include/opencascade/Expr_RelationIterator.hxx

0001 // Created on: 1991-01-14
0002 // Created by: Arnaud BOUZY
0003 // Copyright (c) 1991-1999 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 _Expr_RelationIterator_HeaderFile
0018 #define _Expr_RelationIterator_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Expr_Array1OfSingleRelation.hxx>
0025 #include <Standard_Integer.hxx>
0026 #include <Standard_Boolean.hxx>
0027 class Expr_GeneralRelation;
0028 class Expr_SingleRelation;
0029
0030 //! Iterates on every basic relation contained in
0031 //! a GeneralRelation.
0032 class Expr_RelationIterator
0033 {
0034 public:
0035   DEFINE_STANDARD_ALLOC
0036
0037   Standard_EXPORT Expr_RelationIterator(const Handle(Expr_GeneralRelation)& rel);
0038
0039   //! Returns False if no other relation remains.
0040   Standard_EXPORT Standard_Boolean More() const;
0041
0042   Standard_EXPORT void Next();
0043
0044   //! Returns current basic relation.
0045   //! Exception is raised if no more relation remains.
0046   Standard_EXPORT Handle(Expr_SingleRelation) Value() const;
0047
0048 protected:
0049 private:
0050   Expr_Array1OfSingleRelation myRelation;
0051   Standard_Integer            current;
0052 };
0053
0054 #endif // _Expr_RelationIterator_HeaderFile