[issue45025] Reliance on C bit fields in C API is undefined behavior

[Petr Viktorin]

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

PyUnicode_KIND does *not* expose the implementation details to the programmer.

If the internal representation os strings is switched to use masks and shifts instead of bitfields, PyUnicode_KIND (and others) can be adapted to the new details without breaking API compatibility.
And that switch would fix this issue.

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<https://bugs.python.org/issue45025>
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