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bpo-44977: Deprecate delegation of int to __trunc__ (GH-31031)

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Calling int(a) when type(a) implements __trunc__ but not __int__
or __index__ now raises a DeprecationWarning.
This commit is contained in:
Zackery Spytz 2022-02-03 01:43:25 -08:00 • committed by GitHub
parent 7ffe7ba30f
commit b4bd1e1422
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8 changed files with 40 additions and 11 deletions
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5
Objects/abstract.c
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@ -1564,6 +1564,11 @@ PyNumber_Long(PyObject *o)
}
trunc_func = _PyObject_LookupSpecial(o, &PyId___trunc__);
if (trunc_func) {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"The delegation of int() to __trunc__ is deprecated.", 1)) {
Py_DECREF(trunc_func);
return NULL;
}
result = _PyObject_CallNoArgs(trunc_func);
Py_DECREF(trunc_func);
if (result == NULL || PyLong_CheckExact(result)) {