[Python-Dev] PEP 443 - Single-dispatch generic functions

[Guido van Rossum]

Ok, happy bikeshedding. I'm outta here until that's settled. :-)

On Thu, May 23, 2013 at 7:58 AM, Łukasz Langa <lukasz at langa.pl> wrote:
> On 23 maj 2013, at 16:49, Guido van Rossum <guido at python.org> wrote:
>
>> Łukasz, are there any open issues? Otherwise I'm ready to accept the PEP.
>
> There's one. Quoting the PEP:
>
> "The dispatch type is currently specified as a decorator argument. The
> implementation could allow a form using argument annotations. This usage
> pattern is out of scope for the standard library (per PEP 8). However,
> whether this registration form would be acceptable for general usage, is
> up to debate."
>
> I feel that the PEP should explicitly allow or disallow for the
> implementation to accept dispatch on annotations, e.g.:
>
> @func.register
> def _(arg: int):
>   ...
>
> versus
>
> @func.register(int)
> def _(arg):
>   ...
>
> --
> Best regards,
> Łukasz Langa
>
> WWW: http://lukasz.langa.pl/
> Twitter: @llanga
> IRC: ambv on #python-dev
>



-- 
--Guido van Rossum (python.org/~guido)