Thanks folks!
> On May 9, 2021, at 09:38, Robby Findler wrote:
>
>
> Here's one way to write it in modern Racket:
>
> #lang racket
> (require (for-syntax syntax/parse))
>
> (module+ test (require rackunit))
>
> (define-syntax (my-and stx)
> (syntax-parse stx
> [(_) #'#f]
> [(_ e:
Here's one way to write it in modern Racket:
#lang racket
(require (for-syntax syntax/parse))
(module+ test (require rackunit))
(define-syntax (my-and stx)
(syntax-parse stx
[(_) #'#f]
[(_ e:expr) #'e]
[(_ e1:expr e2:expr ...)
#'(if e1 (my-and e2 ...) #f)]))
(module+ test
(
Hi Tim,
In this case Ryan's method leads to:
https://github.com/racket/racket/blob/master/racket/collects/racket/private/qq-and-or.rkt#L440
But in case you are wondering about the style used in that file:
at the point where "qq-and-or.rkt" is used, none of the usual
syntax tools (such as syntax-
Here are the three most convenient ways I know of to find that information
(which is "$RACKET/collects/racket/private/qq-and-or.rkt" in this specific
case):
If you use DrRacket, then open a file that uses `and`, right-click on an
occurrence of `and`, and choose "Open Defining File" (which changes
Where in the repository are macros like "and" and "or" defined?
I tried searching for "and" and "or" ... but you probably know how that
worked out.
Thanks folks!
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