#44043 [Opn]: Enforcing a method without specifying the arguments
| From: | helly@php.net | Date: | Mon, 04 Feb 2008 20:27:32 +0000 |
| Subject: | #44043 [Opn]: Enforcing a method without specifying the arguments | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-121963@lists.php.net to get a copy of this message | ||
ID: 44043
Updated by: helly@php.net
Reported By: j dot boggiano at seld dot be
Status: Open
Bug Type: Class/Object related
-Operating System: Windows/Linux
+Operating System: *
PHP Version: 6CVS-2008-02-04 (snap)
New Comment:
What we could do is adding '...'. That way you can do stuff like:
interface Foo {
function bar($first, ...);
}
Now all classes that derive from Foo must implement the same function
protocol, for instance:
class Baz {
function bar($first, ...) {}
}
Anything else would violate the inheritance rules.
Previous Comments:
------------------------------------------------------------------------
[2008-02-04 18:44:46] j dot boggiano at seld dot be
Description:
------------
The purpose of this is to allow an abstract class or an interface to
enforce the implementation of a method, without however enforcing the
arguments signature.
This is -as I understand it- not a bug, but a feature request.
Reproduce code:
---------------
/***
* This works in PHP5 but does not anymore in PHP6
*/
class Parnt {
public function foo() {}
}
class Child extends Parnt {
public function foo($arg){}
}
/***
* Those don't work in either 5 or 6
*/
abstract class Abst {
abstract public function foo();
}
class Child2 extends Abst {
public function foo($arg){}
}
interface Int {
public function foo();
}
class Child3 implements Int {
public function foo($arg){}
}
Expected result:
----------------
/***
* Proposal for a solution
*/
abstract class AbstFixed {
abstract public function foo;
}
class Child4 extends AbstFixed {
public function foo($arg){}
}
// => Declaring the method without parenthesis (which currently throws
a parse error) would allow the implementations of this method to use any
argument signature they please.
Actual result:
--------------
At the moment those three examples throw a fatal error in PHP6 with :
Declaration of Child::foo() must be compatible with that of
Parnt::foo()
I don't think it is a bug, but I think having the capability to allow
variable function signatures would definitely be a plus, especially with
PHP6 coming that prevents the first example to work.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=44043&edit=1