Proposal: JDK-8148917 Enhanced-For Statement Should Allow Streams
peter.levart at gmail.com
Fri Mar 15 07:03:49 UTC 2019
On 3/15/19 12:16 AM, Stephen Colebourne wrote:
> On Thu, 14 Mar 2019 at 19:45, Brian Goetz <brian.goetz at oracle.com> wrote:
>> Why not make `Iterator` implement `IterableOnce`? The default method
>> would obviously just return `this`.
>> Such a default would not conform to the contract, as IO requires that subsequent calls throw.
> IterableOnce.wrap(iterator) ?
> Not providing some kind of connection between these types will look
> pretty silly I think.
That makes sense, yes. As a utility method for adapting in situations
where there's an unconsumed Iterator at hand and you have to provide a
"well behaved" IterableOnce. I would call it IterableOnce.of(Iterator)
as it does not really adapt the Iterator, but creates a factory with
provided Iterator. Using this would be preferable to sprinkling ad-hoc
(IterableOnce<T>) () -> iterator
as such IterableOnce instances would not conform to the spec.
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