From:             
Operating system: Mac (Darwin 10.8.0 i386)
PHP version:      5.4.0alpha3
Package:          Class/Object related
Bug Type:         Feature/Change Request
Bug description:Feature: Trait checks type of consuming class

Description:
------------
For instance, one may require that the use of a trait "requires" that the 
consuming class must be of a certain type or implement a specific
interface.

An example is Doctrine2's ArrayCollection. One may want to write a utility
trait 
that mixes in functionality that is useful to this type of Collection. This
trait 
would work with ArrayCollections or its decedents but would throw an
Exception 
(i.e. TraitConsumerIllegalTypeException) if attempting to use with other
types of 
classes.





-- 
Edit bug report at https://bugs.php.net/bug.php?id=55613&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=55613&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=55613&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=55613&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=55613&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=55613&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=55613&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=55613&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=55613&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=55613&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=55613&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=55613&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=55613&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=55613&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=55613&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=55613&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=55613&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=55613&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=55613&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=55613&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=55613&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=55613&r=mysqlcfg

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