/* * Copyright (C) 2012 Apple Inc. All rights reserved. * Copyright (C) 2014 Apple Inc. All rights reserved. * Copyright (C) 2015-2016 Yusuke Suzuki <utatane.tea@gmail.com>. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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 with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "JSString.h" #include "PrivateName.h" namespace JSC { class Symbol final : public JSCell { public: typedef JSCell Base; static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal | OverridesToThis; DECLARE_EXPORT_INFO; static const bool needsDestruction = true; static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) { return Structure::create(vm, globalObject, prototype, TypeInfo(SymbolType, StructureFlags), info()); } static Symbol* create(VM&); static Symbol* create(ExecState*, JSString* description); JS_EXPORT_PRIVATE static Symbol* create(VM&, SymbolImpl& uid); const PrivateName& privateName() const { return m_privateName; } String descriptiveString() const; JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const; bool getPrimitiveNumber(ExecState*, double& number, JSValue&) const; JSObject* toObject(ExecState*, JSGlobalObject*) const; double toNumber(ExecState*) const; static ptrdiff_t offsetOfSymbolImpl() { // PrivateName is just a Ref<SymbolImpl> which can just be used as a SymbolImpl*. return OBJECT_OFFSETOF(Symbol, m_privateName); } protected: static void destroy(JSCell*); Symbol(VM&); Symbol(VM&, const String&); Symbol(VM&, SymbolImpl& uid); void finishCreation(VM&); PrivateName m_privateName; }; Symbol* asSymbol(JSValue); inline Symbol* asSymbol(JSValue value) { ASSERT(value.asCell()->isSymbol()); return jsCast<Symbol*>(value.asCell()); } } // namespace JSC