It would be nice to be able to have the features of all 3 in a single
type.... in other words a memo-function whose stored keys you could
retrieve.
Doesn't this make the result dependent on order of execution?
Given the expression
f(1), f(2), keys(f#1), f(3), f(4)
are you expecting that keys(f#1) will return (1,2)? If so, that's certainly
non-deterministic.
Michael Kay
Saxonica
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