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
22template <typename T>
23concept has_bitwise_xor_assign = requires { std::declval<T const>() ^= std::declval<T>(); };
24
25template <typename T>
26struct TestDoesNotHaveBitwiseXorAssign {
27 void operator()() const { static_assert(!has_bitwise_xor_assign<std::atomic_ref<float>>); }
28};
29
30template <typename T>
31struct 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
45int 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

source code of libcxx/test/std/atomics/atomics.ref/bitwise_xor_assign.pass.cpp