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63 lines
1.5 KiB
C++
63 lines
1.5 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++98, c++03, c++11, c++14
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// <optional>
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// optional(const optional<T>& rhs);
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#include <optional>
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#include <string>
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#include <type_traits>
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#include "test_macros.h"
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using std::optional;
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struct X {};
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struct Y
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{
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Y() = default;
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Y(const Y&) {}
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};
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struct Z
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{
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Z() = default;
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Z(Z&&) = delete;
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Z(const Z&) = delete;
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Z& operator=(Z&&) = delete;
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Z& operator=(const Z&) = delete;
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};
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int main(int, char**)
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{
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{
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using T = int;
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static_assert((std::is_trivially_copy_constructible<optional<T>>::value), "");
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constexpr optional<T> opt;
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constexpr optional<T> opt2 = opt;
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(void)opt2;
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}
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{
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using T = X;
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static_assert((std::is_trivially_copy_constructible<optional<T>>::value), "");
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constexpr optional<T> opt;
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constexpr optional<T> opt2 = opt;
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(void)opt2;
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}
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static_assert(!(std::is_trivially_copy_constructible<optional<Y>>::value), "");
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static_assert(!(std::is_trivially_copy_constructible<optional<std::string>>::value), "");
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static_assert(!(std::is_copy_constructible<optional<Z>>::value), "");
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return 0;
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}
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