Bug #63507 [Opn->Csd]: IteratorIterator inheritance problems

Edit report at https://bugs.php.net/bug.php?id=63507&edit=1 ID: 63507 Updated by: levim@php.net Reported by: levim@php.net Summary: IteratorIterator inheritance problems -Status: Open +Status: Closed Type: Bug Package: SPL related PHP Version: Irrelevant -Assigned To: +Assigned To: levim Block user comment: N Private report: N New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. I seem to have tested the wrong things, somehow. Silly mistake. Previous Comments: ------------------------------------------------------------------------ [2012-11-13 22:12:23] levim@php.net Description: ------------ IteratorIterator has a method seek that matches the signature for implementing SeekableIterator, but it doesn't implement the interface. Also, subclasses of IteratorIterator do not inherit the seek method. This breaks the rules for inheritance. I'm not sure how to propose fixing it at this point. This should have been caught before being released. Like much of the SPL, this was not properly thought out and tested. Test script: --------------- $iterator = new IteratorIterator( new EmptyIterator() ); var_dump($iterator instanceof SeekableIterator); var_dump(method_exists($iterator, 'seek'); $iterator = new NoRewindIterator( new EmptyIterator() ); var_dump(method_exists($iterator, 'seek'); Expected result: ---------------- bool(true); bool(true); bool(true); Actual result: -------------- bool(false); bool(true); bool(false); ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63507&edit=1