Damien L-G 42ba740aff
[libc++] Implement C++20 atomic_ref (#76647)
Implement the std::atomic_ref class template by reusing atomic_base_impl.
Based on the work from https://reviews.llvm.org/D72240
2024-05-21 15:54:08 -07:00

46 lines
1.1 KiB
C++

//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// XFAIL: !has-64-bit-atomics
// XFAIL: !has-1024-bit-atomics
// operator T() const noexcept;
#include <atomic>
#include <cassert>
#include <type_traits>
#include "atomic_helpers.h"
#include "test_helper.h"
#include "test_macros.h"
template <typename T>
struct TestConvert {
void operator()() const {
T x(T(1));
T copy = x;
std::atomic_ref<T> const a(copy);
T converted = a;
assert(converted == x);
ASSERT_NOEXCEPT(T(a));
static_assert(std::is_nothrow_convertible_v<std::atomic_ref<T>, T>);
auto store = [](std::atomic_ref<T> const& y, T, T new_val) { y.store(new_val); };
auto load = [](std::atomic_ref<T> const& y) { return static_cast<T>(y); };
test_seq_cst<T>(store, load);
}
};
int main(int, char**) {
TestEachAtomicType<TestConvert>()();
return 0;
}