[Python-Dev] PEP 443 - Single-dispatch generic functions (original) (raw)

Ethan Furman ethan at stoneleaf.us
Thu May 23 17:04:19 CEST 2013

On 05/23/2013 07:58 AM, Łukasz Langa 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): ...

If the stdlib is still staying out of the annotation business, then it should not be allowed.

-- Ethan

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