Custom type coercion function

[florence]

It would be nice to have a custom coertion/parsing function beyond the generic type based ones. Something like:

(define/provide-environment [id #:coerse my-parse])

This would allow types beyond the default ones supported.

[lexi-lambda]

Yes, this is semi-planned, I just don't know exactly how I want to do it yet. The solution you mentioned is definitely the simplest one, though.