// -*- C++ -*-

// Copyright (C) 2005-2021 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 type_trait.hpp
 * Contains traits for a random regression test
 *    for a specific container type.
 */

#ifndef PB_DS_REGRESSION_TEST_TYPE_TRAIT_HPP
#define PB_DS_REGRESSION_TEST_TYPE_TRAIT_HPP

#include <regression/basic_type.hpp>

namespace __gnu_pbds
{
  namespace test
  {
    namespace detail
    {
      template<typename Cntnr>
      struct regression_test_type_traits
      {
	typedef Cntnr cntnr;
	typedef typename cntnr::key_type key_type;
	typedef typename cntnr::key_const_reference key_const_reference;
	typedef typename cntnr::value_type value_type;
	typedef typename cntnr::const_reference const_reference;
	typedef typename cntnr::mapped_type mapped_type;
	typedef typename cntnr::mapped_const_reference mapped_const_reference;

	template<typename Gen>
	static key_type
        generate_key(Gen& r_gen, size_t max)
	{ return basic_type(r_gen, max); }

	template<typename Gen>
	static value_type
        generate_value(Gen& r_gen, size_t max)
	{ return generate_value(r_gen, max, value_type()); }

	static key_const_reference
        extract_key(const_reference r_val)
	{ return extract_key_imp(r_val); }

      private:
	typedef typename cntnr::allocator_type::template rebind<basic_type>::other
	basic_type_rebind;

	typedef typename basic_type_rebind::const_reference basic_type_const_reference;

	typedef typename cntnr::allocator_type::template rebind<std::pair<const basic_type, basic_type> >::other pair_type_rebind;
	typedef typename pair_type_rebind::const_reference pair_type_const_reference;

	template<typename Gen>
	static value_type
        generate_value(Gen& r_gen, size_t max, __gnu_pbds::null_type)
	{ return basic_type(r_gen, max); }

	template<typename Gen>
	static value_type
        generate_value(Gen& r_gen, size_t max, basic_type)
	{ return basic_type(r_gen, max); }

	template<typename Gen>
	static value_type
        generate_value(Gen& gen, size_t max,
		       std::pair<const basic_type, basic_type>)
	{ return std::make_pair(basic_type(gen, max), basic_type(gen, max)); }

	static key_const_reference
        extract_key_imp(basic_type_const_reference r_val)
	{ return r_val; }

	static key_const_reference
        extract_key_imp(pair_type_const_reference r_val)
	{ return r_val.first; }
      };
    } // namespace detail
  } // namespace test
} // namespace __gnu_pbds

#endif