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

go to bug id or search bugs for

Bug #69160 Yield with operator regression
Submitted: 2015-03-02 15:23 UTC Modified: 2015-03-09 11:43 UTC
From: pierre at pcservice dot co dot za Assigned: nikic (profile)
Status: Closed Package: Unknown/Other Function
PHP Version: master-Git-2015-03-02 (Git) OS: ALL
Private report: No CVE-ID: None
View Add Comment Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If this is not your bug, you can add a comment by following this link.
If this is your bug, but you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: pierre at pcservice dot co dot za
New email:
PHP Version: OS:

 

 [2015-03-02 15:23 UTC] pierre at pcservice dot co dot za 
Description:
------------
When yielding using + or - operator, the value is returned before the operation is performed. In previous versions of PHP (>= 5.5 && < 7.0-dev) the operation was first performed on the value before it was return.

Test script:
---------------
function a () {
    echo yield + 3;
}

$a = a();
$a->send(42);

Expected result:
----------------
45

Actual result:
--------------
42

Patches

Add a Patch

Pull Requests

Pull requests:

Add a Pull Request

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2015-03-04 06:25 UTC] laruence@php.net
-Assigned To: +Assigned To: nikic
 [2015-03-07 19:38 UTC] bwoebi@php.net 
This isn't a bug: It's now handled as unary operator due to yield operator having right associativity with high precedence and not requiring parenthesis anymore.

It is basically a BC break caused by AST RFC and should be noted as such in UPGRADING under Backward Incompatible Changes.

For this particular case you now either have to put the operand before the yield:
echo 3 + yield;

Or put parenthesis around it:
echo (yield) + 3;
 [2015-03-09 11:43 UTC] nikic@php.net
-Status: Assigned +Status: Closed
 [2015-03-09 11:43 UTC] nikic@php.net 
UPGRADING note added in https://github.com/php/php-src/commit/2f156c61f19a889c8ed39fe8eb3b3220555db647.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Fri Apr 26 03:01:32 2024 UTC