| // Copyright (C) 2011-2021 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-do compile { target c++11 } } |
| |
| #include <functional> |
| |
| struct X |
| { |
| int operator()() const { return 0; } |
| int operator()() volatile { return 1; } |
| int operator()() const volatile { return 2; } |
| void operator()() { }; |
| }; |
| |
| void test01() |
| { |
| static_assert( std::is_placeholder<decltype(std::placeholders::_1)>::value, |
| "decltype(_1) is a placeholder type" ); |
| |
| const auto b0 = std::bind(X()); |
| static_assert( std::is_bind_expression<decltype(b0)>::value, |
| "const-qualified wrapper is a bind expression" ); |
| |
| volatile auto b1 = std::bind(X()); |
| static_assert( std::is_bind_expression<decltype(b1)>::value, |
| "volatile-qualified wrapper is a bind expression" ); |
| |
| const volatile auto b2 = std::bind(X()); |
| static_assert( std::is_bind_expression<decltype(b2)>::value, |
| "const-volatile-qualified wrapper is a bind expression" ); |
| |
| const auto b3 = std::bind<int>(X()); |
| static_assert( std::is_bind_expression<decltype(b3)>::value, |
| "const-qualified wrapper is a bind expression" ); |
| |
| volatile auto b4 = std::bind<int>(X()); |
| static_assert( std::is_bind_expression<decltype(b4)>::value, |
| "volatile-qualified wrapper is a bind expression" ); |
| |
| const volatile auto b5 = std::bind<int>(X()); |
| static_assert( std::is_bind_expression<decltype(b5)>::value, |
| "const-volatile-qualified wrapper is a bind expression" ); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |