libcxx/test/std/atomics/atomics.ref/ctor.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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

// <atomic>

// explicit atomic_ref(T&);

#include <atomic>
#include <type_traits>

#include "atomic_helpers.h"
#include "test_macros.h"

template <typename T>
struct TestCtor {
  void operator()() const {
    // check that the constructor is explicit
    static_assert(!std::is_convertible_v<T, std::atomic_ref<T>>);
    static_assert(std::is_constructible_v<std::atomic_ref<T>, T&>);

    T x(T(0));
    std::atomic_ref<T> a(x);
    (void)a;
  }
};

int main(int, char**) {
  TestEachAtomicType<TestCtor>()();
  return 0;
}