[plt-scheme] A question on "expand"

--- Chris Wright <caw at cs.mu.oz.au> wrote:
> I'm currently in the middle of getting macros all
> wrong;)
> So, I'm trying to "see what they look like" by using
> "expand"

[snip]

(require (lib "defmacro.ss"))

(define-macro t
  (lambda (args)
    `(apply + ,args)))

(syntax-object->datum (expand-once '(t (1 2))))

> (apply + (1 2))

Notes:
- expand-once produces more readable output than
expand
- defmacros suck; syntax-rules/syntax-case don't.

(define-syntax t
  (syntax-rules ()
    ((t args) (apply + args))))

(syntax-object->datum (expand-once '(t (1 2))))

> (apply + (1 2))

HTH,
Noel

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