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Unified Diff: gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc

Issue 3050029: [gcc] GCC 4.5.0=>4.5.1 (Closed) Base URL: ssh://git@gitrw.chromium.org:9222/nacl-toolchain.git
Patch Set: Created 10 years, 5 months ago
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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
deleted file mode 100644
index 1127f7591179029dd223b5d24c0af80981716d37..0000000000000000000000000000000000000000
--- a/gcc/libstdc++-v3/testsuite/ext/pb_ds/example/basic_multiset.cc
+++ /dev/null
@@ -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;
-}
-
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