| //===----------------------------------------------------------------------===// |
| // |
| // 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<input_or_output_iterator I, sentinel_for<I> S> |
| // requires (!same_as<I, S> && copyable<I>) |
| |
| #include <iterator> |
| |
| #include "test_iterators.h" |
| |
| template<class I, class S> |
| concept ValidCommonIterator = requires { |
| typename std::common_iterator<I, S>; |
| }; |
| |
| static_assert( ValidCommonIterator<int*, const int*>); |
| static_assert(!ValidCommonIterator<int, int>); // !input_or_output_iterator<I> |
| static_assert(!ValidCommonIterator<int*, float*>); // !sentinel_for<S, I> |
| static_assert(!ValidCommonIterator<int*, int*>); // !same_as<I, S> |
| static_assert(!ValidCommonIterator<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>); // !copyable<I> |
