37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// Copyright (C) 2019-2020 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/>.
|
|
|
|
// { dg-options "-std=gnu++2a" }
|
|
// { dg-do compile { target c++2a } }
|
|
|
|
// P0357R3 reference_wrapper for incomplete types
|
|
|
|
#include <functional>
|
|
|
|
struct Incomplete;
|
|
|
|
template class std::reference_wrapper<Incomplete>;
|
|
|
|
Incomplete& f();
|
|
|
|
std::reference_wrapper<Incomplete> r = f();
|
|
static_assert( std::is_same_v<decltype(r)::type, Incomplete> );
|
|
static_assert( std::is_same_v<decltype(r.get()), Incomplete&> );
|
|
|
|
std::reference_wrapper r2 = f();
|
|
static_assert( std::is_same_v<decltype(r), decltype(r2)> );
|