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Call __set_name__ on descriptors when initializing types #1835

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Merged
youknowone merged 1 commit into from
Apr 3, 2020
Merged

Call __set_name__ on descriptors when initializing types #1835

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3 changes: 2 additions & 1 deletion Lib/functools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,8 @@

__all__ = ['update_wrapper', 'wraps', 'WRAPPER_ASSIGNMENTS', 'WRAPPER_UPDATES',
'total_ordering', 'cmp_to_key', 'lru_cache', 'reduce', 'partial',
'partialmethod', 'singledispatch', 'singledispatchmethod']
'partialmethod', 'singledispatch', 'singledispatchmethod',
"cached_property"]

from abc import get_cache_token
from collections import namedtuple
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31 changes: 25 additions & 6 deletions vm/src/obj/objtype.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -291,14 +291,33 @@ impl PyClassRef {
}
}

match new(metatype, name.as_str(), base.clone(), bases, attributes) {
Ok(typ) => {
typ.slots.borrow_mut().flags = base.slots.borrow().flags;
vm.ctx.add_tp_new_wrapper(&typ);
Ok(typ.into())
let typ = new(metatype, name.as_str(), base.clone(), bases, attributes)
.map_err(|e| vm.new_type_error(e))?;

typ.slots.borrow_mut().flags = base.slots.borrow().flags;
vm.ctx.add_tp_new_wrapper(&typ);

for (name, obj) in typ.attributes.borrow().iter() {
if let Some(meth) = vm.get_method(obj.clone(), "__set_name__") {
let set_name = meth?;
vm.invoke(
&set_name,
vec![typ.clone().into_object(), vm.new_str(name.clone())],
)
.map_err(|e| {
let err = vm.new_runtime_error(format!(
"Error calling __set_name__ on '{}' instance {} in '{}'",
obj.class().name,
name,
typ.name
));
err.set_cause(Some(e));
err
})?;
}
Err(string) => Err(vm.new_type_error(string)),
}

Ok(typ.into_object())
}

#[pyslot]
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