If I have classes that implement interface

Foo

, when making a

List<Foo>

should be possible without casting the classes to their interface type? When I do

fun listOfFoos(): List<Foo> {
    return listOf(
        FooA(),
        FooB(),
        FooC()
    )
}

it complains that each class is not a

Foo

but a

FooA

FooB

and

FooC

. I would have thought that since they all implement the interface

Foo

it would just work?

It works fine for me: https://pl.kotl.in/g0AugAM0G

Doesn't compile for me. 😕 Type mismatch: inferred type is FooA but expected Foo