I don't see how that's even possible. To transform a let-keywords-style call like (foo 10 20 'baz 30) into (foo 10 20 :baz 30) or (foo 10 20 #:baz 30) or (foo 10 20 baz: 30) as the case may be, the call needs to be wrapped in a macro of some sort.

The reverse case is also problematic, though it may be fixable: if a procedure is defined with (define (foo one two . rest) (let-keywords ...)), it can expand into a CL-style keyword system, but not into a Racket/Kawa one as far as I can tell.

On Fri, Apr 24, 2020 at 11:07 AM Arthur A. Gleckler <xxxxxx@speechcode.com> wrote:

On Thu, Apr 23, 2020 at 11:39 PM Lassi Kortela <xxxxxx@lassi.io> wrote:

I'll include let-keywords in the next draft's rationale.

I'm wondering how hard it would be to implement let-keywords on top of all the other keywords systems instead, and what the tradeoffs would be. Speaking as a user, that would be nice to explore.