On Tue, Jun 16, 2015 at 1:43 AM, Paul Sandoz <paul.san...@oracle.com> wrote:
> > It's a subtle area. Certain Spliterator characteristics refer to the > (element) source namely, NONULL, IMMUTABLE and CONCURRENT. > Yes, it's subtle. I went back and studied http://download.java.net/jdk9/docs/api/java/util/Spliterator.html#CONCURRENT It strongly suggests that CONCURRENT always refers to the original source (top-level Spliterator) while SIZED and IMMUTABLE refer to "this" spliterator. Most surprisingly, it suggests that LTQSpliterator.trySplit should return a spliterator that is both CONCURRENT and IMMUTABLE. """A top-level Spliterator should not report both CONCURRENT and IMMUTABLE, since they are mutually exclusive. Such a Spliterator is inconsistent and no guarantees can be made about any computation using that Spliterator. Sub-spliterators may report IMMUTABLE if additions or removals to the source are not reflected when traversing."""
