diff --git a/lib/compiler.js b/lib/compiler.js
index 06ae83b..6a14076 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -43,6 +43,20 @@ PEG.buildParser = function(grammar, startRule) {
 /* Array manipulation utility functions. */
 
 PEG.ArrayUtils = {
+  /* Like Python's |range|, but without |step|. */
+  range: function(start, stop) {
+    if (stop === undefined) {
+      stop = start;
+      start = 0;
+    }
+
+    var result = new Array(Math.max(0, stop - start));
+    for (var i = 0, j = start; j < stop; i++, j++) {
+      result[i] = j;
+    }
+    return result;
+  },
+
   /*
    * The code needs to be in sync with a code template in
    * PEG.Grammar.Action.prototype.compile.
@@ -194,6 +208,10 @@ PEG.Grammar.Any = function() {};
 
 PEG.Grammar.Sequence = function(elements) { this._elements = elements; };
 
+PEG.Grammar.Sequence.prototype = {
+  getElements: function() { return this._elements; }
+};
+
 PEG.Grammar.Choice = function(alternatives) {
   this._alternatives = alternatives;
 };
@@ -991,28 +1009,34 @@ PEG.Grammar.RuleRef.prototype.compile = function(resultVar) {
 };
 
 PEG.Grammar.Action.prototype.compile = function(resultVar) {
-  var expressionResultVar = PEG.Compiler.generateUniqueIdentifier("result");
-
-  var actionCode = this._action.replace(
-    /\$(\d+)/g,
-    function(match, digits) {
-      return PEG.Compiler.formatCode(
-        "(arguments[${index}])",
-        { index: parseInt(digits) - 1 }
-      );
-    }
-  )
-  var actionFunction = PEG.Compiler.formatCode(
-    "function() { ${actionCode} }",
-    { actionCode: actionCode }
-  );
-
   /*
    * In case of sequences, we splat their elements into function arguments one
    * by one. Example:
    *
-   *   start: "a" "b" "c" { alert(arguments.length) }     // => "3"
+   *   start: "a" "b" "c" { alert(arguments.length) }     // => 3
+   *
+   * This behavior is reflected in this function.
    */
+
+  var expressionResultVar = PEG.Compiler.generateUniqueIdentifier("result");
+
+  var paramCount =  this._expression instanceof PEG.Grammar.Sequence
+    ? this._expression.getElements().length
+    : 1;
+
+  var params = PEG.ArrayUtils.map(
+    PEG.ArrayUtils.range(1, paramCount + 1),
+    function(n) { return "$" + n; }
+  ).join(", ");
+
+  var actionFunction = PEG.Compiler.formatCode(
+    "function(${params}) { ${action} }",
+    {
+      params: params,
+      action: this._action
+    }
+  );
+
   var invokeFunctionName = this._expression instanceof PEG.Grammar.Sequence
     ? "apply"
     : "call";
diff --git a/lib/metagrammar.js b/lib/metagrammar.js
index d76f9d6..96c8134 100644
--- a/lib/metagrammar.js
+++ b/lib/metagrammar.js
@@ -81,9 +81,9 @@ PEG.grammarParser = (function(){
         this._pos = savedPos0;
       }
       var result0 = result1 !== null
-        ? (function() { 
+        ? (function($1, $2) { 
           var result = {};
-          PEG.ArrayUtils.each((arguments[1]), function(rule) { result[rule.getName()] = rule; });
+          PEG.ArrayUtils.each($2, function(rule) { result[rule.getName()] = rule; });
           return result;
          }).apply(this, result1)
         : null;
@@ -153,8 +153,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos1;
       }
       var result5 = result6 !== null
-        ? (function() { 
-          return new PEG.Grammar.Rule((arguments[0]), (arguments[1]) !== "" ? (arguments[1]) : null, (arguments[3]));
+        ? (function($1, $2, $3, $4) { 
+          return new PEG.Grammar.Rule($1, $2 !== "" ? $2 : null, $4);
          }).apply(this, result6)
         : null;
       
@@ -246,13 +246,13 @@ PEG.grammarParser = (function(){
         this._pos = savedPos2;
       }
       var result14 = result15 !== null
-        ? (function() { 
-          return (arguments[1]).length > 0
-            ? new PEG.Grammar.Choice([(arguments[0])].concat(PEG.ArrayUtils.map(
-                (arguments[1]),
+        ? (function($1, $2) { 
+          return $2.length > 0
+            ? new PEG.Grammar.Choice([$1].concat(PEG.ArrayUtils.map(
+                $2,
                 function(element) { return element[1]; }
               )))
-            : (arguments[0]);
+            : $1;
          }).apply(this, result15)
         : null;
       
@@ -296,10 +296,10 @@ PEG.grammarParser = (function(){
         this._pos = savedPos4;
       }
       var result25 = result26 !== null
-        ? (function() { 
+        ? (function($1, $2) { 
               return new PEG.Grammar.Action(
-                (arguments[0]).length != 1 ? new PEG.Grammar.Sequence((arguments[0])) : (arguments[0])[0],
-                (arguments[1])
+                $1.length != 1 ? new PEG.Grammar.Sequence($1) : $1[0],
+                $2
               );
              }).apply(this, result26)
         : null;
@@ -313,7 +313,7 @@ PEG.grammarParser = (function(){
           var result24 = this._parse_prefixed(context);
         }
         var result22 = result23 !== null
-          ? (function() {  return (arguments[0]).length != 1 ? new PEG.Grammar.Sequence((arguments[0])) : (arguments[0])[0];  }).call(this, result23)
+          ? (function($1) {  return $1.length != 1 ? new PEG.Grammar.Sequence($1) : $1[0];  }).call(this, result23)
           : null;
         if (result22 !== null) {
           var result21 = result22;
@@ -357,7 +357,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos6;
       }
       var result36 = result37 !== null
-        ? (function() {  return new PEG.Grammar.AndPredicate((arguments[1]));  }).apply(this, result37)
+        ? (function($1, $2) {  return new PEG.Grammar.AndPredicate($2);  }).apply(this, result37)
         : null;
       if (result36 !== null) {
         var result30 = result36;
@@ -377,7 +377,7 @@ PEG.grammarParser = (function(){
           this._pos = savedPos5;
         }
         var result32 = result33 !== null
-          ? (function() {  return new PEG.Grammar.NotPredicate((arguments[1]));  }).apply(this, result33)
+          ? (function($1, $2) {  return new PEG.Grammar.NotPredicate($2);  }).apply(this, result33)
           : null;
         if (result32 !== null) {
           var result30 = result32;
@@ -426,7 +426,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos9;
       }
       var result50 = result51 !== null
-        ? (function() {  return new PEG.Grammar.Optional((arguments[0]));    }).apply(this, result51)
+        ? (function($1, $2) {  return new PEG.Grammar.Optional($1);    }).apply(this, result51)
         : null;
       if (result50 !== null) {
         var result40 = result50;
@@ -446,7 +446,7 @@ PEG.grammarParser = (function(){
           this._pos = savedPos8;
         }
         var result46 = result47 !== null
-          ? (function() {  return new PEG.Grammar.ZeroOrMore((arguments[0]));  }).apply(this, result47)
+          ? (function($1, $2) {  return new PEG.Grammar.ZeroOrMore($1);  }).apply(this, result47)
           : null;
         if (result46 !== null) {
           var result40 = result46;
@@ -466,7 +466,7 @@ PEG.grammarParser = (function(){
             this._pos = savedPos7;
           }
           var result42 = result43 !== null
-            ? (function() {  return new PEG.Grammar.OneOrMore((arguments[0]));   }).apply(this, result43)
+            ? (function($1, $2) {  return new PEG.Grammar.OneOrMore($1);   }).apply(this, result43)
             : null;
           if (result42 !== null) {
             var result40 = result42;
@@ -557,28 +557,28 @@ PEG.grammarParser = (function(){
         this._pos = savedPos11;
       }
       var result66 = result67 !== null
-        ? (function() {  return new PEG.Grammar.RuleRef((arguments[0]));  }).apply(this, result67)
+        ? (function($1, $2) {  return new PEG.Grammar.RuleRef($1);  }).apply(this, result67)
         : null;
       if (result66 !== null) {
         var result54 = result66;
       } else {
         var result65 = this._parse_literal(context);
         var result64 = result65 !== null
-          ? (function() {  return new PEG.Grammar.Literal((arguments[0]));  }).call(this, result65)
+          ? (function($1) {  return new PEG.Grammar.Literal($1);  }).call(this, result65)
           : null;
         if (result64 !== null) {
           var result54 = result64;
         } else {
           var result63 = this._parse_dot(context);
           var result62 = result63 !== null
-            ? (function() {  return new PEG.Grammar.Any();        }).call(this, result63)
+            ? (function($1) {  return new PEG.Grammar.Any();        }).call(this, result63)
             : null;
           if (result62 !== null) {
             var result54 = result62;
           } else {
             var result61 = this._parse_class(context);
             var result60 = result61 !== null
-              ? (function() {  return new PEG.Grammar.Class((arguments[0]));    }).call(this, result61)
+              ? (function($1) {  return new PEG.Grammar.Class($1);    }).call(this, result61)
               : null;
             if (result60 !== null) {
               var result54 = result60;
@@ -604,7 +604,7 @@ PEG.grammarParser = (function(){
                 this._pos = savedPos10;
               }
               var result55 = result56 !== null
-                ? (function() {  return (arguments[1]);  }).apply(this, result56)
+                ? (function($1, $2, $3) {  return $2;  }).apply(this, result56)
                 : null;
               if (result55 !== null) {
                 var result54 = result55;
@@ -652,7 +652,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos14;
       }
       var result75 = result76 !== null
-        ? (function() {  return (arguments[0]).substr(1, (arguments[0]).length - 2);  }).apply(this, result76)
+        ? (function($1, $2) {  return $1.substr(1, $1.length - 2);  }).apply(this, result76)
         : null;
       context.reportMatchFailures = savedReportMatchFailures;
       if (context.reportMatchFailures && result75 === null) {
@@ -739,7 +739,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos15;
       }
       var result79 = result80 !== null
-        ? (function() {  return (arguments[0]) + (arguments[1]).join("") + (arguments[2]);  }).apply(this, result80)
+        ? (function($1, $2, $3) {  return $1 + $2.join("") + $3;  }).apply(this, result80)
         : null;
       
       
@@ -773,7 +773,7 @@ PEG.grammarParser = (function(){
         var result88 = null;
       }
       var result87 = result88 !== null
-        ? (function() {  return (arguments[0]).join("");  }).call(this, result88)
+        ? (function($1) {  return $1.join("");  }).call(this, result88)
         : null;
       
       
@@ -806,7 +806,7 @@ PEG.grammarParser = (function(){
         }
       }
       var result90 = result91 !== null
-        ? (function() {  return (arguments[0]);  }).call(this, result91)
+        ? (function($1) {  return $1;  }).call(this, result91)
         : null;
       
       
@@ -852,7 +852,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos16;
       }
       var result92 = result93 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result93)
+        ? (function($1, $2) {  return $1;  }).apply(this, result93)
         : null;
       
       
@@ -898,7 +898,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos17;
       }
       var result96 = result97 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result97)
+        ? (function($1, $2) {  return $1;  }).apply(this, result97)
         : null;
       
       
@@ -944,7 +944,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos18;
       }
       var result100 = result101 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result101)
+        ? (function($1, $2) {  return $1;  }).apply(this, result101)
         : null;
       
       
@@ -990,7 +990,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos19;
       }
       var result104 = result105 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result105)
+        ? (function($1, $2) {  return $1;  }).apply(this, result105)
         : null;
       
       
@@ -1036,7 +1036,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos20;
       }
       var result108 = result109 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result109)
+        ? (function($1, $2) {  return $1;  }).apply(this, result109)
         : null;
       
       
@@ -1082,7 +1082,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos21;
       }
       var result112 = result113 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result113)
+        ? (function($1, $2) {  return $1;  }).apply(this, result113)
         : null;
       
       
@@ -1128,7 +1128,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos22;
       }
       var result116 = result117 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result117)
+        ? (function($1, $2) {  return $1;  }).apply(this, result117)
         : null;
       
       
@@ -1174,7 +1174,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos23;
       }
       var result120 = result121 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result121)
+        ? (function($1, $2) {  return $1;  }).apply(this, result121)
         : null;
       
       
@@ -1220,7 +1220,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos24;
       }
       var result124 = result125 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result125)
+        ? (function($1, $2) {  return $1;  }).apply(this, result125)
         : null;
       
       
@@ -1266,7 +1266,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos25;
       }
       var result128 = result129 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result129)
+        ? (function($1, $2) {  return $1;  }).apply(this, result129)
         : null;
       
       
@@ -1419,8 +1419,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos26;
       }
       var result132 = result133 !== null
-        ? (function() { 
-          return (arguments[0]) + (arguments[1]).join("");
+        ? (function($1, $2, $3) { 
+          return $1 + $2.join("");
          }).apply(this, result133)
         : null;
       context.reportMatchFailures = savedReportMatchFailures;
@@ -1472,7 +1472,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos27;
       }
       var result145 = result146 !== null
-        ? (function() {  return (arguments[0]);  }).apply(this, result146)
+        ? (function($1, $2) {  return $1;  }).apply(this, result146)
         : null;
       context.reportMatchFailures = savedReportMatchFailures;
       if (context.reportMatchFailures && result145 === null) {
@@ -1539,7 +1539,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos28;
       }
       var result151 = result152 !== null
-        ? (function() {  return (arguments[1]).join("");  }).apply(this, result152)
+        ? (function($1, $2, $3) {  return $2.join("");  }).apply(this, result152)
         : null;
       
       
@@ -1678,7 +1678,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos29;
       }
       var result164 = result165 !== null
-        ? (function() {  return (arguments[1]);  }).apply(this, result165)
+        ? (function($1, $2) {  return $2;  }).apply(this, result165)
         : null;
       
       
@@ -1743,7 +1743,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos31;
       }
       var result172 = result173 !== null
-        ? (function() {  return (arguments[1]).join("");  }).apply(this, result173)
+        ? (function($1, $2, $3) {  return $2.join("");  }).apply(this, result173)
         : null;
       
       
@@ -1882,7 +1882,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos32;
       }
       var result185 = result186 !== null
-        ? (function() {  return (arguments[1]);  }).apply(this, result186)
+        ? (function($1, $2) {  return $2;  }).apply(this, result186)
         : null;
       
       
@@ -1989,8 +1989,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos34;
       }
       var result193 = result194 !== null
-        ? (function() { 
-          return (arguments[1]) + (arguments[2]).join("");
+        ? (function($1, $2, $3, $4, $5) { 
+          return $2 + $3.join("");
          }).apply(this, result194)
         : null;
       context.reportMatchFailures = savedReportMatchFailures;
@@ -2045,20 +2045,20 @@ PEG.grammarParser = (function(){
         this._pos = savedPos35;
       }
       var result204 = result205 !== null
-        ? (function() { 
-          if ((arguments[0]).charCodeAt(0) > (arguments[2]).charCodeAt(0)) {
+        ? (function($1, $2, $3) { 
+          if ($1.charCodeAt(0) > $3.charCodeAt(0)) {
             throw new this.SyntaxError(
               "Invalid character range: "
-                + PEG.RegExpUtils.quoteForClass((arguments[0]))
+                + PEG.RegExpUtils.quoteForClass($1)
                 + "-"
-                + PEG.RegExpUtils.quoteForClass((arguments[2]))
+                + PEG.RegExpUtils.quoteForClass($3)
                 + "."
             );
           }
         
-          return PEG.RegExpUtils.quoteForClass((arguments[0]))
+          return PEG.RegExpUtils.quoteForClass($1)
             + "-"
-            + PEG.RegExpUtils.quoteForClass((arguments[2]));
+            + PEG.RegExpUtils.quoteForClass($3);
          }).apply(this, result205)
         : null;
       
@@ -2084,8 +2084,8 @@ PEG.grammarParser = (function(){
       
       var result210 = this._parse_bracketDelimitedCharacter(context);
       var result209 = result210 !== null
-        ? (function() { 
-          return PEG.RegExpUtils.quoteForClass((arguments[0]));
+        ? (function($1) { 
+          return PEG.RegExpUtils.quoteForClass($1);
          }).call(this, result210)
         : null;
       
@@ -2225,7 +2225,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos36;
       }
       var result218 = result219 !== null
-        ? (function() {  return (arguments[1]);  }).apply(this, result219)
+        ? (function($1, $2) {  return $2;  }).apply(this, result219)
         : null;
       
       
@@ -2331,8 +2331,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos38;
       }
       var result226 = result227 !== null
-        ? (function() { 
-          return (arguments[2])
+        ? (function($1, $2, $3) { 
+          return $3
             .replace("b", "\b")
             .replace("f", "\f")
             .replace("n", "\n")
@@ -2395,7 +2395,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos40;
       }
       var result236 = result237 !== null
-        ? (function() {  return "\0";  }).apply(this, result237)
+        ? (function($1, $2) {  return "\0";  }).apply(this, result237)
         : null;
       
       
@@ -2447,8 +2447,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos42;
       }
       var result241 = result242 !== null
-        ? (function() { 
-          return String.fromCharCode(parseInt("0x" + (arguments[1]) + (arguments[2])));
+        ? (function($1, $2, $3) { 
+          return String.fromCharCode(parseInt("0x" + $2 + $3));
          }).apply(this, result242)
         : null;
       
@@ -2513,8 +2513,8 @@ PEG.grammarParser = (function(){
         this._pos = savedPos43;
       }
       var result246 = result247 !== null
-        ? (function() { 
-          return String.fromCharCode(parseInt("0x" + (arguments[1]) + (arguments[2]) + (arguments[3]) + (arguments[4])));
+        ? (function($1, $2, $3, $4, $5) { 
+          return String.fromCharCode(parseInt("0x" + $2 + $3 + $4 + $5));
          }).apply(this, result247)
         : null;
       
@@ -2561,7 +2561,7 @@ PEG.grammarParser = (function(){
         this._pos = savedPos44;
       }
       var result253 = result254 !== null
-        ? (function() {  return (arguments[1]);  }).apply(this, result254)
+        ? (function($1, $2) {  return $2;  }).apply(this, result254)
         : null;
       
       
diff --git a/test/compiler-test.js b/test/compiler-test.js
index fb4899a..654ec58 100644
--- a/test/compiler-test.js
+++ b/test/compiler-test.js
@@ -61,6 +61,21 @@ global.doesNotParseWithPos = function(parser, input, line, column) {
 
 module("PEG.ArrayUtils");
 
+test("range", function() {
+  deepEqual(PEG.ArrayUtils.range(-1), []);
+  deepEqual(PEG.ArrayUtils.range(0), []);
+  deepEqual(PEG.ArrayUtils.range(1), [0]);
+  deepEqual(PEG.ArrayUtils.range(2), [0, 1]);
+  deepEqual(PEG.ArrayUtils.range(3), [0, 1, 2]);
+
+  deepEqual(PEG.ArrayUtils.range(0, -1), []);
+  deepEqual(PEG.ArrayUtils.range(0, 0), []);
+  deepEqual(PEG.ArrayUtils.range(0, 1), [0]);
+  deepEqual(PEG.ArrayUtils.range(0, 2), [0, 1]);
+  deepEqual(PEG.ArrayUtils.range(0, 3), [0, 1, 2]);
+  deepEqual(PEG.ArrayUtils.range(-3, 0), [-3, -2, -1]);
+});
+
 test("contains", function() {
   ok(!PEG.ArrayUtils.contains([], 42));