//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.4.23
// ----------------------------------------------------------------------------
// pcl/Relational.h - Released 2022-03-12T18:59:29Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
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// ----------------------------------------------------------------------------

#ifndef __PCL_Relational_h
#define __PCL_Relational_h

/// \file pcl/Relational.h

#include <pcl/Defs.h>

namespace pcl
{

// ----------------------------------------------------------------------------

/*!
 * \defgroup generic_relational_operators Generic Relational Operators
 *
 * This section defines the template operator functions <em>not equal to</em>,
 * <em>less than or equal</em>, <em>greater than</em>, and <em>greater than or
 * equal</em>.
 *
 * For applicability of these generic operators, the following conditions are
 * assumed for the template argument type T:
 *
 * \li For the != operator, there must be a meaningful == operator for the
 * type T.
 *
 * \li For the <=, > and >= operators, there must be a meaningful < operator
 * for the type T.
 */

/*!
 * Returns true iff two objects \a a and \a b are not equal.
 * \ingroup generic_relational_operators
 */
template <class T1, class T2> inline
bool operator !=( const T1& a, const T2& b )
{
   return !(a == b);
}

/*!
 * Returns true iff an object \a a is less than or equal to another object \a b.
 * \ingroup generic_relational_operators
 */
template <class T1, class T2> inline
bool operator <=( const T1& a, const T2& b )
{
   return !(b < a);
}

/*!
 * Returns true iff an object \a a is greater than another object \a b.
 * \ingroup generic_relational_operators
 */
template <class T1, class T2> inline
bool operator >( const T1& a, const T2& b )
{
   return b < a;
}

/*!
 * Returns true iff an object \a a is greater than or equal to another object
 * \a b.
 * \ingroup generic_relational_operators
 */
template <class T1, class T2> inline
bool operator >=( const T1& a, const T2& b )
{
   return !(a < b);
}

// ----------------------------------------------------------------------------

} // pcl

#endif  // __PCL_Relational_h

// ----------------------------------------------------------------------------
// EOF pcl/Relational.h - Released 2022-03-12T18:59:29Z