[gambit-list] macro problems
Adrien Piérard
pierarda at iro.umontreal.ca
Thu Aug 13 06:27:37 EDT 2009
2009/8/13 lowly coder <lowlycoder at huoyanjinjing.com>:
> The following confuses me even more:
You are mixing environments…
> (define-macro (test)
> (define bar 3)
Bar is defined in the body of the macro
> (pp (eval '(+ 1 2)))
No bindings here, no problem
> (pp bar)
This is bound to 3
> (pp (eval 'bar)))
This bar is in another world.
Try to add the second parameter to eval (the environment), just to be sure
> (test)
fail.
In other words, look at that
(define-macro (foo)
(define bar 3)
(eval '(define bar "hi"))
(pp bar)
(eval '(pp bar)))
(foo)
See the point?
P!
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