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Date: Tue, 17 Feb 2015 02:24:21 +0400
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To: Yasuo Ohgaki <yohgaki@ohgaki.net>
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Subject: Re: Annotations in PHP7
From: dmitry@zend.com (Dmitry Stogov)

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On Tue, Feb 17, 2015 at 1:15 AM, Yasuo Ohgaki <yohgaki@ohgaki.net> wrote:

> Hi Dmitry,
>
> On Mon, Feb 16, 2015 at 8:07 PM, Dmitry Stogov <dmitry@zend.com> wrote:
>
>> During discussion of different ways of implementing "Design by Contract"
>> we got an idea of using annotations.
>>
>> BTW: annotations are useful by their own and may be used for different
>> purposes. Support for annotations was proposed long time ago:
>>
>> https://wiki.php.net/rfc/annotations
>> https://wiki.php.net/rfc/annotations-in-docblock
>> https://wiki.php.net/rfc/reflection_doccomment_annotations
>>
>> HHVM already implemented similar concept
>>
>> http://docs.hhvm.com/manual/en/hack.attributes.php
>>
>> I made a quick and dirty PoC that shows how we may implement annotations
>> in PHP7 and how powerful they may be :
>> https://gist.github.com/dstogov/dbf2a8f46e43719bd2c2
>>
>> The test there is self explainable. Of course, annotations just provide a
>> way to add metadata, but doesn't define attribute names or the ways they
>> are going to be used. Only Reflection API to read.
>>
>> There are still a lot of technical problems that have to be solved.
>> Right now, we just need to answer a question - if we like this in PHP7?
>> Thought and opinions are welcome...
>>
>
> Although, I prefer simple DbC as PHP syntax, my priority is introducing DbC
> to PHP. No problem for me.
>

I don't have strong opinion - what is better for DbC, PHP syntax or
annotations.
Now I made some research on annotations, because I think it may be useful
not only for DbC.

Thanks. Dmitry.


> For both annotation and PHP syntax, we should concentrate "simple" (i.e.
> without strong type safety. Don't read me wrong, I'm not saying without
> type check) DbC. IMHO.
>
> Regards,
>
> --
> Yasuo Ohgaki
> yohgaki@ohgaki.net
>

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