[m-dev.] syntactic suggar suggestion for state variables

[Ben Schmidt]

> The `ui, uo' modes would not typically be useful.

Yes, I understand that, and agree. But I don't think there's any denying 
they are the unique equivalents of in and out modes. Maybe I'm just 
closed minded, but it seems to me that as in/out mode state variables 
tend to accumulate, whereas di/uo ones tend to update/mutate, they are 
fundamentally different approaches which happen to both be convenient as 
representations of states.

Still...my mind is ticking over how it might be done. Not getting very 
far though, and must continue real work!

At any rate, I'd still vote for adding the sugar now and redoing the 
mode system later!

Ben.


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