I've just published draft #10 of SRFI 224. It was submitted by Wolfgang Corcoran-Mathe, author of the SRFI.

Since we've extended the last-call period so many times, I'm not going to set a date this time.  Still, please send feedback as soon as you can.

Here are Wolfgang's comments on the draft:

This draft respecifies all of the forms which used Maybe as continuation-passing procedures. This removes the SRFI's dependency on SRFI 189, and likely decreases its overall level of idiosyncracy.

fxmapping-map-either has been removed. More thought is needed on this procedure, which seemed half-baked and arbitrarily limited to accumulating results into two fxmappings.

Here is the commit summary:

• Implementation: Make CPS -ref procedure primitive.
• Tune fxmapping-contains? internal function slightly.
• Tune fxmapping-ref/default.
• Update implementation README.
• Fix typo.
• Unfolds can take multiple seeds.
• Remove lookup and query functions.
• Replace unfold-maybe with accumulate.
• Respecify pop-min/-max without Maybe.
• Fix typos reported by the W3C validator.
• Implementation: fxmapping-accumulate.
• Reimplement pop-min/-max.
• Minor style fix.
• Respecify -update forms.
• Respecify fxmapping-alter.
• Remove SRFI 189 and Maybe/Either references.
• fxmapping-map-either becomes fxmapping-partition-map.
• fxmapping-unfold: No varying numbers of seeds.
• Remove fxmapping-partition-map.
• fxmapping-update, etc.: Switch order of replace/delete arguments.
• Update implementation to current spec, with a few TODOs.
• Update tests.
• Implement correct semantics for update and alter.
• Grammar fix.
• Note fixnum range and portability expectations.
• Tests for update/alter returning additional values.
• Update implementation README.
• Publish tenth draft.

Here's the diff:

https://github.com/scheme-requests-for-implementation/srfi-224/compare/draft-9..draft-10

Regards,


SRFI Editor