| // { dg-do run { target c++11 } } |
| |
| // Copyright (C) 2013-2023 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/>. |
| |
| #include <unordered_map> |
| #include <utility> |
| |
| #include <testsuite_hooks.h> |
| |
| struct Key |
| { |
| explicit Key(const int* p) : value(p) { } |
| ~Key() { value = nullptr; } |
| |
| bool operator==(const Key& k) const |
| { return *value == *k.value; } |
| |
| const int* value; |
| }; |
| |
| struct hash |
| { |
| std::size_t operator()(const Key& k) const noexcept |
| { return *k.value; } |
| }; |
| |
| struct S |
| { |
| static int _count; |
| |
| int value; |
| operator std::pair<const Key, int>() const |
| { |
| ++_count; |
| return { Key(&value), value }; |
| } |
| }; |
| |
| int S::_count = 0; |
| |
| void test01() |
| { |
| S s[1] = { {2} }; |
| std::unordered_map<Key, int, hash> m(s, s + 1); |
| VERIFY( S::_count == 1 ); |
| |
| std::unordered_multimap<Key, int, hash> mm(s, s + 1); |
| VERIFY( S::_count == 2 ); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |