Is there a way to overload a function's suspension...

# random

[rtsketo]

Is there a way to overload a function's suspension?

fun foo(() -> Unit): Unit = ...
suspend foo(suspend () -> Unit): Unit = ...

For example, to make foo(..) suspend only if its argument is suspend also.
The above code does compile, but foo { } is ambiguous.

[ephemient]

no 😞
if you don't want to write the implementation twice, you could

private inline fun fooImpl(() -> Unit): Unit = ...
fn foo(() -> Unit): Unit = fooImpl(...)
suspend fun foo(suspend () -> Unit): Unit = fooImpl(...)

[louiscad]

If the function is inline, that's already the default behavior. That's how you can suspend within blocks passed to apply, also, with, let, and run.