private static void Remove(ref JoinContext <U, K, T2, T, C> context, out Option <U> next)
{
context.bd.DetectBacktrack();
context.needsMove = false;
context.chained.remove(ref context.chained.context, out context.chained.current);
context.inner = context.chained.current.isSome ?
context.lookup.GetValues(context.outerSelector(context.chained.current.value)).head :
null;
Skip(ref context, out next);
}
private static void Skip(ref JoinContext <U, K, T2, T, C> context, out Option <U> next)
{
context.bd.DetectBacktrack();
if (context.needsMove)
{
context.inner = context.inner.next;
}
else
{
context.needsMove = true;
}
if (context.inner == null && context.chained.current.isSome)
{
context.chained.skip(ref context.chained.context, out context.chained.current);
while (context.chained.current.isSome)
{
context.inner = context.lookup.GetValues(context.outerSelector(context.chained.current.value)).head;
if (context.inner == null)
{
context.chained.skip(ref context.chained.context, out context.chained.current);
}
else
{
break;
}
}
}
if (context.chained.current.isSome)
{
next = new Option <U>(context.resultSelector(context.chained.current.value, context.inner.value));
}
else
{
next = new Option <U>();
context.bd.Release();
if (context.release)
{
context.lookup.DisposeInBackground();
}
}
}