55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
// { dg-do compile { target c++11 } }
|
|
|
|
// Copyright (C) 2016-2018 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 <type_traits>
|
|
#include <utility>
|
|
|
|
struct derived;
|
|
struct base
|
|
{
|
|
operator derived & () &;
|
|
operator derived const & () const &;
|
|
operator derived && () &&;
|
|
};
|
|
|
|
struct derived : base {};
|
|
|
|
base::operator derived & () &
|
|
{
|
|
return *static_cast<derived *>(this);
|
|
}
|
|
|
|
base::operator derived const & () const &
|
|
{
|
|
return *static_cast<derived const *>(this);
|
|
}
|
|
|
|
base::operator derived && () &&
|
|
{
|
|
return std::move(*static_cast<derived *>(this));
|
|
}
|
|
|
|
int main()
|
|
{
|
|
base b;
|
|
derived&& d(static_cast<derived&&>(std::move(b)));
|
|
derived&& d2(std::move(b));
|
|
static_assert(std::is_constructible<derived&&, base&&>::value, "");
|
|
}
|