ES6: Implement WeakSet

src/objects.cc

 // Copyright 2013 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 1325 matching lines @@
       double length = JSArray::cast(this)->length()->IsUndefined()
           ? 0
           : JSArray::cast(this)->length()->Number();
       accumulator->Add("<JS Array[%u]>", static_cast<uint32_t>(length));
       break;
     }
     case JS_WEAK_MAP_TYPE: {
       accumulator->Add("<JS WeakMap>");
       break;
     }
+    case JS_WEAK_SET_TYPE: {
+      accumulator->Add("<JS WeakSet>");
+      break;
+    }
     case JS_REGEXP_TYPE: {
       accumulator->Add("<JS RegExp>");
       break;
     }
     case JS_FUNCTION_TYPE: {
       JSFunction* function = JSFunction::cast(this);
       Object* fun_name = function->shared()->DebugName();
       bool printed = false;
       if (fun_name->IsString()) {
         String* str = String::cast(fun_name);
@@ skipping 290 matching lines @@
     case JS_MODULE_TYPE:
     case JS_VALUE_TYPE:
     case JS_DATE_TYPE:
     case JS_ARRAY_TYPE:
     case JS_ARRAY_BUFFER_TYPE:
     case JS_TYPED_ARRAY_TYPE:
     case JS_DATA_VIEW_TYPE:
     case JS_SET_TYPE:
     case JS_MAP_TYPE:
     case JS_WEAK_MAP_TYPE:
+    case JS_WEAK_SET_TYPE:
     case JS_REGEXP_TYPE:
     case JS_GLOBAL_PROXY_TYPE:
     case JS_GLOBAL_OBJECT_TYPE:
     case JS_BUILTINS_OBJECT_TYPE:
     case JS_MESSAGE_OBJECT_TYPE:
       JSObject::BodyDescriptor::IterateBody(this, object_size, v);
       break;
     case JS_FUNCTION_TYPE:
       reinterpret_cast<JSFunction*>(this)
           ->JSFunctionIterateBody(object_size, v);
@@ skipping 14289 matching lines @@
 
 void PropertyCell::AddDependentCode(Handle<Code> code) {
   Handle<DependentCode> codes = DependentCode::Insert(
       Handle<DependentCode>(dependent_code()),
       DependentCode::kPropertyCellChangedGroup, code);
   if (*codes != dependent_code()) set_dependent_code(*codes);
 }
 
 
 } }  // namespace v8::internal