| 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<input_or_output_iterator I, sentinel_for<I> S> |
|---|
| 12 | // requires (!same_as<I, S> && copyable<I>) |
|---|
| 13 | |
|---|
| 14 | #include <iterator> |
|---|
| 15 | |
|---|
| 16 | #include "test_iterators.h" |
|---|
| 17 | |
|---|
| 18 | template<class I, class S> |
|---|
| 19 | concept ValidCommonIterator = requires { |
|---|
| 20 | typename std::common_iterator<I, S>; |
|---|
| 21 | }; |
|---|
| 22 | |
|---|
| 23 | static_assert( ValidCommonIterator<int*, const int*>); |
|---|
| 24 | static_assert(!ValidCommonIterator<int, int>); // !input_or_output_iterator<I> |
|---|
| 25 | static_assert(!ValidCommonIterator<int*, float*>); // !sentinel_for<S, I> |
|---|
| 26 | static_assert(!ValidCommonIterator<int*, int*>); // !same_as<I, S> |
|---|
| 27 | static_assert(!ValidCommonIterator<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>); // !copyable<I> |
|---|
| 28 | |
|---|
