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Date: Mon, 20 Aug 2012 21:19:02 +0100
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To: Derick Rethans <derick@php.net>
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Subject: Re: [PHP-DEV] [RFC] Generators
From: ajf@ajf.me (Andrew Faulds)

On 18/08/12 13:21, Derick Rethans wrote:
> On Sat, 11 Aug 2012, Nikita Popov wrote:
>
>> Hi internals!
>>
>> I think there already was a lot of discussion on the generators, so
>> it's time to move to the next step. I'd like to vote on the feature in
>> two weeks, so this the "announce[ment] on internals@, by the author,
>> with the intention of voting on it".
>>
>>      https://wiki.php.net/rfc/generators
>>
>> If you have any further feedback, now would be a good time to raise
>> it. If there is something you previously posted, but which I didn't
>> yet address, please let me know. There were around 150 mails and I
>> sure missed some of them.
> I've some comments how that I've read the RFC:
>
>> Recognition of generator functions
>>
>> 1. Any function which contains a yield statement is automatically a
>> generator function.
>>
>> 2. The initial implementation required that generator functions are
>> marked with an asterix modifier (function*). This method has the
>> advantage that generators are more explicit and also allows for
>> yield-less coroutines.
>>
>> The automatic detection was chosen over the asterix modifier for the
>> following reasons:
> I am against this. This is even more magic in PHP. Is it really that
> difficult to have to mark the function with a different keyword, such as
> "generator":

You know, this conversation feels like it's going in circles. I thought 
we already agreed there wouldn't be one.

>
>> generator function getLinesFromFile($fileName) {
>>      if (!$fileHandle = fopen($fileName, 'r')) {
>>         return;
>>     }
>>      There is an existing generator implementation in HipHop PHP, which
>> uses automatic-detection. Using the asterix modifier would break
>> compatibility.
> This should not be a concern, sure, it's annoying for the hiphop
> developers but they chose to copy and then *chance* the PHP language for
> their own effect.
>
>> yield: Yields the value null with an auto-incrementing integer key.
> What is the usecase for this?
>
> cheers,
> Derick
>


-- 
Andrew Faulds
http://ajf.me/