/* * Copyright (c) 2018-2020 Atmosphère-NX * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope 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. If not, see <http://www.gnu.org/licenses/>. */ #pragma once #include <vapours/common.hpp> #include <vapours/assert.hpp> namespace ams::util { template<typename T, typename U> requires (std::is_assignable<T&, U&&>::value && std::is_copy_constructible<T>::value && std::is_move_constructible<T>::value) constexpr inline T Exchange(T *ptr, U value) { AMS_ASSERT(ptr != nullptr); auto ret = std::move(*ptr); *ptr = std::move(value); return ret; } template<typename T> constexpr inline T *Exchange(T **ptr, std::nullptr_t) { AMS_ASSERT(ptr != nullptr); auto ret(*ptr); *ptr = nullptr; return ret; } }