public Logic(TaskCompletionSource <T> promise, LastOrDefaultStage <T> stage) : base(stage.Shape)
{
_promise = promise;
_stage = stage;
SetHandler(stage.In, this);
}
public Logic(TaskCompletionSource <T> promise, LastOrDefaultStage <T> stage) : base(stage.Shape)
{
_stage = stage;
var prev = default(T);
SetHandler(stage.In, onPush: () =>
{
prev = Grab(stage.In);
Pull(stage.In);
},
onUpstreamFinish: () =>
{
var head = prev;
prev = default(T);
promise.TrySetResult(head);
CompleteStage();
},
onUpstreamFailure: cause =>
{
prev = default(T);
promise.TrySetException(cause);
FailStage(cause);
});
}
