[Python-Dev] Comparing PEP 576 and PEP 580
On 2018-07-05 13:32, INADA Naoki wrote:
> Core devs interested in this area is limited resource.
I know and unfortunately there is nothing that I can do about that. It
would be a pity that PEP 580 (or a variant like PEP 576) is not accepted
simply because no core developer cares enough.
> As far as I understand, there are some important topics to discuss.
> a. Low level calling convention, including argument parsing API.
> b. New API for calling objects without argument tuple and dict.
> c. How more types can support FASTCALL, LOAD_METHOD and CALL_METHOD.
> d. How to reorganize existing builtin types, without breaking stable ABI.
Right, that's why I wanted PEP 580 to be only about (c) and nothing
else. I made the mistake in PEP 575 of also involving (d).
I still don't understand why we must finish (a) before we can even start
> Reference implementation helps discussion.
METH_FASTCALL and argument parsing for METH_FASTCALL is already
implemented in CPython. Not in documented public functions, but the
And PEP 580 also has a reference implementation: