def _add_attrs_magic_attribute(
ctx: 'mypy.plugin.ClassDefContext',
attrs: 'List[Tuple[str, Optional[Type]]]') -> None:
any_type = AnyType(TypeOfAny.explicit)
attributes_types: 'List[Type]' = [
ctx.api.named_type_or_none('attr.Attribute', [attr_type or any_type])
or any_type for _, attr_type in attrs
]
fallback_type = ctx.api.named_type('builtins.tuple', [
ctx.api.named_type_or_none('attr.Attribute', [any_type]) or any_type,
])
ti = ctx.api.basic_new_typeinfo(MAGIC_ATTR_CLS_NAME, fallback_type, 0)
ti.is_named_tuple = True
for (name, _), attr_type in zip(attrs, attributes_types):
var = Var(name, attr_type)
var.is_property = True
proper_type = get_proper_type(attr_type)
if isinstance(proper_type, Instance):
var.info = proper_type.type
ti.names[name] = SymbolTableNode(MDEF, var, plugin_generated=True)
attributes_type = Instance(ti, [])
# TODO: refactor using `add_attribute_to_class`
var = Var(name=MAGIC_ATTR_NAME,
type=TupleType(attributes_types, fallback=attributes_type))
var.info = ctx.cls.info
var.is_classvar = True
var._fullname = f"{ctx.cls.fullname}.{MAGIC_ATTR_CLS_NAME}"
ctx.cls.info.names[MAGIC_ATTR_NAME] = SymbolTableNode(
kind=MDEF,
node=var,
plugin_generated=True,
no_serialize=True,
)
