portapack-mayhem/firmware/common/optional.hpp
2016-01-23 21:26:06 -08:00

43 lines
1.3 KiB
C++

/*
* 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__*/