| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // <atomic> |
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| 12 | |
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| 13 | // explicit atomic_ref(T&); |
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| 14 | |
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| 15 | #include <atomic> |
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| 16 | #include <type_traits> |
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| 17 | |
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| 18 | #include "atomic_helpers.h" |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | template <typename T> |
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| 22 | struct TestCtor { |
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| 23 | void operator()() const { |
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| 24 | // check that the constructor is explicit |
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| 25 | static_assert(!std::is_convertible_v<T, std::atomic_ref<T>>); |
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| 26 | static_assert(std::is_constructible_v<std::atomic_ref<T>, T&>); |
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| 27 | |
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| 28 | T x(T(0)); |
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| 29 | std::atomic_ref<T> a(x); |
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| 30 | (void)a; |
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| 31 | } |
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| 32 | }; |
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| 33 | |
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| 34 | int main(int, char**) { |
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| 35 | TestEachAtomicType<TestCtor>()(); |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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