How do you write about coroutines without writing ...

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[Sam]

How do you write about coroutines without writing about coroutines? 😄 I made a list of all the ways I can think of to use suspend in other places besides an ordinary coroutine. I just know there are tons more, though, so I'm really interested to hear what other uses people have found.
https://sam-cooper.medium.com/suspending-kotlin-beyond-coroutines-4c97543b9782

[Youssef Shoaib [MOD]]

You could implement monad comprehensions and even effect handlers ;)

[Adam S]

numbers 6 - there's a good video about reimplementing coroutines

https://www.youtube.com/watch?v=2SpeJj7BUs4▾

[Adam S]

KGP uses coroutines to manage the plugin's lifecycle, to have more fine grained control over the configuration

https://github.com/JetBrains/kotlin/blob/v2.1.20/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginLifecycle.kt#L19-L66

[CLOVIS]

I don't have code publicly available, but I have a small DSL for writing state machines in imperative style

Instead of

class StateMachine {
    private var currentState = State.Initial

    fun next(action: Action) {
        when (action) {
            Action.A ->
            Action.B ->
        }
    }  
}

you can write

val StateMachine = stateMachine {
    waitFor(Action.A)
    // …

    select {
        onAction(Action.A) -> …
        onAction(Action.B) -> …
    }
}

It helps a lot with understanding complex state machines when some actions are allowed in only some situations.

[Sam]

At this rate I'm going to have to write a part two of the article 😄

[Sam]

These are all really cool!