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120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
// Created on: 1991-01-10
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// Created by: Arnaud BOUZY
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// Copyright (c) 1991-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Expr_NamedConstant_HeaderFile
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#define _Expr_NamedConstant_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <Standard_Real.hxx>
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#include <Expr_NamedExpression.hxx>
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#include <Standard_Integer.hxx>
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#include <Standard_Boolean.hxx>
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#include <Expr_Array1OfNamedUnknown.hxx>
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#include <TColStd_Array1OfReal.hxx>
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class Standard_OutOfRange;
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class TCollection_AsciiString;
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class Expr_GeneralExpression;
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class Expr_NamedUnknown;
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class Expr_NamedConstant;
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DEFINE_STANDARD_HANDLE(Expr_NamedConstant, Expr_NamedExpression)
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//! Describes any numeric constant known by a special name
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//! (as PI, e,...).
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class Expr_NamedConstant : public Expr_NamedExpression
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{
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public:
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//! Creates a constant value of name <name> and value <value>.
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Standard_EXPORT Expr_NamedConstant(const TCollection_AsciiString& name, const Standard_Real value);
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Standard_Real GetValue() const;
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//! returns the number of sub-expressions contained
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//! in <me> (always returns zero)
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Standard_EXPORT Standard_Integer NbSubExpressions() const Standard_OVERRIDE;
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//! returns the <I>-th sub-expression of <me>
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//! raises OutOfRange
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Standard_EXPORT const Handle(Expr_GeneralExpression)& SubExpression (const Standard_Integer I) const Standard_OVERRIDE;
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//! returns a GeneralExpression after replacement of
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//! NamedUnknowns by an associated expression and after
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//! values computation.
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Standard_EXPORT Handle(Expr_GeneralExpression) Simplified() const Standard_OVERRIDE;
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//! Returns a GeneralExpression after a simplification
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//! of the arguments of <me>.
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Standard_EXPORT Handle(Expr_GeneralExpression) ShallowSimplified() const Standard_OVERRIDE;
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//! Returns a copy of <me> having the same unknowns and functions.
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Standard_EXPORT Handle(Expr_GeneralExpression) Copy() const Standard_OVERRIDE;
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//! Tests if <me> contains NamedUnknown.
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//! (returns always False)
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Standard_EXPORT Standard_Boolean ContainsUnknowns() const Standard_OVERRIDE;
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//! Tests if <exp> is contained in <me>.
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Standard_EXPORT Standard_Boolean Contains (const Handle(Expr_GeneralExpression)& exp) const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsLinear() const Standard_OVERRIDE;
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//! Returns the derivative on <X> unknown of <me>
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Standard_EXPORT Handle(Expr_GeneralExpression) Derivative (const Handle(Expr_NamedUnknown)& X) const Standard_OVERRIDE;
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//! Returns the <N>-th derivative on <X> unknown of <me>.
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//! Raises OutOfRange if <N> <= 0
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Standard_EXPORT virtual Handle(Expr_GeneralExpression) NDerivative (const Handle(Expr_NamedUnknown)& X, const Standard_Integer N) const Standard_OVERRIDE;
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//! Replaces all occurences of <var> with <with> in <me>
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Standard_EXPORT void Replace (const Handle(Expr_NamedUnknown)& var, const Handle(Expr_GeneralExpression)& with) Standard_OVERRIDE;
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//! Returns the value of <me> (as a Real) by
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//! replacement of <vars> by <vals>.
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Standard_EXPORT Standard_Real Evaluate (const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const Standard_OVERRIDE;
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DEFINE_STANDARD_RTTIEXT(Expr_NamedConstant,Expr_NamedExpression)
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protected:
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private:
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Standard_Real myValue;
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};
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#include <Expr_NamedConstant.lxx>
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#endif // _Expr_NamedConstant_HeaderFile
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