[plt-scheme] 3D boxes and macros

From: Jens Axel Søgaard (jensaxel at soegaard.net)
Date: Tue Jul 19 18:43:42 EDT 2005

Arjun Guha wrote:
> I have a box defined in the transformer environment, that I insert into 
> the syntax.  I'd expect that the set-box! would first mutate the 
> contents to 'outer-value, followed by the call to unbox.  

Is this what you want?

(module box-and-macro mzscheme

   (define-for-syntax the-box (box 'initial))

   (define-syntax (my-macro stx)
     (syntax-case stx ()
              (set-box! the-box 'value))
            (if (eq? (unbox #,the-box) 'value)

Jens Axel Søgaard

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