1 // Created on: 1997-12-16
2 // Created by: Denis PASCAL
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _TDataStd_Expression_HeaderFile
18 #define _TDataStd_Expression_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_Type.hxx>
23 #include <TCollection_ExtendedString.hxx>
24 #include <TDF_AttributeList.hxx>
25 #include <TDF_Attribute.hxx>
26 #include <Standard_OStream.hxx>
29 class TCollection_ExtendedString;
31 class TDF_RelocationTable;
34 class TDataStd_Expression;
35 DEFINE_STANDARD_HANDLE(TDataStd_Expression, TDF_Attribute)
37 //! Expression attribute.
38 //! ====================
40 //! * Data Structure of the Expression is stored in a
41 //! string and references to variables used by the string
43 //! Warning: To be consistent, each Variable referenced by the
44 //! expression must have its equivalent in the string
45 class TDataStd_Expression : public TDF_Attribute
53 Standard_EXPORT static const Standard_GUID& GetID();
55 //! Find, or create, an Expression attribute.
58 Standard_EXPORT static Handle(TDataStd_Expression) Set (const TDF_Label& label);
60 Standard_EXPORT TDataStd_Expression();
62 //! build and return the expression name
63 Standard_EXPORT TCollection_ExtendedString Name() const;
65 Standard_EXPORT void SetExpression (const TCollection_ExtendedString& E);
67 Standard_EXPORT const TCollection_ExtendedString& GetExpression() const;
69 Standard_EXPORT TDF_AttributeList& GetVariables();
71 Standard_EXPORT const Standard_GUID& ID() const Standard_OVERRIDE;
73 Standard_EXPORT void Restore (const Handle(TDF_Attribute)& With) Standard_OVERRIDE;
75 Standard_EXPORT Handle(TDF_Attribute) NewEmpty() const Standard_OVERRIDE;
77 Standard_EXPORT void Paste (const Handle(TDF_Attribute)& Into, const Handle(TDF_RelocationTable)& RT) const Standard_OVERRIDE;
79 Standard_EXPORT virtual Standard_OStream& Dump (Standard_OStream& anOS) const Standard_OVERRIDE;
84 DEFINE_STANDARD_RTTI(TDataStd_Expression,TDF_Attribute)
94 TCollection_ExtendedString myExpression;
95 TDF_AttributeList myVariables;
106 #endif // _TDataStd_Expression_HeaderFile