diff --git a/lib/ometajs/compiler/ir.js b/lib/ometajs/compiler/ir.js
index a86a8989..1b1b375b 100644
--- a/lib/ometajs/compiler/ir.js
+++ b/lib/ometajs/compiler/ir.js
@@ -307,7 +307,12 @@ IR.prototype.render = function render(options) {
         break;
       case 'seq':
       case 're':
-        buf.push('this._seq(', ast[1], ')');
+        if (/^\/\^/.test(ast[1])) {
+          buf.push('this._seq(', ast[1], ')');
+        } else {
+          var re = ast[1].replace(/^\/(.*)\/(\w*)$/, '/^($1)/$2');
+          buf.push('this._seq(', re, ')');
+        }
         break;
       case 'optional':
         buf.push('this._', ast[0], '(function() {return ');
diff --git a/lib/ometajs/grammars/bsjs.js b/lib/ometajs/grammars/bsjs.js
index 763f12a0..a5cc7557 100644
--- a/lib/ometajs/grammars/bsjs.js
+++ b/lib/ometajs/grammars/bsjs.js
@@ -29,15 +29,15 @@ BSJSParser.prototype["space"] = function $space() {
 };
 
 BSJSParser.prototype["nameFirst"] = function $nameFirst() {
-    return this._seq(/^[a-z$_]/i);
+    return this._seq(/^([a-z$_])/i);
 };
 
 BSJSParser.prototype["nameLast"] = function $nameLast() {
-    return this._seq(/^[a-z0-9$_]/i);
+    return this._seq(/^([a-z0-9$_])/i);
 };
 
 BSJSParser.prototype["iName"] = function $iName() {
-    return this._seq(/^[a-z$_][a-z0-9$_]*/i);
+    return this._seq(/^([a-z$_][a-z0-9$_]*)/i);
 };
 
 BSJSParser.prototype["isKeyword"] = function $isKeyword() {
@@ -74,10 +74,10 @@ BSJSParser.prototype["hexLit"] = function $hexLit() {
 BSJSParser.prototype["number"] = function $number() {
     return this._atomic(function() {
         var n;
-        return this._seq(/^0x[0-9a-f]+/) && (n = this._getIntermediate(), true) && this._exec([ "number", parseInt(n) ]);
+        return this._seq(/^(0x[0-9a-f]+)/) && (n = this._getIntermediate(), true) && this._exec([ "number", parseInt(n) ]);
     }) || this._atomic(function() {
         var f;
-        return this._seq(/^\d+((\.|[eE][\-+]?)\d+)?/) && (f = this._getIntermediate(), true) && this._exec([ "number", parseFloat(f) ]);
+        return this._seq(/^(\d+((\.|[eE][\-+]?)\d+)?)/) && (f = this._getIntermediate(), true) && this._exec([ "number", parseFloat(f) ]);
     });
 };
 
@@ -125,7 +125,7 @@ BSJSParser.prototype["escapeChar"] = function $escapeChar() {
 BSJSParser.prototype["str"] = function $str() {
     return this._atomic(function() {
         var s;
-        return this._seq(/^'([^'\\]|\\.)*'/) && (s = this._getIntermediate(), true) && this._exec(function() {
+        return this._seq(/^('([^'\\]|\\.)*')/) && (s = this._getIntermediate(), true) && this._exec(function() {
             function swap(quote) {
                 return quote === '"' ? "'" : '"';
             }
@@ -133,13 +133,13 @@ BSJSParser.prototype["str"] = function $str() {
         }.call(this));
     }) || this._atomic(function() {
         var s;
-        return this._seq(/^"([^"\\]|\\.)*"/) && (s = this._getIntermediate(), true) && this._exec([ "string", JSON.parse(preparseString(s)) ]);
+        return this._seq(/^("([^"\\]|\\.)*")/) && (s = this._getIntermediate(), true) && this._exec([ "string", JSON.parse(preparseString(s)) ]);
     });
 };
 
 BSJSParser.prototype["special"] = function $special() {
     var s;
-    return this._seq(/^(>>>|<<<|!==|===|&&=|\|\|=|!=|==|>=|<=|\+\+|\+=|--|-=|\*=|\/=|%=|&&|\|\||>>|&=|\|=|\^=|[\(\){}\[\],;?:><=\+\-\*\/%&|\^~\.!])/) && (s = this._getIntermediate(), true) && this._exec([ s, s ]);
+    return this._seq(/^((>>>|<<<|!==|===|&&=|\|\|=|!=|==|>=|<=|\+\+|\+=|--|-=|\*=|\/=|%=|&&|\|\||>>|&=|\|=|\^=|[\(\){}\[\],;?:><=\+\-\*\/%&|\^~\.!]))/) && (s = this._getIntermediate(), true) && this._exec([ s, s ]);
 };
 
 BSJSParser.prototype["token"] = function $token() {
diff --git a/lib/ometajs/grammars/bsjs.ometajs b/lib/ometajs/grammars/bsjs.ometajs
index dc24487f..ecb65642 100644
--- a/lib/ometajs/grammars/bsjs.ometajs
+++ b/lib/ometajs/grammars/bsjs.ometajs
@@ -1,16 +1,16 @@
 ometa BSJSParser {
   space        = ^@space | /^\/\/[^\n]*/ | /^\/\*(.|[\r\n])*?\*\//,
-  nameFirst    = /^[a-z$_]/i,
-  nameLast     = /^[a-z0-9$_]/i,
-  iName        = /^[a-z$_][a-z0-9$_]*/i,
+  nameFirst    = /[a-z$_]/i,
+  nameLast     = /[a-z0-9$_]/i,
+  iName        = /[a-z$_][a-z0-9$_]*/i,
   isKeyword :x = ?BSJSParser._isKeyword(x),
   name         = @iName:n ~isKeyword(n)                                               -> [#name, n],
   keyword      = @iName:k isKeyword(k)                                                -> [k, k],
   hexDigit     = @char:x {BSJSParser.hexDigits.indexOf(x.toLowerCase())}:v ?(v >= 0)  -> v,
   hexLit       = hexLit:n hexDigit:d                                                  -> (n * 16 + d)
                | hexDigit,
-  number       = /^0x[0-9a-f]+/:n                                                      -> [#number, parseInt(n)]
-               | /^\d+((\.|[eE][\-+]?)\d+)?/:f                                         -> [#number, parseFloat(f)],
+  number       = /0x[0-9a-f]+/:n                                                      -> [#number, parseInt(n)]
+               | /\d+((\.|[eE][\-+]?)\d+)?/:f                                         -> [#number, parseFloat(f)],
   escapeChar   = <'\\' char>:s -> {
                  switch (s) {
                    case '\\"': return '"';
@@ -28,7 +28,7 @@ ometa BSJSParser {
                       | 'x' hexDigit hexDigit)>:s -> {
                  JSON.parse('"' + s + '"')
                },
-  str          = /^'([^'\\]|\\.)*'/:s -> {
+  str          = /'([^'\\]|\\.)*'/:s -> {
                  function swap(quote) {
                    return quote === '"' ? '\'' : '"';
                  }
@@ -38,8 +38,8 @@ ometa BSJSParser {
                        .replace(/["']/g, swap)
                  ];
                }
-               | /^"([^"\\]|\\.)*"/:s -> [#string, JSON.parse(preparseString(s))],
-  special      = /^(>>>|<<<|!==|===|&&=|\|\|=|!=|==|>=|<=|\+\+|\+=|--|-=|\*=|\/=|%=|&&|\|\||>>|&=|\|=|\^=|[\(\){}\[\],;?:><=\+\-\*\/%&|\^~\.!])/:s -> [s, s],
+               | /"([^"\\]|\\.)*"/:s -> [#string, JSON.parse(preparseString(s))],
+  special      = /(>>>|<<<|!==|===|&&=|\|\|=|!=|==|>=|<=|\+\+|\+=|--|-=|\*=|\/=|%=|&&|\|\||>>|&=|\|=|\^=|[\(\){}\[\],;?:><=\+\-\*\/%&|\^~\.!])/:s -> [s, s],
   token        = @spaces (@name | @keyword | @number | @str | @special),
   toks         = @token*:ts @spaces end                                                -> ts,
   spacesNoNl   = (~'\n' space)*,