From:             gron
Operating system: 
PHP version:      5.4.0alpha3
Package:          Scripting Engine problem
Bug Type:         Bug
Bug description:Traits should not be able to extend a class

Description:
------------
Spotted by this post: http://zuttonet.com/articles/php-class-traits/

Traits build their own hierarchy of uses, but there is no useful semantics
for 
extending classes.

For instance:


trait Foo extends Base {
    function bar() {}
}


The semantics for that is not defined (and actually at least broken for
abstract 
methods).


This should give a fatal error as would the other way around (Base extends
Foo).


Test script:
---------------
trait Foo extends Base {
    function bar() {}
}

Expected result:
----------------
Fatal error: A trait (Foo) cannot extend a class (Base) in %s on line %d


-- 
Edit bug report at https://bugs.php.net/bug.php?id=55524&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=55524&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=55524&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=55524&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=55524&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=55524&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=55524&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=55524&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=55524&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=55524&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=55524&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=55524&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=55524&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=55524&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=55524&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=55524&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=55524&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=55524&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=55524&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=55524&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=55524&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=55524&r=mysqlcfg

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