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