From 2b5fd1e9ca9318673989e6ccac2c8acadc3809cd Mon Sep 17 00:00:00 2001 From: Ivan Levkivskyi Date: Thu, 14 Dec 2017 23:32:56 +0100 Subject: bpo-32226: Implementation of PEP 560 (core components) (#4732) This part of the PEP implementation adds support for __mro_entries__ and __class_getitem__ by updating __build_class__ and PyObject_GetItem. --- Objects/typeobject.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'Objects/typeobject.c') diff --git a/Objects/typeobject.c b/Objects/typeobject.c index 73f94e76c9..5403ecb04f 100644 --- a/Objects/typeobject.c +++ b/Objects/typeobject.c @@ -2377,6 +2377,27 @@ type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds) nbases = 1; } else { + _Py_IDENTIFIER(__mro_entries__); + for (i = 0; i < nbases; i++) { + tmp = PyTuple_GET_ITEM(bases, i); + if (PyType_Check(tmp)) { + continue; + } + tmp = _PyObject_GetAttrId(tmp, &PyId___mro_entries__); + if (tmp != NULL) { + PyErr_SetString(PyExc_TypeError, + "type() doesn't support MRO entry resolution; " + "use types.new_class()"); + Py_DECREF(tmp); + return NULL; + } + else if (PyErr_ExceptionMatches(PyExc_AttributeError)) { + PyErr_Clear(); + } + else { + return NULL; + } + } /* Search the bases for the proper metatype to deal with this: */ winner = _PyType_CalculateMetaclass(metatype, bases); if (winner == NULL) { -- cgit v1.2.1