Break JavascriptCompiler into standalone file

4 files changed, 862 insertions, 846 deletions

diff --git a/Rakefile b/Rakefile
index 404c681..30187d7 100644
--- a/Rakefile
+++ b/Rakefile
@@ -39,7 +39,7 @@ def remove_exports(string)
   match ? match[1] : string
 end
 
-minimal_deps = %w(browser-prefix base compiler/parser compiler/base compiler/ast utils compiler/compiler runtime browser-suffix).map do |file|
+minimal_deps = %w(browser-prefix base compiler/parser compiler/base compiler/ast utils compiler/compiler compiler/javascript-compiler runtime browser-suffix).map do |file|
   "lib/handlebars/#{file}.js"
 end
 
diff --git a/lib/handlebars/compiler/compiler.js b/lib/handlebars/compiler/compiler.js
index 8bb1fc5..98e12b1 100644
--- a/lib/handlebars/compiler/compiler.js
+++ b/lib/handlebars/compiler/compiler.js
@@ -8,7 +8,6 @@ compilerbase.attach(Handlebars);
 
 /*jshint eqnull:true*/
 var Compiler = Handlebars.Compiler = function() {};
-var JavaScriptCompiler = Handlebars.JavaScriptCompiler = function() {};
 
 // the foundHelper register will disambiguate helper lookup from finding a
 // function in a context. This is necessary for mustache compatibility, which
@@ -416,845 +415,6 @@ Compiler.prototype = {
   }
 };
 
-var Literal = function(value) {
-  this.value = value;
-};
-
-JavaScriptCompiler.prototype = {
-  // PUBLIC API: You can override these methods in a subclass to provide
-  // alternative compiled forms for name lookup and buffering semantics
-  nameLookup: function(parent, name /* , type*/) {
-    if (/^[0-9]+$/.test(name)) {
-      return parent + "[" + name + "]";
-    } else if (JavaScriptCompiler.isValidJavaScriptVariableName(name)) {
-      return parent + "." + name;
-    }
-    else {
-      return parent + "['" + name + "']";
-    }
-  },
-
-  appendToBuffer: function(string) {
-    if (this.environment.isSimple) {
-      return "return " + string + ";";
-    } else {
-      return {
-        appendToBuffer: true,
-        content: string,
-        toString: function() { return "buffer += " + string + ";"; }
-      };
-    }
-  },
-
-  initializeBuffer: function() {
-    return this.quotedString("");
-  },
-
-  namespace: "Handlebars",
-  // END PUBLIC API
-
-  compile: function(environment, options, context, asObject) {
-    this.environment = environment;
-    this.options = options || {};
-
-    Handlebars.log(Handlebars.logger.DEBUG, this.environment.disassemble() + "\n\n");
-
-    this.name = this.environment.name;
-    this.isChild = !!context;
-    this.context = context || {
-      programs: [],
-      environments: [],
-      aliases: { }
-    };
-
-    this.preamble();
-
-    this.stackSlot = 0;
-    this.stackVars = [];
-    this.registers = { list: [] };
-    this.compileStack = [];
-    this.inlineStack = [];
-
-    this.compileChildren(environment, options);
-
-    var opcodes = environment.opcodes, opcode;
-
-    this.i = 0;
-
-    for(l=opcodes.length; this.i<l; this.i++) {
-      opcode = opcodes[this.i];
-
-      if(opcode.opcode === 'DECLARE') {
-        this[opcode.name] = opcode.value;
-      } else {
-        this[opcode.opcode].apply(this, opcode.args);
-      }
-    }
-
-    return this.createFunctionContext(asObject);
-  },
-
-  nextOpcode: function() {
-    var opcodes = this.environment.opcodes;
-    return opcodes[this.i + 1];
-  },
-
-  eat: function() {
-    this.i = this.i + 1;
-  },
-
-  preamble: function() {
-    var out = [];
-
-    if (!this.isChild) {
-      var namespace = this.namespace;
-
-      var copies = "helpers = this.merge(helpers, " + namespace + ".helpers);";
-      if (this.environment.usePartial) { copies = copies + " partials = this.merge(partials, " + namespace + ".partials);"; }
-      if (this.options.data) { copies = copies + " data = data || {};"; }
-      out.push(copies);
-    } else {
-      out.push('');
-    }
-
-    if (!this.environment.isSimple) {
-      out.push(", buffer = " + this.initializeBuffer());
-    } else {
-      out.push("");
-    }
-
-    // track the last context pushed into place to allow skipping the
-    // getContext opcode when it would be a noop
-    this.lastContext = 0;
-    this.source = out;
-  },
-
-  createFunctionContext: function(asObject) {
-    var locals = this.stackVars.concat(this.registers.list);
-
-    if(locals.length > 0) {
-      this.source[1] = this.source[1] + ", " + locals.join(", ");
-    }
-
-    // Generate minimizer alias mappings
-    if (!this.isChild) {
-      for (var alias in this.context.aliases) {
-        if (this.context.aliases.hasOwnProperty(alias)) {
-          this.source[1] = this.source[1] + ', ' + alias + '=' + this.context.aliases[alias];
-        }
-      }
-    }
-
-    if (this.source[1]) {
-      this.source[1] = "var " + this.source[1].substring(2) + ";";
-    }
-
-    // Merge children
-    if (!this.isChild) {
-      this.source[1] += '\n' + this.context.programs.join('\n') + '\n';
-    }
-
-    if (!this.environment.isSimple) {
-      this.source.push("return buffer;");
-    }
-
-    var params = this.isChild ? ["depth0", "data"] : ["Handlebars", "depth0", "helpers", "partials", "data"];
-
-    for(var i=0, l=this.environment.depths.list.length; i<l; i++) {
-      params.push("depth" + this.environment.depths.list[i]);
-    }
-
-    // Perform a second pass over the output to merge content when possible
-    var source = this.mergeSource();
-
-    if (!this.isChild) {
-      var revision = Handlebars.COMPILER_REVISION,
-          versions = Handlebars.REVISION_CHANGES[revision];
-      source = "this.compilerInfo = ["+revision+",'"+versions+"'];\n"+source;
-    }
-
-    if (asObject) {
-      params.push(source);
-
-      return Function.apply(this, params);
-    } else {
-      var functionSource = 'function ' + (this.name || '') + '(' + params.join(',') + ') {\n  ' + source + '}';
-      Handlebars.log(Handlebars.logger.DEBUG, functionSource + "\n\n");
-      return functionSource;
-    }
-  },
-  mergeSource: function() {
-    // WARN: We are not handling the case where buffer is still populated as the source should
-    // not have buffer append operations as their final action.
-    var source = '',
-        buffer;
-    for (var i = 0, len = this.source.length; i < len; i++) {
-      var line = this.source[i];
-      if (line.appendToBuffer) {
-        if (buffer) {
-          buffer = buffer + '\n    + ' + line.content;
-        } else {
-          buffer = line.content;
-        }
-      } else {
-        if (buffer) {
-          source += 'buffer += ' + buffer + ';\n  ';
-          buffer = undefined;
-        }
-        source += line + '\n  ';
-      }
-    }
-    return source;
-  },
-
-  // [blockValue]
-  //
-  // On stack, before: hash, inverse, program, value
-  // On stack, after: return value of blockHelperMissing
-  //
-  // The purpose of this opcode is to take a block of the form
-  // `{{#foo}}...{{/foo}}`, resolve the value of `foo`, and
-  // replace it on the stack with the result of properly
-  // invoking blockHelperMissing.
-  blockValue: function() {
-    this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';
-
-    var params = ["depth0"];
-    this.setupParams(0, params);
-
-    this.replaceStack(function(current) {
-      params.splice(1, 0, current);
-      return "blockHelperMissing.call(" + params.join(", ") + ")";
-    });
-  },
-
-  // [ambiguousBlockValue]
-  //
-  // On stack, before: hash, inverse, program, value
-  // Compiler value, before: lastHelper=value of last found helper, if any
-  // On stack, after, if no lastHelper: same as [blockValue]
-  // On stack, after, if lastHelper: value
-  ambiguousBlockValue: function() {
-    this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';
-
-    var params = ["depth0"];
-    this.setupParams(0, params);
-
-    var current = this.topStack();
-    params.splice(1, 0, current);
-
-    // Use the options value generated from the invocation
-    params[params.length-1] = 'options';
-
-    this.source.push("if (!" + this.lastHelper + ") { " + current + " = blockHelperMissing.call(" + params.join(", ") + "); }");
-  },
-
-  // [appendContent]
-  //
-  // On stack, before: ...
-  // On stack, after: ...
-  //
-  // Appends the string value of `content` to the current buffer
-  appendContent: function(content) {
-    this.source.push(this.appendToBuffer(this.quotedString(content)));
-  },
-
-  // [append]
-  //
-  // On stack, before: value, ...
-  // On stack, after: ...
-  //
-  // Coerces `value` to a String and appends it to the current buffer.
-  //
-  // If `value` is truthy, or 0, it is coerced into a string and appended
-  // Otherwise, the empty string is appended
-  append: function() {
-    // Force anything that is inlined onto the stack so we don't have duplication
-    // when we examine local
-    this.flushInline();
-    var local = this.popStack();
-    this.source.push("if(" + local + " || " + local + " === 0) { " + this.appendToBuffer(local) + " }");
-    if (this.environment.isSimple) {
-      this.source.push("else { " + this.appendToBuffer("''") + " }");
-    }
-  },
-
-  // [appendEscaped]
-  //
-  // On stack, before: value, ...
-  // On stack, after: ...
-  //
-  // Escape `value` and append it to the buffer
-  appendEscaped: function() {
-    this.context.aliases.escapeExpression = 'this.escapeExpression';
-
-    this.source.push(this.appendToBuffer("escapeExpression(" + this.popStack() + ")"));
-  },
-
-  // [getContext]
-  //
-  // On stack, before: ...
-  // On stack, after: ...
-  // Compiler value, after: lastContext=depth
-  //
-  // Set the value of the `lastContext` compiler value to the depth
-  getContext: function(depth) {
-    if(this.lastContext !== depth) {
-      this.lastContext = depth;
-    }
-  },
-
-  // [lookupOnContext]
-  //
-  // On stack, before: ...
-  // On stack, after: currentContext[name], ...
-  //
-  // Looks up the value of `name` on the current context and pushes
-  // it onto the stack.
-  lookupOnContext: function(name) {
-    this.push(this.nameLookup('depth' + this.lastContext, name, 'context'));
-  },
-
-  // [pushContext]
-  //
-  // On stack, before: ...
-  // On stack, after: currentContext, ...
-  //
-  // Pushes the value of the current context onto the stack.
-  pushContext: function() {
-    this.pushStackLiteral('depth' + this.lastContext);
-  },
-
-  // [resolvePossibleLambda]
-  //
-  // On stack, before: value, ...
-  // On stack, after: resolved value, ...
-  //
-  // If the `value` is a lambda, replace it on the stack by
-  // the return value of the lambda
-  resolvePossibleLambda: function() {
-    this.context.aliases.functionType = '"function"';
-
-    this.replaceStack(function(current) {
-      return "typeof " + current + " === functionType ? " + current + ".apply(depth0) : " + current;
-    });
-  },
-
-  // [lookup]
-  //
-  // On stack, before: value, ...
-  // On stack, after: value[name], ...
-  //
-  // Replace the value on the stack with the result of looking
-  // up `name` on `value`
-  lookup: function(name) {
-    this.replaceStack(function(current) {
-      return current + " == null || " + current + " === false ? " + current + " : " + this.nameLookup(current, name, 'context');
-    });
-  },
-
-  // [lookupData]
-  //
-  // On stack, before: ...
-  // On stack, after: data[id], ...
-  //
-  // Push the result of looking up `id` on the current data
-  lookupData: function(id) {
-    this.push('data');
-  },
-
-  // [pushStringParam]
-  //
-  // On stack, before: ...
-  // On stack, after: string, currentContext, ...
-  //
-  // This opcode is designed for use in string mode, which
-  // provides the string value of a parameter along with its
-  // depth rather than resolving it immediately.
-  pushStringParam: function(string, type) {
-    this.pushStackLiteral('depth' + this.lastContext);
-
-    this.pushString(type);
-
-    if (typeof string === 'string') {
-      this.pushString(string);
-    } else {
-      this.pushStackLiteral(string);
-    }
-  },
-
-  emptyHash: function() {
-    this.pushStackLiteral('{}');
-
-    if (this.options.stringParams) {
-      this.register('hashTypes', '{}');
-      this.register('hashContexts', '{}');
-    }
-  },
-  pushHash: function() {
-    this.hash = {values: [], types: [], contexts: []};
-  },
-  popHash: function() {
-    var hash = this.hash;
-    this.hash = undefined;
-
-    if (this.options.stringParams) {
-      this.register('hashContexts', '{' + hash.contexts.join(',') + '}');
-      this.register('hashTypes', '{' + hash.types.join(',') + '}');
-    }
-    this.push('{\n    ' + hash.values.join(',\n    ') + '\n  }');
-  },
-
-  // [pushString]
-  //
-  // On stack, before: ...
-  // On stack, after: quotedString(string), ...
-  //
-  // Push a quoted version of `string` onto the stack
-  pushString: function(string) {
-    this.pushStackLiteral(this.quotedString(string));
-  },
-
-  // [push]
-  //
-  // On stack, before: ...
-  // On stack, after: expr, ...
-  //
-  // Push an expression onto the stack
-  push: function(expr) {
-    this.inlineStack.push(expr);
-    return expr;
-  },
-
-  // [pushLiteral]
-  //
-  // On stack, before: ...
-  // On stack, after: value, ...
-  //
-  // Pushes a value onto the stack. This operation prevents
-  // the compiler from creating a temporary variable to hold
-  // it.
-  pushLiteral: function(value) {
-    this.pushStackLiteral(value);
-  },
-
-  // [pushProgram]
-  //
-  // On stack, before: ...
-  // On stack, after: program(guid), ...
-  //
-  // Push a program expression onto the stack. This takes
-  // a compile-time guid and converts it into a runtime-accessible
-  // expression.
-  pushProgram: function(guid) {
-    if (guid != null) {
-      this.pushStackLiteral(this.programExpression(guid));
-    } else {
-      this.pushStackLiteral(null);
-    }
-  },
-
-  // [invokeHelper]
-  //
-  // On stack, before: hash, inverse, program, params..., ...
-  // On stack, after: result of helper invocation
-  //
-  // Pops off the helper's parameters, invokes the helper,
-  // and pushes the helper's return value onto the stack.
-  //
-  // If the helper is not found, `helperMissing` is called.
-  invokeHelper: function(paramSize, name) {
-    this.context.aliases.helperMissing = 'helpers.helperMissing';
-
-    var helper = this.lastHelper = this.setupHelper(paramSize, name, true);
-    var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
-
-    this.push(helper.name + ' || ' + nonHelper);
-    this.replaceStack(function(name) {
-      return name + ' ? ' + name + '.call(' +
-          helper.callParams + ") " + ": helperMissing.call(" +
-          helper.helperMissingParams + ")";
-    });
-  },
-
-  // [invokeKnownHelper]
-  //
-  // On stack, before: hash, inverse, program, params..., ...
-  // On stack, after: result of helper invocation
-  //
-  // This operation is used when the helper is known to exist,
-  // so a `helperMissing` fallback is not required.
-  invokeKnownHelper: function(paramSize, name) {
-    var helper = this.setupHelper(paramSize, name);
-    this.push(helper.name + ".call(" + helper.callParams + ")");
-  },
-
-  // [invokeAmbiguous]
-  //
-  // On stack, before: hash, inverse, program, params..., ...
-  // On stack, after: result of disambiguation
-  //
-  // This operation is used when an expression like `{{foo}}`
-  // is provided, but we don't know at compile-time whether it
-  // is a helper or a path.
-  //
-  // This operation emits more code than the other options,
-  // and can be avoided by passing the `knownHelpers` and
-  // `knownHelpersOnly` flags at compile-time.
-  invokeAmbiguous: function(name, helperCall) {
-    this.context.aliases.functionType = '"function"';
-
-    this.pushStackLiteral('{}');    // Hash value
-    var helper = this.setupHelper(0, name, helperCall);
-
-    var helperName = this.lastHelper = this.nameLookup('helpers', name, 'helper');
-
-    var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
-    var nextStack = this.nextStack();
-
-    this.source.push('if (' + nextStack + ' = ' + helperName + ') { ' + nextStack + ' = ' + nextStack + '.call(' + helper.callParams + '); }');
-    this.source.push('else { ' + nextStack + ' = ' + nonHelper + '; ' + nextStack + ' = typeof ' + nextStack + ' === functionType ? ' + nextStack + '.apply(depth0) : ' + nextStack + '; }');
-  },
-
-  // [invokePartial]
-  //
-  // On stack, before: context, ...
-  // On stack after: result of partial invocation
-  //
-  // This operation pops off a context, invokes a partial with that context,
-  // and pushes the result of the invocation back.
-  invokePartial: function(name) {
-    var params = [this.nameLookup('partials', name, 'partial'), "'" + name + "'", this.popStack(), "helpers", "partials"];
-
-    if (this.options.data) {
-      params.push("data");
-    }
-
-    this.context.aliases.self = "this";
-    this.push("self.invokePartial(" + params.join(", ") + ")");
-  },
-
-  // [assignToHash]
-  //
-  // On stack, before: value, hash, ...
-  // On stack, after: hash, ...
-  //
-  // Pops a value and hash off the stack, assigns `hash[key] = value`
-  // and pushes the hash back onto the stack.
-  assignToHash: function(key) {
-    var value = this.popStack(),
-        context,
-        type;
-
-    if (this.options.stringParams) {
-      type = this.popStack();
-      context = this.popStack();
-    }
-
-    var hash = this.hash;
-    if (context) {
-      hash.contexts.push("'" + key + "': " + context);
-    }
-    if (type) {
-      hash.types.push("'" + key + "': " + type);
-    }
-    hash.values.push("'" + key + "': (" + value + ")");
-  },
-
-  // HELPERS
-
-  compiler: JavaScriptCompiler,
-
-  compileChildren: function(environment, options) {
-    var children = environment.children, child, compiler;
-
-    for(var i=0, l=children.length; i<l; i++) {
-      child = children[i];
-      compiler = new this.compiler();
-
-      var index = this.matchExistingProgram(child);
-
-      if (index == null) {
-        this.context.programs.push('');     // Placeholder to prevent name conflicts for nested children
-        index = this.context.programs.length;
-        child.index = index;
-        child.name = 'program' + index;
-        this.context.programs[index] = compiler.compile(child, options, this.context);
-        this.context.environments[index] = child;
-      } else {
-        child.index = index;
-        child.name = 'program' + index;
-      }
-    }
-  },
-  matchExistingProgram: function(child) {
-    for (var i = 0, len = this.context.environments.length; i < len; i++) {
-      var environment = this.context.environments[i];
-      if (environment && environment.equals(child)) {
-        return i;
-      }
-    }
-  },
-
-  programExpression: function(guid) {
-    this.context.aliases.self = "this";
-
-    if(guid == null) {
-      return "self.noop";
-    }
-
-    var child = this.environment.children[guid],
-        depths = child.depths.list, depth;
-
-    var programParams = [child.index, child.name, "data"];
-
-    for(var i=0, l = depths.length; i<l; i++) {
-      depth = depths[i];
-
-      if(depth === 1) { programParams.push("depth0"); }
-      else { programParams.push("depth" + (depth - 1)); }
-    }
-
-    return (depths.length === 0 ? "self.program(" : "self.programWithDepth(") + programParams.join(", ") + ")";
-  },
-
-  register: function(name, val) {
-    this.useRegister(name);
-    this.source.push(name + " = " + val + ";");
-  },
-
-  useRegister: function(name) {
-    if(!this.registers[name]) {
-      this.registers[name] = true;
-      this.registers.list.push(name);
-    }
-  },
-
-  pushStackLiteral: function(item) {
-    return this.push(new Literal(item));
-  },
-
-  pushStack: function(item) {
-    this.flushInline();
-
-    var stack = this.incrStack();
-    if (item) {
-      this.source.push(stack + " = " + item + ";");
-    }
-    this.compileStack.push(stack);
-    return stack;
-  },
-
-  replaceStack: function(callback) {
-    var prefix = '',
-        inline = this.isInline(),
-        stack;
-
-    // If we are currently inline then we want to merge the inline statement into the
-    // replacement statement via ','
-    if (inline) {
-      var top = this.popStack(true);
-
-      if (top instanceof Literal) {
-        // Literals do not need to be inlined
-        stack = top.value;
-      } else {
-        // Get or create the current stack name for use by the inline
-        var name = this.stackSlot ? this.topStackName() : this.incrStack();
-
-        prefix = '(' + this.push(name) + ' = ' + top + '),';
-        stack = this.topStack();
-      }
-    } else {
-      stack = this.topStack();
-    }
-
-    var item = callback.call(this, stack);
-
-    if (inline) {
-      if (this.inlineStack.length || this.compileStack.length) {
-        this.popStack();
-      }
-      this.push('(' + prefix + item + ')');
-    } else {
-      // Prevent modification of the context depth variable. Through replaceStack
-      if (!/^stack/.test(stack)) {
-        stack = this.nextStack();
-      }
-
-      this.source.push(stack + " = (" + prefix + item + ");");
-    }
-    return stack;
-  },
-
-  nextStack: function() {
-    return this.pushStack();
-  },
-
-  incrStack: function() {
-    this.stackSlot++;
-    if(this.stackSlot > this.stackVars.length) { this.stackVars.push("stack" + this.stackSlot); }
-    return this.topStackName();
-  },
-  topStackName: function() {
-    return "stack" + this.stackSlot;
-  },
-  flushInline: function() {
-    var inlineStack = this.inlineStack;
-    if (inlineStack.length) {
-      this.inlineStack = [];
-      for (var i = 0, len = inlineStack.length; i < len; i++) {
-        var entry = inlineStack[i];
-        if (entry instanceof Literal) {
-          this.compileStack.push(entry);
-        } else {
-          this.pushStack(entry);
-        }
-      }
-    }
-  },
-  isInline: function() {
-    return this.inlineStack.length;
-  },
-
-  popStack: function(wrapped) {
-    var inline = this.isInline(),
-        item = (inline ? this.inlineStack : this.compileStack).pop();
-
-    if (!wrapped && (item instanceof Literal)) {
-      return item.value;
-    } else {
-      if (!inline) {
-        this.stackSlot--;
-      }
-      return item;
-    }
-  },
-
-  topStack: function(wrapped) {
-    var stack = (this.isInline() ? this.inlineStack : this.compileStack),
-        item = stack[stack.length - 1];
-
-    if (!wrapped && (item instanceof Literal)) {
-      return item.value;
-    } else {
-      return item;
-    }
-  },
-
-  quotedString: function(str) {
-    return '"' + str
-      .replace(/\\/g, '\\\\')
-      .replace(/"/g, '\\"')
-      .replace(/\n/g, '\\n')
-      .replace(/\r/g, '\\r')
-      .replace(/\u2028/g, '\\u2028')   // Per Ecma-262 7.3 + 7.8.4
-      .replace(/\u2029/g, '\\u2029') + '"';
-  },
-
-  setupHelper: function(paramSize, name, missingParams) {
-    var params = [];
-    this.setupParams(paramSize, params, missingParams);
-    var foundHelper = this.nameLookup('helpers', name, 'helper');
-
-    return {
-      params: params,
-      name: foundHelper,
-      callParams: ["depth0"].concat(params).join(", "),
-      helperMissingParams: missingParams && ["depth0", this.quotedString(name)].concat(params).join(", ")
-    };
-  },
-
-  // the params and contexts arguments are passed in arrays
-  // to fill in
-  setupParams: function(paramSize, params, useRegister) {
-    var options = [], contexts = [], types = [], param, inverse, program;
-
-    options.push("hash:" + this.popStack());
-
-    inverse = this.popStack();
-    program = this.popStack();
-
-    // Avoid setting fn and inverse if neither are set. This allows
-    // helpers to do a check for `if (options.fn)`
-    if (program || inverse) {
-      if (!program) {
-        this.context.aliases.self = "this";
-        program = "self.noop";
-      }
-
-      if (!inverse) {
-       this.context.aliases.self = "this";
-        inverse = "self.noop";
-      }
-
-      options.push("inverse:" + inverse);
-      options.push("fn:" + program);
-    }
-
-    for(var i=0; i<paramSize; i++) {
-      param = this.popStack();
-      params.push(param);
-
-      if(this.options.stringParams) {
-        types.push(this.popStack());
-        contexts.push(this.popStack());
-      }
-    }
-
-    if (this.options.stringParams) {
-      options.push("contexts:[" + contexts.join(",") + "]");
-      options.push("types:[" + types.join(",") + "]");
-      options.push("hashContexts:hashContexts");
-      options.push("hashTypes:hashTypes");
-    }
-
-    if(this.options.data) {
-      options.push("data:data");
-    }
-
-    options = "{" + options.join(",") + "}";
-    if (useRegister) {
-      this.register('options', options);
-      params.push('options');
-    } else {
-      params.push(options);
-    }
-    return params.join(", ");
-  }
-};
-
-var reservedWords = (
-  "break else new var" +
-  " case finally return void" +
-  " catch for switch while" +
-  " continue function this with" +
-  " default if throw" +
-  " delete in try" +
-  " do instanceof typeof" +
-  " abstract enum int short" +
-  " boolean export interface static" +
-  " byte extends long super" +
-  " char final native synchronized" +
-  " class float package throws" +
-  " const goto private transient" +
-  " debugger implements protected volatile" +
-  " double import public let yield"
-).split(" ");
-
-var compilerWords = JavaScriptCompiler.RESERVED_WORDS = {};
-
-for(var i=0, l=reservedWords.length; i<l; i++) {
-  compilerWords[reservedWords[i]] = true;
-}
-
-JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
-  if(!JavaScriptCompiler.RESERVED_WORDS[name] && /^[a-zA-Z_$][0-9a-zA-Z_$]+$/.test(name)) {
-    return true;
-  }
-  return false;
-};
-
 Handlebars.precompile = function(input, options) {
   if (input == null || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
     throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.precompile. You passed " + input);
@@ -1266,7 +426,7 @@ Handlebars.precompile = function(input, options) {
   }
   var ast = Handlebars.parse(input);
   var environment = new Compiler().compile(ast, options);
-  return new JavaScriptCompiler().compile(environment, options);
+  return new Handlebars.JavaScriptCompiler().compile(environment, options);
 };
 
 Handlebars.compile = function(input, options) {
@@ -1282,7 +442,7 @@ Handlebars.compile = function(input, options) {
   function compile() {
     var ast = Handlebars.parse(input);
     var environment = new Compiler().compile(ast, options);
-    var templateSpec = new JavaScriptCompiler().compile(environment, options, undefined, true);
+    var templateSpec = new Handlebars.JavaScriptCompiler().compile(environment, options, undefined, true);
     return Handlebars.template(templateSpec);
   }
 
@@ -1301,5 +461,3 @@ Handlebars.compile = function(input, options) {
 return Handlebars;
 
 };
-
-
diff --git a/lib/handlebars/compiler/index.js b/lib/handlebars/compiler/index.js
index 6ed8d21..0cc5c01 100644
--- a/lib/handlebars/compiler/index.js
+++ b/lib/handlebars/compiler/index.js
@@ -4,12 +4,14 @@ module.exports.attach = function(Handlebars) {
 var visitor = require("./visitor"),
     printer = require("./printer"),
     ast = require("./ast"),
-    compiler = require("./compiler");
+    compiler = require("./compiler"),
+    javascriptCompiler = require("./javascript-compiler");
 
 visitor.attach(Handlebars);
 printer.attach(Handlebars);
 ast.attach(Handlebars);
 compiler.attach(Handlebars);
+javascriptCompiler.attach(Handlebars);
 
 return Handlebars;
 
diff --git a/lib/handlebars/compiler/javascript-compiler.js b/lib/handlebars/compiler/javascript-compiler.js
new file mode 100644
index 0000000..4548c6a
--- /dev/null
+++ b/lib/handlebars/compiler/javascript-compiler.js
@@ -0,0 +1,856 @@
+var compilerbase = require("./base");
+
+exports.attach = function(Handlebars) {
+
+compilerbase.attach(Handlebars);
+
+// BEGIN(BROWSER)
+/*jshint eqnull:true*/
+
+var Literal = function(value) {
+  this.value = value;
+};
+
+
+var JavaScriptCompiler = Handlebars.JavaScriptCompiler = function() {};
+
+JavaScriptCompiler.prototype = {
+  // PUBLIC API: You can override these methods in a subclass to provide
+  // alternative compiled forms for name lookup and buffering semantics
+  nameLookup: function(parent, name /* , type*/) {
+    if (/^[0-9]+$/.test(name)) {
+      return parent + "[" + name + "]";
+    } else if (JavaScriptCompiler.isValidJavaScriptVariableName(name)) {
+      return parent + "." + name;
+    }
+    else {
+      return parent + "['" + name + "']";
+    }
+  },
+
+  appendToBuffer: function(string) {
+    if (this.environment.isSimple) {
+      return "return " + string + ";";
+    } else {
+      return {
+        appendToBuffer: true,
+        content: string,
+        toString: function() { return "buffer += " + string + ";"; }
+      };
+    }
+  },
+
+  initializeBuffer: function() {
+    return this.quotedString("");
+  },
+
+  namespace: "Handlebars",
+  // END PUBLIC API
+
+  compile: function(environment, options, context, asObject) {
+    this.environment = environment;
+    this.options = options || {};
+
+    Handlebars.log(Handlebars.logger.DEBUG, this.environment.disassemble() + "\n\n");
+
+    this.name = this.environment.name;
+    this.isChild = !!context;
+    this.context = context || {
+      programs: [],
+      environments: [],
+      aliases: { }
+    };
+
+    this.preamble();
+
+    this.stackSlot = 0;
+    this.stackVars = [];
+    this.registers = { list: [] };
+    this.compileStack = [];
+    this.inlineStack = [];
+
+    this.compileChildren(environment, options);
+
+    var opcodes = environment.opcodes, opcode;
+
+    this.i = 0;
+
+    for(var l=opcodes.length; this.i<l; this.i++) {
+      opcode = opcodes[this.i];
+
+      if(opcode.opcode === 'DECLARE') {
+        this[opcode.name] = opcode.value;
+      } else {
+        this[opcode.opcode].apply(this, opcode.args);
+      }
+    }
+
+    return this.createFunctionContext(asObject);
+  },
+
+  nextOpcode: function() {
+    var opcodes = this.environment.opcodes;
+    return opcodes[this.i + 1];
+  },
+
+  eat: function() {
+    this.i = this.i + 1;
+  },
+
+  preamble: function() {
+    var out = [];
+
+    if (!this.isChild) {
+      var namespace = this.namespace;
+
+      var copies = "helpers = this.merge(helpers, " + namespace + ".helpers);";
+      if (this.environment.usePartial) { copies = copies + " partials = this.merge(partials, " + namespace + ".partials);"; }
+      if (this.options.data) { copies = copies + " data = data || {};"; }
+      out.push(copies);
+    } else {
+      out.push('');
+    }
+
+    if (!this.environment.isSimple) {
+      out.push(", buffer = " + this.initializeBuffer());
+    } else {
+      out.push("");
+    }
+
+    // track the last context pushed into place to allow skipping the
+    // getContext opcode when it would be a noop
+    this.lastContext = 0;
+    this.source = out;
+  },
+
+  createFunctionContext: function(asObject) {
+    var locals = this.stackVars.concat(this.registers.list);
+
+    if(locals.length > 0) {
+      this.source[1] = this.source[1] + ", " + locals.join(", ");
+    }
+
+    // Generate minimizer alias mappings
+    if (!this.isChild) {
+      for (var alias in this.context.aliases) {
+        if (this.context.aliases.hasOwnProperty(alias)) {
+          this.source[1] = this.source[1] + ', ' + alias + '=' + this.context.aliases[alias];
+        }
+      }
+    }
+
+    if (this.source[1]) {
+      this.source[1] = "var " + this.source[1].substring(2) + ";";
+    }
+
+    // Merge children
+    if (!this.isChild) {
+      this.source[1] += '\n' + this.context.programs.join('\n') + '\n';
+    }
+
+    if (!this.environment.isSimple) {
+      this.source.push("return buffer;");
+    }
+
+    var params = this.isChild ? ["depth0", "data"] : ["Handlebars", "depth0", "helpers", "partials", "data"];
+
+    for(var i=0, l=this.environment.depths.list.length; i<l; i++) {
+      params.push("depth" + this.environment.depths.list[i]);
+    }
+
+    // Perform a second pass over the output to merge content when possible
+    var source = this.mergeSource();
+
+    if (!this.isChild) {
+      var revision = Handlebars.COMPILER_REVISION,
+          versions = Handlebars.REVISION_CHANGES[revision];
+      source = "this.compilerInfo = ["+revision+",'"+versions+"'];\n"+source;
+    }
+
+    if (asObject) {
+      params.push(source);
+
+      return Function.apply(this, params);
+    } else {
+      var functionSource = 'function ' + (this.name || '') + '(' + params.join(',') + ') {\n  ' + source + '}';
+      Handlebars.log(Handlebars.logger.DEBUG, functionSource + "\n\n");
+      return functionSource;
+    }
+  },
+  mergeSource: function() {
+    // WARN: We are not handling the case where buffer is still populated as the source should
+    // not have buffer append operations as their final action.
+    var source = '',
+        buffer;
+    for (var i = 0, len = this.source.length; i < len; i++) {
+      var line = this.source[i];
+      if (line.appendToBuffer) {
+        if (buffer) {
+          buffer = buffer + '\n    + ' + line.content;
+        } else {
+          buffer = line.content;
+        }
+      } else {
+        if (buffer) {
+          source += 'buffer += ' + buffer + ';\n  ';
+          buffer = undefined;
+        }
+        source += line + '\n  ';
+      }
+    }
+    return source;
+  },
+
+  // [blockValue]
+  //
+  // On stack, before: hash, inverse, program, value
+  // On stack, after: return value of blockHelperMissing
+  //
+  // The purpose of this opcode is to take a block of the form
+  // `{{#foo}}...{{/foo}}`, resolve the value of `foo`, and
+  // replace it on the stack with the result of properly
+  // invoking blockHelperMissing.
+  blockValue: function() {
+    this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';
+
+    var params = ["depth0"];
+    this.setupParams(0, params);
+
+    this.replaceStack(function(current) {
+      params.splice(1, 0, current);
+      return "blockHelperMissing.call(" + params.join(", ") + ")";
+    });
+  },
+
+  // [ambiguousBlockValue]
+  //
+  // On stack, before: hash, inverse, program, value
+  // Compiler value, before: lastHelper=value of last found helper, if any
+  // On stack, after, if no lastHelper: same as [blockValue]
+  // On stack, after, if lastHelper: value
+  ambiguousBlockValue: function() {
+    this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';
+
+    var params = ["depth0"];
+    this.setupParams(0, params);
+
+    var current = this.topStack();
+    params.splice(1, 0, current);
+
+    // Use the options value generated from the invocation
+    params[params.length-1] = 'options';
+
+    this.source.push("if (!" + this.lastHelper + ") { " + current + " = blockHelperMissing.call(" + params.join(", ") + "); }");
+  },
+
+  // [appendContent]
+  //
+  // On stack, before: ...
+  // On stack, after: ...
+  //
+  // Appends the string value of `content` to the current buffer
+  appendContent: function(content) {
+    this.source.push(this.appendToBuffer(this.quotedString(content)));
+  },
+
+  // [append]
+  //
+  // On stack, before: value, ...
+  // On stack, after: ...
+  //
+  // Coerces `value` to a String and appends it to the current buffer.
+  //
+  // If `value` is truthy, or 0, it is coerced into a string and appended
+  // Otherwise, the empty string is appended
+  append: function() {
+    // Force anything that is inlined onto the stack so we don't have duplication
+    // when we examine local
+    this.flushInline();
+    var local = this.popStack();
+    this.source.push("if(" + local + " || " + local + " === 0) { " + this.appendToBuffer(local) + " }");
+    if (this.environment.isSimple) {
+      this.source.push("else { " + this.appendToBuffer("''") + " }");
+    }
+  },
+
+  // [appendEscaped]
+  //
+  // On stack, before: value, ...
+  // On stack, after: ...
+  //
+  // Escape `value` and append it to the buffer
+  appendEscaped: function() {
+    this.context.aliases.escapeExpression = 'this.escapeExpression';
+
+    this.source.push(this.appendToBuffer("escapeExpression(" + this.popStack() + ")"));
+  },
+
+  // [getContext]
+  //
+  // On stack, before: ...
+  // On stack, after: ...
+  // Compiler value, after: lastContext=depth
+  //
+  // Set the value of the `lastContext` compiler value to the depth
+  getContext: function(depth) {
+    if(this.lastContext !== depth) {
+      this.lastContext = depth;
+    }
+  },
+
+  // [lookupOnContext]
+  //
+  // On stack, before: ...
+  // On stack, after: currentContext[name], ...
+  //
+  // Looks up the value of `name` on the current context and pushes
+  // it onto the stack.
+  lookupOnContext: function(name) {
+    this.push(this.nameLookup('depth' + this.lastContext, name, 'context'));
+  },
+
+  // [pushContext]
+  //
+  // On stack, before: ...
+  // On stack, after: currentContext, ...
+  //
+  // Pushes the value of the current context onto the stack.
+  pushContext: function() {
+    this.pushStackLiteral('depth' + this.lastContext);
+  },
+
+  // [resolvePossibleLambda]
+  //
+  // On stack, before: value, ...
+  // On stack, after: resolved value, ...
+  //
+  // If the `value` is a lambda, replace it on the stack by
+  // the return value of the lambda
+  resolvePossibleLambda: function() {
+    this.context.aliases.functionType = '"function"';
+
+    this.replaceStack(function(current) {
+      return "typeof " + current + " === functionType ? " + current + ".apply(depth0) : " + current;
+    });
+  },
+
+  // [lookup]
+  //
+  // On stack, before: value, ...
+  // On stack, after: value[name], ...
+  //
+  // Replace the value on the stack with the result of looking
+  // up `name` on `value`
+  lookup: function(name) {
+    this.replaceStack(function(current) {
+      return current + " == null || " + current + " === false ? " + current + " : " + this.nameLookup(current, name, 'context');
+    });
+  },
+
+  // [lookupData]
+  //
+  // On stack, before: ...
+  // On stack, after: data[id], ...
+  //
+  // Push the result of looking up `id` on the current data
+  lookupData: function(id) {
+    this.push('data');
+  },
+
+  // [pushStringParam]
+  //
+  // On stack, before: ...
+  // On stack, after: string, currentContext, ...
+  //
+  // This opcode is designed for use in string mode, which
+  // provides the string value of a parameter along with its
+  // depth rather than resolving it immediately.
+  pushStringParam: function(string, type) {
+    this.pushStackLiteral('depth' + this.lastContext);
+
+    this.pushString(type);
+
+    if (typeof string === 'string') {
+      this.pushString(string);
+    } else {
+      this.pushStackLiteral(string);
+    }
+  },
+
+  emptyHash: function() {
+    this.pushStackLiteral('{}');
+
+    if (this.options.stringParams) {
+      this.register('hashTypes', '{}');
+      this.register('hashContexts', '{}');
+    }
+  },
+  pushHash: function() {
+    this.hash = {values: [], types: [], contexts: []};
+  },
+  popHash: function() {
+    var hash = this.hash;
+    this.hash = undefined;
+
+    if (this.options.stringParams) {
+      this.register('hashContexts', '{' + hash.contexts.join(',') + '}');
+      this.register('hashTypes', '{' + hash.types.join(',') + '}');
+    }
+    this.push('{\n    ' + hash.values.join(',\n    ') + '\n  }');
+  },
+
+  // [pushString]
+  //
+  // On stack, before: ...
+  // On stack, after: quotedString(string), ...
+  //
+  // Push a quoted version of `string` onto the stack
+  pushString: function(string) {
+    this.pushStackLiteral(this.quotedString(string));
+  },
+
+  // [push]
+  //
+  // On stack, before: ...
+  // On stack, after: expr, ...
+  //
+  // Push an expression onto the stack
+  push: function(expr) {
+    this.inlineStack.push(expr);
+    return expr;
+  },
+
+  // [pushLiteral]
+  //
+  // On stack, before: ...
+  // On stack, after: value, ...
+  //
+  // Pushes a value onto the stack. This operation prevents
+  // the compiler from creating a temporary variable to hold
+  // it.
+  pushLiteral: function(value) {
+    this.pushStackLiteral(value);
+  },
+
+  // [pushProgram]
+  //
+  // On stack, before: ...
+  // On stack, after: program(guid), ...
+  //
+  // Push a program expression onto the stack. This takes
+  // a compile-time guid and converts it into a runtime-accessible
+  // expression.
+  pushProgram: function(guid) {
+    if (guid != null) {
+      this.pushStackLiteral(this.programExpression(guid));
+    } else {
+      this.pushStackLiteral(null);
+    }
+  },
+
+  // [invokeHelper]
+  //
+  // On stack, before: hash, inverse, program, params..., ...
+  // On stack, after: result of helper invocation
+  //
+  // Pops off the helper's parameters, invokes the helper,
+  // and pushes the helper's return value onto the stack.
+  //
+  // If the helper is not found, `helperMissing` is called.
+  invokeHelper: function(paramSize, name) {
+    this.context.aliases.helperMissing = 'helpers.helperMissing';
+
+    var helper = this.lastHelper = this.setupHelper(paramSize, name, true);
+    var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
+
+    this.push(helper.name + ' || ' + nonHelper);
+    this.replaceStack(function(name) {
+      return name + ' ? ' + name + '.call(' +
+          helper.callParams + ") " + ": helperMissing.call(" +
+          helper.helperMissingParams + ")";
+    });
+  },
+
+  // [invokeKnownHelper]
+  //
+  // On stack, before: hash, inverse, program, params..., ...
+  // On stack, after: result of helper invocation
+  //
+  // This operation is used when the helper is known to exist,
+  // so a `helperMissing` fallback is not required.
+  invokeKnownHelper: function(paramSize, name) {
+    var helper = this.setupHelper(paramSize, name);
+    this.push(helper.name + ".call(" + helper.callParams + ")");
+  },
+
+  // [invokeAmbiguous]
+  //
+  // On stack, before: hash, inverse, program, params..., ...
+  // On stack, after: result of disambiguation
+  //
+  // This operation is used when an expression like `{{foo}}`
+  // is provided, but we don't know at compile-time whether it
+  // is a helper or a path.
+  //
+  // This operation emits more code than the other options,
+  // and can be avoided by passing the `knownHelpers` and
+  // `knownHelpersOnly` flags at compile-time.
+  invokeAmbiguous: function(name, helperCall) {
+    this.context.aliases.functionType = '"function"';
+
+    this.pushStackLiteral('{}');    // Hash value
+    var helper = this.setupHelper(0, name, helperCall);
+
+    var helperName = this.lastHelper = this.nameLookup('helpers', name, 'helper');
+
+    var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
+    var nextStack = this.nextStack();
+
+    this.source.push('if (' + nextStack + ' = ' + helperName + ') { ' + nextStack + ' = ' + nextStack + '.call(' + helper.callParams + '); }');
+    this.source.push('else { ' + nextStack + ' = ' + nonHelper + '; ' + nextStack + ' = typeof ' + nextStack + ' === functionType ? ' + nextStack + '.apply(depth0) : ' + nextStack + '; }');
+  },
+
+  // [invokePartial]
+  //
+  // On stack, before: context, ...
+  // On stack after: result of partial invocation
+  //
+  // This operation pops off a context, invokes a partial with that context,
+  // and pushes the result of the invocation back.
+  invokePartial: function(name) {
+    var params = [this.nameLookup('partials', name, 'partial'), "'" + name + "'", this.popStack(), "helpers", "partials"];
+
+    if (this.options.data) {
+      params.push("data");
+    }
+
+    this.context.aliases.self = "this";
+    this.push("self.invokePartial(" + params.join(", ") + ")");
+  },
+
+  // [assignToHash]
+  //
+  // On stack, before: value, hash, ...
+  // On stack, after: hash, ...
+  //
+  // Pops a value and hash off the stack, assigns `hash[key] = value`
+  // and pushes the hash back onto the stack.
+  assignToHash: function(key) {
+    var value = this.popStack(),
+        context,
+        type;
+
+    if (this.options.stringParams) {
+      type = this.popStack();
+      context = this.popStack();
+    }
+
+    var hash = this.hash;
+    if (context) {
+      hash.contexts.push("'" + key + "': " + context);
+    }
+    if (type) {
+      hash.types.push("'" + key + "': " + type);
+    }
+    hash.values.push("'" + key + "': (" + value + ")");
+  },
+
+  // HELPERS
+
+  compiler: JavaScriptCompiler,
+
+  compileChildren: function(environment, options) {
+    var children = environment.children, child, compiler;
+
+    for(var i=0, l=children.length; i<l; i++) {
+      child = children[i];
+      compiler = new this.compiler();
+
+      var index = this.matchExistingProgram(child);
+
+      if (index == null) {
+        this.context.programs.push('');     // Placeholder to prevent name conflicts for nested children
+        index = this.context.programs.length;
+        child.index = index;
+        child.name = 'program' + index;
+        this.context.programs[index] = compiler.compile(child, options, this.context);
+        this.context.environments[index] = child;
+      } else {
+        child.index = index;
+        child.name = 'program' + index;
+      }
+    }
+  },
+  matchExistingProgram: function(child) {
+    for (var i = 0, len = this.context.environments.length; i < len; i++) {
+      var environment = this.context.environments[i];
+      if (environment && environment.equals(child)) {
+        return i;
+      }
+    }
+  },
+
+  programExpression: function(guid) {
+    this.context.aliases.self = "this";
+
+    if(guid == null) {
+      return "self.noop";
+    }
+
+    var child = this.environment.children[guid],
+        depths = child.depths.list, depth;
+
+    var programParams = [child.index, child.name, "data"];
+
+    for(var i=0, l = depths.length; i<l; i++) {
+      depth = depths[i];
+
+      if(depth === 1) { programParams.push("depth0"); }
+      else { programParams.push("depth" + (depth - 1)); }
+    }
+
+    return (depths.length === 0 ? "self.program(" : "self.programWithDepth(") + programParams.join(", ") + ")";
+  },
+
+  register: function(name, val) {
+    this.useRegister(name);
+    this.source.push(name + " = " + val + ";");
+  },
+
+  useRegister: function(name) {
+    if(!this.registers[name]) {
+      this.registers[name] = true;
+      this.registers.list.push(name);
+    }
+  },
+
+  pushStackLiteral: function(item) {
+    return this.push(new Literal(item));
+  },
+
+  pushStack: function(item) {
+    this.flushInline();
+
+    var stack = this.incrStack();
+    if (item) {
+      this.source.push(stack + " = " + item + ";");
+    }
+    this.compileStack.push(stack);
+    return stack;
+  },
+
+  replaceStack: function(callback) {
+    var prefix = '',
+        inline = this.isInline(),
+        stack;
+
+    // If we are currently inline then we want to merge the inline statement into the
+    // replacement statement via ','
+    if (inline) {
+      var top = this.popStack(true);
+
+      if (top instanceof Literal) {
+        // Literals do not need to be inlined
+        stack = top.value;
+      } else {
+        // Get or create the current stack name for use by the inline
+        var name = this.stackSlot ? this.topStackName() : this.incrStack();
+
+        prefix = '(' + this.push(name) + ' = ' + top + '),';
+        stack = this.topStack();
+      }
+    } else {
+      stack = this.topStack();
+    }
+
+    var item = callback.call(this, stack);
+
+    if (inline) {
+      if (this.inlineStack.length || this.compileStack.length) {
+        this.popStack();
+      }
+      this.push('(' + prefix + item + ')');
+    } else {
+      // Prevent modification of the context depth variable. Through replaceStack
+      if (!/^stack/.test(stack)) {
+        stack = this.nextStack();
+      }
+
+      this.source.push(stack + " = (" + prefix + item + ");");
+    }
+    return stack;
+  },
+
+  nextStack: function() {
+    return this.pushStack();
+  },
+
+  incrStack: function() {
+    this.stackSlot++;
+    if(this.stackSlot > this.stackVars.length) { this.stackVars.push("stack" + this.stackSlot); }
+    return this.topStackName();
+  },
+  topStackName: function() {
+    return "stack" + this.stackSlot;
+  },
+  flushInline: function() {
+    var inlineStack = this.inlineStack;
+    if (inlineStack.length) {
+      this.inlineStack = [];
+      for (var i = 0, len = inlineStack.length; i < len; i++) {
+        var entry = inlineStack[i];
+        if (entry instanceof Literal) {
+          this.compileStack.push(entry);
+        } else {
+          this.pushStack(entry);
+        }
+      }
+    }
+  },
+  isInline: function() {
+    return this.inlineStack.length;
+  },
+
+  popStack: function(wrapped) {
+    var inline = this.isInline(),
+        item = (inline ? this.inlineStack : this.compileStack).pop();
+
+    if (!wrapped && (item instanceof Literal)) {
+      return item.value;
+    } else {
+      if (!inline) {
+        this.stackSlot--;
+      }
+      return item;
+    }
+  },
+
+  topStack: function(wrapped) {
+    var stack = (this.isInline() ? this.inlineStack : this.compileStack),
+        item = stack[stack.length - 1];
+
+    if (!wrapped && (item instanceof Literal)) {
+      return item.value;
+    } else {
+      return item;
+    }
+  },
+
+  quotedString: function(str) {
+    return '"' + str
+      .replace(/\\/g, '\\\\')
+      .replace(/"/g, '\\"')
+      .replace(/\n/g, '\\n')
+      .replace(/\r/g, '\\r')
+      .replace(/\u2028/g, '\\u2028')   // Per Ecma-262 7.3 + 7.8.4
+      .replace(/\u2029/g, '\\u2029') + '"';
+  },
+
+  setupHelper: function(paramSize, name, missingParams) {
+    var params = [];
+    this.setupParams(paramSize, params, missingParams);
+    var foundHelper = this.nameLookup('helpers', name, 'helper');
+
+    return {
+      params: params,
+      name: foundHelper,
+      callParams: ["depth0"].concat(params).join(", "),
+      helperMissingParams: missingParams && ["depth0", this.quotedString(name)].concat(params).join(", ")
+    };
+  },
+
+  // the params and contexts arguments are passed in arrays
+  // to fill in
+  setupParams: function(paramSize, params, useRegister) {
+    var options = [], contexts = [], types = [], param, inverse, program;
+
+    options.push("hash:" + this.popStack());
+
+    inverse = this.popStack();
+    program = this.popStack();
+
+    // Avoid setting fn and inverse if neither are set. This allows
+    // helpers to do a check for `if (options.fn)`
+    if (program || inverse) {
+      if (!program) {
+        this.context.aliases.self = "this";
+        program = "self.noop";
+      }
+
+      if (!inverse) {
+       this.context.aliases.self = "this";
+        inverse = "self.noop";
+      }
+
+      options.push("inverse:" + inverse);
+      options.push("fn:" + program);
+    }
+
+    for(var i=0; i<paramSize; i++) {
+      param = this.popStack();
+      params.push(param);
+
+      if(this.options.stringParams) {
+        types.push(this.popStack());
+        contexts.push(this.popStack());
+      }
+    }
+
+    if (this.options.stringParams) {
+      options.push("contexts:[" + contexts.join(",") + "]");
+      options.push("types:[" + types.join(",") + "]");
+      options.push("hashContexts:hashContexts");
+      options.push("hashTypes:hashTypes");
+    }
+
+    if(this.options.data) {
+      options.push("data:data");
+    }
+
+    options = "{" + options.join(",") + "}";
+    if (useRegister) {
+      this.register('options', options);
+      params.push('options');
+    } else {
+      params.push(options);
+    }
+    return params.join(", ");
+  }
+};
+
+var reservedWords = (
+  "break else new var" +
+  " case finally return void" +
+  " catch for switch while" +
+  " continue function this with" +
+  " default if throw" +
+  " delete in try" +
+  " do instanceof typeof" +
+  " abstract enum int short" +
+  " boolean export interface static" +
+  " byte extends long super" +
+  " char final native synchronized" +
+  " class float package throws" +
+  " const goto private transient" +
+  " debugger implements protected volatile" +
+  " double import public let yield"
+).split(" ");
+
+var compilerWords = JavaScriptCompiler.RESERVED_WORDS = {};
+
+for(var i=0, l=reservedWords.length; i<l; i++) {
+  compilerWords[reservedWords[i]] = true;
+}
+
+JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
+  if(!JavaScriptCompiler.RESERVED_WORDS[name] && /^[a-zA-Z_$][0-9a-zA-Z_$]+$/.test(name)) {
+    return true;
+  }
+  return false;
+};
+
+// END(BROWSER)
+
+return Handlebars;
+
+};