`(List* T)` is the same as `T`, just as `(list* x)` is the same as `x`
(whether `x` is a list or not).

  > (require typed/racket)
  > (list* 4 5 6)
  - : (List* Positive-Byte Positive-Byte Positive-Byte)
  '(4 5 . 6)
  > (list* 6)
  - : Integer [more precisely: Positive-Byte]
  6
  > (:type (List* String))
  String

Ryan


On Wed, Jun 3, 2020 at 9:49 PM Hendrik Boom <[email protected]> wrote:

> On Wed, Jun 03, 2020 at 04:22:41PM +0100, Stephen De Gabrielle wrote:
> > Hi Hendrik,
> >
> > I can't see the example you mention in
> >
> https://docs.racket-lang.org/ts-reference/type-ref.html#%28form._%28%28lib._typed-racket%2Fbase-env%2Fbase-types-extra..rkt%29._.List%2A%29%29
> >
> > i'm assuming (List* c) is shorthand for (Pair c null)? I don't know typed
> > racket so I've probably got that terribly wrong.
>
> It might be.  But that's normally said as (List c), not List* c)
> With your interpretation, List* qould be equivalent to List.
>
> >
> > So while I can't help you with this - I wanted to encourage you to make a
> > PR to the documentation if you come up with a fix.
>
> My problem is that I don't know what the documentation is supposed to say.
>
> -- hendrik
>
> > It *used* to be hard to find the file that needs the fix, good steps have
> > been made recently to make it easier to identify the documentation source
> > file so it is easier to find and make the corrections or additions.
> >
> > If you have any trouble let me know and I'll try help - I think I'm
> > getting the hang of it.
> >
> > Hope you are well
> >
> > Kind regards
> >
> > Stephen
> >
> > ps i use
> >
> https://blog.racket-lang.org/2017/09/tutorial-contributing-to-racket.html
> &
> > lots of kind guidance from other racketeers :0
> > pps: if you make a successful pr you get credit in the frankly wonderful
> > racket news https://racket-news.com/2020/06/racket-news-issue-32.html
> >
> > On Tue, Jun 2, 2020 at 3:13 PM Hendrik Boom <[email protected]>
> wrote:
> >
> > > In the Typed Racket Reference, List* is defined as follows:
> > >
> > >         (List* t t1 ... s)
> > >
> > > is equivalent to (Pairof t (List* t1 ... s)).
> > >
> > > Following this definition down, we get
> > >
> > > (List* a b c)
> > >  -> (Pairof a (List* b c))
> > >  -> (Pairof a (Pairof b (List* c)))
> > >
> > > But what's (List* c) ?
> > >
> > > I see no explanatory examples.
> > >
> > > -- hendrik
> > >
> > > P.S.  I'm also unsure what 'bound' is supposed to do in
> > >
> > > (List t ... trest ... bound)
> > >
> > > It says "where bound must be an identifier denoting a type variable
> > > bound with ..." but I don't undestand what this is referring to.
> > >
> > > There are no examples of this in the document, just as there are no
> > > examples of List*.
> > >
> > > -- hendrik
> > >
> > > --
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> > >
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> > > .
> > >
> >
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