[racket] Help With a Macro (tricky?)

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On 13-01-12 11:37, Marijn wrote:

> (define-syntax fast-class (lambda (stx) (syntax-case stx () ((_
> _field_ ...) (with-syntax (((_getter_ ...) (datum->syntax #f (map 
> (lambda (f) (string->symbol (string-append "get-" (symbol->string
> f)))) (syntax->datum #'(_field_ ...)) )) )) #'(class object% 
> (super-new) (init-field _field_ ...) (define/public (_getter_)
> _field_) ...) )))))
> 
> (define fast-class1% (fast-class size weight))
> 
> (define fast1 (new fast-class1% (size 2) (weight 200))) (send fast1
> get-size) (send fast1 get-weight)

I forgot to point out that you now basically have a struct with clunky
method access; so only use this for educational purposes, for real
code use a real struct.

Marijn
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