89 lines
2.3 KiB
C++
89 lines
2.3 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_token& lhs, const stop_token& 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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// synthesized operator != also tested.
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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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// LWG 3254 is related.
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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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template <class T>
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concept IsNoThrowInequalityComparable = 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_token>);
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static_assert(IsNoThrowInequalityComparable<std::stop_token>);
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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_token st1;
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const std::stop_token st2;
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assert(st1 == st2);
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assert(!(st1 != st2));
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}
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// only one has no state
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{
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std::stop_source ss;
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const std::stop_token st1;
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const auto st2 = ss.get_token();
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assert(!(st1 == st2));
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assert(st1 != st2);
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}
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// both has states. same source
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{
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std::stop_source ss;
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const auto st1 = ss.get_token();
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const auto st2 = ss.get_token();
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assert(st1 == st2);
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assert(!(st1 != st2));
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}
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// both has states. different sources with same states
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{
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std::stop_source ss1;
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auto ss2 = ss1;
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const auto st1 = ss1.get_token();
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const auto st2 = ss2.get_token();
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assert(st1 == st2);
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assert(!(st1 != st2));
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}
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// both has states. different sources with different states
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{
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std::stop_source ss1;
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std::stop_source ss2;
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const auto st1 = ss1.get_token();
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const auto st2 = ss2.get_token();
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assert(!(st1 == st2));
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assert(st1 != st2);
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}
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return 0;
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}
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