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> From: Michael Sperber <sperber@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Tom> Every function should take an extra parameter which
Tom> represents the particular Scheme instance under
Tom> consideration. I might be running two different Scheme
Tom> worlds in one process.
> Can't you handle this implicitly? Or do you need to switch
> between instances along a single call chain?
I'd prefer to be able to mix them, for example to be able to write
primitives which perform communication between them.
I think of them as comparable to the DISPLAY* parameters in Xlib.
It is a trade-off, I admit, between register pressure and fast/easy
access to instance-specific state.
-t