Bug #55524 [NEW]: Traits should not be able to extend a class

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