[Python-Dev] Can we make METH_FASTCALL public, from Python 3.7? (ref: PEP 579

[INADA Naoki]

2018年6月21日(木) 1:59 Serhiy Storchaka <storchaka at gmail.com>:

> 20.06.18 18:42, INADA Naoki пише:
> > First of all, thank you Jeroen for writing nice PEPs.
> >
> > When I read PEP 579, I think "6. METH_FASTCALL is private and
> undocumented"
> > should be solved first.
> >
> > I don't have any idea about changing METH_FASTCALL more.
> > If Victor and Serhiy think so, and PyPy maintainers like it too, I want
> > to make it public
> > as soon as possible.
>
> I don't have objections against making the METH_FASTCALL method calling
> convention public. But only for positional-only parameters, the protocol
> for keyword parameters is more complex and still can be changed.
>
> We should to provide also APIs for calling functions using this protocol
> (_PyObject_FastCall) and for parsing arguments (_PyArg_ParseStack). We
> may want to bikeshed names and the order of arguments for them.
>

Calling API can be determined later.  Even without the API, methods can be
called faster from Python core.

But for parsing API, you're right. It should be public with METH_FASTCALL.
Only positional arguments can be received without it.


>
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