def __new__(cls, wrapped):
assert cls is ErrorBag
if is_error_class(wrapped):
if _ABC_NICE_WITH_ERRORS:
self = wrapped
else:
self = super(ErrorBag, cls).__new__(cls)
self.wrapped = wrapped
name = wrapped.__name__
if not hasattr(cls, name):
with _bag_assign.enter():
# to avoid direct assigning block
setattr(cls, name, self)
return wrapped
else:
raise RuntimeError('Error "{}" already adopted.'.format(name))
else:
from xoutil.names import simple_name
msg = 'Parameter `wrapped` must be an exception class, not "{}".'
raise TypeError(msg.format(simple_name(wrapped)))
