Message 384040 - Python tracker

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Author	vstinner
Recipients	corona10, petr.viktorin, pitrou, serhiy.storchaka, shihai1991, vstinner
Date	2020-12-30.01:10:10
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1609290610.57.0.299681996831.issue42747@roundup.psfhosted.org>
In-reply-to

Content
Serhiy Storchaka: > I don't think that it was right thing to break binary compatibility. It virtually buried the stable ABI. IMO there is a misunderstanding about the stable ABI. PyType_FromSpec() doesn't need Py_TPFLAGS_HAVE_xxx flags: this function allocates a heap type which has all these members (set to 0/NULL by default). And it's not possible to define a static type using the limited C API, since the PyTypeObject structure is excluded from it on purpose. See bpo-32388 for a similar discussion.

Serhiy Storchaka:
> I don't think that it was right thing to break binary compatibility. It virtually buried the stable ABI.

IMO there is a misunderstanding about the stable ABI. PyType_FromSpec() doesn't need Py_TPFLAGS_HAVE_xxx flags: this function allocates a heap type which *has* all these members (set to 0/NULL by default).

And it's not possible to define a static type using the limited C API, since the PyTypeObject structure is excluded from it on purpose.

See bpo-32388 for a similar discussion.

History
Date	User	Action	Args
2020-12-30 01:10:10	vstinner	set	recipients: + vstinner, pitrou, petr.viktorin, serhiy.storchaka, corona10, shihai1991
2020-12-30 01:10:10	vstinner	set	messageid: <1609290610.57.0.299681996831.issue42747@roundup.psfhosted.org>
2020-12-30 01:10:10	vstinner	link	issue42747 messages
2020-12-30 01:10:10	vstinner	create