Implement handling of arrow functions in the parser

src/factory.cc

 // Copyright 2014 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 "factory.h"
 
 #include "macro-assembler.h"
 #include "isolate-inl.h"
 #include "v8conversions.h"
 
@@ skipping 1770 matching lines @@
 
 void Factory::BecomeJSFunction(Handle<JSReceiver> object) {
   ReinitializeJSReceiver(object, JS_FUNCTION_TYPE, JSFunction::kSize);
 }
 
 
 Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
     Handle<String> name,
     int number_of_literals,
     bool is_generator,
+    bool is_arrow,
     Handle<Code> code,
     Handle<ScopeInfo> scope_info) {
   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(name);
   shared->set_code(*code);
   shared->set_scope_info(*scope_info);
+  shared->set_is_arrow(is_arrow);
   int literals_array_size = number_of_literals;
   // If the function contains object, regexp or array literals,
   // allocate extra space for a literals array prefix containing the
   // context.
   if (number_of_literals > 0) {
     literals_array_size += JSFunction::kLiteralsPrefixSize;
   }
   shared->set_num_literals(literals_array_size);
   if (is_generator) {
     shared->set_instance_class_name(isolate()->heap()->Generator_string());
@@ skipping 177 matching lines @@
   }
   function->set_prototype_or_initial_map(*prototype);
   function->set_literals_or_bindings(*empty_fixed_array());
   function->set_next_function_link(*undefined_value());
 }
 
 
 static Handle<Map> MapForNewFunction(Isolate* isolate,
                                      Handle<SharedFunctionInfo> function_info,
                                      MaybeHandle<Object> maybe_prototype) {
-  if (maybe_prototype.is_null()) {
+  if (maybe_prototype.is_null() || function_info->is_arrow()) {
     return function_info->strict_mode() == SLOPPY
         ? isolate->sloppy_function_without_prototype_map()
         : isolate->strict_function_without_prototype_map();
   }
 
   Context* context = isolate->context()->native_context();
   int map_index = Context::FunctionMapIndex(function_info->strict_mode(),
                                             function_info->is_generator());
   return Handle<Map>(Map::cast(context->get(map_index)));
 }
@@ skipping 324 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal