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Diffstat (limited to 'libstdc++-v3/testsuite/ext/pb_ds/example/basic_priority_queue.cc')
-rw-r--r-- | libstdc++-v3/testsuite/ext/pb_ds/example/basic_priority_queue.cc | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/basic_priority_queue.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/basic_priority_queue.cc new file mode 100644 index 00000000000..cc7641c2405 --- /dev/null +++ b/libstdc++-v3/testsuite/ext/pb_ds/example/basic_priority_queue.cc @@ -0,0 +1,130 @@ +// -*- 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 basic_priority_queue_example.cpp + * A basic example showing how to use priority queues. + */ + +/** + * This example shows how to use priority queues. It defines a + * function performing a sequence of operations on + * a generic container. It then calls this function with some containers. + */ + +#include <cassert> +#include <iostream> +#include <ext/pb_ds/priority_queue.hpp> + +using namespace std; +using namespace pb_ds; +using namespace pb_ds; + +// The following function performs a sequence of operations on a +// priority queue object storing integers. +template<class Cntnr> +void +some_op_sequence(Cntnr& r_c) +{ + assert(r_c.empty()); + assert(r_c.size() == 0); + + for (size_t i = 0; i < 10; ++i) + r_c.push(i); + cout << endl << "All values in the container:" << endl; + + typedef typename Cntnr::const_iterator const_iterator; + for (const_iterator it = r_c.begin(); it != r_c.end(); ++it) + cout <<* it << endl; + assert(!r_c.empty()); + assert(r_c.size() == 10); + + cout << "Popping all values: " << endl; + while (!r_c.empty()) + { + cout << r_c.top() << endl; + r_c.pop(); + } + assert(r_c.empty()); + assert(r_c.size() == 0); + + cout << endl; +} + +int main() +{ + { + // Perform operations on a pairing-heap queue. + cout << "Pairing heap" << endl; + pb_ds::priority_queue<int, less<int>, pairing_heap_tag> c; + some_op_sequence(c); + } + + { + // Perform operations on a binomial-heap queue. + cout << "Binomial heap" << endl; + pb_ds::priority_queue<int, less<int>, binomial_heap_tag> c; + some_op_sequence(c); + } + + { + // Perform operations on a binomial-heap queue. + cout << "Redundant-counter binomial heap" << endl; + pb_ds::priority_queue<int, less<int>, rc_binomial_heap_tag> c; + some_op_sequence(c); + } + + { + // Perform operations on a binomial-heap queue. + cout << "Binary heap" << endl; + pb_ds::priority_queue<int, less<int>, binary_heap_tag> c; + some_op_sequence(c); + } + + { + // Perform operations on a thin-heap queue. + cout << "Thin heap" << endl; + pb_ds::priority_queue<int, less<int>, thin_heap_tag> c; + some_op_sequence(c); + } + + return 0; +} |