1// { dg-options "-std=gnu++11" }
2
3// 2010-08-13  Paolo Carlini  <paolo.carlini@oracle.com>
4//
5// Copyright (C) 2010-2015 Free Software Foundation, Inc.
6//
7// This file is part of the GNU ISO C++ Library.  This library is free
8// software; you can redistribute it and/or modify it under the
9// terms of the GNU General Public License as published by the
10// Free Software Foundation; either version 3, or (at your option)
11// any later version.
12//
13// This library is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16// GNU General Public License for more details.
17//
18// You should have received a copy of the GNU General Public License along
19// with this library; see the file COPYING3.  If not see
20// <http://www.gnu.org/licenses/>.
21
22#include <unordered_set>
23#include <testsuite_hooks.h>
24
25// libstdc++/26132
26void test01()
27{
28  bool test __attribute__((unused)) = true;
29
30  for (float lf = 1.0; lf < 101.0; lf *= 10.0)
31    for (int size = 1; size <= 6561; size *= 3)
32      {
33	std::unordered_set<int> us1;
34	typedef std::unordered_set<int>::size_type size_type;
35
36	us1.max_load_factor(10.0);
37
38	for (int i = 0; i < size; ++i)
39	  us1.insert(i);
40
41	us1.max_load_factor(lf);
42
43	for (int i = 1; i <= 6561; i *= 81)
44	  {
45	    const size_type n = size * 81 / i;
46	    us1.rehash(n);
47	    VERIFY( us1.bucket_count() > us1.size() / us1.max_load_factor() );
48	    VERIFY( us1.bucket_count() >= n );
49	  }
50      }
51}
52
53int main()
54{
55  test01();
56  return 0;
57}
58