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Date: Wed, 5 Nov 2008 00:49:25 +0100
Reply-To: Marcus Boerger <helly@php.net>
Message-ID: <885621138.20081105004925@marcus-boerger.de>
To: Lukas Kahwe Smith <mls@pooteeweet.org>
CC: Marcus Boerger <helly@php.net>, Gregory Beaver <greg@chiaraquartet.net>, 
	Christian Schneider <cschneid@cschneid.com>, 
	PHP Development <internals@lists.php.net>
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Subject: Re: [PHP-DEV] namespace separator and whining
From: helly@php.net (Marcus Boerger)

Hello Lukas,

Wednesday, November 5, 2008, 12:32:19 AM, you wrote:


> On 05.11.2008, at 00:12, Marcus Boerger wrote:
>>> classes:
>>> 1) try ns::class
>>> 2) autoload ns::class
>>> 3) fail
>>
>> Since we can stack autoload we could provide a c-level autoload  
>> function
>> that does the default lookup.
>>
>> function global_autoload($name) {
>>  if (($p = strrpos($name, '\\')) !== false) {
>>    $name = substr($name, $p);
>>    if (__NAMESPACE__ == substr($name, 0, $p -1) && class_exists("\\ 
>> $name")) {
>>      use "\\$name";    // if we find a way to do this at C-levle
>>    }
>>  }
>> }


> just to make sure i understand this correctly .. you are suggesting  
> here that we make it somehow possible in __autoload() to fallback to  
> the global namespace. so that if someone wants the fallback to global  
> namespace behavior for classes, he could get this by calling this  
> standard autoload function (or rather by using the spl autoload stack  
> - noting that spl may not be disabled anymore as of PHP 5.3).

yes

> more specifically you want to enable use statements inside autoload. i

and yes

> presume that use statement would only be in effect for this single  
> name resolution?

and yes

> as in the use statement would not have an affect on
> subsequent triggering of autoload, even when originating from the same  
> file?

and yes

or in other words give the user the ability to specify when he wants the
fallback to global and not doing a fallback to global per default. That way
we get an efficient lookup witout a double retry:
1) local
2) autoload
3) fail
while the user can stack above in first:
1) local
2.1) autoload as above == global
2.n) autoload
3) fail
and also stack at the end:
1) local
2.n) autoload
2.X) autoload as above == global
3) fail

Best regards,
 Marcus