| // { dg-do compile { target c++11 } } |
| |
| // Copyright (C) 2013-2025 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/>. |
| |
| // C++11 20.8.3.4 reference_wrapper invocation [refwrap.invoke] |
| #include <functional> |
| |
| struct ABC |
| { |
| virtual bool operator()() const = 0; |
| }; |
| |
| struct Concrete : ABC |
| { |
| virtual bool operator()() const { return true; } |
| }; |
| |
| Concrete c; |
| ABC& abc = c; |
| |
| // PR libstdc++/57336 Cannot INVOKE a reference_wrapper around an abstract type |
| auto b = std::cref(abc)(); |
