Can someone please tell me how I can see declarat...

# announcements

[Saiedmomen]

Can someone please tell me how I can see declarations of reflection types like KFunction and KSuspendFunction1? I have imported imported kotlin-reflect but I have to manually import them and IDE inspection tools like go to declaration and search in path can't find their declaration

[Marc Knaup]

I think the compiler generates them on-the-fly as needed 🤔
What do you need the source for?

[Saiedmomen]

I'm trying to findout why I can't pass a non suspending block to a higher order function that expects a suspend block. Wanted to read up a bit before posting it to discuss.kotlinlang

[streetsofboston]

A () -> T type is not a ‘sub-class’ of (i.e. ‘assignable to’) a suspend () -> T type… They are entirely separate.

[streetsofboston]

E.g.

var suspendLambda : suspend () -> Int = suspend { 5 }
var lambda : () -> Int = { 5 }

fun main() {
    suspendLambda = lambda // ERROR Type Mismatch
}

[Saiedmomen]

yeah but I think any normal function is also a suspend function

[streetsofboston]

No, not true…

A normal function can be called inside a suspend function, a suspend function cannot be called in a normal function.

This doesn’t mean that a normal function ‘is-a’ suspend function…..

[streetsofboston]

But, I agree, it would be nice if there were some automatic conversions from () -> T to suspend () -> T by the compiler when needed. (like () -> T to KFunction<T> and such…)

[Marc Knaup]

What are you actually trying to achieve?
You can provide overloads for suspend and non-suspend functions.

[Marc Knaup]

There’s the same problem with passing a suspend function to a non-suspend argument of an inline function:

suspend fun doSomething(transform: suspend (Int) -> String) =
    listOf(1,2).map(transform)

Also doesn’t work 😕

But this works:

suspend fun doSomething(transform: suspend (Int) -> String) =
    listOf(1, 2).map { transform(it) }

[Marc Knaup]

Would be nice to have more automatic conversions indeed.

[Saiedmomen]

yeah Anton. Thats exactly what I'd like to see. Sorry for my lack of fluency.

[streetsofboston]

No need to be sorry 🙂 You have legitimate questions.