| 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 | #include <iterator> |
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| 12 | |
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| 13 | #include "test_iterators.h" |
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| 14 | |
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| 15 | using sized_it = random_access_iterator<int*>; |
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| 16 | static_assert(std::sized_sentinel_for<sized_it, sized_it>); |
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| 17 | static_assert(std::sized_sentinel_for<std::move_iterator<sized_it>, std::move_iterator<sized_it>>); |
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| 18 | |
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| 19 | struct unsized_it { |
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| 20 | using value_type = int; |
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| 21 | using difference_type = std::ptrdiff_t; |
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| 22 | |
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| 23 | value_type& operator*() const; |
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| 24 | unsized_it& operator++(); |
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| 25 | bool operator==(const unsized_it&) const; |
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| 26 | difference_type operator-(const unsized_it&) const { return 0; } |
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| 27 | }; |
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| 28 | |
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| 29 | template <> |
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| 30 | inline constexpr bool std::disable_sized_sentinel_for<unsized_it, unsized_it> = true; |
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| 31 | |
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| 32 | static_assert(!std::sized_sentinel_for<unsized_it, unsized_it>); |
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| 33 | static_assert(!std::sized_sentinel_for<std::move_iterator<unsized_it>, std::move_iterator<unsized_it>>); |
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| 34 | |
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