On Fri, Oct 28, 2016 at 3:18 PM, David Storrs <david.sto...@gmail.com> 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 several times, but I didn't
see suggestions for a convenient replacement. I often have something
like this:
#lang at-exp racket
(define px (compose pregexp string-append)) ; <--- like this
(define a "this")
@px{^@a} ; works fine, and looks like a variant of #px"..."
[[ You can also do this for a one-time-use:
@(compose pregexp string-append){^@a}
but that's almost as bad as one of
@pregexp{@string-append{^@a}}
@pregexp[@string-append{^@a}]
(pregexp @string-append{^@a})
]]
--
((x=>x(x))(x=>x(x))) Eli Barzilay:
http://barzilay.org/ Maze is Life!
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