Req #54003 [NEW]: re-enable abstract static methods

From: Date: Sat, 12 Feb 2011 23:14:34 +0000
Subject: Req #54003 [NEW]: re-enable abstract static methods
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-158734@lists.php.net to get a copy of this message 
From:             
Operating system: 
PHP version:      5.3.5
Package:          Class/Object related
Bug Type:         Feature/Change Request
Bug description:re-enable abstract static methods

Description:
------------
hi, please read carefully my request before trash this

since static inheritance is now implemented in php, enabling this again can
provide an awesome natural feature of the language

I talked with some php hackers, and they agree with me, but in past, I did
not have good news about this:

I'm sure my example makes totally sense, and this should stay disabled only
if there are technical limitations that do not matter with the good logic
of my example

in practice, I can understand WONT FIX, but not BOGUS

abstract class AFileSystemItem
{
     public static function                getIfValid   ($fullPath)
     {
          // i use static::isValid to get the method defined in the called
class
          if(static::isValid($fullPath)) return new static($fullPath);
     }
     protected function                    __construct  ($fp){}

     // i want to force real classes to implement a way to check a path
before instance an object
     protected abstract static function    isValid      ($fullPath); //
abstract declaration
}

class Dir extends AFileSystemItem
{
     protected static function             isValid      ($fullPath)  //
implementation
     {
         return is_dir($fullPath);
     }
}

class File extends AFileSystemItem
{
     protected static function             isValid      ($fullPath)  //
implementation
     {
         return is_file($fullPath);
     }
}

class Image extends File
{
     protected static function             isValid      ($fullPath)  //
implementation with override
     {
         if(parent::isValid($fullPath) AND (bool)getimagesize($fullPath))
return true; return false;
     }
}


-- 
Edit bug report at http://bugs.php.net/bug.php?id=54003&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=54003&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=54003&r=trysnapshot53
Try a snapshot (trunk):              http://bugs.php.net/fix.php?id=54003&r=trysnapshottrunk
Fixed in SVN:                        http://bugs.php.net/fix.php?id=54003&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=54003&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=54003&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=54003&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=54003&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=54003&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=54003&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=54003&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=54003&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=54003&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=54003&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=54003&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=54003&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=54003&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=54003&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=54003&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=54003&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=54003&r=mysqlcfg

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