ES6 symbols: extend V8 API to support symbols

src/api.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 153 matching lines @@
   V(FunctionTemplate, FunctionTemplateInfo)    \
   V(ObjectTemplate, ObjectTemplateInfo)        \
   V(Signature, SignatureInfo)                  \
   V(AccessorSignature, FunctionTemplateInfo)   \
   V(TypeSwitch, TypeSwitchInfo)                \
   V(Data, Object)                              \
   V(RegExp, JSRegExp)                          \
   V(Object, JSObject)                          \
   V(Array, JSArray)                            \
   V(String, String)                            \
+  V(Symbol, Symbol)                            \
   V(Script, Object)                            \
   V(Function, JSFunction)                      \
   V(Message, JSObject)                         \
   V(Context, Context)                          \
   V(External, Foreign)                         \
   V(StackTrace, JSArray)                       \
   V(StackFrame, JSObject)                      \
   V(DeclaredAccessorDescriptor, DeclaredAccessorDescriptor)
 
 
 class Utils {
  public:
   static bool ReportApiFailure(const char* location, const char* message);
 
   static Local<FunctionTemplate> ToFunctionTemplate(NeanderObject obj);
   static Local<ObjectTemplate> ToObjectTemplate(NeanderObject obj);
 
   static inline Local<Context> ToLocal(
       v8::internal::Handle<v8::internal::Context> obj);
   static inline Local<Value> ToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
   static inline Local<Function> ToLocal(
       v8::internal::Handle<v8::internal::JSFunction> obj);
   static inline Local<String> ToLocal(
       v8::internal::Handle<v8::internal::String> obj);
+  static inline Local<Symbol> ToLocal(
+      v8::internal::Handle<v8::internal::Symbol> obj);
   static inline Local<RegExp> ToLocal(
       v8::internal::Handle<v8::internal::JSRegExp> obj);
   static inline Local<Object> ToLocal(
       v8::internal::Handle<v8::internal::JSObject> obj);
   static inline Local<Array> ToLocal(
       v8::internal::Handle<v8::internal::JSArray> obj);
   static inline Local<Message> MessageToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
   static inline Local<StackTrace> StackTraceToLocal(
       v8::internal::Handle<v8::internal::JSArray> obj);
@@ skipping 52 matching lines @@
 #define MAKE_TO_LOCAL(Name, From, To)                                       \
   Local<v8::To> Utils::Name(v8::internal::Handle<v8::internal::From> obj) { \
     ASSERT(obj.is_null() || !obj->IsTheHole());                             \
     return Local<To>(reinterpret_cast<To*>(obj.location()));                \
   }
 
 MAKE_TO_LOCAL(ToLocal, Context, Context)
 MAKE_TO_LOCAL(ToLocal, Object, Value)
 MAKE_TO_LOCAL(ToLocal, JSFunction, Function)
 MAKE_TO_LOCAL(ToLocal, String, String)
+MAKE_TO_LOCAL(ToLocal, Symbol, Symbol)
 MAKE_TO_LOCAL(ToLocal, JSRegExp, RegExp)
 MAKE_TO_LOCAL(ToLocal, JSObject, Object)
 MAKE_TO_LOCAL(ToLocal, JSArray, Array)
 MAKE_TO_LOCAL(ToLocal, FunctionTemplateInfo, FunctionTemplate)
 MAKE_TO_LOCAL(ToLocal, ObjectTemplateInfo, ObjectTemplate)
 MAKE_TO_LOCAL(ToLocal, SignatureInfo, Signature)
 MAKE_TO_LOCAL(AccessorSignatureToLocal, FunctionTemplateInfo, AccessorSignature)
 MAKE_TO_LOCAL(ToLocal, TypeSwitchInfo, TypeSwitch)
 MAKE_TO_LOCAL(MessageToLocal, Object, Message)
 MAKE_TO_LOCAL(StackTraceToLocal, JSArray, StackTrace)
@@ skipping 311 matching lines @@
     stress_type_ = stress_type;
   }
 
  private:
   static v8::Testing::StressType stress_type_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_API_H_