Calling a generator function returns a generator object

src/objects-inl.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 635 matching lines @@
 
 template <> inline bool Is<JSFunction>(Object* obj) {
   return obj->IsJSFunction();
 }
 
 
 TYPE_CHECKER(Code, CODE_TYPE)
 TYPE_CHECKER(Oddball, ODDBALL_TYPE)
 TYPE_CHECKER(JSGlobalPropertyCell, JS_GLOBAL_PROPERTY_CELL_TYPE)
 TYPE_CHECKER(SharedFunctionInfo, SHARED_FUNCTION_INFO_TYPE)
+TYPE_CHECKER(JSGeneratorIterator, JS_GENERATOR_ITERATOR_TYPE)
 TYPE_CHECKER(JSModule, JS_MODULE_TYPE)
 TYPE_CHECKER(JSValue, JS_VALUE_TYPE)
 TYPE_CHECKER(JSDate, JS_DATE_TYPE)
 TYPE_CHECKER(JSMessageObject, JS_MESSAGE_OBJECT_TYPE)
 
 
 bool Object::IsStringWrapper() {
   return IsJSValue() && JSValue::cast(this)->value()->IsString();
 }
 
@@ skipping 874 matching lines @@
 }
 
 
 int JSObject::GetHeaderSize() {
   InstanceType type = map()->instance_type();
   // Check for the most common kind of JavaScript object before
   // falling into the generic switch. This speeds up the internal
   // field operations considerably on average.
   if (type == JS_OBJECT_TYPE) return JSObject::kHeaderSize;
   switch (type) {
+    case JS_GENERATOR_ITERATOR_TYPE:
+      return JSGeneratorIterator::kSize;
     case JS_MODULE_TYPE:
       return JSModule::kSize;
     case JS_GLOBAL_PROXY_TYPE:
       return JSGlobalProxy::kSize;
     case JS_GLOBAL_OBJECT_TYPE:
       return JSGlobalObject::kSize;
     case JS_BUILTINS_OBJECT_TYPE:
       return JSBuiltinsObject::kSize;
     case JS_FUNCTION_TYPE:
       return JSFunction::kSize;
@@ skipping 3403 matching lines @@
 Address Foreign::foreign_address() {
   return AddressFrom<Address>(READ_INTPTR_FIELD(this, kForeignAddressOffset));
 }
 
 
 void Foreign::set_foreign_address(Address value) {
   WRITE_INTPTR_FIELD(this, kForeignAddressOffset, OffsetFrom(value));
 }
 
 
+ACCESSORS(JSGeneratorIterator, function, JSFunction, kFunctionOffset)
+ACCESSORS(JSGeneratorIterator, context, Object, kContextOffset)
+SMI_ACCESSORS(JSGeneratorIterator, continuation, kContinuationOffset)
+ACCESSORS(JSGeneratorIterator, operand_stack, Object, kOperandStackOffset)
+
+
+JSGeneratorIterator* JSGeneratorIterator::cast(Object* obj) {
+  ASSERT(obj->IsJSGeneratorIterator());
+  ASSERT(HeapObject::cast(obj)->Size() == JSGeneratorIterator::kSize);
+  return reinterpret_cast<JSGeneratorIterator*>(obj);
+}
+
+
 ACCESSORS(JSModule, context, Object, kContextOffset)
 ACCESSORS(JSModule, scope_info, ScopeInfo, kScopeInfoOffset)
 
 
 JSModule* JSModule::cast(Object* obj) {
   ASSERT(obj->IsJSModule());
   ASSERT(HeapObject::cast(obj)->Size() == JSModule::kSize);
   return reinterpret_cast<JSModule*>(obj);
 }
 
@@ skipping 1059 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_