ID: 47301
User updated by: jevgeni at geimanen dot com
Reported By: jevgeni at geimanen dot com
Status: Bogus
Bug Type: Feature/Change Request
Operating System: Any
PHP Version: 5.3.0beta1
New Comment:
So what you mean is that
$a->intVar = 12
should look like
$a->intVar = new Int32(12);
or smth like that.
But I don't see any problem here (except of one more check before
overwriting the old intVar property).
Here is fixed version of my __setValue magic method proposal:
function __setValue($value) {
if (!is_int($value)) throw new Exception("Type checking...");
return new Int32($value);
}
This will keep major beak untouched.
If we assume that the old "overwriting" algorytm looks like this:
1. overwrite property value with $newValue
Then the new one should look like this:
1. check if old value has magic method.
1.true. overwrite property value with oldValue.__setValue($newValue)
2.false. overwrite property value with $newValue
Does it make any sense now?
Previous Comments:
------------------------------------------------------------------------
[2009-02-06 22:43:35] [email protected]
$a->intVar = 12 is overwriting the old intVar property, keeping the old
value would be a major beak to the way PHP works.
------------------------------------------------------------------------
[2009-02-04 11:00:07] jevgeni at geimanen dot com
Description:
------------
It's a feature request for a new magic method named __setValue (could
be other more suitable name)
There is already magic method named __set, which is called when
inaccessible MEMBER is called. The one I propose should be called when
Object is called, receive the value that this object is being set to,
and return new value. For example:
class Int32 {
function __setValue($value) {
if (!is_int($value)) throw new Exception("Type checking...");
return $value;
}
}
class A {
public $intVar;
public function __construct() {
$this->intVar = new Int32();
}
}
$a = new A();
$a->intVar = 12; //is ok
$a->intVar = "asdf"; //throws exception
That feature would give TONES of new possibilities, type checking is
one of them.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=47301&edit=1
