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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <optional>
// constexpr optional(const optional<T>& rhs);
// If is_trivially_copy_constructible_v<T> is true,
// this constructor shall be a constexpr constructor.
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
struct S {
constexpr S() : v_(0) {}
S(int v) : v_(v) {}
S(const S &rhs) : v_(rhs.v_) {} // make it not trivially copyable
int v_;
};
int main()
{
static_assert (!std::is_trivially_copy_constructible_v<S>, "" );
constexpr std::optional<S> o1;
constexpr std::optional<S> o2 = o1; // not constexpr
}
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