> The evaluate() function clearly requires keeping all in-scope 
> variables available

Well, that rather depends on who specifies it...

I've been thinking of an approach similar to prepared statements in SQL
where the variable parts of a dynamic expression have to be provided
explicitly as parameters, rather than allowing the dynamic expression to
pick up anything it likes from the context.

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 


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