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 fetch_xor(integral-type, memory_order = memory_order::seq_cst) 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_fetch_xor = requires {
24 std::declval<T const>().fetch_xor(std::declval<T>());
25 std::declval<T const>().fetch_xor(std::declval<T>(), std::declval<std::memory_order>());
26};
27
28template <typename T>
29struct TestDoesNotHaveFetchXor {
30 void operator()() const { static_assert(!has_fetch_xor<std::atomic_ref<T>>); }
31};
32
33template <typename T>
34struct TestFetchXor {
35 void operator()() const {
36 static_assert(std::is_integral_v<T>);
37
38 T x(T(1));
39 std::atomic_ref<T> const a(x);
40
41 {
42 std::same_as<T> decltype(auto) y = a.fetch_xor(T(2));
43 assert(y == T(1));
44 assert(x == T(3));
45 ASSERT_NOEXCEPT(a.fetch_xor(T(0)));
46 }
47
48 {
49 std::same_as<T> decltype(auto) y = a.fetch_xor(T(2), std::memory_order_relaxed);
50 assert(y == T(3));
51 assert(x == T(1));
52 ASSERT_NOEXCEPT(a.fetch_xor(T(0), std::memory_order_relaxed));
53 }
54 }
55};
56
57int main(int, char**) {
58 TestEachIntegralType<TestFetchXor>()();
59
60 TestEachFloatingPointType<TestDoesNotHaveFetchXor>()();
61
62 TestEachPointerType<TestDoesNotHaveFetchXor>()();
63
64 TestDoesNotHaveFetchXor<bool>()();
65 TestDoesNotHaveFetchXor<UserAtomicType>()();
66 TestDoesNotHaveFetchXor<LargeUserAtomicType>()();
67
68 return 0;
69}
70

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