1 // Created on: 1991-04-16
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.
19 #include <Expr_GeneralExpression.hxx>
20 #include <Expr_NamedUnknown.hxx>
21 #include <Expr_NotEvaluable.hxx>
22 #include <Expr_NumericValue.hxx>
23 #include <Expr_Operators.hxx>
24 #include <Expr_UnaryMinus.hxx>
25 #include <Standard_NumericError.hxx>
26 #include <Standard_OutOfRange.hxx>
27 #include <Standard_Type.hxx>
28 #include <TCollection_AsciiString.hxx>
30 IMPLEMENT_STANDARD_RTTIEXT(Expr_UnaryMinus,Expr_UnaryExpression)
32 Expr_UnaryMinus::Expr_UnaryMinus(const Handle(Expr_GeneralExpression)& exp)
37 Handle(Expr_GeneralExpression) Expr_UnaryMinus::ShallowSimplified () const
39 Handle(Expr_GeneralExpression) myexp = Operand();
40 if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
41 Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp);
42 return new Expr_NumericValue(-myNVexp->GetValue());
44 if (myexp->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) {
45 return myexp->SubExpression(1);
47 Handle(Expr_UnaryMinus) me = this;
51 Handle(Expr_GeneralExpression) Expr_UnaryMinus::Copy () const
53 return -(Expr::CopyShare(Operand()));
56 Standard_Boolean Expr_UnaryMinus::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
58 if (Other->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) {
59 Handle(Expr_GeneralExpression) myexp = Operand();
60 return myexp->IsIdentical(Other->SubExpression(1));
62 return Standard_False;
65 Standard_Boolean Expr_UnaryMinus::IsLinear () const
67 Handle(Expr_GeneralExpression) myexp = Operand();
68 return myexp->IsLinear();
71 Handle(Expr_GeneralExpression) Expr_UnaryMinus::Derivative (const Handle(Expr_NamedUnknown)& X) const
73 Handle(Expr_GeneralExpression) myder = Operand();
74 myder = myder->Derivative(X);
75 Handle(Expr_UnaryMinus) resu = - myder;
76 return resu->ShallowSimplified();
79 Handle(Expr_GeneralExpression) Expr_UnaryMinus::NDerivative (const Handle(Expr_NamedUnknown)& X, const Standard_Integer N) const
82 throw Standard_OutOfRange();
84 Handle(Expr_GeneralExpression) myder = Operand();
85 myder = myder->NDerivative(X,N);
86 Handle(Expr_UnaryMinus) resu = - myder;
87 return resu->ShallowSimplified();
90 Standard_Real Expr_UnaryMinus::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
92 return - Operand()->Evaluate(vars,vals);
95 TCollection_AsciiString Expr_UnaryMinus::String() const
97 TCollection_AsciiString str;
98 Handle(Expr_GeneralExpression) op = Operand();
99 if (op->NbSubExpressions() > 1) {