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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 0029 //! An SListOfItemLocation is a LISP like list of Items. 0030 //! An SListOfItemLocation is : 0031 //! . Empty. 0032 //! . Or it has a Value and a Tail which is an other SListOfItemLocation. 0033 //! 0034 //! The Tail of an empty list is an empty list. 0035 //! SListOfItemLocation are shared. It means that they can be 0036 //! modified through other lists. 0037 //! SListOfItemLocation may be used as Iterators. They have Next, 0038 //! More, and value methods. To iterate on the content 0039 //! of the list S just do. 0040 //! 0041 //! SListOfItemLocation Iterator; 0042 //! for (Iterator = S; Iterator.More(); Iterator.Next()) 0043 //! X = Iterator.Value(); 0044 class TopLoc_SListOfItemLocation 0045 { 0046 public: 0047 0048 DEFINE_STANDARD_ALLOC 0049 0050 //! Creates an empty List. 0051 TopLoc_SListOfItemLocation() {} 0052 0053 //! Creates a List with <anItem> as value and <aTail> as tail. 0054 Standard_EXPORT TopLoc_SListOfItemLocation(const TopLoc_ItemLocation& anItem, const TopLoc_SListOfItemLocation& aTail); 0055 0056 //! Creates a list from an other one. The lists are shared. 0057 TopLoc_SListOfItemLocation(const TopLoc_SListOfItemLocation& Other) 0058 : myNode(Other.myNode) 0059 { 0060 } 0061 0062 //! Sets a list from an other one. The lists are 0063 //! shared. The list itself is returned. 0064 Standard_EXPORT TopLoc_SListOfItemLocation& Assign (const TopLoc_SListOfItemLocation& Other); 0065 0066 //! Assignment 0067 TopLoc_SListOfItemLocation& operator = (const TopLoc_SListOfItemLocation& Other) 0068 { 0069 return Assign(Other); 0070 } 0071 0072 //! Move constructor 0073 TopLoc_SListOfItemLocation (TopLoc_SListOfItemLocation&& theOther) Standard_Noexcept 0074 : myNode(std::move (theOther.myNode)) 0075 { 0076 } 0077 0078 //! Move operator 0079 TopLoc_SListOfItemLocation& operator= (TopLoc_SListOfItemLocation&& theOther) Standard_Noexcept 0080 { 0081 myNode = std::move (theOther.myNode); 0082 return *this; 0083 } 0084 0085 //! Returne true if this list is empty 0086 Standard_Boolean IsEmpty() const 0087 { 0088 return myNode.IsNull(); 0089 } 0090 0091 //! Sets the list to be empty. 0092 void Clear() 0093 { 0094 myNode.Nullify(); 0095 } 0096 0097 //! Destructor 0098 ~TopLoc_SListOfItemLocation() 0099 { 0100 Clear(); 0101 } 0102 0103 //! Returns the current value of the list. An error is 0104 //! raised if the list is empty. 0105 Standard_EXPORT const TopLoc_ItemLocation& Value() const; 0106 0107 //! Returns the current tail of the list. On an empty 0108 //! list the tail is the list itself. 0109 Standard_EXPORT const TopLoc_SListOfItemLocation& Tail() const; 0110 0111 //! Replaces the list by a list with <anItem> as Value 0112 //! and the list <me> as tail. 0113 void Construct(const TopLoc_ItemLocation& anItem) 0114 { 0115 Assign(TopLoc_SListOfItemLocation(anItem, *this)); 0116 } 0117 0118 //! Replaces the list <me> by its tail. 0119 void ToTail() 0120 { 0121 Assign(Tail()); 0122 } 0123 0124 //! Returns True if the iterator has a current value. 0125 //! This is !IsEmpty() 0126 Standard_Boolean More() const 0127 { 0128 return !IsEmpty(); 0129 } 0130 0131 //! Moves the iterator to the next object in the list. 0132 //! If the iterator is empty it will stay empty. This is ToTail() 0133 void Next() 0134 { 0135 ToTail(); 0136 } 0137 0138 private: 0139 Handle(TopLoc_SListNodeOfItemLocation) myNode; 0140 }; 0141 0142 #endif // _TopLoc_SListOfItemLocation_HeaderFile
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