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// { dg-options "-std=gnu++17" }
// { dg-do compile { target c++17 } }
// Copyright (C) 2013-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <optional>
#include <string>
#include <memory>
int main()
{
{
struct X
{
explicit X(int) {}
};
std::optional<X> ox{42};
std::optional<X> ox2 = 42; // { dg-error "conversion" }
std::optional<std::unique_ptr<int>> oup{new int};
std::optional<std::unique_ptr<int>> oup2 = new int; // { dg-error "conversion" }
struct U { explicit U(std::in_place_t); };
std::optional<U> ou(std::in_place); // { dg-error "no matching" }
}
}
// { dg-prune-output "no type .*enable_if" }
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