parse-number-range
parse-number-range parses loop's convenient "for-as-arithmetic" syntax into 5 simple values. The values are from, to, limit-kind (:inclusive, :exclusive or nil if unbounded), by (step) and direction (+ or -)). Further related utilities are provided. Intended for easy implementation of analogous functionality in other constructs.

See the project's home for all details.


metaprogramming, Public Domain