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-- File: PolyExpression.cdl
-- Created: Thu Jan 10 14:28:48 1991
-- Author: Arnaud BOUZY
-- <adn@topsn3>
---Copyright: Matra Datavision 1991
deferred class PolyExpression from Expr
inherits GeneralExpression from Expr
uses SequenceOfGeneralExpression from Expr,
NamedUnknown from Expr
raises OutOfRange from Standard,
NumericError from Standard,
InvalidOperand from Expr
is
Initialize;
---Purpose: initialize an empty list of operands.
NbOperands(me)
---Purpose: returns the number of operands contained in <me>
---Level : Internal
returns Integer
is static;
Operand(me; index : Integer)
---Purpose: Returns the <index>-th operand used in <me>.
-- An exception is raised if index is out of range
---C++: inline
---C++: return const &
---Level : Internal
returns any GeneralExpression
raises OutOfRange
is static;
SetOperand(me : mutable; exp : GeneralExpression; index : Integer)
---Purpose: Sets the <index>-th operand used in <me>.
-- An exception is raised if <index> is out of range
-- Raises InvalidOperand if <exp> contains <me>.
---Level : Internal
raises OutOfRange,InvalidOperand
is static;
AddOperand(me : mutable; exp : GeneralExpression)
---Purpose: Adds an operand to the list of <me>.
---Level : Internal
is static protected;
RemoveOperand(me : mutable; index : Integer)
---Purpose: Remove the operand denoted by <index> from the list of
-- <me>.
-- Raises exception if <index> is out of range or if
-- removing operand intend to leave only one or no
-- operand.
---Level : Internal
raises OutOfRange
is static protected;
NbSubExpressions(me)
---Purpose: returns the number of sub-expressions contained
-- in <me> ( >= 2)
returns Integer
is static;
SubExpression(me; I : Integer)
---Purpose: Returns the sub-expression denoted by <I> in <me>
-- Raises OutOfRange if <I> > NbSubExpressions(me)
---C++: return const &
returns any GeneralExpression
raises OutOfRange
is static;
ContainsUnknowns(me)
---Purpose: Does <me> contains NamedUnknown ?
returns Boolean
is static;
Contains(me; exp : GeneralExpression)
---Purpose: Tests if <exp> is contained in <me>.
returns Boolean
is static;
Replace(me : mutable ; var : NamedUnknown ; with : GeneralExpression)
---Purpose: Replaces all occurences of <var> with <with> in <me>
-- Raises InvalidOperand if <with> contains <me>.
raises InvalidOperand
is static;
Simplified(me)
---Purpose: Returns a GeneralExpression after replacement of
-- NamedUnknowns by an associated expression and after
-- values computation.
returns any GeneralExpression
raises NumericError;
fields
myOperands : SequenceOfGeneralExpression;
end PolyExpression;
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