66 lines
1.8 KiB
C++
66 lines
1.8 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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// [[nodiscard]] bool operator==(const stop_source& lhs, const stop_source& rhs) noexcept;
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// Returns: true if lhs and rhs have ownership of the same stop state or if both lhs and rhs do not have ownership of a stop state; otherwise false.
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#include <cassert>
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#include <concepts>
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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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template <class T>
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concept IsNoThrowEqualityComparable = requires(const T& t1, const T& t2) {
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{ t1 == t2 } noexcept;
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};
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static_assert(IsNoThrowEqualityComparable<std::stop_source>);
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int main(int, char**) {
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// both no state
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{
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const std::stop_source ss1(std::nostopstate);
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const std::stop_source ss2(std::nostopstate);
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assert(ss1 == ss2);
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assert(!(ss1 != ss2));
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}
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// only one has no state
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{
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const std::stop_source ss1(std::nostopstate);
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const std::stop_source ss2;
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assert(!(ss1 == ss2));
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assert(ss1 != ss2);
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}
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// both has states. same state
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{
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const std::stop_source ss1;
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const std::stop_source ss2(ss1);
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assert(ss1 == ss2);
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assert(!(ss1 != ss2));
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}
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// both has states. different states
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{
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const std::stop_source ss1;
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const std::stop_source ss2;
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assert(!(ss1 == ss2));
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assert(ss1 != ss2);
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}
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return 0;
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}
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