《STL源码剖析》-- stl_relops.h

// Filename:    stl_relops.h

// Comment By:  凝霜
// E-mail:      mdl2009@vip.qq.com
// Blog:        http://blog.youkuaiyun.com/mdl13412

// 这个文件非常简单, 提供比较运算符的重载, 任何全局的比较运算符如果需要重载
// 只需要自己提供operator <和==即可

/*
 *
 * 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) 1996,1997
 * Silicon Graphics
 *
 * 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.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 */

/* NOTE: This is an internal header file, included by other STL headers.
 *   You should not attempt to use it directly.
 */

#ifndef __SGI_STL_INTERNAL_RELOPS
#define __SGI_STL_INTERNAL_RELOPS

__STL_BEGIN_RELOPS_NAMESPACE

template <class T>
inline bool operator!=(const T& x, const T& y)
{
  return !(x == y);
}

template <class T>
inline bool operator>(const T& x, const T& y)
{
  return y < x;
}

template <class T>
inline bool operator<=(const T& x, const T& y)
{
  return !(y < x);
}

template <class T>
inline bool operator>=(const T& x, const T& y)
{
  return !(x < y);
}

__STL_END_RELOPS_NAMESPACE

#endif /* __SGI_STL_INTERNAL_RELOPS */

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