[3.10] gh-99249: Clarify "read-only" slots tp_bases & tp_mro (GH-99342) #99838
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…-99342) These slots are marked "should be treated as read-only" in the table at the start of the document. That doesn't say anything about setting them in the static struct. `tp_bases` docs did say that it should be ``NULL`` (TIL!). If you ignore that, seemingly nothing bad happens. However, some slots may not be inherited, depending on which sub-slot structs are present. (FWIW, NumPy sets tp_bases and is affected by the quirk -- though to be fair, its DUAL_INHERIT code probably predates tp_bases docs, and also the result happens to be benign.) This patch makes things explicit. It also makes the summary table legend easier to scan. (cherry picked from commit 219696a) Co-authored-by: Petr Viktorin <encukou@gmail.com> Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
This was referenced Nov 28, 2022
kumaraditya303
approved these changes
Nov 28, 2022
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These slots are marked "should be treated as read-only" in the
table at the start of the document. That doesn't say anything about
setting them in the static struct.
tp_basesdocs did say that it should beNULL(TIL!). If youignore that, seemingly nothing bad happens. However, some slots
may not be inherited, depending on which sub-slot structs are present.
(FWIW, NumPy sets tp_bases and is affected by the quirk -- though to
be fair, its DUAL_INHERIT code probably predates tp_bases docs, and
also the result happens to be benign.)
This patch makes things explicit.
It also makes the summary table legend easier to scan.
(cherry picked from commit 219696a)
Co-authored-by: Petr Viktorin encukou@gmail.com
Co-authored-by: Kumar Aditya 59607654+kumaraditya303@users.noreply.github.com