Does HPy have any clear guidance or assistance for their users to keep
it up to date?
I'm concerned that if we simply substitute "support the C API for
everyone" with "support the C API for every version of HPy" we're no
better off.
I think it can be done with clear communication from the HPy project
(and us when we endorse it) that they will *never* break compatibility
and it's *always* safe (and indeed, essential) for their users to use
the latest version. But that's a big commitment that I can't sign them
up for.
Cython seems to manage it okay. I can't remember the last compat issue I
had there that wasn't on our (C-API) side.
Thoughts?
Cheers,
Steve
On 1/28/2022 4:50 PM, Victor Stinner wrote:
Wait, where is the HPy project in that plan? :-) The HPy project
(brand new C API) is a good solution for the long term!
My concerns about HPy right now is that, in short, CPython has to
continue supporting the C API for a few more years, and we cannot
evolve CPython before it will become reasonable to consider removing
the "legacy" C API.
I explained that in details in the PEP 674 (Disallow using Py_TYPE()
and Py_SIZE() macros as l-values):
https://www.python.org/dev/peps/pep-0674/#relationship-with-the-hpy-project
In parallel, we should continue promoting the usage of Cython, cffi,
pybind11 and HPy, rather than using directly the C API.
Victor
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