[mypyc] Fixing __init__ for classes with @attr.s(slots=True). #18447
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JukkaL
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Jan 14, 2025
mypyc/lib-rt/misc_ops.c
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| @@ -381,17 +381,30 @@ CPyDataclass_SleightOfHand(PyObject *dataclass_dec, PyObject *tp, | |||
| if (!res) { | |||
| goto fail; | |||
| } | |||
| Py_DECREF(res); | |||
| // These attributes are added or modified by @attr.s(slots=True). | |||
| const char * const keys[] = {"__attrs_attrs__", "__attrs_own_setattr__", "__init__", ""}; | |||
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What about doing this only when using @attr.s, but not for a regular dataclass? E.g. pass a flag to the function indicating whether we are dealing with an attrs class.
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If my understanding is correct, CPython actually uses res but CPyDataclass_SleightOfHand(...) is throwing it away. So, copying attributes will probably reduce errors. Anyway, I have added a condition to copy attributes only for attr and attr-auto dataclasses. Please take a look.
advait-dixit
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x612skm
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Feb 24, 2025
…#18447) Fixes mypyc/mypyc#1079. `@attr.s` generates a `__init__` function which was getting lost in `CPyDataclass_SleightOfHand`. This change copies the generated `__init__` function and a couple of others ones to maintain consistency with CPython.
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Fixes mypyc/mypyc#1079.
@attr.sgenerates a__init__function which was getting lost inCPyDataclass_SleightOfHand. This change copies the generated__init__function and a couple of others ones to maintain consistency with CPython.