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.
It's used widely in Python internals already. I suppose that making it public doesn't make Python 3.7 unstable much.
If we can't at Python 3.7, I think we should do it at 3.8.
It is too late for 3.7 in any case.