Merge pull request #805 from slang800/remove_AST_filters

removing ast filters closes #790

Readme.md

@@ -65,7 +65,6 @@
   - transparent iteration over objects, arrays, and even non-enumerables via `each`
   - block comments
   - no tag prefix
-  - AST filters
   - filters
     - :stylus must have [stylus](http://github.com/LearnBoost/stylus) installed
     - :less must have [less.js](http://github.com/cloudhead/less.js) installed

lib/compiler.js

@@ -409,22 +409,14 @@ Compiler.prototype = {
     var fn = filters[filter.name];
 
     // unknown filter
-    if (!fn) {
-      if (filter.isASTFilter) {
-        throw new Error('unknown ast filter "' + filter.name + ':"');
-      } else {
-        throw new Error('unknown filter ":' + filter.name + '"');
-      }
-    }
-
-    if (filter.isASTFilter) {
-      this.buf.push(fn(filter.block, this, filter.attrs));
-    } else {
-      var text = filter.block.nodes.map(function(node){ return node.val }).join('\n');
-      filter.attrs = filter.attrs || {};
-      filter.attrs.filename = this.options.filename;
-      this.buffer(utils.text(fn(text, filter.attrs)));
-    }
+    if (!fn) throw new Error('unknown filter ":' + filter.name + '"');
+
+    var text = filter.block.nodes.map(
+      function(node){ return node.val; }
+    ).join('\n');
+    filter.attrs = filter.attrs || {};
+    filter.attrs.filename = this.options.filename;
+    this.buffer(utils.text(fn(text, filter.attrs)));
   },
 
   /**

lib/nodes/filter.js

@@ -13,7 +13,7 @@ var Node = require('./node')
   , Block = require('./block');
 
 /**
- * Initialize a `Filter` node with the given 
+ * Initialize a `Filter` node with the given
  * filter `name` and `block`.
  *
  * @param {String} name
@@ -25,7 +25,6 @@ var Filter = module.exports = function Filter(name, block, attrs) {
   this.name = name;
   this.block = block;
   this.attrs = attrs;
-  this.isASTFilter = !block.nodes.every(function(node){ return node.isText });
 };
 
 /**

lib/parser.js

@@ -360,23 +360,6 @@ Parser.prototype = {
     return node;
   },
 
-  /**
-   * tag ':' attrs? block
-   */
-
-  parseASTFilter: function(){
-    var block
-      , tok = this.expect('tag')
-      , attrs = this.accept('attrs');
-
-    this.expect(':');
-    block = this.block();
-
-    var node = new nodes.Filter(tok.val, block, attrs && attrs.attrs);
-    node.line = this.line();
-    return node;
-  },
-
   /**
    * each block
    */
@@ -607,11 +590,6 @@ Parser.prototype = {
     // ast-filter look-ahead
     var i = 2;
     if ('attrs' == this.lookahead(i).type) ++i;
-    if (':' == this.lookahead(i).type) {
-      if ('indent' == this.lookahead(++i).type) {
-        return this.parseASTFilter();
-      }
-    }
 
     var tok = this.advance()
       , tag = new nodes.Tag(tok.val);