// -*- C++ -*- // Copyright (C) 2005, 2006 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 2, 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 COPYING. If not, write to // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, // MA 02111-1307, USA. // As a special exception, you may use this file as part of a free // software library without restriction. Specifically, if other files // instantiate templates or use macros or inline functions from this // file, or you compile this file and link it with other files to // produce an executable, this file does not by itself cause the // resulting executable to be covered by the GNU General Public // License. This exception does not however invalidate any other // reasons why the executable file might be covered by the GNU General // Public License. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. // Permission to use, copy, modify, sell, and distribute this software // is hereby granted without fee, provided that the above copyright // notice appears in all copies, and that both that copyright notice // and this permission notice appear in supporting documentation. None // of the above authors, nor IBM Haifa Research Laboratories, make any // representation about the suitability of this software for any // purpose. It is provided "as is" without express or implied // warranty. /** * @file priority_queue_erase_if.cpp * Example showing how to conditionally erase values from a priority queue. */ /** * This example shows how to erase from a priority queue using erase_if. */ #include <functional> #include <iostream> #include <cassert> #include <ext/pb_ds/priority_queue.hpp> using namespace std; using namespace pb_ds; using namespace pb_ds; int main() { pb_ds::priority_queue<int> p; // First we insert some values into the container. for (int i = 0; i < 1000; ++i) p.push(i); assert(p.top() == 999); // Now we erase all values that satisfy some predicate, in this case // one that returns true for all those larger than 500. p.erase_if(bind1st(less<int>(), 500)); // The largest value should be now 500. assert(p.top() == 500); }