| // { dg-do compile { target c++17 } } |
| |
| // Copyright (C) 2016-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library 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, or (at your option) |
| // any later version. |
| |
| // This library 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 library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| |
| // NOTE: This makes use of the fact that we know how moveable |
| // is implemented on tuple. If the implementation changed |
| // this test may begin to fail. |
| |
| #include <tuple> |
| |
| // Not swappable, and tuple not swappable via the generic std::swap. |
| struct C { }; |
| void swap(C&, C&) = delete; |
| |
| static_assert( !std::is_swappable_v<std::tuple<int, C>> ); |
| static_assert( !std::is_swappable_v<std::tuple<C, int>> ); |
| static_assert( !std::is_swappable_v<std::tuple<int, int, C>> ); |
| static_assert( !std::is_swappable_v<std::tuple<C, int, int>> ); |
| |
| // Not swappable, and tuple not swappable via the generic std::swap. |
| struct D { D(D&&) = delete; }; |
| |
| static_assert( !std::is_swappable_v<std::tuple<int, D>> ); |
| static_assert( !std::is_swappable_v<std::tuple<D, int>> ); |
| static_assert( !std::is_swappable_v<std::tuple<int, int, D>> ); |
| static_assert( !std::is_swappable_v<std::tuple<D, int, int>> ); |
