1// Copyright (C) 2014-2015 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// { dg-require-normal-mode "" }
19// { dg-require-cmath "" }
20// { dg-options "-std=gnu++11" }
21
22#include <cmath>
23#include <random>
24#include <vector>
25#include <algorithm>
26
27#include <testsuite_counter_type.h>
28#include <testsuite_hooks.h>
29
30void test01()
31{
32  bool test __attribute__((unused)) = true;
33
34  using __gnu_test::counter_type;
35  const std::size_t nb_values = 1000;
36
37  std::random_device dev;
38  std::uniform_int_distribution<int> dist;
39  std::vector<counter_type> values;
40  values.reserve(nb_values);
41  for (std::size_t i = 0; i != nb_values; ++i)
42    values.push_back(dist(dev));
43
44  std::make_heap(values.begin(), values.end());
45  values.push_back(dist(dev));
46
47  counter_type::reset();
48
49  std::push_heap(values.begin(), values.end());
50
51  VERIFY( counter_type::less_compare_count <= std::log2(values.size()) );
52}
53
54int main()
55{
56  test01();
57  return 0;
58}
59