| // { dg-do run { target c++14 } } |
| |
| // Copyright (C) 2013-2021 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/>. |
| |
| #include <experimental/optional> |
| #include <testsuite_hooks.h> |
| |
| #include <tuple> |
| #include <string> |
| |
| namespace ns |
| { |
| struct value_type |
| { |
| int i; |
| std::string s; |
| }; |
| |
| bool |
| operator==(value_type const& lhs, value_type const& rhs) |
| { return std::tie(lhs.i, lhs.s) == std::tie(rhs.i, rhs.s); } |
| |
| bool |
| operator<(value_type const& lhs, value_type const& rhs) |
| { return std::tie(lhs.i, lhs.s) < std::tie(rhs.i, rhs.s); } |
| |
| } // namespace ns |
| |
| int main() |
| { |
| using ns::value_type; |
| using O = std::experimental::optional<value_type>; |
| |
| value_type const reference { 42, "forty-two" }; |
| |
| { |
| O o; |
| VERIFY( !(o == reference) ); |
| VERIFY( !(reference == o) ); |
| VERIFY( o != reference ); |
| VERIFY( reference != o ); |
| } |
| |
| { |
| O o { value_type { 11, "eleventy" } }; |
| VERIFY( !(o == reference) ); |
| VERIFY( !(reference == o) ); |
| VERIFY( o != reference ); |
| VERIFY( reference != o ); |
| } |
| |
| { |
| O o { value_type { 42, "forty-two" } }; |
| VERIFY( o == reference ); |
| VERIFY( reference == o ); |
| VERIFY( !(o != reference) ); |
| VERIFY( !(reference != o) ); |
| } |
| } |