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from typing import TypeVar
from typing_extensions import Never
from returns.interfaces import altable, mappable
_FirstType = TypeVar('_FirstType')
_SecondType = TypeVar('_SecondType')
_ThirdType = TypeVar('_ThirdType')
class BiMappableN(
mappable.MappableN[_FirstType, _SecondType, _ThirdType],
altable.AltableN[_FirstType, _SecondType, _ThirdType],
):
"""
Allows to change both types of a container at the same time.
Uses ``.map`` to change first type and ``.alt`` to change second type.
See also:
- https://typelevel.org/cats/typeclasses/bifunctor.html
"""
__slots__ = ()
#: Type alias for kinds with two type arguments.
BiMappable2 = BiMappableN[_FirstType, _SecondType, Never]
#: Type alias for kinds with three type arguments.
BiMappable3 = BiMappableN[_FirstType, _SecondType, _ThirdType]
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