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// { dg-options "-std=gnu++11" }
// Copyright (C) 2013-2016 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>
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
{
int value;
operator std::pair<const Key, int>() const { return {Key(&value), value}; }
};
int main()
{
S s[1] = { {2} };
std::unordered_map<Key, int, hash> m(s, s+1);
std::unordered_multimap<Key, int, hash> mm(s, s+1);
}
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