I think I had a similar sort of problem about a year ago (I was at either
RacketCon or a Hackathon that same weekend and Mathew Flatt figured it out),
and the solution was changing (only-in path a) to (only-in path [a a]).
#lang racket/load
;;provider
(module T racket
(provide a)
(define a 1))
;; requirer
(module R racket
(require (for-syntax syntax/parse))
(define-syntax (test-binding stx)
(syntax-parse stx
[(_ path)
#'(let () (local-require (only-in path [a a])) a)]))
(test-binding 'T))
;; go
(require ‘R)
On Nov 6, 2014, at 4:09 PM, Spencer Florence <spen...@florence.io> wrote:
> Hi All,
>
> I've been struggling to have a macro be given a path then require something
> from that path. The following code produces and "Unbound Identifier" error,
> although I would expect it to evaluate to 1. Could someone provide insight
> into what is going on?
>
> #lang racket/load
> ;;provider
> (module T racket
> (provide a)
> (define a 1))
> ;; requirer
> (module R racket
> (require (for-syntax syntax/parse))
> (define-syntax (test-binding stx)
> (syntax-parse stx
> [(_ path)
> #'(let () (local-require (only-in path a)) a)]))
> (test-binding 'T))
> ;; go
> (require 'R)
>
>
> P.S. I attempted to do this with `dynamic-require,` but that failed because
> in my actual program `path` is sometimes `(submod "..")`, which caused an
> error about not having a base path.
>
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