Kotlin multiple inheritance between interfaces

Question

i want to know if there'a way to declare that an interface extends another interface with three different generics type parameters

interface AggDBTree: DBTreeInterface<T, X, V>{
 //method declarations
}

zsmb13 · Accepted Answer · 2019-09-11 09:50:05Z

2

If you want that superinterface to have three different generic parameters, you can do that:

interface DBTreeInterface<A, B, C>

interface AggDBTree<T, X, V> : DBTreeInterface<T, X, V>

If you want to implement the same interface, but with various type parameters, that is not possible. So something like this will not compile:

interface DBTreeInterface<T>

interface AggDBTree<A, B> : DBTreeInterface<A>, DBTreeInterface<B>

You can only extend a single interface once.

answered Sep 11, 2019 at 9:50

zsmb13

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