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-- File: Absolute.cdl
-- Created: Mon Jan 14 16:14:52 1991
-- Author: Arnaud BOUZY
-- <adn@topsn3>
---Copyright: Matra Datavision 1991
class Absolute from Expr
inherits UnaryExpression from Expr
uses GeneralExpression from Expr,
Array1OfNamedUnknown from Expr,
Array1OfReal from TColStd,
AsciiString from TCollection,
NamedUnknown from Expr
raises NumericError from Standard,
NotEvaluable from Expr
is
Create(exp : GeneralExpression)
---Purpose: Creates the Abs of <exp>
returns mutable Absolute;
ShallowSimplified(me)
---Purpose: Returns a GeneralExpression after a simplification
-- of the arguments of <me>.
returns any GeneralExpression
raises NumericError;
Copy(me)
---Purpose: Returns a copy of <me> having the same unknowns and functions.
returns mutable like me;
IsIdentical(me; Other : GeneralExpression)
---Purpose: Tests if <me> and <Other> define the same expression.
-- This method does not include any simplification before
-- testing.
returns Boolean;
IsLinear(me)
returns Boolean;
Derivative(me; X : NamedUnknown)
---Purpose: Returns the derivative on <X> unknown of <me>
returns any GeneralExpression;
Evaluate(me; vars : Array1OfNamedUnknown; vals : Array1OfReal)
---Purpose: Returns the value of <me> (as a Real) by
-- replacement of <vars> by <vals>.
-- Raises NotEvaluable if <me> contains NamedUnknown not
-- in <vars> or NumericError if result cannot be computed.
returns Real
raises NotEvaluable,NumericError;
String(me)
---Purpose: returns a string representing <me> in a readable way.
returns AsciiString;
end Absolute;
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