Re: [racket-users] Lost in ellipsis depths

Here's one more solution, using "template metafunctions" (inspired by Redex's metafunctions). And yes, most of the point of template metafunctions is to have something that cooperates with ellipses like you want. > (require syntax/parse syntax/parse/experimental/template

Re: [racket-users] Lost in ellipsis depths

Jens Axel Søgaard writes: > Here are two variations: ... Alexander D. Knauth writes: > To make it look a little less messy, here's what I would do for stuff like > this: ... Matthias Felleisen writes: > I think you want either this: ... Ryan Culpepper writes: > Here's one more

Re: [racket-users] Lost in ellipsis depths

I think you want either this: (syntax-parse #'(foo a b c) [(f:id s:id ...) (map (λ (s) (format-id #'f "foo-~a" s)) (syntax->list #'(s ...)))]) or that: (syntax-parse #'(foo a b c) [(f:id s:id ...) #'(list (format-id #'f "foo-~a" #'s) ...)]) On Sep 2, 2015, at 7:00 AM, Konrad Hinsen

Re: [racket-users] Lost in ellipsis depths

Here are two variations: #lang racket (require syntax/stx syntax/parse racket/syntax unstable/sequence) (syntax-parse #'(foo a b c) [(f:id s:id ...) (define foo-s* (stx-map (λ (x) (format-id #'f "foo-~a" x)) #'(s ...))) (with-syntax ([(foo-s ...) foo-s*]) #'(list foo-s ...))])

Re: [racket-users] Lost in ellipsis depths

> On Sep 2, 2015, at 7:09 AM, Konrad Hinsen wrote: > > Konrad Hinsen writes: > >> In fact, what I want is do something like map over the ellipsis pattern, >> but I haven't seen any example for doing this. > > Well, map actually works: > > (syntax-parse #'(foo a b