| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // UNSUPPORTED: !non-lockfree-atomics |
| |
| // constexpr atomic() noexcept; |
| // constexpr atomic(floating-point-type) noexcept; |
| |
| #include <atomic> |
| #include <cassert> |
| #include <concepts> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| template <class T> |
| constinit std::atomic<T> a1 = T(); |
| |
| template <class T> |
| constinit std::atomic<T> a2 = T(5.2); |
| |
| template <class T> |
| constexpr void testOne() { |
| static_assert(std::is_nothrow_constructible_v<std::atomic<T>>); |
| static_assert(std::is_nothrow_constructible_v<std::atomic<T>, T>); |
| |
| // constexpr atomic() noexcept; |
| { |
| std::atomic<T> a = {}; |
| if (!TEST_IS_CONSTANT_EVALUATED) { |
| assert(a.load() == T(0)); |
| } |
| } |
| |
| // constexpr atomic(floating-point-type) noexcept; |
| { |
| std::atomic<T> a = T(5.2); |
| if (!TEST_IS_CONSTANT_EVALUATED) { |
| assert(a.load() == T(5.2)); |
| } |
| } |
| |
| // test constinit |
| if (!TEST_IS_CONSTANT_EVALUATED) { |
| assert(a1<T> == T(0.0)); |
| assert(a2<T> == T(5.2)); |
| } |
| } |
| |
| constexpr bool test() { |
| testOne<float>(); |
| testOne<double>(); |
| testOne<long double>(); |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |