Re: SICP stream question

[Michael Livshin]

Chris Baker <address@hidden> writes:

> Is define-macro portable across the various scheme implementations?

no less portable than procedure->macro . ;)

> The only thing I could find in r5rs was define-syntax, which I
> couldn't get to work.

(use-syntax (ice-9 syncase))  ; this is currently needed for R5RS
                              ; macros to work in Guile

(define-syntax cons-stream
  (syntax-rules ()
    ((_ ?car ?cdr) (cons ?car (delay ?cdr)))))

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                                        -- Klingon Programmer