| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // template<class R, class T> |
| // concept output_range; |
| |
| #include <ranges> |
| |
| #include <iterator> |
| #include "test_iterators.h" |
| #include "test_range.h" |
| |
| struct T { }; |
| |
| // Satisfied when it's a range and has the right iterator |
| struct GoodRange { |
| output_iterator<T*> begin(); |
| sentinel end(); |
| }; |
| static_assert(std::ranges::range<GoodRange>); |
| static_assert(std::output_iterator<std::ranges::iterator_t<GoodRange>, T>); |
| static_assert(std::ranges::output_range<GoodRange, T>); |
| |
| // Not satisfied when it's not a range |
| struct NotRange { |
| output_iterator<T*> begin(); |
| }; |
| static_assert(!std::ranges::range<NotRange>); |
| static_assert( std::output_iterator<std::ranges::iterator_t<NotRange>, T>); |
| static_assert(!std::ranges::output_range<NotRange, T>); |
| |
| // Not satisfied when the iterator is not an output_iterator |
| struct RangeWithBadIterator { |
| cpp17_input_iterator<T const*> begin(); |
| sentinel end(); |
| }; |
| static_assert( std::ranges::range<RangeWithBadIterator>); |
| static_assert(!std::output_iterator<std::ranges::iterator_t<RangeWithBadIterator>, T>); |
| static_assert(!std::ranges::output_range<RangeWithBadIterator, T>); |