forked from OSchip/llvm-project
37 lines
1005 B
C++
37 lines
1005 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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// constexpr optional(const optional<T>& rhs);
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// If is_trivially_copy_constructible_v<T> is true,
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// this constructor shall be a constexpr constructor.
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#include <optional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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struct S {
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constexpr S() : v_(0) {}
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S(int v) : v_(v) {}
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S(const S &rhs) : v_(rhs.v_) {} // make it not trivially copyable
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int v_;
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};
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int main()
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{
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static_assert (!std::is_trivially_copy_constructible_v<S>, "" );
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constexpr std::optional<S> o1;
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constexpr std::optional<S> o2 = o1; // not constexpr
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}
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