Add initial parser support for harmony iteration

src/parser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 418 matching lines @@
   ~Parser() {
     delete reusable_preparser_;
     reusable_preparser_ = NULL;
   }
 
   bool allow_natives_syntax() const { return allow_natives_syntax_; }
   bool allow_lazy() const { return allow_lazy_; }
   bool allow_modules() { return scanner().HarmonyModules(); }
   bool allow_harmony_scoping() { return scanner().HarmonyScoping(); }
   bool allow_generators() const { return allow_generators_; }
+  bool allow_for_of() const { return allow_for_of_; }
 
   void set_allow_natives_syntax(bool allow) { allow_natives_syntax_ = allow; }
   void set_allow_lazy(bool allow) { allow_lazy_ = allow; }
   void set_allow_modules(bool allow) { scanner().SetHarmonyModules(allow); }
   void set_allow_harmony_scoping(bool allow) {
     scanner().SetHarmonyScoping(allow);
   }
   void set_allow_generators(bool allow) { allow_generators_ = allow; }
+  void set_allow_for_of(bool allow) { allow_for_of_ = allow; }
 
   // Parses the source code represented by the compilation info and sets its
   // function literal.  Returns false (and deallocates any allocated AST
   // nodes) if parsing failed.
   static bool Parse(CompilationInfo* info) { return Parser(info).Parse(); }
   bool Parse();
 
   // Returns NULL if parsing failed.
   FunctionLiteral* ParseProgram();
 
@@ skipping 275 matching lines @@
       // Any further calls to Next or peek will return the illegal token.
       // The current call must return the next token, which might already
       // have been peek'ed.
       stack_overflow_ = true;
     }
     return scanner().Next();
   }
 
   bool is_generator() const { return current_function_state_->is_generator(); }
 
+  bool CheckInOrOf(ForEachStatement::VisitMode* visit_mode);
+
   bool peek_any_identifier();
 
   INLINE(void Consume(Token::Value token));
   void Expect(Token::Value token, bool* ok);
   bool Check(Token::Value token);
   void ExpectSemicolon(bool* ok);
-  void ExpectContextualKeyword(const char* keyword, bool* ok);
+  bool CheckContextualKeyword(Vector<const char> keyword);
+  void ExpectContextualKeyword(Vector<const char> keyword, bool* ok);
 
   Handle<String> LiteralString(PretenureFlag tenured) {
     if (scanner().is_literal_ascii()) {
       return isolate_->factory()->NewStringFromAscii(
           scanner().literal_ascii_string(), tenured);
     } else {
       return isolate_->factory()->NewStringFromTwoByte(
             scanner().literal_utf16_string(), tenured);
     }
   }
@@ skipping 102 matching lines @@
   FunctionState* current_function_state_;
   Target* target_stack_;  // for break, continue statements
   v8::Extension* extension_;
   ScriptDataImpl* pre_parse_data_;
   FuncNameInferrer* fni_;
 
   Mode mode_;
   bool allow_natives_syntax_;
   bool allow_lazy_;
   bool allow_generators_;
+  bool allow_for_of_;
   bool stack_overflow_;
   // If true, the next (and immediately following) function literal is
   // preceded by a parenthesis.
   // Heuristically that means that the function will be called immediately,
   // so never lazily compile it.
   bool parenthesized_function_;
 
   Zone* zone_;
   CompilationInfo* info_;
   friend class BlockState;
@@ skipping 27 matching lines @@
  private:
   static const int kTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_