Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:82882
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: error (pb1.pair.com: domain beberlei.de from 74.125.82.43 cause and error)
MIME-Version: 1.0
In-Reply-To: <CA+9eiLsxSpbdaa7Bpci2PRXQMRkTUiwZphjQYv2iDyXLUhrMow@mail.gmail.com>
References: <CA+9eiLsxSpbdaa7Bpci2PRXQMRkTUiwZphjQYv2iDyXLUhrMow@mail.gmail.com>
Date: Mon, 16 Feb 2015 21:05:30 +0100
Message-ID: <CAEPJdukU+oWaH6jm=vk8chXbwUePsa3KPEXbgfx2BVxWBDbtig@mail.gmail.com>
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>, 
	Yasuo Ohgaki <yohgaki@ohgaki.net>, Sebastian Bergmann <sebastian@php.net>, 
	Stanislav Malyshev <smalyshev@gmail.com>, Rasmus Lerdorf <rasmus@lerdorf.com>
Content-Type: multipart/alternative; boundary=047d7bacb11eb73c8b050f3a1b26
Subject: Re: [PHP-DEV] Annotations in PHP7
From: kontakt@beberlei.de (Benjamin Eberlei)

--047d7bacb11eb73c8b050f3a1b26
Content-Type: text/plain; charset=UTF-8

On Mon, Feb 16, 2015 at 12:07 PM, Dmitry Stogov <dmitry@zend.com> wrote:

> hi,
>
> 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


How about not exposing the AST, and then the userland can pass context to a
method $reflection->getAnnotation($name, $context);

https://gist.github.com/beberlei/0dc36d4412b8e3454912

That way AST is not exposed to userland.

>
>
> 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...
>
> Thanks. Dmitry.
>

--047d7bacb11eb73c8b050f3a1b26--