Imported gcc-4.4.3

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

diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/trie_split.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/trie_split.cc
new file mode 100644 (file)
index 0000000..c08eb9c
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/pb_ds/example/trie_split.cc
@@ -0,0 +1,85 @@
+// -*- 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 trie_split_example.cpp
+ * A basic example showing how to split trie-based container objects.
+ */
+
+/**
+ * This example shows how to split trie based containers, i.e., the opposite
+ * of a join operation.
+ */
+
+#include <string>
+#include <cassert>
+#include <ext/pb_ds/assoc_container.hpp>
+
+using namespace std;
+using namespace __gnu_pbds;
+
+int main()
+{
+  // A PATRICIA trie table mapping strings to chars.
+  typedef trie<string, char> map_type;
+
+  // A map_type object.
+  map_type r;
+
+  // Inserts some entries into r.
+  for (int i = 0; i < 100; ++ i)
+    r.insert(make_pair(string(i, 'a'), 'b'));
+
+  // Now split r into a different map_type object.
+
+  // larger_r will hold the larger values following the split.
+  map_type larger_r;
+
+  // Split all elements with key larger than 'a'^1000 into larger_r.
+  // This is exception free.
+  r.split(string(1000, 'a'), larger_r);
+
+  // Since there were no elements with key larger than 'a'^1000, r
+  // should be unchanged.
+  assert(r.size() == 100);
+  assert(r.begin()->first == string(""));
+
+  // Now perform a split which actually changes the content of r.
+
+  // Split all elements with key larger than "aaa" into larger_r.
+  r.split(string("aaa"), larger_r);
+
+  assert(r.size() == 4);
+  assert(larger_r.begin()->first == string("aaaa"));
+
+  return 0;
+}
+