RFR: JDK-8319123 : Implementation of JEP-461: Stream Gatherers (Preview) [v2]

[Tagir F. Valeev]

On Sun, 5 Nov 2023 17:40:29 GMT, Tagir F. Valeev <tvaleev at openjdk.org> wrote:

>> Viktor Klang has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Addressing review feedback
>>  - Make Gatherer.andThen take a wildcard for the rhs Gatherer state type
>
> src/java.base/share/classes/java/util/stream/Gatherers.java line 426:
> 
>> 424:      * transformation for scenarios where no combiner-function can be
>> 425:      * implemented, or for reductions which are intrinsically
>> 426:      * order-dependent.
> 
> I think, we should highlight the most important difference between `fold` and `reduce`: `reduce` must provide an associative function, while `fold` does not require this restriction.

Please take a look here, probably this comment was overlooked?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16420#discussion_r1387735052