portapack-mayhem/firmware/common/optional.hpp

/*
 * 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__*/