70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: no-threads
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// UNSUPPORTED: libcpp-has-no-experimental-stop_token
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// XFAIL: availability-synchronization_library-missing
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// stop_source(const stop_source&) noexcept;
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#include <cassert>
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#include <optional>
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#include <stop_token>
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#include <type_traits>
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#include "test_macros.h"
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static_assert(std::is_nothrow_copy_constructible_v<std::stop_source>);
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int main(int, char**) {
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{
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std::stop_source source;
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std::stop_source copy{source};
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assert(source == copy);
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assert(source.stop_possible());
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assert(!source.stop_requested());
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assert(copy.stop_possible());
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assert(!copy.stop_requested());
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source.request_stop();
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assert(source.stop_possible());
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assert(source.stop_requested());
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assert(copy.stop_possible());
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assert(copy.stop_requested());
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}
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// source counter incremented
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{
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std::optional<std::stop_source> source(std::in_place);
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auto st = source->get_token();
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assert(st.stop_possible());
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std::optional<std::stop_source> copy{source};
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source.reset();
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assert(st.stop_possible());
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copy.reset();
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assert(!st.stop_possible());
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}
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// copy from empty
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{
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std::stop_source ss1{std::nostopstate};
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std::stop_source copy{ss1};
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assert(!copy.stop_possible());
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}
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return 0;
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}
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