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File indexing completed on 2026-08-31 09:19:21

0001 // Created on: 1993-02-26
0002 // Created by: Remi LEQUETTE
0003 // Copyright (c) 1993-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016 
0017 #ifndef _TopLoc_SListOfItemLocation_HeaderFile
0018 #define _TopLoc_SListOfItemLocation_HeaderFile
0019 
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023 
0024 #include <Standard_Macro.hxx>
0025 class TopLoc_SListNodeOfItemLocation;
0026 class TopLoc_ItemLocation;
0027 
0028 //! An SListOfItemLocation is a LISP like list of Items.
0029 //! An SListOfItemLocation is :
0030 //! . Empty.
0031 //! . Or it has a Value and a  Tail  which is an other SListOfItemLocation.
0032 //!
0033 //! The Tail of an empty list is an empty list.
0034 //! SListOfItemLocation are  shared.  It  means   that they  can  be
0035 //! modified through other lists.
0036 //! SListOfItemLocation may  be used  as Iterators. They  have Next,
0037 //! More, and value methods. To iterate on the content
0038 //! of the list S just do.
0039 //!
0040 //! SListOfItemLocation Iterator;
0041 //! for (Iterator = S; Iterator.More(); Iterator.Next())
0042 //! X = Iterator.Value();
0043 class TopLoc_SListOfItemLocation
0044 {
0045 public:
0046   DEFINE_STANDARD_ALLOC
0047 
0048   //! Creates an empty List.
0049   TopLoc_SListOfItemLocation() {}
0050 
0051   //! Creates a List with <anItem> as value  and <aTail> as tail.
0052   Standard_EXPORT TopLoc_SListOfItemLocation(const TopLoc_ItemLocation&        anItem,
0053                                              const TopLoc_SListOfItemLocation& aTail);
0054 
0055   //! Creates a list from an other one. The lists  are shared.
0056   TopLoc_SListOfItemLocation(const TopLoc_SListOfItemLocation& Other)
0057       : myNode(Other.myNode)
0058   {
0059   }
0060 
0061   //! Sets  a list  from  an  other  one. The  lists are
0062   //! shared. The list itself is returned.
0063   Standard_EXPORT TopLoc_SListOfItemLocation& Assign(const TopLoc_SListOfItemLocation& Other);
0064 
0065   //! Assignment
0066   TopLoc_SListOfItemLocation& operator=(const TopLoc_SListOfItemLocation& Other)
0067   {
0068     return Assign(Other);
0069   }
0070 
0071   //! Move constructor
0072   TopLoc_SListOfItemLocation(TopLoc_SListOfItemLocation&& theOther) Standard_Noexcept
0073       : myNode(std::move(theOther.myNode))
0074   {
0075   }
0076 
0077   //! Move operator
0078   TopLoc_SListOfItemLocation& operator=(TopLoc_SListOfItemLocation&& theOther) Standard_Noexcept
0079   {
0080     myNode = std::move(theOther.myNode);
0081     return *this;
0082   }
0083 
0084   //! Return true if this list is empty
0085   Standard_Boolean IsEmpty() const { return myNode.IsNull(); }
0086 
0087   //! Sets the list to be empty.
0088   void Clear() { myNode.Nullify(); }
0089 
0090   //! Destructor
0091   ~TopLoc_SListOfItemLocation() { Clear(); }
0092 
0093   //! Returns the current value of the list. An error is
0094   //! raised  if the list is empty.
0095   Standard_EXPORT const TopLoc_ItemLocation& Value() const;
0096 
0097   //! Returns the current tail of  the list. On an empty
0098   //! list the tail is the list itself.
0099   Standard_EXPORT const TopLoc_SListOfItemLocation& Tail() const;
0100 
0101   //! Replaces the list by a list with <anItem> as Value
0102   //! and the  list <me> as  tail.
0103   void Construct(const TopLoc_ItemLocation& anItem)
0104   {
0105     Assign(TopLoc_SListOfItemLocation(anItem, *this));
0106   }
0107 
0108   //! Replaces the list <me> by its tail.
0109   void ToTail() { Assign(Tail()); }
0110 
0111   //! Returns True if the iterator  has a current value.
0112   //! This is !IsEmpty()
0113   Standard_Boolean More() const { return !IsEmpty(); }
0114 
0115   //! Moves the iterator to the next object in the list.
0116   //! If the iterator is empty it will  stay empty. This is ToTail()
0117   void Next() { ToTail(); }
0118 
0119 private:
0120   Handle(TopLoc_SListNodeOfItemLocation) myNode;
0121 };
0122 
0123 #endif // _TopLoc_SListOfItemLocation_HeaderFile