include/rw/_funcbase.h

// -*- C++ -*-
/***************************************************************************
 *
 * _funcbase.h - definitions of function objects base classes
 *
 * $Id$
 *
 ***************************************************************************
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
 * Software division. Licensed under the Apache License, Version 2.0 (the
 * "License");  you may  not use this file except  in compliance with the
 * License.    You    may   obtain   a   copy   of    the   License    at
 * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
 * applicable law  or agreed to  in writing,  software  distributed under
 * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
 * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
 * for the specific language governing permissions  and limitations under
 * the License.
 * 
 **************************************************************************/

#ifndef _RWSTD_RW_FUNCBASE_H_INCLUDED
#define _RWSTD_RW_FUNCBASE_H_INCLUDED

#ifndef _RWSTD_RW_DEFS_H_INCLUDED
#  include <rw/_defs.h>
#endif   // _RWSTD_RW_DEFS_H_INCLUDED


_RWSTD_NAMESPACE (std) { 


// 20.3.1 - Base
template <class _Arg, class _Result>
struct unary_function
{
    typedef _Arg    argument_type;
    typedef _Result result_type;
};


#define _RWSTD_UNARY_FUNCTION_TYPES(T, U)                                    \
  typedef _TYPENAME _STD::unary_function<T, U>::argument_type argument_type; \
  typedef _TYPENAME _STD::unary_function<T, U>::result_type   result_type


template <class _Arg1, class _Arg2, class _Result>
struct binary_function
{
    typedef _Arg1   first_argument_type;
    typedef _Arg2   second_argument_type;
    typedef _Result result_type;
};


#define _RWSTD_BINARY_FUNCTION_TYPES(T, U, V)                              \
  typedef _TYPENAME _STD::binary_function<T, U, V>::second_argument_type   \
          second_argument_type;                                            \
  typedef _TYPENAME _STD::binary_function<T, U, V>::first_argument_type    \
          first_argument_type;                                             \
  typedef _TYPENAME _STD::binary_function<T, U, V>::result_type            \
          result_type


// 20.3.3, p5
template <class _TypeT>
struct less: binary_function<_TypeT, _TypeT, bool>
{
    _RWSTD_BINARY_FUNCTION_TYPES (_TypeT, _TypeT, bool);

    result_type operator() (const first_argument_type  &__x,
                            const second_argument_type &__y) const {
        return __x < __y;
    }
};


}   // namespace std


#endif   // _RWSTD_RW_FUNCBASE_H_INCLUDED