| // Copyright (C) 2018-2023 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-do compile { target c++11 } } |
| |
| #include <list> |
| |
| void |
| test01() |
| { |
| // A list of int. |
| const std::list<int> nums = { 1, 2, 3, 4 }; |
| |
| // Grab the iterator type. |
| using list_itr_type = decltype( std::begin( nums ) ); |
| |
| // Confirm cend returns the same type. |
| static_assert( std::is_same< decltype( std::end( nums ) ), list_itr_type >::value, "" ); |
| |
| // The list's iterator type provides a well-formed non-member operator-() with valid return type (long int) |
| using substraction_type |
| = decltype( std::declval<list_itr_type>() - std::declval<list_itr_type>() ); // { dg-error "no match for 'operator-'" } |
| } |
