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141 lines
4.9 KiB
C++
141 lines
4.9 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_GeneralExpression_HeaderFile
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#define _Expr_GeneralExpression_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <MMgt_TShared.hxx>
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#include <Standard_Integer.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Real.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 Standard_NumericError;
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class Expr_NotEvaluable;
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class Expr_InvalidOperand;
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class Expr_NamedUnknown;
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class TCollection_AsciiString;
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class Expr_GeneralExpression;
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DEFINE_STANDARD_HANDLE(Expr_GeneralExpression, MMgt_TShared)
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//! Defines the general purposes of any expression.
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class Expr_GeneralExpression : public MMgt_TShared
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{
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public:
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//! Returns the number of sub-expressions contained
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//! in <me> ( >= 0)
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Standard_EXPORT virtual Standard_Integer NbSubExpressions() const = 0;
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//! Returns the <I>-th sub-expression of <me>
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//! raises OutOfRange if <I> > NbSubExpressions(me)
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Standard_EXPORT virtual const Handle(Expr_GeneralExpression)& SubExpression (const Standard_Integer I) const = 0;
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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 virtual Handle(Expr_GeneralExpression) Simplified() const = 0;
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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 virtual Handle(Expr_GeneralExpression) ShallowSimplified() const = 0;
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//! Returns a copy of <me> having the same unknowns and
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//! functions.
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Standard_EXPORT virtual Handle(Expr_GeneralExpression) Copy() const = 0;
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//! Tests if <me> contains NamedUnknowns.
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Standard_EXPORT virtual Standard_Boolean ContainsUnknowns() const = 0;
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//! Tests if <exp> is contained in <me>.
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Standard_EXPORT virtual Standard_Boolean Contains (const Handle(Expr_GeneralExpression)& exp) const = 0;
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//! Tests if <me> is linear on every NamedUnknown it
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//! contains.
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Standard_EXPORT virtual Standard_Boolean IsLinear() const = 0;
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//! Tests if <me> can be shared by one or more expressions
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//! or must be copied. This method returns False as a
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//! default value. To be redefined ( especially for
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//! NamedUnknown).
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Standard_EXPORT virtual Standard_Boolean IsShareable() const;
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//! Tests if <me> and <Other> define the same expression.
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//! Warning: This method does not include any simplification before
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//! testing. It could also be very slow; to be used
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//! carefully.
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Standard_EXPORT virtual Standard_Boolean IsIdentical (const Handle(Expr_GeneralExpression)& Other) const = 0;
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//! Returns the derivative on <X> unknown of <me>
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Standard_EXPORT virtual Handle(Expr_GeneralExpression) Derivative (const Handle(Expr_NamedUnknown)& X) const = 0;
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//! Returns the <N>-th derivative on <X> unknown of <me>.
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//! Raise 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;
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//! Replaces all occurences of <var> with copies of <with>
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//! in <me>. Copies of <with> are made with the Copy() method.
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//! Raises InvalidOperand if <with> contains <me>.
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Standard_EXPORT virtual void Replace (const Handle(Expr_NamedUnknown)& var, const Handle(Expr_GeneralExpression)& with) = 0;
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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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//! Raises NotEvaluable if <me> contains NamedUnknown not
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//! in <vars> or NumericError if result cannot be computed.
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Standard_EXPORT virtual Standard_Real Evaluate (const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const = 0;
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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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//! Raises NotEvaluable if <me> contains NamedUnknown not
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//! in <vars> or NumericError if result cannot be computed.
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Standard_EXPORT Standard_Real EvaluateNumeric() const;
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//! returns a string representing <me> in a readable way.
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Standard_EXPORT virtual TCollection_AsciiString String() const = 0;
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DEFINE_STANDARD_RTTIEXT(Expr_GeneralExpression,MMgt_TShared)
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protected:
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private:
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};
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#endif // _Expr_GeneralExpression_HeaderFile
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