Hi! How do I make this compile? ```private suspend fun myStruct(): MyStruct = MyStruct(1) { foo(...

# coroutines

[iex]

Hi! How do I make this compile?

private suspend fun myStruct(): MyStruct = MyStruct(1) {
    foo()
}

suspend fun foo() {}

private data class MyStruct(
    val a: Int,
    val callback: (() -> Unit)?
)

[Adam Powell]

What would you like the behavior of a call to myStruct() to be?

[streetsofboston]

foo is a suspend fun. Your callback parameter must be declared suspend as well if passing it foo , or something calling foo, must compile (or make foo a regular non-suspending fun works as well 😀)

[streetsofboston]

(also, no need to make myStruct a suspend fun if you are not calling callback from it...)

private fun myStruct(): MyStruct = MyStruct(1) {
    foo()
}

suspend fun foo() {}

private data class MyStruct(
    val a: Int,
    val callback: (suspend () -> Unit)?
)

[iex]

@streetsofboston I did try that out but it didn't compile:

Modifier 'suspend' is not applicable to 'non-functional type'

(on the lambda's suspend)

[streetsofboston]

Sorry, fixed my answer... Put the ( in the correct place now.

[iex]

ah thanks!

[iex]

compiles 🙂

[iex]

@Adam Powell myStruct() doesn't have to be actually suspended. I was just struggling to make the callback suspended (where I'm calling send on a BroadcastChannel)

[Daniel]

callback needs to be a suspending lambda like they said