Lambda with default parameter, possible in kotlin?...

# random

[Fergus Hewson]

Lambda with default parameter, possible in kotlin?

class A
val factory = { a: A = A() -> println(a) }

[groostav]

uhhh slightly different syntax might be

Class A
val factory = fun(a: A = A()) { println(a) }

[groostav]

Anonymous functions cannot specify default values for their parameters.

nope

[Klitos Kyriacou]

Function references can't use default arguments either. Only real functions can.

class A
fun main() {
    fun factoryFun(a: A = A()) { println(a) }
    val factory = ::factoryFun
    factoryFun()  // OK
    factory()     // Error: No value passed for parameter 'a'
    val factory2 = { factoryFun() }
    factory2()    // OK
}