php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #48052 SPLStack::setIteratorMode() throw exception on keep/delete flag
Submitted: 2009-04-22 16:50 UTC Modified: 2009-05-06 15:29 UTC
From: ralph at smashlabs dot com Assigned: colder (profile)
Status: Not a bug Package: SPL related
PHP Version: 5.3, 6CVS (2009-04-25) OS: *
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: ralph at smashlabs dot com
New email:
PHP Version: OS:

 

 [2009-04-22 16:50 UTC] ralph at smashlabs dot com 
Description:
------------
Attempting to change the IteratorMode throws an exception.

The is probably due to the code that changes the LIFO/FIFO ordering that is also settable via the inherited method of SplDoublyLinkedList::setIteratorMode().



Reproduce code:
---------------
<?php

$s = new SPLStack(); 
$s->setIteratorMode(SplDoublyLinkedList::IT_MODE_DELETE);

Expected result:
----------------
Do not throw exception on the following use cases:

->setIteratorMode(SplDoublyLinkedList::IT_MODE_DELETE)
->setIteratorMode(SplDoublyLinkedList::IT_MODE_KEEP)

Actual result:
--------------
PHP Fatal error:  Uncaught exception 'RuntimeException' with message 'Iterators' LIFO/FIFO modes for SplStack/SplQueue objects are frozen' in path/to/test-splstack.php:4
Stack trace:
#0 path/to/test-splstack.php(4): SplDoublyLinkedList->setIteratorMode(1)
#1 {main}
  thrown in path/to/test-splstack.php on line 4

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2009-05-02 13:29 UTC] colder@php.net 
The reason is that setIteratorMode replaces the iterator flags entirely, so you need to specify the order of iteration as well if you want to change the KEEP/DELETE.


Since you use a stack, simply use:
SplDoublyLinkedList:: IT_MODE_DELETE | SplDoublyLinkedList::IT_MODE_LIFO
 [2009-05-06 15:29 UTC] ralph at smashlabs dot com 
Thats fine, and that works.

I guess this needs to be documented inside of setIteratorMode(), I would have never guessed that flags are replaced, my initial assumption would be that they are OR'd with the existing flags.

Thanks for clearing this up.
-ralph
 [2018-07-09 20:55 UTC] claudio at z-files dot de 
While SplStack throws an exception on setting the keep/delete flag, SplQueue is fine with those changes. They both do have a different behaviour for setIteratorMode().
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Wed Jul 02 11:01:36 2025 UTC