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// pseudocode
// marked by label
// ↓      ↓
label: whenStart
when (continuation.label) {
    0 -> {
        ...
    }

    1 -> {

chaxiu

// Have fun!
@Nullable
public static final Object testCoroutine(@NotNull Continuation $completion) {
    Object $continuation;
    label37: {
        if ($completion instanceof <TestSuspendKt$testCoroutine$1>) {
            $continuation = (<TestSuspendKt$testCoroutine$1>)$completion;
            if ((((<TestSuspendKt$testCoroutine$1>)$continuation).label & Integer.MIN_VALUE) != 0) {
                ((<TestSuspendKt$testCoroutine$1>)$continuation).label -= Integer.MIN_VALUE;
                break label37;

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Diagram Coroutines: suspend

1. Preface

Coroutines is the most amazing feature in Kotlin.

In this post, I'll briefly introduce Kotlin coroutines, and then explain Coroutines in the form of Diagram + Animation. After reading this post, you may find out that Coroutines is not that difficult.