From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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files in the upstream repository.
---
 .../ext/pb_ds/example/hash_illegal_resize.cc       | 135 +++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 libstdc++-v3/testsuite/ext/pb_ds/example/hash_illegal_resize.cc

(limited to 'libstdc++-v3/testsuite/ext/pb_ds/example/hash_illegal_resize.cc')

diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/hash_illegal_resize.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/hash_illegal_resize.cc
new file mode 100644
index 000000000..3b239d43c
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/pb_ds/example/hash_illegal_resize.cc
@@ -0,0 +1,135 @@
+// { dg-timeout-factor 2.0 }
+
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009, 2011 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_illegal_resize_example.cpp
+ * An example of illegally externally resizing a hash-based container object.
+ */
+
+/**
+ * This example shows the case where a hash-based container object is
+ * resized to a value which it cannot accomodate at runtime. Illegal
+ * runtime resizes cause an exception.
+ */
+
+#include <ext/pb_ds/assoc_container.hpp>
+#include <ext/pb_ds/hash_policy.hpp>
+#include <ext/pb_ds/exception.hpp>
+#include <cassert>
+
+// size of test containers
+#ifdef _GLIBCXX_DEBUG
+# define SIZE 100
+# define RESIZE 20
+#else
+# define SIZE 1000
+# define RESIZE 200
+#endif
+
+using namespace std;
+using namespace __gnu_pbds;
+
+// A simple hash functor.
+// hash could serve instead of this functor, but it is not yet
+// standard everywhere.
+struct int_hash : public unary_function<int, size_t>
+{
+  inline size_t
+  operator()(const int& r_i) const
+  { return r_i; }
+};
+
+
+int main()
+{
+  // A probing hash table mapping ints to chars.
+  typedef
+    gp_hash_table<
+    int,
+    int,
+    int_hash,
+    equal_to<int>,
+    // Combining function.
+    direct_mod_range_hashing<>,
+    // Probe function.
+    quadratic_probe_fn<>,
+    // Resize policy.
+    hash_standard_resize_policy<
+    hash_prime_size_policy,
+    hash_load_check_resize_trigger<>,
+    /* Allow external access to size.
+     *     Without setting this to true, external resizing
+     *     is not possible.
+     */
+    true> >
+    map_t;
+
+  map_t g;
+
+  // Insert some elements.
+  int i;
+
+  for (i = 0; i < SIZE; ++i)
+    g[i] = 2*  i;
+
+  // Check all ok.
+  assert(g.size() == SIZE);
+  for (i = 0; i < SIZE; ++i)
+    assert(g.find(i) != g.end() && g.find(i)->second == 2 * i);
+
+  // Now attempt to resize the table to 200 (impossible).
+  bool ex_thrown = false;
+
+  try
+    {
+      g.resize(RESIZE);
+    }
+  catch(__gnu_pbds::resize_error& )
+    {
+      ex_thrown = true;
+    }
+
+  // Assert an exception was thrown. A probing table cannot contain
+  // 1000 entries in less than 1000 places.
+  assert(ex_thrown);
+
+  // Irrespective of the fact that the resize was not successful, the
+  // container object should still be in a valid state; the following
+  // checks this.
+  // Check all ok.
+  assert(g.size() == SIZE);
+  for (i = 0; i < SIZE; ++i)
+    assert(g.find(i) != g.end() && g.find(i)->second == 2 * i);
+
+  return 0;
+}
-- 
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