| 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| 10 | |
| 11 | // template<class In> |
| 12 | // concept input_or_output_iterator; |
| 13 | |
| 14 | #include <iterator> |
| 15 | |
| 16 | // clang-format off |
| 17 | template<std::weakly_incrementable> |
| 18 | constexpr bool check_subsumption() { |
| 19 | return false; |
| 20 | } |
| 21 | |
| 22 | template<std::input_or_output_iterator> |
| 23 | constexpr bool check_subsumption() { |
| 24 | return true; |
| 25 | } |
| 26 | // clang-format on |
| 27 | |
| 28 | static_assert(check_subsumption<int*>()); |
| 29 | |