1 // Created on: 1991-09-20
2 // Created by: Arnaud BOUZY
3 // Copyright (c) 1991-1999 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.
18 #include <Expr_NamedUnknown.hxx>
19 #include <Expr_GeneralExpression.hxx>
20 #include <Expr_GeneralRelation.hxx>
21 #include <Expr_UnknownIterator.hxx>
22 #include <Expr_RUIterator.hxx>
24 Handle(Expr_GeneralExpression) Expr::CopyShare(const Handle(Expr_GeneralExpression)& exp)
26 if (exp->IsShareable()) {
32 Standard_Integer Expr::NbOfFreeVariables(const Handle(Expr_GeneralRelation)& rel)
34 Standard_Integer nbvar = 0;
35 Expr_RUIterator rit(rel);
37 if (!rit.Value()->IsAssigned()) {
45 Standard_Integer Expr::NbOfFreeVariables(const Handle(Expr_GeneralExpression)& exp)
47 Standard_Integer nbvar = 0;
48 Expr_UnknownIterator uit(exp);
50 if (!uit.Value()->IsAssigned()) {
58 Standard_Real Expr::Sign(const Standard_Real val)
60 return ::Sign(1.0,val);