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-- File: Sum.cdl
-- Created: Mon Jan 14 16:20:37 1991
-- Author: Arnaud BOUZY
-- <adn@topsn3>
---Copyright: Matra Datavision 1991
class Sum from Expr
inherits PolyExpression from Expr
uses GeneralExpression from Expr,
AsciiString from TCollection,
NamedUnknown from Expr,
Array1OfNamedUnknown from Expr,
Array1OfReal from TColStd,
SequenceOfGeneralExpression from Expr
raises OutOfRange from Standard,
NumericError from Standard,
NotEvaluable from Expr
is
Create(exps : SequenceOfGeneralExpression)
---Purpose: Creates the sum of all the members of sequence <exps>.
returns mutable Sum;
Create(exp1,exp2 : GeneralExpression)
---Purpose: Creates the sum of <exp1> and <exp2>.
returns mutable Sum;
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;
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;
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 Sum;
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