[r6rs-discuss] Proposed features for small Scheme, part 9: modules

[Brian Harvey]

> %bignums, %rationals, %ieee-float

As a programmer, I'd rather be able to say

	(if (defined? numerator) ...)

than drag in a special symbol %rational.  And the recent discussion of
bignums suggests to me that "has bignums" is not a yes-or-no question;
I really want to be able to say

	(if (exact? (string->number "1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000") ...)

or whatever range I actually need.