Bug #55524 [Asn->Csd]: Traits should not be able to extend a class

Edit report at https://bugs.php.net/bug.php?id=55524&edit=1 ID: 55524 Updated by: gron@php.net Reported by: gron@php.net Summary: Traits should not be able to extend a class -Status: Assigned +Status: Closed Type: Bug Package: Scripting Engine problem PHP Version: 5.4.0alpha3 Assigned To: gron Block user comment: N Private report: N New Comment: This bug has been fixed in SVN. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. For Windows: http://windows.php.net/snapshots/ Thank you for the report, and for helping us make PHP better. Fixed per svn rev 315712. Previous Comments: ------------------------------------------------------------------------ [2011-08-29 15:53:36] gron@php.net Automatic comment from SVN on behalf of gron Revision: http://svn.php.net/viewvc/?view=revision&revision=315712 Log: Fixed bug #55524 Traits should not be able to extend a class # also used the Z_STRVAL where it seemed appropriate ------------------------------------------------------------------------ [2011-08-29 08:25:00] good821 at 126 dot com http://www.officialpackersjerseyshop.com/green-bay-packers-jerseys-paul-hornung-jersey-c-11_25.html Paul Hornung Jersey http://www.officialpackersjerseyshop.com/green-bay-packers-jerseys-ray-nitschke-jersey-c-11_27.html Ray Nitschke Jersey http://www.officialpackersjerseyshop.com/green-bay-packers-jerseys-reggie-white-jersey-c-11_24.html Reggie White Jersey ------------------------------------------------------------------------ [2011-08-29 05:13:33] gron@php.net Checking for interface is already done. As well as checking that classes do not extend traits. I only missed checking that traits do not extend classes, as far as I can tell. Plan to fix it later this week. ------------------------------------------------------------------------ [2011-08-29 01:03:01] kalle@php.net Might also be worth checking the implements keyword if a user tries to implement an interface (or multiple) ------------------------------------------------------------------------ [2011-08-28 08:05:04] gron@php.net 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 this bug report at https://bugs.php.net/bug.php?id=55524&edit=1