I've updated the docs.
On Fri, May 15, 2020 at 10:33 AM Hendrik Boom wrote:
>
> On Fri, May 15, 2020 at 10:07:31AM -0400, Sam Tobin-Hochstadt wrote:
> > Generics are not supported yet; you need to use structure type
> > properties, like this:
> >
> > #lang typed/racket/base
> >
> > (: parameter-print : Any Output-Port Any -> Any)
> > (define (parameter-print v p b) (fprintf p "hi\n"))
> >
> > (struct parameter
> > ([type : String] [name : Symbol] [len : (Option String)] [const? :
> > Boolean] [stars : Integer])
> > #:property prop:custom-write parameter-print)
>
> Thank you. That worked.
>
> But according to section 2.5 of the typed Racket reference, #:property
> is not one of the allowed options in struct.
>
> Perhaps the documentation needs to be updated/
>
> -- hendrik
>
> >
> > On Fri, May 15, 2020 at 8:00 AM Hendrik Boom wrote:
> > >
> > > How does one provide a method to print strutures in typed Racket?
> > >
> > > (struct parameter
> > >
> > > ([type : XML] [name : Symbol] [len : (Option String)] [const? :
> > > Boolean] [stars : Integer])
> > > #:methods gen:custom-write [(define write-proc parameter-print)]
> > > )
> > >
> > > seems not to work. But something like this did work in untyped Racket.
> > > Is there some other way to do this?
> > >
> > > -- hendrik
> > >
> > > --
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> >
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