CODEWITHSUNDEEP
asynchronouskotlincoroutinekotlin-coroutinessuspend
Alex Elkin
Alex Elkin

Reputation: 624

Kotlin: Higher-order function with Suspend Function return type

How to return suspend function from regular function? How to create suspend function instance?

For example, I can return async result from function:

fun <T> f(g: () -> T): Deferred<T> = GlobalScope.async { g() }

But I notices Kotlin allow the following signature of function:

fun <T> f(g: () -> T): suspend () -> T {
    TODO()
}

How can I implement it?

Upvotes: 1

Views: 1854

Answers (2)

Glenn Sandoval
Glenn Sandoval

Reputation: 3745

@Rene's answer but shorter:

fun <T> f(g: () -> T) = suspend { g() }

Upvotes: 3

Rene
Rene

Reputation: 6258

One way to do it:

fun <T> f(g: () -> T): suspend () -> T {
    suspend fun intern() = g()
    return ::intern
}

Upvotes: 3

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