Index: gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc |
diff --git a/gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc b/gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc |
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--- a/gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc |
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@@ -1,165 +0,0 @@ |
-// -*- C++ -*- |
- |
-// Copyright (C) 2005, 2006, 2009 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 3, 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 COPYING3. If not see |
-// <http://www.gnu.org/licenses/>. |
- |
- |
-// 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_multiset_example.cpp |
- * A basic example showing how to use multisets. |
- */ |
- |
- |
-// This example shows how to use "multisets". |
- |
-// In this example we build a very simple priority queue that also can |
-// be queried if an entry contains (i.e., it is slightly similar to an |
-// associative container as well as a priority queue). The priority |
-// queue adapts a "multiset". |
- |
-// (Note that there are more efficient ways for implementing this than |
-// by adapting an associative container. This is just an example for |
-// "multisets".) |
- |
-#include <iostream> |
-#include <cassert> |
-#include <ext/pb_ds/assoc_container.hpp> |
- |
-using namespace std; |
-using namespace __gnu_pbds; |
- |
-// A simple priority queue that also supports an "contains" query. |
-class contains_pq |
-{ |
-public: |
- // Pushes an integer. |
- void |
- push(int i); |
- |
- // Pops the largest integer and returns it. |
- int |
- pop(); |
- |
- // Returns true iff i is contained in the container. |
- bool |
- contains(int i) const |
- { return m_tree.find(i) != m_tree.end(); } |
- |
- // Returns true iff empty. |
- bool |
- empty() const |
- { return m_tree.empty(); } |
- |
-private: |
- // This is the container type we adapt - a "multiset". |
- // It maps each integer to the number of times it logically appears. |
- typedef |
- tree< |
- int, |
- size_t, |
- greater< |
- int> > |
- tree_t; |
- |
-private: |
- tree_t m_tree; |
-}; |
- |
-void |
-contains_pq:: |
-push(int i) |
-{ |
- // To push i, we insert to the "multiset" that i appears 0 times |
- // (which is a no-op if i already is contained), then increment the |
- // number of times i is contained by 1. |
- ++m_tree.insert(make_pair(i, 0)).first->second; |
-} |
- |
-int |
-contains_pq:: |
-pop() |
-{ |
- assert(!empty()); |
- |
- // The element we need to pop must be the first one, since tree_t is |
- // an ordered container. |
- tree_t::iterator it = m_tree.begin(); |
- |
- const int i = it->first; |
- |
- // Decrease the number of times the popped element appears in the |
- // container object. If it is 0 - we erase it. |
- if (--it->second == 0) |
- m_tree.erase(it); |
- |
- return i; |
-} |
- |
-int main() |
-{ |
- contains_pq cpq; |
- |
- // First we push some elements. |
- cpq.push(4); |
- cpq.push(3); |
- cpq.push(2); |
- cpq.push(1); |
- cpq.push(4); |
- |
- // Note that logically, 4 appears 2 times, and each of 1, 2, and 3 |
- // appear once. |
- assert(cpq.contains(4)); |
- assert(cpq.contains(3)); |
- assert(cpq.contains(2)); |
- assert(cpq.contains(1)); |
- |
- // Now pop the topmost element - it should be 4. |
- assert(cpq.pop() == 4); |
- |
- // Now logically, each of 1, 2, 3, and 4 appear once. |
- assert(cpq.contains(4)); |
- |
- // We pop the topmost element - it should be 4. |
- assert(cpq.pop() == 4); |
- |
- // 4 should not be contained any more. |
- assert(!cpq.contains(4)); |
- |
- assert(cpq.contains(3)); |
- assert(cpq.contains(2)); |
- assert(cpq.contains(1)); |
- |
- assert(cpq.pop() == 3); |
- assert(cpq.pop() == 2); |
- assert(cpq.pop() == 1); |
- |
- assert(cpq.empty()); |
- |
- return 0; |
-} |
- |