58 lines · cpp
1//2// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.3// See https://llvm.org/LICENSE.txt for license information.4// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception5//6//===----------------------------------------------------------------------===//7 8// UNSUPPORTED: c++03, c++11, c++14, c++179// XFAIL: !has-64-bit-atomics10 11// integral-type operator|=(integral-type) const noexcept;12 13#include <atomic>14#include <cassert>15#include <concepts>16#include <type_traits>17#include <utility>18 19#include "atomic_helpers.h"20#include "test_macros.h"21 22template <typename T>23concept has_bitwise_or_assign = requires { std::declval<T const>() |= std::declval<T>(); };24 25template < typename T>26struct TestDoesNotHaveBitwiseOrAssign {27 void operator()() const { static_assert(!has_bitwise_or_assign<std::atomic_ref<T>>); }28};29 30template <typename T>31struct TestBitwiseOrAssign {32 void operator()() const {33 static_assert(std::is_integral_v<T>);34 35 T x(T(1));36 std::atomic_ref<T> const a(x);37 38 std::same_as<T> decltype(auto) y = (a |= T(2));39 assert(y == T(3));40 assert(x == T(3));41 ASSERT_NOEXCEPT(a |= T(0));42 }43};44 45int main(int, char**) {46 TestEachIntegralType<TestBitwiseOrAssign>()();47 48 TestEachFloatingPointType<TestDoesNotHaveBitwiseOrAssign>()();49 50 TestEachPointerType<TestDoesNotHaveBitwiseOrAssign>()();51 52 TestDoesNotHaveBitwiseOrAssign<bool>()();53 TestDoesNotHaveBitwiseOrAssign<UserAtomicType>()();54 TestDoesNotHaveBitwiseOrAssign<LargeUserAtomicType>()();55 56 return 0;57}58