//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka 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 3 of the License, or
// (at your option) any later version.
//
// It 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.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#pragma once

#include <mapbox/variant.hpp>

// We use base::variant<> alias and base::get_if() helper while we don't have std::variant<>.
namespace base {

template <typename... Types> using variant = mapbox::util::variant<Types...>;

template <typename T, typename... Types> inline T *get_if(variant<Types...> *v) {
	return (v && v->template is<T>()) ? &v->template get_unchecked<T>() : nullptr;
}

template <typename T, typename... Types> inline const T *get_if(const variant<Types...> *v) {
	return (v && v->template is<T>()) ? &v->template get_unchecked<T>() : nullptr;
}

} // namespace base