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Date: Tue, 17 Feb 2015 07:24:40 +0900
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To: Dmitry Stogov <dmitry@zend.com>
Cc: PHP Internals <internals@lists.php.net>, Nikita Popov <nikita.ppv@gmail.com>, 
	Guilherme Blanco <guilhermeblanco@gmail.com>, Pierrick CHARRON <pierrick@webstart.fr>, 
	Alexander Lisachenko <lisachenko.it@gmail.com>, Pierre Joye <pierre.php@gmail.com>, 
	Zeev Suraski <zeev@zend.com>, Andi Gutmans <andi@zend.com>, Joe Watkins <pthreads@pthreads.org>, 
	Sebastian Bergmann <sebastian@php.net>, Stanislav Malyshev <smalyshev@gmail.com>, 
	Rasmus Lerdorf <rasmus@lerdorf.com>
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Subject: Re: Annotations in PHP7
From: yohgaki@ohgaki.net (Yasuo Ohgaki)

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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...
>

I also would like to introduce AOP in the future. (or with it)
I thought something like

https://github.com/AOP-PHP/AOP

is good, but we may use annotations. With annotations, we must
define pointcut/etc manually, but AOP by annotation is more
flexible than AspectJ.

Regards,

--
Yasuo Ohgaki
yohgaki@ohgaki.net

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