Req #60573 [Opn]: type hinting with "self" keyword causes weird errors
| From: | laruence@php.net | Date: | Tue, 20 Dec 2011 12:31:45 +0000 |
| Subject: | Req #60573 [Opn]: type hinting with "self" keyword causes weird errors | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-165988@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=60573&edit=1
ID: 60573
Updated by: laruence@php.net
Reported by: jpauli@php.net
Summary: type hinting with "self" keyword causes weird errors
Status: Open
Type: Feature/Change Request
Package: Scripting Engine problem
Operating System: *nix
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
This is really a tough one, think about following:
<?php
class Foo {
public function setSelf(self $s) { }
}
class Bar extends Foo {
public function setSelf(parent $s) { }
}
?>
---------------------
<?php
class Foo {
public function setSelf(Foo $s) { }
}
class Bar extends Foo {
public function setSelf(parent $s) { }
}
-----------------------
<?php
class Base {
}
class Foo extends Base{
public function setSelf(parent $s) { }
}
class Bar extends Foo {
public function setSelf(Base $s) { }
}
and more.......
Previous Comments:
------------------------------------------------------------------------
[2011-12-20 10:56:31] jpauli@php.net
Description:
------------
"self" should be thought as "the class where the keyword is written in".
Here is then a strange behavior using inheritance :
Test script:
---------------
class Foo {
public function setSelf(self $s) { }
}
class Bar extends Foo {
public function setSelf(self $s) { }
}
Expected result:
----------------
Strict Standards as Bar::setself() signature doesn't respect Foo::setSelf()
signature.
Foo's one has a type hint on Foo (using self keyword), but Bar's one on Bar
(still using self keyword) : the methods then have a signature mismatch, and PHP
should complain about that
Actual result:
--------------
Nothing happens.
Trying this gives the correct E_STRICT error, correct behavior :
class Foo {
public function setSelf(Foo $s) { }
}
class Bar extends Foo {
public function setSelf(Bar $s) { }
}
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=60573&edit=1