| 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 | // <ranges> |
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| 12 | |
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| 13 | // template<class T> |
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| 14 | // concept view = ...; |
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| 15 | |
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| 16 | #include <ranges> |
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| 17 | |
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| 18 | #include "test_macros.h" |
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| 19 | |
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| 20 | struct View : std::ranges::view_base { |
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| 21 | View() = default; |
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| 22 | View(View&&) = default; |
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| 23 | View& operator=(View&&) = default; |
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| 24 | friend int* begin(View&); |
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| 25 | friend int* begin(View const&); |
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| 26 | friend int* end(View&); |
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| 27 | friend int* end(View const&); |
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| 28 | }; |
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| 29 | |
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| 30 | namespace subsume_range { |
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| 31 | template <std::ranges::view> |
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| 32 | constexpr bool test() { return true; } |
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| 33 | template <std::ranges::range> |
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| 34 | constexpr bool test() { return false; } |
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| 35 | static_assert(test<View>()); |
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| 36 | } |
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| 37 | |
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| 38 | namespace subsume_movable { |
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| 39 | template <std::ranges::view> |
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| 40 | constexpr bool test() { return true; } |
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| 41 | template <std::movable> |
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| 42 | constexpr bool test() { return false; } |
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| 43 | static_assert(test<View>()); |
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| 44 | } |
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| 45 | |
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