| 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 | // <iterator> |
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| 12 | |
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| 13 | // template<semiregular S> |
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| 14 | // class move_sentinel; |
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| 15 | |
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| 16 | #include <iterator> |
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| 17 | |
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| 18 | template<class T> |
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| 19 | concept HasMoveSentinel = requires { |
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| 20 | typename std::move_sentinel<T>; |
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| 21 | }; |
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| 22 | |
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| 23 | struct Semiregular {}; |
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| 24 | |
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| 25 | struct NotSemiregular { |
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| 26 | NotSemiregular(int); |
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| 27 | }; |
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| 28 | |
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| 29 | static_assert( HasMoveSentinel<int>); |
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| 30 | static_assert( HasMoveSentinel<int*>); |
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| 31 | static_assert( HasMoveSentinel<Semiregular>); |
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| 32 | static_assert(!HasMoveSentinel<NotSemiregular>); |
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| 33 | |
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