Implement basic code generation for arrow functions

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2786 matching lines @@
 
 
 RUNTIME_FUNCTION(Runtime_FunctionIsGenerator) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_CHECKED(JSFunction, f, 0);
   return isolate->heap()->ToBoolean(f->shared()->is_generator());
 }
 
 
+RUNTIME_FUNCTION(Runtime_FunctionIsArrow) {
+  SealHandleScope shs(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(JSFunction, f, 0);
+  return isolate->heap()->ToBoolean(f->shared()->is_arrow());
+}
+
+
 RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 1);
 
   CONVERT_ARG_CHECKED(JSFunction, f, 0);
   RUNTIME_ASSERT(f->RemovePrototype());
 
   return isolate->heap()->undefined_value();
 }
 
@@ skipping 12288 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal