Generic extending class AND implements interface in Kotlin

Question

Say I want a type variable, T, that extends a certain class and implements an interface. Something like:

class Foo <T : Bar implements Baz> { ... } 

What is the syntax for this in Kotlin?

Answer 1

Only one upper bound can be specified inside the angle brackets.

Kotlin offers different syntax for generic constraints when there is more than one constraint:

class Foo<T>(val t: T) where T : Bar, T : Baz { ... } 

and for functions:

fun <T> f(): Foo where T : Bar, T : Baz { ... } 

It is documented here.