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//===----------------------------------------------------------------------===//
//
// 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
// UNSUPPORTED: libcpp-no-concepts
// 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>
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