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Date: Tue, 11 Dec 2007 18:42:31 -0500
Sender: david.coallier@gmail.com
To: "Gregory Beaver" <greg@chiaraquartet.net>
Cc: "internals Mailing List" <internals@lists.php.net>
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References: <475F1984.603@chiaraquartet.net>
Subject: Re: [PHP-DEV] namespace improvements to be committed very soon - final review
From: davidc@php.net ("David Coallier")

On Dec 11, 2007 6:13 PM, Gregory Beaver <greg@chiaraquartet.net> wrote:
> Hi,
>
> I've been furiously working behind the scenes with Stas and Dmitry, and
> have some enhancements to namespaces in the form of 2 patches.
>
> 1) multiple namespaces per file
> 2) use ::name;
>
> 1) multiple namespaces per file
>
> This is implemented as such:
>
> <?php
> namespace one;
> use Blah::A;
> // code
> namespace two;
> use Foo::A;
> ?>
>
> The example above shows that imported names are reset at each namespace
> declaration.  There is no prohibition on this code:
>
> <?php
> namespace one; {
> use Blah::A;
> // code
> }
> namespace two; {
> use Foo::A;
> // code
> }
> ?>
>

namespace name; {
...
}
 ??? You can already do that... it's just adding random { }


> Users who wish to use brackets may do so.  The performance penalty
> imposed by using brackets is minor for some cases, and for users who are
> following the recommended practice of 1 namespace per file, the syntax
> is ideal.
>
> Patch is:
>
> http://pear.php.net/~greg/namespace/PHP_5_3/multi.patch.txt
> http://pear.php.net/~greg/namespace/PHP_6_0/multi.patch.txt
>
> Note that non-namespaced code cannot be present in a file containing
> namespaces.  For users who are bundling, this will mean you will need to
> create 2 files, one with non-namespaced code, and one with namespaced
> code.  This minor prohibition is a design decision, not a technical
> problem in the implementation.
>
> 2) use ::name
>
> This code:
>
> <?php
> namespace Whatever;
> use MDB2; // import PEAR's ::MDB2 from global scope
> $a = MDB2::connect();
> ?>
>
> is currently impossible, which will make namespacing old code harder.
> The patch introduces this new syntax to import names from the global
> namespace:
>
> <?php
> use ::MDB2, ::strlen as len;
> ?>
>
> http://pear.php.net/~greg/namespace/PHP_5_3/use.patch.txt
> http://pear.php.net/~greg/namespace/PHP_6_0/use.patch.txt
>
> These patches are for review of both serious technical and serious
> implementation issues.  In order to help move things along, I'd like to
> define "serious" as something directly related to the implementation
> that would cause a failure in PHP's ability to run scripts
> deterministically, or some kind of memory leak/crash.
>
> commit is planned for the next 24 hours or so, but of course any issues
> found in review can be fixed.  The patches are short, so in the worst
> case, reverting is not difficult.
>
> Thanks,
> Greg
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>



-- 
David Coallier,
Founder & Software Architect,
Agora Production (http://agoraproduction.com)
51.42.06.70.18