1. Thank you! 2. This works. Hooray. 3. I don't understand why it works. Boo.
My reasoning: In def.rkt, `define-foo' generates syntax. The syntax is a procedure definition. The body of the defined procedure needs to use a function from another module (in this case net/uri-codec). When Racket is compiling use.rkt, it substitutes `(define-foo)' with the syntax from def.rkt. However, if that new syntax doesn't include a `(require net/uri-codec)', how the heck does net/uri-codec get required into use.rkt? On Fri, Oct 19, 2012 at 7:15 PM, Danny Yoo <[email protected]> wrote: > On Fri, Oct 19, 2012 at 9:04 AM, Greg Hendershott > <[email protected]> wrote: >> I need to fix a bug, https://github.com/greghendershott/gapi/issues/2 . >> >> I've distilled to a simple case that exhibits the behavior: >> >> ;; def.rkt >> #lang racket >> (provide define-foo) >> (define-syntax define-foo >> (lambda (stx) >> #`(begin >> (require net/uri-codec) >> (define (#,(datum->syntax stx 'foo)) >> (alist->form-urlencoded '([a . "1"])))))) > > > > The macro's outputted code appears to require net/uri-codec. But > rather that require be part of the macro's output, you probably should > just modify def.rkt so that it requires net/uri-codec directly. > > Basically, change def.rkt and lift the require up: > > ;;;;;;;;;;;;;;;;;;;;;;;; > #lang racket > (provide define-foo) > > (require net/uri-codec) > (define-syntax define-foo > (lambda (stx) > #`(define (#,(datum->syntax stx 'foo)) > (alist->form-urlencoded '([a . "1"]))))) > ;;;;;;;;;;;;;;;;;;;;;;;; ____________________ Racket Users list: http://lists.racket-lang.org/users
