[gambit-list] macro/function interaction
longster at gmail.com
Sat Jan 24 23:07:51 EST 2009
Essentially, you're calling `foo' during the macro expansion phase.
Are you sure you didn't what the macro to *expand* to (foo x)
instead? This would work:
(define (foo x) (+ x 1))
(define-macro (bar x) `(foo ,x))
Otherwise, if you really are asking about the difference between
expansion and runtime phases, see the two links Bill Six sent.
On Jan 24, 2009, at 9:42 PM, symbolic expression wrote:
> (define (foo x) (+ x 1))
> (define-macro (bar x) (foo x))
> (bar 10)
> this baffles me, if I open up gsi and paste this into the
> interpreter, I get 11
> however, if I stuff this in test.scm and run "gsi test.scm" I get:
> *** ERROR IN #<procedure #2>, "test.scm"@2.24 -- Unbound variable: foo
> what's going on? how do I fix this?
> [I would prefer that code in "gsi test.scm" has the same effect as
> if I type it into the interpreter]
> thanks in advance!
> -- symbolic expression
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