1 // Created on: 1991-01-10
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.
17 #ifndef _Expr_NamedConstant_HeaderFile
18 #define _Expr_NamedConstant_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_Type.hxx>
23 #include <Standard_Real.hxx>
24 #include <Expr_NamedExpression.hxx>
25 #include <Standard_Integer.hxx>
26 #include <Standard_Boolean.hxx>
27 #include <Expr_Array1OfNamedUnknown.hxx>
28 #include <TColStd_Array1OfReal.hxx>
29 class Standard_OutOfRange;
30 class TCollection_AsciiString;
31 class Expr_GeneralExpression;
32 class Expr_NamedUnknown;
35 class Expr_NamedConstant;
36 DEFINE_STANDARD_HANDLE(Expr_NamedConstant, Expr_NamedExpression)
38 //! Describes any numeric constant known by a special name
40 class Expr_NamedConstant : public Expr_NamedExpression
46 //! Creates a constant value of name <name> and value <value>.
47 Standard_EXPORT Expr_NamedConstant(const TCollection_AsciiString& name, const Standard_Real value);
49 Standard_Real GetValue() const;
51 //! returns the number of sub-expressions contained
52 //! in <me> (always returns zero)
53 Standard_EXPORT Standard_Integer NbSubExpressions() const Standard_OVERRIDE;
55 //! returns the <I>-th sub-expression of <me>
57 Standard_EXPORT const Handle(Expr_GeneralExpression)& SubExpression (const Standard_Integer I) const Standard_OVERRIDE;
59 //! returns a GeneralExpression after replacement of
60 //! NamedUnknowns by an associated expression and after
61 //! values computation.
62 Standard_EXPORT Handle(Expr_GeneralExpression) Simplified() const Standard_OVERRIDE;
64 //! Returns a GeneralExpression after a simplification
65 //! of the arguments of <me>.
66 Standard_EXPORT Handle(Expr_GeneralExpression) ShallowSimplified() const Standard_OVERRIDE;
68 //! Returns a copy of <me> having the same unknowns and functions.
69 Standard_EXPORT Handle(Expr_GeneralExpression) Copy() const Standard_OVERRIDE;
71 //! Tests if <me> contains NamedUnknown.
72 //! (returns always False)
73 Standard_EXPORT Standard_Boolean ContainsUnknowns() const Standard_OVERRIDE;
75 //! Tests if <exp> is contained in <me>.
76 Standard_EXPORT Standard_Boolean Contains (const Handle(Expr_GeneralExpression)& exp) const Standard_OVERRIDE;
78 Standard_EXPORT Standard_Boolean IsLinear() const Standard_OVERRIDE;
80 //! Returns the derivative on <X> unknown of <me>
81 Standard_EXPORT Handle(Expr_GeneralExpression) Derivative (const Handle(Expr_NamedUnknown)& X) const Standard_OVERRIDE;
83 //! Returns the <N>-th derivative on <X> unknown of <me>.
84 //! Raises OutOfRange if <N> <= 0
85 Standard_EXPORT virtual Handle(Expr_GeneralExpression) NDerivative (const Handle(Expr_NamedUnknown)& X, const Standard_Integer N) const Standard_OVERRIDE;
87 //! Replaces all occurences of <var> with <with> in <me>
88 Standard_EXPORT void Replace (const Handle(Expr_NamedUnknown)& var, const Handle(Expr_GeneralExpression)& with) Standard_OVERRIDE;
90 //! Returns the value of <me> (as a Real) by
91 //! replacement of <vars> by <vals>.
92 Standard_EXPORT Standard_Real Evaluate (const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const Standard_OVERRIDE;
97 DEFINE_STANDARD_RTTIEXT(Expr_NamedConstant,Expr_NamedExpression)
107 Standard_Real myValue;
113 #include <Expr_NamedConstant.lxx>
119 #endif // _Expr_NamedConstant_HeaderFile