Hey guys, got a question about typing in Kotlin - I don’t especially know what what this typing mean...

# getting-started

[Krizzu]

Hey guys, got a question about typing in Kotlin - I don’t especially know what what this typing means Int.() -> Unit. I get it’s a function, but this ClassName + dot is strange for me

[menegatti]

the full name of this is function literal with receiver

[Krizzu]

and the receiver has to be a specific type, Int in this example? How one pass such argument?

[spand]

val foo : Int.() -> Unit = TODO(); 1.foo()

[menegatti]

https://kotlinlang.org/docs/reference/lambdas.html#function-literals-with-receiver

[edwardwongtl]

Type.() limits the function to be member function of the Type

[Krizzu]

Oh great, thanks @menegatti @edwardwongtl @spand

[edwardwongtl]

This is also the key of why it is so easy to create DSL using Kotlin