| 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 T, size_t N> |
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| 12 | // inline constexpr bool enable_borrowed_range<elements_view<T, N>> = |
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| 13 | // enable_borrowed_range<T>; |
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| 14 | |
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| 15 | #include <ranges> |
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| 16 | #include <tuple> |
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| 17 | |
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| 18 | struct NonBorrowed : std::ranges::view_base { |
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| 19 | std::tuple<int>* begin(); |
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| 20 | std::tuple<int>* end(); |
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| 21 | }; |
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| 22 | |
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| 23 | struct Borrowed : std::ranges::view_base { |
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| 24 | std::tuple<int>* begin(); |
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| 25 | std::tuple<int>* end(); |
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| 26 | }; |
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| 27 | |
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| 28 | template <> |
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| 29 | inline constexpr bool std::ranges::enable_borrowed_range<Borrowed> = true; |
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| 30 | |
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| 31 | static_assert(!std::ranges::borrowed_range<std::ranges::elements_view<NonBorrowed, 0>>); |
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| 32 | static_assert(std::ranges::borrowed_range<std::ranges::elements_view<Borrowed, 0>>); |
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| 33 | |
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