Given that @dataclass is a decorator, and otherwise you're just
defining a class, some concerns:

1. Such proposed syntax would require a change to the language
specification. 

2. It would seem that / and * in a class not decorated with @dataclass
would be of no other utility.

Paul

On Thu, 2021-03-11 at 10:08 -0500, Ricky Teachey wrote:
> On Thu, Mar 11, 2021 at 10:00 AM Ethan Furman <et...@stoneleaf.us>
> wrote:
> > On 3/11/21 4:20 AM, Ricky Teachey wrote:
> > 
> > > This might be a bit of an extreme step to take, but has new
> > syntax for this ever been discussed? Here I am using the same
> > indicator for keyword arguments as in a function signature, hanging
> > on a line by itself:
> > > 
> > ...
> > > @dataclasses.dataclass
> > > class Comparator:
> > >      /  # args become positional after this line
> > >      a: Any
> > >      b: Any
> > >      *  # args become kwd args after this line
> > >      key: Optional[Callable[whatever]] = None
> > 
> > Actually, the '/' indicates that names /before/ it are positional
> > only.
> > 
> > --
> > ~Ethan~
> > 
> 
> 
> Yes you're of course correct! Sorry!
> 
> So the corrected version would be:
> 
> @dataclasses.dataclass
> class Comparator:
>     a: Any
>     b: Any
>      /  # args before this line positional only
>     *  # args become kwd args after this line
>     key: Optional[Callable[whatever]] = None
> 
> ---
> Ricky.
> 
> "I've never met a Kentucky man who wasn't either thinking about going
> home or actually going home." - Happy Chandler
> 
> 
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