> No Scheme uses option B.  In addition to the objections you raise,
> there is the fact that if cons is known to be bound to the usual value,
> "(cons (x))" can be rejected by a compiler under options A and C, but
> might be valid under option B.

From what I understand, no legal syntax maybe be rejected by the
compiler. The error must always be raised at runtime.

Maybe another exercise is to test say (cons 1) and (/ 1 0) or anything
else where the compiler could make such assumptions across the various
implementations.

Cheers

leppie

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