Enable ES6 Symbols by default

src/bootstrapper.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 "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
 #include "src/extensions/free-buffer-extension.h"
@@ skipping 1159 matching lines @@
     ASSERT(!function->has_initial_map());
     function->set_initial_map(*map);
     map->set_constructor(*function);
 
     ASSERT(map->inobject_properties() > Heap::kArgumentsCalleeIndex);
     ASSERT(map->inobject_properties() > Heap::kArgumentsLengthIndex);
     ASSERT(!map->is_dictionary_map());
     ASSERT(IsFastObjectElementsKind(map->elements_kind()));
   }
 
+  {
+    // --- S y m b o l ---
+    Handle<JSFunction> symbol_fun = InstallFunction(
+        global, "Symbol", JS_VALUE_TYPE, JSValue::kSize,
+        isolate->initial_object_prototype(), Builtins::kIllegal);
+    native_context()->set_symbol_function(*symbol_fun);
+  }
+
   {  // --- aliased arguments map
     Handle<Map> map = Map::Copy(isolate->sloppy_arguments_map());
     map->set_elements_kind(SLOPPY_ARGUMENTS_ELEMENTS);
     ASSERT_EQ(2, map->pre_allocated_property_fields());
     native_context()->set_aliased_arguments_map(*map);
   }
 
   {  // --- strict mode arguments map
     const PropertyAttributes attributes =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
@@ skipping 111 matching lines @@
   *external_map = Map::AsElementsKind(initial_map, external_kind);
 }
 
 
 void Genesis::InitializeExperimentalGlobal() {
   Handle<JSObject> global = Handle<JSObject>(native_context()->global_object());
 
   // TODO(mstarzinger): Move this into Genesis::InitializeGlobal once we no
   // longer need to live behind flags, so functions get added to the snapshot.
 
-  if (FLAG_harmony_symbols) {
-    // --- S y m b o l ---
-    Handle<JSFunction> symbol_fun = InstallFunction(
-        global, "Symbol", JS_VALUE_TYPE, JSValue::kSize,
-        isolate()->initial_object_prototype(), Builtins::kIllegal);
-    native_context()->set_symbol_function(*symbol_fun);
-  }
-
   if (FLAG_harmony_collections) {
     // -- M a p
     InstallFunction(global, "Map", JS_MAP_TYPE, JSMap::kSize,
                     isolate()->initial_object_prototype(), Builtins::kIllegal);
     // -- S e t
     InstallFunction(global, "Set", JS_SET_TYPE, JSSet::kSize,
                     isolate()->initial_object_prototype(), Builtins::kIllegal);
     {   // -- S e t I t e r a t o r
       Handle<JSObject> builtins(native_context()->builtins());
       Handle<JSFunction> set_iterator_function =
@@ skipping 247 matching lines @@
   INSTALL_NATIVE(JSFunction, "BeginPerformSplice",
                  observers_begin_perform_splice);
   INSTALL_NATIVE(JSFunction, "EndPerformSplice",
                  observers_end_perform_splice);
   INSTALL_NATIVE(JSFunction, "NativeObjectObserve",
                  native_object_observe);
   INSTALL_NATIVE(JSFunction, "NativeObjectGetNotifier",
                  native_object_get_notifier);
   INSTALL_NATIVE(JSFunction, "NativeObjectNotifierPerformChange",
                  native_object_notifier_perform_change);
+  INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
 }
 
 
 void Genesis::InstallExperimentalNativeFunctions() {
   if (FLAG_harmony_proxies) {
     INSTALL_NATIVE(JSFunction, "DerivedHasTrap", derived_has_trap);
     INSTALL_NATIVE(JSFunction, "DerivedGetTrap", derived_get_trap);
     INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate);
   }
-
-  if (FLAG_harmony_symbols) {
-    INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
-  }
 }
 
 #undef INSTALL_NATIVE
 
 
 Handle<JSFunction> Genesis::InstallInternalArray(
     Handle<JSBuiltinsObject> builtins,
     const char* name,
     ElementsKind elements_kind) {
   // --- I n t e r n a l   A r r a y ---
@@ skipping 396 matching lines @@
       strcmp(ExperimentalNatives::GetScriptName(i).start(),       \
           "native " file) == 0) {                                 \
     if (!CompileExperimentalBuiltin(isolate(), i)) return false;  \
   }
 
 
 bool Genesis::InstallExperimentalNatives() {
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount();
        i++) {
-    INSTALL_EXPERIMENTAL_NATIVE(i, symbols, "symbol.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, proxies, "proxy.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection-iterator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, generators, "generator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, iteration, "array-iterator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, iteration, "string-iterator.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, strings, "harmony-string.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, arrays, "harmony-array.js")
   }
 
@@ skipping 666 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal