override fun isCancelled()

in integration/kotlinx-coroutines-guava/src/ListenableFuture.kt [393:411]

• 10 lines of code
• 6 McCabe index (conditional complexity)

    override fun isCancelled(): Boolean {
        // This expression ensures that isCancelled() will *never* return true when isDone() returns false.
        // In the case that the deferred has completed with cancellation, completing `this`, its
        // reaching the "cancelled" state with a cause of CancellationException is treated as the
        // same thing as auxFuture getting cancelled. If the Job is in the "cancelling" state and
        // this Future hasn't itself been successfully cancelled, the Future will return
        // isCancelled() == false. This is the only discovered way to reconcile the two different
        // cancellation contracts.
        return auxFuture.isCancelled || isDone && !auxFutureIsFailed && try {
            Uninterruptibles.getUninterruptibly(auxFuture) is Cancelled
        } catch (e: CancellationException) {
            // `auxFuture` got cancelled right after `auxFuture.isCancelled` returned false.
            true
        } catch (e: ExecutionException) {
            // `auxFutureIsFailed` hasn't been updated yet.
            auxFutureIsFailed = true
            false
        }
    }