| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // template<class R, class T> |
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| 12 | // concept output_range; |
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| 13 | |
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| 14 | #include <ranges> |
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| 15 | |
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| 16 | #include <iterator> |
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| 17 | #include "test_iterators.h" |
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| 18 | #include "test_range.h" |
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| 19 | |
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| 20 | struct T { }; |
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| 21 | |
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| 22 | // Satisfied when it's a range and has the right iterator |
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| 23 | struct GoodRange { |
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| 24 | cpp17_output_iterator<T*> begin(); |
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| 25 | sentinel end(); |
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| 26 | }; |
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| 27 | static_assert(std::ranges::range<GoodRange>); |
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| 28 | static_assert(std::output_iterator<std::ranges::iterator_t<GoodRange>, T>); |
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| 29 | static_assert(std::ranges::output_range<GoodRange, T>); |
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| 30 | |
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| 31 | // Not satisfied when it's not a range |
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| 32 | struct NotRange { |
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| 33 | cpp17_output_iterator<T*> begin(); |
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| 34 | }; |
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| 35 | static_assert(!std::ranges::range<NotRange>); |
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| 36 | static_assert( std::output_iterator<std::ranges::iterator_t<NotRange>, T>); |
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| 37 | static_assert(!std::ranges::output_range<NotRange, T>); |
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| 38 | |
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| 39 | // Not satisfied when the iterator is not an output_iterator |
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| 40 | struct RangeWithBadIterator { |
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| 41 | cpp17_input_iterator<T const*> begin(); |
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| 42 | sentinel end(); |
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| 43 | }; |
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| 44 | static_assert( std::ranges::range<RangeWithBadIterator>); |
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| 45 | static_assert(!std::output_iterator<std::ranges::iterator_t<RangeWithBadIterator>, T>); |
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| 46 | static_assert(!std::ranges::output_range<RangeWithBadIterator, T>); |
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| 47 | |
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| 48 | // Test ADL-proofing. |
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| 49 | struct Incomplete; |
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| 50 | template<class T> struct Holder { T t; }; |
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| 51 | |
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| 52 | static_assert(!std::ranges::output_range<Holder<Incomplete>*, Holder<Incomplete>*>); |
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| 53 | static_assert(!std::ranges::output_range<Holder<Incomplete>*&, Holder<Incomplete>*>); |
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| 54 | static_assert(!std::ranges::output_range<Holder<Incomplete>*&&, Holder<Incomplete>*>); |
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| 55 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const, Holder<Incomplete>*>); |
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| 56 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const&, Holder<Incomplete>*>); |
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| 57 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const&&, Holder<Incomplete>*>); |
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| 58 | |
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| 59 | static_assert( std::ranges::output_range<Holder<Incomplete>*[10], Holder<Incomplete>*>); |
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| 60 | static_assert( std::ranges::output_range<Holder<Incomplete>*(&)[10], Holder<Incomplete>*>); |
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| 61 | static_assert( std::ranges::output_range<Holder<Incomplete>*(&&)[10], Holder<Incomplete>*>); |
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| 62 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const[10], Holder<Incomplete>*>); |
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| 63 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&)[10], Holder<Incomplete>*>); |
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| 64 | static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&&)[10], Holder<Incomplete>*>); |
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| 65 | |
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