variables appropriately. This caused us grief in 1971 before the Scheme-led
move to lexicals, when all variables were in effect special. It made the
creation of continuations expensive. I would be interested to discover how
current Lisp implemenations would treat this issue.
I think in fact that the capability is actually available to the (mostly
European) users of Poplog Common Lisp, via. the call pop11::consprocto