Imported gcc-4.4.3

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

diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/hash_find_neg.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/hash_find_neg.cc
new file mode 100644 (file)
index 0000000..e2781a0
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/pb_ds/example/hash_find_neg.cc
@@ -0,0 +1,69 @@
+// { dg-do compile }
+// -*- 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 hash_bad_find_example.cpp
+ * An example showing how *not* to use unordered containers.
+ */
+
+/**
+ * This non-compiling example shows wrong use of unordered
+ * associative-containers. These types of containers have distinct
+ * point-type and range-type iterator types.
+ **/
+
+#include <utility>
+#include <ext/pb_ds/assoc_container.hpp>
+
+using namespace std;
+using namespace __gnu_pbds;
+
+int main()
+{
+  // A collision-chaining hash table mapping ints to chars.
+  typedef cc_hash_table<int, char> map_t;
+
+  // A map_t object.
+  map_t h;
+
+  // Insert a value mapping the int 1 to the char 'a'.
+  h.insert(make_pair(1, 'a'));
+
+  // Find the entry of the key '1' the* wrong* way.
+  // The following line will not compile, since map_t::find returns a
+  // point-iterator, which, by design, is not convertible to a
+  // range-iterator.
+  map_t::iterator it = h.find(1); // { dg-error "conversion from" }
+
+  return 0;
+}
+