The #' entry is also not quite right, semantically.  #' is just an
abbreviation for "syntax" as ' is an abbreviation for quote.  As
lexical syntax, it is not connected to syntax datums.  It is not
recognized by the syntax-case system, either.  It just happens that,
in the standard library, the identifier "syntax" is a keyword that,
when used, evaluates to a syntax object.

For example '#'x just evaluates to the list (syntax x).

This may sound pedantic, but I think getting things right helps reduce
confusion, especially for people new to Scheme.

Am Mi., 9. Nov. 2022 um 18:04 Uhr schrieb Marc Nieper-Wißkirchen
<xxxxxx@gmail.com>:
>
> Am Mi., 9. Nov. 2022 um 17:55 Uhr schrieb Lassi Kortela <xxxxxx@lassi.io>:
> >
> > > No, at least not for Chez.
> > >
> > > (display '#&123)
> >
> > That works, too.
> >
> > I've updated <https://registry.scheme.org/#hash-syntax> and added the
> > following note: "A quote ' next to an implementation's name means the
> > syntax must be quoted in that implementation."
>
> The syntax itself does not need to be quoted.  If you want to make it
> a valid Scheme expression, you have to use the quote expression from
> the standard.
>
> In any case, this is not a Chez thing, but an R[56]RS thing; many
> syntactic data (vectors, bytevectors, ...) do not form a valid
> expression.
>
> I don't think your note belongs to this table in the Scheme registry.
> For otherwise, you would need the same note for vectors, bytevectors,
> etc. at least for R[56]RS implementations.
>
> Moreover, the table is about lexical syntax and #&123 is a valid
> lexical syntax (in Chez Scheme mode): Just enter (read) at the REPL
> and then enter #&123.
>
> >
> > The entry is now:
> >
> > #&...   Box ['Chez, 'Gambit, Racket]