| // Copyright (C) 2020-2025 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/>. |
| |
| // { dg-do compile { target c++20 } } |
| |
| #include <chrono> |
| |
| using std::chrono::file_clock; |
| |
| // Cpp17Clock requirements: |
| |
| // New type so that is_clock<file_clock> specialization isn't used. |
| struct C : file_clock { }; |
| static_assert( std::chrono::is_clock_v<C> ); |
| |
| // Cpp17TrivialClock requirements: |
| |
| // A trivial clock's rep must be a numeric type, which is true for |
| // libstdc++ because we use an integral type. |
| static_assert( std::is_integral_v<file_clock::rep> ); |
| |
| // We meet the recursive Cpp17TrivialClock requirement by using the same clock: |
| static_assert( std::is_same_v<file_clock::time_point::clock, file_clock> ); |
| |
| // chrono::file_clock requirements: |
| |
| static_assert( std::is_signed_v<file_clock::rep> ); |
| static_assert( noexcept(file_clock::now()) ); |
