[es6] Partially implement Reflect.ownKeys.

src/objects.cc

 // Copyright 2013 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 7803 matching lines @@
     Handle<FixedArray> storage = isolate->factory()->NewFixedArray(length);
     dictionary->CopyEnumKeysTo(*storage);
     return storage;
   }
 }
 
 
 MaybeHandle<FixedArray> JSReceiver::GetKeys(Handle<JSReceiver> object,
                                             KeyCollectionType type,
                                             KeyFilter filter,
-                                            GetKeysConversion getConversion) {
+                                            GetKeysConversion getConversion,
+                                            Enumerability enum_policy) {
   USE(ContainsOnlyValidKeys);
   Isolate* isolate = object->GetIsolate();
   KeyAccumulator accumulator(isolate, filter);
   Handle<JSFunction> arguments_function(
       JSFunction::cast(isolate->sloppy_arguments_map()->GetConstructor()));
   PrototypeIterator::WhereToEnd end = type == OWN_ONLY
                                           ? PrototypeIterator::END_AT_NON_HIDDEN
                                           : PrototypeIterator::END_AT_NULL;
+  PropertyAttributes attr_filter = static_cast<PropertyAttributes>(
+      (enum_policy == RESPECT_ENUMERABILITY ? DONT_ENUM : NONE) |
+      PRIVATE_SYMBOL);
+
   // Only collect keys if access is permitted.
   for (PrototypeIterator iter(isolate, object,
                               PrototypeIterator::START_AT_RECEIVER);
        !iter.IsAtEnd(end); iter.Advance()) {
     accumulator.NextPrototype();
     if (PrototypeIterator::GetCurrent(iter)->IsJSProxy()) {
       Handle<JSProxy> proxy = PrototypeIterator::GetCurrent<JSProxy>(iter);
       Handle<Object> args[] = { proxy };
       Handle<Object> names;
       ASSIGN_RETURN_ON_EXCEPTION(
@@ skipping 13 matching lines @@
     // Check access rights if required.
     if (current->IsAccessCheckNeeded() &&
         !isolate->MayAccess(handle(isolate->context()), current)) {
       if (iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN)) {
         isolate->ReportFailedAccessCheck(current);
         RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, FixedArray);
       }
       break;
     }
 
-    JSObject::CollectOwnElementKeys(current, &accumulator,
-                                    static_cast<PropertyAttributes>(DONT_ENUM));
+    JSObject::CollectOwnElementKeys(current, &accumulator, attr_filter);
 
     // Add the element keys from the interceptor.
     if (current->HasIndexedInterceptor()) {
       Handle<JSObject> result;
       if (JSObject::GetKeysForIndexedInterceptor(current, object)
               .ToHandle(&result)) {
         accumulator.AddElementKeysFromInterceptor(result);
       }
       RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, FixedArray);
     }
 
     if (filter == SKIP_SYMBOLS) {
+      if (enum_policy == IGNORE_ENUMERABILITY) UNIMPLEMENTED();
+
       // We can cache the computed property keys if access checks are
       // not needed and no interceptors are involved.
       //
       // We do not use the cache if the object has elements and
       // therefore it does not make sense to cache the property names
       // for arguments objects.  Arguments objects will always have
       // elements.
       // Wrapped strings have elements, but don't have an elements
       // array or dictionary.  So the fast inline test for whether to
       // use the cache says yes, so we should not create a cache.
       bool cache_enum_length =
           ((current->map()->GetConstructor() != *arguments_function) &&
            !current->IsJSValue() && !current->IsAccessCheckNeeded() &&
            !current->HasNamedInterceptor() &&
            !current->HasIndexedInterceptor());
       // Compute the property keys and cache them if possible.
       Handle<FixedArray> enum_keys =
           JSObject::GetEnumPropertyKeys(current, cache_enum_length);
       accumulator.AddKeys(enum_keys);
     } else {
       DCHECK(filter == INCLUDE_SYMBOLS);
-      PropertyAttributes attr_filter =
-          static_cast<PropertyAttributes>(DONT_ENUM | PRIVATE_SYMBOL);
       current->CollectOwnPropertyNames(&accumulator, attr_filter);
     }
 
     // Add the property keys from the interceptor.
     if (current->HasNamedInterceptor()) {
       Handle<JSObject> result;
       if (JSObject::GetKeysForNamedInterceptor(current, object)
               .ToHandle(&result)) {
         accumulator.AddKeys(result);
       }
@@ skipping 10210 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8