| 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: no-threads |
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| 10 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 11 | // XFAIL: availability-synchronization_library-missing |
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| 12 | |
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| 13 | // [[nodiscard]] bool stop_possible() const noexcept; |
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| 14 | // Returns: true if *this has ownership of a stop state; otherwise, false. |
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| 15 | |
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| 16 | #include <cassert> |
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| 17 | #include <stop_token> |
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| 18 | #include <type_traits> |
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| 19 | |
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| 20 | #include "test_macros.h" |
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| 21 | |
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| 22 | template <class T> |
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| 23 | concept IsStopPossibleNoexcept = requires(const T& t) { |
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| 24 | { t.stop_possible() } noexcept; |
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| 25 | }; |
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| 26 | |
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| 27 | static_assert(IsStopPossibleNoexcept<std::stop_source>); |
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| 28 | |
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| 29 | int main(int, char**) { |
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| 30 | // no state |
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| 31 | { |
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| 32 | const std::stop_source st{std::nostopstate}; |
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| 33 | assert(!st.stop_possible()); |
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| 34 | } |
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| 35 | |
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| 36 | // with state |
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| 37 | { |
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| 38 | const std::stop_source st; |
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| 39 | assert(st.stop_possible()); |
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| 40 | } |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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