Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / ext / pb_ds / example / priority_queue_erase_if.cc

diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/priority_queue_erase_if.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/priority_queue_erase_if.cc
new file mode 100644 (file)
index 0000000..0f3ca1f
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/pb_ds/example/priority_queue_erase_if.cc
@@ -0,0 +1,67 @@
+// -*- 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 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 __gnu_pbds;
+
+int
+main()
+{
+  __gnu_pbds::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);
+}
+