+++ /dev/null
-// Created on: 2011-01-27
-// Created by: KGV
-// Copyright (c) 2011-2014 OPEN CASCADE SAS
-//
-// This file is part of Open CASCADE Technology software library.
-//
-// This library is free software; you can redistribute it and/or modify it under
-// the terms of the GNU Lesser General Public License version 2.1 as published
-// by the Free Software Foundation, with special exception defined in the file
-// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-// distribution for complete text of the license and disclaimer of any warranty.
-//
-// Alternatively, this file may be used under the terms of Open CASCADE
-// commercial license or contractual agreement.
-
-#ifndef _NCollection_Comparator_HeaderFile
-#define _NCollection_Comparator_HeaderFile
-
-#include <Precision.hxx>
-
-/**
- * Class to define basic compare operations.
- * Basic implementation use redirection to standard C++ operators.
- * You can use standard C++ templates mechanisms to redefine these methods
- * or to inherit basic implementation to create multiple comparators
- * for same type with different rules.
- */
-template<class TheItemType>
-class NCollection_Comparator
-{
-public:
-
- NCollection_Comparator (const Standard_Real theTolerance = Precision::Confusion())
- : myTolerance (theTolerance) {}
-
- virtual ~NCollection_Comparator() {}
-
-public:
- //! Comparison functions which should be overridden
- //! if standard operators are not defined for user type.
-
- //! Should return true if Left value is greater than Right
- virtual Standard_Boolean IsGreater (const TheItemType& theLeft, const TheItemType& theRight) const
- {
- return theLeft > theRight;
- }
-
- //! Should return true if values are equal
- virtual Standard_Boolean IsEqual (const TheItemType& theLeft, const TheItemType& theRight) const
- {
- return theLeft == theRight;
- }
-
-public:
- //! Comparison functions which may be overridden for performance reasons
-
- //! Should return true if Left value is lower than Right
- virtual Standard_Boolean IsLower (const TheItemType& theLeft, const TheItemType& theRight) const
- {
- return !IsGreater (theLeft, theRight) && !IsEqual (theLeft, theRight);
- }
-
- virtual Standard_Boolean IsLowerEqual (const TheItemType& theLeft, const TheItemType& theRight) const
- {
- return !IsGreater (theLeft, theRight);
- }
-
- virtual Standard_Boolean IsGreaterEqual (const TheItemType& theLeft, const TheItemType& theRight) const
- {
- return IsGreater (theLeft, theRight) || IsEqual (theLeft, theRight);
- }
-
-protected:
-
- Standard_Real myTolerance;
-
-};
-
-#endif /*_NCollection_Comparator_HeaderFile*/