It appears ##structure-type is what I want. Anyone smarter than me want to either:
(1) confirm this is the right answer or (2) tell me why using ##structure-type for this purpose is a bad idea?
Thanks!
On Wed, May 27, 2009 at 1:44 PM, lowly coder lowlycoder@huoyanjinjing.comwrote:
Cool, thanks! Another quesiton on define-type -- is there anyway to get back an unique identifier for the type?
i.e. if I have:
(define f1 (make-foo ..)) (define f2 (make-foo ...))
(define b1 (make-bar ..)))
I want something so that
(equal? (type f1) (type f2)) and (not (equal? (type f1) (type b1)))
the idea is then, I can do dispatching on types i.e.
(define (draw object) ((lookup-in-hash-table (type object)) object))
Thanks!
On Wed, May 27, 2009 at 5:14 AM, David St-Hilaire < sthilaid@iro.umontreal.ca> wrote:
lowly coder wrote:
Hey,
Where is define-type documented? I can't find it in r5rs or in the gambit documentation (though it is briefly mentioned in a tour of scheme through gambit). define-type is really cool and I'm starting to run against my limited knowledge of it.
Hi there!
I've put some of Marc's undergrad notes related to define-type in the gambit-c wiki a while ago:
http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Define-type
Hope it can help!
David