/* * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc. * * This file is part of PortaPack. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, * Boston, MA 02110-1301, USA. */ #ifndef __OPTIONAL_H__ #define __OPTIONAL_H__ #include <utility> template<typename T> class Optional { public: constexpr Optional() : value_ { }, valid_ { false } { }; constexpr Optional(const T& value) : value_ { value }, valid_ { true } { }; constexpr Optional(T&& value) : value_ { std::move(value) }, valid_ { true } { }; bool is_valid() const { return valid_; }; T value() const { return value_; }; private: T value_; bool valid_; }; #endif/*__OPTIONAL_H__*/