32 lines
1.0 KiB
C++
32 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// <functional>
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// template <class T>
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// reference_wrapper(T&) -> reference_wrapper<T>;
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#include <functional>
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int main(int, char**) {
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int i = 0;
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std::reference_wrapper ri(i);
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static_assert(std::is_same_v<decltype(ri), std::reference_wrapper<int>>);
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std::reference_wrapper ri2(ri);
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static_assert(std::is_same_v<decltype(ri2), std::reference_wrapper<int>>);
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const int j = 0;
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std::reference_wrapper rj(j);
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static_assert(std::is_same_v<decltype(rj), std::reference_wrapper<const int>>);
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std::reference_wrapper rj2(rj);
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static_assert(std::is_same_v<decltype(rj2), std::reference_wrapper<const int>>);
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return 0;
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}
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