| 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 | // std::ranges::borrowed_iterator_t; |
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| 12 | |
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| 13 | #include <ranges> |
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| 14 | |
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| 15 | #include <concepts> |
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| 16 | #include <span> |
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| 17 | #include <string> |
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| 18 | #include <string_view> |
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| 19 | #include <vector> |
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| 20 | |
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| 21 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string>, std::ranges::dangling>); |
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| 22 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string&&>, std::ranges::dangling>); |
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| 23 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::vector<int> >, std::ranges::dangling>); |
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| 24 | |
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| 25 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string&>, std::string::iterator>); |
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| 26 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::string_view>, std::string_view::iterator>); |
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| 27 | static_assert(std::same_as<std::ranges::borrowed_iterator_t<std::span<int> >, std::span<int>::iterator>); |
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| 28 | |
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| 29 | template <class T> |
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| 30 | constexpr bool has_borrowed_iterator = requires { |
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| 31 | typename std::ranges::borrowed_iterator_t<T>; |
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| 32 | }; |
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| 33 | |
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| 34 | static_assert(!has_borrowed_iterator<int>); |
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| 35 | |
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