| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // template<class T> |
| // concept bidirectional_iterator; |
| |
| #include <iterator> |
| |
| #include <concepts> |
| |
| template<std::forward_iterator I> |
| constexpr bool check_subsumption() { |
| return false; |
| } |
| |
| template<std::bidirectional_iterator> |
| constexpr bool check_subsumption() { |
| return true; |
| } |
| |
| static_assert(check_subsumption<int*>()); |