On Fri, Oct 28, 2016 at 3:18 PM, David Storrs wrote:
> tl;dr : Why is the following an error?
>
> #lang at-exp racket
> (define a "this")
> @pregexp{^@a} ;; Should produce #px"^this" but errors out
> @pregexp{@(~a "^" a)} ;; This works but is clumsy
I see that the problem was pointed to you se
To understand what's going on, consider the following program:
#lang at-exp racket
(define a "this")
(define (f . l)
(for-each displayln l))
@f{^@a}
which prints
^
this
What's going on is that the `{}` in at-exp notation will evaluate to a
list of strings. One fo
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