46 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// XFAIL: !has-1024-bit-atomics11 12// operator T() const noexcept;13 14#include <atomic>15#include <cassert>16#include <type_traits>17 18#include "atomic_helpers.h"19#include "test_helper.h"20#include "test_macros.h"21 22template <typename T>23struct TestConvert {24 void operator()() const {25 T x(T(1));26 27 T copy = x;28 std::atomic_ref<T> const a(copy);29 30 T converted = a;31 assert(converted == x);32 33 ASSERT_NOEXCEPT(T(a));34 static_assert(std::is_nothrow_convertible_v<std::atomic_ref<T>, T>);35 36 auto store = [](std::atomic_ref<T> const& y, T, T new_val) { y.store(new_val); };37 auto load = [](std::atomic_ref<T> const& y) { return static_cast<T>(y); };38 test_seq_cst<T>(store, load);39 }40};41 42int main(int, char**) {43 TestEachAtomicType<TestConvert>()();44 return 0;45}46