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65 lines
1.7 KiB
C++
Executable File
65 lines
1.7 KiB
C++
Executable File
//static const char* sccsid = "@(#)Expr_Sign.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
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// Copyright: Matra-Datavision 1991
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// File: Expr_Sign.cxx
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// Created: Tue May 28 12:54:14 1991
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// Author: Arnaud BOUZY
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// <adn>
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#include <Expr_Sign.ixx>
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#include <Expr_NumericValue.hxx>
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#include <Expr.hxx>
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Expr_Sign::Expr_Sign (const Handle(Expr_GeneralExpression)& exp)
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{
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CreateOperand(exp);
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}
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Handle(Expr_GeneralExpression) Expr_Sign::ShallowSimplified () const
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{
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Handle(Expr_GeneralExpression) op = Operand();
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if (op->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
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Handle(Expr_NumericValue) valop = Handle(Expr_NumericValue)::DownCast(op);
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return new Expr_NumericValue(Expr::Sign(valop->GetValue()));
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}
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Handle(Expr_Sign) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_Sign::Copy () const
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{
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return new Expr_Sign(Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_Sign::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (!Other->IsKind(STANDARD_TYPE(Expr_Sign))) {
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return Standard_False;
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}
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Handle(Expr_GeneralExpression) op = Operand();
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return op->IsIdentical(Other->SubExpression(1));
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}
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Standard_Boolean Expr_Sign::IsLinear () const
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{
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return !ContainsUnknowns();
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}
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Handle(Expr_GeneralExpression) Expr_Sign::Derivative (const Handle(Expr_NamedUnknown)& ) const
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{
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return new Expr_NumericValue(0.0);
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}
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Standard_Real Expr_Sign::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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Standard_Real res = Operand()->Evaluate(vars,vals);
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return Expr::Sign(res);
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}
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TCollection_AsciiString Expr_Sign::String() const
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{
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TCollection_AsciiString str("Sign(");
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str += Operand()->String();
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str += ")";
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return str;
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}
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