def dataclass_non_ext_info(self, cdef: ClassDef) -> Optional[NonExtClassInfo]:
"""Set up a NonExtClassInfo to track dataclass attributes.
In addition to setting up a normal extension class for dataclasses,
we also collect its class attributes like a non-extension class so
that we can hand them to the dataclass decorator.
"""
if is_dataclass(cdef):
return NonExtClassInfo(
self.primitive_op(new_dict_op, [], cdef.line),
self.add(TupleSet([], cdef.line)),
self.primitive_op(new_dict_op, [], cdef.line),
self.primitive_op(type_object_op, [], cdef.line),
)
else:
return None
def transform_tuple_expr(builder: IRBuilder, expr: TupleExpr) -> Value:
if any(isinstance(item, StarExpr) for item in expr.items):
# create a tuple of unknown length
return _visit_tuple_display(builder, expr)
# create a tuple of fixed length (RTuple)
tuple_type = builder.node_type(expr)
# When handling NamedTuple et. al we might not have proper type info,
# so make some up if we need it.
types = (tuple_type.types if isinstance(tuple_type, RTuple) else
[object_rprimitive] * len(expr.items))
items = []
for item_expr, item_type in zip(expr.items, types):
reg = builder.accept(item_expr)
items.append(builder.coerce(reg, item_type, item_expr.line))
return builder.add(TupleSet(items, expr.line))