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// { dg-options "-std=gnu++11" }
//
// Copyright (C) 2012-2016 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_set>
#include <testsuite_hooks.h>
struct num
{
int value;
num(int n) : value(n) {}
num(num const&) = default;
num& operator=(num const&) = default;
num(num&& o) : value(o.value)
{ o.value = -1; }
num& operator=(num&& o)
{
if (this != &o)
{
value = o.value;
o.value = -1;
}
return *this;
}
};
struct num_hash
{
size_t operator()(num const& a) const
{ return a.value; }
};
struct num_equal
{
static bool _S_called_on_moved_instance;
bool operator()(num const& a, num const& b) const
{
if (a.value == -1 || b.value == -1)
_S_called_on_moved_instance = true;
return a.value == b.value;
}
};
bool num_equal::_S_called_on_moved_instance = false;
// libstdc++/51866
void test01()
{
bool test __attribute__((unused)) = true;
std::unordered_multiset<num, num_hash, num_equal> mset;
mset.insert(num(1));
mset.insert(num(2));
mset.insert(num(1));
mset.insert(num(2));
VERIFY( mset.size() == 4 );
auto iter = mset.cbegin();
int x0 = (iter++)->value;
int x1 = (iter++)->value;
int x2 = (iter++)->value;
int x3 = (iter++)->value;
VERIFY( iter == mset.cend() );
VERIFY( (x0 == 1 && x1 == 1 && x2 == 2 && x3 == 2)
|| (x0 == 2 && x1 == 2 && x2 == 1 && x3 == 1) );
VERIFY( !num_equal::_S_called_on_moved_instance );
}
int main()
{
test01();
return 0;
}
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