On Jul 12, 2014, at 10:17 PM, Alexander D. Knauth <alexan...@knauth.org> wrote:
> > On Jul 12, 2014, at 6:43 PM, Brian Adkins <racketus...@lojic.com> wrote: > >> I probably won't keep my defpat macro, at least not in its present form (for >> one, it only handles a single arg); there's probably a balance between being >> concise and being general/flexible. > > Although define/match is definitely more powerful, if you want it, this would > probably be a good version of what you want that would handle multiple > arguments: (I’ll reply again if I get one to work with optional and/or > keyword-arguments) > (define-syntax defpat > (syntax-rules () > [(defpat (f arg-pat ...) body ...) > (defpat f (match-lambda** [(arg-pat ...) body ...]))] > [(defpat id expr) > (define id expr)])) Ok I just made a version of defpat that can handle multiple arguments, optional arguments, keyword-arguments, and optional keyword-arguments. I also made a form called my-match-lambda that defpat uses to do this. https://github.com/AlexKnauth/defpat Also to do this I had to make it so that you have to use square brackets to specify optional arguments, otherwise it couldn’t tell between an optional argument and a match pattern. ____________________ Racket Users list: http://lists.racket-lang.org/users
