Eiffel supports multiple inheritance.
As an example, look at the class
FixedList in slide eiffel-inheritance,
which is implemented as
a combination (by inheritance) of
a generic List and a generic Array.
class Fixed_List[T] export ...
Using (multiple) inheritance implies
that a FixedList may be regarded as
a subtype of both Array and List.
However, the export list in the end determines
what interface is provided
and hence what type the class embodies.