| // Copyright (C) 2019-2023 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 } } |
| |
| #include <functional> |
| |
| struct add |
| { |
| constexpr int operator()(int i, int j) const { return i + j; } |
| }; |
| |
| constexpr int |
| test01(int i, int j) |
| { |
| add a; |
| return std::bind(a, i, std::placeholders::_1)(j); |
| } |
| |
| static_assert( test01(1, 2) == 3 ); |
| |
| constexpr int |
| test02(int i, int j) |
| { |
| return std::bind<int>(add{}, i, std::placeholders::_1)(j); |
| } |
| |
| static_assert( test02(4, 5) == 9 ); |
