C API: Remove Include/errcode.h header file

[vstinner]

Constants exported by the <errcode.h> header file cannot be used outside Python internals. There is no public C API to tokenize a Python source file. I propose to simply remove this header file (move it to the internal C API). It's not included by Python.h.

In Python 3.12, I removed <token.h > header file: see issue #92651.

In Python 3.10, I removed the C API related to AST and the parser, since it was not possible to use it outside Python internals. See: https://docs.python.org/dev/whatsnew/3.10.html#id4

Linked PRs

• gh-107162: Remove errcode.h header file #107163
• gh-107162: Document errcode.h usage in its comment #107177

[serhiy-storchaka]

It is the part of the C API. See PyRun_InteractiveOneFlags() documentation.

[vstinner]

https://docs.python.org/dev/c-api/veryhigh.html#c.PyRun_InteractiveOneFlags

Oh! I looked for errcode.h usage and I couldn't find it. Thanks for pointing me to this function.

I didn't know that these constants are not only used by the tokenizer, but also by the "high-level" API.

Maybe we should just better document this header file. One concern is that constant names are not prefixed by Py_ or PY_. But since it's not included by Python, maybe it's not really an issue.

[vstinner]

I close this issue which is wrong: the <errcode.h> header file is part of the Python C API and used by public PyRun_InteractiveOneFlags() function. I wrote it directly the header file for future readers: 7516953