[issue42035] [C API] PyType_GetSlot cannot get tp_name

[Petr Viktorin]

Petr Viktorin <encukou at gmail.com> added the comment:

Now that I see the implementation (and now that I'm spending a lot of time trying to formalize what is good stable API), I see a problem with PyType_GetName: it effectively returns a borrowed reference.
The proposed docs say:

   Callers can hold [the retuned] pointer until the type has been deallocated.

This is not friendly to alternate Python implementations. For example, if tp_name is stored as UTF-32, it would need to generate the char* data -- and then retain it until the class is deallocated.
I guess the "correct" way would be to return a Py_buffer, which would (in CPython) reference the class.

Victor, what do you think?

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<https://bugs.python.org/issue42035>
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