Edit report at https://bugs.php.net/bug.php?id=62320&edit=1
ID: 62320
Comment by: jon at langevin dot me
Reported by: techlivezheng at gmail dot com
Summary: Abstract static property?
Status: Open
Type: Feature/Change Request
Package: Scripting Engine problem
Operating System: Linux
PHP Version: 5.4.3
Block user comment: N
Private report: N
New Comment:
Very valid issue, please correct. Just because users such as "dagguh" can't
figure out how to make LSB work, that doesn't mean it's a failed concept.
Great feature, it's just missing the needed abstract static functionality.
Previous Comments:
------------------------------------------------------------------------
[2012-10-26 16:06:00] dagguh at gmail dot com
Late Static Binding is a failed concept and should be avoided in all cases.
There is no such thing as static inheritance. Static members of a class belong
to
this class and this class only.
Just use the regular instance methods and regular inheritance.
Your code will be more testable, extensible and modular.
Please close this issue as "won't fix".
------------------------------------------------------------------------
[2012-06-14 07:04:45] techlivezheng at gmail dot com
Description:
------------
As we have "late static bindings" now, would it be reasonable to have a
"abstract static property"?
See the bellow example.
abstract class A {
//If this could be declared as abstract to make
//the subclass have to redeclare it in order to
//have it own $mTest to use.
//If $mTest is not declared in one subclass, it would
//change the $mTest of A which is shared by many
//subclasses, some unexpected things would happen.
//The design is to make each subclass have its own
//$mTest to use and it has to be existed.
//$mTest in A is just for a skeleton purpose, even should
//not be assigned a value.
static $mTest;
static function setTest($value) {
static::$mTest = $value;
}
static function DumpTest () {
echo 'static:' . static::$mTest . "\n";
echo 'A-self:' . self::$mTest . "\n";
}
}
class B extends A {
static function DumpTest () {
parent::DumpTest();
echo 'B-self:' . self::$mTest . "\n";
echo 'B-parent:' . parent::$mTest . "\n";
}
}
class C extends A {
static $mTest;
static function DumpTest () {
parent::DumpTest();
echo 'C-self:' . self::$mTest . "\n";
echo 'C-parent:' . parent::$mTest . "\n";
}
}
class D extends C {
static $mTest;
static function DumpTest () {
parent::DumpTest();
echo 'D-self:' . self::$mTest . "\n";
echo 'D-parent:' . parent::$mTest . "\n";
}
}
B::setTest('test1');//This will change the $mStorages of class A
B::DumpTest();
//static:test1
//A-self:test1
//B-self:test1
//B-parent:test1
C::setTest('test2');
C::DumpTest();
//static:test2
//A-self:test1
//C-self:test2
//C-parent:test1
D::setTest('test3');
D::DumpTest();
static:test3
//A-self:test1
//C-self:test2
//C-parent:test1
//D-self:test3
//D-parent:test2
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=62320&edit=1
