Convert DataItem to an Expression in ClassCondition #2005
Description
The field DataItem of ClassCondition is currently a StorageArea but it would mean that it should be compared in CheckEquivalence(), which is not the spirit of this method as it compares the operator of the expression.
A solution is to have DataItem as a ConditionalOperand, which is used to hold operands of ConditionalExpression (the parent class of ClassCondition).
As a result, we can have Exp0 "equivalent" to Exp1. But still have a mean to differentiate them
* Exp0
Var-txt2 IS NUMERIC
* Exp1
Var-txt IS NUMERIC