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+// -*- 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 trait.hpp
+ * Contains traits for a random regression test
+ *    for a specific container type.
+ */
+
+#ifndef PB_DS_REGRESSION_TEST_TRAIT_HPP
+#define PB_DS_REGRESSION_TEST_TRAIT_HPP
+
+#include <regression/trait/erase_if_fn.hpp>
+
+namespace __gnu_pbds
+{
+  namespace test
+  {
+    namespace detail
+    {
+      template<typename Cntnr>
+      struct regression_test_traits
+      {
+	typedef typename Cntnr::value_type value_type;
+	typedef typename Cntnr::const_reference const_reference;
+	typedef __gnu_pbds::test::native_priority_queue<std::string, true> native_type;
+	typedef typename native_type::value_type native_value_type;
+
+	template<typename T>
+	struct erase_if_fn : public regression_test_erase_if_fn<T>
+	{ };
+
+	template<typename Gen>
+	static value_type
+        generate_value(Gen& r_gen, size_t max)
+	{ return basic_type(r_gen, max); }
+
+	static native_value_type
+        native_value(const_reference r_val)
+	{ return native_value_type(r_val); }
+
+	static bool
+        cmp(const_reference r_val, const native_value_type& r_native_val)
+	{ return val_to_string(r_val) == r_native_val; }
+
+	static std::string
+        val_to_string(const_reference r_val)
+	{ return std::string(r_val); }
+      };
+    } // namespace detail
+  } // namespace test
+} // namespace __gnu_pbds
+
+#endif