What kind of syntax is that??? Union type in Kotlin?

# react

[Robert Jaros]

What kind of syntax is that??? Union type in Kotlin?

[Big Chungus]

You mean intersection?

[Robert Jaros]

yes

[Big Chungus]

Fun fact, union types are already in kotlin IR and used by the compiler internally. We also have a single union type in public type system - Any? = Any | null

[Big Chungus]

First time I'm seeing intersections, though

[turansky]

сс @Sergei Grishchenko

[Sergei Grishchenko]

fun <P> fn(props: P) where P : FirstInterface, P : SecondInterface

It is example of intersections in kotlin, type P will have type FirstInterface & SecondInterface but it is quite limited solution for intersection declaration