Sorawee answered your immediate question, but I figured I'd offer a pointer to Fear of Macros in case you haven't seen it: https://www.greghendershott.com/fear-of-macros/ It helped me a lot when I was trying to get my head around macros. Also, I got a lot of value from reading through the code of https://pkgs.racket-lang.org/package/struct-update
On Thu, Sep 16, 2021 at 4:21 PM Dimaugh Silvestris < dimaughsilvest...@gmail.com> wrote: > (sorry if I'm asking too many questions about macros lately, I'm learning > about them but I keep running into scenarios I can't find documentation for) > > I'm trying to capture the value of a variable whose identifier I can only > get with format-id, inside a with-syntax. > Something like this pseudocode (imagine name-foo contains a list of > symbols): > (define-syntax (my-macro stx) > (syntax-case stx () > ((_ name other-args ...) > (with-syntax* ((varname (format-id #'name "~a-foo" #'name)) > (varval (cons (datum->syntax #'varname) (datum->syntax > #'(other-args ...))))) > #'(define name (λ varval (print varval))))))) > > > Which of course doesn't work. I understand this might have to do with how > macros work at an earlier phase than runtime, so is it impossible? > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/CAN4YmRF%3Do3NsXOvK2fvUDeYL_jfA9r946%3D%3DguoGb_%3DKyS%3Dm%2Bxw%40mail.gmail.com > <https://groups.google.com/d/msgid/racket-users/CAN4YmRF%3Do3NsXOvK2fvUDeYL_jfA9r946%3D%3DguoGb_%3DKyS%3Dm%2Bxw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CAE8gKod53kD4ZFyxmatP4qx%2BvSKqrnT-if7PCD4MWxA7Tva3-Q%40mail.gmail.com.
