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Date: Mon, 3 Jul 2017 18:11:50 +0200
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To: =?UTF-8?Q?Johannes_Schl=C3=BCter?= <johannes@schlueters.de>
Cc: Niklas Keller <me@kelunik.com>, PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] "Reader" as alternative to Iterator
From: andreas@dqxtech.net (Andreas Hennings)

On Mon, Jul 3, 2017 at 6:08 PM, Andreas Hennings <andreas@dqxtech.net> wrot=
e:
> On Mon, Jul 3, 2017 at 5:53 PM, Johannes Schl=C3=BCter
> <johannes@schlueters.de> wrote:
>> On Mo, 2017-07-03 at 17:32 +0200, Niklas Keller wrote:
>>
>>> > That distinction is the reason why next() and valid() are different
>>> > methods in iterators.
>
> I would rather say this is the reason why current() and valid() are
> different methods.
> A combination of ->current() and next() would not cause problems.
>
>>>
>>> Not really, Iterator::next() returns void, so could as well return
>>> bool.

Just so we are on the same page:
Changing the behavior of Iterator interface would be a BC break.
Introducing a new interface, and letting Generator implement it, would
not break anything.
(except for the possible nameclash, if the an interface with the same
name already exists in userland outside of a namespace)

I assume we already agree on this, and this was more of a thought experimen=
t.