stl_relops.h

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// std::rel_ops implementation -*- C++ -*-

// Copyright (C) 2001, 2002, 2004, 2005, 2008, 2010, 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
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// any later version.

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 *
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 * Hewlett-Packard Company
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 * Silicon Graphics
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/** @file bits/stl_relops.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{utility}
 *
 *  Inclusion of this file has been removed from
 *  all of the other STL headers for safety reasons, except std_utility.h.
 *  For more information, see the thread of about twenty messages starting
 *  with http://gcc.gnu.org/ml/libstdc++/2001-01/msg00223.html, or
 *  http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.ambiguous_overloads
 *
 *  Short summary: the rel_ops operators should be avoided for the present.
 */

#ifndef _STL_RELOPS_H
#define _STL_RELOPS_H 1

namespace std _GLIBCXX_VISIBILITY(default)
{
  namespace rel_ops
  {
  _GLIBCXX_BEGIN_NAMESPACE_VERSION

    /** @namespace std::rel_ops
     *  @brief  The generated relational operators are sequestered here.
     */

    /**
     *  @brief Defines @c != for arbitrary types, in terms of @c ==.
     *  @param  __x  A thing.
     *  @param  __y  Another thing.
     *  @return   __x != __y
     *
     *  This function uses @c == to determine its result.
     */
    template <class _Tp>
      inline bool
      operator!=(const _Tp& __x, const _Tp& __y)
      { return !(__x == __y); }

    /**
     *  @brief Defines @c > for arbitrary types, in terms of @c <.
     *  @param  __x  A thing.
     *  @param  __y  Another thing.
     *  @return   __x > __y
     *
     *  This function uses @c < to determine its result.
     */
    template <class _Tp>
      inline bool
      operator>(const _Tp& __x, const _Tp& __y)
      { return __y < __x; }

    /**
     *  @brief Defines @c <= for arbitrary types, in terms of @c <.
     *  @param  __x  A thing.
     *  @param  __y  Another thing.
     *  @return   __x <= __y
     *
     *  This function uses @c < to determine its result.
     */
    template <class _Tp>
      inline bool
      operator<=(const _Tp& __x, const _Tp& __y)
      { return !(__y < __x); }

    /**
     *  @brief Defines @c >= for arbitrary types, in terms of @c <.
     *  @param  __x  A thing.
     *  @param  __y  Another thing.
     *  @return   __x >= __y
     *
     *  This function uses @c < to determine its result.
     */
    template <class _Tp>
      inline bool
      operator>=(const _Tp& __x, const _Tp& __y)
      { return !(__x < __y); }

  _GLIBCXX_END_NAMESPACE_VERSION
  } // namespace rel_ops

} // namespace std

#endif /* _STL_RELOPS_H */