On Wed, 27 Nov 2024 16:01:53 GMT, Michel Charpentier <d...@openjdk.org> wrote:
>> Viktor Klang has updated the pull request incrementally with one additional >> commit since the last revision: >> >> Addressing review feedback > > I just noticed this improved performance in Java 23. However, it still > doesn't fit my needs because this doesn't work: > > > Stream.of(1) > .flatMap(c -> Stream.generate(() -> 1).flatMap(x -> Stream.generate(() -> x))) > .iterator() > .next() > > > Should it work? And how else can one use some stream elements in a > non-terminal way? > (See my forum question here: > https://forums.oracle.com/ords/apexds/post/laziness-of-stream-iterators-3439.) @charpov `Stream::iterator()` and `Stream::spliterator()` both consume the stream when they are invoked, so they are terminal operations. Converting a push-style stream (which the reference implementation of Stream is) to a pull-style stream (which Spliterator and Iterator are) has limitations—as you discovered. In the future, questions like these are likely better submitted to [core-libs-dev](https://mail.openjdk.org/pipermail/core-libs-dev/) ------------- PR Comment: https://git.openjdk.org/jdk/pull/18625#issuecomment-2531340205
