thanks! this is all much clearer now :-)
On Sun, Jan 25, 2009 at 11:39 AM, Marc Feeley feeley@iro.umontreal.cawrote:
On 24-Jan-09, 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?
You are confusing the expansion time world and the run time world. Check out the links Bill Six sent.
[I would prefer that code in "gsi test.scm" has the same effect as if I type it into the interpreter]
If that is really what you want you can replace
% gsi test.scm
by
% gsi -e '(for-each eval (read-all (open-input-file "test.scm")))'
or do that in a source file.
Finally, you can always define foo locally to bar:
(define-macro (bar x) (define (foo x) (+ x 1)) (foo x))
(bar 10)
or put foo's definition in a file (say foo.scm) and then:
(define-macro (bar x) (include "foo.scm") (foo x))
(bar 10)
Marc