mirror of https://github.com/procxx/kepka.git
41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
//
|
|
// 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
|