/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* A class for holding the members of a union. */ #ifndef mozilla_dom_UnionMember_h #define mozilla_dom_UnionMember_h #include "mozilla/Alignment.h" namespace mozilla { namespace dom { // The union type has an enum to keep track of which of its UnionMembers has // been constructed. template<class T> class UnionMember { AlignedStorage2<T> mStorage; public: T& SetValue() { new (mStorage.addr()) T(); return *mStorage.addr(); } template <typename T1> T& SetValue(const T1& aValue) { new (mStorage.addr()) T(aValue); return *mStorage.addr(); } template<typename T1, typename T2> T& SetValue(const T1& aValue1, const T2& aValue2) { new (mStorage.addr()) T(aValue1, aValue2); return *mStorage.addr(); } T& Value() { return *mStorage.addr(); } const T& Value() const { return *mStorage.addr(); } void Destroy() { mStorage.addr()->~T(); } }; } // namespace dom } // namespace mozilla #endif // mozilla_dom_UnionMember_h