added type checks on fast return values

include/v8.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 5694 matching lines @@
   TYPE_CHECK(T, S);
   if (V8_UNLIKELY(handle.IsEmpty())) {
     *value_ = GetDefaultValue();
   } else {
     *value_ = *reinterpret_cast<internal::Object**>(*handle);
   }
 }
 
 template<typename T>
 void ReturnValue<T>::Set(double i) {
+  TYPE_CHECK(T, Number);
   Set(Number::New(GetIsolate(), i));
 }
 
 template<typename T>
 void ReturnValue<T>::Set(int32_t i) {
+  TYPE_CHECK(T, Integer);
   typedef internal::Internals I;
   if (V8_LIKELY(I::IsValidSmi(i))) {
     *value_ = I::IntToSmi(i);
     return;
   }
   Set(Integer::New(i, GetIsolate()));
 }
 
 template<typename T>
 void ReturnValue<T>::Set(uint32_t i) {
+  TYPE_CHECK(T, Integer);
   typedef internal::Internals I;
   // Can't simply use INT32_MAX here for whatever reason.
   bool fits_into_int32_t = (i & (1 << 31)) == 0;
   if (V8_LIKELY(fits_into_int32_t)) {
     Set(static_cast<int32_t>(i));
     return;
   }
   Set(Integer::NewFromUnsigned(i, GetIsolate()));
 }
 
 template<typename T>
 void ReturnValue<T>::Set(bool value) {
+  TYPE_CHECK(T, Boolean);
   typedef internal::Internals I;
   int root_index;
   if (value) {
     root_index = I::kTrueValueRootIndex;
   } else {
     root_index = I::kFalseValueRootIndex;
   }
   *value_ = *I::GetRoot(GetIsolate(), root_index);
 }
 
 template<typename T>
 void ReturnValue<T>::SetNull() {
+  TYPE_CHECK(T, Primitive);
   typedef internal::Internals I;
   *value_ = *I::GetRoot(GetIsolate(), I::kNullValueRootIndex);
 }
 
 template<typename T>
 void ReturnValue<T>::SetUndefined() {
+  TYPE_CHECK(T, Primitive);
   typedef internal::Internals I;
   *value_ = *I::GetRoot(GetIsolate(), I::kUndefinedValueRootIndex);
 }
 
 template<typename T>
 void ReturnValue<T>::SetEmptyString() {
+  TYPE_CHECK(T, String);
   typedef internal::Internals I;
   *value_ = *I::GetRoot(GetIsolate(), I::kEmptyStringRootIndex);
 }
 
 template<typename T>
 Isolate* ReturnValue<T>::GetIsolate() {
   // Isolate is always the pointer below the default value on the stack.
   return *reinterpret_cast<Isolate**>(&value_[-2]);
 }
 
@@ skipping 589 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_