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bpo-45383: Inherit MetaClass from bases in FromSpec API #28748

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Merged
encukou merged 19 commits into from
Jun 9, 2022
Merged

bpo-45383: Inherit MetaClass from bases in FromSpec API #28748

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67c8a97
BUG: Inherit MetaClass from bases in FromSpec API
seberg Oct 5, 2021
2012aaa
📜🤖 Added by blurb_it.
blurb-it[bot] Oct 5, 2021
881ba13
MAINT: Address review comments
seberg Oct 20, 2021
6fd1926
Merge in the main branch
encukou May 27, 2022
aad7456
Disallow non-type metaclasses
encukou May 27, 2022
aba4208
Use custom metaclasses for the tests, rather than stuff from ctypes
encukou May 27, 2022
4eb003a
Make PyType_FromMetaclass refcounting easier to follow
encukou May 27, 2022
1ae7969
Adjust documentation
encukou May 27, 2022
6001a33
Fix type warning
encukou May 31, 2022
1ad0eca
Remove unused includes from _testcapimodule.c
encukou May 31, 2022
ea69819
Use an explicit role in the News entry
encukou May 31, 2022
cb1527f
Test that __subclasses__ is updated properly
encukou May 31, 2022
f86d2b5
Document caveats, suggest that PyType_From* is not for user-provided …
encukou May 31, 2022
93c65e8
Remove unused variable
encukou May 31, 2022
d881750
Move bases calculation before the allocation
encukou May 31, 2022
a7af972
Fix compiler warning for Py_NewRef result
encukou Jun 1, 2022
2f47be3
Use PyErr_Occurred rather than a variable
encukou Jun 9, 2022
ef6bcce
Use PEP 7 style
encukou Jun 9, 2022
6b31880
Replace duplicate Py_TPFLAGS_BASETYPE check with an assert
encukou Jun 9, 2022
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Test that __subclasses__ is updated properly
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@encukou
encukou committed May 31, 2022
commit cb1527ff40107f1d3d64799008ac599ab8e5ad9a
19 changes: 19 additions & 0 deletions Modules/_testcapimodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1232,7 +1232,9 @@ test_from_spec_metatype_inheritance(PyObject *self, PyObject *Py_UNUSED(ignored)
PyObject *metaclass = NULL;
PyObject *class = NULL;
PyObject *new = NULL;
PyObject *subclasses = NULL;
PyObject *result = NULL;
int r;

metaclass = PyType_FromSpecWithBases(&MinimalMetaclass_spec, (PyObject*)&PyType_Type);
if (metaclass == NULL) {
Expand All @@ -1252,12 +1254,29 @@ test_from_spec_metatype_inheritance(PyObject *self, PyObject *Py_UNUSED(ignored)
"Metaclass not set properly!");
goto finally;
}

/* Assert that __subclasses__ is updated */
subclasses = PyObject_CallMethod(class, "__subclasses__", "");
if (!subclasses) {
goto finally;
}
r = PySequence_Contains(subclasses, new);
if (r < 0) {
goto finally;
}
if (r == 0) {
PyErr_SetString(PyExc_AssertionError,
"subclasses not set properly!");
goto finally;
}

result = Py_NewRef(Py_None);

finally:
Py_XDECREF(metaclass);
Py_XDECREF(class);
Py_XDECREF(new);
Py_XDECREF(subclasses);
return result;
}

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