fun create.main() {
    //1. 創(chuàng)建協(xié)程體
    val coroutine = suspend {
        println("in coroutine")
        5
    }.createCoroutine(object: Continuation<Int> {
        override fun resumeWith(result: Result<Int>) {
            println("coroutine end: $result")
        }

        override val context: CoroutineContext
            get() = EmptyCoroutineContext

    })

    //2. 執(zhí)行協(xié)程
    coroutine.resume(Unit)
}

in coroutine
coroutine end: Success(5)

@SinceKotlin("1.3")
internal abstract class BaseContinuationImpl(
    public val completion: Continuation<Any?>?
) : Continuation<Any?>, CoroutineStackFrame, Serializable {
    public final override fun resumeWith(result: Result<Any?>) {
        var current = this
        var param = result
        while (true) {
            probeCoroutineResumed(current)
            with(current) {
                val completion = completion!!
                val outcome: Result<Any?> =
                    try {
                        val outcome = invokeSuspend(param) //1.這里執(zhí)行了 suspend block
                        if (outcome === COROUTINE_SUSPENDED) return
                        Result.success(outcome)
                    } catch (exception: Throwable) {
                        Result.failure(exception)
                    }
                releaseIntercepted()
                if (completion is BaseContinuationImpl) {
                    current = completion
                    param = outcome
                } else {
                    completion.resumeWith(outcome) //2.這里回調(diào)了我們的匿名內(nèi)部類
                    return
                }
            }
        }
    }

    protected abstract fun invokeSuspend(result: Result<Any?>): Any? //3. 抽象方法
}

public final class CreateCoroutineKt {
    public static final void create.main() {
        Continuation coroutine = ContinuationKt.createCoroutine(new CreateCoroutineKt$create.main$coroutine$1(null), new CreateCoroutineKt$create.main$coroutine$2());
        Unit unit = Unit.INSTANCE;
        Result.Companion companion = Result.Companion;
        coroutine.resumeWith(Result.constructor-impl(unit));
    }
}

final class CreateCoroutineKt$create.main$coroutine$1 extends SuspendLambda implements Function1<Continuation<? super Integer>, Object> {
    int label;

    CreateCoroutineKt$create.main$coroutine$1(Continuation<? super CreateCoroutineKt$create.main$coroutine$1> continuation) {
        super(1, continuation);
    }

    @NotNull
    public final Continuation<Unit> create(@NotNull Continuation<?> continuation) {
        return new CreateCoroutineKt$create.main$coroutine$1(continuation);
    }

    @Nullable
    public final Object invoke(@Nullable Continuation<? super Integer> continuation) {
        return create(continuation).invokeSuspend(Unit.INSTANCE);
    }

    @Nullable
    public final Object invokeSuspend(@NotNull Object obj) {
        IntrinsicsKt.getCOROUTINE_SUSPENDED();
        switch (this.label) {
            case 0:
                ResultKt.throwOnFailure(obj);
                System.out.println((Object) "in coroutine"); //協(xié)程體的邏輯
                return Boxing.boxInt(5);
            default:
                throw new IllegalStateException("call to 'resume' before 'invoke' with coroutine");
        }
    }
}