Woops. I was under the impression that #:auto worked like an optional argument. Is there any way to do optional constructor arguments with structs (I don't see one but I can hope...)?
On Tue, Jul 29, 2014 at 4:39 PM, J. Ian Johnson <[email protected]> wrote: > From the struct docs: > constructor-id (which defaults to id), a constructor procedure that takes > m arguments and returns a new instance of the structure type, where m is > the number of fields that do not include an #:auto option. > > You don't give anything to the constructor for #:auto fields. > -Ian > ----- Original Message ----- > From: "Spencer Florence" <[email protected]> > To: "racket" <[email protected]> > Sent: Tuesday, July 29, 2014 5:32:46 PM GMT -05:00 US/Canada Eastern > Subject: [racket] Shared and structs with #:auto > > > > Hi all, > > I'm trying to use shared with a structure that has a field with #:auto > > If I have some structure like this: > > > (struct test ([a #:auto]) #:transparent #:mutable) > > > > this works fine: > > > (shared ([b (test)]) b) > > > but this errors: > > > (shared ([b (test 1)]) b) > > with "shared: wrong argument count for structure constructor; expected 0, > found 1 in: (test1 1)" > > > Is this a bug? Is there a work around? > > --Spencer > ____________________ > Racket Users list: > http://lists.racket-lang.org/users >
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