    };
-
-    Module.prototype.bindImportSpecifiers = function bindImportSpecifiers() {
-      var _this8 = this;
-
-      [this.imports, this.reexports].forEach(function (specifiers) {
-        keys(specifiers).forEach(function (name) {
-          var specifier = specifiers[name];
-
-          var id = _this8.resolvedIds[specifier.source];
-          specifier.module = _this8.bundle.moduleById[id];
-        });
-      });
-
-      this.exportAllModules = this.exportAllSources.map(function (source) {
-        var id = _this8.resolvedIds[source];
-        return _this8.bundle.moduleById[id];
-      });
-    };
-
-    Module.prototype.bindReferences = function bindReferences() {
-      var _this9 = this;
-
-      if (this.declarations.default) {
-        if (this.exports.default.identifier) {
-          var declaration = this.trace(this.exports.default.identifier);
-          if (declaration) this.declarations.default.bind(declaration);
-        }
-      }
-
-      this.statements.forEach(function (statement) {
-        // skip `export { foo, bar, baz }`...
-        if (statement.node.type === 'ExportNamedDeclaration' && statement.node.specifiers.length) {
-          // ...unless this is the entry module
-          if (_this9 !== _this9.bundle.entryModule) return;
-        }
-
-        statement.references.forEach(function (reference) {
-          var declaration = reference.scope.findDeclaration(reference.name) || _this9.trace(reference.name);
-
-          if (declaration) {
-            declaration.addReference(reference);
-          } else {
-            // TODO handle globals
-            _this9.bundle.assumedGlobals[reference.name] = true;
-          }
-        });
-      });
-    };
-
-    Module.prototype.consolidateDependencies = function consolidateDependencies() {
-      var _this10 = this;
-
-      var strongDependencies = blank();
-      var weakDependencies = blank();
-
-      // treat all imports as weak dependencies
-      this.dependencies.forEach(function (source) {
-        var id = _this10.resolvedIds[source];
-        var dependency = _this10.bundle.moduleById[id];
-
-        if (!dependency.isExternal) {
-          weakDependencies[dependency.id] = dependency;
-        }
-      });
-
-      // identify strong dependencies to break ties in case of cycles
-      this.statements.forEach(function (statement) {
-        statement.references.forEach(function (reference) {
-          var declaration = reference.declaration;
-
-          if (declaration && declaration.statement) {
-            var _module = declaration.statement.module;
-            if (_module === _this10) return;
-
-            // TODO disregard function declarations
-            if (reference.isImmediatelyUsed) {
-              strongDependencies[_module.id] = _module;
-            }
-          }
-        });
-      });
-
-      return { strongDependencies: strongDependencies, weakDependencies: weakDependencies };
-    };
-
-    Module.prototype.getExports = function getExports() {
-      var exports = blank();
-
-      keys(this.exports).forEach(function (name) {
-        exports[name] = true;
-      });
-
-      keys(this.reexports).forEach(function (name) {
-        exports[name] = true;
-      });
-
-      this.exportAllModules.forEach(function (module) {
-        module.getExports().forEach(function (name) {
-          if (name !== 'default') exports[name] = true;
-        });
-      });
-
-      return keys(exports);
-    };
-
-    Module.prototype.markAllSideEffects = function markAllSideEffects() {
-      var hasSideEffect = false;
-
-      this.statements.forEach(function (statement) {
-        if (statement.markSideEffect()) hasSideEffect = true;
-      });
-
-      return hasSideEffect;
-    };
-
-    Module.prototype.namespace = function namespace() {
-      if (!this.declarations['*']) {
-        this.declarations['*'] = new SyntheticNamespaceDeclaration(this);
-      }
-
-      return this.declarations['*'];
-    };
-
-    Module.prototype.parse = function parse$$(ast) {
-      var _this11 = this;
-
-      // The ast can be supplied programmatically (but usually won't be)
-      if (!ast) {
-        // Try to extract a list of top-level statements/declarations. If
-        // the parse fails, attach file info and abort
-        try {
-          ast = parse(this.code, {
-            ecmaVersion: 6,
-            sourceType: 'module',
-            onComment: function (block, text, start, end) {
-              return _this11.comments.push({ block: block, text: text, start: start, end: end });
-            },
-            preserveParens: true
-          });
-        } catch (err) {
-          err.code = 'PARSE_ERROR';
-          err.file = this.id; // see above - not necessarily true, but true enough
-          err.message += ' in ' + this.id;
-          throw err;
-        }
-      }
-
-      walk(ast, {
-        enter: function (node) {
-          _this11.magicString.addSourcemapLocation(node.start);
-          _this11.magicString.addSourcemapLocation(node.end);
-        }
-      });
-
-      var statements = [];
-      var lastChar = 0;
-      var commentIndex = 0;
-
-      ast.body.forEach(function (node) {
-        if (node.type === 'EmptyStatement') return;
-
-        if (node.type === 'ExportNamedDeclaration' && node.declaration && node.declaration.type === 'VariableDeclaration' && node.declaration.declarations && node.declaration.declarations.length > 1) {
-          // push a synthetic export declaration
-          var syntheticNode = {
-            type: 'ExportNamedDeclaration',
-            specifiers: node.declaration.declarations.map(function (declarator) {
-              var id = { name: declarator.id.name };
-              return {
-                local: id,
-                exported: id
-              };
-            }),
-            isSynthetic: true
-          };
-
-          var statement = new Statement(syntheticNode, _this11, node.start, node.start);
-          statements.push(statement);
-
-          _this11.magicString.remove(node.start, node.declaration.start);
-          node = node.declaration;
-        }
-
-        // special case - top-level var declarations with multiple declarators
-        // should be split up. Otherwise, we may end up including code we
-        // don't need, just because an unwanted declarator is included
-        if (node.type === 'VariableDeclaration' && node.declarations.length > 1) {
-          // remove the leading var/let/const... UNLESS the previous node
-          // was also a synthetic node, in which case it'll get removed anyway
-          var lastStatement = statements[statements.length - 1];
-          if (!lastStatement || !lastStatement.node.isSynthetic) {
-            _this11.magicString.remove(node.start, node.declarations[0].start);
-          }
-
-          node.declarations.forEach(function (declarator) {
-            var start = declarator.start;
-            var end = declarator.end;
-
-            var syntheticNode = {
-              type: 'VariableDeclaration',
-              kind: node.kind,
-              start: start,
-              end: end,
-              declarations: [declarator],
-              isSynthetic: true
-            };
-
-            var statement = new Statement(syntheticNode, _this11, start, end);
-            statements.push(statement);
-          });
-
-          lastChar = node.end; // TODO account for trailing line comment
-        } else {
-            var comment = undefined;
-            do {
-              comment = _this11.comments[commentIndex];
-              if (!comment) break;
-              if (comment.start > node.start) break;
-              commentIndex += 1;
-            } while (comment.end < lastChar);
-
-            var start = comment ? Math.min(comment.start, node.start) : node.start;
-            var end = node.end; // TODO account for trailing line comment
-
-            var statement = new Statement(node, _this11, start, end);
-            statements.push(statement);
-
-            lastChar = end;
-          }
-      });
-
-      var i = statements.length;
-      var next = this.code.length;
-      while (i--) {
-        statements[i].next = next;
-        if (!statements[i].isSynthetic) next = statements[i].start;
-      }
-
-      return statements;
-    };
-
-    Module.prototype.render = function render(es6) {
-      var _this12 = this;
-
-      var magicString = this.magicString.clone();
-
-      this.statements.forEach(function (statement) {
-        if (!statement.isIncluded) {
-          magicString.remove(statement.start, statement.next);
-          return;
-        }
-
-        statement.stringLiteralRanges.forEach(function (range) {
-          return magicString.indentExclusionRanges.push(range);
-        });
-
-        // skip `export { foo, bar, baz }`
-        if (statement.node.type === 'ExportNamedDeclaration') {
-          if (statement.node.isSynthetic) return;
-
-          // skip `export { foo, bar, baz }`
-          if (statement.node.specifiers.length) {
-            magicString.remove(statement.start, statement.next);
-            return;
-          }
-        }
-
-        // split up/remove var declarations as necessary
-        if (statement.node.isSynthetic) {
-          // insert `var/let/const` if necessary
-          var declaration = _this12.declarations[statement.node.declarations[0].id.name];
-          if (!(declaration.isExported && declaration.isReassigned)) {
-            // TODO encapsulate this
-            magicString.insert(statement.start, statement.node.kind + ' ');
-          }
-
-          magicString.overwrite(statement.end, statement.next, ';\n'); // TODO account for trailing newlines
-        }
-
-        var toDeshadow = blank();
-
-        statement.references.forEach(function (reference) {
-          var declaration = reference.declaration;
-
-          if (declaration) {
-            var start = reference.start;
-            var end = reference.end;
-
-            var _name2 = declaration.render(es6);
-
-            // the second part of this check is necessary because of
-            // namespace optimisation – name of `foo.bar` could be `bar`
-            if (reference.name === _name2 && _name2.length === reference.end - reference.start) return;
-
-            reference.rewritten = true;
-
-            // prevent local variables from shadowing renamed references
-            var identifier = _name2.match(/[^\.]+/)[0];
-            if (reference.scope.contains(identifier)) {
-              toDeshadow[identifier] = identifier + '$$'; // TODO more robust mechanism
-            }
-
-            if (reference.isShorthandProperty) {
-              magicString.insert(end, ': ' + _name2);
-            } else {
-              magicString.overwrite(start, end, _name2, true);
-            }
-          }
-        });
-
-        if (keys(toDeshadow).length) {
-          statement.references.forEach(function (reference) {
-            if (!reference.rewritten && reference.name in toDeshadow) {
-              magicString.overwrite(reference.start, reference.end, toDeshadow[reference.name], true);
-            }
-          });
-        }
-
-        // modify exports as necessary
-        if (statement.isExportDeclaration) {
-          // remove `export` from `export var foo = 42`
-          if (statement.node.type === 'ExportNamedDeclaration' && statement.node.declaration.type === 'VariableDeclaration') {
-            var _name3 = statement.node.declaration.declarations[0].id.name;
-            var declaration = _this12.declarations[_name3];
-
-            var end = declaration.isExported && declaration.isReassigned ? statement.node.declaration.declarations[0].start : statement.node.declaration.start;
-
-            magicString.remove(statement.node.start, end);
-          } else if (statement.node.type === 'ExportAllDeclaration') {
-            // TODO: remove once `export * from 'external'` is supported.
-            magicString.remove(statement.start, statement.next);
-          }
-
-          // remove `export` from `export class Foo {...}` or `export default Foo`
-          // TODO default exports need different treatment
-          else if (statement.node.declaration.id) {
-              magicString.remove(statement.node.start, statement.node.declaration.start);
-            } else if (statement.node.type === 'ExportDefaultDeclaration') {
-              var defaultDeclaration = _this12.declarations.default;
-
-              // prevent `var foo = foo`
-              if (defaultDeclaration.original && !defaultDeclaration.original.isReassigned) {
-                magicString.remove(statement.start, statement.next);
-                return;
-              }
-
-              var defaultName = defaultDeclaration.render();
-
-              // prevent `var undefined = sideEffectyDefault(foo)`
-              if (!defaultDeclaration.isExported && !defaultDeclaration.isUsed) {
-                magicString.remove(statement.start, statement.node.declaration.start);
-                return;
-              }
-
-              // anonymous functions should be converted into declarations
-              if (statement.node.declaration.type === 'FunctionExpression') {
-                magicString.overwrite(statement.node.start, statement.node.declaration.start + 8, 'function ' + defaultName);
-              } else {
-                magicString.overwrite(statement.node.start, statement.node.declaration.start, 'var ' + defaultName + ' = ');
-              }
-            } else {
-              throw new Error('Unhandled export');
-            }
-        }
-      });
-
-      // add namespace block if necessary
-      var namespace = this.declarations['*'];
-      if (namespace && namespace.needsNamespaceBlock) {
-        magicString.append('\n\n' + namespace.renderBlock(magicString.getIndentString()));
-      }
-
-      return magicString.trim();
-    };
-
-    Module.prototype.trace = function trace(name) {
-      if (name in this.declarations) return this.declarations[name];
-      if (name in this.imports) {
-        var importDeclaration = this.imports[name];
-        var otherModule = importDeclaration.module;
-
-        if (importDeclaration.name === '*' && !otherModule.isExternal) {
-          return otherModule.namespace();
-        }
-
-        return otherModule.traceExport(importDeclaration.name, this);
-      }
-
-      return null;
-    };
-
-    Module.prototype.traceExport = function traceExport(name, importer) {
-      // export { foo } from './other'
-      var reexportDeclaration = this.reexports[name];
-      if (reexportDeclaration) {
-        return reexportDeclaration.module.traceExport(reexportDeclaration.localName, this);
-      }
-
-      var exportDeclaration = this.exports[name];
-      if (exportDeclaration) {
-        return this.trace(exportDeclaration.localName);
-      }
-
-      for (var i = 0; i < this.exportAllModules.length; i += 1) {
-        var _module2 = this.exportAllModules[i];
-        var declaration = _module2.traceExport(name, this);
-
-        if (declaration) return declaration;
-      }
-
-      var errorMessage = 'Module ' + this.id + ' does not export ' + name;
-      if (importer) errorMessage += ' (imported by ' + importer.id + ')';
-
-      throw new Error(errorMessage);
-    };
-
-    return Module;
-  })();
-
-  var ExternalDeclaration = (function () {
-    function ExternalDeclaration(module, name) {
-      babelHelpers_classCallCheck(this, ExternalDeclaration);
-
-      this.module = module;
-      this.name = name;
-      this.isExternal = true;
-    }
-
-    ExternalDeclaration.prototype.addAlias = function addAlias() {
-      // noop
-    };
-
-    ExternalDeclaration.prototype.addReference = function addReference(reference) {
-      reference.declaration = this;
-
-      if (this.name === 'default' || this.name === '*') {
-        this.module.suggestName(reference.name);
-      }
-    };
-
-    ExternalDeclaration.prototype.render = function render(es6) {
-      if (this.name === '*') {
-        return this.module.name;
-      }
-
-      if (this.name === 'default') {
-        return !es6 && this.module.exportsNames ? this.module.name + '__default' : this.module.name;
-      }
-
-      return es6 ? this.name : this.module.name + '.' + this.name;
-    };
-
-    ExternalDeclaration.prototype.use = function use() {
-      // noop?
-    };
-
-    return ExternalDeclaration;
-  })();
-
-  var ExternalModule = (function () {
-    function ExternalModule(id) {
-      babelHelpers_classCallCheck(this, ExternalModule);
-
-      this.id = id;
-      this.name = makeLegalIdentifier(id);
-
-      this.nameSuggestions = blank();
-      this.mostCommonSuggestion = 0;
-
-      this.isExternal = true;
-      this.declarations = blank();
-
-      this.exportsNames = false;
-    }
-
-    ExternalModule.prototype.suggestName = function suggestName(name) {
-      if (!this.nameSuggestions[name]) this.nameSuggestions[name] = 0;
-      this.nameSuggestions[name] += 1;
-
-      if (this.nameSuggestions[name] > this.mostCommonSuggestion) {
-        this.mostCommonSuggestion = this.nameSuggestions[name];
-        this.name = name;
-      }
-    };
-
-    ExternalModule.prototype.traceExport = function traceExport(name) {
-      if (name !== 'default' && name !== '*') {
-        this.exportsNames = true;
-      }
-
-      return this.declarations[name] || (this.declarations[name] = new ExternalDeclaration(this, name));
-    };
-
-    return ExternalModule;
-  })();
-
-  function getName(x) {
-    return x.name;
-  }
-
-  function quoteId(x) {
-    return "'" + x.id + "'";
-  }
-
-  function req(x) {
-    return "require('" + x.id + "')";
-  }
-
-  function getInteropBlock(bundle) {
-    return bundle.externalModules.map(function (module) {
-      return module.declarations.default ? module.exportsNames ? 'var ' + module.name + '__default = \'default\' in ' + module.name + ' ? ' + module.name + '[\'default\'] : ' + module.name + ';' : module.name + ' = \'default\' in ' + module.name + ' ? ' + module.name + '[\'default\'] : ' + module.name + ';' : null;
-    }).filter(Boolean).join('\n');
-  }
-
-  function getExportBlock(entryModule, exportMode) {
-    var mechanism = arguments.length <= 2 || arguments[2] === undefined ? 'return' : arguments[2];
-
-    if (exportMode === 'default') {
-      return mechanism + ' ' + entryModule.declarations.default.render(false) + ';';
-    }
-
-    return entryModule.getExports().map(function (name) {
-      var prop = name === 'default' ? '[\'default\']' : '.' + name;
-      var declaration = entryModule.traceExport(name);
-
-      var lhs = 'exports' + prop;
-      var rhs = declaration.render(false);
-
-      // prevent `exports.count = exports.count`
-      if (lhs === rhs) return null;
-
-      return lhs + ' = ' + rhs + ';';
-    }).filter(Boolean).join('\n');
-  }
-
-  function umd(bundle, magicString, _ref, options) {
-    var exportMode = _ref.exportMode;
-    var indentString = _ref.indentString;
-
-    if (exportMode !== 'none' && !options.moduleName) {
-      throw new Error('You must supply options.moduleName for UMD bundles');
-    }
-
-    var globalNames = options.globals || blank();
-
-    var amdDeps = bundle.externalModules.map(quoteId);
-    var cjsDeps = bundle.externalModules.map(req);
-    var globalDeps = bundle.externalModules.map(function (module) {
-      return 'global.' + (globalNames[module.id] || module.name);
-    });
-
-    var args = bundle.externalModules.map(getName);
-
-    if (exportMode === 'named') {
-      amdDeps.unshift('\'exports\'');
-      cjsDeps.unshift('exports');
-      globalDeps.unshift('(global.' + options.moduleName + ' = {})');
-
-      args.unshift('exports');
-    }
-
-    var amdParams = (options.moduleId ? '\'' + options.moduleId + '\', ' : '') + (amdDeps.length ? '[' + amdDeps.join(', ') + '], ' : '');
-
-    var cjsExport = exportMode === 'default' ? 'module.exports = ' : '';
-    var defaultExport = exportMode === 'default' ? 'global.' + options.moduleName + ' = ' : '';
-
-    var useStrict = options.useStrict !== false ? ' \'use strict\';' : '';
-
-    var intro = ('(function (global, factory) {\n\t\t\ttypeof exports === \'object\' && typeof module !== \'undefined\' ? ' + cjsExport + 'factory(' + cjsDeps.join(', ') + ') :\n\t\t\ttypeof define === \'function\' && define.amd ? define(' + amdParams + 'factory) :\n\t\t\t' + defaultExport + 'factory(' + globalDeps + ');\n\t\t}(this, function (' + args + ') {' + useStrict + '\n\n\t\t').replace(/^\t\t/gm, '').replace(/^\t/gm, magicString.getIndentString());
-
-    // var foo__default = 'default' in foo ? foo['default'] : foo;
-    var interopBlock = getInteropBlock(bundle);
-    if (interopBlock) magicString.prepend(interopBlock + '\n\n');
-
-    var exportBlock = getExportBlock(bundle.entryModule, exportMode);
-    if (exportBlock) magicString.append('\n\n' + exportBlock);
-
-    return magicString.trim().indent(indentString).append('\n\n}));').prepend(intro);
-  }
-
-  function iife(bundle, magicString, _ref, options) {
-    var exportMode = _ref.exportMode;
-    var indentString = _ref.indentString;
-
-    var globalNames = options.globals || blank();
-
-    var dependencies = bundle.externalModules.map(function (module) {
-      return globalNames[module.id] || module.name;
-    });
-
-    var args = bundle.externalModules.map(getName);
-
-    if (exportMode !== 'none' && !options.moduleName) {
-      throw new Error('You must supply options.moduleName for IIFE bundles');
-    }
-
-    if (exportMode === 'named') {
-      dependencies.unshift('(this.' + options.moduleName + ' = {})');
-      args.unshift('exports');
-    }
-
-    var useStrict = options.useStrict !== false ? ' \'use strict\';' : '';
-    var intro = '(function (' + args + ') {' + useStrict + '\n\n';
-    var outro = '\n\n})(' + dependencies + ');';
-
-    if (exportMode === 'default') {
-      intro = 'var ' + options.moduleName + ' = ' + intro;
-    }
-
-    // var foo__default = 'default' in foo ? foo['default'] : foo;
-    var interopBlock = getInteropBlock(bundle);
-    if (interopBlock) magicString.prepend(interopBlock + '\n\n');
-
-    var exportBlock = getExportBlock(bundle.entryModule, exportMode);
-    if (exportBlock) magicString.append('\n\n' + exportBlock);
-
-    return magicString.indent(indentString).prepend(intro).append(outro);
-  }
-
-  function notDefault(name) {
-    return name !== 'default';
-  }
-  function es6(bundle, magicString) {
-    var importBlock = bundle.externalModules.map(function (module) {
-      var specifiers = [];
-      var importedNames = keys(module.declarations).filter(function (name) {
-        return name !== '*' && name !== 'default';
-      });
-
-      if (module.declarations.default) {
-        specifiers.push(module.name);
-      }
-
-      if (module.declarations['*']) {
-        specifiers.push('* as ' + module.name);
-      }
-
-      if (importedNames.length) {
-        specifiers.push('{ ' + importedNames.join(', ') + ' }');
-      }
-
-      return specifiers.length ? 'import ' + specifiers.join(', ') + ' from \'' + module.id + '\';' : 'import \'' + module.id + '\';';
-    }).join('\n');
-
-    if (importBlock) {
-      magicString.prepend(importBlock + '\n\n');
-    }
-
-    var module = bundle.entryModule;
-
-    var specifiers = module.getExports().filter(notDefault).map(function (name) {
-      var declaration = module.traceExport(name);
-
-      return declaration.name === name ? name : declaration.name + ' as ' + name;
-    });
-
-    var exportBlock = specifiers.length ? 'export { ' + specifiers.join(', ') + ' };' : '';
-
-    var defaultExport = module.exports.default || module.reexports.default;
-    if (defaultExport) {
-      exportBlock += 'export default ' + module.traceExport('default').name + ';';
-    }
-
-    if (exportBlock) {
-      magicString.append('\n\n' + exportBlock.trim());
-    }
-
-    return magicString.trim();
-  }
-
-  function cjs(bundle, magicString, _ref, options) {
-    var exportMode = _ref.exportMode;
-
-    var intro = options.useStrict === false ? '' : '\'use strict\';\n\n';
-
-    // TODO handle empty imports, once they're supported
-    var importBlock = bundle.externalModules.map(function (module) {
-      var requireStatement = 'var ' + module.name + ' = require(\'' + module.id + '\');';
-
-      if (module.declarations.default) {
-        requireStatement += '\n' + (module.exportsNames ? 'var ' + module.name + '__default = ' : module.name + ' = ') + ('\'default\' in ' + module.name + ' ? ' + module.name + '[\'default\'] : ' + module.name + ';');
-      }
-
-      return requireStatement;
-    }).join('\n');
-
-    if (importBlock) {
-      intro += importBlock + '\n\n';
-    }
-
-    magicString.prepend(intro);
-
-    var exportBlock = getExportBlock(bundle.entryModule, exportMode, 'module.exports =');
-    if (exportBlock) magicString.append('\n\n' + exportBlock);
-
-    return magicString;
-  }
-
-  function amd(bundle, magicString, _ref, options) {
-    var exportMode = _ref.exportMode;
-    var indentString = _ref.indentString;
-
-    var deps = bundle.externalModules.map(quoteId);
-    var args = bundle.externalModules.map(getName);
-
-    if (exportMode === 'named') {
-      args.unshift('exports');
-      deps.unshift('\'exports\'');
-    }
-
-    var params = (options.moduleId ? '\'' + options.moduleId + '\', ' : '') + (deps.length ? '[' + deps.join(', ') + '], ' : '');
-
-    var useStrict = options.useStrict !== false ? ' \'use strict\';' : '';
-    var intro = 'define(' + params + 'function (' + args.join(', ') + ') {' + useStrict + '\n\n';
-
-    // var foo__default = 'default' in foo ? foo['default'] : foo;
-    var interopBlock = getInteropBlock(bundle);
-    if (interopBlock) magicString.prepend(interopBlock + '\n\n');
-
-    var exportBlock = getExportBlock(bundle.entryModule, exportMode);
-    if (exportBlock) magicString.append('\n\n' + exportBlock);
-
-    return magicString.indent(indentString).append('\n\n});').prepend(intro);
-  }
-
-  var finalisers = { amd: amd, cjs: cjs, es6: es6, iife: iife, umd: umd };
-
-  function ensureArray(thing) {
-    if (Array.isArray(thing)) return thing;
-    if (thing == undefined) return [];
-    return [thing];
-  }
-
-  function dirExists(dir) {
-    try {
-      readdirSync(dir);
-      return true;
-    } catch (err) {
-      return false;
-    }
-  }
-
-  function defaultResolver(importee, importer, options) {
-    // absolute paths are left untouched
-    if (isAbsolute(importee)) return importee;
-
-    // if this is the entry point, resolve against cwd
-    if (importer === undefined) return resolve(process.cwd(), importee);
-
-    // we try to resolve external modules
-    if (importee[0] !== '.') {
-      var _importee$split = importee.split(/[\/\\]/);
-
-      var id = _importee$split[0];
-
-      // unless we want to keep it external, that is
-      if (~options.external.indexOf(id)) return null;
-
-      return options.resolveExternal(importee, importer, options);
-    }
-
-    return resolve(dirname(importer), importee).replace(/\.js$/, '') + '.js';
-  }
-
-  function defaultExternalResolver(id, importer) {
-    // for now, only node_modules is supported, and only jsnext:main
-    var root = absolutePath.exec(importer)[0];
-    var dir = dirname(importer);
-
-    // `foo` should use jsnext:main, but `foo/src/bar` shouldn't
-    var parts = id.split(/[\/\\]/);
-
-    // npm scoped packages – @user/package
-    if (parts[0][0] === '@' && parts[1]) {
-      var user = parts.shift();
-      parts[0] = user + '/' + parts[0];
-    }
-
-    while (dir !== root && dir !== '.') {
-      var modulePath = resolve(dir, 'node_modules', parts[0]);
-
-      if (dirExists(modulePath)) {
-        // `foo/src/bar`
-        if (parts.length > 1) {
-          return resolve.apply(undefined, [modulePath].concat(babelHelpers_toConsumableArray(parts.slice(1)))).replace(/\.js$/, '') + '.js';
-        }
-
-        // `foo`
-        var pkgPath = resolve(modulePath, 'package.json');
-        var pkg = undefined;
-
-        try {
-          pkg = JSON.parse(readFileSync(pkgPath, 'utf-8'));
-        } catch (err) {
-          throw new Error('Missing or malformed package.json: ' + modulePath);
-        }
-
-        var main = pkg['jsnext:main'];
-
-        if (!main) {
-          throw new Error('Package ' + id + ' (imported by ' + importer + ') does not have a jsnext:main field, and so cannot be included in your rollup. Try adding it as an external module instead (e.g. options.external = [\'' + id + '\']). See https://github.com/rollup/rollup/wiki/jsnext:main for more info');
-        }
-
-        return resolve(dirname(pkgPath), main).replace(/\.js$/, '') + '.js';
-      }
-
-      dir = dirname(dir);
-    }
-
-    throw new Error('Could not find package ' + id + ' (required by ' + importer + ')');
-  }
-
-  function defaultLoader(id) {
-    return readFileSync(id, 'utf-8');
-  }
-
-  function badExports(option, keys) {
-    throw new Error('\'' + option + '\' was specified for options.exports, but entry module has following exports: ' + keys.join(', '));
-  }
-  function getExportMode(bundle, exportMode) {
-    var exportKeys = keys(bundle.entryModule.exports).concat(keys(bundle.entryModule.reexports)).concat(bundle.entryModule.exportAllSources); // not keys, but makes our job easier this way
-
-    if (exportMode === 'default') {
-      if (exportKeys.length !== 1 || exportKeys[0] !== 'default') {
-        badExports('default', exportKeys);
-      }
-    } else if (exportMode === 'none' && exportKeys.length) {
-      badExports('none', exportKeys);
-    }
-
-    if (!exportMode || exportMode === 'auto') {
-      if (exportKeys.length === 0) {
-        exportMode = 'none';
-      } else if (exportKeys.length === 1 && exportKeys[0] === 'default') {
-        exportMode = 'default';
-      } else {
-        exportMode = 'named';
-      }
-    }
-
-    if (!/(?:default|named|none)/.test(exportMode)) {
-      throw new Error('options.exports must be \'default\', \'named\', \'none\', \'auto\', or left unspecified (defaults to \'auto\')');
-    }
-
-    return exportMode;
-  }
-
-  function getIndentString(magicString, options) {
-    if (!('indent' in options) || options.indent === true) {
-      return magicString.getIndentString();
-    }
-
-    return options.indent || '';
-  }
-
-  function unixizePath(path) {
-    return path.split(/[\/\\]/).join('/');
-  }
-
-  function transform(source, id, transformers) {
-    var sourceMapChain = [];
-
-    if (typeof source === 'string') {
-      source = {
-        code: source,
-        ast: null
-      };
-    }
-
-    var originalCode = source.code;
-    var ast = source.ast;
-
-    var code = transformers.reduce(function (previous, transformer) {
-      var result = transformer(previous, id);
-
-      if (result == null) return previous;
-
-      if (typeof result === 'string') {
-        result = {
-          code: result,
-          ast: null,
-          map: null
-        };
-      }
-
-      sourceMapChain.push(result.map);
-      ast = result.ast;
-
-      return result.code;
-    }, source.code);
-
-    return { code: code, originalCode: originalCode, ast: ast, sourceMapChain: sourceMapChain };
-  }
-
-  function decodeSegments(encodedSegments) {
-    var i = encodedSegments.length;
-    var segments = new Array(i);
-
-    while (i--) segments[i] = decode$1(encodedSegments[i]);
-    return segments;
-  }
-
-  function decode(mappings) {
-    var sourceFileIndex = 0; // second field
-    var sourceCodeLine = 0; // third field
-    var sourceCodeColumn = 0; // fourth field
-    var nameIndex = 0; // fifth field
-
-    var lines = mappings.split(';');
-    var numLines = lines.length;
-    var decoded = new Array(numLines);
-
-    var i = undefined;
-    var j = undefined;
-    var line = undefined;
-    var generatedCodeColumn = undefined;
-    var decodedLine = undefined;
-    var segments = undefined;
-    var segment = undefined;
-    var result = undefined;
-
-    for (i = 0; i < numLines; i += 1) {
-      line = lines[i];
-
-      generatedCodeColumn = 0; // first field - reset each time
-      decodedLine = [];
-
-      segments = decodeSegments(line.split(','));
-
-      for (j = 0; j < segments.length; j += 1) {
-        segment = segments[j];
-
-        if (!segment.length) {
-          break;
-        }
-
-        generatedCodeColumn += segment[0];
-
-        result = [generatedCodeColumn];
-        decodedLine.push(result);
-
-        if (segment.length === 1) {
-          // only one field!
-          break;
-        }
-
-        sourceFileIndex += segment[1];
-        sourceCodeLine += segment[2];
-        sourceCodeColumn += segment[3];
-
-        result.push(sourceFileIndex, sourceCodeLine, sourceCodeColumn);
-
-        if (segment.length === 5) {
-          nameIndex += segment[4];
-          result.push(nameIndex);
-        }
-      }
-
-      decoded[i] = decodedLine;
-    }
-
-    return decoded;
-  }
-
-  function encode(decoded) {
-    var offsets = {
-      generatedCodeColumn: 0,
-      sourceFileIndex: 0, // second field
-      sourceCodeLine: 0, // third field
-      sourceCodeColumn: 0, // fourth field
-      nameIndex: 0 // fifth field
-    };
-
-    return decoded.map(function (line) {
-      offsets.generatedCodeColumn = 0; // first field - reset each time
-      return line.map(encodeSegment).join(',');
-    }).join(';');
-
-    function encodeSegment(segment) {
-      if (!segment.length) {
-        return segment;
-      }
-
-      var result = new Array(segment.length);
-
-      result[0] = segment[0] - offsets.generatedCodeColumn;
-      offsets.generatedCodeColumn = segment[0];
-
-      if (segment.length === 1) {
-        // only one field!
-        return result;
-      }
-
-      result[1] = segment[1] - offsets.sourceFileIndex;
-      result[2] = segment[2] - offsets.sourceCodeLine;
-      result[3] = segment[3] - offsets.sourceCodeColumn;
-
-      offsets.sourceFileIndex = segment[1];
-      offsets.sourceCodeLine = segment[2];
-      offsets.sourceCodeColumn = segment[3];
-
-      if (segment.length === 5) {
-        result[4] = segment[4] - offsets.nameIndex;
-        offsets.nameIndex = segment[4];
-      }
-
-      return encode$1(result);
-    }
-  }
-
-  function traceSegment(loc, mappings) {
-    var line = loc[0];
-    var column = loc[1];
-
-    var segments = mappings[line];
-
-    if (!segments) return null;
-
-    for (var i = 0; i < segments.length; i += 1) {
-      var segment = segments[i];
-
-      if (segment[0] > column) return null;
-
-      if (segment[0] === column) {
-        if (segment[1] !== 0) {
-          throw new Error('Bad sourcemap');
-        }
-
-        return [segment[2], segment[3]];
-      }
-    }
-
-    return null;
-  }
-  function collapseSourcemaps(map, modules) {
-    var chains = modules.map(function (module) {
-      return module.sourceMapChain.map(function (map) {
-        return decode(map.mappings);
-      });
-    });
-
-    var decodedMappings = decode(map.mappings);
-
-    var tracedMappings = decodedMappings.map(function (line) {
-      var tracedLine = [];
-
-      line.forEach(function (segment) {
-        var sourceIndex = segment[1];
-        var sourceCodeLine = segment[2];
-        var sourceCodeColumn = segment[3];
-
-        var chain = chains[sourceIndex];
-
-        var i = chain.length;
-        var traced = [sourceCodeLine, sourceCodeColumn];
-
-        while (i-- && traced) {
-          traced = traceSegment(traced, chain[i]);
-        }
-
-        if (traced) {
-          tracedLine.push([segment[0], segment[1], traced[0], traced[1]
-          // TODO name?
-          ]);
-        }
-      });
-
-      return tracedLine;
-    });
-
-    map.sourcesContent = modules.map(function (module) {
-      return module.originalCode;
-    });
-    map.mappings = encode(tracedMappings);
-    return map;
-  }
-
-  var Bundle = (function () {
-    function Bundle(options) {
-      var _this = this;
-
-      babelHelpers_classCallCheck(this, Bundle);
-
-      this.entry = options.entry;
-      this.entryModule = null;
-
-      this.resolveId = first$1(ensureArray(options.resolveId).concat(defaultResolver));
-      this.load = first$1(ensureArray(options.load).concat(defaultLoader));
-
-      this.resolveOptions = {
-        external: ensureArray(options.external),
-        resolveExternal: first$1(ensureArray(options.resolveExternal).concat(defaultExternalResolver))
-      };
-
-      this.loadOptions = {};
-      this.transformers = ensureArray(options.transform);
-
-      this.pending = blank();
-      this.moduleById = blank();
-      this.modules = [];
-
-      this.externalModules = [];
-      this.internalNamespaces = [];
-
-      this.assumedGlobals = blank();
-
-      // TODO strictly speaking, this only applies with non-ES6, non-default-only bundles
-      ['module', 'exports'].forEach(function (global) {
-        return _this.assumedGlobals[global] = true;
-      });
-    }
-
-    Bundle.prototype.build = function build() {
-      var _this2 = this;
-
-      return Promise$1.resolve(this.resolveId(this.entry, undefined, this.resolveOptions)).then(function (id) {
-        return _this2.fetchModule(id);
-      }).then(function (entryModule) {
-        _this2.entryModule = entryModule;
-
-        _this2.modules.forEach(function (module) {
-          return module.bindImportSpecifiers();
-        });
-        _this2.modules.forEach(function (module) {
-          return module.bindAliases();
-        });
-        _this2.modules.forEach(function (module) {
-          return module.bindReferences();
-        });
-
-        // mark all export statements
-        entryModule.getExports().forEach(function (name) {
-          var declaration = entryModule.traceExport(name);
-          declaration.isExported = true;
-
-          if (declaration.statement) declaration.use();
-        });
-
-        var settled = false;
-        while (!settled) {
-          settled = true;
-
-          _this2.modules.forEach(function (module) {
-            if (module.markAllSideEffects()) settled = false;
-          });
-        }
-
-        _this2.orderedModules = _this2.sort();
-        _this2.deconflict();
-      });
-    };
-
-    Bundle.prototype.deconflict = function deconflict() {
-      var used = blank();
-
-      // ensure no conflicts with globals
-      keys(this.assumedGlobals).forEach(function (name) {
-        return used[name] = 1;
-      });
-
-      function getSafeName(name) {
-        if (used[name]) {
-          return name + '$' + used[name]++;
-        }
-
-        used[name] = 1;
-        return name;
-      }
-
-      this.externalModules.forEach(function (module) {
-        module.name = getSafeName(module.name);
-      });
-
-      this.modules.forEach(function (module) {
-        keys(module.declarations).forEach(function (originalName) {
-          var declaration = module.declarations[originalName];
-
-          if (originalName === 'default') {
-            if (declaration.original && !declaration.original.isReassigned) return;
-          }
-
-          declaration.name = getSafeName(declaration.name);
-        });
-      });
-    };
-
-    Bundle.prototype.fetchModule = function fetchModule(id) {
-      var _this3 = this;
-
-      // short-circuit cycles
-      if (this.pending[id]) return null;
-      this.pending[id] = true;
-
-      return Promise$1.resolve(this.load(id, this.loadOptions)).then(function (source) {
-        return transform(source, id, _this3.transformers);
-      }).then(function (source) {
-        var code = source.code;
-        var originalCode = source.originalCode;
-        var ast = source.ast;
-        var sourceMapChain = source.sourceMapChain;
-
-        var module = new Module({ id: id, code: code, originalCode: originalCode, ast: ast, sourceMapChain: sourceMapChain, bundle: _this3 });
-
-        _this3.modules.push(module);
-        _this3.moduleById[id] = module;
-
-        return _this3.fetchAllDependencies(module).then(function () {
-          return module;
-        });
-      });
-    };
-
-    Bundle.prototype.fetchAllDependencies = function fetchAllDependencies(module) {
-      var _this4 = this;
-
-      var promises = module.dependencies.map(function (source) {
-        return Promise$1.resolve(_this4.resolveId(source, module.id, _this4.resolveOptions)).then(function (resolvedId) {
-          module.resolvedIds[source] = resolvedId || source;
-
-          // external module
-          if (!resolvedId) {
-            if (!_this4.moduleById[source]) {
-              var _module = new ExternalModule(source);
-              _this4.externalModules.push(_module);
-              _this4.moduleById[source] = _module;
-            }
-          } else if (resolvedId === module.id) {
-            throw new Error('A module cannot import itself (' + resolvedId + ')');
-          } else {
-            return _this4.fetchModule(resolvedId);
-          }
-        });
-      });
-
-      return Promise$1.all(promises);
-    };
-
-    Bundle.prototype.render = function render() {
-      var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
-
-      var format = options.format || 'es6';
-
-      // Determine export mode - 'default', 'named', 'none'
-      var exportMode = getExportMode(this, options.exports);
-
-      var magicString = new MagicString.Bundle({ separator: '\n\n' });
-      var usedModules = [];
-
-      this.orderedModules.forEach(function (module) {
-        var source = module.render(format === 'es6');
-        if (source.toString().length) {
-          magicString.addSource(source);
-          usedModules.push(module);
-        }
-      });
-
-      if (options.intro) magicString.prepend(options.intro + '\n');
-      if (options.outro) magicString.append('\n' + options.outro);
-
-      var indentString = getIndentString(magicString, options);
-
-      var finalise = finalisers[format];
-      if (!finalise) throw new Error('You must specify an output type - valid options are ' + keys(finalisers).join(', '));
-
-      magicString = finalise(this, magicString.trim(), { exportMode: exportMode, indentString: indentString }, options);
-
-      if (options.banner) magicString.prepend(options.banner + '\n');
-      if (options.footer) magicString.append('\n' + options.footer);
-
-      var code = magicString.toString();
-      var map = null;
-
-      if (options.sourceMap) {
-        var file = options.sourceMapFile || options.dest;
-        map = magicString.generateMap({
-          includeContent: true,
-          file: file
-          // TODO
-        });
-
-        if (this.transformers.length) map = collapseSourcemaps(map, usedModules);
-        map.sources = map.sources.map(unixizePath);
-      }
-
-      return { code: code, map: map };
-    };
-
-    Bundle.prototype.sort = function sort() {
-      var seen = {};
-      var ordered = [];
-      var hasCycles = undefined;
-
-      var strongDeps = {};
-      var stronglyDependsOn = {};
-
-      function visit(module) {
-        if (seen[module.id]) return;
-        seen[module.id] = true;
-
-        var _module$consolidateDependencies = module.consolidateDependencies();
-
-        var strongDependencies = _module$consolidateDependencies.strongDependencies;
-        var weakDependencies = _module$consolidateDependencies.weakDependencies;
-
-        strongDeps[module.id] = [];
-        stronglyDependsOn[module.id] = {};
-
-        keys(strongDependencies).forEach(function (id) {
-          var imported = strongDependencies[id];
-
-          strongDeps[module.id].push(imported);
-
-          if (seen[id]) {
-            // we need to prevent an infinite loop, and note that
-            // we need to check for strong/weak dependency relationships
-            hasCycles = true;
-            return;
-          }
-
-          visit(imported);
-        });
-
-        keys(weakDependencies).forEach(function (id) {
-          var imported = weakDependencies[id];
-
-          if (seen[id]) {
-            // we need to prevent an infinite loop, and note that
-            // we need to check for strong/weak dependency relationships
-            hasCycles = true;
-            return;
-          }
-
-          visit(imported);
-        });
-
-        // add second (and third...) order dependencies
-        function addStrongDependencies(dependency) {
-          if (stronglyDependsOn[module.id][dependency.id]) return;
-
-          stronglyDependsOn[module.id][dependency.id] = true;
-          strongDeps[dependency.id].forEach(addStrongDependencies);
-        }
-
-        strongDeps[module.id].forEach(addStrongDependencies);
-
-        ordered.push(module);
-      }
-
-      this.modules.forEach(visit);
-
-      if (hasCycles) {
-        var unordered = ordered;
-        ordered = [];
-
-        // unordered is actually semi-ordered, as [ fewer dependencies ... more dependencies ]
-        unordered.forEach(function (module) {
-          // ensure strong dependencies of `module` that don't strongly depend on `module` go first
-          strongDeps[module.id].forEach(place);
-
-          function place(dep) {
-            if (!stronglyDependsOn[dep.id][module.id] && ! ~ordered.indexOf(dep)) {
-              strongDeps[dep.id].forEach(place);
-              ordered.push(dep);
-            }
-          }
-
-          if (! ~ordered.indexOf(module)) {
-            ordered.push(module);
-          }
-        });
-      }
-
-      return ordered;
-    };
-
-    return Bundle;
-  })();
-
-  var VERSION = '0.19.1';
-
-  function rollup(options) {
-    if (!options || !options.entry) {
-      throw new Error('You must supply options.entry to rollup');
-    }
-
-    var bundle = new Bundle(options);
-
-    return bundle.build().then(function () {
-      return {
-        imports: bundle.externalModules.map(function (module) {
-          return module.id;
-        }),
-        exports: keys(bundle.entryModule.exports),
-        modules: bundle.orderedModules.map(function (module) {
-          return { id: module.id };
-        }),
-
-        generate: function (options) {
-          return bundle.render(options);
-        },
-        write: function (options) {
-          if (!options || !options.dest) {
-            throw new Error('You must supply options.dest to bundle.write');
-          }
-
-          var dest = options.dest;
-
-          var _bundle$render = bundle.render(options);
-
-          var code = _bundle$render.code;
-          var map = _bundle$render.map;
-
-          var promises = [];
-
-          if (options.sourceMap) {
-            var url = undefined;
-
-            if (options.sourceMap === 'inline') {
-              url = map.toUrl();
-            } else {
-              url = _basename(dest) + '.map';
-              promises.push(writeFile(dest + '.map', map.toString()));
-            }
-
-            code += '\n//# ' + SOURCEMAPPING_URL$1 + '=' + url;
-          }
-
-          promises.push(writeFile(dest, code));
-          return Promise.all(promises);
-        }
-      };
-    });
-  }
-
-  exports.rollup = rollup;
-  exports.VERSION = VERSION;
-
-}));
-//# sourceMappingURL=rollup.browser.js.map
diff --git a/jooby-assets-rollup/src/main/resources/lib/rollup-0.41.6.js b/jooby-assets-rollup/src/main/resources/lib/rollup-0.41.6.js
new file mode 100644
index 0000000000..6fd4195d9b
--- /dev/null
+++ b/jooby-assets-rollup/src/main/resources/lib/rollup-0.41.6.js
@@ -0,0 +1,9998 @@
+/*
+	Rollup.js v0.41.0
+	Fri Jan 06 2017 17:01:19 GMT-0500 (EST) - commit e4682a3a476452597c7c69e19359f7e10b2275d0
+
+
+	https://github.com/rollup/rollup
+
+	Released under the MIT License.
+*/
+
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+  typeof define === 'function' && define.amd ? define(['exports'], factory) :
+  (factory((global.rollup = global.rollup || {})));
+}(this, (function (exports) { 'use strict';
+
+var DEBUG = false;
+var map = new Map;
+
+var timeStartHelper;
+var timeEndHelper;
+
+if ( typeof process === 'undefined' ) {
+	timeStartHelper = function timeStartHelper () {
+		return window.performance.now();
+	};
+
+	timeEndHelper = function timeEndHelper ( previous ) {
+		return window.performance.now() - previous;
+	};
+} else {
+	timeStartHelper = function timeStartHelper () {
+		return process.hrtime();
+	};
+
+	timeEndHelper = function timeEndHelper ( previous ) {
+		var hrtime = process.hrtime( previous );
+		return hrtime[0] * 1e3 + Math.floor( hrtime[1] / 1e6 );
+	};
+}
+
+function timeStart ( label ) {
+	if ( !map.has( label ) ) {
+		map.set( label, {
+			time: 0
+		});
+	}
+	map.get( label ).start = timeStartHelper();
+}
+
+function timeEnd ( label ) {
+	if ( map.has( label ) ) {
+		var item = map.get( label );
+		item.time += timeEndHelper( item.start );
+	}
+}
+
+function flushTime ( log ) {
+	if ( log === void 0 ) log = defaultLog;
+
+	for ( var item of map.entries() ) {
+		log( item[0], item[1].time );
+	}
+	map.clear();
+}
+
+function defaultLog ( label, time ) {
+	if ( DEBUG ) {
+		/* eslint-disable no-console */
+		console.info( '%dms: %s', time, label );
+		/* eslint-enable no-console */
+	}
+}
+
+var absolutePath = /^(?:\/|(?:[A-Za-z]:)?[\\|\/])/;
+var relativePath = /^\.?\.\//;
+
+function isAbsolute ( path ) {
+	return absolutePath.test( path );
+}
+
+function isRelative ( path ) {
+	return relativePath.test( path );
+}
+
+function normalize ( path ) {
+	return path.replace( /\\/g, '/' );
+}
+
+function basename ( path ) {
+	return path.split( /(\/|\\)/ ).pop();
+}
+
+function dirname ( path ) {
+	var match = /(\/|\\)[^\/\\]*$/.exec( path );
+	if ( !match ) return '.';
+
+	var dir = path.slice( 0, -match[0].length );
+
+	// If `dir` is the empty string, we're at root.
+	return dir ? dir : '/';
+}
+
+function extname ( path ) {
+	var match = /\.[^\.]+$/.exec( basename( path ) );
+	if ( !match ) return '';
+	return match[0];
+}
+
+function relative ( from, to ) {
+	var fromParts = from.split( /[\/\\]/ ).filter( Boolean );
+	var toParts = to.split( /[\/\\]/ ).filter( Boolean );
+
+	while ( fromParts[0] && toParts[0] && fromParts[0] === toParts[0] ) {
+		fromParts.shift();
+		toParts.shift();
+	}
+
+	while ( toParts[0] === '.' || toParts[0] === '..' ) {
+		var toPart = toParts.shift();
+		if ( toPart === '..' ) {
+			fromParts.pop();
+		}
+	}
+
+	while ( fromParts.pop() ) {
+		toParts.unshift( '..' );
+	}
+
+	return toParts.join( '/' );
+}
+
+function resolve () {
+	var paths = [], len = arguments.length;
+	while ( len-- ) paths[ len ] = arguments[ len ];
+
+	var resolvedParts = paths.shift().split( /[\/\\]/ );
+
+	paths.forEach( function (path) {
+		if ( isAbsolute( path ) ) {
+			resolvedParts = path.split( /[\/\\]/ );
+		} else {
+			var parts = path.split( /[\/\\]/ );
+
+			while ( parts[0] === '.' || parts[0] === '..' ) {
+				var part = parts.shift();
+				if ( part === '..' ) {
+					resolvedParts.pop();
+				}
+			}
+
+			resolvedParts.push.apply( resolvedParts, parts );
+		}
+	});
+
+	return resolvedParts.join( '/' ); // TODO windows...
+}
+
+var nope = function (method) { return ("Cannot use fs." + method + " inside browser"); };
+
+var lstatSync = nope( 'lstatSync' );
+var readdirSync = nope( 'readdirSync' );
+var readFileSync = nope( 'readFileSync' );
+var realpathSync = nope( 'realpathSync' );
+var writeFile = nope( 'writeFile' );
+
+var keys = Object.keys;
+
+function blank () {
+	return Object.create( null );
+}
+
+function forOwn ( object, func ) {
+	Object.keys( object ).forEach( function (key) { return func( object[ key ], key ); } );
+}
+
+function assign ( target ) {
+	var sources = [], len = arguments.length - 1;
+	while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ];
+
+	sources.forEach( function (source) {
+		for ( var key in source ) {
+			if ( source.hasOwnProperty( key ) ) target[ key ] = source[ key ];
+		}
+	});
+
+	return target;
+}
+
+function mapSequence ( array, fn ) {
+	var results = [];
+	var promise = Promise.resolve();
+
+	function next ( member, i ) {
+		return fn( member ).then( function (value) { return results[i] = value; } );
+	}
+
+	var loop = function ( i ) {
+		promise = promise.then( function () { return next( array[i], i ); } );
+	};
+
+	for ( var i = 0; i < array.length; i += 1 ) loop( i );
+
+	return promise.then( function () { return results; } );
+}
+
+function validateKeys ( actualKeys, allowedKeys ) {
+	var i = actualKeys.length;
+
+	while ( i-- ) {
+		var key = actualKeys[i];
+
+		if ( allowedKeys.indexOf( key ) === -1 ) {
+			return new Error(
+				("Unexpected key '" + key + "' found, expected one of: " + (allowedKeys.join( ', ' )))
+			);
+		}
+	}
+}
+
+function error ( props ) {
+	var err = new Error( props.message );
+
+	Object.keys( props ).forEach( function (key) {
+		err[ key ] = props[ key ];
+	});
+
+	throw err;
+}
+
+// this looks ridiculous, but it prevents sourcemap tooling from mistaking
+// this for an actual sourceMappingURL
+var SOURCEMAPPING_URL = 'sourceMa';
+SOURCEMAPPING_URL += 'ppingURL';
+
+var SOURCEMAPPING_URL_RE = new RegExp( ("^#\\s+" + SOURCEMAPPING_URL + "=.+\\n?") );
+
+var charToInteger = {};
+var integerToChar = {};
+
+'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split( '' ).forEach( function ( char, i ) {
+	charToInteger[ char ] = i;
+	integerToChar[ i ] = char;
+});
+
+function decode$1 ( string ) {
+	var result = [],
+		len = string.length,
+		i,
+		hasContinuationBit,
+		shift = 0,
+		value = 0,
+		integer,
+		shouldNegate;
+
+	for ( i = 0; i < len; i += 1 ) {
+		integer = charToInteger[ string[i] ];
+
+		if ( integer === undefined ) {
+			throw new Error( 'Invalid character (' + string[i] + ')' );
+		}
+
+		hasContinuationBit = integer & 32;
+
+		integer &= 31;
+		value += integer << shift;
+
+		if ( hasContinuationBit ) {
+			shift += 5;
+		} else {
+			shouldNegate = value & 1;
+			value >>= 1;
+
+			result.push( shouldNegate ? -value : value );
+
+			// reset
+			value = shift = 0;
+		}
+	}
+
+	return result;
+}
+
+function encode$1 ( value ) {
+	var result, i;
+
+	if ( typeof value === 'number' ) {
+		result = encodeInteger( value );
+	} else {
+		result = '';
+		for ( i = 0; i < value.length; i += 1 ) {
+			result += encodeInteger( value[i] );
+		}
+	}
+
+	return result;
+}
+
+function encodeInteger ( num ) {
+	var result = '', clamped;
+
+	if ( num < 0 ) {
+		num = ( -num << 1 ) | 1;
+	} else {
+		num <<= 1;
+	}
+
+	do {
+		clamped = num & 31;
+		num >>= 5;
+
+		if ( num > 0 ) {
+			clamped |= 32;
+		}
+
+		result += integerToChar[ clamped ];
+	} while ( num > 0 );
+
+	return result;
+}
+
+function decodeSegments(encodedSegments) {
+	var i = encodedSegments.length;
+	var segments = new Array(i);
+
+	while (i--) {
+		segments[i] = decode$1(encodedSegments[i]);
+	}return segments;
+}
+
+function decode(mappings) {
+	var sourceFileIndex = 0; // second field
+	var sourceCodeLine = 0; // third field
+	var sourceCodeColumn = 0; // fourth field
+	var nameIndex = 0; // fifth field
+
+	var lines = mappings.split(';');
+	var numLines = lines.length;
+	var decoded = new Array(numLines);
+
+	var i = undefined;
+	var j = undefined;
+	var line = undefined;
+	var generatedCodeColumn = undefined;
+	var decodedLine = undefined;
+	var segments = undefined;
+	var segment = undefined;
+	var result = undefined;
+
+	for (i = 0; i < numLines; i += 1) {
+		line = lines[i];
+
+		generatedCodeColumn = 0; // first field - reset each time
+		decodedLine = [];
+
+		segments = decodeSegments(line.split(','));
+
+		for (j = 0; j < segments.length; j += 1) {
+			segment = segments[j];
+
+			if (!segment.length) {
+				break;
+			}
+
+			generatedCodeColumn += segment[0];
+
+			result = [generatedCodeColumn];
+			decodedLine.push(result);
+
+			if (segment.length === 1) {
+				// only one field!
+				continue;
+			}
+
+			sourceFileIndex += segment[1];
+			sourceCodeLine += segment[2];
+			sourceCodeColumn += segment[3];
+
+			result.push(sourceFileIndex, sourceCodeLine, sourceCodeColumn);
+
+			if (segment.length === 5) {
+				nameIndex += segment[4];
+				result.push(nameIndex);
+			}
+		}
+
+		decoded[i] = decodedLine;
+	}
+
+	return decoded;
+}
+
+function encode(decoded) {
+	var offsets = {
+		generatedCodeColumn: 0,
+		sourceFileIndex: 0, // second field
+		sourceCodeLine: 0, // third field
+		sourceCodeColumn: 0, // fourth field
+		nameIndex: 0 // fifth field
+	};
+
+	return decoded.map(function (line) {
+		offsets.generatedCodeColumn = 0; // first field - reset each time
+		return line.map(encodeSegment).join(',');
+	}).join(';');
+
+	function encodeSegment(segment) {
+		if (!segment.length) {
+			return segment;
+		}
+
+		var result = new Array(segment.length);
+
+		result[0] = segment[0] - offsets.generatedCodeColumn;
+		offsets.generatedCodeColumn = segment[0];
+
+		if (segment.length === 1) {
+			// only one field!
+			return encode$1(result);
+		}
+
+		result[1] = segment[1] - offsets.sourceFileIndex;
+		result[2] = segment[2] - offsets.sourceCodeLine;
+		result[3] = segment[3] - offsets.sourceCodeColumn;
+
+		offsets.sourceFileIndex = segment[1];
+		offsets.sourceCodeLine = segment[2];
+		offsets.sourceCodeColumn = segment[3];
+
+		if (segment.length === 5) {
+			result[4] = segment[4] - offsets.nameIndex;
+			offsets.nameIndex = segment[4];
+		}
+
+		return encode$1(result);
+	}
+}
+
+var charToInteger$1 = {};
+var integerToChar$1 = {};
+
+'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split( '' ).forEach( function ( char, i ) {
+	charToInteger$1[ char ] = i;
+	integerToChar$1[ i ] = char;
+});
+
+
+
+function encode$1$1 ( value ) {
+	var result, i;
+
+	if ( typeof value === 'number' ) {
+		result = encodeInteger$1( value );
+	} else {
+		result = '';
+		for ( i = 0; i < value.length; i += 1 ) {
+			result += encodeInteger$1( value[i] );
+		}
+	}
+
+	return result;
+}
+
+function encodeInteger$1 ( num ) {
+	var result = '', clamped;
+
+	if ( num < 0 ) {
+		num = ( -num << 1 ) | 1;
+	} else {
+		num <<= 1;
+	}
+
+	do {
+		clamped = num & 31;
+		num >>= 5;
+
+		if ( num > 0 ) {
+			clamped |= 32;
+		}
+
+		result += integerToChar$1[ clamped ];
+	} while ( num > 0 );
+
+	return result;
+}
+
+function Chunk ( start, end, content ) {
+	this.start = start;
+	this.end = end;
+	this.original = content;
+
+	this.intro = '';
+	this.outro = '';
+
+	this.content = content;
+	this.storeName = false;
+	this.edited = false;
+
+	// we make these non-enumerable, for sanity while debugging
+	Object.defineProperties( this, {
+		previous: { writable: true, value: null },
+		next: { writable: true, value: null }
+	});
+}
+
+Chunk.prototype = {
+	append: function append ( content ) {
+		this.outro += content;
+	},
+
+	clone: function clone () {
+		var chunk = new Chunk( this.start, this.end, this.original );
+
+		chunk.intro = this.intro;
+		chunk.outro = this.outro;
+		chunk.content = this.content;
+		chunk.storeName = this.storeName;
+		chunk.edited = this.edited;
+
+		return chunk;
+	},
+
+	contains: function contains ( index ) {
+		return this.start < index && index < this.end;
+	},
+
+	eachNext: function eachNext ( fn ) {
+		var chunk = this;
+		while ( chunk ) {
+			fn( chunk );
+			chunk = chunk.next;
+		}
+	},
+
+	eachPrevious: function eachPrevious ( fn ) {
+		var chunk = this;
+		while ( chunk ) {
+			fn( chunk );
+			chunk = chunk.previous;
+		}
+	},
+
+	edit: function edit ( content, storeName ) {
+		this.content = content;
+		this.storeName = storeName;
+
+		this.edited = true;
+
+		return this;
+	},
+
+	prepend: function prepend ( content ) {
+		this.intro = content + this.intro;
+	},
+
+	split: function split ( index ) {
+		var sliceIndex = index - this.start;
+
+		var originalBefore = this.original.slice( 0, sliceIndex );
+		var originalAfter = this.original.slice( sliceIndex );
+
+		this.original = originalBefore;
+
+		var newChunk = new Chunk( index, this.end, originalAfter );
+		newChunk.outro = this.outro;
+		this.outro = '';
+
+		this.end = index;
+
+		if ( this.edited ) {
+			// TODO is this block necessary?...
+			newChunk.edit( '', false );
+			this.content = '';
+		} else {
+			this.content = originalBefore;
+		}
+
+		newChunk.next = this.next;
+		if ( newChunk.next ) newChunk.next.previous = newChunk;
+		newChunk.previous = this;
+		this.next = newChunk;
+
+		return newChunk;
+	},
+
+	toString: function toString () {
+		return this.intro + this.content + this.outro;
+	},
+
+	trimEnd: function trimEnd ( rx ) {
+		this.outro = this.outro.replace( rx, '' );
+		if ( this.outro.length ) return true;
+
+		var trimmed = this.content.replace( rx, '' );
+
+		if ( trimmed.length ) {
+			if ( trimmed !== this.content ) {
+				this.split( this.start + trimmed.length ).edit( '', false );
+			}
+
+			return true;
+		} else {
+			this.edit( '', false );
+
+			this.intro = this.intro.replace( rx, '' );
+			if ( this.intro.length ) return true;
+		}
+	},
+
+	trimStart: function trimStart ( rx ) {
+		this.intro = this.intro.replace( rx, '' );
+		if ( this.intro.length ) return true;
+
+		var trimmed = this.content.replace( rx, '' );
+
+		if ( trimmed.length ) {
+			if ( trimmed !== this.content ) {
+				this.split( this.end - trimmed.length );
+				this.edit( '', false );
+			}
+
+			return true;
+		} else {
+			this.edit( '', false );
+
+			this.outro = this.outro.replace( rx, '' );
+			if ( this.outro.length ) return true;
+		}
+	}
+};
+
+var _btoa;
+
+if ( typeof window !== 'undefined' && typeof window.btoa === 'function' ) {
+	_btoa = window.btoa;
+} else if ( typeof Buffer === 'function' ) {
+	_btoa = function (str) { return new Buffer( str ).toString( 'base64' ); };
+} else {
+	_btoa = function () {
+		throw new Error( 'Unsupported environment: `window.btoa` or `Buffer` should be supported.' );
+	};
+}
+
+var btoa = _btoa;
+
+function SourceMap ( properties ) {
+	this.version = 3;
+
+	this.file           = properties.file;
+	this.sources        = properties.sources;
+	this.sourcesContent = properties.sourcesContent;
+	this.names          = properties.names;
+	this.mappings       = properties.mappings;
+}
+
+SourceMap.prototype = {
+	toString: function toString () {
+		return JSON.stringify( this );
+	},
+
+	toUrl: function toUrl () {
+		return 'data:application/json;charset=utf-8;base64,' + btoa( this.toString() );
+	}
+};
+
+function guessIndent ( code ) {
+	var lines = code.split( '\n' );
+
+	var tabbed = lines.filter( function (line) { return /^\t+/.test( line ); } );
+	var spaced = lines.filter( function (line) { return /^ {2,}/.test( line ); } );
+
+	if ( tabbed.length === 0 && spaced.length === 0 ) {
+		return null;
+	}
+
+	// More lines tabbed than spaced? Assume tabs, and
+	// default to tabs in the case of a tie (or nothing
+	// to go on)
+	if ( tabbed.length >= spaced.length ) {
+		return '\t';
+	}
+
+	// Otherwise, we need to guess the multiple
+	var min = spaced.reduce( function ( previous, current ) {
+		var numSpaces = /^ +/.exec( current )[0].length;
+		return Math.min( numSpaces, previous );
+	}, Infinity );
+
+	return new Array( min + 1 ).join( ' ' );
+}
+
+function getLocator ( source ) {
+	var originalLines = source.split( '\n' );
+
+	var start = 0;
+	var lineRanges = originalLines.map( function ( line, i ) {
+		var end = start + line.length + 1;
+		var range = { start: start, end: end, line: i };
+
+		start = end;
+		return range;
+	});
+
+	var i = 0;
+
+	function rangeContains ( range, index ) {
+		return range.start <= index && index < range.end;
+	}
+
+	function getLocation ( range, index ) {
+		return { line: range.line, column: index - range.start };
+	}
+
+	return function locate ( index ) {
+		var range = lineRanges[i];
+
+		var d = index >= range.end ? 1 : -1;
+
+		while ( range ) {
+			if ( rangeContains( range, index ) ) return getLocation( range, index );
+
+			i += d;
+			range = lineRanges[i];
+		}
+	};
+}
+
+var nonWhitespace = /\S/;
+
+function encodeMappings ( original, intro, outro, chunk, hires, sourcemapLocations, sourceIndex, offsets, names ) {
+	var rawLines = [];
+
+	var generatedCodeLine = intro.split( '\n' ).length - 1;
+	var rawSegments = rawLines[ generatedCodeLine ] = [];
+
+	var generatedCodeColumn = 0;
+
+	var locate = getLocator( original );
+
+	function addEdit ( content, original, loc, nameIndex, i ) {
+		if ( i || ( content.length && nonWhitespace.test( content ) ) ) {
+			rawSegments.push({
+				generatedCodeLine: generatedCodeLine,
+				generatedCodeColumn: generatedCodeColumn,
+				sourceCodeLine: loc.line,
+				sourceCodeColumn: loc.column,
+				sourceCodeName: nameIndex,
+				sourceIndex: sourceIndex
+			});
+		}
+
+		var lines = content.split( '\n' );
+		var lastLine = lines.pop();
+
+		if ( lines.length ) {
+			generatedCodeLine += lines.length;
+			rawLines[ generatedCodeLine ] = rawSegments = [];
+			generatedCodeColumn = lastLine.length;
+		} else {
+			generatedCodeColumn += lastLine.length;
+		}
+
+		lines = original.split( '\n' );
+		lastLine = lines.pop();
+
+		if ( lines.length ) {
+			loc.line += lines.length;
+			loc.column = lastLine.length;
+		} else {
+			loc.column += lastLine.length;
+		}
+	}
+
+	function addUneditedChunk ( chunk, loc ) {
+		var originalCharIndex = chunk.start;
+		var first = true;
+
+		while ( originalCharIndex < chunk.end ) {
+			if ( hires || first || sourcemapLocations[ originalCharIndex ] ) {
+				rawSegments.push({
+					generatedCodeLine: generatedCodeLine,
+					generatedCodeColumn: generatedCodeColumn,
+					sourceCodeLine: loc.line,
+					sourceCodeColumn: loc.column,
+					sourceCodeName: -1,
+					sourceIndex: sourceIndex
+				});
+			}
+
+			if ( original[ originalCharIndex ] === '\n' ) {
+				loc.line += 1;
+				loc.column = 0;
+				generatedCodeLine += 1;
+				rawLines[ generatedCodeLine ] = rawSegments = [];
+				generatedCodeColumn = 0;
+			} else {
+				loc.column += 1;
+				generatedCodeColumn += 1;
+			}
+
+			originalCharIndex += 1;
+			first = false;
+		}
+	}
+
+	var hasContent = false;
+
+	while ( chunk ) {
+		var loc = locate( chunk.start );
+
+		if ( chunk.intro.length ) {
+			addEdit( chunk.intro, '', loc, -1, hasContent );
+		}
+
+		if ( chunk.edited ) {
+			addEdit( chunk.content, chunk.original, loc, chunk.storeName ? names.indexOf( chunk.original ) : -1, hasContent );
+		} else {
+			addUneditedChunk( chunk, loc );
+		}
+
+		if ( chunk.outro.length ) {
+			addEdit( chunk.outro, '', loc, -1, hasContent );
+		}
+
+		if ( chunk.content || chunk.intro || chunk.outro ) hasContent = true;
+
+		var nextChunk = chunk.next;
+		chunk = nextChunk;
+	}
+
+	offsets.sourceIndex = offsets.sourceIndex || 0;
+	offsets.sourceCodeLine = offsets.sourceCodeLine || 0;
+	offsets.sourceCodeColumn = offsets.sourceCodeColumn || 0;
+	offsets.sourceCodeName = offsets.sourceCodeName || 0;
+
+	var outroSemis = outro.split( '\n' ).map( function () { return ''; } ).join( ';' );
+
+	var encoded = rawLines.map( function (segments) {
+		var generatedCodeColumn = 0;
+
+		return segments.map( function (segment) {
+			var arr = [
+				segment.generatedCodeColumn - generatedCodeColumn,
+				segment.sourceIndex - offsets.sourceIndex,
+				segment.sourceCodeLine - offsets.sourceCodeLine,
+				segment.sourceCodeColumn - offsets.sourceCodeColumn
+			];
+
+			generatedCodeColumn = segment.generatedCodeColumn;
+			offsets.sourceIndex = segment.sourceIndex;
+			offsets.sourceCodeLine = segment.sourceCodeLine;
+			offsets.sourceCodeColumn = segment.sourceCodeColumn;
+
+			if ( ~segment.sourceCodeName ) {
+				arr.push( segment.sourceCodeName - offsets.sourceCodeName );
+				offsets.sourceCodeName = segment.sourceCodeName;
+			}
+
+			return encode$1$1( arr );
+		}).join( ',' );
+	}).join( ';' ) + outroSemis;
+
+	return encoded;
+}
+
+function getRelativePath ( from, to ) {
+	var fromParts = from.split( /[\/\\]/ );
+	var toParts = to.split( /[\/\\]/ );
+
+	fromParts.pop(); // get dirname
+
+	while ( fromParts[0] === toParts[0] ) {
+		fromParts.shift();
+		toParts.shift();
+	}
+
+	if ( fromParts.length ) {
+		var i = fromParts.length;
+		while ( i-- ) fromParts[i] = '..';
+	}
+
+	return fromParts.concat( toParts ).join( '/' );
+}
+
+var toString = Object.prototype.toString;
+
+function isObject ( thing ) {
+	return toString.call( thing ) === '[object Object]';
+}
+
+function MagicString ( string, options ) {
+	if ( options === void 0 ) options = {};
+
+	var chunk = new Chunk( 0, string.length, string );
+
+	Object.defineProperties( this, {
+		original:              { writable: true, value: string },
+		outro:                 { writable: true, value: '' },
+		intro:                 { writable: true, value: '' },
+		firstChunk:            { writable: true, value: chunk },
+		lastChunk:             { writable: true, value: chunk },
+		lastSearchedChunk:     { writable: true, value: chunk },
+		byStart:               { writable: true, value: {} },
+		byEnd:                 { writable: true, value: {} },
+		filename:              { writable: true, value: options.filename },
+		indentExclusionRanges: { writable: true, value: options.indentExclusionRanges },
+		sourcemapLocations:    { writable: true, value: {} },
+		storedNames:           { writable: true, value: {} },
+		indentStr:             { writable: true, value: guessIndent( string ) }
+	});
+
+	this.byStart[ 0 ] = chunk;
+	this.byEnd[ string.length ] = chunk;
+}
+
+MagicString.prototype = {
+	addSourcemapLocation: function addSourcemapLocation ( char ) {
+		this.sourcemapLocations[ char ] = true;
+	},
+
+	append: function append ( content ) {
+		if ( typeof content !== 'string' ) throw new TypeError( 'outro content must be a string' );
+
+		this.outro += content;
+		return this;
+	},
+
+	clone: function clone () {
+		var cloned = new MagicString( this.original, { filename: this.filename });
+
+		var originalChunk = this.firstChunk;
+		var clonedChunk = cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone();
+
+		while ( originalChunk ) {
+			cloned.byStart[ clonedChunk.start ] = clonedChunk;
+			cloned.byEnd[ clonedChunk.end ] = clonedChunk;
+
+			var nextOriginalChunk = originalChunk.next;
+			var nextClonedChunk = nextOriginalChunk && nextOriginalChunk.clone();
+
+			if ( nextClonedChunk ) {
+				clonedChunk.next = nextClonedChunk;
+				nextClonedChunk.previous = clonedChunk;
+
+				clonedChunk = nextClonedChunk;
+			}
+
+			originalChunk = nextOriginalChunk;
+		}
+
+		cloned.lastChunk = clonedChunk;
+
+		if ( this.indentExclusionRanges ) {
+			cloned.indentExclusionRanges = typeof this.indentExclusionRanges[0] === 'number' ?
+				[ this.indentExclusionRanges[0], this.indentExclusionRanges[1] ] :
+				this.indentExclusionRanges.map( function (range) { return [ range.start, range.end ]; } );
+		}
+
+		Object.keys( this.sourcemapLocations ).forEach( function (loc) {
+			cloned.sourcemapLocations[ loc ] = true;
+		});
+
+		return cloned;
+	},
+
+	generateMap: function generateMap ( options ) {
+		options = options || {};
+
+		var names = Object.keys( this.storedNames );
+
+		var map = new SourceMap({
+			file: ( options.file ? options.file.split( /[\/\\]/ ).pop() : null ),
+			sources: [ options.source ? getRelativePath( options.file || '', options.source ) : null ],
+			sourcesContent: options.includeContent ? [ this.original ] : [ null ],
+			names: names,
+			mappings: this.getMappings( options.hires, 0, {}, names )
+		});
+		return map;
+	},
+
+	getIndentString: function getIndentString () {
+		return this.indentStr === null ? '\t' : this.indentStr;
+	},
+
+	getMappings: function getMappings ( hires, sourceIndex, offsets, names ) {
+		return encodeMappings( this.original, this.intro, this.outro, this.firstChunk, hires, this.sourcemapLocations, sourceIndex, offsets, names );
+	},
+
+	indent: function indent ( indentStr, options ) {
+		var this$1 = this;
+
+		var pattern = /^[^\r\n]/gm;
+
+		if ( isObject( indentStr ) ) {
+			options = indentStr;
+			indentStr = undefined;
+		}
+
+		indentStr = indentStr !== undefined ? indentStr : ( this.indentStr || '\t' );
+
+		if ( indentStr === '' ) return this; // noop
+
+		options = options || {};
+
+		// Process exclusion ranges
+		var isExcluded = {};
+
+		if ( options.exclude ) {
+			var exclusions = typeof options.exclude[0] === 'number' ? [ options.exclude ] : options.exclude;
+			exclusions.forEach( function (exclusion) {
+				for ( var i = exclusion[0]; i < exclusion[1]; i += 1 ) {
+					isExcluded[i] = true;
+				}
+			});
+		}
+
+		var shouldIndentNextCharacter = options.indentStart !== false;
+		var replacer = function (match) {
+			if ( shouldIndentNextCharacter ) return ("" + indentStr + match);
+			shouldIndentNextCharacter = true;
+			return match;
+		};
+
+		this.intro = this.intro.replace( pattern, replacer );
+
+		var charIndex = 0;
+
+		var chunk = this.firstChunk;
+
+		while ( chunk ) {
+			var end = chunk.end;
+
+			if ( chunk.edited ) {
+				if ( !isExcluded[ charIndex ] ) {
+					chunk.content = chunk.content.replace( pattern, replacer );
+
+					if ( chunk.content.length ) {
+						shouldIndentNextCharacter = chunk.content[ chunk.content.length - 1 ] === '\n';
+					}
+				}
+			} else {
+				charIndex = chunk.start;
+
+				while ( charIndex < end ) {
+					if ( !isExcluded[ charIndex ] ) {
+						var char = this$1.original[ charIndex ];
+
+						if ( char === '\n' ) {
+							shouldIndentNextCharacter = true;
+						} else if ( char !== '\r' && shouldIndentNextCharacter ) {
+							shouldIndentNextCharacter = false;
+
+							if ( charIndex === chunk.start ) {
+								chunk.prepend( indentStr );
+							} else {
+								var rhs = chunk.split( charIndex );
+								rhs.prepend( indentStr );
+
+								this$1.byStart[ charIndex ] = rhs;
+								this$1.byEnd[ charIndex ] = chunk;
+
+								chunk = rhs;
+							}
+						}
+					}
+
+					charIndex += 1;
+				}
+			}
+
+			charIndex = chunk.end;
+			chunk = chunk.next;
+		}
+
+		this.outro = this.outro.replace( pattern, replacer );
+
+		return this;
+	},
+
+	insert: function insert () {
+		throw new Error( 'magicString.insert(...) is deprecated. Use insertRight(...) or insertLeft(...)' );
+	},
+
+	insertLeft: function insertLeft ( index, content ) {
+		if ( typeof content !== 'string' ) throw new TypeError( 'inserted content must be a string' );
+
+		this._split( index );
+
+		var chunk = this.byEnd[ index ];
+
+		if ( chunk ) {
+			chunk.append( content );
+		} else {
+			this.intro += content;
+		}
+
+		return this;
+	},
+
+	insertRight: function insertRight ( index, content ) {
+		if ( typeof content !== 'string' ) throw new TypeError( 'inserted content must be a string' );
+
+		this._split( index );
+
+		var chunk = this.byStart[ index ];
+
+		if ( chunk ) {
+			chunk.prepend( content );
+		} else {
+			this.outro += content;
+		}
+
+		return this;
+	},
+
+	move: function move ( start, end, index ) {
+		if ( index >= start && index <= end ) throw new Error( 'Cannot move a selection inside itself' );
+
+		this._split( start );
+		this._split( end );
+		this._split( index );
+
+		var first = this.byStart[ start ];
+		var last = this.byEnd[ end ];
+
+		var oldLeft = first.previous;
+		var oldRight = last.next;
+
+		var newRight = this.byStart[ index ];
+		if ( !newRight && last === this.lastChunk ) return this;
+		var newLeft = newRight ? newRight.previous : this.lastChunk;
+
+		if ( oldLeft ) oldLeft.next = oldRight;
+		if ( oldRight ) oldRight.previous = oldLeft;
+
+		if ( newLeft ) newLeft.next = first;
+		if ( newRight ) newRight.previous = last;
+
+		if ( !first.previous ) this.firstChunk = last.next;
+		if ( !last.next ) {
+			this.lastChunk = first.previous;
+			this.lastChunk.next = null;
+		}
+
+		first.previous = newLeft;
+		last.next = newRight;
+
+		if ( !newLeft ) this.firstChunk = first;
+		if ( !newRight ) this.lastChunk = last;
+
+		return this;
+	},
+
+	overwrite: function overwrite ( start, end, content, storeName ) {
+		var this$1 = this;
+
+		if ( typeof content !== 'string' ) throw new TypeError( 'replacement content must be a string' );
+
+		while ( start < 0 ) start += this$1.original.length;
+		while ( end < 0 ) end += this$1.original.length;
+
+		if ( end > this.original.length ) throw new Error( 'end is out of bounds' );
+		if ( start === end ) throw new Error( 'Cannot overwrite a zero-length range – use insertLeft or insertRight instead' );
+
+		this._split( start );
+		this._split( end );
+
+		if ( storeName ) {
+			var original = this.original.slice( start, end );
+			this.storedNames[ original ] = true;
+		}
+
+		var first = this.byStart[ start ];
+		var last = this.byEnd[ end ];
+
+		if ( first ) {
+			first.edit( content, storeName );
+
+			if ( first !== last ) {
+				first.outro = '';
+
+				var chunk = first.next;
+				while ( chunk !== last ) {
+					chunk.edit( '', false );
+					chunk.intro = chunk.outro = '';
+					chunk = chunk.next;
+				}
+
+				chunk.edit( '', false );
+				chunk.intro = '';
+			}
+		}
+
+		else {
+			// must be inserting at the end
+			var newChunk = new Chunk( start, end, '' ).edit( content, storeName );
+
+			// TODO last chunk in the array may not be the last chunk, if it's moved...
+			last.next = newChunk;
+			newChunk.previous = last;
+		}
+
+		return this;
+	},
+
+	prepend: function prepend ( content ) {
+		if ( typeof content !== 'string' ) throw new TypeError( 'outro content must be a string' );
+
+		this.intro = content + this.intro;
+		return this;
+	},
+
+	remove: function remove ( start, end ) {
+		var this$1 = this;
+
+		while ( start < 0 ) start += this$1.original.length;
+		while ( end < 0 ) end += this$1.original.length;
+
+		if ( start === end ) return this;
+
+		if ( start < 0 || end > this.original.length ) throw new Error( 'Character is out of bounds' );
+		if ( start > end ) throw new Error( 'end must be greater than start' );
+
+		return this.overwrite( start, end, '', false );
+	},
+
+	slice: function slice ( start, end ) {
+		var this$1 = this;
+		if ( start === void 0 ) start = 0;
+		if ( end === void 0 ) end = this.original.length;
+
+		while ( start < 0 ) start += this$1.original.length;
+		while ( end < 0 ) end += this$1.original.length;
+
+		var result = '';
+
+		// find start chunk
+		var chunk = this.firstChunk;
+		while ( chunk && ( chunk.start > start || chunk.end <= start ) ) {
+
+			// found end chunk before start
+			if ( chunk.start < end && chunk.end >= end ) {
+				return result;
+			}
+
+			chunk = chunk.next;
+		}
+
+		if ( chunk && chunk.edited && chunk.start !== start ) throw new Error(("Cannot use replaced character " + start + " as slice start anchor."));
+
+		var startChunk = chunk;
+		while ( chunk ) {
+			if ( chunk.intro && ( startChunk !== chunk || chunk.start === start ) ) {
+				result += chunk.intro;
+			}
+
+			var containsEnd = chunk.start < end && chunk.end >= end;
+			if ( containsEnd && chunk.edited && chunk.end !== end ) throw new Error(("Cannot use replaced character " + end + " as slice end anchor."));
+
+			var sliceStart = startChunk === chunk ? start - chunk.start : 0;
+			var sliceEnd = containsEnd ? chunk.content.length + end - chunk.end : chunk.content.length;
+
+			result += chunk.content.slice( sliceStart, sliceEnd );
+
+			if ( chunk.outro && ( !containsEnd || chunk.end === end ) ) {
+				result += chunk.outro;
+			}
+
+			if ( containsEnd ) {
+				break;
+			}
+
+			chunk = chunk.next;
+		}
+
+		return result;
+	},
+
+	// TODO deprecate this? not really very useful
+	snip: function snip ( start, end ) {
+		var clone = this.clone();
+		clone.remove( 0, start );
+		clone.remove( end, clone.original.length );
+
+		return clone;
+	},
+
+	_split: function _split ( index ) {
+		var this$1 = this;
+
+		if ( this.byStart[ index ] || this.byEnd[ index ] ) return;
+
+		var chunk = this.lastSearchedChunk;
+		var searchForward = index > chunk.end;
+
+		while ( true ) {
+			if ( chunk.contains( index ) ) return this$1._splitChunk( chunk, index );
+
+			chunk = searchForward ?
+				this$1.byStart[ chunk.end ] :
+				this$1.byEnd[ chunk.start ];
+		}
+	},
+
+	_splitChunk: function _splitChunk ( chunk, index ) {
+		if ( chunk.edited && chunk.content.length ) { // zero-length edited chunks are a special case (overlapping replacements)
+			var loc = getLocator( this.original )( index );
+			throw new Error( ("Cannot split a chunk that has already been edited (" + (loc.line) + ":" + (loc.column) + " – \"" + (chunk.original) + "\")") );
+		}
+
+		var newChunk = chunk.split( index );
+
+		this.byEnd[ index ] = chunk;
+		this.byStart[ index ] = newChunk;
+		this.byEnd[ newChunk.end ] = newChunk;
+
+		if ( chunk === this.lastChunk ) this.lastChunk = newChunk;
+
+		this.lastSearchedChunk = chunk;
+		return true;
+	},
+
+	toString: function toString () {
+		var str = this.intro;
+
+		var chunk = this.firstChunk;
+		while ( chunk ) {
+			str += chunk.toString();
+			chunk = chunk.next;
+		}
+
+		return str + this.outro;
+	},
+
+	trimLines: function trimLines () {
+		return this.trim('[\\r\\n]');
+	},
+
+	trim: function trim ( charType ) {
+		return this.trimStart( charType ).trimEnd( charType );
+	},
+
+	trimEnd: function trimEnd ( charType ) {
+		var this$1 = this;
+
+		var rx = new RegExp( ( charType || '\\s' ) + '+$' );
+
+		this.outro = this.outro.replace( rx, '' );
+		if ( this.outro.length ) return this;
+
+		var chunk = this.lastChunk;
+
+		do {
+			var end = chunk.end;
+			var aborted = chunk.trimEnd( rx );
+
+			// if chunk was trimmed, we have a new lastChunk
+			if ( chunk.end !== end ) {
+				this$1.lastChunk = chunk.next;
+
+				this$1.byEnd[ chunk.end ] = chunk;
+				this$1.byStart[ chunk.next.start ] = chunk.next;
+			}
+
+			if ( aborted ) return this$1;
+			chunk = chunk.previous;
+		} while ( chunk );
+
+		return this;
+	},
+
+	trimStart: function trimStart ( charType ) {
+		var this$1 = this;
+
+		var rx = new RegExp( '^' + ( charType || '\\s' ) + '+' );
+
+		this.intro = this.intro.replace( rx, '' );
+		if ( this.intro.length ) return this;
+
+		var chunk = this.firstChunk;
+
+		do {
+			var end = chunk.end;
+			var aborted = chunk.trimStart( rx );
+
+			if ( chunk.end !== end ) {
+				// special case...
+				if ( chunk === this$1.lastChunk ) this$1.lastChunk = chunk.next;
+
+				this$1.byEnd[ chunk.end ] = chunk;
+				this$1.byStart[ chunk.next.start ] = chunk.next;
+			}
+
+			if ( aborted ) return this$1;
+			chunk = chunk.next;
+		} while ( chunk );
+
+		return this;
+	}
+};
+
+var hasOwnProp = Object.prototype.hasOwnProperty;
+
+function Bundle$2 ( options ) {
+	if ( options === void 0 ) options = {};
+
+	this.intro = options.intro || '';
+	this.separator = options.separator !== undefined ? options.separator : '\n';
+
+	this.sources = [];
+
+	this.uniqueSources = [];
+	this.uniqueSourceIndexByFilename = {};
+}
+
+Bundle$2.prototype = {
+	addSource: function addSource ( source ) {
+		if ( source instanceof MagicString ) {
+			return this.addSource({
+				content: source,
+				filename: source.filename,
+				separator: this.separator
+			});
+		}
+
+		if ( !isObject( source ) || !source.content ) {
+			throw new Error( 'bundle.addSource() takes an object with a `content` property, which should be an instance of MagicString, and an optional `filename`' );
+		}
+
+		[ 'filename', 'indentExclusionRanges', 'separator' ].forEach( function (option) {
+			if ( !hasOwnProp.call( source, option ) ) source[ option ] = source.content[ option ];
+		});
+
+		if ( source.separator === undefined ) { // TODO there's a bunch of this sort of thing, needs cleaning up
+			source.separator = this.separator;
+		}
+
+		if ( source.filename ) {
+			if ( !hasOwnProp.call( this.uniqueSourceIndexByFilename, source.filename ) ) {
+				this.uniqueSourceIndexByFilename[ source.filename ] = this.uniqueSources.length;
+				this.uniqueSources.push({ filename: source.filename, content: source.content.original });
+			} else {
+				var uniqueSource = this.uniqueSources[ this.uniqueSourceIndexByFilename[ source.filename ] ];
+				if ( source.content.original !== uniqueSource.content ) {
+					throw new Error( ("Illegal source: same filename (" + (source.filename) + "), different contents") );
+				}
+			}
+		}
+
+		this.sources.push( source );
+		return this;
+	},
+
+	append: function append ( str, options ) {
+		this.addSource({
+			content: new MagicString( str ),
+			separator: ( options && options.separator ) || ''
+		});
+
+		return this;
+	},
+
+	clone: function clone () {
+		var bundle = new Bundle$2({
+			intro: this.intro,
+			separator: this.separator
+		});
+
+		this.sources.forEach( function (source) {
+			bundle.addSource({
+				filename: source.filename,
+				content: source.content.clone(),
+				separator: source.separator
+			});
+		});
+
+		return bundle;
+	},
+
+	generateMap: function generateMap ( options ) {
+		var this$1 = this;
+
+		var offsets = {};
+
+		var names = [];
+		this.sources.forEach( function (source) {
+			Object.keys( source.content.storedNames ).forEach( function (name) {
+				if ( !~names.indexOf( name ) ) names.push( name );
+			});
+		});
+
+		var encoded = (
+			getSemis( this.intro ) +
+			this.sources.map( function ( source, i ) {
+				var prefix = ( i > 0 ) ? ( getSemis( source.separator ) || ',' ) : '';
+				var mappings;
+
+				// we don't bother encoding sources without a filename
+				if ( !source.filename ) {
+					mappings = getSemis( source.content.toString() );
+				} else {
+					var sourceIndex = this$1.uniqueSourceIndexByFilename[ source.filename ];
+					mappings = source.content.getMappings( options.hires, sourceIndex, offsets, names );
+				}
+
+				return prefix + mappings;
+			}).join( '' )
+		);
+
+		return new SourceMap({
+			file: ( options.file ? options.file.split( /[\/\\]/ ).pop() : null ),
+			sources: this.uniqueSources.map( function (source) {
+				return options.file ? getRelativePath( options.file, source.filename ) : source.filename;
+			}),
+			sourcesContent: this.uniqueSources.map( function (source) {
+				return options.includeContent ? source.content : null;
+			}),
+			names: names,
+			mappings: encoded
+		});
+	},
+
+	getIndentString: function getIndentString () {
+		var indentStringCounts = {};
+
+		this.sources.forEach( function (source) {
+			var indentStr = source.content.indentStr;
+
+			if ( indentStr === null ) return;
+
+			if ( !indentStringCounts[ indentStr ] ) indentStringCounts[ indentStr ] = 0;
+			indentStringCounts[ indentStr ] += 1;
+		});
+
+		return ( Object.keys( indentStringCounts ).sort( function ( a, b ) {
+			return indentStringCounts[a] - indentStringCounts[b];
+		})[0] ) || '\t';
+	},
+
+	indent: function indent ( indentStr ) {
+		var this$1 = this;
+
+		if ( !arguments.length ) {
+			indentStr = this.getIndentString();
+		}
+
+		if ( indentStr === '' ) return this; // noop
+
+		var trailingNewline = !this.intro || this.intro.slice( -1 ) === '\n';
+
+		this.sources.forEach( function ( source, i ) {
+			var separator = source.separator !== undefined ? source.separator : this$1.separator;
+			var indentStart = trailingNewline || ( i > 0 && /\r?\n$/.test( separator ) );
+
+			source.content.indent( indentStr, {
+				exclude: source.indentExclusionRanges,
+				indentStart: indentStart//: trailingNewline || /\r?\n$/.test( separator )  //true///\r?\n/.test( separator )
+			});
+
+			// TODO this is a very slow way to determine this
+			trailingNewline = source.content.toString().slice( 0, -1 ) === '\n';
+		});
+
+		if ( this.intro ) {
+			this.intro = indentStr + this.intro.replace( /^[^\n]/gm, function ( match, index ) {
+				return index > 0 ? indentStr + match : match;
+			});
+		}
+
+		return this;
+	},
+
+	prepend: function prepend ( str ) {
+		this.intro = str + this.intro;
+		return this;
+	},
+
+	toString: function toString () {
+		var this$1 = this;
+
+		var body = this.sources.map( function ( source, i ) {
+			var separator = source.separator !== undefined ? source.separator : this$1.separator;
+			var str = ( i > 0 ? separator : '' ) + source.content.toString();
+
+			return str;
+		}).join( '' );
+
+		return this.intro + body;
+	},
+
+	trimLines: function trimLines () {
+		return this.trim('[\\r\\n]');
+	},
+
+	trim: function trim ( charType ) {
+		return this.trimStart( charType ).trimEnd( charType );
+	},
+
+	trimStart: function trimStart ( charType ) {
+		var this$1 = this;
+
+		var rx = new RegExp( '^' + ( charType || '\\s' ) + '+' );
+		this.intro = this.intro.replace( rx, '' );
+
+		if ( !this.intro ) {
+			var source;
+			var i = 0;
+
+			do {
+				source = this$1.sources[i];
+
+				if ( !source ) {
+					break;
+				}
+
+				source.content.trimStart( charType );
+				i += 1;
+			} while ( source.content.toString() === '' ); // TODO faster way to determine non-empty source?
+		}
+
+		return this;
+	},
+
+	trimEnd: function trimEnd ( charType ) {
+		var this$1 = this;
+
+		var rx = new RegExp( ( charType || '\\s' ) + '+$' );
+
+		var source;
+		var i = this.sources.length - 1;
+
+		do {
+			source = this$1.sources[i];
+
+			if ( !source ) {
+				this$1.intro = this$1.intro.replace( rx, '' );
+				break;
+			}
+
+			source.content.trimEnd( charType );
+			i -= 1;
+		} while ( source.content.toString() === '' ); // TODO faster way to determine non-empty source?
+
+		return this;
+	}
+};
+
+function getSemis ( str ) {
+	return new Array( str.split( '\n' ).length ).join( ';' );
+}
+
+// Return the first non-falsy result from an array of
+// maybe-sync, maybe-promise-returning functions
+function first ( candidates ) {
+	return function () {
+		var args = [], len = arguments.length;
+		while ( len-- ) args[ len ] = arguments[ len ];
+
+		return candidates.reduce( function ( promise, candidate ) {
+			return promise.then( function (result) { return result != null ?
+				result :
+				Promise.resolve( candidate.apply( void 0, args ) ); } );
+		}, Promise.resolve() );
+	};
+}
+
+function find ( array, fn ) {
+	for ( var i = 0; i < array.length; i += 1 ) {
+		if ( fn( array[i], i ) ) return array[i];
+	}
+
+	return null;
+}
+
+// Reserved word lists for various dialects of the language
+
+var reservedWords = {
+  3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
+  5: "class enum extends super const export import",
+  6: "enum",
+  strict: "implements interface let package private protected public static yield",
+  strictBind: "eval arguments"
+};
+
+// And the keywords
+
+var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
+
+var keywords = {
+  5: ecma5AndLessKeywords,
+  6: ecma5AndLessKeywords + " const class extends export import super"
+};
+
+// ## Character categories
+
+// Big ugly regular expressions that match characters in the
+// whitespace, identifier, and identifier-start categories. These
+// are only applied when a character is found to actually have a
+// code point above 128.
+// Generated by `bin/generate-identifier-regex.js`.
+
+var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
+var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
+
+var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
+
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
+
+// These are a run-length and offset encoded representation of the
+// >0xffff code points that are a valid part of identifiers. The
+// offset starts at 0x10000, and each pair of numbers represents an
+// offset to the next range, and then a size of the range. They were
+// generated by bin/generate-identifier-regex.js
+var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541];
+var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
+
+// This has a complexity linear to the value of the code. The
+// assumption is that looking up astral identifier characters is
+// rare.
+function isInAstralSet(code, set) {
+  var pos = 0x10000;
+  for (var i = 0; i < set.length; i += 2) {
+    pos += set[i];
+    if (pos > code) return false
+    pos += set[i + 1];
+    if (pos >= code) return true
+  }
+}
+
+// Test whether a given character code starts an identifier.
+
+function isIdentifierStart(code, astral) {
+  if (code < 65) return code === 36
+  if (code < 91) return true
+  if (code < 97) return code === 95
+  if (code < 123) return true
+  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
+  if (astral === false) return false
+  return isInAstralSet(code, astralIdentifierStartCodes)
+}
+
+// Test whether a given character is part of an identifier.
+
+function isIdentifierChar(code, astral) {
+  if (code < 48) return code === 36
+  if (code < 58) return true
+  if (code < 65) return false
+  if (code < 91) return true
+  if (code < 97) return code === 95
+  if (code < 123) return true
+  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
+  if (astral === false) return false
+  return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
+}
+
+// ## Token types
+
+// The assignment of fine-grained, information-carrying type objects
+// allows the tokenizer to store the information it has about a
+// token in a way that is very cheap for the parser to look up.
+
+// All token type variables start with an underscore, to make them
+// easy to recognize.
+
+// The `beforeExpr` property is used to disambiguate between regular
+// expressions and divisions. It is set on all token types that can
+// be followed by an expression (thus, a slash after them would be a
+// regular expression).
+//
+// The `startsExpr` property is used to check if the token ends a
+// `yield` expression. It is set on all token types that either can
+// directly start an expression (like a quotation mark) or can
+// continue an expression (like the body of a string).
+//
+// `isLoop` marks a keyword as starting a loop, which is important
+// to know when parsing a label, in order to allow or disallow
+// continue jumps to that label.
+
+var TokenType = function TokenType(label, conf) {
+  if ( conf === void 0 ) conf = {};
+
+  this.label = label;
+  this.keyword = conf.keyword;
+  this.beforeExpr = !!conf.beforeExpr;
+  this.startsExpr = !!conf.startsExpr;
+  this.isLoop = !!conf.isLoop;
+  this.isAssign = !!conf.isAssign;
+  this.prefix = !!conf.prefix;
+  this.postfix = !!conf.postfix;
+  this.binop = conf.binop || null;
+  this.updateContext = null;
+};
+
+function binop(name, prec) {
+  return new TokenType(name, {beforeExpr: true, binop: prec})
+}
+var beforeExpr = {beforeExpr: true};
+var startsExpr = {startsExpr: true};
+
+// Map keyword names to token types.
+
+var keywords$1 = {};
+
+// Succinct definitions of keyword token types
+function kw(name, options) {
+  if ( options === void 0 ) options = {};
+
+  options.keyword = name;
+  return keywords$1[name] = new TokenType(name, options)
+}
+
+var types = {
+  num: new TokenType("num", startsExpr),
+  regexp: new TokenType("regexp", startsExpr),
+  string: new TokenType("string", startsExpr),
+  name: new TokenType("name", startsExpr),
+  eof: new TokenType("eof"),
+
+  // Punctuation token types.
+  bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
+  bracketR: new TokenType("]"),
+  braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
+  braceR: new TokenType("}"),
+  parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
+  parenR: new TokenType(")"),
+  comma: new TokenType(",", beforeExpr),
+  semi: new TokenType(";", beforeExpr),
+  colon: new TokenType(":", beforeExpr),
+  dot: new TokenType("."),
+  question: new TokenType("?", beforeExpr),
+  arrow: new TokenType("=>", beforeExpr),
+  template: new TokenType("template"),
+  ellipsis: new TokenType("...", beforeExpr),
+  backQuote: new TokenType("`", startsExpr),
+  dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
+
+  // Operators. These carry several kinds of properties to help the
+  // parser use them properly (the presence of these properties is
+  // what categorizes them as operators).
+  //
+  // `binop`, when present, specifies that this operator is a binary
+  // operator, and will refer to its precedence.
+  //
+  // `prefix` and `postfix` mark the operator as a prefix or postfix
+  // unary operator.
+  //
+  // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
+  // binary operators with a very low precedence, that should result
+  // in AssignmentExpression nodes.
+
+  eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
+  assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
+  incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
+  prefix: new TokenType("prefix", {beforeExpr: true, prefix: true, startsExpr: true}),
+  logicalOR: binop("||", 1),
+  logicalAND: binop("&&", 2),
+  bitwiseOR: binop("|", 3),
+  bitwiseXOR: binop("^", 4),
+  bitwiseAND: binop("&", 5),
+  equality: binop("==/!=", 6),
+  relational: binop("</>", 7),
+  bitShift: binop("<</>>", 8),
+  plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
+  modulo: binop("%", 10),
+  star: binop("*", 10),
+  slash: binop("/", 10),
+  starstar: new TokenType("**", {beforeExpr: true}),
+
+  // Keyword token types.
+  _break: kw("break"),
+  _case: kw("case", beforeExpr),
+  _catch: kw("catch"),
+  _continue: kw("continue"),
+  _debugger: kw("debugger"),
+  _default: kw("default", beforeExpr),
+  _do: kw("do", {isLoop: true, beforeExpr: true}),
+  _else: kw("else", beforeExpr),
+  _finally: kw("finally"),
+  _for: kw("for", {isLoop: true}),
+  _function: kw("function", startsExpr),
+  _if: kw("if"),
+  _return: kw("return", beforeExpr),
+  _switch: kw("switch"),
+  _throw: kw("throw", beforeExpr),
+  _try: kw("try"),
+  _var: kw("var"),
+  _const: kw("const"),
+  _while: kw("while", {isLoop: true}),
+  _with: kw("with"),
+  _new: kw("new", {beforeExpr: true, startsExpr: true}),
+  _this: kw("this", startsExpr),
+  _super: kw("super", startsExpr),
+  _class: kw("class"),
+  _extends: kw("extends", beforeExpr),
+  _export: kw("export"),
+  _import: kw("import"),
+  _null: kw("null", startsExpr),
+  _true: kw("true", startsExpr),
+  _false: kw("false", startsExpr),
+  _in: kw("in", {beforeExpr: true, binop: 7}),
+  _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
+  _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
+  _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
+  _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
+};
+
+// Matches a whole line break (where CRLF is considered a single
+// line break). Used to count lines.
+
+var lineBreak = /\r\n?|\n|\u2028|\u2029/;
+var lineBreakG = new RegExp(lineBreak.source, "g");
+
+function isNewLine(code) {
+  return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
+}
+
+var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
+
+var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
+
+function isArray(obj) {
+  return Object.prototype.toString.call(obj) === "[object Array]"
+}
+
+// Checks if an object has a property.
+
+function has(obj, propName) {
+  return Object.prototype.hasOwnProperty.call(obj, propName)
+}
+
+// These are used when `options.locations` is on, for the
+// `startLoc` and `endLoc` properties.
+
+var Position = function Position(line, col) {
+  this.line = line;
+  this.column = col;
+};
+
+Position.prototype.offset = function offset (n) {
+  return new Position(this.line, this.column + n)
+};
+
+var SourceLocation = function SourceLocation(p, start, end) {
+  this.start = start;
+  this.end = end;
+  if (p.sourceFile !== null) this.source = p.sourceFile;
+};
+
+// The `getLineInfo` function is mostly useful when the
+// `locations` option is off (for performance reasons) and you
+// want to find the line/column position for a given character
+// offset. `input` should be the code string that the offset refers
+// into.
+
+function getLineInfo(input, offset) {
+  for (var line = 1, cur = 0;;) {
+    lineBreakG.lastIndex = cur;
+    var match = lineBreakG.exec(input);
+    if (match && match.index < offset) {
+      ++line;
+      cur = match.index + match[0].length;
+    } else {
+      return new Position(line, offset - cur)
+    }
+  }
+}
+
+// A second optional argument can be given to further configure
+// the parser process. These options are recognized:
+
+var defaultOptions = {
+  // `ecmaVersion` indicates the ECMAScript version to parse. Must
+  // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support
+  // for strict mode, the set of reserved words, and support for
+  // new syntax features. The default is 7.
+  ecmaVersion: 7,
+  // `sourceType` indicates the mode the code should be parsed in.
+  // Can be either `"script"` or `"module"`. This influences global
+  // strict mode and parsing of `import` and `export` declarations.
+  sourceType: "script",
+  // `onInsertedSemicolon` can be a callback that will be called
+  // when a semicolon is automatically inserted. It will be passed
+  // th position of the comma as an offset, and if `locations` is
+  // enabled, it is given the location as a `{line, column}` object
+  // as second argument.
+  onInsertedSemicolon: null,
+  // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
+  // trailing commas.
+  onTrailingComma: null,
+  // By default, reserved words are only enforced if ecmaVersion >= 5.
+  // Set `allowReserved` to a boolean value to explicitly turn this on
+  // an off. When this option has the value "never", reserved words
+  // and keywords can also not be used as property names.
+  allowReserved: null,
+  // When enabled, a return at the top level is not considered an
+  // error.
+  allowReturnOutsideFunction: false,
+  // When enabled, import/export statements are not constrained to
+  // appearing at the top of the program.
+  allowImportExportEverywhere: false,
+  // When enabled, hashbang directive in the beginning of file
+  // is allowed and treated as a line comment.
+  allowHashBang: false,
+  // When `locations` is on, `loc` properties holding objects with
+  // `start` and `end` properties in `{line, column}` form (with
+  // line being 1-based and column 0-based) will be attached to the
+  // nodes.
+  locations: false,
+  // A function can be passed as `onToken` option, which will
+  // cause Acorn to call that function with object in the same
+  // format as tokens returned from `tokenizer().getToken()`. Note
+  // that you are not allowed to call the parser from the
+  // callback—that will corrupt its internal state.
+  onToken: null,
+  // A function can be passed as `onComment` option, which will
+  // cause Acorn to call that function with `(block, text, start,
+  // end)` parameters whenever a comment is skipped. `block` is a
+  // boolean indicating whether this is a block (`/* */`) comment,
+  // `text` is the content of the comment, and `start` and `end` are
+  // character offsets that denote the start and end of the comment.
+  // When the `locations` option is on, two more parameters are
+  // passed, the full `{line, column}` locations of the start and
+  // end of the comments. Note that you are not allowed to call the
+  // parser from the callback—that will corrupt its internal state.
+  onComment: null,
+  // Nodes have their start and end characters offsets recorded in
+  // `start` and `end` properties (directly on the node, rather than
+  // the `loc` object, which holds line/column data. To also add a
+  // [semi-standardized][range] `range` property holding a `[start,
+  // end]` array with the same numbers, set the `ranges` option to
+  // `true`.
+  //
+  // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
+  ranges: false,
+  // It is possible to parse multiple files into a single AST by
+  // passing the tree produced by parsing the first file as
+  // `program` option in subsequent parses. This will add the
+  // toplevel forms of the parsed file to the `Program` (top) node
+  // of an existing parse tree.
+  program: null,
+  // When `locations` is on, you can pass this to record the source
+  // file in every node's `loc` object.
+  sourceFile: null,
+  // This value, if given, is stored in every node, whether
+  // `locations` is on or off.
+  directSourceFile: null,
+  // When enabled, parenthesized expressions are represented by
+  // (non-standard) ParenthesizedExpression nodes
+  preserveParens: false,
+  plugins: {}
+};
+
+// Interpret and default an options object
+
+function getOptions(opts) {
+  var options = {};
+
+  for (var opt in defaultOptions)
+    options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt];
+
+  if (options.ecmaVersion >= 2015)
+    options.ecmaVersion -= 2009;
+
+  if (options.allowReserved == null)
+    options.allowReserved = options.ecmaVersion < 5;
+
+  if (isArray(options.onToken)) {
+    var tokens = options.onToken;
+    options.onToken = function (token) { return tokens.push(token); };
+  }
+  if (isArray(options.onComment))
+    options.onComment = pushComment(options, options.onComment);
+
+  return options
+}
+
+function pushComment(options, array) {
+  return function (block, text, start, end, startLoc, endLoc) {
+    var comment = {
+      type: block ? 'Block' : 'Line',
+      value: text,
+      start: start,
+      end: end
+    };
+    if (options.locations)
+      comment.loc = new SourceLocation(this, startLoc, endLoc);
+    if (options.ranges)
+      comment.range = [start, end];
+    array.push(comment);
+  }
+}
+
+// Registered plugins
+var plugins = {};
+
+function keywordRegexp(words) {
+  return new RegExp("^(" + words.replace(/ /g, "|") + ")$")
+}
+
+var Parser = function Parser(options, input, startPos) {
+  this.options = options = getOptions(options);
+  this.sourceFile = options.sourceFile;
+  this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
+  var reserved = "";
+  if (!options.allowReserved) {
+    for (var v = options.ecmaVersion;; v--)
+      if (reserved = reservedWords[v]) break
+    if (options.sourceType == "module") reserved += " await";
+  }
+  this.reservedWords = keywordRegexp(reserved);
+  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
+  this.reservedWordsStrict = keywordRegexp(reservedStrict);
+  this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
+  this.input = String(input);
+
+  // Used to signal to callers of `readWord1` whether the word
+  // contained any escape sequences. This is needed because words with
+  // escape sequences must not be interpreted as keywords.
+  this.containsEsc = false;
+
+  // Load plugins
+  this.loadPlugins(options.plugins);
+
+  // Set up token state
+
+  // The current position of the tokenizer in the input.
+  if (startPos) {
+    this.pos = startPos;
+    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
+    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+  } else {
+    this.pos = this.lineStart = 0;
+    this.curLine = 1;
+  }
+
+  // Properties of the current token:
+  // Its type
+  this.type = types.eof;
+  // For tokens that include more information than their type, the value
+  this.value = null;
+  // Its start and end offset
+  this.start = this.end = this.pos;
+  // And, if locations are used, the {line, column} object
+  // corresponding to those offsets
+  this.startLoc = this.endLoc = this.curPosition();
+
+  // Position information for the previous token
+  this.lastTokEndLoc = this.lastTokStartLoc = null;
+  this.lastTokStart = this.lastTokEnd = this.pos;
+
+  // The context stack is used to superficially track syntactic
+  // context to predict whether a regular expression is allowed in a
+  // given position.
+  this.context = this.initialContext();
+  this.exprAllowed = true;
+
+  // Figure out if it's a module code.
+  this.strict = this.inModule = options.sourceType === "module";
+
+  // Used to signify the start of a potential arrow function
+  this.potentialArrowAt = -1;
+
+  // Flags to track whether we are in a function, a generator, an async function.
+  this.inFunction = this.inGenerator = this.inAsync = false;
+  // Positions to delayed-check that yield/await does not exist in default parameters.
+  this.yieldPos = this.awaitPos = 0;
+  // Labels in scope.
+  this.labels = [];
+
+  // If enabled, skip leading hashbang line.
+  if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === '#!')
+    this.skipLineComment(2);
+};
+
+// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
+Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) };
+Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
+
+Parser.prototype.extend = function extend (name, f) {
+  this[name] = f(this[name]);
+};
+
+Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
+    var this$1 = this;
+
+  for (var name in pluginConfigs) {
+    var plugin = plugins[name];
+    if (!plugin) throw new Error("Plugin '" + name + "' not found")
+    plugin(this$1, pluginConfigs[name]);
+  }
+};
+
+Parser.prototype.parse = function parse () {
+  var node = this.options.program || this.startNode();
+  this.nextToken();
+  return this.parseTopLevel(node)
+};
+
+var pp = Parser.prototype;
+
+// ## Parser utilities
+
+// Test whether a statement node is the string literal `"use strict"`.
+
+pp.isUseStrict = function(stmt) {
+  return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" &&
+    stmt.expression.type === "Literal" &&
+    stmt.expression.raw.slice(1, -1) === "use strict"
+};
+
+// Predicate that tests whether the next token is of the given
+// type, and if yes, consumes it as a side effect.
+
+pp.eat = function(type) {
+  if (this.type === type) {
+    this.next();
+    return true
+  } else {
+    return false
+  }
+};
+
+// Tests whether parsed token is a contextual keyword.
+
+pp.isContextual = function(name) {
+  return this.type === types.name && this.value === name
+};
+
+// Consumes contextual keyword if possible.
+
+pp.eatContextual = function(name) {
+  return this.value === name && this.eat(types.name)
+};
+
+// Asserts that following token is given contextual keyword.
+
+pp.expectContextual = function(name) {
+  if (!this.eatContextual(name)) this.unexpected();
+};
+
+// Test whether a semicolon can be inserted at the current position.
+
+pp.canInsertSemicolon = function() {
+  return this.type === types.eof ||
+    this.type === types.braceR ||
+    lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+};
+
+pp.insertSemicolon = function() {
+  if (this.canInsertSemicolon()) {
+    if (this.options.onInsertedSemicolon)
+      this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc);
+    return true
+  }
+};
+
+// Consume a semicolon, or, failing that, see if we are allowed to
+// pretend that there is a semicolon at this position.
+
+pp.semicolon = function() {
+  if (!this.eat(types.semi) && !this.insertSemicolon()) this.unexpected();
+};
+
+pp.afterTrailingComma = function(tokType, notNext) {
+  if (this.type == tokType) {
+    if (this.options.onTrailingComma)
+      this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc);
+    if (!notNext)
+      this.next();
+    return true
+  }
+};
+
+// Expect a token of a given type. If found, consume it, otherwise,
+// raise an unexpected token error.
+
+pp.expect = function(type) {
+  this.eat(type) || this.unexpected();
+};
+
+// Raise an unexpected token error.
+
+pp.unexpected = function(pos) {
+  this.raise(pos != null ? pos : this.start, "Unexpected token");
+};
+
+var DestructuringErrors = function DestructuringErrors() {
+  this.shorthandAssign = 0;
+  this.trailingComma = 0;
+};
+
+pp.checkPatternErrors = function(refDestructuringErrors, andThrow) {
+  var trailing = refDestructuringErrors && refDestructuringErrors.trailingComma;
+  if (!andThrow) return !!trailing
+  if (trailing) this.raise(trailing, "Comma is not permitted after the rest element");
+};
+
+pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
+  var pos = refDestructuringErrors && refDestructuringErrors.shorthandAssign;
+  if (!andThrow) return !!pos
+  if (pos) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns");
+};
+
+pp.checkYieldAwaitInDefaultParams = function() {
+  if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
+    this.raise(this.yieldPos, "Yield expression cannot be a default value");
+  if (this.awaitPos)
+    this.raise(this.awaitPos, "Await expression cannot be a default value");
+};
+
+var pp$1 = Parser.prototype;
+
+// ### Statement parsing
+
+// Parse a program. Initializes the parser, reads any number of
+// statements, and wraps them in a Program node.  Optionally takes a
+// `program` argument.  If present, the statements will be appended
+// to its body instead of creating a new node.
+
+pp$1.parseTopLevel = function(node) {
+  var this$1 = this;
+
+  var first = true, exports = {};
+  if (!node.body) node.body = [];
+  while (this.type !== types.eof) {
+    var stmt = this$1.parseStatement(true, true, exports);
+    node.body.push(stmt);
+    if (first) {
+      if (this$1.isUseStrict(stmt)) this$1.setStrict(true);
+      first = false;
+    }
+  }
+  this.next();
+  if (this.options.ecmaVersion >= 6) {
+    node.sourceType = this.options.sourceType;
+  }
+  return this.finishNode(node, "Program")
+};
+
+var loopLabel = {kind: "loop"};
+var switchLabel = {kind: "switch"};
+
+pp$1.isLet = function() {
+  if (this.type !== types.name || this.options.ecmaVersion < 6 || this.value != "let") return false
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+  if (nextCh === 91 || nextCh == 123) return true // '{' and '['
+  if (isIdentifierStart(nextCh, true)) {
+    for (var pos = next + 1; isIdentifierChar(this.input.charCodeAt(pos), true); ++pos) {}
+    var ident = this.input.slice(next, pos);
+    if (!this.isKeyword(ident)) return true
+  }
+  return false
+};
+
+// check 'async [no LineTerminator here] function'
+// - 'async /*foo*/ function' is OK.
+// - 'async /*\n*/ function' is invalid.
+pp$1.isAsyncFunction = function() {
+  if (this.type !== types.name || this.options.ecmaVersion < 8 || this.value != "async")
+    return false
+
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length;
+  return !lineBreak.test(this.input.slice(this.pos, next)) &&
+    this.input.slice(next, next + 8) === "function" &&
+    (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
+};
+
+// Parse a single statement.
+//
+// If expecting a statement and finding a slash operator, parse a
+// regular expression literal. This is to handle cases like
+// `if (foo) /blah/.exec(foo)`, where looking at the previous token
+// does not help.
+
+pp$1.parseStatement = function(declaration, topLevel, exports) {
+  var starttype = this.type, node = this.startNode(), kind;
+
+  if (this.isLet()) {
+    starttype = types._var;
+    kind = "let";
+  }
+
+  // Most types of statements are recognized by the keyword they
+  // start with. Many are trivial to parse, some require a bit of
+  // complexity.
+
+  switch (starttype) {
+  case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
+  case types._debugger: return this.parseDebuggerStatement(node)
+  case types._do: return this.parseDoStatement(node)
+  case types._for: return this.parseForStatement(node)
+  case types._function:
+    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected();
+    return this.parseFunctionStatement(node, false)
+  case types._class:
+    if (!declaration) this.unexpected();
+    return this.parseClass(node, true)
+  case types._if: return this.parseIfStatement(node)
+  case types._return: return this.parseReturnStatement(node)
+  case types._switch: return this.parseSwitchStatement(node)
+  case types._throw: return this.parseThrowStatement(node)
+  case types._try: return this.parseTryStatement(node)
+  case types._const: case types._var:
+    kind = kind || this.value;
+    if (!declaration && kind != "var") this.unexpected();
+    return this.parseVarStatement(node, kind)
+  case types._while: return this.parseWhileStatement(node)
+  case types._with: return this.parseWithStatement(node)
+  case types.braceL: return this.parseBlock()
+  case types.semi: return this.parseEmptyStatement(node)
+  case types._export:
+  case types._import:
+    if (!this.options.allowImportExportEverywhere) {
+      if (!topLevel)
+        this.raise(this.start, "'import' and 'export' may only appear at the top level");
+      if (!this.inModule)
+        this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'");
+    }
+    return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
+
+    // If the statement does not start with a statement keyword or a
+    // brace, it's an ExpressionStatement or LabeledStatement. We
+    // simply start parsing an expression, and afterwards, if the
+    // next token is a colon and the expression was a simple
+    // Identifier node, we switch to interpreting it as a label.
+  default:
+    if (this.isAsyncFunction() && declaration) {
+      this.next();
+      return this.parseFunctionStatement(node, true)
+    }
+
+    var maybeName = this.value, expr = this.parseExpression();
+    if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
+      return this.parseLabeledStatement(node, maybeName, expr)
+    else return this.parseExpressionStatement(node, expr)
+  }
+};
+
+pp$1.parseBreakContinueStatement = function(node, keyword) {
+  var this$1 = this;
+
+  var isBreak = keyword == "break";
+  this.next();
+  if (this.eat(types.semi) || this.insertSemicolon()) node.label = null;
+  else if (this.type !== types.name) this.unexpected();
+  else {
+    node.label = this.parseIdent();
+    this.semicolon();
+  }
+
+  // Verify that there is an actual destination to break or
+  // continue to.
+  for (var i = 0; i < this.labels.length; ++i) {
+    var lab = this$1.labels[i];
+    if (node.label == null || lab.name === node.label.name) {
+      if (lab.kind != null && (isBreak || lab.kind === "loop")) break
+      if (node.label && isBreak) break
+    }
+  }
+  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword);
+  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
+};
+
+pp$1.parseDebuggerStatement = function(node) {
+  this.next();
+  this.semicolon();
+  return this.finishNode(node, "DebuggerStatement")
+};
+
+pp$1.parseDoStatement = function(node) {
+  this.next();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  this.expect(types._while);
+  node.test = this.parseParenExpression();
+  if (this.options.ecmaVersion >= 6)
+    this.eat(types.semi);
+  else
+    this.semicolon();
+  return this.finishNode(node, "DoWhileStatement")
+};
+
+// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
+// loop is non-trivial. Basically, we have to parse the init `var`
+// statement or expression, disallowing the `in` operator (see
+// the second parameter to `parseExpression`), and then check
+// whether the next token is `in` or `of`. When there is no init
+// part (semicolon immediately after the opening parenthesis), it
+// is a regular `for` loop.
+
+pp$1.parseForStatement = function(node) {
+  this.next();
+  this.labels.push(loopLabel);
+  this.expect(types.parenL);
+  if (this.type === types.semi) return this.parseFor(node, null)
+  var isLet = this.isLet();
+  if (this.type === types._var || this.type === types._const || isLet) {
+    var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+    this.next();
+    this.parseVar(init$1, true, kind);
+    this.finishNode(init$1, "VariableDeclaration");
+    if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
+        !(kind !== "var" && init$1.declarations[0].init))
+      return this.parseForIn(node, init$1)
+    return this.parseFor(node, init$1)
+  }
+  var refDestructuringErrors = new DestructuringErrors;
+  var init = this.parseExpression(true, refDestructuringErrors);
+  if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
+    this.checkPatternErrors(refDestructuringErrors, true);
+    this.toAssignable(init);
+    this.checkLVal(init);
+    return this.parseForIn(node, init)
+  } else {
+    this.checkExpressionErrors(refDestructuringErrors, true);
+  }
+  return this.parseFor(node, init)
+};
+
+pp$1.parseFunctionStatement = function(node, isAsync) {
+  this.next();
+  return this.parseFunction(node, true, false, isAsync)
+};
+
+pp$1.isFunction = function() {
+  return this.type === types._function || this.isAsyncFunction()
+};
+
+pp$1.parseIfStatement = function(node) {
+  this.next();
+  node.test = this.parseParenExpression();
+  // allow function declarations in branches, but only in non-strict mode
+  node.consequent = this.parseStatement(!this.strict && this.isFunction());
+  node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.isFunction()) : null;
+  return this.finishNode(node, "IfStatement")
+};
+
+pp$1.parseReturnStatement = function(node) {
+  if (!this.inFunction && !this.options.allowReturnOutsideFunction)
+    this.raise(this.start, "'return' outside of function");
+  this.next();
+
+  // In `return` (and `break`/`continue`), the keywords with
+  // optional arguments, we eagerly look for a semicolon or the
+  // possibility to insert one.
+
+  if (this.eat(types.semi) || this.insertSemicolon()) node.argument = null;
+  else { node.argument = this.parseExpression(); this.semicolon(); }
+  return this.finishNode(node, "ReturnStatement")
+};
+
+pp$1.parseSwitchStatement = function(node) {
+  var this$1 = this;
+
+  this.next();
+  node.discriminant = this.parseParenExpression();
+  node.cases = [];
+  this.expect(types.braceL);
+  this.labels.push(switchLabel);
+
+  // Statements under must be grouped (by label) in SwitchCase
+  // nodes. `cur` is used to keep the node that we are currently
+  // adding statements to.
+
+  for (var cur, sawDefault = false; this.type != types.braceR;) {
+    if (this$1.type === types._case || this$1.type === types._default) {
+      var isCase = this$1.type === types._case;
+      if (cur) this$1.finishNode(cur, "SwitchCase");
+      node.cases.push(cur = this$1.startNode());
+      cur.consequent = [];
+      this$1.next();
+      if (isCase) {
+        cur.test = this$1.parseExpression();
+      } else {
+        if (sawDefault) this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses");
+        sawDefault = true;
+        cur.test = null;
+      }
+      this$1.expect(types.colon);
+    } else {
+      if (!cur) this$1.unexpected();
+      cur.consequent.push(this$1.parseStatement(true));
+    }
+  }
+  if (cur) this.finishNode(cur, "SwitchCase");
+  this.next(); // Closing brace
+  this.labels.pop();
+  return this.finishNode(node, "SwitchStatement")
+};
+
+pp$1.parseThrowStatement = function(node) {
+  this.next();
+  if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
+    this.raise(this.lastTokEnd, "Illegal newline after throw");
+  node.argument = this.parseExpression();
+  this.semicolon();
+  return this.finishNode(node, "ThrowStatement")
+};
+
+// Reused empty array added for node fields that are always empty.
+
+var empty = [];
+
+pp$1.parseTryStatement = function(node) {
+  this.next();
+  node.block = this.parseBlock();
+  node.handler = null;
+  if (this.type === types._catch) {
+    var clause = this.startNode();
+    this.next();
+    this.expect(types.parenL);
+    clause.param = this.parseBindingAtom();
+    this.checkLVal(clause.param, true);
+    this.expect(types.parenR);
+    clause.body = this.parseBlock();
+    node.handler = this.finishNode(clause, "CatchClause");
+  }
+  node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
+  if (!node.handler && !node.finalizer)
+    this.raise(node.start, "Missing catch or finally clause");
+  return this.finishNode(node, "TryStatement")
+};
+
+pp$1.parseVarStatement = function(node, kind) {
+  this.next();
+  this.parseVar(node, false, kind);
+  this.semicolon();
+  return this.finishNode(node, "VariableDeclaration")
+};
+
+pp$1.parseWhileStatement = function(node) {
+  this.next();
+  node.test = this.parseParenExpression();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, "WhileStatement")
+};
+
+pp$1.parseWithStatement = function(node) {
+  if (this.strict) this.raise(this.start, "'with' in strict mode");
+  this.next();
+  node.object = this.parseParenExpression();
+  node.body = this.parseStatement(false);
+  return this.finishNode(node, "WithStatement")
+};
+
+pp$1.parseEmptyStatement = function(node) {
+  this.next();
+  return this.finishNode(node, "EmptyStatement")
+};
+
+pp$1.parseLabeledStatement = function(node, maybeName, expr) {
+  var this$1 = this;
+
+  for (var i = 0; i < this.labels.length; ++i)
+    if (this$1.labels[i].name === maybeName) this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
+  var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
+  for (var i$1 = this.labels.length - 1; i$1 >= 0; i$1--) {
+    var label = this$1.labels[i$1];
+    if (label.statementStart == node.start) {
+      label.statementStart = this$1.start;
+      label.kind = kind;
+    } else break
+  }
+  this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
+  node.body = this.parseStatement(true);
+  this.labels.pop();
+  node.label = expr;
+  return this.finishNode(node, "LabeledStatement")
+};
+
+pp$1.parseExpressionStatement = function(node, expr) {
+  node.expression = expr;
+  this.semicolon();
+  return this.finishNode(node, "ExpressionStatement")
+};
+
+// Parse a semicolon-enclosed block of statements, handling `"use
+// strict"` declarations when `allowStrict` is true (used for
+// function bodies).
+
+pp$1.parseBlock = function(allowStrict) {
+  var this$1 = this;
+
+  var node = this.startNode(), first = true, oldStrict;
+  node.body = [];
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    var stmt = this$1.parseStatement(true);
+    node.body.push(stmt);
+    if (first && allowStrict && this$1.isUseStrict(stmt)) {
+      oldStrict = this$1.strict;
+      this$1.setStrict(this$1.strict = true);
+    }
+    first = false;
+  }
+  if (oldStrict === false) this.setStrict(false);
+  return this.finishNode(node, "BlockStatement")
+};
+
+// Parse a regular `for` loop. The disambiguation code in
+// `parseStatement` will already have parsed the init statement or
+// expression.
+
+pp$1.parseFor = function(node, init) {
+  node.init = init;
+  this.expect(types.semi);
+  node.test = this.type === types.semi ? null : this.parseExpression();
+  this.expect(types.semi);
+  node.update = this.type === types.parenR ? null : this.parseExpression();
+  this.expect(types.parenR);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, "ForStatement")
+};
+
+// Parse a `for`/`in` and `for`/`of` loop, which are almost
+// same from parser's perspective.
+
+pp$1.parseForIn = function(node, init) {
+  var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.expect(types.parenR);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  return this.finishNode(node, type)
+};
+
+// Parse a list of variable declarations.
+
+pp$1.parseVar = function(node, isFor, kind) {
+  var this$1 = this;
+
+  node.declarations = [];
+  node.kind = kind;
+  for (;;) {
+    var decl = this$1.startNode();
+    this$1.parseVarId(decl);
+    if (this$1.eat(types.eq)) {
+      decl.init = this$1.parseMaybeAssign(isFor);
+    } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
+      this$1.unexpected();
+    } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
+      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
+    } else {
+      decl.init = null;
+    }
+    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
+    if (!this$1.eat(types.comma)) break
+  }
+  return node
+};
+
+pp$1.parseVarId = function(decl) {
+  decl.id = this.parseBindingAtom();
+  this.checkLVal(decl.id, true);
+};
+
+// Parse a function declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
+  this.initFunction(node);
+  if (this.options.ecmaVersion >= 6 && !isAsync)
+    node.generator = this.eat(types.star);
+  if (this.options.ecmaVersion >= 8)
+    node.async = !!isAsync;
+
+  if (isStatement)
+    node.id = this.parseIdent();
+
+  var oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+
+  if (!isStatement && this.type === types.name)
+    node.id = this.parseIdent();
+  this.parseFunctionParams(node);
+  this.parseFunctionBody(node, allowExpressionBody);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
+};
+
+pp$1.parseFunctionParams = function(node) {
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8, true);
+  this.checkYieldAwaitInDefaultParams();
+};
+
+// Parse a class declaration or literal (depending on the
+// `isStatement` parameter).
+
+pp$1.parseClass = function(node, isStatement) {
+  var this$1 = this;
+
+  this.next();
+  this.parseClassId(node, isStatement);
+  this.parseClassSuper(node);
+  var classBody = this.startNode();
+  var hadConstructor = false;
+  classBody.body = [];
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    if (this$1.eat(types.semi)) continue
+    var method = this$1.startNode();
+    var isGenerator = this$1.eat(types.star);
+    var isAsync = false;
+    var isMaybeStatic = this$1.type === types.name && this$1.value === "static";
+    this$1.parsePropertyName(method);
+    method.static = isMaybeStatic && this$1.type !== types.parenL;
+    if (method.static) {
+      if (isGenerator) this$1.unexpected();
+      isGenerator = this$1.eat(types.star);
+      this$1.parsePropertyName(method);
+    }
+    if (this$1.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
+        method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== types.parenL &&
+        !this$1.canInsertSemicolon()) {
+      isAsync = true;
+      this$1.parsePropertyName(method);
+    }
+    method.kind = "method";
+    var isGetSet = false;
+    if (!method.computed) {
+      var key = method.key;
+      if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== types.parenL && (key.name === "get" || key.name === "set")) {
+        isGetSet = true;
+        method.kind = key.name;
+        key = this$1.parsePropertyName(method);
+      }
+      if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
+          key.type === "Literal" && key.value === "constructor")) {
+        if (hadConstructor) this$1.raise(key.start, "Duplicate constructor in the same class");
+        if (isGetSet) this$1.raise(key.start, "Constructor can't have get/set modifier");
+        if (isGenerator) this$1.raise(key.start, "Constructor can't be a generator");
+        if (isAsync) this$1.raise(key.start, "Constructor can't be an async method");
+        method.kind = "constructor";
+        hadConstructor = true;
+      }
+    }
+    this$1.parseClassMethod(classBody, method, isGenerator, isAsync);
+    if (isGetSet) {
+      var paramCount = method.kind === "get" ? 0 : 1;
+      if (method.value.params.length !== paramCount) {
+        var start = method.value.start;
+        if (method.kind === "get")
+          this$1.raiseRecoverable(start, "getter should have no params");
+        else
+          this$1.raiseRecoverable(start, "setter should have exactly one param");
+      } else {
+        if (method.kind === "set" && method.value.params[0].type === "RestElement")
+          this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params");
+      }
+    }
+  }
+  node.body = this.finishNode(classBody, "ClassBody");
+  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
+};
+
+pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
+  method.value = this.parseMethod(isGenerator, isAsync);
+  classBody.body.push(this.finishNode(method, "MethodDefinition"));
+};
+
+pp$1.parseClassId = function(node, isStatement) {
+  node.id = this.type === types.name ? this.parseIdent() : isStatement ? this.unexpected() : null;
+};
+
+pp$1.parseClassSuper = function(node) {
+  node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
+};
+
+// Parses module export declaration.
+
+pp$1.parseExport = function(node, exports) {
+  var this$1 = this;
+
+  this.next();
+  // export * from '...'
+  if (this.eat(types.star)) {
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
+    this.semicolon();
+    return this.finishNode(node, "ExportAllDeclaration")
+  }
+  if (this.eat(types._default)) { // export default ...
+    this.checkExport(exports, "default", this.lastTokStart);
+    var parens = this.type == types.parenL;
+    var expr = this.parseMaybeAssign();
+    var needsSemi = true;
+    if (!parens && (expr.type == "FunctionExpression" ||
+                    expr.type == "ClassExpression")) {
+      needsSemi = false;
+      if (expr.id) {
+        expr.type = expr.type == "FunctionExpression"
+          ? "FunctionDeclaration"
+          : "ClassDeclaration";
+      }
+    }
+    node.declaration = expr;
+    if (needsSemi) this.semicolon();
+    return this.finishNode(node, "ExportDefaultDeclaration")
+  }
+  // export var|const|let|function|class ...
+  if (this.shouldParseExportStatement()) {
+    node.declaration = this.parseStatement(true);
+    if (node.declaration.type === "VariableDeclaration")
+      this.checkVariableExport(exports, node.declaration.declarations);
+    else
+      this.checkExport(exports, node.declaration.id.name, node.declaration.id.start);
+    node.specifiers = [];
+    node.source = null;
+  } else { // export { x, y as z } [from '...']
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifiers(exports);
+    if (this.eatContextual("from")) {
+      node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
+    } else {
+      // check for keywords used as local names
+      for (var i = 0; i < node.specifiers.length; i++) {
+        if (this$1.keywords.test(node.specifiers[i].local.name) || this$1.reservedWords.test(node.specifiers[i].local.name)) {
+          this$1.unexpected(node.specifiers[i].local.start);
+        }
+      }
+
+      node.source = null;
+    }
+    this.semicolon();
+  }
+  return this.finishNode(node, "ExportNamedDeclaration")
+};
+
+pp$1.checkExport = function(exports, name, pos) {
+  if (!exports) return
+  if (Object.prototype.hasOwnProperty.call(exports, name))
+    this.raiseRecoverable(pos, "Duplicate export '" + name + "'");
+  exports[name] = true;
+};
+
+pp$1.checkPatternExport = function(exports, pat) {
+  var this$1 = this;
+
+  var type = pat.type;
+  if (type == "Identifier")
+    this.checkExport(exports, pat.name, pat.start);
+  else if (type == "ObjectPattern")
+    for (var i = 0; i < pat.properties.length; ++i)
+      this$1.checkPatternExport(exports, pat.properties[i].value);
+  else if (type == "ArrayPattern")
+    for (var i$1 = 0; i$1 < pat.elements.length; ++i$1) {
+      var elt = pat.elements[i$1];
+      if (elt) this$1.checkPatternExport(exports, elt);
+    }
+  else if (type == "AssignmentPattern")
+    this.checkPatternExport(exports, pat.left);
+  else if (type == "ParenthesizedExpression")
+    this.checkPatternExport(exports, pat.expression);
+};
+
+pp$1.checkVariableExport = function(exports, decls) {
+  var this$1 = this;
+
+  if (!exports) return
+  for (var i = 0; i < decls.length; i++)
+    this$1.checkPatternExport(exports, decls[i].id);
+};
+
+pp$1.shouldParseExportStatement = function() {
+  return this.type.keyword === "var"
+    || this.type.keyword === "const"
+    || this.type.keyword === "class"
+    || this.type.keyword === "function"
+    || this.isLet()
+    || this.isAsyncFunction()
+};
+
+// Parses a comma-separated list of module exports.
+
+pp$1.parseExportSpecifiers = function(exports) {
+  var this$1 = this;
+
+  var nodes = [], first = true;
+  // export { x, y as z } [from '...']
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    if (!first) {
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) break
+    } else first = false;
+
+    var node = this$1.startNode();
+    node.local = this$1.parseIdent(this$1.type === types._default);
+    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
+    this$1.checkExport(exports, node.exported.name, node.exported.start);
+    nodes.push(this$1.finishNode(node, "ExportSpecifier"));
+  }
+  return nodes
+};
+
+// Parses import declaration.
+
+pp$1.parseImport = function(node) {
+  this.next();
+  // import '...'
+  if (this.type === types.string) {
+    node.specifiers = empty;
+    node.source = this.parseExprAtom();
+  } else {
+    node.specifiers = this.parseImportSpecifiers();
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
+  }
+  this.semicolon();
+  return this.finishNode(node, "ImportDeclaration")
+};
+
+// Parses a comma-separated list of module imports.
+
+pp$1.parseImportSpecifiers = function() {
+  var this$1 = this;
+
+  var nodes = [], first = true;
+  if (this.type === types.name) {
+    // import defaultObj, { x, y as z } from '...'
+    var node = this.startNode();
+    node.local = this.parseIdent();
+    this.checkLVal(node.local, true);
+    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+    if (!this.eat(types.comma)) return nodes
+  }
+  if (this.type === types.star) {
+    var node$1 = this.startNode();
+    this.next();
+    this.expectContextual("as");
+    node$1.local = this.parseIdent();
+    this.checkLVal(node$1.local, true);
+    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
+    return nodes
+  }
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    if (!first) {
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) break
+    } else first = false;
+
+    var node$2 = this$1.startNode();
+    node$2.imported = this$1.parseIdent(true);
+    if (this$1.eatContextual("as")) {
+      node$2.local = this$1.parseIdent();
+    } else {
+      node$2.local = node$2.imported;
+      if (this$1.isKeyword(node$2.local.name)) this$1.unexpected(node$2.local.start);
+      if (this$1.reservedWordsStrict.test(node$2.local.name)) this$1.raiseRecoverable(node$2.local.start, "The keyword '" + node$2.local.name + "' is reserved");
+    }
+    this$1.checkLVal(node$2.local, true);
+    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
+  }
+  return nodes
+};
+
+var pp$2 = Parser.prototype;
+
+// Convert existing expression atom to assignable pattern
+// if possible.
+
+pp$2.toAssignable = function(node, isBinding) {
+  var this$1 = this;
+
+  if (this.options.ecmaVersion >= 6 && node) {
+    switch (node.type) {
+      case "Identifier":
+      if (this.inAsync && node.name === "await")
+        this.raise(node.start, "Can not use 'await' as identifier inside an async function");
+      break
+
+    case "ObjectPattern":
+    case "ArrayPattern":
+      break
+
+    case "ObjectExpression":
+      node.type = "ObjectPattern";
+      for (var i = 0; i < node.properties.length; i++) {
+        var prop = node.properties[i];
+        if (prop.kind !== "init") this$1.raise(prop.key.start, "Object pattern can't contain getter or setter");
+        this$1.toAssignable(prop.value, isBinding);
+      }
+      break
+
+    case "ArrayExpression":
+      node.type = "ArrayPattern";
+      this.toAssignableList(node.elements, isBinding);
+      break
+
+    case "AssignmentExpression":
+      if (node.operator === "=") {
+        node.type = "AssignmentPattern";
+        delete node.operator;
+        this.toAssignable(node.left, isBinding);
+        // falls through to AssignmentPattern
+      } else {
+        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
+        break
+      }
+
+    case "AssignmentPattern":
+      break
+
+    case "ParenthesizedExpression":
+      node.expression = this.toAssignable(node.expression, isBinding);
+      break
+
+    case "MemberExpression":
+      if (!isBinding) break
+
+    default:
+      this.raise(node.start, "Assigning to rvalue");
+    }
+  }
+  return node
+};
+
+// Convert list of expression atoms to binding list.
+
+pp$2.toAssignableList = function(exprList, isBinding) {
+  var this$1 = this;
+
+  var end = exprList.length;
+  if (end) {
+    var last = exprList[end - 1];
+    if (last && last.type == "RestElement") {
+      --end;
+    } else if (last && last.type == "SpreadElement") {
+      last.type = "RestElement";
+      var arg = last.argument;
+      this.toAssignable(arg, isBinding);
+      if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
+        this.unexpected(arg.start);
+      --end;
+    }
+
+    if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
+      this.unexpected(last.argument.start);
+  }
+  for (var i = 0; i < end; i++) {
+    var elt = exprList[i];
+    if (elt) this$1.toAssignable(elt, isBinding);
+  }
+  return exprList
+};
+
+// Parses spread element.
+
+pp$2.parseSpread = function(refDestructuringErrors) {
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
+  return this.finishNode(node, "SpreadElement")
+};
+
+pp$2.parseRest = function(allowNonIdent) {
+  var node = this.startNode();
+  this.next();
+
+  // RestElement inside of a function parameter must be an identifier
+  if (allowNonIdent) node.argument = this.type === types.name ? this.parseIdent() : this.unexpected();
+  else node.argument = this.type === types.name || this.type === types.bracketL ? this.parseBindingAtom() : this.unexpected();
+
+  return this.finishNode(node, "RestElement")
+};
+
+// Parses lvalue (assignable) atom.
+
+pp$2.parseBindingAtom = function() {
+  if (this.options.ecmaVersion < 6) return this.parseIdent()
+  switch (this.type) {
+  case types.name:
+    return this.parseIdent()
+
+  case types.bracketL:
+    var node = this.startNode();
+    this.next();
+    node.elements = this.parseBindingList(types.bracketR, true, true);
+    return this.finishNode(node, "ArrayPattern")
+
+  case types.braceL:
+    return this.parseObj(true)
+
+  default:
+    this.unexpected();
+  }
+};
+
+pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) {
+  var this$1 = this;
+
+  var elts = [], first = true;
+  while (!this.eat(close)) {
+    if (first) first = false;
+    else this$1.expect(types.comma);
+    if (allowEmpty && this$1.type === types.comma) {
+      elts.push(null);
+    } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
+      break
+    } else if (this$1.type === types.ellipsis) {
+      var rest = this$1.parseRest(allowNonIdent);
+      this$1.parseBindingListItem(rest);
+      elts.push(rest);
+      if (this$1.type === types.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element");
+      this$1.expect(close);
+      break
+    } else {
+      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
+      this$1.parseBindingListItem(elem);
+      elts.push(elem);
+    }
+  }
+  return elts
+};
+
+pp$2.parseBindingListItem = function(param) {
+  return param
+};
+
+// Parses assignment pattern around given atom if possible.
+
+pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
+  left = left || this.parseBindingAtom();
+  if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) return left
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.right = this.parseMaybeAssign();
+  return this.finishNode(node, "AssignmentPattern")
+};
+
+// Verify that a node is an lval — something that can be assigned
+// to.
+
+pp$2.checkLVal = function(expr, isBinding, checkClashes) {
+  var this$1 = this;
+
+  switch (expr.type) {
+  case "Identifier":
+    if (this.strict && this.reservedWordsStrictBind.test(expr.name))
+      this.raiseRecoverable(expr.start, (isBinding ? "Binding " : "Assigning to ") + expr.name + " in strict mode");
+    if (checkClashes) {
+      if (has(checkClashes, expr.name))
+        this.raiseRecoverable(expr.start, "Argument name clash");
+      checkClashes[expr.name] = true;
+    }
+    break
+
+  case "MemberExpression":
+    if (isBinding) this.raiseRecoverable(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression");
+    break
+
+  case "ObjectPattern":
+    for (var i = 0; i < expr.properties.length; i++)
+      this$1.checkLVal(expr.properties[i].value, isBinding, checkClashes);
+    break
+
+  case "ArrayPattern":
+    for (var i$1 = 0; i$1 < expr.elements.length; i$1++) {
+      var elem = expr.elements[i$1];
+      if (elem) this$1.checkLVal(elem, isBinding, checkClashes);
+    }
+    break
+
+  case "AssignmentPattern":
+    this.checkLVal(expr.left, isBinding, checkClashes);
+    break
+
+  case "RestElement":
+    this.checkLVal(expr.argument, isBinding, checkClashes);
+    break
+
+  case "ParenthesizedExpression":
+    this.checkLVal(expr.expression, isBinding, checkClashes);
+    break
+
+  default:
+    this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue");
+  }
+};
+
+// A recursive descent parser operates by defining functions for all
+// syntactic elements, and recursively calling those, each function
+// advancing the input stream and returning an AST node. Precedence
+// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
+// instead of `(!x)[1]` is handled by the fact that the parser
+// function that parses unary prefix operators is called first, and
+// in turn calls the function that parses `[]` subscripts — that
+// way, it'll receive the node for `x[1]` already parsed, and wraps
+// *that* in the unary operator node.
+//
+// Acorn uses an [operator precedence parser][opp] to handle binary
+// operator precedence, because it is much more compact than using
+// the technique outlined above, which uses different, nesting
+// functions to specify precedence, for all of the ten binary
+// precedence levels that JavaScript defines.
+//
+// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
+
+var pp$3 = Parser.prototype;
+
+// Check if property name clashes with already added.
+// Object/class getters and setters are not allowed to clash —
+// either with each other or with an init property — and in
+// strict mode, init properties are also not allowed to be repeated.
+
+pp$3.checkPropClash = function(prop, propHash) {
+  if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
+    return
+  var key = prop.key;
+  var name;
+  switch (key.type) {
+  case "Identifier": name = key.name; break
+  case "Literal": name = String(key.value); break
+  default: return
+  }
+  var kind = prop.kind;
+  if (this.options.ecmaVersion >= 6) {
+    if (name === "__proto__" && kind === "init") {
+      if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property");
+      propHash.proto = true;
+    }
+    return
+  }
+  name = "$" + name;
+  var other = propHash[name];
+  if (other) {
+    var isGetSet = kind !== "init";
+    if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init))
+      this.raiseRecoverable(key.start, "Redefinition of property");
+  } else {
+    other = propHash[name] = {
+      init: false,
+      get: false,
+      set: false
+    };
+  }
+  other[kind] = true;
+};
+
+// ### Expression parsing
+
+// These nest, from the most general expression type at the top to
+// 'atomic', nondivisible expression types at the bottom. Most of
+// the functions will simply let the function(s) below them parse,
+// and, *if* the syntactic construct they handle is present, wrap
+// the AST node that the inner parser gave them in another node.
+
+// Parse a full expression. The optional arguments are used to
+// forbid the `in` operator (in for loops initalization expressions)
+// and provide reference for storing '=' operator inside shorthand
+// property assignment in contexts where both object expression
+// and object pattern might appear (so it's possible to raise
+// delayed syntax error at correct position).
+
+pp$3.parseExpression = function(noIn, refDestructuringErrors) {
+  var this$1 = this;
+
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
+  if (this.type === types.comma) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.expressions = [expr];
+    while (this.eat(types.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors));
+    return this.finishNode(node, "SequenceExpression")
+  }
+  return expr
+};
+
+// Parse an assignment expression. This includes applications of
+// operators like `+=`.
+
+pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
+  if (this.inGenerator && this.isContextual("yield")) return this.parseYield()
+
+  var ownDestructuringErrors = false;
+  if (!refDestructuringErrors) {
+    refDestructuringErrors = new DestructuringErrors;
+    ownDestructuringErrors = true;
+  }
+  var startPos = this.start, startLoc = this.startLoc;
+  if (this.type == types.parenL || this.type == types.name)
+    this.potentialArrowAt = this.start;
+  var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
+  if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc);
+  if (this.type.isAssign) {
+    this.checkPatternErrors(refDestructuringErrors, true);
+    if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors);
+    var node = this.startNodeAt(startPos, startLoc);
+    node.operator = this.value;
+    node.left = this.type === types.eq ? this.toAssignable(left) : left;
+    refDestructuringErrors.shorthandAssign = 0; // reset because shorthand default was used correctly
+    this.checkLVal(left);
+    this.next();
+    node.right = this.parseMaybeAssign(noIn);
+    return this.finishNode(node, "AssignmentExpression")
+  } else {
+    if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true);
+  }
+  return left
+};
+
+// Parse a ternary conditional (`?:`) operator.
+
+pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprOps(noIn, refDestructuringErrors);
+  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+  if (this.eat(types.question)) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    this.expect(types.colon);
+    node.alternate = this.parseMaybeAssign(noIn);
+    return this.finishNode(node, "ConditionalExpression")
+  }
+  return expr
+};
+
+// Start the precedence parser.
+
+pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeUnary(refDestructuringErrors, false);
+  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+  return this.parseExprOp(expr, startPos, startLoc, -1, noIn)
+};
+
+// Parse binary operators with the operator precedence parsing
+// algorithm. `left` is the left-hand side of the operator.
+// `minPrec` provides context that allows the function to stop and
+// defer further parser to one of its callers when it encounters an
+// operator that has a lower precedence than the set it is parsing.
+
+pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
+  var prec = this.type.binop;
+  if (prec != null && (!noIn || this.type !== types._in)) {
+    if (prec > minPrec) {
+      var logical = this.type === types.logicalOR || this.type === types.logicalAND;
+      var op = this.value;
+      this.next();
+      var startPos = this.start, startLoc = this.startLoc;
+      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
+      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
+      return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
+    }
+  }
+  return left
+};
+
+pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.operator = op;
+  node.right = right;
+  return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
+};
+
+// Parse unary operators, both prefix and postfix.
+
+pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
+  var this$1 = this;
+
+  var startPos = this.start, startLoc = this.startLoc, expr;
+  if (this.inAsync && this.isContextual("await")) {
+    expr = this.parseAwait(refDestructuringErrors);
+    sawUnary = true;
+  } else if (this.type.prefix) {
+    var node = this.startNode(), update = this.type === types.incDec;
+    node.operator = this.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary(null, true);
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    if (update) this.checkLVal(node.argument);
+    else if (this.strict && node.operator === "delete" &&
+             node.argument.type === "Identifier")
+      this.raiseRecoverable(node.start, "Deleting local variable in strict mode");
+    else sawUnary = true;
+    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
+  } else {
+    expr = this.parseExprSubscripts(refDestructuringErrors);
+    if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+    while (this.type.postfix && !this.canInsertSemicolon()) {
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.operator = this$1.value;
+      node$1.prefix = false;
+      node$1.argument = expr;
+      this$1.checkLVal(expr);
+      this$1.next();
+      expr = this$1.finishNode(node$1, "UpdateExpression");
+    }
+  }
+
+  if (!sawUnary && this.eat(types.starstar))
+    return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false)
+  else
+    return expr
+};
+
+// Parse call, dot, and `[]`-subscript expressions.
+
+pp$3.parseExprSubscripts = function(refDestructuringErrors) {
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprAtom(refDestructuringErrors);
+  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
+  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr
+  return this.parseSubscripts(expr, startPos, startLoc)
+};
+
+pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
+  var this$1 = this;
+
+  for (;;) {
+    var maybeAsyncArrow = this$1.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon();
+    if (this$1.eat(types.dot)) {
+      var node = this$1.startNodeAt(startPos, startLoc);
+      node.object = base;
+      node.property = this$1.parseIdent(true);
+      node.computed = false;
+      base = this$1.finishNode(node, "MemberExpression");
+    } else if (this$1.eat(types.bracketL)) {
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.object = base;
+      node$1.property = this$1.parseExpression();
+      node$1.computed = true;
+      this$1.expect(types.bracketR);
+      base = this$1.finishNode(node$1, "MemberExpression");
+    } else if (!noCalls && this$1.eat(types.parenL)) {
+      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
+      this$1.yieldPos = 0;
+      this$1.awaitPos = 0;
+      var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
+      if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) {
+        this$1.checkPatternErrors(refDestructuringErrors, true);
+        this$1.checkYieldAwaitInDefaultParams();
+        this$1.yieldPos = oldYieldPos;
+        this$1.awaitPos = oldAwaitPos;
+        return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
+      }
+      this$1.checkExpressionErrors(refDestructuringErrors, true);
+      this$1.yieldPos = oldYieldPos || this$1.yieldPos;
+      this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
+      var node$2 = this$1.startNodeAt(startPos, startLoc);
+      node$2.callee = base;
+      node$2.arguments = exprList;
+      base = this$1.finishNode(node$2, "CallExpression");
+    } else if (this$1.type === types.backQuote) {
+      var node$3 = this$1.startNodeAt(startPos, startLoc);
+      node$3.tag = base;
+      node$3.quasi = this$1.parseTemplate();
+      base = this$1.finishNode(node$3, "TaggedTemplateExpression");
+    } else {
+      return base
+    }
+  }
+};
+
+// Parse an atomic expression — either a single token that is an
+// expression, an expression started by a keyword like `function` or
+// `new`, or an expression wrapped in punctuation like `()`, `[]`,
+// or `{}`.
+
+pp$3.parseExprAtom = function(refDestructuringErrors) {
+  var node, canBeArrow = this.potentialArrowAt == this.start;
+  switch (this.type) {
+  case types._super:
+    if (!this.inFunction)
+      this.raise(this.start, "'super' outside of function or class");
+
+  case types._this:
+    var type = this.type === types._this ? "ThisExpression" : "Super";
+    node = this.startNode();
+    this.next();
+    return this.finishNode(node, type)
+
+  case types.name:
+    var startPos = this.start, startLoc = this.startLoc;
+    var id = this.parseIdent(this.type !== types.name);
+    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
+      return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true)
+    if (canBeArrow && !this.canInsertSemicolon()) {
+      if (this.eat(types.arrow))
+        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)
+      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name) {
+        id = this.parseIdent();
+        if (this.canInsertSemicolon() || !this.eat(types.arrow))
+          this.unexpected();
+        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
+      }
+    }
+    return id
+
+  case types.regexp:
+    var value = this.value;
+    node = this.parseLiteral(value.value);
+    node.regex = {pattern: value.pattern, flags: value.flags};
+    return node
+
+  case types.num: case types.string:
+    return this.parseLiteral(this.value)
+
+  case types._null: case types._true: case types._false:
+    node = this.startNode();
+    node.value = this.type === types._null ? null : this.type === types._true;
+    node.raw = this.type.keyword;
+    this.next();
+    return this.finishNode(node, "Literal")
+
+  case types.parenL:
+    return this.parseParenAndDistinguishExpression(canBeArrow)
+
+  case types.bracketL:
+    node = this.startNode();
+    this.next();
+    node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
+    return this.finishNode(node, "ArrayExpression")
+
+  case types.braceL:
+    return this.parseObj(false, refDestructuringErrors)
+
+  case types._function:
+    node = this.startNode();
+    this.next();
+    return this.parseFunction(node, false)
+
+  case types._class:
+    return this.parseClass(this.startNode(), false)
+
+  case types._new:
+    return this.parseNew()
+
+  case types.backQuote:
+    return this.parseTemplate()
+
+  default:
+    this.unexpected();
+  }
+};
+
+pp$3.parseLiteral = function(value) {
+  var node = this.startNode();
+  node.value = value;
+  node.raw = this.input.slice(this.start, this.end);
+  this.next();
+  return this.finishNode(node, "Literal")
+};
+
+pp$3.parseParenExpression = function() {
+  this.expect(types.parenL);
+  var val = this.parseExpression();
+  this.expect(types.parenR);
+  return val
+};
+
+pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
+  var this$1 = this;
+
+  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
+  if (this.options.ecmaVersion >= 6) {
+    this.next();
+
+    var innerStartPos = this.start, innerStartLoc = this.startLoc;
+    var exprList = [], first = true, lastIsComma = false;
+    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart;
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    while (this.type !== types.parenR) {
+      first ? first = false : this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
+        lastIsComma = true;
+        break
+      } else if (this$1.type === types.ellipsis) {
+        spreadStart = this$1.start;
+        exprList.push(this$1.parseParenItem(this$1.parseRest()));
+        if (this$1.type === types.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element");
+        break
+      } else {
+        if (this$1.type === types.parenL && !innerParenStart) {
+          innerParenStart = this$1.start;
+        }
+        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
+      }
+    }
+    var innerEndPos = this.start, innerEndLoc = this.startLoc;
+    this.expect(types.parenR);
+
+    if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
+      this.checkPatternErrors(refDestructuringErrors, true);
+      this.checkYieldAwaitInDefaultParams();
+      if (innerParenStart) this.unexpected(innerParenStart);
+      this.yieldPos = oldYieldPos;
+      this.awaitPos = oldAwaitPos;
+      return this.parseParenArrowList(startPos, startLoc, exprList)
+    }
+
+    if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart);
+    if (spreadStart) this.unexpected(spreadStart);
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    this.yieldPos = oldYieldPos || this.yieldPos;
+    this.awaitPos = oldAwaitPos || this.awaitPos;
+
+    if (exprList.length > 1) {
+      val = this.startNodeAt(innerStartPos, innerStartLoc);
+      val.expressions = exprList;
+      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
+    } else {
+      val = exprList[0];
+    }
+  } else {
+    val = this.parseParenExpression();
+  }
+
+  if (this.options.preserveParens) {
+    var par = this.startNodeAt(startPos, startLoc);
+    par.expression = val;
+    return this.finishNode(par, "ParenthesizedExpression")
+  } else {
+    return val
+  }
+};
+
+pp$3.parseParenItem = function(item) {
+  return item
+};
+
+pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
+  return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
+};
+
+// New's precedence is slightly tricky. It must allow its argument to
+// be a `[]` or dot subscript expression, but not a call — at least,
+// not without wrapping it in parentheses. Thus, it uses the noCalls
+// argument to parseSubscripts to prevent it from consuming the
+// argument list.
+
+var empty$1 = [];
+
+pp$3.parseNew = function() {
+  var node = this.startNode();
+  var meta = this.parseIdent(true);
+  if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
+    node.meta = meta;
+    node.property = this.parseIdent(true);
+    if (node.property.name !== "target")
+      this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target");
+    if (!this.inFunction)
+      this.raiseRecoverable(node.start, "new.target can only be used in functions");
+    return this.finishNode(node, "MetaProperty")
+  }
+  var startPos = this.start, startLoc = this.startLoc;
+  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
+  if (this.eat(types.parenL)) node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false);
+  else node.arguments = empty$1;
+  return this.finishNode(node, "NewExpression")
+};
+
+// Parse template expression.
+
+pp$3.parseTemplateElement = function() {
+  var elem = this.startNode();
+  elem.value = {
+    raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, '\n'),
+    cooked: this.value
+  };
+  this.next();
+  elem.tail = this.type === types.backQuote;
+  return this.finishNode(elem, "TemplateElement")
+};
+
+pp$3.parseTemplate = function() {
+  var this$1 = this;
+
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement();
+  node.quasis = [curElt];
+  while (!curElt.tail) {
+    this$1.expect(types.dollarBraceL);
+    node.expressions.push(this$1.parseExpression());
+    this$1.expect(types.braceR);
+    node.quasis.push(curElt = this$1.parseTemplateElement());
+  }
+  this.next();
+  return this.finishNode(node, "TemplateLiteral")
+};
+
+// Parse an object literal or binding pattern.
+
+pp$3.parseObj = function(isPattern, refDestructuringErrors) {
+  var this$1 = this;
+
+  var node = this.startNode(), first = true, propHash = {};
+  node.properties = [];
+  this.next();
+  while (!this.eat(types.braceR)) {
+    if (!first) {
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) break
+    } else first = false;
+
+    var prop = this$1.startNode(), isGenerator, isAsync, startPos, startLoc;
+    if (this$1.options.ecmaVersion >= 6) {
+      prop.method = false;
+      prop.shorthand = false;
+      if (isPattern || refDestructuringErrors) {
+        startPos = this$1.start;
+        startLoc = this$1.startLoc;
+      }
+      if (!isPattern)
+        isGenerator = this$1.eat(types.star);
+    }
+    this$1.parsePropertyName(prop);
+    if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && !prop.computed &&
+        prop.key.type === "Identifier" && prop.key.name === "async" && this$1.type !== types.parenL &&
+        this$1.type !== types.colon && !this$1.canInsertSemicolon()) {
+      isAsync = true;
+      this$1.parsePropertyName(prop, refDestructuringErrors);
+    } else {
+      isAsync = false;
+    }
+    this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors);
+    this$1.checkPropClash(prop, propHash);
+    node.properties.push(this$1.finishNode(prop, "Property"));
+  }
+  return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
+};
+
+pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) {
+  if ((isGenerator || isAsync) && this.type === types.colon)
+    this.unexpected();
+
+  if (this.eat(types.colon)) {
+    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
+    prop.kind = "init";
+  } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
+    if (isPattern) this.unexpected();
+    prop.kind = "init";
+    prop.method = true;
+    prop.value = this.parseMethod(isGenerator, isAsync);
+  } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
+             (prop.key.name === "get" || prop.key.name === "set") &&
+             (this.type != types.comma && this.type != types.braceR)) {
+    if (isGenerator || isAsync || isPattern) this.unexpected();
+    prop.kind = prop.key.name;
+    this.parsePropertyName(prop);
+    prop.value = this.parseMethod(false);
+    var paramCount = prop.kind === "get" ? 0 : 1;
+    if (prop.value.params.length !== paramCount) {
+      var start = prop.value.start;
+      if (prop.kind === "get")
+        this.raiseRecoverable(start, "getter should have no params");
+      else
+        this.raiseRecoverable(start, "setter should have exactly one param");
+    } else {
+      if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
+        this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params");
+    }
+  } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
+    if (this.keywords.test(prop.key.name) ||
+        (this.strict ? this.reservedWordsStrict : this.reservedWords).test(prop.key.name) ||
+        (this.inGenerator && prop.key.name == "yield") ||
+        (this.inAsync && prop.key.name == "await"))
+      this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property");
+    prop.kind = "init";
+    if (isPattern) {
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+    } else if (this.type === types.eq && refDestructuringErrors) {
+      if (!refDestructuringErrors.shorthandAssign)
+        refDestructuringErrors.shorthandAssign = this.start;
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+    } else {
+      prop.value = prop.key;
+    }
+    prop.shorthand = true;
+  } else this.unexpected();
+};
+
+pp$3.parsePropertyName = function(prop) {
+  if (this.options.ecmaVersion >= 6) {
+    if (this.eat(types.bracketL)) {
+      prop.computed = true;
+      prop.key = this.parseMaybeAssign();
+      this.expect(types.bracketR);
+      return prop.key
+    } else {
+      prop.computed = false;
+    }
+  }
+  return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
+};
+
+// Initialize empty function node.
+
+pp$3.initFunction = function(node) {
+  node.id = null;
+  if (this.options.ecmaVersion >= 6) {
+    node.generator = false;
+    node.expression = false;
+  }
+  if (this.options.ecmaVersion >= 8)
+    node.async = false;
+};
+
+// Parse object or class method.
+
+pp$3.parseMethod = function(isGenerator, isAsync) {
+  var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+
+  this.initFunction(node);
+  if (this.options.ecmaVersion >= 6)
+    node.generator = isGenerator;
+  if (this.options.ecmaVersion >= 8)
+    node.async = !!isAsync;
+
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+  this.checkYieldAwaitInDefaultParams();
+  this.parseFunctionBody(node, false);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  return this.finishNode(node, "FunctionExpression")
+};
+
+// Parse arrow function expression with given parameters.
+
+pp$3.parseArrowExpression = function(node, params, isAsync) {
+  var oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos;
+
+  this.initFunction(node);
+  if (this.options.ecmaVersion >= 8)
+    node.async = !!isAsync;
+
+  this.inGenerator = false;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+
+  node.params = this.toAssignableList(params, true);
+  this.parseFunctionBody(node, true);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  return this.finishNode(node, "ArrowFunctionExpression")
+};
+
+// Parse function body and check parameters.
+
+pp$3.parseFunctionBody = function(node, isArrowFunction) {
+  var isExpression = isArrowFunction && this.type !== types.braceL;
+
+  if (isExpression) {
+    node.body = this.parseMaybeAssign();
+    node.expression = true;
+  } else {
+    // Start a new scope with regard to labels and the `inFunction`
+    // flag (restore them to their old value afterwards).
+    var oldInFunc = this.inFunction, oldLabels = this.labels;
+    this.inFunction = true; this.labels = [];
+    node.body = this.parseBlock(true);
+    node.expression = false;
+    this.inFunction = oldInFunc; this.labels = oldLabels;
+  }
+
+  // If this is a strict mode function, verify that argument names
+  // are not repeated, and it does not try to bind the words `eval`
+  // or `arguments`.
+  var useStrict = (!isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) ? node.body.body[0] : null;
+  if (useStrict && this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params))
+    this.raiseRecoverable(useStrict.start, "Illegal 'use strict' directive in function with non-simple parameter list");
+
+  if (this.strict || useStrict) {
+    var oldStrict = this.strict;
+    this.strict = true;
+    if (node.id)
+      this.checkLVal(node.id, true);
+    this.checkParams(node);
+    this.strict = oldStrict;
+  } else if (isArrowFunction || !this.isSimpleParamList(node.params)) {
+    this.checkParams(node);
+  }
+};
+
+pp$3.isSimpleParamList = function(params) {
+  for (var i = 0; i < params.length; i++)
+    if (params[i].type !== "Identifier") return false
+  return true
+};
+
+// Checks function params for various disallowed patterns such as using "eval"
+// or "arguments" and duplicate parameters.
+
+pp$3.checkParams = function(node) {
+  var this$1 = this;
+
+  var nameHash = {};
+  for (var i = 0; i < node.params.length; i++) this$1.checkLVal(node.params[i], true, nameHash);
+};
+
+// Parses a comma-separated list of expressions, and returns them as
+// an array. `close` is the token type that ends the list, and
+// `allowEmpty` can be turned on to allow subsequent commas with
+// nothing in between them to be parsed as `null` (which is needed
+// for array literals).
+
+pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
+  var this$1 = this;
+
+  var elts = [], first = true;
+  while (!this.eat(close)) {
+    if (!first) {
+      this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(close)) break
+    } else first = false;
+
+    var elt;
+    if (allowEmpty && this$1.type === types.comma)
+      elt = null;
+    else if (this$1.type === types.ellipsis) {
+      elt = this$1.parseSpread(refDestructuringErrors);
+      if (this$1.type === types.comma && refDestructuringErrors && !refDestructuringErrors.trailingComma) {
+        refDestructuringErrors.trailingComma = this$1.start;
+      }
+    } else
+      elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
+    elts.push(elt);
+  }
+  return elts
+};
+
+// Parse the next token as an identifier. If `liberal` is true (used
+// when parsing properties), it will also convert keywords into
+// identifiers.
+
+pp$3.parseIdent = function(liberal) {
+  var node = this.startNode();
+  if (liberal && this.options.allowReserved == "never") liberal = false;
+  if (this.type === types.name) {
+    if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) &&
+        (this.options.ecmaVersion >= 6 ||
+         this.input.slice(this.start, this.end).indexOf("\\") == -1))
+      this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved");
+    if (this.inGenerator && this.value === "yield")
+      this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator");
+    if (this.inAsync && this.value === "await")
+      this.raiseRecoverable(this.start, "Can not use 'await' as identifier inside an async function");
+    node.name = this.value;
+  } else if (liberal && this.type.keyword) {
+    node.name = this.type.keyword;
+  } else {
+    this.unexpected();
+  }
+  this.next();
+  return this.finishNode(node, "Identifier")
+};
+
+// Parses yield expression inside generator.
+
+pp$3.parseYield = function() {
+  if (!this.yieldPos) this.yieldPos = this.start;
+
+  var node = this.startNode();
+  this.next();
+  if (this.type == types.semi || this.canInsertSemicolon() || (this.type != types.star && !this.type.startsExpr)) {
+    node.delegate = false;
+    node.argument = null;
+  } else {
+    node.delegate = this.eat(types.star);
+    node.argument = this.parseMaybeAssign();
+  }
+  return this.finishNode(node, "YieldExpression")
+};
+
+pp$3.parseAwait = function() {
+  if (!this.awaitPos) this.awaitPos = this.start;
+
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeUnary(null, true);
+  return this.finishNode(node, "AwaitExpression")
+};
+
+var pp$4 = Parser.prototype;
+
+// This function is used to raise exceptions on parse errors. It
+// takes an offset integer (into the current `input`) to indicate
+// the location of the error, attaches the position to the end
+// of the error message, and then raises a `SyntaxError` with that
+// message.
+
+pp$4.raise = function(pos, message) {
+  var loc = getLineInfo(this.input, pos);
+  message += " (" + loc.line + ":" + loc.column + ")";
+  var err = new SyntaxError(message);
+  err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
+  throw err
+};
+
+pp$4.raiseRecoverable = pp$4.raise;
+
+pp$4.curPosition = function() {
+  if (this.options.locations) {
+    return new Position(this.curLine, this.pos - this.lineStart)
+  }
+};
+
+var Node = function Node(parser, pos, loc) {
+  this.type = "";
+  this.start = pos;
+  this.end = 0;
+  if (parser.options.locations)
+    this.loc = new SourceLocation(parser, loc);
+  if (parser.options.directSourceFile)
+    this.sourceFile = parser.options.directSourceFile;
+  if (parser.options.ranges)
+    this.range = [pos, 0];
+};
+
+// Start an AST node, attaching a start offset.
+
+var pp$5 = Parser.prototype;
+
+pp$5.startNode = function() {
+  return new Node(this, this.start, this.startLoc)
+};
+
+pp$5.startNodeAt = function(pos, loc) {
+  return new Node(this, pos, loc)
+};
+
+// Finish an AST node, adding `type` and `end` properties.
+
+function finishNodeAt(node, type, pos, loc) {
+  node.type = type;
+  node.end = pos;
+  if (this.options.locations)
+    node.loc.end = loc;
+  if (this.options.ranges)
+    node.range[1] = pos;
+  return node
+}
+
+pp$5.finishNode = function(node, type) {
+  return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
+};
+
+// Finish node at given position
+
+pp$5.finishNodeAt = function(node, type, pos, loc) {
+  return finishNodeAt.call(this, node, type, pos, loc)
+};
+
+// The algorithm used to determine whether a regexp can appear at a
+// given point in the program is loosely based on sweet.js' approach.
+// See https://github.com/mozilla/sweet.js/wiki/design
+
+var TokContext = function TokContext(token, isExpr, preserveSpace, override) {
+  this.token = token;
+  this.isExpr = !!isExpr;
+  this.preserveSpace = !!preserveSpace;
+  this.override = override;
+};
+
+var types$1 = {
+  b_stat: new TokContext("{", false),
+  b_expr: new TokContext("{", true),
+  b_tmpl: new TokContext("${", true),
+  p_stat: new TokContext("(", false),
+  p_expr: new TokContext("(", true),
+  q_tmpl: new TokContext("`", true, true, function (p) { return p.readTmplToken(); }),
+  f_expr: new TokContext("function", true)
+};
+
+var pp$6 = Parser.prototype;
+
+pp$6.initialContext = function() {
+  return [types$1.b_stat]
+};
+
+pp$6.braceIsBlock = function(prevType) {
+  if (prevType === types.colon) {
+    var parent = this.curContext();
+    if (parent === types$1.b_stat || parent === types$1.b_expr)
+      return !parent.isExpr
+  }
+  if (prevType === types._return)
+    return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+  if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR)
+    return true
+  if (prevType == types.braceL)
+    return this.curContext() === types$1.b_stat
+  return !this.exprAllowed
+};
+
+pp$6.updateContext = function(prevType) {
+  var update, type = this.type;
+  if (type.keyword && prevType == types.dot)
+    this.exprAllowed = false;
+  else if (update = type.updateContext)
+    update.call(this, prevType);
+  else
+    this.exprAllowed = type.beforeExpr;
+};
+
+// Token-specific context update code
+
+types.parenR.updateContext = types.braceR.updateContext = function() {
+  if (this.context.length == 1) {
+    this.exprAllowed = true;
+    return
+  }
+  var out = this.context.pop();
+  if (out === types$1.b_stat && this.curContext() === types$1.f_expr) {
+    this.context.pop();
+    this.exprAllowed = false;
+  } else if (out === types$1.b_tmpl) {
+    this.exprAllowed = true;
+  } else {
+    this.exprAllowed = !out.isExpr;
+  }
+};
+
+types.braceL.updateContext = function(prevType) {
+  this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
+  this.exprAllowed = true;
+};
+
+types.dollarBraceL.updateContext = function() {
+  this.context.push(types$1.b_tmpl);
+  this.exprAllowed = true;
+};
+
+types.parenL.updateContext = function(prevType) {
+  var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
+  this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
+  this.exprAllowed = true;
+};
+
+types.incDec.updateContext = function() {
+  // tokExprAllowed stays unchanged
+};
+
+types._function.updateContext = function(prevType) {
+  if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
+      !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
+    this.context.push(types$1.f_expr);
+  this.exprAllowed = false;
+};
+
+types.backQuote.updateContext = function() {
+  if (this.curContext() === types$1.q_tmpl)
+    this.context.pop();
+  else
+    this.context.push(types$1.q_tmpl);
+  this.exprAllowed = false;
+};
+
+// Object type used to represent tokens. Note that normally, tokens
+// simply exist as properties on the parser object. This is only
+// used for the onToken callback and the external tokenizer.
+
+var Token = function Token(p) {
+  this.type = p.type;
+  this.value = p.value;
+  this.start = p.start;
+  this.end = p.end;
+  if (p.options.locations)
+    this.loc = new SourceLocation(p, p.startLoc, p.endLoc);
+  if (p.options.ranges)
+    this.range = [p.start, p.end];
+};
+
+// ## Tokenizer
+
+var pp$7 = Parser.prototype;
+
+// Are we running under Rhino?
+var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
+
+// Move to the next token
+
+pp$7.next = function() {
+  if (this.options.onToken)
+    this.options.onToken(new Token(this));
+
+  this.lastTokEnd = this.end;
+  this.lastTokStart = this.start;
+  this.lastTokEndLoc = this.endLoc;
+  this.lastTokStartLoc = this.startLoc;
+  this.nextToken();
+};
+
+pp$7.getToken = function() {
+  this.next();
+  return new Token(this)
+};
+
+// If we're in an ES6 environment, make parsers iterable
+if (typeof Symbol !== "undefined")
+  pp$7[Symbol.iterator] = function () {
+    var self = this;
+    return {next: function () {
+      var token = self.getToken();
+      return {
+        done: token.type === types.eof,
+        value: token
+      }
+    }}
+  };
+
+// Toggle strict mode. Re-reads the next number or string to please
+// pedantic tests (`"use strict"; 010;` should fail).
+
+pp$7.setStrict = function(strict) {
+  var this$1 = this;
+
+  this.strict = strict;
+  if (this.type !== types.num && this.type !== types.string) return
+  this.pos = this.start;
+  if (this.options.locations) {
+    while (this.pos < this.lineStart) {
+      this$1.lineStart = this$1.input.lastIndexOf("\n", this$1.lineStart - 2) + 1;
+      --this$1.curLine;
+    }
+  }
+  this.nextToken();
+};
+
+pp$7.curContext = function() {
+  return this.context[this.context.length - 1]
+};
+
+// Read a single token, updating the parser object's token-related
+// properties.
+
+pp$7.nextToken = function() {
+  var curContext = this.curContext();
+  if (!curContext || !curContext.preserveSpace) this.skipSpace();
+
+  this.start = this.pos;
+  if (this.options.locations) this.startLoc = this.curPosition();
+  if (this.pos >= this.input.length) return this.finishToken(types.eof)
+
+  if (curContext.override) return curContext.override(this)
+  else this.readToken(this.fullCharCodeAtPos());
+};
+
+pp$7.readToken = function(code) {
+  // Identifier or keyword. '\uXXXX' sequences are allowed in
+  // identifiers, so '\' also dispatches to that.
+  if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
+    return this.readWord()
+
+  return this.getTokenFromCode(code)
+};
+
+pp$7.fullCharCodeAtPos = function() {
+  var code = this.input.charCodeAt(this.pos);
+  if (code <= 0xd7ff || code >= 0xe000) return code
+  var next = this.input.charCodeAt(this.pos + 1);
+  return (code << 10) + next - 0x35fdc00
+};
+
+pp$7.skipBlockComment = function() {
+  var this$1 = this;
+
+  var startLoc = this.options.onComment && this.curPosition();
+  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
+  if (end === -1) this.raise(this.pos - 2, "Unterminated comment");
+  this.pos = end + 2;
+  if (this.options.locations) {
+    lineBreakG.lastIndex = start;
+    var match;
+    while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
+      ++this$1.curLine;
+      this$1.lineStart = match.index + match[0].length;
+    }
+  }
+  if (this.options.onComment)
+    this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
+                           startLoc, this.curPosition());
+};
+
+pp$7.skipLineComment = function(startSkip) {
+  var this$1 = this;
+
+  var start = this.pos;
+  var startLoc = this.options.onComment && this.curPosition();
+  var ch = this.input.charCodeAt(this.pos+=startSkip);
+  while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
+    ++this$1.pos;
+    ch = this$1.input.charCodeAt(this$1.pos);
+  }
+  if (this.options.onComment)
+    this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
+                           startLoc, this.curPosition());
+};
+
+// Called at the start of the parse and after every token. Skips
+// whitespace and comments, and.
+
+pp$7.skipSpace = function() {
+  var this$1 = this;
+
+  loop: while (this.pos < this.input.length) {
+    var ch = this$1.input.charCodeAt(this$1.pos);
+    switch (ch) {
+      case 32: case 160: // ' '
+        ++this$1.pos;
+        break
+      case 13:
+        if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
+          ++this$1.pos;
+        }
+      case 10: case 8232: case 8233:
+        ++this$1.pos;
+        if (this$1.options.locations) {
+          ++this$1.curLine;
+          this$1.lineStart = this$1.pos;
+        }
+        break
+      case 47: // '/'
+        switch (this$1.input.charCodeAt(this$1.pos + 1)) {
+          case 42: // '*'
+            this$1.skipBlockComment();
+            break
+          case 47:
+            this$1.skipLineComment(2);
+            break
+          default:
+            break loop
+        }
+        break
+      default:
+        if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
+          ++this$1.pos;
+        } else {
+          break loop
+        }
+    }
+  }
+};
+
+// Called at the end of every token. Sets `end`, `val`, and
+// maintains `context` and `exprAllowed`, and skips the space after
+// the token, so that the next one's `start` will point at the
+// right position.
+
+pp$7.finishToken = function(type, val) {
+  this.end = this.pos;
+  if (this.options.locations) this.endLoc = this.curPosition();
+  var prevType = this.type;
+  this.type = type;
+  this.value = val;
+
+  this.updateContext(prevType);
+};
+
+// ### Token reading
+
+// This is the function that is called to fetch the next token. It
+// is somewhat obscure, because it works in character codes rather
+// than characters, and because operator parsing has been inlined
+// into it.
+//
+// All in the name of speed.
+//
+pp$7.readToken_dot = function() {
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next >= 48 && next <= 57) return this.readNumber(true)
+  var next2 = this.input.charCodeAt(this.pos + 2);
+  if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
+    this.pos += 3;
+    return this.finishToken(types.ellipsis)
+  } else {
+    ++this.pos;
+    return this.finishToken(types.dot)
+  }
+};
+
+pp$7.readToken_slash = function() { // '/'
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (this.exprAllowed) {++this.pos; return this.readRegexp()}
+  if (next === 61) return this.finishOp(types.assign, 2)
+  return this.finishOp(types.slash, 1)
+};
+
+pp$7.readToken_mult_modulo_exp = function(code) { // '%*'
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
+  var tokentype = code === 42 ? types.star : types.modulo;
+
+  // exponentiation operator ** and **=
+  if (this.options.ecmaVersion >= 7 && next === 42) {
+    ++size;
+    tokentype = types.starstar;
+    next = this.input.charCodeAt(this.pos + 2);
+  }
+
+  if (next === 61) return this.finishOp(types.assign, size + 1)
+  return this.finishOp(tokentype, size)
+};
+
+pp$7.readToken_pipe_amp = function(code) { // '|&'
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === code) return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2)
+  if (next === 61) return this.finishOp(types.assign, 2)
+  return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
+};
+
+pp$7.readToken_caret = function() { // '^'
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) return this.finishOp(types.assign, 2)
+  return this.finishOp(types.bitwiseXOR, 1)
+};
+
+pp$7.readToken_plus_min = function(code) { // '+-'
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === code) {
+    if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
+        lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
+      // A `-->` line comment
+      this.skipLineComment(3);
+      this.skipSpace();
+      return this.nextToken()
+    }
+    return this.finishOp(types.incDec, 2)
+  }
+  if (next === 61) return this.finishOp(types.assign, 2)
+  return this.finishOp(types.plusMin, 1)
+};
+
+pp$7.readToken_lt_gt = function(code) { // '<>'
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
+  if (next === code) {
+    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
+    if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(types.assign, size + 1)
+    return this.finishOp(types.bitShift, size)
+  }
+  if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
+      this.input.charCodeAt(this.pos + 3) == 45) {
+    if (this.inModule) this.unexpected();
+    // `<!--`, an XML-style comment that should be interpreted as a line comment
+    this.skipLineComment(4);
+    this.skipSpace();
+    return this.nextToken()
+  }
+  if (next === 61) size = 2;
+  return this.finishOp(types.relational, size)
+};
+
+pp$7.readToken_eq_excl = function(code) { // '=!'
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2)
+  if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
+    this.pos += 2;
+    return this.finishToken(types.arrow)
+  }
+  return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
+};
+
+pp$7.getTokenFromCode = function(code) {
+  switch (code) {
+    // The interpretation of a dot depends on whether it is followed
+    // by a digit or another two dots.
+  case 46: // '.'
+    return this.readToken_dot()
+
+    // Punctuation tokens.
+  case 40: ++this.pos; return this.finishToken(types.parenL)
+  case 41: ++this.pos; return this.finishToken(types.parenR)
+  case 59: ++this.pos; return this.finishToken(types.semi)
+  case 44: ++this.pos; return this.finishToken(types.comma)
+  case 91: ++this.pos; return this.finishToken(types.bracketL)
+  case 93: ++this.pos; return this.finishToken(types.bracketR)
+  case 123: ++this.pos; return this.finishToken(types.braceL)
+  case 125: ++this.pos; return this.finishToken(types.braceR)
+  case 58: ++this.pos; return this.finishToken(types.colon)
+  case 63: ++this.pos; return this.finishToken(types.question)
+
+  case 96: // '`'
+    if (this.options.ecmaVersion < 6) break
+    ++this.pos;
+    return this.finishToken(types.backQuote)
+
+  case 48: // '0'
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === 120 || next === 88) return this.readRadixNumber(16) // '0x', '0X' - hex number
+    if (this.options.ecmaVersion >= 6) {
+      if (next === 111 || next === 79) return this.readRadixNumber(8) // '0o', '0O' - octal number
+      if (next === 98 || next === 66) return this.readRadixNumber(2) // '0b', '0B' - binary number
+    }
+    // Anything else beginning with a digit is an integer, octal
+    // number, or float.
+  case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
+    return this.readNumber(false)
+
+    // Quotes produce strings.
+  case 34: case 39: // '"', "'"
+    return this.readString(code)
+
+    // Operators are parsed inline in tiny state machines. '=' (61) is
+    // often referred to. `finishOp` simply skips the amount of
+    // characters it is given as second argument, and returns a token
+    // of the type given by its first argument.
+
+  case 47: // '/'
+    return this.readToken_slash()
+
+  case 37: case 42: // '%*'
+    return this.readToken_mult_modulo_exp(code)
+
+  case 124: case 38: // '|&'
+    return this.readToken_pipe_amp(code)
+
+  case 94: // '^'
+    return this.readToken_caret()
+
+  case 43: case 45: // '+-'
+    return this.readToken_plus_min(code)
+
+  case 60: case 62: // '<>'
+    return this.readToken_lt_gt(code)
+
+  case 61: case 33: // '=!'
+    return this.readToken_eq_excl(code)
+
+  case 126: // '~'
+    return this.finishOp(types.prefix, 1)
+  }
+
+  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
+};
+
+pp$7.finishOp = function(type, size) {
+  var str = this.input.slice(this.pos, this.pos + size);
+  this.pos += size;
+  return this.finishToken(type, str)
+};
+
+// Parse a regular expression. Some context-awareness is necessary,
+// since a '/' inside a '[]' set does not end the expression.
+
+function tryCreateRegexp(src, flags, throwErrorAt, parser) {
+  try {
+    return new RegExp(src, flags)
+  } catch (e) {
+    if (throwErrorAt !== undefined) {
+      if (e instanceof SyntaxError) parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message);
+      throw e
+    }
+  }
+}
+
+var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u");
+
+pp$7.readRegexp = function() {
+  var this$1 = this;
+
+  var escaped, inClass, start = this.pos;
+  for (;;) {
+    if (this$1.pos >= this$1.input.length) this$1.raise(start, "Unterminated regular expression");
+    var ch = this$1.input.charAt(this$1.pos);
+    if (lineBreak.test(ch)) this$1.raise(start, "Unterminated regular expression");
+    if (!escaped) {
+      if (ch === "[") inClass = true;
+      else if (ch === "]" && inClass) inClass = false;
+      else if (ch === "/" && !inClass) break
+      escaped = ch === "\\";
+    } else escaped = false;
+    ++this$1.pos;
+  }
+  var content = this.input.slice(start, this.pos);
+  ++this.pos;
+  // Need to use `readWord1` because '\uXXXX' sequences are allowed
+  // here (don't ask).
+  var mods = this.readWord1();
+  var tmp = content, tmpFlags = "";
+  if (mods) {
+    var validFlags = /^[gim]*$/;
+    if (this.options.ecmaVersion >= 6) validFlags = /^[gimuy]*$/;
+    if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag");
+    if (mods.indexOf("u") >= 0) {
+      if (regexpUnicodeSupport) {
+        tmpFlags = "u";
+      } else {
+        // Replace each astral symbol and every Unicode escape sequence that
+        // possibly represents an astral symbol or a paired surrogate with a
+        // single ASCII symbol to avoid throwing on regular expressions that
+        // are only valid in combination with the `/u` flag.
+        // Note: replacing with the ASCII symbol `x` might cause false
+        // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a
+        // perfectly valid pattern that is equivalent to `[a-b]`, but it would
+        // be replaced by `[x-b]` which throws an error.
+        tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (_match, code, offset) {
+          code = Number("0x" + code);
+          if (code > 0x10FFFF) this$1.raise(start + offset + 3, "Code point out of bounds");
+          return "x"
+        });
+        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x");
+        tmpFlags = tmpFlags.replace("u", "");
+      }
+    }
+  }
+  // Detect invalid regular expressions.
+  var value = null;
+  // Rhino's regular expression parser is flaky and throws uncatchable exceptions,
+  // so don't do detection if we are running under Rhino
+  if (!isRhino) {
+    tryCreateRegexp(tmp, tmpFlags, start, this);
+    // Get a regular expression object for this pattern-flag pair, or `null` in
+    // case the current environment doesn't support the flags it uses.
+    value = tryCreateRegexp(content, mods);
+  }
+  return this.finishToken(types.regexp, {pattern: content, flags: mods, value: value})
+};
+
+// Read an integer in the given radix. Return null if zero digits
+// were read, the integer value otherwise. When `len` is given, this
+// will return `null` unless the integer has exactly `len` digits.
+
+pp$7.readInt = function(radix, len) {
+  var this$1 = this;
+
+  var start = this.pos, total = 0;
+  for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
+    var code = this$1.input.charCodeAt(this$1.pos), val;
+    if (code >= 97) val = code - 97 + 10; // a
+    else if (code >= 65) val = code - 65 + 10; // A
+    else if (code >= 48 && code <= 57) val = code - 48; // 0-9
+    else val = Infinity;
+    if (val >= radix) break
+    ++this$1.pos;
+    total = total * radix + val;
+  }
+  if (this.pos === start || len != null && this.pos - start !== len) return null
+
+  return total
+};
+
+pp$7.readRadixNumber = function(radix) {
+  this.pos += 2; // 0x
+  var val = this.readInt(radix);
+  if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix);
+  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number");
+  return this.finishToken(types.num, val)
+};
+
+// Read an integer, octal integer, or floating-point number.
+
+pp$7.readNumber = function(startsWithDot) {
+  var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48;
+  if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number");
+  if (octal && this.pos == start + 1) octal = false;
+  var next = this.input.charCodeAt(this.pos);
+  if (next === 46 && !octal) { // '.'
+    ++this.pos;
+    this.readInt(10);
+    isFloat = true;
+    next = this.input.charCodeAt(this.pos);
+  }
+  if ((next === 69 || next === 101) && !octal) { // 'eE'
+    next = this.input.charCodeAt(++this.pos);
+    if (next === 43 || next === 45) ++this.pos; // '+-'
+    if (this.readInt(10) === null) this.raise(start, "Invalid number");
+    isFloat = true;
+  }
+  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number");
+
+  var str = this.input.slice(start, this.pos), val;
+  if (isFloat) val = parseFloat(str);
+  else if (!octal || str.length === 1) val = parseInt(str, 10);
+  else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number");
+  else val = parseInt(str, 8);
+  return this.finishToken(types.num, val)
+};
+
+// Read a string value, interpreting backslash-escapes.
+
+pp$7.readCodePoint = function() {
+  var ch = this.input.charCodeAt(this.pos), code;
+
+  if (ch === 123) {
+    if (this.options.ecmaVersion < 6) this.unexpected();
+    var codePos = ++this.pos;
+    code = this.readHexChar(this.input.indexOf('}', this.pos) - this.pos);
+    ++this.pos;
+    if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds");
+  } else {
+    code = this.readHexChar(4);
+  }
+  return code
+};
+
+function codePointToString(code) {
+  // UTF-16 Decoding
+  if (code <= 0xFFFF) return String.fromCharCode(code)
+  code -= 0x10000;
+  return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
+}
+
+pp$7.readString = function(quote) {
+  var this$1 = this;
+
+  var out = "", chunkStart = ++this.pos;
+  for (;;) {
+    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated string constant");
+    var ch = this$1.input.charCodeAt(this$1.pos);
+    if (ch === quote) break
+    if (ch === 92) { // '\'
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(false);
+      chunkStart = this$1.pos;
+    } else {
+      if (isNewLine(ch)) this$1.raise(this$1.start, "Unterminated string constant");
+      ++this$1.pos;
+    }
+  }
+  out += this.input.slice(chunkStart, this.pos++);
+  return this.finishToken(types.string, out)
+};
+
+// Reads template string tokens.
+
+pp$7.readTmplToken = function() {
+  var this$1 = this;
+
+  var out = "", chunkStart = this.pos;
+  for (;;) {
+    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated template");
+    var ch = this$1.input.charCodeAt(this$1.pos);
+    if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${'
+      if (this$1.pos === this$1.start && this$1.type === types.template) {
+        if (ch === 36) {
+          this$1.pos += 2;
+          return this$1.finishToken(types.dollarBraceL)
+        } else {
+          ++this$1.pos;
+          return this$1.finishToken(types.backQuote)
+        }
+      }
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      return this$1.finishToken(types.template, out)
+    }
+    if (ch === 92) { // '\'
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(true);
+      chunkStart = this$1.pos;
+    } else if (isNewLine(ch)) {
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      ++this$1.pos;
+      switch (ch) {
+        case 13:
+          if (this$1.input.charCodeAt(this$1.pos) === 10) ++this$1.pos;
+        case 10:
+          out += "\n";
+          break
+        default:
+          out += String.fromCharCode(ch);
+          break
+      }
+      if (this$1.options.locations) {
+        ++this$1.curLine;
+        this$1.lineStart = this$1.pos;
+      }
+      chunkStart = this$1.pos;
+    } else {
+      ++this$1.pos;
+    }
+  }
+};
+
+// Used to read escaped characters
+
+pp$7.readEscapedChar = function(inTemplate) {
+  var ch = this.input.charCodeAt(++this.pos);
+  ++this.pos;
+  switch (ch) {
+  case 110: return "\n" // 'n' -> '\n'
+  case 114: return "\r" // 'r' -> '\r'
+  case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
+  case 117: return codePointToString(this.readCodePoint()) // 'u'
+  case 116: return "\t" // 't' -> '\t'
+  case 98: return "\b" // 'b' -> '\b'
+  case 118: return "\u000b" // 'v' -> '\u000b'
+  case 102: return "\f" // 'f' -> '\f'
+  case 13: if (this.input.charCodeAt(this.pos) === 10) ++this.pos; // '\r\n'
+  case 10: // ' \n'
+    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
+    return ""
+  default:
+    if (ch >= 48 && ch <= 55) {
+      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
+      var octal = parseInt(octalStr, 8);
+      if (octal > 255) {
+        octalStr = octalStr.slice(0, -1);
+        octal = parseInt(octalStr, 8);
+      }
+      if (octalStr !== "0" && (this.strict || inTemplate)) {
+        this.raise(this.pos - 2, "Octal literal in strict mode");
+      }
+      this.pos += octalStr.length - 1;
+      return String.fromCharCode(octal)
+    }
+    return String.fromCharCode(ch)
+  }
+};
+
+// Used to read character escape sequences ('\x', '\u', '\U').
+
+pp$7.readHexChar = function(len) {
+  var codePos = this.pos;
+  var n = this.readInt(16, len);
+  if (n === null) this.raise(codePos, "Bad character escape sequence");
+  return n
+};
+
+// Read an identifier, and return it as a string. Sets `this.containsEsc`
+// to whether the word contained a '\u' escape.
+//
+// Incrementally adds only escaped chars, adding other chunks as-is
+// as a micro-optimization.
+
+pp$7.readWord1 = function() {
+  var this$1 = this;
+
+  this.containsEsc = false;
+  var word = "", first = true, chunkStart = this.pos;
+  var astral = this.options.ecmaVersion >= 6;
+  while (this.pos < this.input.length) {
+    var ch = this$1.fullCharCodeAtPos();
+    if (isIdentifierChar(ch, astral)) {
+      this$1.pos += ch <= 0xffff ? 1 : 2;
+    } else if (ch === 92) { // "\"
+      this$1.containsEsc = true;
+      word += this$1.input.slice(chunkStart, this$1.pos);
+      var escStart = this$1.pos;
+      if (this$1.input.charCodeAt(++this$1.pos) != 117) // "u"
+        this$1.raise(this$1.pos, "Expecting Unicode escape sequence \\uXXXX");
+      ++this$1.pos;
+      var esc = this$1.readCodePoint();
+      if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
+        this$1.raise(escStart, "Invalid Unicode escape");
+      word += codePointToString(esc);
+      chunkStart = this$1.pos;
+    } else {
+      break
+    }
+    first = false;
+  }
+  return word + this.input.slice(chunkStart, this.pos)
+};
+
+// Read an identifier or keyword token. Will check for reserved
+// words when necessary.
+
+pp$7.readWord = function() {
+  var word = this.readWord1();
+  var type = types.name;
+  if ((this.options.ecmaVersion >= 6 || !this.containsEsc) && this.keywords.test(word))
+    type = keywords$1[word];
+  return this.finishToken(type, word)
+};
+
+// Acorn is a tiny, fast JavaScript parser written in JavaScript.
+//
+// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
+// various contributors and released under an MIT license.
+//
+// Git repositories for Acorn are available at
+//
+//     http://marijnhaverbeke.nl/git/acorn
+//     https://github.com/ternjs/acorn.git
+//
+// Please use the [github bug tracker][ghbt] to report issues.
+//
+// [ghbt]: https://github.com/ternjs/acorn/issues
+//
+// This file defines the main parser interface. The library also comes
+// with a [error-tolerant parser][dammit] and an
+// [abstract syntax tree walker][walk], defined in other files.
+//
+// [dammit]: acorn_loose.js
+// [walk]: util/walk.js
+
+
+
+// The main exported interface (under `self.acorn` when in the
+// browser) is a `parse` function that takes a code string and
+// returns an abstract syntax tree as specified by [Mozilla parser
+// API][api].
+//
+// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
+
+function parse(input, options) {
+  return new Parser(options, input).parse()
+}
+
+// This function tries to parse a single expression at a given
+// offset in a string. Useful for parsing mixed-language formats
+// that embed JavaScript expressions.
+
+
+
+// Acorn is organized as a tokenizer and a recursive-descent parser.
+// The `tokenizer` export provides an interface to the tokenizer.
+
+
+
+// This is a terrible kludge to support the existing, pre-ES6
+// interface where the loose parser module retroactively adds exports
+// to this module.
+
+function getLocator$1 ( source, options ) {
+	if ( options === void 0 ) options = {};
+
+	var offsetLine = options.offsetLine || 0;
+	var offsetColumn = options.offsetColumn || 0;
+
+	var originalLines = source.split( '\n' );
+
+	var start = 0;
+	var lineRanges = originalLines.map( function ( line, i ) {
+		var end = start + line.length + 1;
+		var range = { start: start, end: end, line: i };
+
+		start = end;
+		return range;
+	});
+
+	var i = 0;
+
+	function rangeContains ( range, index ) {
+		return range.start <= index && index < range.end;
+	}
+
+	function getLocation ( range, index ) {
+		return { line: offsetLine + range.line, column: offsetColumn + index - range.start, character: index };
+	}
+
+	return function locate ( search, startIndex ) {
+		if ( typeof search === 'string' ) {
+			search = source.indexOf( search, startIndex || 0 );
+		}
+
+		var range = lineRanges[i];
+
+		var d = search >= range.end ? 1 : -1;
+
+		while ( range ) {
+			if ( rangeContains( range, search ) ) return getLocation( range, search );
+
+			i += d;
+			range = lineRanges[i];
+		}
+	};
+}
+
+function locate ( source, search, options ) {
+	if ( typeof options === 'number' ) {
+		throw new Error( 'locate takes a { startIndex, offsetLine, offsetColumn } object as the third argument' );
+	}
+
+	return getLocator$1( source, options )( search, options && options.startIndex );
+}
+
+var reservedWords$1 = 'break case class catch const continue debugger default delete do else export extends finally for function if import in instanceof let new return super switch this throw try typeof var void while with yield enum await implements package protected static interface private public'.split( ' ' );
+var builtins = 'Infinity NaN undefined null true false eval uneval isFinite isNaN parseFloat parseInt decodeURI decodeURIComponent encodeURI encodeURIComponent escape unescape Object Function Boolean Symbol Error EvalError InternalError RangeError ReferenceError SyntaxError TypeError URIError Number Math Date String RegExp Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array Map Set WeakMap WeakSet SIMD ArrayBuffer DataView JSON Promise Generator GeneratorFunction Reflect Proxy Intl'.split( ' ' );
+
+var blacklisted = blank();
+reservedWords$1.concat( builtins ).forEach( function (word) { return blacklisted[ word ] = true; } );
+
+
+function makeLegalIdentifier ( str ) {
+	str = str
+		.replace( /-(\w)/g, function ( _, letter ) { return letter.toUpperCase(); } )
+		.replace( /[^$_a-zA-Z0-9]/g, '_' );
+
+	if ( /\d/.test( str[0] ) || blacklisted[ str ] ) str = "_" + str;
+
+	return str;
+}
+
+function spaces ( i ) {
+	var result = '';
+	while ( i-- ) result += ' ';
+	return result;
+}
+
+
+function tabsToSpaces ( str ) {
+	return str.replace( /^\t+/, function (match) { return match.split( '\t' ).join( '  ' ); } );
+}
+
+function getCodeFrame ( source, line, column ) {
+	var lines = source.split( '\n' );
+
+	var frameStart = Math.max( 0, line - 3 );
+	var frameEnd = Math.min( line + 2, lines.length );
+
+	lines = lines.slice( frameStart, frameEnd );
+	while ( !/\S/.test( lines[ lines.length - 1 ] ) ) {
+		lines.pop();
+		frameEnd -= 1;
+	}
+
+	var digits = String( frameEnd ).length;
+
+	return lines
+		.map( function ( str, i ) {
+			var isErrorLine = frameStart + i + 1 === line;
+
+			var lineNum = String( i + frameStart + 1 );
+			while ( lineNum.length < digits ) lineNum = " " + lineNum;
+
+			if ( isErrorLine ) {
+				var indicator = spaces( digits + 2 + tabsToSpaces( str.slice( 0, column ) ).length ) + '^';
+				return (lineNum + ": " + (tabsToSpaces( str )) + "\n" + indicator);
+			}
+
+			return (lineNum + ": " + (tabsToSpaces( str )));
+		})
+		.join( '\n' );
+}
+
+function relativeId ( id ) {
+	if ( typeof process === 'undefined' || !isAbsolute( id ) ) return id;
+	return relative( process.cwd(), id );
+}
+
+// properties are for debugging purposes only
+var ARRAY    = { ARRAY:    true, toString: function () { return '[[ARRAY]]'; } };
+
+
+var NUMBER   = { NUMBER:   true, toString: function () { return '[[NUMBER]]'; } };
+var OBJECT   = { OBJECT:   true, toString: function () { return '[[OBJECT]]'; } };
+var STRING   = { STRING:   true, toString: function () { return '[[STRING]]'; } };
+var UNKNOWN  = { UNKNOWN:  true, toString: function () { return '[[UNKNOWN]]'; } };
+
+var Declaration = function Declaration ( node, isParam ) {
+	this.node = node;
+
+	this.name = node.id ? node.id.name : node.name;
+	this.exportName = null;
+	this.isParam = isParam;
+
+	this.isReassigned = false;
+};
+
+Declaration.prototype.activate = function activate () {
+	if ( this.activated ) return;
+	this.activated = true;
+
+	if ( this.isParam ) return;
+	this.node.activate();
+};
+
+Declaration.prototype.addReference = function addReference ( reference ) {
+	reference.declaration = this;
+
+	if ( reference.name !== this.name ) {
+		this.name = makeLegalIdentifier( reference.name ); // TODO handle differences of opinion
+	}
+
+	if ( reference.isReassignment ) this.isReassigned = true;
+};
+
+Declaration.prototype.render = function render ( es ) {
+	if ( es ) return this.name;
+	if ( !this.isReassigned || !this.exportName ) return this.name;
+
+	return ("exports." + (this.exportName));
+};
+
+var SyntheticNamespaceDeclaration = function SyntheticNamespaceDeclaration ( module ) {
+	var this$1 = this;
+
+	this.isNamespace = true;
+	this.module = module;
+	this.name = module.basename();
+
+	this.needsNamespaceBlock = false;
+
+	this.originals = blank();
+	module.getExports().forEach( function (name) {
+		this$1.originals[ name ] = module.traceExport( name );
+	});
+};
+
+SyntheticNamespaceDeclaration.prototype.activate = function activate () {
+	this.needsNamespaceBlock = true;
+
+	// add synthetic references, in case of chained
+	// namespace imports
+	forOwn( this.originals, function (original) {
+		original.activate();
+	});
+};
+
+SyntheticNamespaceDeclaration.prototype.addReference = function addReference ( node ) {
+	this.name = node.name;
+};
+
+SyntheticNamespaceDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	values.add( UNKNOWN );
+};
+
+SyntheticNamespaceDeclaration.prototype.getName = function getName () {
+	return this.name;
+};
+
+SyntheticNamespaceDeclaration.prototype.renderBlock = function renderBlock ( es, legacy, indentString ) {
+		var this$1 = this;
+
+	var members = keys( this.originals ).map( function (name) {
+		var original = this$1.originals[ name ];
+
+		if ( original.isReassigned && !legacy ) {
+			return (indentString + "get " + name + " () { return " + (original.getName( es )) + "; }");
+		}
+
+		if ( legacy && ~reservedWords$1.indexOf( name ) ) name = "'" + name + "'";
+		return ("" + indentString + name + ": " + (original.getName( es )));
+	});
+
+	var callee = legacy ? "(Object.freeze || Object)" : "Object.freeze";
+	return ((this.module.bundle.varOrConst) + " " + (this.getName( es )) + " = " + callee + "({\n" + (members.join( ',\n' )) + "\n});\n\n");
+};
+
+var ExternalDeclaration = function ExternalDeclaration ( module, name ) {
+	this.module = module;
+	this.name = name;
+	this.safeName = null;
+	this.isExternal = true;
+
+	this.activated = false;
+
+	this.isNamespace = name === '*';
+};
+
+ExternalDeclaration.prototype.activate = function activate () {
+	this.activated = true;
+};
+
+ExternalDeclaration.prototype.addReference = function addReference ( reference ) {
+	reference.declaration = this;
+
+	if ( this.name === 'default' || this.name === '*' ) {
+		this.module.suggestName( reference.name );
+	}
+};
+
+ExternalDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	values.add( UNKNOWN );
+};
+
+ExternalDeclaration.prototype.getName = function getName ( es ) {
+	if ( this.name === '*' ) {
+		return this.module.name;
+	}
+
+	if ( this.name === 'default' ) {
+		return this.module.exportsNamespace || ( !es && this.module.exportsNames ) ?
+			((this.module.name) + "__default") :
+			this.module.name;
+	}
+
+	return es ? this.safeName : ((this.module.name) + "." + (this.name));
+};
+
+ExternalDeclaration.prototype.setSafeName = function setSafeName ( name ) {
+	this.safeName = name;
+};
+
+function extractNames ( param ) {
+	var names = [];
+	extractors[ param.type ]( names, param );
+	return names;
+}
+
+var extractors = {
+	Identifier: function Identifier ( names, param ) {
+		names.push( param.name );
+	},
+
+	ObjectPattern: function ObjectPattern ( names, param ) {
+		param.properties.forEach( function (prop) {
+			extractors[ prop.value.type ]( names, prop.value );
+		});
+	},
+
+	ArrayPattern: function ArrayPattern ( names, param ) {
+		param.elements.forEach( function (element) {
+			if ( element ) extractors[ element.type ]( names, element );
+		});
+	},
+
+	RestElement: function RestElement ( names, param ) {
+		extractors[ param.argument.type ]( names, param.argument );
+	},
+
+	AssignmentPattern: function AssignmentPattern ( names, param ) {
+		extractors[ param.left.type ]( names, param.left );
+	}
+};
+
+var Node$1 = function Node () {};
+
+Node$1.prototype.bind = function bind ( scope ) {
+		var this$1 = this;
+
+	this.eachChild( function (child) { return child.bind( this$1.scope || scope ); } );
+};
+
+Node$1.prototype.eachChild = function eachChild ( callback ) {
+		var this$1 = this;
+
+	for ( var key of this.keys ) {
+		if ( this$1.shorthand && key === 'key' ) continue; // key and value are the same
+
+		var value = this$1[ key ];
+
+		if ( value ) {
+			if ( 'length' in value ) {
+				for ( var child of value ) {
+					if ( child ) callback( child );
+				}
+			} else if ( value ) {
+				callback( value );
+			}
+		}
+	}
+};
+
+Node$1.prototype.findParent = function findParent ( selector ) {
+	return selector.test( this.type ) ? this : this.parent.findParent( selector );
+};
+
+// TODO abolish findScope. if a node needs to store scope, store it
+Node$1.prototype.findScope = function findScope ( functionScope ) {
+	return this.parent.findScope( functionScope );
+};
+
+Node$1.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	//this.eachChild( child => child.gatherPossibleValues( values ) );
+	values.add( UNKNOWN );
+};
+
+Node$1.prototype.getValue = function getValue () {
+	return UNKNOWN;
+};
+
+Node$1.prototype.hasEffects = function hasEffects ( scope ) {
+		var this$1 = this;
+
+	if ( this.scope ) scope = this.scope;
+
+	for ( var key of this.keys ) {
+		var value = this$1[ key ];
+
+		if ( value ) {
+			if ( 'length' in value ) {
+				for ( var child of value ) {
+					if ( child && child.hasEffects( scope ) ) {
+						return true;
+					}
+				}
+			} else if ( value && value.hasEffects( scope ) ) {
+				return true;
+			}
+		}
+	}
+};
+
+Node$1.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+	this.eachChild( function (child) { return child.initialise( this$1.scope || scope ); } );
+};
+
+Node$1.prototype.insertSemicolon = function insertSemicolon ( code ) {
+	if ( code.original[ this.end - 1 ] !== ';' ) {
+		code.insertLeft( this.end, ';' );
+	}
+};
+
+Node$1.prototype.locate = function locate$1 () {
+	// useful for debugging
+	var location = locate( this.module.code, this.start, { offsetLine: 1 });
+	location.file = this.module.id;
+	location.toString = function () { return JSON.stringify( location ); };
+
+	return location;
+};
+
+Node$1.prototype.render = function render ( code, es ) {
+	this.eachChild( function (child) { return child.render( code, es ); } );
+};
+
+Node$1.prototype.run = function run ( scope ) {
+		var this$1 = this;
+
+	if ( this.ran ) return;
+	this.ran = true;
+
+	this.eachChild( function (child) {
+		child.run( this$1.scope || scope );
+	});
+};
+
+Node$1.prototype.toString = function toString () {
+	return this.module.code.slice( this.start, this.end );
+};
+
+var ArrayExpression = (function (Node) {
+	function ArrayExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ArrayExpression.__proto__ = Node;
+	ArrayExpression.prototype = Object.create( Node && Node.prototype );
+	ArrayExpression.prototype.constructor = ArrayExpression;
+
+	ArrayExpression.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( ARRAY );
+	};
+
+	return ArrayExpression;
+}(Node$1));
+
+var Parameter = function Parameter ( name ) {
+	this.name = name;
+
+	this.isParam = true;
+	this.activated = true;
+};
+
+Parameter.prototype.activate = function activate () {
+	// noop
+};
+
+Parameter.prototype.addReference = function addReference () {
+	// noop?
+};
+
+Parameter.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	values.add( UNKNOWN ); // TODO populate this at call time
+};
+
+Parameter.prototype.getName = function getName () {
+	return this.name;
+};
+
+var Scope = function Scope ( options ) {
+	if ( options === void 0 ) options = {};
+
+	this.parent = options.parent;
+	this.isBlockScope = !!options.isBlockScope;
+	this.isLexicalBoundary = !!options.isLexicalBoundary;
+	this.isModuleScope = !!options.isModuleScope;
+
+	this.children = [];
+	if ( this.parent ) this.parent.children.push( this );
+
+	this.declarations = blank();
+
+	if ( this.isLexicalBoundary && !this.isModuleScope ) {
+		this.declarations.arguments = new Parameter( 'arguments' );
+	}
+};
+
+Scope.prototype.addDeclaration = function addDeclaration ( name, declaration, isVar, isParam ) {
+	if ( isVar && this.isBlockScope ) {
+		this.parent.addDeclaration( name, declaration, isVar, isParam );
+	} else {
+		var existingDeclaration = this.declarations[ name ];
+
+		if ( existingDeclaration && existingDeclaration.duplicates ) {
+			// TODO warn/throw on duplicates?
+			existingDeclaration.duplicates.push( declaration );
+		} else {
+			this.declarations[ name ] = isParam ? new Parameter( name ) : declaration;
+		}
+	}
+};
+
+Scope.prototype.contains = function contains ( name ) {
+	return !!this.declarations[ name ] ||
+		       ( this.parent ? this.parent.contains( name ) : false );
+};
+
+Scope.prototype.deshadow = function deshadow ( names ) {
+		var this$1 = this;
+
+	keys( this.declarations ).forEach( function (key) {
+		var declaration = this$1.declarations[ key ];
+
+		// we can disregard exports.foo etc
+		if ( declaration.exportName && declaration.isReassigned ) return;
+
+		var name = declaration.getName( true );
+		var deshadowed = name;
+
+		var i = 1;
+
+		while ( names.has( deshadowed ) ) {
+			deshadowed = name + "$$" + (i++);
+		}
+
+		declaration.name = deshadowed;
+	});
+
+	this.children.forEach( function (scope) { return scope.deshadow( names ); } );
+};
+
+Scope.prototype.findDeclaration = function findDeclaration ( name ) {
+	return this.declarations[ name ] ||
+		       ( this.parent && this.parent.findDeclaration( name ) );
+};
+
+Scope.prototype.findLexicalBoundary = function findLexicalBoundary () {
+	return this.isLexicalBoundary ? this : this.parent.findLexicalBoundary();
+};
+
+var ArrowFunctionExpression = (function (Node) {
+	function ArrowFunctionExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ArrowFunctionExpression.__proto__ = Node;
+	ArrowFunctionExpression.prototype = Object.create( Node && Node.prototype );
+	ArrowFunctionExpression.prototype.constructor = ArrowFunctionExpression;
+
+	ArrowFunctionExpression.prototype.bind = function bind ( scope ) {
+		Node.prototype.bind.call( this, this.scope || scope );
+	};
+
+	ArrowFunctionExpression.prototype.findScope = function findScope ( functionScope ) {
+		return this.scope || this.parent.findScope( functionScope );
+	};
+
+	ArrowFunctionExpression.prototype.hasEffects = function hasEffects () {
+		return false;
+	};
+
+	ArrowFunctionExpression.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+		if ( this.body.type === 'BlockStatement' ) {
+			this.body.createScope( scope );
+			this.scope = this.body.scope;
+		} else {
+			this.scope = new Scope({
+				parent: scope,
+				isBlockScope: false,
+				isLexicalBoundary: false
+			});
+
+			for ( var param of this.params ) {
+				for ( var name of extractNames( param ) ) {
+					this$1.scope.addDeclaration( name, null, null, true ); // TODO ugh
+				}
+			}
+		}
+
+		Node.prototype.initialise.call( this, this.scope );
+	};
+
+	return ArrowFunctionExpression;
+}(Node$1));
+
+// TODO tidy this up a bit (e.g. they can both use node.module.imports)
+function disallowIllegalReassignment ( scope, node ) {
+	if ( node.type === 'MemberExpression' && node.object.type === 'Identifier' ) {
+		var declaration = scope.findDeclaration( node.object.name );
+		if ( declaration.isNamespace ) {
+			node.module.error({
+				code: 'ILLEGAL_NAMESPACE_REASSIGNMENT',
+				message: ("Illegal reassignment to import '" + (node.object.name) + "'")
+			}, node.start );
+		}
+	}
+
+	else if ( node.type === 'Identifier' ) {
+		if ( node.module.imports[ node.name ] && !scope.contains( node.name ) ) {
+			node.module.error({
+				code: 'ILLEGAL_REASSIGNMENT',
+				message: ("Illegal reassignment to import '" + (node.name) + "'")
+			}, node.start );
+		}
+	}
+}
+
+function isUsedByBundle ( scope, node ) {
+	// const expression = node;
+	while ( node.type === 'MemberExpression' ) node = node.object;
+
+	var declaration = scope.findDeclaration( node.name );
+
+	if ( declaration.isParam ) {
+		return true;
+
+		// TODO if we mutate a parameter, assume the worst
+		// return node !== expression;
+	}
+
+	if ( declaration.activated ) return true;
+
+	var values = new Set();
+	declaration.gatherPossibleValues( values );
+	for ( var value of values ) {
+		if ( value === UNKNOWN ) {
+			return true;
+		}
+
+		if ( value.type === 'Identifier' ) {
+			if ( value.declaration.activated ) {
+				return true;
+			}
+			value.declaration.gatherPossibleValues( values );
+		}
+
+		else if ( value.gatherPossibleValues ) {
+			value.gatherPossibleValues( values );
+		}
+	}
+
+	return false;
+}
+
+function isProgramLevel ( node ) {
+	do {
+		if ( node.type === 'Program' ) {
+			return true;
+		}
+		node = node.parent;
+	} while ( node && !/Function/.test( node.type ) );
+
+	return false;
+}
+
+var AssignmentExpression = (function (Node) {
+	function AssignmentExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) AssignmentExpression.__proto__ = Node;
+	AssignmentExpression.prototype = Object.create( Node && Node.prototype );
+	AssignmentExpression.prototype.constructor = AssignmentExpression;
+
+	AssignmentExpression.prototype.bind = function bind ( scope ) {
+		var subject = this.left;
+
+		this.subject = subject;
+		disallowIllegalReassignment( scope, subject );
+
+		if ( subject.type === 'Identifier' ) {
+			var declaration = scope.findDeclaration( subject.name );
+			declaration.isReassigned = true;
+
+			if ( declaration.possibleValues ) { // TODO this feels hacky
+				if ( this.operator === '=' ) {
+					declaration.possibleValues.add( this.right );
+				} else if ( this.operator === '+=' ) {
+					declaration.possibleValues.add( STRING ).add( NUMBER );
+				} else {
+					declaration.possibleValues.add( NUMBER );
+				}
+			}
+		}
+
+		Node.prototype.bind.call( this, scope );
+	};
+
+	AssignmentExpression.prototype.hasEffects = function hasEffects ( scope ) {
+		var hasEffects = this.isUsedByBundle() || this.right.hasEffects( scope );
+		return hasEffects;
+	};
+
+	AssignmentExpression.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+
+		if ( isProgramLevel( this ) ) {
+			this.module.bundle.dependentExpressions.push( this );
+		}
+
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	AssignmentExpression.prototype.isUsedByBundle = function isUsedByBundle$1 () {
+		return isUsedByBundle( this.scope, this.subject );
+	};
+
+	return AssignmentExpression;
+}(Node$1));
+
+var operators = {
+	'==': function ( left, right ) { return left == right; },
+	'!=': function ( left, right ) { return left != right; },
+	'===': function ( left, right ) { return left === right; },
+	'!==': function ( left, right ) { return left !== right; },
+	'<': function ( left, right ) { return left < right; },
+	'<=': function ( left, right ) { return left <= right; },
+	'>': function ( left, right ) { return left > right; },
+	'>=': function ( left, right ) { return left >= right; },
+	'<<': function ( left, right ) { return left << right; },
+	'>>': function ( left, right ) { return left >> right; },
+	'>>>': function ( left, right ) { return left >>> right; },
+	'+': function ( left, right ) { return left + right; },
+	'-': function ( left, right ) { return left - right; },
+	'*': function ( left, right ) { return left * right; },
+	'/': function ( left, right ) { return left / right; },
+	'%': function ( left, right ) { return left % right; },
+	'|': function ( left, right ) { return left | right; },
+	'^': function ( left, right ) { return left ^ right; },
+	'&': function ( left, right ) { return left & right; },
+	in: function ( left, right ) { return left in right; },
+	instanceof: function ( left, right ) { return left instanceof right; }
+};
+
+var BinaryExpression = (function (Node) {
+	function BinaryExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) BinaryExpression.__proto__ = Node;
+	BinaryExpression.prototype = Object.create( Node && Node.prototype );
+	BinaryExpression.prototype.constructor = BinaryExpression;
+
+	BinaryExpression.prototype.getValue = function getValue () {
+		var leftValue = this.left.getValue();
+		if ( leftValue === UNKNOWN ) return UNKNOWN;
+
+		var rightValue = this.right.getValue();
+		if ( rightValue === UNKNOWN ) return UNKNOWN;
+
+		return operators[ this.operator ]( leftValue, rightValue );
+	};
+
+	return BinaryExpression;
+}(Node$1));
+
+var Statement = (function (Node) {
+	function Statement () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) Statement.__proto__ = Node;
+	Statement.prototype = Object.create( Node && Node.prototype );
+	Statement.prototype.constructor = Statement;
+
+	Statement.prototype.render = function render ( code, es ) {
+		if ( !this.module.bundle.treeshake || this.shouldInclude ) {
+			Node.prototype.render.call( this, code, es );
+		} else {
+			code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+		}
+	};
+
+	Statement.prototype.run = function run ( scope ) {
+		this.shouldInclude = true;
+		Node.prototype.run.call( this, scope );
+	};
+
+	return Statement;
+}(Node$1));
+
+var BlockStatement = (function (Statement$$1) {
+	function BlockStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) BlockStatement.__proto__ = Statement$$1;
+	BlockStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	BlockStatement.prototype.constructor = BlockStatement;
+
+	BlockStatement.prototype.bind = function bind () {
+		var this$1 = this;
+
+		for ( var node of this.body ) {
+			node.bind( this$1.scope );
+		}
+	};
+
+	BlockStatement.prototype.createScope = function createScope ( parent ) {
+		var this$1 = this;
+
+		this.parentIsFunction = /Function/.test( this.parent.type );
+		this.isFunctionBlock = this.parentIsFunction || this.parent.type === 'Module';
+
+		this.scope = new Scope({
+			parent: parent,
+			isBlockScope: !this.isFunctionBlock,
+			isLexicalBoundary: this.isFunctionBlock && this.parent.type !== 'ArrowFunctionExpression',
+			owner: this // TODO is this used anywhere?
+		});
+
+		var params = this.parent.params || ( this.parent.type === 'CatchClause' && [ this.parent.param ] );
+
+		if ( params && params.length ) {
+			params.forEach( function (node) {
+				extractNames( node ).forEach( function (name) {
+					this$1.scope.addDeclaration( name, node, false, true );
+				});
+			});
+		}
+	};
+
+	BlockStatement.prototype.findScope = function findScope ( functionScope ) {
+		return functionScope && !this.isFunctionBlock ? this.parent.findScope( functionScope ) : this.scope;
+	};
+
+	BlockStatement.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+		if ( !this.scope ) this.createScope( scope ); // scope can be created early in some cases, e.g for (let i... )
+
+		var lastNode;
+		for ( var node of this.body ) {
+			node.initialise( this$1.scope );
+
+			if ( lastNode ) lastNode.next = node.start;
+			lastNode = node;
+		}
+	};
+
+	BlockStatement.prototype.render = function render ( code, es ) {
+		if (this.body.length) {
+			for ( var node of this.body ) {
+				node.render( code, es );
+			}
+		} else {
+			Statement$$1.prototype.render.call(this, code, es);
+		}
+	};
+
+	return BlockStatement;
+}(Statement));
+
+function isReference ( node, parent ) {
+	if ( node.type === 'MemberExpression' ) {
+		return !node.computed && isReference( node.object, node );
+	}
+
+	if ( node.type === 'Identifier' ) {
+		// the only time we could have an identifier node without a parent is
+		// if it's the entire body of a function without a block statement –
+		// i.e. an arrow function expression like `a => a`
+		if ( !parent ) return true;
+
+		// TODO is this right?
+		if ( parent.type === 'MemberExpression' || parent.type === 'MethodDefinition' ) {
+			return parent.computed || node === parent.object;
+		}
+
+		// disregard the `bar` in `{ bar: foo }`, but keep it in `{ [bar]: foo }`
+		if ( parent.type === 'Property' ) return parent.computed || node === parent.value;
+
+		// disregard the `bar` in `class Foo { bar () {...} }`
+		if ( parent.type === 'MethodDefinition' ) return false;
+
+		// disregard the `bar` in `export { foo as bar }`
+		if ( parent.type === 'ExportSpecifier' && node !== parent.local ) return;
+
+		return true;
+	}
+}
+
+function flatten ( node ) {
+	var parts = [];
+	while ( node.type === 'MemberExpression' ) {
+		if ( node.computed ) return null;
+		parts.unshift( node.property.name );
+
+		node = node.object;
+	}
+
+	if ( node.type !== 'Identifier' ) return null;
+
+	var name = node.name;
+	parts.unshift( name );
+
+	return { name: name, keypath: parts.join( '.' ) };
+}
+
+var pureFunctions = {};
+
+var arrayTypes = 'Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array'.split( ' ' );
+var simdTypes = 'Int8x16 Int16x8 Int32x4 Float32x4 Float64x2'.split( ' ' );
+var simdMethods = 'abs add and bool check div equal extractLane fromFloat32x4 fromFloat32x4Bits fromFloat64x2 fromFloat64x2Bits fromInt16x8Bits fromInt32x4 fromInt32x4Bits fromInt8x16Bits greaterThan greaterThanOrEqual lessThan lessThanOrEqual load max maxNum min minNum mul neg not notEqual or reciprocalApproximation reciprocalSqrtApproximation replaceLane select selectBits shiftLeftByScalar shiftRightArithmeticByScalar shiftRightLogicalByScalar shuffle splat sqrt store sub swizzle xor'.split( ' ' );
+var allSimdMethods = [];
+simdTypes.forEach( function (t) {
+	simdMethods.forEach( function (m) {
+		allSimdMethods.push( ("SIMD." + t + "." + m) );
+	});
+});
+
+[
+	'Array.isArray',
+	'Error', 'EvalError', 'InternalError', 'RangeError', 'ReferenceError', 'SyntaxError', 'TypeError', 'URIError',
+	'isFinite', 'isNaN', 'parseFloat', 'parseInt', 'decodeURI', 'decodeURIComponent', 'encodeURI', 'encodeURIComponent', 'escape', 'unescape',
+	'Object', 'Object.create', 'Object.getNotifier', 'Object.getOwn', 'Object.getOwnPropertyDescriptor', 'Object.getOwnPropertyNames', 'Object.getOwnPropertySymbols', 'Object.getPrototypeOf', 'Object.is', 'Object.isExtensible', 'Object.isFrozen', 'Object.isSealed', 'Object.keys',
+	'Function', 'Boolean',
+	'Number', 'Number.isFinite', 'Number.isInteger', 'Number.isNaN', 'Number.isSafeInteger', 'Number.parseFloat', 'Number.parseInt',
+	'Symbol', 'Symbol.for', 'Symbol.keyFor',
+	'Math.abs', 'Math.acos', 'Math.acosh', 'Math.asin', 'Math.asinh', 'Math.atan', 'Math.atan2', 'Math.atanh', 'Math.cbrt', 'Math.ceil', 'Math.clz32', 'Math.cos', 'Math.cosh', 'Math.exp', 'Math.expm1', 'Math.floor', 'Math.fround', 'Math.hypot', 'Math.imul', 'Math.log', 'Math.log10', 'Math.log1p', 'Math.log2', 'Math.max', 'Math.min', 'Math.pow', 'Math.random', 'Math.round', 'Math.sign', 'Math.sin', 'Math.sinh', 'Math.sqrt', 'Math.tan', 'Math.tanh', 'Math.trunc',
+	'Date', 'Date.UTC', 'Date.now', 'Date.parse',
+	'String', 'String.fromCharCode', 'String.fromCodePoint', 'String.raw',
+	'RegExp',
+	'Map', 'Set', 'WeakMap', 'WeakSet',
+	'ArrayBuffer', 'ArrayBuffer.isView',
+	'DataView',
+	'JSON.parse', 'JSON.stringify',
+	'Promise', 'Promise.all', 'Promise.race', 'Promise.reject', 'Promise.resolve',
+	'Intl.Collator', 'Intl.Collator.supportedLocalesOf', 'Intl.DateTimeFormat', 'Intl.DateTimeFormat.supportedLocalesOf', 'Intl.NumberFormat', 'Intl.NumberFormat.supportedLocalesOf'
+
+	// TODO properties of e.g. window...
+].concat(
+	arrayTypes,
+	arrayTypes.map( function (t) { return (t + ".from"); } ),
+	arrayTypes.map( function (t) { return (t + ".of"); } ),
+	simdTypes.map( function (t) { return ("SIMD." + t); } ),
+	allSimdMethods
+).forEach( function (name) { return pureFunctions[ name ] = true; } );
+
+var currentlyCalling = new Set();
+
+function isES5Function ( node ) {
+	return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration';
+}
+
+function hasEffectsNew ( node, scope ) {
+	var inner = node;
+
+	if ( inner.type === 'ExpressionStatement' ) {
+		inner = inner.expression;
+
+		if ( inner.type === 'AssignmentExpression' ) {
+			if ( inner.right.hasEffects( scope ) ) {
+				return true;
+
+			} else {
+				inner = inner.left;
+
+				if ( inner.type === 'MemberExpression' ) {
+					if ( inner.computed && inner.property.hasEffects( scope ) ) {
+						return true;
+
+					} else {
+						inner = inner.object;
+
+						if ( inner.type === 'ThisExpression' ) {
+							return false;
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return node.hasEffects( scope );
+}
+
+function fnHasEffects ( fn, isNew ) {
+	if ( currentlyCalling.has( fn ) ) return false; // prevent infinite loops... TODO there must be a better way
+	currentlyCalling.add( fn );
+
+	// handle body-less arrow functions
+	var scope = fn.body.scope || fn.scope;
+	var body = fn.body.type === 'BlockStatement' ? fn.body.body : [ fn.body ];
+
+	for ( var node of body ) {
+		if ( isNew ? hasEffectsNew( node, scope ) : node.hasEffects( scope ) ) {
+			currentlyCalling.delete( fn );
+			return true;
+		}
+	}
+
+	currentlyCalling.delete( fn );
+	return false;
+}
+
+function callHasEffects ( scope, callee, isNew ) {
+	var values = new Set([ callee ]);
+
+	for ( var node of values ) {
+		if ( node === UNKNOWN ) return true; // err on side of caution
+
+		if ( /Function/.test( node.type ) ) {
+			if ( fnHasEffects( node, isNew && isES5Function( node ) ) ) return true;
+		}
+
+		else if ( isReference( node ) ) {
+			var flattened = flatten( node );
+			var declaration = scope.findDeclaration( flattened.name );
+
+			if ( declaration.isGlobal ) {
+				if ( !pureFunctions[ flattened.keypath ] ) return true;
+			}
+
+			else if ( declaration.isExternal ) {
+				return true; // TODO make this configurable? e.g. `path.[whatever]`
+			}
+
+			else {
+				if ( node.declaration ) {
+					node.declaration.gatherPossibleValues( values );
+				} else {
+					return true;
+				}
+			}
+		}
+
+		else {
+			if ( !node.gatherPossibleValues ) {
+				throw new Error( 'TODO' );
+			}
+			node.gatherPossibleValues( values );
+		}
+	}
+
+	return false;
+}
+
+var CallExpression = (function (Node) {
+	function CallExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) CallExpression.__proto__ = Node;
+	CallExpression.prototype = Object.create( Node && Node.prototype );
+	CallExpression.prototype.constructor = CallExpression;
+
+	CallExpression.prototype.bind = function bind ( scope ) {
+		if ( this.callee.type === 'Identifier' ) {
+			var declaration = scope.findDeclaration( this.callee.name );
+
+			if ( declaration.isNamespace ) {
+				this.module.error({
+					code: 'CANNOT_CALL_NAMESPACE',
+					message: ("Cannot call a namespace ('" + (this.callee.name) + "')")
+				}, this.start );
+			}
+
+			if ( this.callee.name === 'eval' && declaration.isGlobal ) {
+				this.module.warn({
+					code: 'EVAL',
+					message: "Use of eval is strongly discouraged, as it poses security risks and may cause issues with minification",
+					url: 'https://github.com/rollup/rollup/wiki/Troubleshooting#avoiding-eval'
+				}, this.start );
+			}
+		}
+
+		Node.prototype.bind.call( this, scope );
+	};
+
+	CallExpression.prototype.hasEffects = function hasEffects ( scope ) {
+		return callHasEffects( scope, this.callee, false );
+	};
+
+	CallExpression.prototype.initialise = function initialise ( scope ) {
+		if ( isProgramLevel( this ) ) {
+			this.module.bundle.dependentExpressions.push( this );
+		}
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	CallExpression.prototype.isUsedByBundle = function isUsedByBundle () {
+		return this.hasEffects( this.findScope() );
+	};
+
+	return CallExpression;
+}(Node$1));
+
+// TODO is this basically identical to FunctionDeclaration?
+var ClassDeclaration = (function (Node) {
+	function ClassDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ClassDeclaration.__proto__ = Node;
+	ClassDeclaration.prototype = Object.create( Node && Node.prototype );
+	ClassDeclaration.prototype.constructor = ClassDeclaration;
+
+	ClassDeclaration.prototype.activate = function activate () {
+		if ( this.activated ) return;
+		this.activated = true;
+
+		if ( this.superClass ) this.superClass.run( this.scope );
+		this.body.run();
+	};
+
+	ClassDeclaration.prototype.addReference = function addReference () {
+		/* noop? */
+	};
+
+	ClassDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( this );
+	};
+
+	ClassDeclaration.prototype.getName = function getName () {
+		return this.name;
+	};
+
+	ClassDeclaration.prototype.hasEffects = function hasEffects () {
+		return false;
+	};
+
+	ClassDeclaration.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+
+		this.name = this.id.name;
+
+		scope.addDeclaration( this.name, this, false, false );
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	ClassDeclaration.prototype.render = function render ( code, es ) {
+		if ( this.activated ) {
+			Node.prototype.render.call( this, code, es );
+		} else {
+			code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+		}
+	};
+
+	ClassDeclaration.prototype.run = function run ( scope ) {
+		if ( this.parent.type === 'ExportDefaultDeclaration' ) {
+			Node.prototype.run.call( this, scope );
+		}
+	};
+
+	return ClassDeclaration;
+}(Node$1));
+
+var ClassExpression = (function (Node) {
+	function ClassExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ClassExpression.__proto__ = Node;
+	ClassExpression.prototype = Object.create( Node && Node.prototype );
+	ClassExpression.prototype.constructor = ClassExpression;
+
+	ClassExpression.prototype.bind = function bind () {
+		Node.prototype.bind.call( this, this.scope );
+	};
+
+	ClassExpression.prototype.findScope = function findScope () {
+		return this.scope;
+	};
+
+	ClassExpression.prototype.initialise = function initialise () {
+		this.scope = new Scope({
+			isBlockScope: true,
+			parent: this.parent.findScope( false )
+		});
+
+		if ( this.id ) {
+			// function expression IDs belong to the child scope...
+			this.scope.addDeclaration( this.id.name, this, false, true );
+		}
+
+		Node.prototype.initialise.call( this, this.scope );
+	};
+
+	return ClassExpression;
+}(Node$1));
+
+var ConditionalExpression = (function (Node) {
+	function ConditionalExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ConditionalExpression.__proto__ = Node;
+	ConditionalExpression.prototype = Object.create( Node && Node.prototype );
+	ConditionalExpression.prototype.constructor = ConditionalExpression;
+
+	ConditionalExpression.prototype.initialise = function initialise ( scope ) {
+		if ( this.module.bundle.treeshake ) {
+			this.testValue = this.test.getValue();
+
+			if ( this.testValue === UNKNOWN	 ) {
+				Node.prototype.initialise.call( this, scope );
+			}
+
+			else if ( this.testValue ) {
+				this.consequent.initialise( scope );
+				this.alternate = null;
+			} else if ( this.alternate ) {
+				this.alternate.initialise( scope );
+				this.consequent = null;
+			}
+		}
+
+		else {
+			Node.prototype.initialise.call( this, scope );
+		}
+	};
+
+	ConditionalExpression.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		var testValue = this.test.getValue();
+
+		if ( testValue === UNKNOWN ) {
+			values.add( this.consequent ).add( this.alternate );
+		} else {
+			values.add( testValue ? this.consequent : this.alternate );
+		}
+	};
+
+	ConditionalExpression.prototype.getValue = function getValue () {
+		var testValue = this.test.getValue();
+		if ( testValue === UNKNOWN ) return UNKNOWN;
+
+		return testValue ? this.consequent.getValue() : this.alternate.getValue();
+	};
+
+	ConditionalExpression.prototype.render = function render ( code, es ) {
+		if ( !this.module.bundle.treeshake ) {
+			Node.prototype.render.call( this, code, es );
+		}
+
+		else {
+			if ( this.testValue === UNKNOWN ) {
+				Node.prototype.render.call( this, code, es );
+			}
+
+			else if ( this.testValue ) {
+				code.remove( this.start, this.consequent.start );
+				code.remove( this.consequent.end, this.end );
+				this.consequent.render( code, es );
+			} else {
+				code.remove( this.start, this.alternate.start );
+				code.remove( this.alternate.end, this.end );
+				this.alternate.render( code, es );
+			}
+		}
+	};
+
+	return ConditionalExpression;
+}(Node$1));
+
+var EmptyStatement = (function (Statement$$1) {
+	function EmptyStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) EmptyStatement.__proto__ = Statement$$1;
+	EmptyStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	EmptyStatement.prototype.constructor = EmptyStatement;
+
+	EmptyStatement.prototype.render = function render ( code ) {
+		if ( this.parent.type === 'BlockStatement' || this.parent.type === 'Program' ) {
+			code.remove( this.start, this.end );
+		}
+	};
+
+	return EmptyStatement;
+}(Statement));
+
+var ExportAllDeclaration = (function (Node) {
+	function ExportAllDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ExportAllDeclaration.__proto__ = Node;
+	ExportAllDeclaration.prototype = Object.create( Node && Node.prototype );
+	ExportAllDeclaration.prototype.constructor = ExportAllDeclaration;
+
+	ExportAllDeclaration.prototype.initialise = function initialise () {
+		this.isExportDeclaration = true;
+	};
+
+	ExportAllDeclaration.prototype.render = function render ( code ) {
+		code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+	};
+
+	return ExportAllDeclaration;
+}(Node$1));
+
+var functionOrClassDeclaration = /^(?:Function|Class)Declaration/;
+
+var ExportDefaultDeclaration = (function (Node) {
+	function ExportDefaultDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ExportDefaultDeclaration.__proto__ = Node;
+	ExportDefaultDeclaration.prototype = Object.create( Node && Node.prototype );
+	ExportDefaultDeclaration.prototype.constructor = ExportDefaultDeclaration;
+
+	ExportDefaultDeclaration.prototype.initialise = function initialise ( scope ) {
+		this.isExportDeclaration = true;
+		this.isDefault = true;
+
+		this.name = ( this.declaration.id && this.declaration.id.name ) || this.declaration.name || this.module.basename();
+		scope.declarations.default = this;
+
+		this.declaration.initialise( scope );
+	};
+
+	ExportDefaultDeclaration.prototype.activate = function activate () {
+		if ( this.activated ) return;
+		this.activated = true;
+
+		this.run();
+	};
+
+	ExportDefaultDeclaration.prototype.addReference = function addReference ( reference ) {
+		this.name = reference.name;
+		if ( this.original ) this.original.addReference( reference );
+	};
+
+	ExportDefaultDeclaration.prototype.bind = function bind ( scope ) {
+		var name = ( this.declaration.id && this.declaration.id.name ) || this.declaration.name;
+		if ( name ) this.original = scope.findDeclaration( name );
+
+		this.declaration.bind( scope );
+	};
+
+	ExportDefaultDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		this.declaration.gatherPossibleValues( values );
+	};
+
+	ExportDefaultDeclaration.prototype.getName = function getName ( es ) {
+		if ( this.original && !this.original.isReassigned ) {
+			return this.original.getName( es );
+		}
+
+		return this.name;
+	};
+
+	// TODO this is total chaos, tidy it up
+	ExportDefaultDeclaration.prototype.render = function render ( code, es ) {
+		var treeshake = this.module.bundle.treeshake;
+		var name = this.getName( es );
+
+		// paren workaround: find first non-whitespace character position after `export default`
+		var declaration_start;
+		if ( this.declaration ) {
+			var statementStr = code.original.slice( this.start, this.end );
+			declaration_start = this.start + statementStr.match(/^\s*export\s+default\s*/)[0].length;
+		}
+
+		if ( this.shouldInclude || this.declaration.activated ) {
+			if ( this.declaration.type === 'CallExpression' && this.declaration.callee.type === 'FunctionExpression' && this.declaration.arguments.length ) {
+				// we're exporting an IIFE. Check it doesn't look unintentional (#1011)
+				var isWrapped = /\(/.test( code.original.slice( this.start, this.declaration.start ) );
+
+				if ( !isWrapped ) {
+					code.insertRight( this.declaration.callee.start, '(' );
+					code.insertLeft( this.declaration.callee.end, ')' );
+
+					var start = this.declaration.callee.end;
+					var end = this.declaration.arguments[0].start - 1;
+					while ( code.original[ end ] !== '(' ) end -= 1;
+
+					var newlineSeparated = /\n/.test( code.original.slice( start, end ) );
+
+					if ( newlineSeparated ) {
+						this.module.warn({
+							code: 'AMBIGUOUS_DEFAULT_EXPORT',
+							message: "Ambiguous default export (is a call expression, but looks like a function declaration)",
+							url: 'https://github.com/rollup/rollup/wiki/Troubleshooting#ambiguous-default-export'
+						}, this.declaration.start );
+					}
+				}
+			}
+
+			if ( this.activated ) {
+				if ( functionOrClassDeclaration.test( this.declaration.type ) ) {
+					if ( this.declaration.id ) {
+						code.remove( this.start, declaration_start );
+					} else {
+						throw new Error( 'TODO anonymous class/function declaration' );
+					}
+				}
+
+				else {
+					if ( this.original && this.original.getName( es ) === name ) {
+						// prevent `var foo = foo`
+						code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+						return; // don't render children. TODO this seems like a bit of a hack
+					} else {
+						code.overwrite( this.start, declaration_start, ((this.module.bundle.varOrConst) + " " + name + " = ") );
+					}
+
+					this.insertSemicolon( code );
+				}
+			} else {
+				// remove `var foo` from `var foo = bar()`, if `foo` is unused
+				code.remove( this.start, declaration_start );
+			}
+
+			Node.prototype.render.call( this, code, es );
+		} else {
+			if ( treeshake ) {
+				if ( functionOrClassDeclaration.test( this.declaration.type ) ) {
+					code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+				} else {
+					var hasEffects = this.declaration.hasEffects( this.module.scope );
+					code.remove( this.start, hasEffects ? declaration_start : this.next || this.end );
+				}
+			} else {
+				code.overwrite( this.start, declaration_start, ((this.module.bundle.varOrConst) + " " + name + " = ") );
+			}
+			// code.remove( this.start, this.next || this.end );
+		}
+	};
+
+	ExportDefaultDeclaration.prototype.run = function run ( scope ) {
+		this.shouldInclude = true;
+		Node.prototype.run.call( this, scope );
+	};
+
+	return ExportDefaultDeclaration;
+}(Node$1));
+
+var ExportNamedDeclaration = (function (Node) {
+	function ExportNamedDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ExportNamedDeclaration.__proto__ = Node;
+	ExportNamedDeclaration.prototype = Object.create( Node && Node.prototype );
+	ExportNamedDeclaration.prototype.constructor = ExportNamedDeclaration;
+
+	ExportNamedDeclaration.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+		this.isExportDeclaration = true;
+
+		if ( this.declaration ) this.declaration.initialise( scope );
+	};
+
+	ExportNamedDeclaration.prototype.bind = function bind ( scope ) {
+		if ( this.declaration ) this.declaration.bind( scope );
+	};
+
+	ExportNamedDeclaration.prototype.render = function render ( code, es ) {
+		if ( this.declaration ) {
+			code.remove( this.start, this.declaration.start );
+			this.declaration.render( code, es );
+		} else {
+			var start = this.leadingCommentStart || this.start;
+			var end = this.next || this.end;
+
+			if ( this.defaultExport ) {
+				var name = this.defaultExport.getName( es );
+				var originalName = this.defaultExport.original.getName( es );
+
+				if ( name !== originalName ) {
+					code.overwrite( start, end, ("var " + name + " = " + originalName + ";") );
+					return;
+				}
+			}
+
+			code.remove( start, end );
+		}
+	};
+
+	return ExportNamedDeclaration;
+}(Node$1));
+
+var ExpressionStatement = (function (Statement$$1) {
+	function ExpressionStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) ExpressionStatement.__proto__ = Statement$$1;
+	ExpressionStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	ExpressionStatement.prototype.constructor = ExpressionStatement;
+
+	ExpressionStatement.prototype.render = function render ( code, es ) {
+		Statement$$1.prototype.render.call( this, code, es );
+		if ( this.shouldInclude ) this.insertSemicolon( code );
+	};
+
+	return ExpressionStatement;
+}(Statement));
+
+var ForStatement = (function (Statement$$1) {
+	function ForStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) ForStatement.__proto__ = Statement$$1;
+	ForStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	ForStatement.prototype.constructor = ForStatement;
+
+	ForStatement.prototype.initialise = function initialise ( scope ) {
+		if ( this.body.type === 'BlockStatement' ) {
+			this.body.createScope( scope );
+			this.scope = this.body.scope;
+		} else {
+			this.scope = new Scope({
+				parent: scope,
+				isBlockScope: true,
+				isLexicalBoundary: false
+			});
+		}
+
+		// can't use super, because we need to control the order
+		if ( this.init ) this.init.initialise( this.scope );
+		if ( this.test ) this.test.initialise( this.scope );
+		if ( this.update ) this.update.initialise( this.scope );
+		this.body.initialise( this.scope );
+	};
+
+	return ForStatement;
+}(Statement));
+
+function assignToForLoopLeft ( node, scope, value ) {
+	if ( node.type === 'VariableDeclaration' ) {
+		for ( var proxy of node.declarations[0].proxies.values() ) {
+			proxy.possibleValues.add( value );
+		}
+	}
+
+	else {
+		if ( node.type === 'MemberExpression' ) {
+			// apparently this is legal JavaScript? Though I don't know what
+			// kind of monster would write `for ( foo.bar of thing ) {...}`
+
+			// for now, do nothing, as I'm not sure anything needs to happen...
+		}
+
+		else {
+			for ( var name of extractNames( node ) ) {
+				var declaration = scope.findDeclaration( name );
+				if ( declaration.possibleValues ) {
+					declaration.possibleValues.add( value );
+				}
+			}
+		}
+	}
+}
+
+var ForInStatement = (function (Statement$$1) {
+	function ForInStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) ForInStatement.__proto__ = Statement$$1;
+	ForInStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	ForInStatement.prototype.constructor = ForInStatement;
+
+	ForInStatement.prototype.initialise = function initialise ( scope ) {
+		if ( this.body.type === 'BlockStatement' ) {
+			this.body.createScope( scope );
+			this.scope = this.body.scope;
+		} else {
+			this.scope = new Scope({
+				parent: scope,
+				isBlockScope: true,
+				isLexicalBoundary: false
+			});
+		}
+
+		Statement$$1.prototype.initialise.call( this, this.scope );
+		assignToForLoopLeft( this.left, this.scope, STRING );
+	};
+
+	return ForInStatement;
+}(Statement));
+
+var ForOfStatement = (function (Statement$$1) {
+	function ForOfStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) ForOfStatement.__proto__ = Statement$$1;
+	ForOfStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	ForOfStatement.prototype.constructor = ForOfStatement;
+
+	ForOfStatement.prototype.initialise = function initialise ( scope ) {
+		if ( this.body.type === 'BlockStatement' ) {
+			this.body.createScope( scope );
+			this.scope = this.body.scope;
+		} else {
+			this.scope = new Scope({
+				parent: scope,
+				isBlockScope: true,
+				isLexicalBoundary: false
+			});
+		}
+
+		Statement$$1.prototype.initialise.call( this, this.scope );
+		assignToForLoopLeft( this.left, this.scope, UNKNOWN );
+	};
+
+	return ForOfStatement;
+}(Statement));
+
+var FunctionDeclaration = (function (Node) {
+	function FunctionDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) FunctionDeclaration.__proto__ = Node;
+	FunctionDeclaration.prototype = Object.create( Node && Node.prototype );
+	FunctionDeclaration.prototype.constructor = FunctionDeclaration;
+
+	FunctionDeclaration.prototype.activate = function activate () {
+		if ( this.activated ) return;
+		this.activated = true;
+
+		var scope = this.body.scope;
+		this.params.forEach( function (param) { return param.run( scope ); } ); // in case of assignment patterns
+		this.body.run();
+	};
+
+	FunctionDeclaration.prototype.addReference = function addReference () {
+		/* noop? */
+	};
+
+	FunctionDeclaration.prototype.bind = function bind ( scope ) {
+		var this$1 = this;
+
+		this.id.bind( scope );
+		this.params.forEach( function (param) { return param.bind( this$1.body.scope ); } );
+		this.body.bind( scope );
+	};
+
+	FunctionDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( this );
+	};
+
+	FunctionDeclaration.prototype.getName = function getName () {
+		return this.name;
+	};
+
+	FunctionDeclaration.prototype.hasEffects = function hasEffects () {
+		return false;
+	};
+
+	FunctionDeclaration.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+		this.name = this.id.name; // may be overridden by bundle.deconflict
+		scope.addDeclaration( this.name, this, false, false );
+
+		this.body.createScope( scope );
+
+		this.id.initialise( scope );
+		this.params.forEach( function (param) { return param.initialise( this$1.body.scope ); } );
+		this.body.initialise();
+	};
+
+	FunctionDeclaration.prototype.render = function render ( code, es ) {
+		if ( !this.module.bundle.treeshake || this.activated ) {
+			Node.prototype.render.call( this, code, es );
+		} else {
+			code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+		}
+	};
+
+	FunctionDeclaration.prototype.run = function run ( scope ) {
+		if ( this.parent.type === 'ExportDefaultDeclaration' ) {
+			Node.prototype.run.call( this, scope );
+		}
+	};
+
+	return FunctionDeclaration;
+}(Node$1));
+
+var FunctionExpression = (function (Node) {
+	function FunctionExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) FunctionExpression.__proto__ = Node;
+	FunctionExpression.prototype = Object.create( Node && Node.prototype );
+	FunctionExpression.prototype.constructor = FunctionExpression;
+
+	FunctionExpression.prototype.activate = function activate () {
+		if ( this.activated ) return;
+		this.activated = true;
+
+		var scope = this.body.scope;
+		this.params.forEach( function (param) { return param.run( scope ); } ); // in case of assignment patterns
+		this.body.run();
+	};
+
+	FunctionExpression.prototype.addReference = function addReference () {
+		/* noop? */
+	};
+
+	FunctionExpression.prototype.bind = function bind () {
+		var this$1 = this;
+
+		if ( this.id ) this.id.bind( this.body.scope );
+		this.params.forEach( function (param) { return param.bind( this$1.body.scope ); } );
+		this.body.bind();
+	};
+
+	FunctionExpression.prototype.getName = function getName () {
+		return this.name;
+	};
+
+	FunctionExpression.prototype.hasEffects = function hasEffects () {
+		return false;
+	};
+
+	FunctionExpression.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+		this.name = this.id && this.id.name; // may be overridden by bundle.deconflict
+		this.body.createScope( scope );
+
+		if ( this.id ) {
+			this.id.initialise( this.body.scope );
+			this.body.scope.addDeclaration( this.id.name, this, false, false );
+		}
+
+		this.params.forEach( function (param) { return param.initialise( this$1.body.scope ); } );
+		this.body.initialise();
+	};
+
+	return FunctionExpression;
+}(Node$1));
+
+function isAssignmentPatternLhs ( node, parent ) {
+	// special case: `({ foo = 42 }) => {...}`
+	// `foo` actually has two different parents, the Property of the
+	// ObjectPattern, and the AssignmentPattern. In one case it's a
+	// reference, in one case it's not, because it's shorthand for
+	// `({ foo: foo = 42 }) => {...}`. But unlike a regular shorthand
+	// property, the `foo` node appears at different levels of the tree
+	return (
+		parent.type === 'Property' &&
+		parent.shorthand &&
+		parent.value.type === 'AssignmentPattern' &&
+		parent.value.left === node
+	);
+}
+
+var Identifier = (function (Node) {
+	function Identifier () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) Identifier.__proto__ = Node;
+	Identifier.prototype = Object.create( Node && Node.prototype );
+	Identifier.prototype.constructor = Identifier;
+
+	Identifier.prototype.bind = function bind ( scope ) {
+		if ( isReference( this, this.parent ) || isAssignmentPatternLhs( this, this.parent ) ) {
+			this.declaration = scope.findDeclaration( this.name );
+			this.declaration.addReference( this ); // TODO necessary?
+		}
+	};
+
+	Identifier.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		if ( isReference( this, this.parent ) ) {
+			values.add( this );
+		}
+	};
+
+	Identifier.prototype.render = function render ( code, es ) {
+		if ( this.declaration ) {
+			var name = this.declaration.getName( es );
+			if ( name !== this.name ) {
+				code.overwrite( this.start, this.end, name, true );
+
+				// special case
+				if ( this.parent.type === 'Property' && this.parent.shorthand ) {
+					code.insertLeft( this.start, ((this.name) + ": ") );
+				}
+			}
+		}
+	};
+
+	Identifier.prototype.run = function run () {
+		if ( this.declaration ) this.declaration.activate();
+	};
+
+	return Identifier;
+}(Node$1));
+
+// Statement types which may contain if-statements as direct children.
+var statementsWithIfStatements = new Set([
+	'DoWhileStatement',
+	'ForInStatement',
+	'ForOfStatement',
+	'ForStatement',
+	'IfStatement',
+	'WhileStatement'
+]);
+
+function handleVarDeclarations ( node, scope ) {
+	var hoistedVars = [];
+
+	function visit ( node ) {
+		if ( node.type === 'VariableDeclaration' && node.kind === 'var' ) {
+			node.declarations.forEach( function (declarator) {
+				declarator.init = null;
+				declarator.initialise( scope );
+
+				extractNames( declarator.id ).forEach( function (name) {
+					if ( !~hoistedVars.indexOf( name ) ) hoistedVars.push( name );
+				});
+			});
+		}
+
+		else if ( !/Function/.test( node.type ) ) {
+			node.eachChild( visit );
+		}
+	}
+
+	visit( node );
+
+	return hoistedVars;
+}
+
+// TODO DRY this out
+var IfStatement = (function (Statement$$1) {
+	function IfStatement () {
+		Statement$$1.apply(this, arguments);
+	}
+
+	if ( Statement$$1 ) IfStatement.__proto__ = Statement$$1;
+	IfStatement.prototype = Object.create( Statement$$1 && Statement$$1.prototype );
+	IfStatement.prototype.constructor = IfStatement;
+
+	IfStatement.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+		this.testValue = this.test.getValue();
+
+		if ( this.module.bundle.treeshake ) {
+			if ( this.testValue === UNKNOWN ) {
+				Statement$$1.prototype.initialise.call( this, scope );
+			}
+
+			else if ( this.testValue ) {
+				this.consequent.initialise( scope );
+
+				if ( this.alternate ) this.hoistedVars = handleVarDeclarations( this.alternate, scope );
+				this.alternate = null;
+			}
+
+			else {
+				if ( this.alternate ) this.alternate.initialise( scope );
+
+				this.hoistedVars = handleVarDeclarations( this.consequent, scope );
+				this.consequent = null;
+			}
+		}
+
+		else {
+			Statement$$1.prototype.initialise.call( this, scope );
+		}
+	};
+
+	IfStatement.prototype.render = function render ( code, es ) {
+		var this$1 = this;
+
+		if ( this.module.bundle.treeshake ) {
+			if ( this.testValue === UNKNOWN ) {
+				Statement$$1.prototype.render.call( this, code, es );
+			}
+
+			else {
+				code.overwrite( this.test.start, this.test.end, JSON.stringify( this.testValue ) );
+
+				// TODO if no block-scoped declarations, remove enclosing
+				// curlies and dedent block (if there is a block)
+
+				if ( this.hoistedVars ) {
+					var names = this.hoistedVars
+						.map( function (name) {
+							var declaration = this$1.scope.findDeclaration( name );
+							return declaration.activated ? declaration.getName() : null;
+						})
+						.filter( Boolean );
+
+					if ( names.length > 0 ) {
+						code.insertLeft( this.start, ("var " + (names.join( ', ' )) + ";\n\n") );
+					}
+				}
+
+				if ( this.testValue ) {
+					code.remove( this.start, this.consequent.start );
+					code.remove( this.consequent.end, this.end );
+					this.consequent.render( code, es );
+				}
+
+				else {
+					code.remove( this.start, this.alternate ? this.alternate.start : this.next || this.end );
+
+					if ( this.alternate ) {
+						this.alternate.render( code, es );
+					}
+
+					else if ( statementsWithIfStatements.has( this.parent.type ) ) {
+						code.insertRight( this.start, '{}' );
+					}
+				}
+			}
+		}
+
+		else {
+			Statement$$1.prototype.render.call( this, code, es );
+		}
+	};
+
+	return IfStatement;
+}(Statement));
+
+var ImportDeclaration = (function (Node) {
+	function ImportDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ImportDeclaration.__proto__ = Node;
+	ImportDeclaration.prototype = Object.create( Node && Node.prototype );
+	ImportDeclaration.prototype.constructor = ImportDeclaration;
+
+	ImportDeclaration.prototype.bind = function bind () {
+		// noop
+		// TODO do the inter-module binding setup here?
+	};
+
+	ImportDeclaration.prototype.initialise = function initialise () {
+		this.isImportDeclaration = true;
+	};
+
+	ImportDeclaration.prototype.render = function render ( code ) {
+		code.remove( this.start, this.next || this.end );
+	};
+
+	return ImportDeclaration;
+}(Node$1));
+
+var Literal = (function (Node) {
+	function Literal () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) Literal.__proto__ = Node;
+	Literal.prototype = Object.create( Node && Node.prototype );
+	Literal.prototype.constructor = Literal;
+
+	Literal.prototype.getValue = function getValue () {
+		return this.value;
+	};
+
+	Literal.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( this );
+	};
+
+	Literal.prototype.render = function render ( code ) {
+		if ( typeof this.value === 'string' ) {
+			code.indentExclusionRanges.push([ this.start + 1, this.end - 1 ]);
+		}
+	};
+
+	return Literal;
+}(Node$1));
+
+var operators$1 = {
+	'&&': function ( left, right ) { return left && right; },
+	'||': function ( left, right ) { return left || right; }
+};
+
+var LogicalExpression = (function (Node) {
+	function LogicalExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) LogicalExpression.__proto__ = Node;
+	LogicalExpression.prototype = Object.create( Node && Node.prototype );
+	LogicalExpression.prototype.constructor = LogicalExpression;
+
+	LogicalExpression.prototype.getValue = function getValue () {
+		var leftValue = this.left.getValue();
+		if ( leftValue === UNKNOWN ) return UNKNOWN;
+
+		var rightValue = this.right.getValue();
+		if ( rightValue === UNKNOWN ) return UNKNOWN;
+
+		return operators$1[ this.operator ]( leftValue, rightValue );
+	};
+
+	return LogicalExpression;
+}(Node$1));
+
+var Keypath = function Keypath ( node ) {
+	var this$1 = this;
+
+	this.parts = [];
+
+	while ( node.type === 'MemberExpression' ) {
+		this$1.parts.unshift( node.property );
+		node = node.object;
+	}
+
+	this.root = node;
+};
+
+var MemberExpression = (function (Node) {
+	function MemberExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) MemberExpression.__proto__ = Node;
+	MemberExpression.prototype = Object.create( Node && Node.prototype );
+	MemberExpression.prototype.constructor = MemberExpression;
+
+	MemberExpression.prototype.bind = function bind ( scope ) {
+		var this$1 = this;
+
+		// if this resolves to a namespaced declaration, prepare
+		// to replace it
+		// TODO this code is a bit inefficient
+		if ( isReference( this ) ) { // TODO optimise namespace access like `foo['bar']` as well
+			var keypath = new Keypath( this );
+
+			var declaration = scope.findDeclaration( keypath.root.name );
+
+			while ( declaration.isNamespace && keypath.parts.length ) {
+				var exporterId = declaration.module.id;
+
+				var part = keypath.parts[0];
+				declaration = declaration.module.traceExport( part.name );
+
+				if ( !declaration ) {
+					this$1.module.warn({
+						code: 'MISSING_EXPORT',
+						message: ("'" + (part.name) + "' is not exported by '" + (relativeId( exporterId )) + "'"),
+						url: "https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module"
+					}, part.start );
+					this$1.replacement = 'undefined';
+					return;
+				}
+
+				keypath.parts.shift();
+			}
+
+			if ( keypath.parts.length ) {
+				Node.prototype.bind.call( this, scope );
+				return; // not a namespaced declaration
+			}
+
+			this.declaration = declaration;
+
+			if ( declaration.isExternal ) {
+				declaration.module.suggestName( keypath.root.name );
+			}
+		}
+
+		else {
+			Node.prototype.bind.call( this, scope );
+		}
+	};
+
+	MemberExpression.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( UNKNOWN ); // TODO
+	};
+
+	MemberExpression.prototype.render = function render ( code, es ) {
+		if ( this.declaration ) {
+			var name = this.declaration.getName( es );
+			if ( name !== this.name ) code.overwrite( this.start, this.end, name, true );
+		}
+
+		else if ( this.replacement ) {
+			code.overwrite( this.start, this.end, this.replacement, true );
+		}
+
+		Node.prototype.render.call( this, code, es );
+	};
+
+	MemberExpression.prototype.run = function run ( scope ) {
+		if ( this.declaration ) this.declaration.activate();
+		Node.prototype.run.call( this, scope );
+	};
+
+	return MemberExpression;
+}(Node$1));
+
+var NewExpression = (function (Node) {
+	function NewExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) NewExpression.__proto__ = Node;
+	NewExpression.prototype = Object.create( Node && Node.prototype );
+	NewExpression.prototype.constructor = NewExpression;
+
+	NewExpression.prototype.hasEffects = function hasEffects ( scope ) {
+		return callHasEffects( scope, this.callee, true );
+	};
+
+	return NewExpression;
+}(Node$1));
+
+var ObjectExpression = (function (Node) {
+	function ObjectExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ObjectExpression.__proto__ = Node;
+	ObjectExpression.prototype = Object.create( Node && Node.prototype );
+	ObjectExpression.prototype.constructor = ObjectExpression;
+
+	ObjectExpression.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+		values.add( OBJECT );
+	};
+
+	return ObjectExpression;
+}(Node$1));
+
+var ReturnStatement = (function (Node) {
+	function ReturnStatement () {
+		Node.apply(this, arguments);
+	}if ( Node ) ReturnStatement.__proto__ = Node;
+	ReturnStatement.prototype = Object.create( Node && Node.prototype );
+	ReturnStatement.prototype.constructor = ReturnStatement;
+
+	
+
+	return ReturnStatement;
+}(Node$1));
+
+var TemplateLiteral = (function (Node) {
+	function TemplateLiteral () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) TemplateLiteral.__proto__ = Node;
+	TemplateLiteral.prototype = Object.create( Node && Node.prototype );
+	TemplateLiteral.prototype.constructor = TemplateLiteral;
+
+	TemplateLiteral.prototype.render = function render ( code, es ) {
+		code.indentExclusionRanges.push([ this.start, this.end ]);
+		Node.prototype.render.call( this, code, es );
+	};
+
+	return TemplateLiteral;
+}(Node$1));
+
+var ThisExpression = (function (Node) {
+	function ThisExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ThisExpression.__proto__ = Node;
+	ThisExpression.prototype = Object.create( Node && Node.prototype );
+	ThisExpression.prototype.constructor = ThisExpression;
+
+	ThisExpression.prototype.initialise = function initialise ( scope ) {
+		var lexicalBoundary = scope.findLexicalBoundary();
+
+		if ( lexicalBoundary.isModuleScope ) {
+			this.alias = this.module.context;
+			if ( this.alias === 'undefined' ) {
+				this.module.warn({
+					code: 'THIS_IS_UNDEFINED',
+					message: "The 'this' keyword is equivalent to 'undefined' at the top level of an ES module, and has been rewritten",
+					url: "https://github.com/rollup/rollup/wiki/Troubleshooting#this-is-undefined"
+				}, this.start );
+			}
+		}
+	};
+
+	ThisExpression.prototype.render = function render ( code ) {
+		if ( this.alias ) {
+			code.overwrite( this.start, this.end, this.alias, true );
+		}
+	};
+
+	return ThisExpression;
+}(Node$1));
+
+var ThrowStatement = (function (Node) {
+	function ThrowStatement () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) ThrowStatement.__proto__ = Node;
+	ThrowStatement.prototype = Object.create( Node && Node.prototype );
+	ThrowStatement.prototype.constructor = ThrowStatement;
+
+	ThrowStatement.prototype.hasEffects = function hasEffects () {
+		return true;
+	};
+
+	return ThrowStatement;
+}(Node$1));
+
+var operators$2 = {
+	"-": function (value) { return -value; },
+	"+": function (value) { return +value; },
+	"!": function (value) { return !value; },
+	"~": function (value) { return ~value; },
+	typeof: function (value) { return typeof value; },
+	void: function () { return undefined; },
+	delete: function () { return UNKNOWN; }
+};
+
+var UnaryExpression = (function (Node) {
+	function UnaryExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) UnaryExpression.__proto__ = Node;
+	UnaryExpression.prototype = Object.create( Node && Node.prototype );
+	UnaryExpression.prototype.constructor = UnaryExpression;
+
+	UnaryExpression.prototype.bind = function bind ( scope ) {
+		if ( this.value === UNKNOWN ) Node.prototype.bind.call( this, scope );
+	};
+
+	UnaryExpression.prototype.getValue = function getValue () {
+		var argumentValue = this.argument.getValue();
+		if ( argumentValue === UNKNOWN ) return UNKNOWN;
+
+		return operators$2[ this.operator ]( argumentValue );
+	};
+
+	UnaryExpression.prototype.hasEffects = function hasEffects ( scope ) {
+		return this.operator === 'delete' || this.argument.hasEffects( scope );
+	};
+
+	UnaryExpression.prototype.initialise = function initialise ( scope ) {
+		this.value = this.getValue();
+		if ( this.value === UNKNOWN ) Node.prototype.initialise.call( this, scope );
+	};
+
+	return UnaryExpression;
+}(Node$1));
+
+var UpdateExpression = (function (Node) {
+	function UpdateExpression () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) UpdateExpression.__proto__ = Node;
+	UpdateExpression.prototype = Object.create( Node && Node.prototype );
+	UpdateExpression.prototype.constructor = UpdateExpression;
+
+	UpdateExpression.prototype.bind = function bind ( scope ) {
+		var subject = this.argument;
+
+		this.subject = subject;
+		disallowIllegalReassignment( scope, this.argument );
+
+		if ( subject.type === 'Identifier' ) {
+			var declaration = scope.findDeclaration( subject.name );
+			declaration.isReassigned = true;
+
+			if ( declaration.possibleValues ) {
+				declaration.possibleValues.add( NUMBER );
+			}
+		}
+
+		Node.prototype.bind.call( this, scope );
+	};
+
+	UpdateExpression.prototype.hasEffects = function hasEffects ( scope ) {
+		return isUsedByBundle( scope, this.subject );
+	};
+
+	UpdateExpression.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+
+		this.module.bundle.dependentExpressions.push( this );
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	UpdateExpression.prototype.isUsedByBundle = function isUsedByBundle$1 () {
+		return isUsedByBundle( this.scope, this.subject );
+	};
+
+	return UpdateExpression;
+}(Node$1));
+
+var DeclaratorProxy = function DeclaratorProxy ( name, declarator, isTopLevel, init ) {
+	this.name = name;
+	this.declarator = declarator;
+
+	this.activated = false;
+	this.isReassigned = false;
+	this.exportName = null;
+
+	this.duplicates = [];
+	this.possibleValues = new Set( init ? [ init ] : null );
+};
+
+DeclaratorProxy.prototype.activate = function activate () {
+	this.activated = true;
+	this.declarator.activate();
+	this.duplicates.forEach( function (dupe) { return dupe.activate(); } );
+};
+
+DeclaratorProxy.prototype.addReference = function addReference () {
+	/* noop? */
+};
+
+DeclaratorProxy.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	this.possibleValues.forEach( function (value) { return values.add( value ); } );
+};
+
+DeclaratorProxy.prototype.getName = function getName ( es ) {
+	// TODO desctructuring...
+	if ( es ) return this.name;
+	if ( !this.isReassigned || !this.exportName ) return this.name;
+
+	return ("exports." + (this.exportName));
+};
+
+DeclaratorProxy.prototype.toString = function toString () {
+	return this.name;
+};
+
+var VariableDeclarator = (function (Node) {
+	function VariableDeclarator () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) VariableDeclarator.__proto__ = Node;
+	VariableDeclarator.prototype = Object.create( Node && Node.prototype );
+	VariableDeclarator.prototype.constructor = VariableDeclarator;
+
+	VariableDeclarator.prototype.activate = function activate () {
+		if ( this.activated ) return;
+		this.activated = true;
+
+		this.run( this.findScope() );
+
+		// if declaration is inside a block, ensure that the block
+		// is marked for inclusion
+		if ( this.parent.kind === 'var' ) {
+			var node = this.parent.parent;
+			while ( /Statement/.test( node.type ) ) {
+				node.shouldInclude = true;
+				node = node.parent;
+			}
+		}
+	};
+
+	VariableDeclarator.prototype.hasEffects = function hasEffects ( scope ) {
+		return this.init && this.init.hasEffects( scope );
+	};
+
+	VariableDeclarator.prototype.initialise = function initialise ( scope ) {
+		var this$1 = this;
+
+		this.proxies = new Map();
+
+		var lexicalBoundary = scope.findLexicalBoundary();
+
+		var init = this.init ?
+			( this.id.type === 'Identifier' ? this.init : UNKNOWN ) : // TODO maybe UNKNOWN is unnecessary
+			null;
+
+		extractNames( this.id ).forEach( function (name) {
+			var proxy = new DeclaratorProxy( name, this$1, lexicalBoundary.isModuleScope, init );
+
+			this$1.proxies.set( name, proxy );
+			scope.addDeclaration( name, proxy, this$1.parent.kind === 'var' );
+		});
+
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	VariableDeclarator.prototype.render = function render ( code, es ) {
+		var this$1 = this;
+
+		extractNames( this.id ).forEach( function (name) {
+			var declaration = this$1.proxies.get( name );
+
+			if ( !es && declaration.exportName && declaration.isReassigned ) {
+				if ( this$1.init ) {
+					code.overwrite( this$1.start, this$1.id.end, declaration.getName( es ) );
+				} else if ( this$1.module.bundle.treeshake ) {
+					code.remove( this$1.start, this$1.end );
+				}
+			}
+		});
+
+		Node.prototype.render.call( this, code, es );
+	};
+
+	return VariableDeclarator;
+}(Node$1));
+
+function getSeparator ( code, start ) {
+	var c = start;
+
+	while ( c > 0 && code[ c - 1 ] !== '\n' ) {
+		c -= 1;
+		if ( code[c] === ';' || code[c] === '{' ) return '; ';
+	}
+
+	var lineStart = code.slice( c, start ).match( /^\s*/ )[0];
+
+	return (";\n" + lineStart);
+}
+
+var forStatement = /^For(?:Of|In)?Statement/;
+
+var VariableDeclaration = (function (Node) {
+	function VariableDeclaration () {
+		Node.apply(this, arguments);
+	}
+
+	if ( Node ) VariableDeclaration.__proto__ = Node;
+	VariableDeclaration.prototype = Object.create( Node && Node.prototype );
+	VariableDeclaration.prototype.constructor = VariableDeclaration;
+
+	VariableDeclaration.prototype.initialise = function initialise ( scope ) {
+		this.scope = scope;
+		Node.prototype.initialise.call( this, scope );
+	};
+
+	VariableDeclaration.prototype.render = function render ( code, es ) {
+		var this$1 = this;
+
+		var treeshake = this.module.bundle.treeshake;
+
+		var shouldSeparate = false;
+		var separator;
+
+		if ( this.scope.isModuleScope && !forStatement.test( this.parent.type ) ) {
+			shouldSeparate = true;
+			separator = getSeparator( this.module.code, this.start );
+		}
+
+		var c = this.start;
+		var empty = true;
+
+		var loop = function ( i ) {
+			var declarator = this$1.declarations[i];
+
+			var prefix = empty ? '' : separator; // TODO indentation
+
+			if ( declarator.id.type === 'Identifier' ) {
+				var proxy = declarator.proxies.get( declarator.id.name );
+				var isExportedAndReassigned = !es && proxy.exportName && proxy.isReassigned;
+
+				if ( isExportedAndReassigned ) {
+					if ( declarator.init ) {
+						if ( shouldSeparate ) code.overwrite( c, declarator.start, prefix );
+						c = declarator.end;
+						empty = false;
+					}
+				} else if ( !treeshake || proxy.activated ) {
+					if ( shouldSeparate ) code.overwrite( c, declarator.start, ("" + prefix + (this$1.kind) + " ") ); // TODO indentation
+					c = declarator.end;
+					empty = false;
+				}
+			}
+
+			else {
+				var exportAssignments = [];
+				var activated = false;
+
+				extractNames( declarator.id ).forEach( function (name) {
+					var proxy = declarator.proxies.get( name );
+					var isExportedAndReassigned = !es && proxy.exportName && proxy.isReassigned;
+
+					if ( isExportedAndReassigned ) {
+						// code.overwrite( c, declarator.start, prefix );
+						// c = declarator.end;
+						// empty = false;
+						exportAssignments.push( 'TODO' );
+					} else if ( declarator.activated ) {
+						activated = true;
+					}
+				});
+
+				if ( !treeshake || activated ) {
+					if ( shouldSeparate ) code.overwrite( c, declarator.start, ("" + prefix + (this$1.kind) + " ") ); // TODO indentation
+					c = declarator.end;
+					empty = false;
+				}
+
+				if ( exportAssignments.length ) {
+					throw new Error( 'TODO' );
+				}
+			}
+
+			declarator.render( code, es );
+		};
+
+		for ( var i = 0; i < this.declarations.length; i += 1 ) loop( i );
+
+		if ( treeshake && empty ) {
+			code.remove( this.leadingCommentStart || this.start, this.next || this.end );
+		} else {
+			// always include a semi-colon (https://github.com/rollup/rollup/pull/1013),
+			// unless it's a var declaration in a loop head
+			var needsSemicolon = !forStatement.test( this.parent.type );
+
+			if ( this.end > c ) {
+				code.overwrite( c, this.end, needsSemicolon ? ';' : '' );
+			} else if ( needsSemicolon  ) {
+				this.insertSemicolon( code );
+			}
+		}
+	};
+
+	return VariableDeclaration;
+}(Node$1));
+
+var nodes = {
+	ArrayExpression: ArrayExpression,
+	ArrowFunctionExpression: ArrowFunctionExpression,
+	AssignmentExpression: AssignmentExpression,
+	BinaryExpression: BinaryExpression,
+	BlockStatement: BlockStatement,
+	CallExpression: CallExpression,
+	ClassDeclaration: ClassDeclaration,
+	ClassExpression: ClassExpression,
+	ConditionalExpression: ConditionalExpression,
+	DoWhileStatement: Statement,
+	EmptyStatement: EmptyStatement,
+	ExportAllDeclaration: ExportAllDeclaration,
+	ExportDefaultDeclaration: ExportDefaultDeclaration,
+	ExportNamedDeclaration: ExportNamedDeclaration,
+	ExpressionStatement: ExpressionStatement,
+	ForStatement: ForStatement,
+	ForInStatement: ForInStatement,
+	ForOfStatement: ForOfStatement,
+	FunctionDeclaration: FunctionDeclaration,
+	FunctionExpression: FunctionExpression,
+	Identifier: Identifier,
+	IfStatement: IfStatement,
+	ImportDeclaration: ImportDeclaration,
+	Literal: Literal,
+	LogicalExpression: LogicalExpression,
+	MemberExpression: MemberExpression,
+	NewExpression: NewExpression,
+	ObjectExpression: ObjectExpression,
+	ReturnStatement: ReturnStatement,
+	SwitchStatement: Statement,
+	TemplateLiteral: TemplateLiteral,
+	ThisExpression: ThisExpression,
+	ThrowStatement: ThrowStatement,
+	TryStatement: Statement,
+	UnaryExpression: UnaryExpression,
+	UpdateExpression: UpdateExpression,
+	VariableDeclarator: VariableDeclarator,
+	VariableDeclaration: VariableDeclaration,
+	WhileStatement: Statement
+};
+
+var keys$1 = {
+	Program: [ 'body' ],
+	Literal: []
+};
+
+var newline = /\n/;
+
+function enhance ( ast, module, comments ) {
+	enhanceNode( ast, module, module, module.magicString );
+
+	var comment = comments.shift();
+
+	for ( var node of ast.body ) {
+		if ( comment && ( comment.start < node.start ) ) {
+			node.leadingCommentStart = comment.start;
+		}
+
+		while ( comment && comment.end < node.end ) comment = comments.shift();
+
+		// if the next comment is on the same line as the end of the node,
+		// treat is as a trailing comment
+		if ( comment && !newline.test( module.code.slice( node.end, comment.start ) ) ) {
+			node.trailingCommentEnd = comment.end; // TODO is node.trailingCommentEnd used anywhere?
+			comment = comments.shift();
+		}
+
+		node.initialise( module.scope );
+	}
+}
+
+function enhanceNode ( raw, parent, module, code ) {
+	if ( !raw ) return;
+
+	if ( 'length' in raw ) {
+		for ( var i = 0; i < raw.length; i += 1 ) {
+			enhanceNode( raw[i], parent, module, code );
+		}
+
+		return;
+	}
+
+	// with e.g. shorthand properties, key and value are
+	// the same node. We don't want to enhance an object twice
+	if ( raw.__enhanced ) return;
+	raw.__enhanced = true;
+
+	if ( !keys$1[ raw.type ] ) {
+		keys$1[ raw.type ] = Object.keys( raw ).filter( function (key) { return typeof raw[ key ] === 'object'; } );
+	}
+
+	raw.parent = parent;
+	raw.module = module;
+	raw.keys = keys$1[ raw.type ];
+
+	code.addSourcemapLocation( raw.start );
+	code.addSourcemapLocation( raw.end );
+
+	for ( var key of keys$1[ raw.type ] ) {
+		enhanceNode( raw[ key ], raw, module, code );
+	}
+
+	var type = nodes[ raw.type ] || Node$1;
+	raw.__proto__ = type.prototype;
+}
+
+function clone ( node ) {
+	if ( !node ) return node;
+	if ( typeof node !== 'object' ) return node;
+
+	if ( Array.isArray( node ) ) {
+		var cloned$1 = new Array( node.length );
+		for ( var i = 0; i < node.length; i += 1 ) cloned$1[i] = clone( node[i] );
+		return cloned$1;
+	}
+
+	var cloned = {};
+	for ( var key in node ) {
+		cloned[ key ] = clone( node[ key ] );
+	}
+
+	return cloned;
+}
+
+var ModuleScope = (function (Scope$$1) {
+	function ModuleScope ( module ) {
+		Scope$$1.call(this, {
+			isBlockScope: false,
+			isLexicalBoundary: true,
+			isModuleScope: true,
+			parent: module.bundle.scope
+		});
+
+		this.module = module;
+	}
+
+	if ( Scope$$1 ) ModuleScope.__proto__ = Scope$$1;
+	ModuleScope.prototype = Object.create( Scope$$1 && Scope$$1.prototype );
+	ModuleScope.prototype.constructor = ModuleScope;
+
+	ModuleScope.prototype.deshadow = function deshadow ( names ) {
+		var this$1 = this;
+
+		names = new Set( names );
+
+		forOwn( this.module.imports, function (specifier) {
+			if ( specifier.module.isExternal ) return;
+
+			specifier.module.getExports().forEach( function (name) {
+				names.add( name );
+			});
+
+			if ( specifier.name !== '*' ) {
+				var declaration = specifier.module.traceExport( specifier.name );
+				if ( !declaration ) {
+					this$1.module.warn({
+						code: 'NON_EXISTENT_EXPORT',
+						message: ("Non-existent export '" + (specifier.name) + "' is imported from " + (relativeId( specifier.module.id )))
+					}, specifier.specifier.start );
+					return;
+				}
+
+				var name = declaration.getName( true );
+				if ( name !== specifier.name ) {
+					names.add( declaration.getName( true ) );
+				}
+			}
+		});
+
+		Scope$$1.prototype.deshadow.call( this, names );
+	};
+
+	ModuleScope.prototype.findDeclaration = function findDeclaration ( name ) {
+		if ( this.declarations[ name ] ) {
+			return this.declarations[ name ];
+		}
+
+		return this.module.trace( name ) || this.parent.findDeclaration( name );
+	};
+
+	ModuleScope.prototype.findLexicalBoundary = function findLexicalBoundary () {
+		return this;
+	};
+
+	return ModuleScope;
+}(Scope));
+
+function tryParse ( module, acornOptions ) {
+	try {
+		return parse( module.code, assign({
+			ecmaVersion: 8,
+			sourceType: 'module',
+			onComment: function ( block, text, start, end ) { return module.comments.push({ block: block, text: text, start: start, end: end }); },
+			preserveParens: false
+		}, acornOptions ));
+	} catch ( err ) {
+		module.error({
+			code: 'PARSE_ERROR',
+			message: err.message.replace( / \(\d+:\d+\)$/, '' )
+		}, err.pos );
+	}
+}
+
+var Module = function Module (ref) {
+	var this$1 = this;
+	var id = ref.id;
+	var code = ref.code;
+	var originalCode = ref.originalCode;
+	var originalSourceMap = ref.originalSourceMap;
+	var ast = ref.ast;
+	var sourceMapChain = ref.sourceMapChain;
+	var resolvedIds = ref.resolvedIds;
+	var bundle = ref.bundle;
+
+	this.code = code;
+	this.id = id;
+	this.bundle = bundle;
+	this.originalCode = originalCode;
+	this.originalSourceMap = originalSourceMap;
+	this.sourceMapChain = sourceMapChain;
+
+	this.comments = [];
+
+	timeStart( 'ast' );
+
+	if ( ast ) {
+		// prevent mutating the provided AST, as it may be reused on
+		// subsequent incremental rebuilds
+		this.ast = clone( ast );
+		this.astClone = ast;
+	} else {
+		this.ast = tryParse( this, bundle.acornOptions ); // TODO what happens to comments if AST is provided?
+		this.astClone = clone( this.ast );
+	}
+
+	timeEnd( 'ast' );
+
+	this.excludeFromSourcemap = /\0/.test( id );
+	this.context = bundle.getModuleContext( id );
+
+	// all dependencies
+	this.sources = [];
+	this.dependencies = [];
+	this.resolvedIds = resolvedIds || blank();
+
+	// imports and exports, indexed by local name
+	this.imports = blank();
+	this.exports = blank();
+	this.exportsAll = blank();
+	this.reexports = blank();
+
+	this.exportAllSources = [];
+	this.exportAllModules = null;
+
+	// By default, `id` is the filename. Custom resolvers and loaders
+	// can change that, but it makes sense to use it for the source filename
+	this.magicString = new MagicString( code, {
+		filename: this.excludeFromSourcemap ? null : id, // don't include plugin helpers in sourcemap
+		indentExclusionRanges: []
+	});
+
+	// remove existing sourceMappingURL comments
+	this.comments = this.comments.filter(function (comment) {
+		//only one line comment can contain source maps
+		var isSourceMapComment = !comment.block && SOURCEMAPPING_URL_RE.test(comment.text);
+		if (isSourceMapComment) {
+			this$1.magicString.remove(comment.start, comment.end );
+		}
+		return !isSourceMapComment;
+	});
+
+	this.declarations = blank();
+	this.type = 'Module'; // TODO only necessary so that Scope knows this should be treated as a function scope... messy
+	this.scope = new ModuleScope( this );
+
+	timeStart( 'analyse' );
+
+	this.analyse();
+
+	timeEnd( 'analyse' );
+
+	this.strongDependencies = [];
+};
+
+Module.prototype.addExport = function addExport ( node ) {
+		var this$1 = this;
+
+	var source = node.source && node.source.value;
+
+	// export { name } from './other.js'
+	if ( source ) {
+		if ( !~this.sources.indexOf( source ) ) this.sources.push( source );
+
+		if ( node.type === 'ExportAllDeclaration' ) {
+			// Store `export * from '...'` statements in an array of delegates.
+			// When an unknown import is encountered, we see if one of them can satisfy it.
+			this.exportAllSources.push( source );
+		}
+
+		else {
+			node.specifiers.forEach( function (specifier) {
+				var name = specifier.exported.name;
+
+				if ( this$1.exports[ name ] || this$1.reexports[ name ] ) {
+					this$1.error({
+						code: 'DUPLICATE_EXPORT',
+						message: ("A module cannot have multiple exports with the same name ('" + name + "')")
+					}, specifier.start );
+				}
+
+				this$1.reexports[ name ] = {
+					start: specifier.start,
+					source: source,
+					localName: specifier.local.name,
+					module: null // filled in later
+				};
+			});
+		}
+	}
+
+	// export default function foo () {}
+	// export default foo;
+	// export default 42;
+	else if ( node.type === 'ExportDefaultDeclaration' ) {
+		var identifier = ( node.declaration.id && node.declaration.id.name ) || node.declaration.name;
+
+		if ( this.exports.default ) {
+			this.error({
+				code: 'DUPLICATE_EXPORT',
+				message: "A module can only have one default export"
+			}, node.start );
+		}
+
+		this.exports.default = {
+			localName: 'default',
+			identifier: identifier
+		};
+
+		// create a synthetic declaration
+		//this.declarations.default = new SyntheticDefaultDeclaration( node, identifier || this.basename() );
+	}
+
+	// export var { foo, bar } = ...
+	// export var foo = 42;
+	// export var a = 1, b = 2, c = 3;
+	// export function foo () {}
+	else if ( node.declaration ) {
+		var declaration = node.declaration;
+
+		if ( declaration.type === 'VariableDeclaration' ) {
+			declaration.declarations.forEach( function (decl) {
+				extractNames( decl.id ).forEach( function (localName) {
+					this$1.exports[ localName ] = { localName: localName };
+				});
+			});
+		} else {
+			// export function foo () {}
+			var localName = declaration.id.name;
+			this.exports[ localName ] = { localName: localName };
+		}
+	}
+
+	// export { foo, bar, baz }
+	else {
+		if ( node.specifiers.length ) {
+			node.specifiers.forEach( function (specifier) {
+				var localName = specifier.local.name;
+				var exportedName = specifier.exported.name;
+
+				if ( this$1.exports[ exportedName ] || this$1.reexports[ exportedName ] ) {
+					this$1.error({
+						code: 'DUPLICATE_EXPORT',
+						message: ("A module cannot have multiple exports with the same name ('" + exportedName + "')")
+					}, specifier.start );
+				}
+
+				this$1.exports[ exportedName ] = { localName: localName };
+			});
+		} else {
+			// TODO is this really necessary? `export {}` is valid JS, and
+			// might be used as a hint that this is indeed a module
+			this.warn({
+				code: 'EMPTY_EXPORT',
+				message: "Empty export declaration"
+			}, node.start );
+		}
+	}
+};
+
+Module.prototype.addImport = function addImport ( node ) {
+		var this$1 = this;
+
+	var source = node.source.value;
+
+	if ( !~this.sources.indexOf( source ) ) this.sources.push( source );
+
+	node.specifiers.forEach( function (specifier) {
+		var localName = specifier.local.name;
+
+		if ( this$1.imports[ localName ] ) {
+			this$1.error({
+				code: 'DUPLICATE_IMPORT',
+				message: ("Duplicated import '" + localName + "'")
+			}, specifier.start );
+		}
+
+		var isDefault = specifier.type === 'ImportDefaultSpecifier';
+		var isNamespace = specifier.type === 'ImportNamespaceSpecifier';
+
+		var name = isDefault ? 'default' : isNamespace ? '*' : specifier.imported.name;
+		this$1.imports[ localName ] = { source: source, specifier: specifier, name: name, module: null };
+	});
+};
+
+Module.prototype.analyse = function analyse () {
+		var this$1 = this;
+
+	enhance( this.ast, this, this.comments );
+
+	// discover this module's imports and exports
+	var lastNode;
+
+	for ( var node of this.ast.body ) {
+		if ( node.isImportDeclaration ) {
+			this$1.addImport( node );
+		} else if ( node.isExportDeclaration ) {
+			this$1.addExport( node );
+		}
+
+		if ( lastNode ) lastNode.next = node.leadingCommentStart || node.start;
+		lastNode = node;
+	}
+};
+
+Module.prototype.basename = function basename$1 () {
+	var base = basename( this.id );
+	var ext = extname( this.id );
+
+	return makeLegalIdentifier( ext ? base.slice( 0, -ext.length ) : base );
+};
+
+Module.prototype.bindImportSpecifiers = function bindImportSpecifiers () {
+		var this$1 = this;
+
+	[ this.imports, this.reexports ].forEach( function (specifiers) {
+		keys( specifiers ).forEach( function (name) {
+			var specifier = specifiers[ name ];
+
+			var id = this$1.resolvedIds[ specifier.source ];
+			specifier.module = this$1.bundle.moduleById.get( id );
+		});
+	});
+
+	this.exportAllModules = this.exportAllSources.map( function (source) {
+		var id = this$1.resolvedIds[ source ];
+		return this$1.bundle.moduleById.get( id );
+	});
+
+	this.sources.forEach( function (source) {
+		var id = this$1.resolvedIds[ source ];
+		var module = this$1.bundle.moduleById.get( id );
+
+		if ( !module.isExternal ) this$1.dependencies.push( module );
+	});
+};
+
+Module.prototype.bindReferences = function bindReferences () {
+		var this$1 = this;
+
+	for ( var node of this.ast.body ) {
+		node.bind( this$1.scope );
+	}
+
+	// if ( this.declarations.default ) {
+	// if ( this.exports.default.identifier ) {
+	// 	const declaration = this.trace( this.exports.default.identifier );
+	// 	if ( declaration ) this.declarations.default.bind( declaration );
+	// }
+	// }
+};
+
+Module.prototype.error = function error$1 ( props, pos ) {
+	if ( pos !== undefined ) {
+		props.pos = pos;
+
+		var ref = locate( this.code, pos, { offsetLine: 1 });
+			var line = ref.line;
+			var column = ref.column; // TODO trace sourcemaps
+
+		props.loc = { file: this.id, line: line, column: column };
+		props.frame = getCodeFrame( this.code, line, column );
+	}
+
+	error( props );
+};
+
+Module.prototype.findParent = function findParent () {
+	// TODO what does it mean if we're here?
+	return null;
+};
+
+Module.prototype.findScope = function findScope () {
+	return this.scope;
+};
+
+Module.prototype.getExports = function getExports () {
+	var exports = blank();
+
+	keys( this.exports ).forEach( function (name) {
+		exports[ name ] = true;
+	});
+
+	keys( this.reexports ).forEach( function (name) {
+		exports[ name ] = true;
+	});
+
+	this.exportAllModules.forEach( function (module) {
+		if ( module.isExternal ) {
+			exports[ ("*" + (module.id)) ] = true;
+			return;
+		}
+
+		module.getExports().forEach( function (name) {
+				if ( name !== 'default' ) exports[ name ] = true;
+		});
+	});
+
+	return keys( exports );
+};
+
+Module.prototype.namespace = function namespace () {
+	if ( !this.declarations['*'] ) {
+		this.declarations['*'] = new SyntheticNamespaceDeclaration( this );
+	}
+
+	return this.declarations['*'];
+};
+
+Module.prototype.render = function render ( es, legacy ) {
+	var magicString = this.magicString.clone();
+
+	for ( var node of this.ast.body ) {
+		node.render( magicString, es );
+	}
+
+	if ( this.namespace().needsNamespaceBlock ) {
+		magicString.append( '\n\n' + this.namespace().renderBlock( es, legacy, '\t' ) ); // TODO use correct indentation
+	}
+
+	return magicString.trim();
+};
+
+Module.prototype.run = function run () {
+		var this$1 = this;
+
+	for ( var node of this.ast.body ) {
+		if ( node.hasEffects( this$1.scope ) ) {
+			node.run( this$1.scope );
+		}
+	}
+};
+
+Module.prototype.toJSON = function toJSON () {
+	return {
+		id: this.id,
+		dependencies: this.dependencies.map( function (module) { return module.id; } ),
+		code: this.code,
+		originalCode: this.originalCode,
+		ast: this.astClone,
+		sourceMapChain: this.sourceMapChain,
+		resolvedIds: this.resolvedIds
+	};
+};
+
+Module.prototype.trace = function trace ( name ) {
+	// TODO this is slightly circular
+	if ( name in this.scope.declarations ) {
+		return this.scope.declarations[ name ];
+	}
+
+	if ( name in this.imports ) {
+		var importDeclaration = this.imports[ name ];
+			var otherModule = importDeclaration.module;
+
+		if ( importDeclaration.name === '*' && !otherModule.isExternal ) {
+			return otherModule.namespace();
+		}
+
+		var declaration = otherModule.traceExport( importDeclaration.name );
+
+		if ( !declaration ) {
+			this.error({
+				code: 'MISSING_EXPORT',
+				message: ("'" + (importDeclaration.name) + "' is not exported by " + (relativeId( otherModule.id ))),
+				url: "https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module"
+			}, importDeclaration.specifier.start );
+		}
+
+		return declaration;
+	}
+
+	return null;
+};
+
+Module.prototype.traceExport = function traceExport ( name ) {
+		var this$1 = this;
+
+	// export { foo } from './other.js'
+	var reexportDeclaration = this.reexports[ name ];
+	if ( reexportDeclaration ) {
+		var declaration = reexportDeclaration.module.traceExport( reexportDeclaration.localName );
+
+		if ( !declaration ) {
+			this.error({
+				code: 'MISSING_EXPORT',
+				message: ("'" + (reexportDeclaration.localName) + "' is not exported by " + (relativeId( reexportDeclaration.module.id ))),
+				url: "https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module"
+			}, reexportDeclaration.start );
+		}
+
+		return declaration;
+	}
+
+	var exportDeclaration = this.exports[ name ];
+	if ( exportDeclaration ) {
+		var name$1 = exportDeclaration.localName;
+		var declaration$1 = this.trace( name$1 );
+
+		return declaration$1 || this.bundle.scope.findDeclaration( name$1 );
+	}
+
+	if ( name === 'default' ) return;
+
+	for ( var i = 0; i < this.exportAllModules.length; i += 1 ) {
+		var module = this$1.exportAllModules[i];
+		var declaration$2 = module.traceExport( name );
+
+		if ( declaration$2 ) return declaration$2;
+	}
+};
+
+Module.prototype.warn = function warn ( warning, pos ) {
+	if ( pos !== undefined ) {
+		warning.pos = pos;
+
+		var ref = locate( this.code, pos, { offsetLine: 1 });
+			var line = ref.line;
+			var column = ref.column; // TODO trace sourcemaps
+
+		warning.loc = { file: this.id, line: line, column: column };
+		warning.frame = getCodeFrame( this.code, line, column );
+	}
+
+	this.bundle.warn( warning );
+};
+
+var ExternalModule = function ExternalModule ( id, relativePath ) {
+	this.id = id;
+	this.path = relativePath;
+
+	this.name = makeLegalIdentifier( relativePath );
+
+	this.nameSuggestions = blank();
+	this.mostCommonSuggestion = 0;
+
+	this.isExternal = true;
+	this.declarations = blank();
+
+	this.exportsNames = false;
+};
+
+ExternalModule.prototype.suggestName = function suggestName ( name ) {
+	if ( !this.nameSuggestions[ name ] ) this.nameSuggestions[ name ] = 0;
+	this.nameSuggestions[ name ] += 1;
+
+	if ( this.nameSuggestions[ name ] > this.mostCommonSuggestion ) {
+		this.mostCommonSuggestion = this.nameSuggestions[ name ];
+		this.name = name;
+	}
+};
+
+ExternalModule.prototype.traceExport = function traceExport ( name ) {
+	if ( name !== 'default' && name !== '*' ) this.exportsNames = true;
+	if ( name === '*' ) this.exportsNamespace = true;
+
+	return this.declarations[ name ] || (
+		this.declarations[ name ] = new ExternalDeclaration( this, name )
+	);
+};
+
+function getName ( x ) {
+	return x.name;
+}
+
+function quotePath ( x ) {
+	return ("'" + (x.path) + "'");
+}
+
+function req ( x ) {
+	return ("require('" + (x.path) + "')");
+}
+
+function getInteropBlock ( bundle, options ) {
+	return bundle.externalModules
+		.map( function (module) {
+			if ( !module.declarations.default || options.interop === false ) return null;
+
+			if ( module.exportsNamespace ) {
+				return ((bundle.varOrConst) + " " + (module.name) + "__default = " + (module.name) + "['default'];");
+			}
+
+			if ( module.exportsNames ) {
+				return ((bundle.varOrConst) + " " + (module.name) + "__default = 'default' in " + (module.name) + " ? " + (module.name) + "['default'] : " + (module.name) + ";");
+			}
+
+			return ((module.name) + " = 'default' in " + (module.name) + " ? " + (module.name) + "['default'] : " + (module.name) + ";");
+		})
+		.filter( Boolean )
+		.join( '\n' );
+}
+
+function getExportBlock ( bundle, exportMode, mechanism ) {
+	if ( mechanism === void 0 ) mechanism = 'return';
+
+	var entryModule = bundle.entryModule;
+
+	if ( exportMode === 'default' ) {
+		return (mechanism + " " + (entryModule.traceExport( 'default' ).getName( false )) + ";");
+	}
+
+	return entryModule.getExports()
+		.map( function (name) {
+			if ( name[0] === '*' ) {
+				// export all from external
+				var id = name.slice( 1 );
+				var module = bundle.moduleById.get( id );
+
+				return ("Object.keys(" + (module.name) + ").forEach(function (key) { exports[key] = " + (module.name) + "[key]; });");
+			}
+
+			var prop = name === 'default' ? "['default']" : ("." + name);
+			var declaration = entryModule.traceExport( name );
+
+			var lhs = "exports" + prop;
+			var rhs = declaration ?
+				declaration.getName( false ) :
+				name; // exporting a global
+
+			// prevent `exports.count = exports.count`
+			if ( lhs === rhs ) return null;
+
+			return (lhs + " = " + rhs + ";");
+		})
+		.filter( Boolean )
+		.join( '\n' );
+}
+
+var esModuleExport = "Object.defineProperty(exports, '__esModule', { value: true });";
+
+var builtins$1 = {
+	process: true,
+	events: true,
+	stream: true,
+	util: true,
+	path: true,
+	buffer: true,
+	querystring: true,
+	url: true,
+	string_decoder: true,
+	punycode: true,
+	http: true,
+	https: true,
+	os: true,
+	assert: true,
+	constants: true,
+	timers: true,
+	console: true,
+	vm: true,
+	zlib: true,
+	tty: true,
+	domain: true
+};
+
+// Creating a browser bundle that depends on Node.js built-in modules ('util'). You might need to include https://www.npmjs.com/package/rollup-plugin-node-builtins
+
+function warnOnBuiltins ( bundle ) {
+	var externalBuiltins = bundle.externalModules
+		.filter( function (mod) { return mod.id in builtins$1; } )
+		.map( function (mod) { return mod.id; } );
+
+	if ( !externalBuiltins.length ) return;
+
+	var detail = externalBuiltins.length === 1 ?
+		("module ('" + (externalBuiltins[0]) + "')") :
+		("modules (" + (externalBuiltins.slice( 0, -1 ).map( function (name) { return ("'" + name + "'"); } ).join( ', ' )) + " and '" + (externalBuiltins.pop()) + "')");
+
+	bundle.warn({
+		code: 'MISSING_NODE_BUILTINS',
+		message: ("Creating a browser bundle that depends on Node.js built-in " + detail + ". You might need to include https://www.npmjs.com/package/rollup-plugin-node-builtins")
+	});
+}
+
+function amd ( bundle, magicString, ref, options ) {
+	var exportMode = ref.exportMode;
+	var indentString = ref.indentString;
+	var intro = ref.intro;
+	var outro = ref.outro;
+
+	warnOnBuiltins( bundle );
+	var deps = bundle.externalModules.map( quotePath );
+	var args = bundle.externalModules.map( getName );
+
+	if ( exportMode === 'named' ) {
+		args.unshift( "exports" );
+		deps.unshift( "'exports'" );
+	}
+
+	var params =
+		( options.moduleId ? ("'" + (options.moduleId) + "', ") : "" ) +
+		( deps.length ? ("[" + (deps.join( ', ' )) + "], ") : "" );
+
+	var useStrict = options.useStrict !== false ? " 'use strict';" : "";
+	var wrapperStart = "define(" + params + "function (" + (args.join( ', ' )) + ") {" + useStrict + "\n\n";
+
+	// var foo__default = 'default' in foo ? foo['default'] : foo;
+	var interopBlock = getInteropBlock( bundle, options );
+	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
+
+	if ( intro ) magicString.prepend( intro );
+
+	var exportBlock = getExportBlock( bundle, exportMode );
+	if ( exportBlock ) magicString.append( '\n\n' + exportBlock );
+	if ( exportMode === 'named' && options.legacy !== true ) magicString.append( ("\n\n" + esModuleExport) );
+	if ( outro ) magicString.append( outro );
+
+	return magicString
+		.indent( indentString )
+		.append( '\n\n});' )
+		.prepend( wrapperStart );
+}
+
+function cjs ( bundle, magicString, ref, options ) {
+	var exportMode = ref.exportMode;
+	var intro = ref.intro;
+	var outro = ref.outro;
+
+	intro = ( options.useStrict === false ? intro : ("'use strict';\n\n" + intro) ) +
+	        ( exportMode === 'named' && options.legacy !== true ? (esModuleExport + "\n\n") : '' );
+
+	var needsInterop = false;
+
+	var varOrConst = bundle.varOrConst;
+	var interop = options.interop !== false;
+
+	// TODO handle empty imports, once they're supported
+	var importBlock = bundle.externalModules
+		.map( function (module) {
+			if ( interop && module.declarations.default ) {
+				if ( module.exportsNamespace ) {
+					return varOrConst + " " + (module.name) + " = require('" + (module.path) + "');" +
+						"\n" + varOrConst + " " + (module.name) + "__default = " + (module.name) + "['default'];";
+				}
+
+				needsInterop = true;
+
+				if ( module.exportsNames ) {
+					return varOrConst + " " + (module.name) + " = require('" + (module.path) + "');" +
+						"\n" + varOrConst + " " + (module.name) + "__default = _interopDefault(" + (module.name) + ");";
+				}
+
+				return (varOrConst + " " + (module.name) + " = _interopDefault(require('" + (module.path) + "'));");
+			} else {
+				var activated = Object.keys( module.declarations )
+					.filter( function (name) { return module.declarations[ name ].activated; } );
+
+				return activated.length ?
+					(varOrConst + " " + (module.name) + " = require('" + (module.path) + "');") :
+					("require('" + (module.path) + "');");
+			}
+		})
+		.join( '\n' );
+
+	if ( needsInterop ) {
+		intro += "function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }\n\n";
+	}
+
+	if ( importBlock ) {
+		intro += importBlock + '\n\n';
+	}
+
+	magicString.prepend( intro );
+
+	var exportBlock = getExportBlock( bundle, exportMode, 'module.exports =' );
+	if ( exportBlock ) magicString.append( '\n\n' + exportBlock );
+	if ( outro ) magicString.append( outro );
+
+	return magicString;
+}
+
+function notDefault ( name ) {
+	return name !== 'default';
+}
+
+function es ( bundle, magicString, ref ) {
+	var intro = ref.intro;
+	var outro = ref.outro;
+
+	var importBlock = bundle.externalModules
+		.filter( function (module) {
+			var imported = keys( module.declarations );
+			return imported.length !== 1 || imported[0][0] !== '*';
+		})
+		.map( function (module) {
+			var specifiers = [];
+			var specifiersList = [specifiers];
+			var importedNames = keys( module.declarations )
+				.filter( function (name) { return name !== '*' && name !== 'default'; } )
+				.filter( function (name) { return module.declarations[ name ].activated; } )
+				.map( function (name) {
+					if ( name[0] === '*' ) {
+						return ("* as " + (module.name));
+					}
+
+					var declaration = module.declarations[ name ];
+
+					if ( declaration.name === declaration.safeName ) return declaration.name;
+					return ((declaration.name) + " as " + (declaration.safeName));
+				})
+				.filter( Boolean );
+
+			if ( module.declarations.default ) {
+				if ( module.exportsNamespace ) {
+					specifiersList.push([ ((module.name) + "__default") ]);
+				} else {
+					specifiers.push( module.name );
+				}
+			}
+
+			var namespaceSpecifier = module.declarations['*'] ? ("* as " + (module.name)) : null; // TODO prevent unnecessary namespace import, e.g form/external-imports
+			var namedSpecifier = importedNames.length ? ("{ " + (importedNames.sort().join( ', ' )) + " }") : null;
+
+			if ( namespaceSpecifier && namedSpecifier ) {
+				// Namespace and named specifiers cannot be combined.
+				specifiersList.push( [namespaceSpecifier] );
+				specifiers.push( namedSpecifier );
+			} else if ( namedSpecifier ) {
+				specifiers.push( namedSpecifier );
+			} else if ( namespaceSpecifier ) {
+				specifiers.push( namespaceSpecifier );
+			}
+
+			return specifiersList
+				.map( function (specifiers) { return specifiers.length ?
+						("import " + (specifiers.join( ', ' )) + " from '" + (module.path) + "';") :
+						("import '" + (module.path) + "';"); }
+				)
+				.join( '\n' );
+		})
+		.join( '\n' );
+
+	if ( importBlock ) intro += importBlock + '\n\n';
+	if ( intro ) magicString.prepend( intro );
+
+	var module = bundle.entryModule;
+
+	var exportAllDeclarations = [];
+
+	var specifiers = module.getExports()
+		.filter( notDefault )
+		.map( function (name) {
+			var declaration = module.traceExport( name );
+			var rendered = declaration.getName( true );
+
+			if ( name[0] === '*' ) {
+				// export * from 'external'
+				exportAllDeclarations.push( ("export * from '" + (name.slice( 1 )) + "';") );
+				return;
+			}
+
+			return rendered === name ?
+				name :
+				(rendered + " as " + name);
+		})
+		.filter( Boolean );
+
+	var exportBlock = specifiers.length ? ("export { " + (specifiers.join(', ')) + " };") : '';
+
+	var defaultExport = module.exports.default || module.reexports.default;
+	if ( defaultExport ) {
+		exportBlock += "export default " + (module.traceExport( 'default' ).getName( true )) + ";";
+	}
+
+	if ( exportBlock ) magicString.append( '\n\n' + exportBlock.trim() );
+	if ( exportAllDeclarations.length ) magicString.append( '\n\n' + exportAllDeclarations.join( '\n' ).trim() );
+	if ( outro ) magicString.append( outro );
+
+	return magicString.trim();
+}
+
+function getGlobalNameMaker ( globals, bundle, fallback ) {
+	if ( fallback === void 0 ) fallback = null;
+
+	var fn = typeof globals === 'function' ? globals : function (id) { return globals[ id ]; };
+
+	return function ( module ) {
+		var name = fn( module.id );
+		if ( name ) return name;
+
+		if ( Object.keys( module.declarations ).length > 0 ) {
+			bundle.warn({
+				code: 'MISSING_GLOBAL_NAME',
+				message: ("No name was provided for external module '" + (module.id) + "' in options.globals – guessing '" + (module.name) + "'")
+			});
+
+			return module.name;
+		}
+
+		return fallback;
+	};
+}
+
+// Generate strings which dereference dotted properties, but use array notation `['prop-deref']`
+// if the property name isn't trivial
+var shouldUseDot = /^[a-zA-Z$_][a-zA-Z0-9$_]*$/;
+
+function property ( prop ) {
+	return shouldUseDot.test( prop ) ? ("." + prop) : ("['" + prop + "']");
+}
+
+function keypath ( keypath ) {
+	return keypath.split( '.' ).map( property ).join( '' );
+}
+
+function trimEmptyImports ( modules ) {
+	var i = modules.length;
+
+	while ( i-- ) {
+		var module = modules[i];
+		if ( Object.keys( module.declarations ).length > 0 ) {
+			return modules.slice( 0, i + 1 );
+		}
+	}
+
+	return [];
+}
+
+function setupNamespace ( keypath$$1 ) {
+	var parts = keypath$$1.split( '.' );
+
+	parts.pop();
+
+	var acc = 'this';
+
+	return parts
+		.map( function (part) { return ( acc += property( part ), (acc + " = " + acc + " || {};") ); } )
+		.join( '\n' ) + '\n';
+}
+
+var thisProp = function (name) { return ("this" + (keypath( name ))); };
+
+function iife ( bundle, magicString, ref, options ) {
+	var exportMode = ref.exportMode;
+	var indentString = ref.indentString;
+	var intro = ref.intro;
+	var outro = ref.outro;
+
+	var globalNameMaker = getGlobalNameMaker( options.globals || blank(), bundle, 'null' );
+
+	var name = options.moduleName;
+	var isNamespaced = name && ~name.indexOf( '.' );
+
+	warnOnBuiltins( bundle );
+
+	var external = trimEmptyImports( bundle.externalModules );
+	var dependencies = external.map( globalNameMaker );
+	var args = external.map( getName );
+
+	if ( exportMode !== 'none' && !name ) {
+		error({
+			code: 'INVALID_OPTION',
+			message: "You must supply options.moduleName for IIFE bundles"
+		});
+	}
+
+	if ( exportMode === 'named' ) {
+		dependencies.unshift( ("(" + (thisProp(name)) + " = " + (thisProp(name)) + " || {})") );
+		args.unshift( 'exports' );
+	}
+
+	var useStrict = options.useStrict !== false ? (indentString + "'use strict';\n\n") : "";
+
+	var wrapperIntro = "(function (" + args + ") {\n" + useStrict;
+	var wrapperOutro = "\n\n}(" + dependencies + "));";
+
+	if ( exportMode === 'default' ) {
+		wrapperIntro = ( isNamespaced ? thisProp(name) : ((bundle.varOrConst) + " " + name) ) + " = " + wrapperIntro;
+	}
+
+	if ( isNamespaced ) {
+		wrapperIntro = setupNamespace( name ) + wrapperIntro;
+	}
+
+	// var foo__default = 'default' in foo ? foo['default'] : foo;
+	var interopBlock = getInteropBlock( bundle, options );
+	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
+
+	if ( intro ) magicString.prepend( intro );
+
+	var exportBlock = getExportBlock( bundle, exportMode );
+	if ( exportBlock ) magicString.append( '\n\n' + exportBlock );
+	if ( outro ) magicString.append( outro );
+
+	return magicString
+		.indent( indentString )
+		.prepend( wrapperIntro )
+		.append( wrapperOutro );
+}
+
+function globalProp ( name ) {
+	if ( !name ) return 'null';
+	return ("global" + (keypath( name )));
+}
+
+function setupNamespace$1 ( name ) {
+	var parts = name.split( '.' );
+	var last = property( parts.pop() );
+
+	var acc = 'global';
+	return parts
+		.map( function (part) { return ( acc += property( part ), (acc + " = " + acc + " || {}") ); } )
+		.concat( ("" + acc + last) )
+		.join( ', ' );
+}
+
+var wrapperOutro = '\n\n})));';
+
+function umd ( bundle, magicString, ref, options ) {
+	var exportMode = ref.exportMode;
+	var indentString = ref.indentString;
+	var intro = ref.intro;
+	var outro = ref.outro;
+
+	if ( exportMode !== 'none' && !options.moduleName ) {
+		error({
+			code: 'INVALID_OPTION',
+			message: 'You must supply options.moduleName for UMD bundles'
+		});
+	}
+
+	warnOnBuiltins( bundle );
+
+	var globalNameMaker = getGlobalNameMaker( options.globals || blank(), bundle );
+
+	var amdDeps = bundle.externalModules.map( quotePath );
+	var cjsDeps = bundle.externalModules.map( req );
+
+	var trimmed = trimEmptyImports( bundle.externalModules );
+	var globalDeps = trimmed.map( function (module) { return globalProp( globalNameMaker( module ) ); } );
+	var args = trimmed.map( getName );
+
+	if ( exportMode === 'named' ) {
+		amdDeps.unshift( "'exports'" );
+		cjsDeps.unshift( "exports" );
+		globalDeps.unshift( ("(" + (setupNamespace$1(options.moduleName)) + " = " + (globalProp(options.moduleName)) + " || {})") );
+
+		args.unshift( 'exports' );
+	}
+
+	var amdParams =
+		( options.moduleId ? ("'" + (options.moduleId) + "', ") : "" ) +
+		( amdDeps.length ? ("[" + (amdDeps.join( ', ' )) + "], ") : "" );
+
+	var cjsExport = exportMode === 'default' ? "module.exports = " : "";
+	var defaultExport = exportMode === 'default' ? ((setupNamespace$1(options.moduleName)) + " = ") : '';
+
+	var useStrict = options.useStrict !== false ? " 'use strict';" : "";
+
+	var globalExport = options.noConflict === true ?
+		("(function() {\n\t\t\t\tvar current = " + (globalProp(options.moduleName)) + ";\n\t\t\t\tvar exports = factory(" + globalDeps + ");\n\t\t\t\t" + (globalProp(options.moduleName)) + " = exports;\n\t\t\t\texports.noConflict = function() { " + (globalProp(options.moduleName)) + " = current; return exports; };\n\t\t\t})()") : ("(" + defaultExport + "factory(" + globalDeps + "))");
+
+	var wrapperIntro =
+		("(function (global, factory) {\n\t\t\ttypeof exports === 'object' && typeof module !== 'undefined' ? " + cjsExport + "factory(" + (cjsDeps.join( ', ' )) + ") :\n\t\t\ttypeof define === 'function' && define.amd ? define(" + amdParams + "factory) :\n\t\t\t" + globalExport + ";\n\t\t}(this, (function (" + args + ") {" + useStrict + "\n\n\t\t").replace( /^\t\t/gm, '' ).replace( /^\t/gm, magicString.getIndentString() );
+
+	// var foo__default = 'default' in foo ? foo['default'] : foo;
+	var interopBlock = getInteropBlock( bundle, options );
+	if ( interopBlock ) magicString.prepend( interopBlock + '\n\n' );
+
+	if ( intro ) magicString.prepend( intro );
+
+	var exportBlock = getExportBlock( bundle, exportMode );
+	if ( exportBlock ) magicString.append( '\n\n' + exportBlock );
+	if ( exportMode === 'named' && options.legacy !== true ) magicString.append( ("\n\n" + esModuleExport) );
+	if ( outro ) magicString.append( outro );
+
+	return magicString
+		.trim()
+		.indent( indentString )
+		.append( wrapperOutro )
+		.prepend( wrapperIntro );
+}
+
+var finalisers = { amd: amd, cjs: cjs, es: es, iife: iife, umd: umd };
+
+function ensureArray ( thing ) {
+	if ( Array.isArray( thing ) ) return thing;
+	if ( thing == undefined ) return [];
+	return [ thing ];
+}
+
+function load ( id ) {
+	return readFileSync( id, 'utf-8' );
+}
+
+function findFile ( file ) {
+	try {
+		var stats = lstatSync( file );
+		if ( stats.isSymbolicLink() ) return findFile( realpathSync( file ) );
+		if ( stats.isFile() ) {
+			// check case
+			var name = basename( file );
+			var files = readdirSync( dirname( file ) );
+
+			if ( ~files.indexOf( name ) ) return file;
+		}
+	} catch ( err ) {
+		// suppress
+	}
+}
+
+function addJsExtensionIfNecessary ( file ) {
+	return findFile( file ) || findFile( file + '.js' );
+}
+
+function resolveId ( importee, importer ) {
+	if ( typeof process === 'undefined' ) {
+		error({
+			code: 'MISSING_PROCESS',
+			message: "It looks like you're using Rollup in a non-Node.js environment. This means you must supply a plugin with custom resolveId and load functions",
+			url: 'https://github.com/rollup/rollup/wiki/Plugins'
+		});
+	}
+
+	// absolute paths are left untouched
+	if ( isAbsolute( importee ) ) return addJsExtensionIfNecessary( resolve( importee ) );
+
+	// if this is the entry point, resolve against cwd
+	if ( importer === undefined ) return addJsExtensionIfNecessary( resolve( process.cwd(), importee ) );
+
+	// external modules are skipped at this stage
+	if ( importee[0] !== '.' ) return null;
+
+	return addJsExtensionIfNecessary( resolve( dirname( importer ), importee ) );
+}
+
+
+function makeOnwarn () {
+	var warned = blank();
+
+	return function (warning) {
+		var str = warning.toString();
+		if ( str in warned ) return;
+		console.error( str ); //eslint-disable-line no-console
+		warned[ str ] = true;
+	};
+}
+
+function badExports ( option, keys$$1 ) {
+	error({
+		code: 'INVALID_EXPORT_OPTION',
+		message: ("'" + option + "' was specified for options.exports, but entry module has following exports: " + (keys$$1.join(', ')))
+	});
+}
+
+function getExportMode ( bundle, ref ) {
+	var exportMode = ref.exports;
+	var moduleName = ref.moduleName;
+	var format = ref.format;
+
+	var exportKeys = keys( bundle.entryModule.exports )
+		.concat( keys( bundle.entryModule.reexports ) )
+		.concat( bundle.entryModule.exportAllSources ); // not keys, but makes our job easier this way
+
+	if ( exportMode === 'default' ) {
+		if ( exportKeys.length !== 1 || exportKeys[0] !== 'default' ) {
+			badExports( 'default', exportKeys );
+		}
+	} else if ( exportMode === 'none' && exportKeys.length ) {
+		badExports( 'none', exportKeys );
+	}
+
+	if ( !exportMode || exportMode === 'auto' ) {
+		if ( exportKeys.length === 0 ) {
+			exportMode = 'none';
+		} else if ( exportKeys.length === 1 && exportKeys[0] === 'default' ) {
+			exportMode = 'default';
+		} else {
+			if ( bundle.entryModule.exports.default && format !== 'es') {
+				bundle.warn({
+					code: 'MIXED_EXPORTS',
+					message: ("Using named and default exports together. Consumers of your bundle will have to use " + (moduleName || 'bundle') + "['default'] to access the default export, which may not be what you want. Use `exports: 'named'` to disable this warning"),
+					url: "https://github.com/rollup/rollup/wiki/JavaScript-API#exports"
+				});
+			}
+			exportMode = 'named';
+		}
+	}
+
+	if ( !/(?:default|named|none)/.test( exportMode ) ) {
+		error({
+			code: 'INVALID_EXPORT_OPTION',
+			message: "options.exports must be 'default', 'named', 'none', 'auto', or left unspecified (defaults to 'auto')"
+		});
+	}
+
+	return exportMode;
+}
+
+function getIndentString ( magicString, options ) {
+	if ( options.indent === true ) {
+		return magicString.getIndentString();
+	}
+
+	return options.indent || '';
+}
+
+function transform ( bundle, source, id, plugins ) {
+	var sourceMapChain = [];
+
+	var originalSourceMap = typeof source.map === 'string' ? JSON.parse( source.map ) : source.map;
+
+	if ( originalSourceMap && typeof originalSourceMap.mappings === 'string' ) {
+		originalSourceMap.mappings = decode( originalSourceMap.mappings );
+	}
+
+	var originalCode = source.code;
+	var ast = source.ast;
+
+	var promise = Promise.resolve( source.code );
+
+	plugins.forEach( function (plugin) {
+		if ( !plugin.transform ) return;
+
+		promise = promise.then( function (previous) {
+			function augment ( object, pos, code ) {
+				if ( typeof object === 'string' ) {
+					object = { message: object };
+				}
+
+				if ( !object.code ) object.code = code;
+
+				if ( pos !== undefined ) {
+					object.pos = pos;
+					var ref = locate( previous, pos, { offsetLine: 1 });
+					var line = ref.line;
+					var column = ref.column;
+					object.loc = { file: id, line: line, column: column };
+					object.frame = getCodeFrame( previous, line, column );
+				}
+
+				return object;
+			}
+
+			var err;
+
+			var context = {
+				warn: function ( warning, pos ) {
+					warning = augment( warning, pos, 'PLUGIN_WARNING' );
+					warning.plugin = plugin.name;
+					warning.id = id;
+					bundle.warn( warning );
+				},
+
+				error: function error$1 ( e, pos ) {
+					err = augment( e, pos, 'PLUGIN_ERROR' );
+				}
+			};
+
+			var transformed;
+
+			try {
+				transformed = plugin.transform.call( context, previous, id );
+			} catch ( err ) {
+				context.error( err );
+			}
+
+			return Promise.resolve( transformed )
+				.then( function (result) {
+					if ( err ) throw err;
+
+					if ( result == null ) return previous;
+
+					if ( typeof result === 'string' ) {
+						result = {
+							code: result,
+							ast: null,
+							map: null
+						};
+					}
+
+					// `result.map` can only be a string if `result` isn't
+					else if ( typeof result.map === 'string' ) {
+						result.map = JSON.parse( result.map );
+					}
+
+					if ( result.map && typeof result.map.mappings === 'string' ) {
+						result.map.mappings = decode( result.map.mappings );
+					}
+
+					sourceMapChain.push( result.map || { missing: true, plugin: plugin.name }); // lil' bit hacky but it works
+					ast = result.ast;
+
+					return result.code;
+				})
+				.catch( function (err) {
+					err.plugin = plugin.name;
+					err.id = id;
+					error( err );
+				});
+		});
+	});
+
+	return promise.then( function (code) { return ({ code: code, originalCode: originalCode, originalSourceMap: originalSourceMap, ast: ast, sourceMapChain: sourceMapChain }); } );
+}
+
+function transformBundle ( code, plugins, sourceMapChain, options ) {
+	return plugins.reduce( function ( code, plugin ) {
+		if ( !plugin.transformBundle ) return code;
+
+		var result;
+
+		try {
+			result = plugin.transformBundle( code, { format : options.format } );
+		} catch ( err ) {
+			error({
+				code: 'BAD_BUNDLE_TRANSFORMER',
+				message: ("Error transforming bundle" + (plugin.name ? (" with '" + (plugin.name) + "' plugin") : '') + ": " + (err.message)),
+				plugin: plugin.name
+			});
+		}
+
+		if ( result == null ) return code;
+
+		if ( typeof result === 'string' ) {
+			result = {
+				code: result,
+				map: null
+			};
+		}
+
+		var map = typeof result.map === 'string' ? JSON.parse( result.map ) : result.map;
+		if ( map && typeof map.mappings === 'string' ) {
+			map.mappings = decode( map.mappings );
+		}
+
+		sourceMapChain.push( map );
+
+		return result.code;
+	}, code );
+}
+
+var Source = function Source ( filename, content ) {
+	this.isOriginal = true;
+	this.filename = filename;
+	this.content = content;
+};
+
+Source.prototype.traceSegment = function traceSegment ( line, column, name ) {
+	return { line: line, column: column, name: name, source: this };
+};
+
+var Link = function Link ( map, sources ) {
+	this.sources = sources;
+	this.names = map.names;
+	this.mappings = map.mappings;
+};
+
+Link.prototype.traceMappings = function traceMappings () {
+		var this$1 = this;
+
+	var sources = [];
+	var sourcesContent = [];
+	var names = [];
+
+	var mappings = this.mappings.map( function (line) {
+		var tracedLine = [];
+
+		line.forEach( function (segment) {
+			var source = this$1.sources[ segment[1] ];
+			var traced = source.traceSegment( segment[2], segment[3], this$1.names[ segment[4] ] );
+
+			if ( traced ) {
+				var sourceIndex = null;
+				var nameIndex = null;
+				segment = [
+					segment[0],
+					null,
+					traced.line,
+					traced.column
+				];
+
+				// newer sources are more likely to be used, so search backwards.
+				sourceIndex = sources.lastIndexOf( traced.source.filename );
+				if ( sourceIndex === -1 ) {
+					sourceIndex = sources.length;
+					sources.push( traced.source.filename );
+					sourcesContent[ sourceIndex ] = traced.source.content;
+				} else if ( sourcesContent[ sourceIndex ] == null ) {
+					sourcesContent[ sourceIndex ] = traced.source.content;
+				} else if ( traced.source.content != null && sourcesContent[ sourceIndex ] !== traced.source.content ) {
+					error({
+						message: ("Multiple conflicting contents for sourcemap source " + (source.filename))
+					});
+				}
+
+				segment[1] = sourceIndex;
+
+				if ( traced.name ) {
+					nameIndex = names.indexOf( traced.name );
+					if ( nameIndex === -1 ) {
+						nameIndex = names.length;
+						names.push( traced.name );
+					}
+
+					segment[4] = nameIndex;
+				}
+
+				tracedLine.push( segment );
+			}
+		});
+
+		return tracedLine;
+	});
+
+	return { sources: sources, sourcesContent: sourcesContent, names: names, mappings: mappings };
+};
+
+Link.prototype.traceSegment = function traceSegment ( line, column, name ) {
+		var this$1 = this;
+
+	var segments = this.mappings[ line ];
+
+	if ( !segments ) return null;
+
+	for ( var i = 0; i < segments.length; i += 1 ) {
+		var segment = segments[i];
+
+		if ( segment[0] > column ) return null;
+
+		if ( segment[0] === column ) {
+			var source = this$1.sources[ segment[1] ];
+			if ( !source ) return null;
+
+			return source.traceSegment( segment[2], segment[3], this$1.names[ segment[4] ] || name );
+		}
+	}
+
+	return null;
+};
+
+function collapseSourcemaps ( bundle, file, map, modules, bundleSourcemapChain ) {
+	var moduleSources = modules.filter( function (module) { return !module.excludeFromSourcemap; } ).map( function (module) {
+		var sourceMapChain = module.sourceMapChain;
+
+		var source;
+		if ( module.originalSourceMap == null ) {
+			source = new Source( module.id, module.originalCode );
+		} else {
+			var sources = module.originalSourceMap.sources;
+			var sourcesContent = module.originalSourceMap.sourcesContent || [];
+
+			if ( sources == null || ( sources.length <= 1 && sources[0] == null ) ) {
+				source = new Source( module.id, sourcesContent[0] );
+				sourceMapChain = [ module.originalSourceMap ].concat( sourceMapChain );
+			} else {
+				// TODO indiscriminately treating IDs and sources as normal paths is probably bad.
+				var directory = dirname( module.id ) || '.';
+				var sourceRoot = module.originalSourceMap.sourceRoot || '.';
+
+				var baseSources = sources.map( function (source, i) {
+					return new Source( resolve( directory, sourceRoot, source ), sourcesContent[i] );
+				});
+
+				source = new Link( module.originalSourceMap, baseSources );
+			}
+		}
+
+		sourceMapChain.forEach( function (map) {
+			if ( map.missing ) {
+				bundle.warn({
+					code: 'SOURCEMAP_BROKEN',
+					message: ("Sourcemap is likely to be incorrect: a plugin" + (map.plugin ? (" ('" + (map.plugin) + "')") : "") + " was used to transform files, but didn't generate a sourcemap for the transformation. Consult the plugin documentation for help"),
+					url: "https://github.com/rollup/rollup/wiki/Troubleshooting#sourcemap-is-likely-to-be-incorrect"
+				});
+
+				map = {
+					names: [],
+					mappings: ''
+				};
+			}
+
+			source = new Link( map, [ source ]);
+		});
+
+		return source;
+	});
+
+	var source = new Link( map, moduleSources );
+
+	bundleSourcemapChain.forEach( function (map) {
+		source = new Link( map, [ source ] );
+	});
+
+	var ref = source.traceMappings();
+	var sources = ref.sources;
+	var sourcesContent = ref.sourcesContent;
+	var names = ref.names;
+	var mappings = ref.mappings;
+
+	if ( file ) {
+		var directory = dirname( file );
+		sources = sources.map( function (source) { return relative( directory, source ); } );
+
+		map.file = basename( file );
+	}
+
+	// we re-use the `map` object because it has convenient toString/toURL methods
+	map.sources = sources;
+	map.sourcesContent = sourcesContent;
+	map.names = names;
+	map.mappings = encode( mappings );
+
+	return map;
+}
+
+function callIfFunction ( thing ) {
+	return typeof thing === 'function' ? thing() : thing;
+}
+
+var SyntheticGlobalDeclaration = function SyntheticGlobalDeclaration ( name ) {
+	this.name = name;
+	this.isExternal = true;
+	this.isGlobal = true;
+	this.isReassigned = false;
+
+	this.activated = true;
+};
+
+SyntheticGlobalDeclaration.prototype.activate = function activate () {
+	/* noop */
+};
+
+SyntheticGlobalDeclaration.prototype.addReference = function addReference ( reference ) {
+	reference.declaration = this;
+	if ( reference.isReassignment ) this.isReassigned = true;
+};
+
+SyntheticGlobalDeclaration.prototype.gatherPossibleValues = function gatherPossibleValues ( values ) {
+	values.add( UNKNOWN );
+};
+
+SyntheticGlobalDeclaration.prototype.getName = function getName () {
+	return this.name;
+};
+
+var BundleScope = (function (Scope$$1) {
+	function BundleScope () {
+		Scope$$1.apply(this, arguments);
+	}
+
+	if ( Scope$$1 ) BundleScope.__proto__ = Scope$$1;
+	BundleScope.prototype = Object.create( Scope$$1 && Scope$$1.prototype );
+	BundleScope.prototype.constructor = BundleScope;
+
+	BundleScope.prototype.findDeclaration = function findDeclaration ( name ) {
+		if ( !this.declarations[ name ] ) {
+			this.declarations[ name ] = new SyntheticGlobalDeclaration( name );
+		}
+
+		return this.declarations[ name ];
+	};
+
+	return BundleScope;
+}(Scope));
+
+var Bundle$$1 = function Bundle$$1 ( options ) {
+	var this$1 = this;
+
+	this.cachedModules = new Map();
+	if ( options.cache ) {
+		options.cache.modules.forEach( function (module) {
+			this$1.cachedModules.set( module.id, module );
+		});
+	}
+
+	this.plugins = ensureArray( options.plugins );
+
+	options = this.plugins.reduce( function ( acc, plugin ) {
+		if ( plugin.options ) return plugin.options( acc ) || acc;
+		return acc;
+	}, options);
+
+	this.entry = options.entry;
+	this.entryId = null;
+	this.entryModule = null;
+
+	this.treeshake = options.treeshake !== false;
+
+	this.resolveId = first(
+		[ function (id) { return this$1.isExternal( id ) ? false : null; } ]
+			.concat( this.plugins.map( function (plugin) { return plugin.resolveId; } ).filter( Boolean ) )
+			.concat( resolveId )
+	);
+
+	var loaders = this.plugins
+		.map( function (plugin) { return plugin.load; } )
+		.filter( Boolean );
+	this.hasLoaders = loaders.length !== 0;
+	this.load = first( loaders.concat( load ) );
+
+	this.getPath = typeof options.paths === 'function' ?
+		( function (id) { return options.paths( id ) || this$1.getPathRelativeToEntryDirname( id ); } ) :
+		options.paths ?
+			( function (id) { return options.paths.hasOwnProperty( id ) ? options.paths[ id ] : this$1.getPathRelativeToEntryDirname( id ); } ) :
+			function (id) { return this$1.getPathRelativeToEntryDirname( id ); };
+
+	this.scope = new BundleScope();
+	// TODO strictly speaking, this only applies with non-ES6, non-default-only bundles
+	[ 'module', 'exports', '_interopDefault' ].forEach( function (name) {
+		this$1.scope.findDeclaration( name ); // creates global declaration as side-effect
+	});
+
+	this.moduleById = new Map();
+	this.modules = [];
+	this.externalModules = [];
+
+	this.context = String( options.context );
+
+	if ( typeof options.moduleContext === 'function' ) {
+		this.getModuleContext = function (id) { return options.moduleContext( id ) || this$1.context; };
+	} else if ( typeof options.moduleContext === 'object' ) {
+		var moduleContext = new Map();
+		Object.keys( options.moduleContext ).forEach( function (key) {
+			moduleContext.set( resolve( key ), options.moduleContext[ key ] );
+		});
+		this.getModuleContext = function (id) { return moduleContext.get( id ) || this$1.context; };
+	} else {
+		this.getModuleContext = function () { return this$1.context; };
+	}
+
+	if ( typeof options.external === 'function' ) {
+		this.isExternal = options.external;
+	} else {
+		var ids = ensureArray( options.external );
+		this.isExternal = function (id) { return ids.indexOf( id ) !== -1; };
+	}
+
+	this.onwarn = options.onwarn || makeOnwarn();
+
+	this.varOrConst = options.preferConst ? 'const' : 'var';
+	this.legacy = options.legacy;
+	this.acornOptions = options.acorn || {};
+
+	this.dependentExpressions = [];
+};
+
+Bundle$$1.prototype.build = function build () {
+		var this$1 = this;
+
+	// Phase 1 – discovery. We load the entry module and find which
+	// modules it imports, and import those, until we have all
+	// of the entry module's dependencies
+	return this.resolveId( this.entry, undefined )
+		.then( function (id) {
+			if ( id == null ) {
+				error({
+					code: 'UNRESOLVED_ENTRY',
+					message: ("Could not resolve entry (" + (this$1.entry) + ")")
+				});
+			}
+
+			this$1.entryId = id;
+			return this$1.fetchModule( id, undefined );
+		})
+		.then( function (entryModule) {
+			this$1.entryModule = entryModule;
+
+			// Phase 2 – binding. We link references to their declarations
+			// to generate a complete picture of the bundle
+
+			timeStart( 'phase 2' );
+
+			this$1.modules.forEach( function (module) { return module.bindImportSpecifiers(); } );
+			this$1.modules.forEach( function (module) { return module.bindReferences(); } );
+
+			timeEnd( 'phase 2' );
+
+			// Phase 3 – marking. We 'run' each statement to see which ones
+			// need to be included in the generated bundle
+
+			timeStart( 'phase 3' );
+
+			// mark all export statements
+			entryModule.getExports().forEach( function (name) {
+				var declaration = entryModule.traceExport( name );
+
+				declaration.exportName = name;
+				declaration.activate();
+
+				if ( declaration.isNamespace ) {
+					declaration.needsNamespaceBlock = true;
+				}
+			});
+
+			// mark statements that should appear in the bundle
+			if ( this$1.treeshake ) {
+				this$1.modules.forEach( function (module) {
+					module.run();
+				});
+
+				var settled = false;
+				while ( !settled ) {
+					settled = true;
+
+					var i = this$1.dependentExpressions.length;
+					while ( i-- ) {
+						var expression = this$1.dependentExpressions[i];
+
+						var statement = expression;
+						while ( statement.parent && !/Function/.test( statement.parent.type ) ) statement = statement.parent;
+
+						if ( !statement || statement.ran ) {
+							this$1.dependentExpressions.splice( i, 1 );
+						} else if ( expression.isUsedByBundle() ) {
+							settled = false;
+							statement.run( statement.findScope() );
+							this$1.dependentExpressions.splice( i, 1 );
+						}
+					}
+				}
+			}
+
+			timeEnd( 'phase 3' );
+
+			// Phase 4 – final preparation. We order the modules with an
+			// enhanced topological sort that accounts for cycles, then
+			// ensure that names are deconflicted throughout the bundle
+
+			timeStart( 'phase 4' );
+
+			// while we're here, check for unused external imports
+			this$1.externalModules.forEach( function (module) {
+				var unused = Object.keys( module.declarations )
+					.filter( function (name) { return name !== '*'; } )
+					.filter( function (name) { return !module.declarations[ name ].activated; } );
+
+				if ( unused.length === 0 ) return;
+
+				var names = unused.length === 1 ?
+					("'" + (unused[0]) + "' is") :
+					((unused.slice( 0, -1 ).map( function (name) { return ("'" + name + "'"); } ).join( ', ' )) + " and '" + (unused.pop()) + "' are");
+
+				this$1.warn({
+					code: 'UNUSED_EXTERNAL_IMPORT',
+					message: (names + " imported from external module '" + (module.id) + "' but never used")
+				});
+			});
+
+			this$1.orderedModules = this$1.sort();
+			this$1.deconflict();
+
+			timeEnd( 'phase 4' );
+		});
+};
+
+Bundle$$1.prototype.deconflict = function deconflict () {
+	var used = blank();
+
+	// ensure no conflicts with globals
+	keys( this.scope.declarations ).forEach( function (name) { return used[ name ] = 1; } );
+
+	function getSafeName ( name ) {
+		while ( used[ name ] ) {
+			name += "$" + (used[name]++);
+		}
+
+		used[ name ] = 1;
+		return name;
+	}
+
+	var toDeshadow = new Set();
+
+	this.externalModules.forEach( function (module) {
+		var safeName = getSafeName( module.name );
+		toDeshadow.add( safeName );
+		module.name = safeName;
+
+		// ensure we don't shadow named external imports, if
+		// we're creating an ES6 bundle
+		forOwn( module.declarations, function ( declaration, name ) {
+			var safeName = getSafeName( name );
+			toDeshadow.add( safeName );
+			declaration.setSafeName( safeName );
+		});
+	});
+
+	this.modules.forEach( function (module) {
+		forOwn( module.scope.declarations, function ( declaration ) {
+			if ( declaration.isDefault && declaration.declaration.id ) {
+				return;
+			}
+
+			declaration.name = getSafeName( declaration.name );
+		});
+
+		// deconflict reified namespaces
+		var namespace = module.namespace();
+		if ( namespace.needsNamespaceBlock ) {
+			namespace.name = getSafeName( namespace.name );
+		}
+	});
+
+	this.scope.deshadow( toDeshadow );
+};
+
+Bundle$$1.prototype.fetchModule = function fetchModule ( id, importer ) {
+		var this$1 = this;
+
+	// short-circuit cycles
+	if ( this.moduleById.has( id ) ) return null;
+	this.moduleById.set( id, null );
+
+	return this.load( id )
+		.catch( function (err) {
+			var msg = "Could not load " + id;
+			if ( importer ) msg += " (imported by " + importer + ")";
+
+			msg += ": " + (err.message);
+			throw new Error( msg );
+		})
+		.then( function (source) {
+			if ( typeof source === 'string' ) return source;
+			if ( source && typeof source === 'object' && source.code ) return source;
+
+			// TODO report which plugin failed
+			error({
+				code: 'BAD_LOADER',
+				message: ("Error loading " + (relativeId( id )) + ": plugin load hook should return a string, a { code, map } object, or nothing/null")
+			});
+		})
+		.then( function (source) {
+			if ( typeof source === 'string' ) {
+				source = {
+					code: source,
+					ast: null
+				};
+			}
+
+			if ( this$1.cachedModules.has( id ) && this$1.cachedModules.get( id ).originalCode === source.code ) {
+				return this$1.cachedModules.get( id );
+			}
+
+			return transform( this$1, source, id, this$1.plugins );
+		})
+		.then( function (source) {
+			var code = source.code;
+				var originalCode = source.originalCode;
+				var originalSourceMap = source.originalSourceMap;
+				var ast = source.ast;
+				var sourceMapChain = source.sourceMapChain;
+				var resolvedIds = source.resolvedIds;
+
+			var module = new Module({
+				id: id,
+				code: code,
+				originalCode: originalCode,
+				originalSourceMap: originalSourceMap,
+				ast: ast,
+				sourceMapChain: sourceMapChain,
+					resolvedIds: resolvedIds,
+				bundle: this$1
+			});
+
+			this$1.modules.push( module );
+			this$1.moduleById.set( id, module );
+
+			return this$1.fetchAllDependencies( module ).then( function () {
+				keys( module.exports ).forEach( function (name) {
+					module.exportsAll[name] = module.id;
+				});
+				module.exportAllSources.forEach( function (source) {
+					var id = module.resolvedIds[ source ];
+					var exportAllModule = this$1.moduleById.get( id );
+					if ( exportAllModule.isExternal ) return;
+
+					keys( exportAllModule.exportsAll ).forEach( function (name) {
+						if ( name in module.exportsAll ) {
+							this$1.warn({
+								code: 'NAMESPACE_CONFLICT',
+								message: ("Conflicting namespaces: " + (relativeId( module.id )) + " re-exports '" + name + "' from both " + (relativeId( module.exportsAll[ name ] )) + " (will be ignored) and " + (relativeId( exportAllModule.exportsAll[ name ] )))
+							});
+						}
+						module.exportsAll[ name ] = exportAllModule.exportsAll[ name ];
+					});
+				});
+				return module;
+			});
+		});
+};
+
+Bundle$$1.prototype.fetchAllDependencies = function fetchAllDependencies ( module ) {
+		var this$1 = this;
+
+	return mapSequence( module.sources, function (source) {
+		var resolvedId = module.resolvedIds[ source ];
+		return ( resolvedId ? Promise.resolve( resolvedId ) : this$1.resolveId( source, module.id ) )
+			.then( function (resolvedId) {
+				var externalId = resolvedId || (
+					isRelative( source ) ? resolve( module.id, '..', source ) : source
+				);
+
+				var isExternal = this$1.isExternal( externalId );
+
+				if ( !resolvedId && !isExternal ) {
+					if ( isRelative( source ) ) {
+						error({
+							code: 'UNRESOLVED_IMPORT',
+							message: ("Could not resolve '" + source + "' from " + (relativeId( module.id )))
+						});
+					}
+
+					this$1.warn({
+						code: 'UNRESOLVED_IMPORT',
+						message: ("'" + source + "' is imported by " + (relativeId( module.id )) + ", but could not be resolved – treating it as an external dependency"),
+						url: 'https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency'
+					});
+					isExternal = true;
+				}
+
+				if ( isExternal ) {
+					module.resolvedIds[ source ] = externalId;
+
+					if ( !this$1.moduleById.has( externalId ) ) {
+						var module$1 = new ExternalModule( externalId, this$1.getPath( externalId ) );
+						this$1.externalModules.push( module$1 );
+						this$1.moduleById.set( externalId, module$1 );
+					}
+
+					var externalModule = this$1.moduleById.get( externalId );
+
+					// add external declarations so we can detect which are never used
+					Object.keys( module.imports ).forEach( function (name) {
+						var importDeclaration = module.imports[ name ];
+						if ( importDeclaration.source !== source ) return;
+
+						externalModule.traceExport( importDeclaration.name );
+					});
+				} else {
+					if ( resolvedId === module.id ) {
+						// need to find the actual import declaration, so we can provide
+						// a useful error message. Bit hoop-jumpy but what can you do
+						var name = Object.keys( module.imports )
+							.find( function (name) {
+								var declaration = module.imports[ name ];
+								return declaration.source === source;
+							});
+
+						var declaration = module.imports[ name ].specifier.parent;
+
+						module.error({
+							code: 'CANNOT_IMPORT_SELF',
+							message: "A module cannot import itself"
+						}, declaration.start );
+					}
+
+					module.resolvedIds[ source ] = resolvedId;
+					return this$1.fetchModule( resolvedId, module.id );
+				}
+			});
+	});
+};
+
+Bundle$$1.prototype.getPathRelativeToEntryDirname = function getPathRelativeToEntryDirname ( resolvedId ) {
+	if ( isRelative( resolvedId ) || isAbsolute( resolvedId ) ) {
+		var entryDirname = dirname( this.entryId );
+		var relativeToEntry = normalize( relative( entryDirname, resolvedId ) );
+
+		return isRelative( relativeToEntry ) ? relativeToEntry : ("./" + relativeToEntry);
+	}
+
+	return resolvedId;
+};
+
+Bundle$$1.prototype.render = function render ( options ) {
+		var this$1 = this;
+		if ( options === void 0 ) options = {};
+
+	if ( options.format === 'es6' ) {
+		this.warn({
+			code: 'DEPRECATED_ES6',
+			message: 'The es6 format is deprecated – use `es` instead'
+		});
+
+		options.format = 'es';
+	}
+
+	// Determine export mode - 'default', 'named', 'none'
+	var exportMode = getExportMode( this, options );
+
+	var magicString = new Bundle$2({ separator: '\n\n' });
+	var usedModules = [];
+
+	timeStart( 'render modules' );
+
+	this.orderedModules.forEach( function (module) {
+		var source = module.render( options.format === 'es', this$1.legacy );
+
+		if ( source.toString().length ) {
+			magicString.addSource( source );
+			usedModules.push( module );
+		}
+	});
+
+	if ( !magicString.toString().trim() && this.entryModule.getExports().length === 0 ) {
+		this.warn({
+			code: 'EMPTY_BUNDLE',
+			message: 'Generated an empty bundle'
+		});
+	}
+
+	timeEnd( 'render modules' );
+
+	var intro = [ options.intro ]
+		.concat(
+			this.plugins.map( function (plugin) { return plugin.intro && plugin.intro(); } )
+		)
+		.filter( Boolean )
+		.join( '\n\n' );
+
+	if ( intro ) intro += '\n\n';
+
+	var outro = [ options.outro ]
+		.concat(
+			this.plugins.map( function (plugin) { return plugin.outro && plugin.outro(); } )
+		)
+		.filter( Boolean )
+		.join( '\n\n' );
+
+	if ( outro ) outro = "\n\n" + outro;
+
+	var indentString = getIndentString( magicString, options );
+
+		var finalise = finalisers[ options.format ];
+	if ( !finalise ) {
+			error({
+				code: 'INVALID_OPTION',
+			message: ("You must specify an output type - valid options are " + (keys( finalisers ).join( ', ' )))
+		});
+	}
+
+	timeStart( 'render format' );
+
+	magicString = finalise( this, magicString.trim(), { exportMode: exportMode, indentString: indentString, intro: intro, outro: outro }, options );
+
+	timeEnd( 'render format' );
+
+	var banner = [ options.banner ]
+		.concat( this.plugins.map( function (plugin) { return plugin.banner; } ) )
+		.map( callIfFunction )
+		.filter( Boolean )
+		.join( '\n' );
+
+	var footer = [ options.footer ]
+		.concat( this.plugins.map( function (plugin) { return plugin.footer; } ) )
+		.map( callIfFunction )
+		.filter( Boolean )
+		.join( '\n' );
+
+	if ( banner ) magicString.prepend( banner + '\n' );
+	if ( footer ) magicString.append( '\n' + footer );
+
+	var code = magicString.toString();
+	var map = null;
+	var bundleSourcemapChain = [];
+
+	code = transformBundle( code, this.plugins, bundleSourcemapChain, options );
+
+	if ( options.sourceMap ) {
+		timeStart( 'sourceMap' );
+
+		var file = options.sourceMapFile || options.dest;
+		if ( file ) file = resolve( typeof process !== 'undefined' ? process.cwd() : '', file );
+
+		if ( this.hasLoaders || find( this.plugins, function (plugin) { return plugin.transform || plugin.transformBundle; } ) ) {
+			map = magicString.generateMap({});
+			if ( typeof map.mappings === 'string' ) {
+				map.mappings = decode( map.mappings );
+			}
+			map = collapseSourcemaps( this, file, map, usedModules, bundleSourcemapChain );
+		} else {
+			map = magicString.generateMap({ file: file, includeContent: true });
+		}
+
+		map.sources = map.sources.map( normalize );
+
+		timeEnd( 'sourceMap' );
+	}
+
+	if ( code[ code.length - 1 ] !== '\n' ) code += '\n';
+	return { code: code, map: map };
+};
+
+Bundle$$1.prototype.sort = function sort () {
+		var this$1 = this;
+
+	var hasCycles;
+	var seen = {};
+	var ordered = [];
+
+	var stronglyDependsOn = blank();
+	var dependsOn = blank();
+
+	this.modules.forEach( function (module) {
+		stronglyDependsOn[ module.id ] = blank();
+		dependsOn[ module.id ] = blank();
+	});
+
+	this.modules.forEach( function (module) {
+		function processStrongDependency ( dependency ) {
+			if ( dependency === module || stronglyDependsOn[ module.id ][ dependency.id ] ) return;
+
+			stronglyDependsOn[ module.id ][ dependency.id ] = true;
+			dependency.strongDependencies.forEach( processStrongDependency );
+		}
+
+		function processDependency ( dependency ) {
+			if ( dependency === module || dependsOn[ module.id ][ dependency.id ] ) return;
+
+			dependsOn[ module.id ][ dependency.id ] = true;
+			dependency.dependencies.forEach( processDependency );
+		}
+
+		module.strongDependencies.forEach( processStrongDependency );
+		module.dependencies.forEach( processDependency );
+	});
+
+	var visit = function (module) {
+		if ( seen[ module.id ] ) {
+			hasCycles = true;
+			return;
+		}
+
+		seen[ module.id ] = true;
+
+		module.dependencies.forEach( visit );
+		ordered.push( module );
+	};
+
+	visit( this.entryModule );
+
+	if ( hasCycles ) {
+		ordered.forEach( function ( a, i ) {
+			var loop = function (  ) {
+				var b = ordered[i];
+
+				// TODO reinstate this! it no longer works
+				if ( stronglyDependsOn[ a.id ][ b.id ] ) {
+					// somewhere, there is a module that imports b before a. Because
+					// b imports a, a is placed before b. We need to find the module
+					// in question, so we can provide a useful error message
+					var parent = '[[unknown]]';
+					var visited = {};
+
+					var findParent = function (module) {
+						if ( dependsOn[ module.id ][ a.id ] && dependsOn[ module.id ][ b.id ] ) {
+							parent = module.id;
+							return true;
+						}
+						visited[ module.id ] = true;
+						for ( var i = 0; i < module.dependencies.length; i += 1 ) {
+							var dependency = module.dependencies[i];
+							if ( !visited[ dependency.id ] && findParent( dependency ) ) return true;
+						}
+					};
+
+					findParent( this$1.entryModule );
+
+					this$1.onwarn(
+						("Module " + (a.id) + " may be unable to evaluate without " + (b.id) + ", but is included first due to a cyclical dependency. Consider swapping the import statements in " + parent + " to ensure correct ordering")
+					);
+				}
+			};
+
+				for ( i += 1; i < ordered.length; i += 1 ) loop(  );
+		});
+	}
+
+	return ordered;
+};
+
+Bundle$$1.prototype.warn = function warn ( warning ) {
+	warning.toString = function () {
+		var str = '';
+
+		if ( warning.plugin ) str += "(" + (warning.plugin) + " plugin) ";
+		if ( warning.loc ) str += (relativeId( warning.loc.file )) + " (" + (warning.loc.line) + ":" + (warning.loc.column) + ") ";
+		str += warning.message;
+
+		return str;
+	};
+
+	this.onwarn( warning );
+};
+
+var VERSION = '0.41.0';
+
+var ALLOWED_KEYS = [
+	'acorn',
+	'banner',
+	'cache',
+	'context',
+	'dest',
+	'entry',
+	'exports',
+	'external',
+	'footer',
+	'format',
+	'globals',
+	'indent',
+	'interop',
+	'intro',
+	'legacy',
+	'moduleContext',
+	'moduleId',
+	'moduleName',
+	'noConflict',
+	'onwarn',
+	'outro',
+	'paths',
+	'plugins',
+	'preferConst',
+	'sourceMap',
+	'sourceMapFile',
+	'targets',
+	'treeshake',
+	'useStrict'
+];
+
+function checkOptions ( options ) {
+	if ( !options || !options.entry ) {
+		return new Error( 'You must supply options.entry to rollup' );
+	}
+
+	if ( options.transform || options.load || options.resolveId || options.resolveExternal ) {
+		return new Error( 'The `transform`, `load`, `resolveId` and `resolveExternal` options are deprecated in favour of a unified plugin API. See https://github.com/rollup/rollup/wiki/Plugins for details' );
+	}
+
+	var err = validateKeys( keys(options), ALLOWED_KEYS );
+	if ( err ) return err;
+
+	return null;
+}
+
+function rollup ( options ) {
+	var err = checkOptions ( options );
+	if ( err ) return Promise.reject( err );
+
+	var bundle = new Bundle$$1( options );
+
+	timeStart( '--BUILD--' );
+
+	return bundle.build().then( function () {
+		timeEnd( '--BUILD--' );
+
+		function generate ( options ) {
+			if ( options === void 0 ) options = {};
+
+			if ( !options.format ) {
+				bundle.warn({
+					code: 'MISSING_FORMAT',
+					message: "No format option was supplied – defaulting to 'es'",
+					url: "https://github.com/rollup/rollup/wiki/JavaScript-API#format"
+				});
+
+				options.format = 'es';
+			}
+
+			timeStart( '--GENERATE--' );
+
+			var rendered = bundle.render( options );
+
+			timeEnd( '--GENERATE--' );
+
+			bundle.plugins.forEach( function (plugin) {
+				if ( plugin.ongenerate ) {
+					plugin.ongenerate( assign({
+						bundle: result
+					}, options ), rendered);
+				}
+			});
+
+			flushTime();
+
+			return rendered;
+		}
+
+		var result = {
+			imports: bundle.externalModules.map( function (module) { return module.id; } ),
+			exports: keys( bundle.entryModule.exports ),
+			modules: bundle.orderedModules.map( function (module) { return module.toJSON(); } ),
+
+			generate: generate,
+			write: function (options) {
+				if ( !options || !options.dest ) {
+					error({
+						code: 'MISSING_OPTION',
+						message: 'You must supply options.dest to bundle.write'
+					});
+				}
+
+				var dest = options.dest;
+				var output = generate( options );
+				var code = output.code;
+				var map = output.map;
+
+				var promises = [];
+
+				if ( options.sourceMap ) {
+					var url;
+
+					if ( options.sourceMap === 'inline' ) {
+						url = map.toUrl();
+					} else {
+						url = (basename( dest )) + ".map";
+						promises.push( writeFile( dest + '.map', map.toString() ) );
+					}
+
+					code += "//# " + SOURCEMAPPING_URL + "=" + url + "\n";
+				}
+
+				promises.push( writeFile( dest, code ) );
+				return Promise.all( promises ).then( function () {
+					return mapSequence( bundle.plugins.filter( function (plugin) { return plugin.onwrite; } ), function (plugin) {
+						return Promise.resolve( plugin.onwrite( assign({
+							bundle: result
+						}, options ), output));
+					});
+				});
+			}
+		};
+
+		return result;
+	});
+}
+
+exports.VERSION = VERSION;
+exports.rollup = rollup;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+//# sourceMappingURL=rollup.browser.js.map
diff --git a/jooby-assets-rollup/src/main/resources/rollup.js b/jooby-assets-rollup/src/main/resources/rollup.js
index 473fdb2311..1f4078378a 100644
--- a/jooby-assets-rollup/src/main/resources/rollup.js
+++ b/jooby-assets-rollup/src/main/resources/rollup.js
@@ -8,13 +8,24 @@
 
   // remove output/gen options from root options
   var genopts;
-  if (options.output) {
-    genopts = options.output;
-    delete options.output;
+  if (options.generate) {
+    genopts = options.generate;
+    delete options.generate;
   } else {
     genopts = {};
   }
 
+  if (!genopts.format) {
+    genopts.format = 'es';
+  }
+
+  var plugins = options.plugins || {};
+  delete options.plugins;
+
+  var aliasOptions = plugins.alias;
+  var babelOptions = plugins.babel;
+  var legacyOptions = plugins.legacy;
+
   /**
    * Normalize path by removing double slash (//), replace ./ with / and append .js extension
    * if missing.
@@ -42,19 +53,38 @@
     }
     return null;
   };
+  /** Required by rollup */
+  window.performance = {now: function () {return Date.now;}};
 
-  /** Source: https://github.com/requirejs/prim/blob/master/prim.js */
+  /**
+   * Source: https://github.com/requirejs/prim/blob/master/prim.js
+   * Required by rollup.
+   */
   assets.load('lib/prim.js');
   window.Promise = prim;
 
   /** Source: npm install rollup; npm_modules/rollup/rollup.browser.js */
-  assets.load('lib/rollup-0.19.1.js');
+  assets.load('lib/rollup-0.41.6.js');
 
-  var output,
-    errors = [];
+  var plugins = [];
 
-  rollup.rollup({
-    entry: filename,
+  if (aliasOptions) {
+    var aliasPlugin = {
+      name: 'alias',
+
+      resolveId: function (importee, importer) {
+        var alias = aliasOptions[importee];
+        if (alias) {
+          console.debug('alias ', alias, ':', importee, ' from', importer);
+          return alias;
+        }
+      }
+    };
+    plugins.push(aliasPlugin);
+  }
+
+  var loaderPlugin = {
+    name: 'classpath-loader',
 
     /**
      * relative modules have precedence over absolute modules.
@@ -68,14 +98,15 @@
       if (segments.length > 2) {
         basedir = segments.slice(0, -1).join('/');
       }
-      return resolveFirst(basedir + '/' + importee, importee) || importee;
+      var relative = basedir + '/' + importee;
+      return resolveFirst(relative, relative + '.js', importee, importee + '.js') || importee;
     },
 
     /**
      * load a module by id (a.k.a path). 
      */
     load: function (id) {
-      console.debug('loading: ' + id);
+      console.debug('loading: ', id);
       if (id === filename) {
         return source;
       }
@@ -86,6 +117,55 @@
         throw 'File not found: ' + id;
       }
     }
+  };
+
+  plugins.push(loaderPlugin);
+
+  if (legacyOptions) {
+    var legacyPlugin = {
+      name: 'legacy',
+
+      transform: function (code, id) {
+        var name = legacyOptions[id];
+        if (name) {
+          console.debug('legacy: ', id, ' -> ', name);
+          return code + '\nexport default ' + name + ';';
+        }
+      }
+    };
+    plugins.push(legacyPlugin);
+  }
+
+  if (babelOptions) {
+    // Babel: https://github.com/babel/babel-standalone
+    assets.load('lib/babel-6.24.0.min.js');
+    var filter = j2v8.createFilter(babelOptions.includes, babelOptions.excludes);
+    delete babelOptions.includes;
+    delete babelOptions.excludes;
+    var babelPlugin = {
+      name: 'babel',
+
+      transform: function (code, id) {
+        if (!filter(id)) {
+          console.debug('babel ignoring ', id)
+          return null;
+        }
+        var transformed = Babel.transform(code, babelOptions);
+        return {
+          code: transformed.code,
+          map: transformed.map
+        };
+      }
+    };
+    plugins.push(babelPlugin);
+  }
+
+  var output,
+    errors = [];
+
+  rollup.rollup({
+    entry: filename,
+    plugins: plugins,
   }).catch(function (ex) {
     errors.push({
       message: ex.toString()
diff --git a/jooby-assets-rollup/src/test/java/org/jooby/assets/RollupTest.java b/jooby-assets-rollup/src/test/java/org/jooby/assets/RollupTest.java
index 6ec9b56045..15d4ce3791 100644
--- a/jooby-assets-rollup/src/test/java/org/jooby/assets/RollupTest.java
+++ b/jooby-assets-rollup/src/test/java/org/jooby/assets/RollupTest.java
@@ -2,8 +2,11 @@
 
 import static org.junit.Assert.assertEquals;
 
+import java.util.Arrays;
+
 import org.junit.Test;
 
+import com.google.common.collect.ImmutableMap;
 import com.typesafe.config.ConfigFactory;
 
 public class RollupTest {
@@ -15,16 +18,66 @@ public void name() throws Exception {
 
   @Test
   public void defaults() throws Exception {
-    assertEquals("console.log( cube( 5 ) ); // 125",
+    assertEquals("console.log( cube( 5 ) ); // 125\n",
         new Rollup()
             .process("/main.js",
                 "console.log( cube( 5 ) ); // 125",
                 ConfigFactory.empty()));
   }
 
+  @Test
+  public void babel() throws Exception {
+    assertEquals("var name = \"Babel\";\n" +
+        "console.log(\"Hello \" + name);\n",
+        new Rollup()
+            .set("plugins",
+                ImmutableMap.of("babel", ImmutableMap.of("presets", Arrays.asList("es2015"))))
+            .process("/babel.js", "var name = \"Babel\";\n"
+                + "console.log( `Hello ${name}` );",
+                ConfigFactory.empty()));
+  }
+
+  @Test
+  public void babelImport() throws Exception {
+    assertEquals("var hi = (function (message) {\n" +
+        "  console.log(\"Hello \" + message);\n" +
+        "});\n" +
+        "\n" +
+        "hi(\"babel\");\n" +
+        "",
+        new Rollup()
+            .set("plugins", ImmutableMap.of("babel",
+                ImmutableMap.of("presets",
+                    Arrays.asList(Arrays.asList("es2015", ImmutableMap.of("modules", false))))))
+            .process("/app.js", "import hi from './lib/lib.js';\n"
+                + "hi(\"babel\");",
+                ConfigFactory.empty()));
+  }
+
+  @Test
+  public void babelExcludes() throws Exception {
+    assertEquals("var hi = (message) => {\n" +
+        "  console.log(`Hello ${message}`);\n" +
+        "};\n" +
+        "\n" +
+        "hi(\"babel\");\n" +
+        "",
+        new Rollup()
+            .set("babel", ImmutableMap.of("presets",
+                Arrays.asList(Arrays.asList("es2015", ImmutableMap.of("modules", false))),
+                "excludes", "/lib/*.js"))
+            .process("/app.js", "import hi from './lib/lib.js';\n"
+                + "hi(\"babel\");",
+                ConfigFactory.empty()));
+  }
+
   @Test
   public void inlineSourceMap() throws Exception {
-    assertEquals("// This function gets included\n" +
+    assertEquals("// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
+        "\n" +
+        "// This function gets included\n" +
         "function cube ( x ) {\n" +
         "  // rewrite this as `square( x ) * x`\n" +
         "  // and see what happens!\n" +
@@ -32,25 +85,66 @@ public void inlineSourceMap() throws Exception {
         "}\n" +
         "\n" +
         "console.log( cube( 5 ) ); // 125\n" +
-        "//#sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjpudWxsLCJzb3VyY2VzIjpbIi9tYXRocy5qcyIsIi9tYWluLmpzIl0sInNvdXJjZXNDb250ZW50IjpbIi8vIFRoaXMgZnVuY3Rpb24gaXNuJ3QgdXNlZCBhbnl3aGVyZSwgc29cbi8vIFJvbGx1cCBleGNsdWRlcyBpdCBmcm9tIHRoZSBidW5kbGUuLi5cbmV4cG9ydCBmdW5jdGlvbiBzcXVhcmUgKCB4ICkge1xuICByZXR1cm4geCAqIHg7XG59XG5cbi8vIFRoaXMgZnVuY3Rpb24gZ2V0cyBpbmNsdWRlZFxuZXhwb3J0IGZ1bmN0aW9uIGN1YmUgKCB4ICkge1xuICAvLyByZXdyaXRlIHRoaXMgYXMgYHNxdWFyZSggeCApICogeGBcbiAgLy8gYW5kIHNlZSB3aGF0IGhhcHBlbnMhXG4gIHJldHVybiB4ICogeCAqIHg7XG59IiwiaW1wb3J0IHsgY3ViZSB9IGZyb20gJy4vbWF0aHMuanMnO1xuY29uc29sZS5sb2coIGN1YmUoIDUgKSApOyAvLyAxMjUiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IjtBQU9PLFNBQVMsSUFBSSxHQUFHLENBQUMsR0FBRzs7O0VBR3pCLE9BQU8sQ0FBQyxHQUFHLENBQUMsR0FBRyxDQUFDOzs7QUNUbEIsT0FBTyxDQUFDLEdBQUcsRUFBRSxJQUFJLEVBQUUsQ0FBQyxFQUFFLEVBQUUsQ0FBQyJ9",
+        "\n" +
+        "//#sourceMappingURL=data:application/json;charset=utf-8;base64,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",
         new Rollup()
-            .set("output.sourceMap", "inline")
+            .set("generate.sourceMap", "inline")
             .process("/main.js",
                 "import { cube } from './maths.js';\n" +
                     "console.log( cube( 5 ) ); // 125",
                 ConfigFactory.empty()));
   }
 
+  @Test
+  public void legacy() throws Exception {
+    assertEquals("(function() {\n" +
+        "  var exports = window || global || this;\n" +
+        "  exports.print = function (message) {\n" +
+        "    console.log(message);\n" +
+        "  };\n" +
+        "})();\n" +
+        "\n" +
+        "fn('foo');\n" +
+        "",
+        new Rollup()
+            .set("plugins", ImmutableMap.of("legacy", ImmutableMap.of("/lib/legacy.js", "fn")))
+            .process("/main.js",
+                "import fn from 'lib/legacy';\n" +
+                    "fn('foo');",
+                ConfigFactory.empty()));
+  }
+
+  @Test
+  public void alias() throws Exception {
+    assertEquals("var message = (message) => {\n" +
+        "  console.log(`Hello ${message}`);\n" +
+        "};\n" +
+        "\n" +
+        "message('foo');\n" +
+        "",
+        new Rollup()
+            .set("plugins", ImmutableMap.of("alias", ImmutableMap.of("mylib", "lib/lib.js")))
+            .process("/alias.js",
+                "import message from 'mylib';\n" +
+                    "message('foo');",
+                ConfigFactory.empty()));
+  }
+
   @Test
   public void imports() throws Exception {
-    assertEquals("// This function gets included\n" +
+    assertEquals("// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
+        "\n" +
+        "// This function gets included\n" +
         "function cube ( x ) {\n" +
         "  // rewrite this as `square( x ) * x`\n" +
         "  // and see what happens!\n" +
         "  return x * x * x;\n" +
         "}\n" +
         "\n" +
-        "console.log( cube( 5 ) ); // 125",
+        "console.log( cube( 5 ) ); // 125\n" +
+        "",
         new Rollup()
             .process("/main.js",
                 "import { cube } from './maths.js';\n" +
@@ -60,14 +154,19 @@ public void imports() throws Exception {
 
   @Test
   public void importRelative() throws Exception {
-    assertEquals("// This function gets included\n" +
+    assertEquals("// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
+        "\n" +
+        "// This function gets included\n" +
         "function cube ( x ) {\n" +
         "  // rewrite this as `square( x ) * x`\n" +
         "  // and see what happens!\n" +
         "  return x * 3;\n" +
         "}\n" +
         "\n" +
-        "console.log( cube( 5 ) ); // 125",
+        "console.log( cube( 5 ) ); // 125\n" +
+        "",
         new Rollup()
             .process("/relative/main.js",
                 "import { cube } from './maths.js';\n" +
@@ -75,22 +174,50 @@ public void importRelative() throws Exception {
                 ConfigFactory.empty()));
   }
 
+  @Test
+  public void importNoExt() throws Exception {
+    assertEquals("// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
+        "\n" +
+        "// This function gets included\n" +
+        "function cube ( x ) {\n" +
+        "  // rewrite this as `square( x ) * x`\n" +
+        "  // and see what happens!\n" +
+        "  return x * 3;\n" +
+        "}\n" +
+        "\n" +
+        "console.log( cube( 5 ) ); // 125\n" +
+        "",
+        new Rollup()
+            .process("/relative/main.js",
+                "import { cube } from 'maths';\n" +
+                    "console.log( cube( 5 ) ); // 125",
+                ConfigFactory.empty()));
+  }
+
   @Test
   public void iife() throws Exception {
-    assertEquals("(function () { 'use strict';\n" +
+    assertEquals("(function () {\n" +
+        "'use strict';\n" +
+        "\n" +
+        "// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
         "\n" +
-        "  // This function gets included\n" +
-        "  function cube ( x ) {\n" +
-        "    // rewrite this as `square( x ) * x`\n" +
-        "    // and see what happens!\n" +
-        "    return x * x * x;\n" +
-        "  }\n" +
+        "// This function gets included\n" +
+        "function cube ( x ) {\n" +
+        "  // rewrite this as `square( x ) * x`\n" +
+        "  // and see what happens!\n" +
+        "  return x * x * x;\n" +
+        "}\n" +
         "\n" +
-        "  console.log( cube( 5 ) ); // 125\n" +
+        "console.log( cube( 5 ) ); // 125\n" +
         "\n" +
-        "})();",
+        "}());\n" +
+        "",
         new Rollup()
-            .set("output.format", "iife")
+            .set("generate.format", "iife")
             .process("/main.js",
                 "import { cube } from './maths.js';\n" +
                     "console.log( cube( 5 ) ); // 125",
@@ -101,18 +228,23 @@ public void iife() throws Exception {
   public void amd() throws Exception {
     assertEquals("define(function () { 'use strict';\n" +
         "\n" +
-        "  // This function gets included\n" +
-        "  function cube ( x ) {\n" +
-        "    // rewrite this as `square( x ) * x`\n" +
-        "    // and see what happens!\n" +
-        "    return x * x * x;\n" +
-        "  }\n" +
+        "// This function isn't used anywhere, so\n" +
+        "// Rollup excludes it from the bundle...\n" +
+        "\n" +
+        "\n" +
+        "// This function gets included\n" +
+        "function cube ( x ) {\n" +
+        "  // rewrite this as `square( x ) * x`\n" +
+        "  // and see what happens!\n" +
+        "  return x * x * x;\n" +
+        "}\n" +
         "\n" +
-        "  console.log( cube( 5 ) ); // 125\n" +
+        "console.log( cube( 5 ) ); // 125\n" +
         "\n" +
-        "});",
+        "});\n" +
+        "",
         new Rollup()
-            .set("output.format", "amd")
+            .set("generate.format", "amd")
             .process("/main.js",
                 "import { cube } from './maths.js';\n" +
                     "console.log( cube( 5 ) ); // 125",
@@ -126,12 +258,12 @@ public void dynamicNamespace() throws Exception {
         "const φ = 1.61803;\n" +
         "const λ = 1.30357;\n" +
         "\n" +
-        "var constants = {\n" +
+        "var constants = Object.freeze({\n" +
         "  π: π,\n" +
         "  e: e,\n" +
         "  φ: φ,\n" +
         "  λ: λ\n" +
-        "};\n" +
+        "});\n" +
         "\n" +
         "// In some cases, you don't know which exports will\n" +
         "// be accessed until you actually run the code. In\n" +
@@ -139,7 +271,8 @@ public void dynamicNamespace() throws Exception {
         "// for dynamic lookup\n" +
         "Object.keys( constants ).forEach( key => {\n" +
         "  console.log( `The value of ${key} is ${constants[key]}` );\n" +
-        "});",
+        "});\n" +
+        "",
         new Rollup()
             .process("/main.js",
                 "import * as constants from './constants';\n" +
diff --git a/jooby-assets-rollup/src/test/resources/lib/legacy.js b/jooby-assets-rollup/src/test/resources/lib/legacy.js
new file mode 100644
index 0000000000..14901038b5
--- /dev/null
+++ b/jooby-assets-rollup/src/test/resources/lib/legacy.js
@@ -0,0 +1,6 @@
+(function() {
+  var exports = window || global || this;
+  exports.print = function (message) {
+    console.log(message);
+  };
+})();
diff --git a/jooby-assets-rollup/src/test/resources/lib/lib.js b/jooby-assets-rollup/src/test/resources/lib/lib.js
new file mode 100644
index 0000000000..c1b3aa8df7
--- /dev/null
+++ b/jooby-assets-rollup/src/test/resources/lib/lib.js
@@ -0,0 +1,3 @@
+export default (message) => {
+  console.log(`Hello ${message}`);
+};
diff --git a/jooby-assets/src/main/java/org/jooby/assets/AssetCompiler.java b/jooby-assets/src/main/java/org/jooby/assets/AssetCompiler.java
index 583ad6cca2..945a1192b6 100644
--- a/jooby-assets/src/main/java/org/jooby/assets/AssetCompiler.java
+++ b/jooby-assets/src/main/java/org/jooby/assets/AssetCompiler.java
@@ -49,7 +49,6 @@
 
 import org.jooby.Asset;
 import org.jooby.MediaType;
-import org.jooby.internal.RoutePattern;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -410,7 +409,7 @@ private String compile(final List<AssetProcessor> pipeline, final String filenam
     String contents = input;
     while (it.hasNext()) {
       AssetProcessor processor = it.next();
-      if (processor.matches(type) && !excludes(processor, filename)) {
+      if (processor.matches(type) && !processor.excludes(filename)) {
         String pname = processor.name();
         long start = System.currentTimeMillis();
         try {
@@ -434,26 +433,6 @@ private String sha1(final String source) {
         .substring(0, 8).toLowerCase();
   }
 
-  @SuppressWarnings("unchecked")
-  private boolean excludes(final AssetProcessor processor, final String path) {
-    Object value = processor.get("excludes");
-    if (value == null) {
-      return false;
-    }
-    List<String> excludes;
-    if (value instanceof List) {
-      excludes = (List<String>) value;
-    } else {
-      excludes = ImmutableList.of(value.toString());
-    }
-    String spath = spath(path);
-    return excludes.stream()
-        .map(it -> new RoutePattern("GET", it))
-        .filter(pattern -> pattern.matcher("GET" + spath).matches())
-        .findFirst()
-        .isPresent();
-  }
-
   private static String readFile(final ClassLoader loader, final String path, final Charset charset)
       throws IOException {
     String spath = path.startsWith("/") ? path.substring(1) : path;
diff --git a/jooby-assets/src/main/java/org/jooby/assets/AssetOptions.java b/jooby-assets/src/main/java/org/jooby/assets/AssetOptions.java
index 7d8d4bb664..d13b66b35b 100644
--- a/jooby-assets/src/main/java/org/jooby/assets/AssetOptions.java
+++ b/jooby-assets/src/main/java/org/jooby/assets/AssetOptions.java
@@ -20,8 +20,13 @@
 
 import static java.util.Objects.requireNonNull;
 
+import java.util.List;
 import java.util.Map;
 
+import org.jooby.Route;
+import org.jooby.internal.RoutePattern;
+
+import com.google.common.collect.ImmutableList;
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigFactory;
 import com.typesafe.config.ConfigValueFactory;
@@ -51,6 +56,26 @@ public Map<String, Object> options() {
     return options.withoutPath("excludes").root().unwrapped();
   }
 
+  @SuppressWarnings("unchecked")
+  public boolean excludes(final String path) {
+    Object value = get("excludes");
+    if (value == null) {
+      return false;
+    }
+    List<String> excludes;
+    if (value instanceof List) {
+      excludes = (List<String>) value;
+    } else {
+      excludes = ImmutableList.of(value.toString());
+    }
+    String spath = Route.normalize(path);
+    return excludes.stream()
+        .map(it -> new RoutePattern("GET", it))
+        .filter(pattern -> pattern.matcher("GET" + spath).matches())
+        .findFirst()
+        .isPresent();
+  }
+
   @SuppressWarnings("unchecked")
   public <T> T get(final String name) {
     requireNonNull(name, "Option's name is required.");
diff --git a/md/doc/assets-rollup/rollup.md b/md/doc/assets-rollup/rollup.md
index 3f120d4b6c..c74d6b3fcd 100644
--- a/md/doc/assets-rollup/rollup.md
+++ b/md/doc/assets-rollup/rollup.md
@@ -19,36 +19,92 @@
 
 ```
 assets {
- fileset {
-   home: ...
- }
- pipeline {
-   ...
-   dist: [rollup]
- }
+  fileset {
+    home: ...
+  }
+
+  pipeline {
+    ...
+    dev: [rollup]
+    dist: [rollup]
+  }
+
 }
 ```
 
 ## options
 
+### generate
+
 ```
-assets {
- fileset {
-   home: ...
- }
- pipeline {
-   ...
-   dist: [rollmap]
- }
- rollup {
-   output {
-     format: amd
-   }
- }
-}
+rollup {
+    genereate {
+      format: es
+    }
+  }
+
+```
+
+See <a href="https://github.com/rollup/rollup/wiki/JavaScript-API#bundlegenerate-options-">generate options</a>.
+
+### plugins
+
+#### babel
+
+```
+rollup {
+    plugins {
+      babel {
+        presets: [[es2015, {modules: false}]]
+      }
+    }
+  }
+
 ```
 
-See: <a href="https://github.com/rollup/rollup/wiki/JavaScript-API">rollup.js options.</a>
+See <a href="https://babeljs.io/">https://babeljs.io</a> for more options.
+
+#### legacy
+
+Add a ```export default``` line to legacy modules:
+
+```
+rollup {
+    plugins {
+      legacy {
+        "/js/lib/react.js": React
+      }
+    }
+  }
+
+```
+
+#### alias
+
+Set an alias to a common (probably long) path.
+
+```
+rollup {
+    plugins {
+      alias {
+        "/js/lib/react.js": "react"
+      }
+    }
+  }
+
+```
+
+Instead of:
+
+```js
+import React from 'js/lib/react.js';
+```
+
+Now, you can import a module like:
+
+```js
+import React from 'react';
+```
 
 # see also