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-exception 5 // 6 //===----------------------------------------------------------------------===// 7 8 // UNSUPPORTED: c++03, c++11, c++14, c++17 9 // XFAIL: !has-64-bit-atomics 10 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 22 template <typename T> 23 concept has_bitwise_xor_assign = requires { std::declval<T const>() ^= std::declval<T>(); }; 24 25 template <typename T> 26 struct TestDoesNotHaveBitwiseXorAssign { 27 void operator()() const { static_assert(!has_bitwise_xor_assign<std::atomic_ref<float>>); } 28 }; 29 30 template <typename T> 31 struct TestBitwiseXorAssign { 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 45 int main(int, char**) { 46 TestEachIntegralType<TestBitwiseXorAssign>()(); 47 48 TestEachFloatingPointType<TestDoesNotHaveBitwiseXorAssign>()(); 49 50 TestEachPointerType<TestDoesNotHaveBitwiseXorAssign>()(); 51 52 TestDoesNotHaveBitwiseXorAssign<bool>()(); 53 TestDoesNotHaveBitwiseXorAssign<UserAtomicType>()(); 54 TestDoesNotHaveBitwiseXorAssign<LargeUserAtomicType>()(); 55 56 return 0; 57 } 58