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import typing
def common_ancestor(*args: object) -> type:
"""
Get the closest common ancestor of the given objects.
:param args: any objects.
:return: the ``type`` of the closest common ancestor of the given ``args``.
"""
return _common_ancestor(args, False)
def common_ancestor_of_types(*args: type) -> type:
"""
Get the closest common ancestor of the given classes.
:param args: any classes.
:return: the ``type`` of the closest common ancestor of the given ``args``.
"""
return _common_ancestor(args, True)
def _common_ancestor(args: typing.Sequence[object], types: bool) -> type:
from typish.functions._get_type import get_type
from typish.functions._get_mro import get_mro
if len(args) < 1:
raise TypeError('common_ancestor() requires at least 1 argument')
tmap = (lambda x: x) if types else get_type
mros = [get_mro(tmap(elem)) for elem in args]
for cls in mros[0]:
for mro in mros:
if cls not in mro:
break
else:
# cls is in every mro; a common ancestor is found!
return cls
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