28 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 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 18template<class I, class S>19concept ValidCommonIterator = requires {20 typename std::common_iterator<I, S>;21};22 23static_assert( ValidCommonIterator<int*, const int*>);24static_assert(!ValidCommonIterator<int, int>); // !input_or_output_iterator<I>25static_assert(!ValidCommonIterator<int*, float*>); // !sentinel_for<S, I>26static_assert(!ValidCommonIterator<int*, int*>); // !same_as<I, S>27static_assert(!ValidCommonIterator<cpp20_input_iterator<int*>, sentinel_wrapper<cpp20_input_iterator<int*>>>); // !copyable<I>28