Re: [racket-users] Re: syntax expands to define syntax, problems with ...

[Dan Liebgold]

On Wednesday, March 15, 2017 at 9:36:19 AM UTC-7, Sam Tobin-Hochstadt wrote:
> You need to escape the ... with another ..., like this:
> 

That's what I forgot.  Is there any other case where things are escaped in this 
manner?  It's a little surprising...

Thanks,
Dan

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Re: [racket-users] Re: syntax expands to define syntax, problems with ...

[Stephen Chang]

The inner ellipses need to be "escaped". I like using the dot notation
in nested macros but I know others do not like that style.

(define-syntax (test stx)
  (syntax-case stx ()
((_ n e ...)

 #'(define-syntax (n stx)
 (syntax-case stx ()
   ((_ e0 (... ...))
#'(n (e ...) e0 (... ...))
))

On Wed, Mar 15, 2017 at 12:33 PM, Dan Liebgold
 wrote:
> Here's what works, not using the inner ellipses:
>
> http://pasterack.org/pastes/34338
>
> But I'd prefer to use the ellipses..
>
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[racket-users] Re: syntax expands to define syntax, problems with ...

[Dan Liebgold]

Here's what works, not using the inner ellipses:

http://pasterack.org/pastes/34338

But I'd prefer to use the ellipses..

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[racket-users] Re: syntax expands to define syntax, problems with ...

[Dan Liebgold]

Oops, try this link instead (that one had simple mistakes):

http://pasterack.org/pastes/68032

On Wednesday, March 15, 2017 at 9:22:24 AM UTC-7, Dan Liebgold wrote:
> I feel like I'm forgetting something basic, but how can I have a syntax 
> transformer expand to a define-syntax, both using ellipses?
> 
> http://pasterack.org/pastes/27441
> 
> pasterack doesn't seem to return the error, which is
> 
>   syntax: no pattern variables before ellipsis in template in: ...
> 
> at the second "...".
> 
> Thanks,
> Dan

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