diff --git a/lib/coffee-script.js b/lib/coffee-script.js
index 309e8d14..be7e4ec0 100755
--- a/lib/coffee-script.js
+++ b/lib/coffee-script.js
@@ -66,8 +66,8 @@
   lexer = new Lexer;
   parser.lexer = {
     lex: function() {
-      var tag, _ref;
-      _ref = this.tokens[this.pos++] || [''], tag = _ref[0], this.yytext = _ref[1], this.yylineno = _ref[2];
+      var tag, _ref2;
+      _ref2 = this.tokens[this.pos++] || [''], tag = _ref2[0], this.yytext = _ref2[1], this.yylineno = _ref2[2];
       return tag;
     },
     setInput: function(tokens) {
diff --git a/lib/command.js b/lib/command.js
index 10a1477b..28cc0aea 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -66,13 +66,13 @@
           return fs.stat(source, function(err, stats) {
             if (stats.isDirectory()) {
               return fs.readdir(source, function(err, files) {
-                var file, _i, _len, _results;
-                _results = [];
-                for (_i = 0, _len = files.length; _i < _len; _i++) {
-                  file = files[_i];
-                  _results.push(compile(path.join(source, file)));
+                var file, _j, _len2, _results2;
+                _results2 = [];
+                for (_j = 0, _len2 = files.length; _j < _len2; _j++) {
+                  file = files[_j];
+                  _results2.push(compile(path.join(source, file)));
                 }
-                return _results;
+                return _results2;
               });
             } else if (topLevel || path.extname(source) === '.coffee') {
               fs.readFile(source, function(err, code) {
@@ -155,12 +155,12 @@
     return compileScript("concatenation", code, "concatenation");
   };
   loadRequires = function() {
-    var realFilename, req, _i, _len, _ref;
+    var realFilename, req, _i, _len, _ref2;
     realFilename = module.filename;
     module.filename = '.';
-    _ref = opts.require;
-    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-      req = _ref[_i];
+    _ref2 = opts.require;
+    for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+      req = _ref2[_i];
       require(req);
     }
     return module.filename = realFilename;
@@ -223,11 +223,11 @@
   printTokens = function(tokens) {
     var strings, tag, token, value;
     strings = (function() {
-      var _i, _len, _ref, _results;
+      var _i, _len, _ref2, _results;
       _results = [];
       for (_i = 0, _len = tokens.length; _i < _len; _i++) {
         token = tokens[_i];
-        _ref = [token[0], token[1].toString().replace(/\n/, '\\n')], tag = _ref[0], value = _ref[1];
+        _ref2 = [token[0], token[1].toString().replace(/\n/, '\\n')], tag = _ref2[0], value = _ref2[1];
         _results.push("[" + tag + " " + value + "]");
       }
       return _results;
diff --git a/lib/lexer.js b/lib/lexer.js
index 8fdee451..581baa71 100644
--- a/lib/lexer.js
+++ b/lib/lexer.js
@@ -37,7 +37,7 @@
       return (new Rewriter).rewrite(this.tokens);
     };
     Lexer.prototype.identifierToken = function() {
-      var colon, forcedIdentifier, id, input, match, prev, tag, _ref, _ref2;
+      var colon, forcedIdentifier, id, input, match, prev, tag, _ref2, _ref3;
       if (!(match = IDENTIFIER.exec(this.chunk))) {
         return 0;
       }
@@ -46,11 +46,11 @@
         this.token('OWN', id);
         return id.length;
       }
-      forcedIdentifier = colon || (prev = last(this.tokens)) && (((_ref = prev[0]) === '.' || _ref === '?.' || _ref === '::') || !prev.spaced && prev[0] === '@');
+      forcedIdentifier = colon || (prev = last(this.tokens)) && (((_ref2 = prev[0]) === '.' || _ref2 === '?.' || _ref2 === '::') || !prev.spaced && prev[0] === '@');
       tag = 'IDENTIFIER';
       if (__indexOf.call(JS_KEYWORDS, id) >= 0 || !forcedIdentifier && __indexOf.call(COFFEE_KEYWORDS, id) >= 0) {
         tag = id.toUpperCase();
-        if (tag === 'WHEN' && (_ref2 = this.tag(), __indexOf.call(LINE_BREAK, _ref2) >= 0)) {
+        if (tag === 'WHEN' && (_ref3 = this.tag(), __indexOf.call(LINE_BREAK, _ref3) >= 0)) {
           tag = 'LEADING_WHEN';
         } else if (tag === 'FOR') {
           this.seenFor = true;
@@ -194,7 +194,7 @@
       return script.length;
     };
     Lexer.prototype.regexToken = function() {
-      var match, prev, regex, _ref;
+      var match, prev, regex, _ref2;
       if (this.chunk.charAt(0) !== '/') {
         return 0;
       }
@@ -202,7 +202,7 @@
         return this.heregexToken(match);
       }
       prev = last(this.tokens);
-      if (prev && (_ref = prev[0], __indexOf.call((prev.spaced ? NOT_REGEX : NOT_SPACED_REGEX), _ref) >= 0)) {
+      if (prev && (_ref2 = prev[0], __indexOf.call((prev.spaced ? NOT_REGEX : NOT_SPACED_REGEX), _ref2) >= 0)) {
         return 0;
       }
       if (!(match = REGEX.exec(this.chunk))) {
@@ -213,7 +213,7 @@
       return regex.length;
     };
     Lexer.prototype.heregexToken = function(match) {
-      var body, flags, heregex, re, tag, tokens, value, _i, _len, _ref, _ref2, _ref3, _ref4;
+      var body, flags, heregex, re, tag, tokens, value, _i, _len, _ref2, _ref3, _ref4, _ref5;
       heregex = match[0], body = match[1], flags = match[2];
       if (0 > body.indexOf('#{')) {
         re = body.replace(HEREGEX_OMIT, '').replace(/\//g, '\\/');
@@ -223,11 +223,11 @@
       this.token('IDENTIFIER', 'RegExp');
       this.tokens.push(['CALL_START', '(']);
       tokens = [];
-      _ref = this.interpolateString(body, {
+      _ref2 = this.interpolateString(body, {
         regex: true
       });
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        _ref2 = _ref[_i], tag = _ref2[0], value = _ref2[1];
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        _ref3 = _ref2[_i], tag = _ref3[0], value = _ref3[1];
         if (tag === 'TOKENS') {
           tokens.push.apply(tokens, value);
         } else {
@@ -240,10 +240,10 @@
         tokens.push(['+', '+']);
       }
       tokens.pop();
-      if (((_ref3 = tokens[0]) != null ? _ref3[0] : void 0) !== 'STRING') {
+      if (((_ref4 = tokens[0]) != null ? _ref4[0] : void 0) !== 'STRING') {
         this.tokens.push(['STRING', '""'], ['+', '+']);
       }
-      (_ref4 = this.tokens).push.apply(_ref4, tokens);
+      (_ref5 = this.tokens).push.apply(_ref5, tokens);
       if (flags) {
         this.tokens.push([',', ','], ['STRING', '"' + flags + '"']);
       }
@@ -340,7 +340,7 @@
       return this;
     };
     Lexer.prototype.literalToken = function() {
-      var match, prev, tag, value, _ref, _ref2, _ref3, _ref4;
+      var match, prev, tag, value, _ref2, _ref3, _ref4, _ref5;
       if (match = OPERATOR.exec(this.chunk)) {
         value = match[0];
         if (CODE.test(value)) {
@@ -352,10 +352,10 @@
       tag = value;
       prev = last(this.tokens);
       if (value === '=' && prev) {
-        if (!prev[1].reserved && (_ref = prev[1], __indexOf.call(JS_FORBIDDEN, _ref) >= 0)) {
+        if (!prev[1].reserved && (_ref2 = prev[1], __indexOf.call(JS_FORBIDDEN, _ref2) >= 0)) {
           this.assignmentError();
         }
-        if ((_ref2 = prev[1]) === '||' || _ref2 === '&&') {
+        if ((_ref3 = prev[1]) === '||' || _ref3 === '&&') {
           prev[0] = 'COMPOUND_ASSIGN';
           prev[1] += '=';
           return value.length;
@@ -376,12 +376,12 @@
       } else if (__indexOf.call(LOGIC, value) >= 0 || value === '?' && (prev != null ? prev.spaced : void 0)) {
         tag = 'LOGIC';
       } else if (prev && !prev.spaced) {
-        if (value === '(' && (_ref3 = prev[0], __indexOf.call(CALLABLE, _ref3) >= 0)) {
+        if (value === '(' && (_ref4 = prev[0], __indexOf.call(CALLABLE, _ref4) >= 0)) {
           if (prev[0] === '?') {
             prev[0] = 'FUNC_EXIST';
           }
           tag = 'CALL_START';
-        } else if (value === '[' && (_ref4 = prev[0], __indexOf.call(INDEXABLE, _ref4) >= 0)) {
+        } else if (value === '[' && (_ref5 = prev[0], __indexOf.call(INDEXABLE, _ref5) >= 0)) {
           tag = 'INDEX_START';
           switch (prev[0]) {
             case '?':
@@ -396,7 +396,7 @@
       return value.length;
     };
     Lexer.prototype.sanitizeHeredoc = function(doc, options) {
-      var attempt, herecomment, indent, match, _ref;
+      var attempt, herecomment, indent, match, _ref2;
       indent = options.indent, herecomment = options.herecomment;
       if (herecomment) {
         if (HEREDOC_ILLEGAL.test(doc)) {
@@ -408,7 +408,7 @@
       } else {
         while (match = HEREDOC_INDENT.exec(doc)) {
           attempt = match[1];
-          if (indent === null || (0 < (_ref = attempt.length) && _ref < indent.length)) {
+          if (indent === null || (0 < (_ref2 = attempt.length) && _ref2 < indent.length)) {
             indent = attempt;
           }
         }
@@ -457,9 +457,9 @@
       throw SyntaxError("Reserved word \"" + (this.value()) + "\" on line " + (this.line + 1) + " can't be assigned");
     };
     Lexer.prototype.balancedString = function(str, end) {
-      var i, letter, prev, stack, _ref;
+      var i, letter, prev, stack, _ref2;
       stack = [end];
-      for (i = 1, _ref = str.length; 1 <= _ref ? i < _ref : i > _ref; 1 <= _ref ? i++ : i--) {
+      for (i = 1, _ref2 = str.length; 1 <= _ref2 ? i < _ref2 : i > _ref2; 1 <= _ref2 ? i++ : i--) {
         switch (letter = str.charAt(i)) {
           case '\\':
             i++;
@@ -484,7 +484,7 @@
       throw new Error("missing " + (stack.pop()) + ", starting on line " + (this.line + 1));
     };
     Lexer.prototype.interpolateString = function(str, options) {
-      var expr, heredoc, i, inner, interpolated, len, letter, nested, pi, regex, tag, tokens, value, _len, _ref, _ref2, _ref3;
+      var expr, heredoc, i, inner, interpolated, len, letter, nested, pi, regex, tag, tokens, value, _len, _ref2, _ref3, _ref4;
       if (options == null) {
         options = {};
       }
@@ -510,7 +510,7 @@
             rewrite: false
           });
           nested.pop();
-          if (((_ref = nested[0]) != null ? _ref[0] : void 0) === 'TERMINATOR') {
+          if (((_ref2 = nested[0]) != null ? _ref2[0] : void 0) === 'TERMINATOR') {
             nested.shift();
           }
           if (len = nested.length) {
@@ -540,12 +540,12 @@
         this.token('(', '(');
       }
       for (i = 0, _len = tokens.length; i < _len; i++) {
-        _ref2 = tokens[i], tag = _ref2[0], value = _ref2[1];
+        _ref3 = tokens[i], tag = _ref3[0], value = _ref3[1];
         if (i) {
           this.token('+', '+');
         }
         if (tag === 'TOKENS') {
-          (_ref3 = this.tokens).push.apply(_ref3, value);
+          (_ref4 = this.tokens).push.apply(_ref4, value);
         } else {
           this.token('STRING', this.makeString(value, '"', heredoc));
         }
diff --git a/lib/nodes.js b/lib/nodes.js
index 2dbca7ad..dc535726 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -63,9 +63,9 @@
       }
     };
     Base.prototype.compileLoopReference = function(o, name) {
-      var src, tmp, _ref;
+      var src, tmp, _ref2;
       src = tmp = this.compile(o, LEVEL_LIST);
-      if (!((-Infinity < (_ref = +src) && _ref < Infinity) || IDENTIFIER.test(src) && o.scope.check(src, true))) {
+      if (!((-Infinity < (_ref2 = +src) && _ref2 < Infinity) || IDENTIFIER.test(src) && o.scope.check(src, true))) {
         src = "" + (tmp = o.scope.freeVariable(name)) + " = " + src;
       }
       return [src, tmp];
@@ -117,17 +117,17 @@
       return tree;
     };
     Base.prototype.eachChild = function(func) {
-      var attr, child, _i, _j, _len, _len2, _ref, _ref2;
+      var attr, child, _i, _j, _len, _len2, _ref2, _ref3;
       if (!this.children) {
         return this;
       }
-      _ref = this.children;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        attr = _ref[_i];
+      _ref2 = this.children;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        attr = _ref2[_i];
         if (this[attr]) {
-          _ref2 = flatten([this[attr]]);
-          for (_j = 0, _len2 = _ref2.length; _j < _len2; _j++) {
-            child = _ref2[_j];
+          _ref3 = flatten([this[attr]]);
+          for (_j = 0, _len2 = _ref3.length; _j < _len2; _j++) {
+            child = _ref3[_j];
             if (func(child) === false) {
               return this;
             }
@@ -194,10 +194,10 @@
       return !this.expressions.length;
     };
     Block.prototype.isStatement = function(o) {
-      var exp, _i, _len, _ref;
-      _ref = this.expressions;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        exp = _ref[_i];
+      var exp, _i, _len, _ref2;
+      _ref2 = this.expressions;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        exp = _ref2[_i];
         if (exp.isStatement(o)) {
           return true;
         }
@@ -205,10 +205,10 @@
       return false;
     };
     Block.prototype.jumps = function(o) {
-      var exp, _i, _len, _ref;
-      _ref = this.expressions;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        exp = _ref[_i];
+      var exp, _i, _len, _ref2;
+      _ref2 = this.expressions;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        exp = _ref2[_i];
         if (exp.jumps(o)) {
           return exp;
         }
@@ -240,13 +240,13 @@
       }
     };
     Block.prototype.compileNode = function(o) {
-      var code, codes, node, top, _i, _len, _ref;
+      var code, codes, node, top, _i, _len, _ref2;
       this.tab = o.indent;
       top = o.level === LEVEL_TOP;
       codes = [];
-      _ref = this.expressions;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        node = _ref[_i];
+      _ref2 = this.expressions;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        node = _ref2[_i];
         node = node.unwrapAll();
         node = node.unfoldSoak(o) || node;
         if (top) {
@@ -280,11 +280,11 @@
       }
     };
     Block.prototype.compileWithDeclarations = function(o) {
-      var code, exp, i, post, rest, scope, _len, _ref;
+      var code, exp, i, post, rest, scope, _len, _ref2;
       code = post = '';
-      _ref = this.expressions;
-      for (i = 0, _len = _ref.length; i < _len; i++) {
-        exp = _ref[i];
+      _ref2 = this.expressions;
+      for (i = 0, _len = _ref2.length; i < _len; i++) {
+        exp = _ref2[i];
         exp = exp.unwrap();
         if (!(exp instanceof Comment || exp instanceof Literal)) {
           break;
@@ -334,8 +334,8 @@
       return IDENTIFIER.test(this.value);
     };
     Literal.prototype.isStatement = function() {
-      var _ref;
-      return (_ref = this.value) === 'break' || _ref === 'continue' || _ref === 'debugger';
+      var _ref2;
+      return (_ref2 = this.value) === 'break' || _ref2 === 'continue' || _ref2 === 'debugger';
     };
     Literal.prototype.isComplex = NO;
     Literal.prototype.assigns = function(name) {
@@ -377,8 +377,8 @@
     Return.prototype.makeReturn = THIS;
     Return.prototype.jumps = THIS;
     Return.prototype.compile = function(o, level) {
-      var expr, _ref;
-      expr = (_ref = this.expression) != null ? _ref.makeReturn() : void 0;
+      var expr, _ref2;
+      expr = (_ref2 = this.expression) != null ? _ref2.makeReturn() : void 0;
       if (expr && !(expr instanceof Return)) {
         return expr.compile(o, level);
       } else {
@@ -424,10 +424,10 @@
       return this.base instanceof Literal && SIMPLENUM.test(this.base.value);
     };
     Value.prototype.isAtomic = function() {
-      var node, _i, _len, _ref;
-      _ref = this.properties.concat(this.base);
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        node = _ref[_i];
+      var node, _i, _len, _ref2;
+      _ref2 = this.properties.concat(this.base);
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        node = _ref2[_i];
         if (node.soak || node instanceof Call) {
           return false;
         }
@@ -502,14 +502,14 @@
       return code;
     };
     Value.prototype.unfoldSoak = function(o) {
-      var fst, i, ifn, prop, ref, snd, _len, _ref;
+      var fst, i, ifn, prop, ref, snd, _len, _ref2;
       if (ifn = this.base.unfoldSoak(o)) {
         Array.prototype.push.apply(ifn.body.properties, this.properties);
         return ifn;
       }
-      _ref = this.properties;
-      for (i = 0, _len = _ref.length; i < _len; i++) {
-        prop = _ref[i];
+      _ref2 = this.properties;
+      for (i = 0, _len = _ref2.length; i < _len; i++) {
+        prop = _ref2[i];
         if (prop.soak) {
           prop.soak = false;
           fst = new Value(this.base, this.properties.slice(0, i));
@@ -582,13 +582,13 @@
       }
     };
     Call.prototype.unfoldSoak = function(o) {
-      var call, ifn, left, list, rite, _i, _len, _ref, _ref2;
+      var call, ifn, left, list, rite, _i, _len, _ref2, _ref3;
       if (this.soak) {
         if (this.variable) {
           if (ifn = unfoldSoak(o, this, 'variable')) {
             return ifn;
           }
-          _ref = new Value(this.variable).cacheReference(o), left = _ref[0], rite = _ref[1];
+          _ref2 = new Value(this.variable).cacheReference(o), left = _ref2[0], rite = _ref2[1];
         } else {
           left = new Literal(this.superReference(o));
           rite = new Value(left);
@@ -616,9 +616,9 @@
           break;
         }
       }
-      _ref2 = list.reverse();
-      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
-        call = _ref2[_i];
+      _ref3 = list.reverse();
+      for (_i = 0, _len = _ref3.length; _i < _len; _i++) {
+        call = _ref3[_i];
         if (ifn) {
           if (call.variable instanceof Call) {
             call.variable = ifn;
@@ -631,7 +631,7 @@
       return ifn;
     };
     Call.prototype.filterImplicitObjects = function(list) {
-      var node, nodes, obj, prop, properties, _i, _j, _len, _len2, _ref;
+      var node, nodes, obj, prop, properties, _i, _j, _len, _len2, _ref2;
       nodes = [];
       for (_i = 0, _len = list.length; _i < _len; _i++) {
         node = list[_i];
@@ -640,9 +640,9 @@
           continue;
         }
         obj = null;
-        _ref = node.base.properties;
-        for (_j = 0, _len2 = _ref.length; _j < _len2; _j++) {
-          prop = _ref[_j];
+        _ref2 = node.base.properties;
+        for (_j = 0, _len2 = _ref2.length; _j < _len2; _j++) {
+          prop = _ref2[_j];
           if (prop instanceof Assign) {
             if (!obj) {
               nodes.push(obj = new Obj(properties = [], true));
@@ -657,9 +657,9 @@
       return nodes;
     };
     Call.prototype.compileNode = function(o) {
-      var arg, args, code, _ref;
-      if ((_ref = this.variable) != null) {
-        _ref.front = this.front;
+      var arg, args, code, _ref2;
+      if ((_ref2 = this.variable) != null) {
+        _ref2.front = this.front;
       }
       if (code = Splat.compileSplattedArray(o, this.args, true)) {
         return this.compileSplat(o, code);
@@ -766,13 +766,13 @@
       this.equals = this.exclusive ? '' : '=';
     }
     Range.prototype.compileVariables = function(o) {
-      var parts, _ref, _ref2, _ref3;
+      var parts, _ref2, _ref3, _ref4;
       o = merge(o, {
         top: true
       });
-      _ref = this.from.cache(o, LEVEL_LIST), this.from = _ref[0], this.fromVar = _ref[1];
-      _ref2 = this.to.cache(o, LEVEL_LIST), this.to = _ref2[0], this.toVar = _ref2[1];
-      _ref3 = [this.fromVar.match(SIMPLENUM), this.toVar.match(SIMPLENUM)], this.fromNum = _ref3[0], this.toNum = _ref3[1];
+      _ref2 = this.from.cache(o, LEVEL_LIST), this.from = _ref2[0], this.fromVar = _ref2[1];
+      _ref3 = this.to.cache(o, LEVEL_LIST), this.to = _ref3[0], this.toVar = _ref3[1];
+      _ref4 = [this.fromVar.match(SIMPLENUM), this.toVar.match(SIMPLENUM)], this.fromNum = _ref4[0], this.toNum = _ref4[1];
       parts = [];
       if (this.from !== this.fromVar) {
         parts.push(this.from);
@@ -799,8 +799,8 @@
       return "" + vars + "; " + compare + "; " + incr;
     };
     Range.prototype.compileSimple = function(o) {
-      var from, idx, step, to, _ref;
-      _ref = [+this.fromNum, +this.toNum], from = _ref[0], to = _ref[1];
+      var from, idx, step, to, _ref2;
+      _ref2 = [+this.fromNum, +this.toNum], from = _ref2[0], to = _ref2[1];
       idx = del(o, 'index');
       step = del(o, 'step');
       step && (step = "" + idx + " += " + (step.compile(o)));
@@ -811,11 +811,11 @@
       }
     };
     Range.prototype.compileArray = function(o) {
-      var body, clause, i, idt, post, pre, range, result, vars, _i, _ref, _ref2, _results;
+      var body, cond, i, idt, post, pre, range, result, vars, _i, _ref2, _ref3, _results;
       if (this.fromNum && this.toNum && Math.abs(this.fromNum - this.toNum) <= 20) {
         range = (function() {
           _results = [];
-          for (var _i = _ref = +this.fromNum, _ref2 = +this.toNum; _ref <= _ref2 ? _i <= _ref2 : _i >= _ref2; _ref <= _ref2 ? _i++ : _i--){ _results.push(_i); }
+          for (var _i = _ref2 = +this.fromNum, _ref3 = +this.toNum; _ref2 <= _ref3 ? _i <= _ref3 : _i >= _ref3; _ref2 <= _ref3 ? _i++ : _i--){ _results.push(_i); }
           return _results;
         }).apply(this, arguments);
         if (this.exclusive) {
@@ -832,8 +832,8 @@
         body = this.compileSimple(o);
       } else {
         vars = ("" + i + " = " + this.from) + (this.to !== this.toVar ? ", " + this.to : '');
-        clause = "" + this.fromVar + " <= " + this.toVar + " ?";
-        body = "var " + vars + "; " + clause + " " + i + " <" + this.equals + " " + this.toVar + " : " + i + " >" + this.equals + " " + this.toVar + "; " + clause + " " + i + "++ : " + i + "--";
+        cond = "" + this.fromVar + " <= " + this.toVar;
+        body = "var " + vars + "; " + cond + " ? " + i + " <" + this.equals + " " + this.toVar + " : " + i + " >" + this.equals + " " + this.toVar + "; " + cond + " ? " + i + "++ : " + i + "--";
       }
       post = "{ " + result + ".push(" + i + "); }\n" + idt + "return " + result + ";\n" + o.indent;
       return "(function() {" + pre + "\n" + idt + "for (" + body + ")" + post + "}).apply(this, arguments)";
@@ -848,8 +848,8 @@
       Slice.__super__.constructor.call(this);
     }
     Slice.prototype.compileNode = function(o) {
-      var compiled, from, fromStr, to, toStr, _ref;
-      _ref = this.range, to = _ref.to, from = _ref.from;
+      var compiled, from, fromStr, to, toStr, _ref2;
+      _ref2 = this.range, to = _ref2.to, from = _ref2.from;
       fromStr = from && from.compile(o, LEVEL_PAREN) || '0';
       compiled = to && to.compile(o, LEVEL_PAREN);
       if (to && !(!this.range.exclusive && +compiled === -1)) {
@@ -887,9 +887,9 @@
       idt = o.indent += TAB;
       lastNoncom = this.lastNonComment(this.properties);
       props = (function() {
-        var _len, _results;
+        var _len2, _results;
         _results = [];
-        for (i = 0, _len = props.length; i < _len; i++) {
+        for (i = 0, _len2 = props.length; i < _len2; i++) {
           prop = props[i];
           join = i === props.length - 1 ? '' : prop === lastNoncom || prop instanceof Comment ? '\n' : ',\n';
           indent = prop instanceof Comment ? '' : idt;
@@ -915,10 +915,10 @@
       }
     };
     Obj.prototype.assigns = function(name) {
-      var prop, _i, _len, _ref;
-      _ref = this.properties;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        prop = _ref[_i];
+      var prop, _i, _len, _ref2;
+      _ref2 = this.properties;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        prop = _ref2[_i];
         if (prop.assigns(name)) {
           return true;
         }
@@ -960,10 +960,10 @@
       }
     };
     Arr.prototype.assigns = function(name) {
-      var obj, _i, _len, _ref;
-      _ref = this.objects;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        obj = _ref[_i];
+      var obj, _i, _len, _ref2;
+      _ref2 = this.objects;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        obj = _ref2[_i];
         if (obj.assigns(name)) {
           return true;
         }
@@ -1006,12 +1006,12 @@
       });
     };
     Class.prototype.addBoundFunctions = function(o) {
-      var bname, bvar, _i, _len, _ref, _results;
+      var bname, bvar, _i, _len, _ref2, _results;
       if (this.boundFuncs.length) {
-        _ref = this.boundFuncs;
+        _ref2 = this.boundFuncs;
         _results = [];
-        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-          bvar = _ref[_i];
+        for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+          bvar = _ref2[_i];
           bname = bvar.compile(o);
           _results.push(this.ctor.body.unshift(new Literal("this." + bname + " = " + (utility('bind')) + "(this." + bname + ", this);")));
         }
@@ -1055,14 +1055,14 @@
     };
     Class.prototype.walkBody = function(name) {
       return this.traverseChildren(false, __bind(function(child) {
-        var exps, i, node, _len, _ref;
+        var exps, i, node, _len, _ref2;
         if (child instanceof Class) {
           return false;
         }
         if (child instanceof Block) {
-          _ref = exps = child.expressions;
-          for (i = 0, _len = _ref.length; i < _len; i++) {
-            node = _ref[i];
+          _ref2 = exps = child.expressions;
+          for (i = 0, _len = _ref2.length; i < _len; i++) {
+            node = _ref2[i];
             if (node instanceof Value && node.isObject(true)) {
               exps[i] = this.addProperties(node, name);
             }
@@ -1121,7 +1121,7 @@
       return unfoldSoak(o, this, 'variable');
     };
     Assign.prototype.compileNode = function(o) {
-      var isValue, match, name, val, _ref;
+      var isValue, match, name, val, _ref2;
       if (isValue = this.variable instanceof Value) {
         if (this.variable.isArray() || this.variable.isObject()) {
           return this.compilePatternMatch(o);
@@ -1129,7 +1129,7 @@
         if (this.variable.isSplice()) {
           return this.compileSplice(o);
         }
-        if ((_ref = this.context) === '||=' || _ref === '&&=' || _ref === '?=') {
+        if ((_ref2 = this.context) === '||=' || _ref2 === '&&=' || _ref2 === '?=') {
           return this.compileConditional(o);
         }
       }
@@ -1162,7 +1162,7 @@
       }
     };
     Assign.prototype.compilePatternMatch = function(o) {
-      var acc, assigns, code, i, idx, isObject, ivar, obj, objects, olen, ref, rest, splat, top, val, value, vvar, _len, _ref, _ref2, _ref3, _ref4;
+      var acc, assigns, code, i, idx, isObject, ivar, obj, objects, olen, ref, rest, splat, top, val, value, vvar, _len, _ref2, _ref3, _ref4, _ref5;
       top = o.level === LEVEL_TOP;
       value = this.value;
       objects = this.variable.base.objects;
@@ -1180,10 +1180,10 @@
       isObject = this.variable.isObject();
       if (top && olen === 1 && !((obj = objects[0]) instanceof Splat)) {
         if (obj instanceof Assign) {
-          _ref = obj, idx = _ref.variable.base, obj = _ref.value;
+          _ref2 = obj, idx = _ref2.variable.base, obj = _ref2.value;
         } else {
           if (obj.base instanceof Parens) {
-            _ref2 = new Value(obj.unwrapAll()).cacheReference(o), obj = _ref2[0], idx = _ref2[1];
+            _ref3 = new Value(obj.unwrapAll()).cacheReference(o), obj = _ref3[0], idx = _ref3[1];
           } else {
             idx = isObject ? obj["this"] ? obj.properties[0].name : obj : new Literal(0);
           }
@@ -1205,10 +1205,10 @@
         idx = i;
         if (isObject) {
           if (obj instanceof Assign) {
-            _ref3 = obj, idx = _ref3.variable.base, obj = _ref3.value;
+            _ref4 = obj, idx = _ref4.variable.base, obj = _ref4.value;
           } else {
             if (obj.base instanceof Parens) {
-              _ref4 = new Value(obj.unwrapAll()).cacheReference(o), obj = _ref4[0], idx = _ref4[1];
+              _ref5 = new Value(obj.unwrapAll()).cacheReference(o), obj = _ref5[0], idx = _ref5[1];
             } else {
               idx = obj["this"] ? obj.properties[0].name : obj;
             }
@@ -1252,15 +1252,15 @@
       }
     };
     Assign.prototype.compileConditional = function(o) {
-      var left, rite, _ref;
-      _ref = this.variable.cacheReference(o), left = _ref[0], rite = _ref[1];
+      var left, rite, _ref2;
+      _ref2 = this.variable.cacheReference(o), left = _ref2[0], rite = _ref2[1];
       return new Op(this.context.slice(0, -1), left, new Assign(rite, this.value, '=')).compile(o);
     };
     Assign.prototype.compileSplice = function(o) {
-      var code, exclusive, from, fromDecl, fromRef, name, to, valDef, valRef, _ref, _ref2, _ref3;
-      _ref = this.variable.properties.pop().range, from = _ref.from, to = _ref.to, exclusive = _ref.exclusive;
+      var code, exclusive, from, fromDecl, fromRef, name, to, valDef, valRef, _ref2, _ref3, _ref4;
+      _ref2 = this.variable.properties.pop().range, from = _ref2.from, to = _ref2.to, exclusive = _ref2.exclusive;
       name = this.variable.compile(o);
-      _ref2 = (from != null ? from.cache(o, LEVEL_OP) : void 0) || ['0', '0'], fromDecl = _ref2[0], fromRef = _ref2[1];
+      _ref3 = (from != null ? from.cache(o, LEVEL_OP) : void 0) || ['0', '0'], fromDecl = _ref3[0], fromRef = _ref3[1];
       if (to) {
         if ((from != null ? from.isSimpleNumber() : void 0) && to.isSimpleNumber()) {
           to = +to.compile(o) - +fromRef;
@@ -1276,7 +1276,7 @@
       } else {
         to = "9e9";
       }
-      _ref3 = this.value.cache(o, LEVEL_LIST), valDef = _ref3[0], valRef = _ref3[1];
+      _ref4 = this.value.cache(o, LEVEL_LIST), valDef = _ref4[0], valRef = _ref4[1];
       code = "[].splice.apply(" + name + ", [" + fromDecl + ", " + to + "].concat(" + valDef + ")), " + valRef;
       if (o.level > LEVEL_TOP) {
         return "(" + code + ")";
@@ -1302,7 +1302,7 @@
     };
     Code.prototype.jumps = NO;
     Code.prototype.compileNode = function(o) {
-      var code, exprs, i, idt, lit, p, param, ref, splats, v, val, vars, wasEmpty, _i, _j, _len, _len2, _len3, _ref, _ref2, _ref3;
+      var code, exprs, i, idt, lit, p, param, ref, splats, v, val, vars, wasEmpty, _i, _j, _len, _len2, _len3, _ref2, _ref3, _ref4;
       o.scope = new Scope(o.scope, this.body, this);
       o.scope.shared = del(o, 'sharedScope');
       o.indent += TAB;
@@ -1310,19 +1310,19 @@
       delete o.globals;
       vars = [];
       exprs = [];
-      _ref = this.params;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        param = _ref[_i];
+      _ref2 = this.params;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        param = _ref2[_i];
         if (param.splat) {
           if (param.name.value) {
             o.scope.add(param.name.value, 'var');
           }
           splats = new Assign(new Value(new Arr((function() {
-            var _i, _len, _ref, _results;
-            _ref = this.params;
+            var _j, _len2, _ref3, _results;
+            _ref3 = this.params;
             _results = [];
-            for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-              p = _ref[_i];
+            for (_j = 0, _len2 = _ref3.length; _j < _len2; _j++) {
+              p = _ref3[_j];
               _results.push(p.asReference(o));
             }
             return _results;
@@ -1330,9 +1330,9 @@
           break;
         }
       }
-      _ref2 = this.params;
-      for (_j = 0, _len2 = _ref2.length; _j < _len2; _j++) {
-        param = _ref2[_j];
+      _ref3 = this.params;
+      for (_j = 0, _len2 = _ref3.length; _j < _len2; _j++) {
+        param = _ref3[_j];
         if (param.isComplex()) {
           val = ref = param.asReference(o);
           if (param.value) {
@@ -1358,7 +1358,7 @@
         exprs.unshift(splats);
       }
       if (exprs.length) {
-        (_ref3 = this.body.expressions).unshift.apply(_ref3, exprs);
+        (_ref4 = this.body.expressions).unshift.apply(_ref4, exprs);
       }
       if (!splats) {
         for (i = 0, _len3 = vars.length; i < _len3; i++) {
@@ -1477,11 +1477,11 @@
         return args[0] + (".concat(" + (args.slice(1).join(', ')) + ")");
       }
       base = (function() {
-        var _i, _len, _ref, _results;
-        _ref = list.slice(0, index);
+        var _i, _len2, _ref2, _results;
+        _ref2 = list.slice(0, index);
         _results = [];
-        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-          node = _ref[_i];
+        for (_i = 0, _len2 = _ref2.length; _i < _len2; _i++) {
+          node = _ref2[_i];
           _results.push(node.compile(o, LEVEL_LIST));
         }
         return _results;
@@ -1592,11 +1592,11 @@
       return !this.second;
     };
     Op.prototype.isChainable = function() {
-      var _ref;
-      return (_ref = this.operator) === '<' || _ref === '>' || _ref === '>=' || _ref === '<=' || _ref === '===' || _ref === '!==';
+      var _ref2;
+      return (_ref2 = this.operator) === '<' || _ref2 === '>' || _ref2 === '>=' || _ref2 === '<=' || _ref2 === '===' || _ref2 === '!==';
     };
     Op.prototype.invert = function() {
-      var allInvertable, curr, fst, op, _ref;
+      var allInvertable, curr, fst, op, _ref2;
       if (this.isChainable() && this.first.isChainable()) {
         allInvertable = true;
         curr = this;
@@ -1622,15 +1622,15 @@
         return this;
       } else if (this.second) {
         return new Parens(this).invert();
-      } else if (this.operator === '!' && (fst = this.first.unwrap()) instanceof Op && ((_ref = fst.operator) === '!' || _ref === 'in' || _ref === 'instanceof')) {
+      } else if (this.operator === '!' && (fst = this.first.unwrap()) instanceof Op && ((_ref2 = fst.operator) === '!' || _ref2 === 'in' || _ref2 === 'instanceof')) {
         return fst;
       } else {
         return new Op('!', this);
       }
     };
     Op.prototype.unfoldSoak = function(o) {
-      var _ref;
-      return ((_ref = this.operator) === '++' || _ref === '--' || _ref === 'delete') && unfoldSoak(o, this, 'first');
+      var _ref2;
+      return ((_ref2 = this.operator) === '++' || _ref2 === '--' || _ref2 === 'delete') && unfoldSoak(o, this, 'first');
     };
     Op.prototype.compileNode = function(o) {
       var code;
@@ -1652,8 +1652,8 @@
       }
     };
     Op.prototype.compileChain = function(o) {
-      var code, fst, shared, _ref;
-      _ref = this.first.second.cache(o), this.first.second = _ref[0], shared = _ref[1];
+      var code, fst, shared, _ref2;
+      _ref2 = this.first.second.cache(o), this.first.second = _ref2[0], shared = _ref2[1];
       fst = this.first.compile(o, LEVEL_OP);
       code = "" + fst + " " + (this.invert ? '&&' : '||') + " " + (shared.compile(o)) + " " + this.operator + " " + (this.second.compile(o, LEVEL_OP));
       return "(" + code + ")";
@@ -1707,15 +1707,15 @@
       }
     };
     In.prototype.compileOrTest = function(o) {
-      var cmp, cnj, i, item, ref, sub, tests, _ref, _ref2;
-      _ref = this.object.cache(o, LEVEL_OP), sub = _ref[0], ref = _ref[1];
-      _ref2 = this.negated ? [' !== ', ' && '] : [' === ', ' || '], cmp = _ref2[0], cnj = _ref2[1];
+      var cmp, cnj, i, item, ref, sub, tests, _ref2, _ref3;
+      _ref2 = this.object.cache(o, LEVEL_OP), sub = _ref2[0], ref = _ref2[1];
+      _ref3 = this.negated ? [' !== ', ' && '] : [' === ', ' || '], cmp = _ref3[0], cnj = _ref3[1];
       tests = (function() {
-        var _len, _ref, _results;
-        _ref = this.array.base.objects;
+        var _len, _ref4, _results;
+        _ref4 = this.array.base.objects;
         _results = [];
-        for (i = 0, _len = _ref.length; i < _len; i++) {
-          item = _ref[i];
+        for (i = 0, _len = _ref4.length; i < _len; i++) {
+          item = _ref4[i];
           _results.push((i ? ref : sub) + cmp + item.compile(o, LEVEL_OP));
         }
         return _results;
@@ -1731,8 +1731,8 @@
       }
     };
     In.prototype.compileLoopTest = function(o) {
-      var code, ref, sub, _ref;
-      _ref = this.object.cache(o, LEVEL_LIST), sub = _ref[0], ref = _ref[1];
+      var code, ref, sub, _ref2;
+      _ref2 = this.object.cache(o, LEVEL_LIST), sub = _ref2[0], ref = _ref2[1];
       code = utility('indexOf') + (".call(" + (this.array.compile(o, LEVEL_LIST)) + ", " + ref + ") ") + (this.negated ? '< 0' : '>= 0');
       if (sub === ref) {
         return code;
@@ -1760,8 +1760,8 @@
     Try.prototype.children = ['attempt', 'recovery', 'ensure'];
     Try.prototype.isStatement = YES;
     Try.prototype.jumps = function(o) {
-      var _ref;
-      return this.attempt.jumps(o) || ((_ref = this.recovery) != null ? _ref.jumps(o) : void 0);
+      var _ref2;
+      return this.attempt.jumps(o) || ((_ref2 = this.recovery) != null ? _ref2.jumps(o) : void 0);
     };
     Try.prototype.makeReturn = function() {
       if (this.attempt) {
@@ -1849,13 +1849,13 @@
   exports.For = For = (function() {
     __extends(For, Base);
     function For(body, source) {
-      var _ref;
+      var _ref2;
       this.source = source.source, this.guard = source.guard, this.step = source.step, this.name = source.name, this.index = source.index;
       this.body = Block.wrap([body]);
       this.own = !!source.own;
       this.object = !!source.object;
       if (this.object) {
-        _ref = [this.index, this.name], this.name = _ref[0], this.index = _ref[1];
+        _ref2 = [this.index, this.name], this.name = _ref2[0], this.index = _ref2[1];
       }
       if (this.index instanceof Value) {
         throw SyntaxError('index cannot be a pattern matching expression');
@@ -1878,9 +1878,9 @@
       return this;
     };
     For.prototype.compileNode = function(o) {
-      var body, defPart, forPart, guardPart, idt1, index, ivar, lastJumps, lvar, name, namePart, ref, resultPart, returnResult, rvar, scope, source, stepPart, svar, varPart, _ref;
+      var body, defPart, forPart, guardPart, idt1, index, ivar, lastJumps, lvar, name, namePart, ref, resultPart, returnResult, rvar, scope, source, stepPart, svar, varPart, _ref2;
       body = Block.wrap([this.body]);
-      lastJumps = (_ref = last(body.expressions)) != null ? _ref.jumps() : void 0;
+      lastJumps = (_ref2 = last(body.expressions)) != null ? _ref2.jumps() : void 0;
       if (lastJumps && lastJumps instanceof Return) {
         this.returns = false;
       }
@@ -1959,24 +1959,24 @@
       return "" + defPart + (resultPart || '') + this.tab + "for (" + forPart + ") {" + guardPart + varPart + body + this.tab + "}" + (returnResult || '');
     };
     For.prototype.pluckDirectCall = function(o, body) {
-      var base, defs, expr, fn, idx, ref, val, _len, _ref, _ref2, _ref3, _ref4, _ref5, _ref6;
+      var base, defs, expr, fn, idx, ref, val, _len, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7;
       defs = '';
-      _ref = body.expressions;
-      for (idx = 0, _len = _ref.length; idx < _len; idx++) {
-        expr = _ref[idx];
+      _ref2 = body.expressions;
+      for (idx = 0, _len = _ref2.length; idx < _len; idx++) {
+        expr = _ref2[idx];
         expr = expr.unwrapAll();
         if (!(expr instanceof Call)) {
           continue;
         }
         val = expr.variable.unwrapAll();
-        if (!((val instanceof Code) || (val instanceof Value && ((_ref2 = val.base) != null ? _ref2.unwrapAll() : void 0) instanceof Code && val.properties.length === 1 && ((_ref3 = (_ref4 = val.properties[0].name) != null ? _ref4.value : void 0) === 'call' || _ref3 === 'apply')))) {
+        if (!((val instanceof Code) || (val instanceof Value && ((_ref3 = val.base) != null ? _ref3.unwrapAll() : void 0) instanceof Code && val.properties.length === 1 && ((_ref4 = (_ref5 = val.properties[0].name) != null ? _ref5.value : void 0) === 'call' || _ref4 === 'apply')))) {
           continue;
         }
-        fn = ((_ref5 = val.base) != null ? _ref5.unwrapAll() : void 0) || val;
+        fn = ((_ref6 = val.base) != null ? _ref6.unwrapAll() : void 0) || val;
         ref = new Literal(o.scope.freeVariable('fn'));
         base = new Value(ref);
         if (val.base) {
-          _ref6 = [base, val], val.base = _ref6[0], base = _ref6[1];
+          _ref7 = [base, val], val.base = _ref7[0], base = _ref7[1];
           args.unshift(new Literal('this'));
         }
         body.expressions[idx] = new Call(base, expr.args);
@@ -1996,44 +1996,44 @@
     Switch.prototype.children = ['subject', 'cases', 'otherwise'];
     Switch.prototype.isStatement = YES;
     Switch.prototype.jumps = function(o) {
-      var block, conds, _i, _len, _ref, _ref2, _ref3;
+      var block, conds, _i, _len, _ref2, _ref3, _ref4;
       if (o == null) {
         o = {
           block: true
         };
       }
-      _ref = this.cases;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        _ref2 = _ref[_i], conds = _ref2[0], block = _ref2[1];
+      _ref2 = this.cases;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        _ref3 = _ref2[_i], conds = _ref3[0], block = _ref3[1];
         if (block.jumps(o)) {
           return block;
         }
       }
-      return (_ref3 = this.otherwise) != null ? _ref3.jumps(o) : void 0;
+      return (_ref4 = this.otherwise) != null ? _ref4.jumps(o) : void 0;
     };
     Switch.prototype.makeReturn = function() {
-      var pair, _i, _len, _ref, _ref2;
-      _ref = this.cases;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        pair = _ref[_i];
+      var pair, _i, _len, _ref2, _ref3;
+      _ref2 = this.cases;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        pair = _ref2[_i];
         pair[1].makeReturn();
       }
-      if ((_ref2 = this.otherwise) != null) {
-        _ref2.makeReturn();
+      if ((_ref3 = this.otherwise) != null) {
+        _ref3.makeReturn();
       }
       return this;
     };
     Switch.prototype.compileNode = function(o) {
-      var block, body, code, cond, conditions, expr, i, idt1, idt2, _i, _len, _len2, _ref, _ref2, _ref3, _ref4;
+      var block, body, code, cond, conditions, expr, i, idt1, idt2, _i, _len, _len2, _ref2, _ref3, _ref4, _ref5;
       idt1 = o.indent + TAB;
       idt2 = o.indent = idt1 + TAB;
-      code = this.tab + ("switch (" + (((_ref = this.subject) != null ? _ref.compile(o, LEVEL_PAREN) : void 0) || false) + ") {\n");
-      _ref2 = this.cases;
-      for (i = 0, _len = _ref2.length; i < _len; i++) {
-        _ref3 = _ref2[i], conditions = _ref3[0], block = _ref3[1];
-        _ref4 = flatten([conditions]);
-        for (_i = 0, _len2 = _ref4.length; _i < _len2; _i++) {
-          cond = _ref4[_i];
+      code = this.tab + ("switch (" + (((_ref2 = this.subject) != null ? _ref2.compile(o, LEVEL_PAREN) : void 0) || false) + ") {\n");
+      _ref3 = this.cases;
+      for (i = 0, _len = _ref3.length; i < _len; i++) {
+        _ref4 = _ref3[i], conditions = _ref4[0], block = _ref4[1];
+        _ref5 = flatten([conditions]);
+        for (_i = 0, _len2 = _ref5.length; _i < _len2; _i++) {
+          cond = _ref5[_i];
           if (!this.subject) {
             cond = cond.invert();
           }
@@ -2072,12 +2072,12 @@
     }
     If.prototype.children = ['condition', 'body', 'elseBody'];
     If.prototype.bodyNode = function() {
-      var _ref;
-      return (_ref = this.body) != null ? _ref.unwrap() : void 0;
+      var _ref2;
+      return (_ref2 = this.body) != null ? _ref2.unwrap() : void 0;
     };
     If.prototype.elseBodyNode = function() {
-      var _ref;
-      return (_ref = this.elseBody) != null ? _ref.unwrap() : void 0;
+      var _ref2;
+      return (_ref2 = this.elseBody) != null ? _ref2.unwrap() : void 0;
     };
     If.prototype.addElse = function(elseBody) {
       if (this.isChain) {
@@ -2089,12 +2089,12 @@
       return this;
     };
     If.prototype.isStatement = function(o) {
-      var _ref;
-      return (o != null ? o.level : void 0) === LEVEL_TOP || this.bodyNode().isStatement(o) || ((_ref = this.elseBodyNode()) != null ? _ref.isStatement(o) : void 0);
+      var _ref2;
+      return (o != null ? o.level : void 0) === LEVEL_TOP || this.bodyNode().isStatement(o) || ((_ref2 = this.elseBodyNode()) != null ? _ref2.isStatement(o) : void 0);
     };
     If.prototype.jumps = function(o) {
-      var _ref;
-      return this.body.jumps(o) || ((_ref = this.elseBody) != null ? _ref.jumps(o) : void 0);
+      var _ref2;
+      return this.body.jumps(o) || ((_ref2 = this.elseBody) != null ? _ref2.jumps(o) : void 0);
     };
     If.prototype.compileNode = function(o) {
       if (this.isStatement(o)) {
diff --git a/lib/rewriter.js b/lib/rewriter.js
index 31c36e42..f2aa06f2 100644
--- a/lib/rewriter.js
+++ b/lib/rewriter.js
@@ -178,7 +178,7 @@
         }
         tokens.splice(i, 0, ['CALL_START', '(', token[2]]);
         this.detectEnd(i + 1, function(token, i) {
-          var post, _ref;
+          var post, _ref4;
           tag = token[0];
           if (!seenSingle && token.fromThen) {
             return true;
@@ -189,7 +189,7 @@
           if ((tag === '.' || tag === '?.' || tag === '::') && this.tag(i - 1) === 'OUTDENT') {
             return true;
           }
-          return !token.generated && this.tag(i - 1) !== ',' && __indexOf.call(IMPLICIT_END, tag) >= 0 && (tag !== 'INDENT' || (this.tag(i - 2) !== 'CLASS' && (_ref = this.tag(i - 1), __indexOf.call(IMPLICIT_BLOCK, _ref) < 0) && !((post = this.tokens[i + 1]) && post.generated && post[0] === '{')));
+          return !token.generated && this.tag(i - 1) !== ',' && __indexOf.call(IMPLICIT_END, tag) >= 0 && (tag !== 'INDENT' || (this.tag(i - 2) !== 'CLASS' && (_ref4 = this.tag(i - 1), __indexOf.call(IMPLICIT_BLOCK, _ref4) < 0) && !((post = this.tokens[i + 1]) && post.generated && post[0] === '{')));
         }, action);
         if (prev[0] === '?') {
           prev[0] = 'FUNC_EXIST';
@@ -222,8 +222,8 @@
           indent.generated = outdent.generated = true;
           tokens.splice(i + 1, 0, indent);
           condition = function(token, i) {
-            var _ref;
-            return token[1] !== ';' && (_ref = token[0], __indexOf.call(SINGLE_CLOSERS, _ref) >= 0) && !(token[0] === 'ELSE' && (starter !== 'IF' && starter !== 'THEN'));
+            var _ref3;
+            return token[1] !== ';' && (_ref3 = token[0], __indexOf.call(SINGLE_CLOSERS, _ref3) >= 0) && !(token[0] === 'ELSE' && (starter !== 'IF' && starter !== 'THEN'));
           };
           action = function(token, i) {
             return this.tokens.splice((this.tag(i - 1) === ',' ? i - 1 : i), 0, outdent);
diff --git a/lib/scope.js b/lib/scope.js
index 69bc6c59..ab88ba9f 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -46,12 +46,12 @@
       return this.add(name, 'param');
     };
     Scope.prototype.check = function(name, immediate) {
-      var found, _ref;
+      var found, _ref2;
       found = !!this.type(name);
       if (found || immediate) {
         return found;
       }
-      return !!((_ref = this.parent) != null ? _ref.check(name) : void 0);
+      return !!((_ref2 = this.parent) != null ? _ref2.check(name) : void 0);
     };
     Scope.prototype.temporary = function(name, index) {
       if (name.length > 1) {
@@ -61,10 +61,10 @@
       }
     };
     Scope.prototype.type = function(name) {
-      var v, _i, _len, _ref;
-      _ref = this.variables;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        v = _ref[_i];
+      var v, _i, _len, _ref2;
+      _ref2 = this.variables;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        v = _ref2[_i];
         if (v.name === name) {
           return v.type;
         }
@@ -74,7 +74,7 @@
     Scope.prototype.freeVariable = function(type) {
       var index, temp;
       index = 0;
-      while (this.check((temp = this.temporary(type, index)), true)) {
+      while (this.check((temp = this.temporary(type, index)))) {
         index++;
       }
       this.add(temp, 'var', true);
@@ -91,12 +91,12 @@
       return !!this.declaredVariables().length;
     };
     Scope.prototype.declaredVariables = function() {
-      var realVars, tempVars, v, _i, _len, _ref;
+      var realVars, tempVars, v, _i, _len, _ref2;
       realVars = [];
       tempVars = [];
-      _ref = this.variables;
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        v = _ref[_i];
+      _ref2 = this.variables;
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        v = _ref2[_i];
         if (v.type === 'var') {
           (v.name.charAt(0) === '_' ? tempVars : realVars).push(v.name);
         }
@@ -104,11 +104,11 @@
       return realVars.sort().concat(tempVars.sort());
     };
     Scope.prototype.assignedVariables = function() {
-      var v, _i, _len, _ref, _results;
-      _ref = this.variables;
+      var v, _i, _len, _ref2, _results;
+      _ref2 = this.variables;
       _results = [];
-      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-        v = _ref[_i];
+      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+        v = _ref2[_i];
         if (v.type.assigned) {
           _results.push("" + v.name + " = " + v.type.value);
         }
diff --git a/src/scope.coffee b/src/scope.coffee
index 620fbcb4..76ceb775 100644
--- a/src/scope.coffee
+++ b/src/scope.coffee
@@ -66,7 +66,7 @@ exports.Scope = class Scope
   # compiler-generated variable. `_var`, `_var2`, and so on...
   freeVariable: (type) ->
     index = 0
-    index++ while @check((temp = @temporary type, index), true)
+    index++ while @check((temp = @temporary type, index))
     @add temp, 'var', yes
     temp