Re: Macro from list to class init

> On May 14, 2018, at 6:55 AM, Denis Michiels <[email protected]> wrote:
> 
> Hello,
> 
> I'm trying to build a macro to be able to do :
> 
> ```
> (define data (list (cons 'label "My button")
>                   (cons 'stretchable-width #t)))
> 
> (my-macro button% data)
> ```
> 
> to be translated in  :
> 
> ```
> (new button% [label "My button"] [stretchable-width #t])
> ```
> 
> (I take gui example, and incomplete (like no frame) but it is to show my
> goal)
> 
> Unfortunately, I didn't manage well macro in Racket...
> Can someone help me, or have a hint how to manage this macro?
>  

#lang racket/gui

(define data '((label "My button") (stretchable-width #t)))

(define-syntax (mk-but stx)
  (syntax-case stx ()
    [(_ data)
     #'(let ()
         (match-define (cons label others) data)
         (define button (make-object button% (second label) frame))
         (for ((o others))
           (match-define (list m val) o)
           (dynamic-send button m val)))]))


(define frame (new frame% [label "test"]))

(mk-but data)

(send frame show #t)

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