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-- File: NamedConstant.cdl
-- Created: Thu Jan 10 12:07:34 1991
-- Author: Arnaud BOUZY
-- <adn@topsn3>
---Copyright: Matra Datavision 1991, 1992
class NamedConstant from Expr
inherits NamedExpression from Expr
---Purpose: Describes any numeric constant known by a special name
-- (as PI, e,...).
uses NamedUnknown from Expr,
GeneralExpression from Expr,
Array1OfNamedUnknown from Expr,
Array1OfReal from TColStd,
AsciiString from TCollection
raises OutOfRange from Standard
is
Create(name : AsciiString; value : Real)
---Purpose: Creates a constant value of name <name> and value <value>.
returns mutable NamedConstant;
GetValue(me)
---C++: inline
returns Real
is static;
NbSubExpressions(me)
---Purpose: returns the number of sub-expressions contained
-- in <me> (always returns zero)
returns Integer
is static;
SubExpression(me; I : Integer)
---Purpose: returns the <I>-th sub-expression of <me>
-- raises OutOfRange
---C++: return const &
returns any GeneralExpression
raises OutOfRange
is static;
Simplified(me)
---Purpose: returns a GeneralExpression after replacement of
-- NamedUnknowns by an associated expression and after
-- values computation.
returns any GeneralExpression ;
ShallowSimplified(me)
---Purpose: Returns a GeneralExpression after a simplification
-- of the arguments of <me>.
returns any GeneralExpression;
Copy(me)
---Purpose: Returns a copy of <me> having the same unknowns and functions.
returns mutable like me;
ContainsUnknowns(me)
---Purpose: Tests if <me> contains NamedUnknown.
-- (returns always False)
returns Boolean;
Contains(me; exp : GeneralExpression)
---Purpose: Tests if <exp> is contained in <me>.
returns Boolean
is static;
IsLinear(me)
returns Boolean
is static;
Derivative(me; X : NamedUnknown)
---Purpose: Returns the derivative on <X> unknown of <me>
returns any GeneralExpression;
NDerivative(me; X : NamedUnknown; N : Integer)
---Purpose: Returns the <N>-th derivative on <X> unknown of <me>.
-- Raises OutOfRange if <N> <= 0
returns any GeneralExpression
raises OutOfRange
is redefined;
Replace(me : mutable ; var : NamedUnknown ; with : GeneralExpression);
---Purpose: Replaces all occurences of <var> with <with> in <me>
Evaluate(me; vars : Array1OfNamedUnknown; vals : Array1OfReal)
---Purpose: Returns the value of <me> (as a Real) by
-- replacement of <vars> by <vals>.
returns Real;
fields
myValue : Real;
end NamedConstant;
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