blob: 4aa7ca82ef81eb0e4a725277b9bfa364e4befbb6 [file] [log] [blame]
// { dg-do run { target c++11 } }
// 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 <testsuite_hooks.h>
#include <unordered_set>
namespace
{
struct hash
{
hash() = default;
hash(int modulo)
: _M_modulo(modulo)
{ }
std::size_t operator() (int val) const noexcept
{ return val % _M_modulo; }
int _M_modulo;
};
}
void
test01()
{
// static_assert(std::__cache_default<int, hash>::value,
// "Unexpected default cache value");
typedef std::unordered_set<int, hash> us_t;
us_t us1(10, hash(13));
us_t us2(10, hash(7));
VERIFY( us1.hash_function()._M_modulo == 13 );
VERIFY( us2.hash_function()._M_modulo == 7 );
const int nb = 5;
for (int i = 0; i != nb * us1.hash_function()._M_modulo; ++i)
us1.insert(i);
us_t::local_iterator lit = us1.begin(12);
us_t::local_iterator litend = us1.end(12);
VERIFY( std::distance(lit, litend) == nb );
us1.swap(us2);
VERIFY( us1.hash_function()._M_modulo == 7 );
VERIFY( us2.hash_function()._M_modulo == 13 );
VERIFY( std::distance(lit, litend) == nb );
}
int main()
{
test01();
}