It calls Language.superGetter
static public function superGetter(clazz:Object, pthis:Object,
prop:String):Object
{
var superClass:Object = clazz.superClass_;
var superdesc:Object =
Object.getOwnPropertyDescriptor(superClass,
prop);
while (superdesc == null)
{
superClass = superClass.constructor;
superClass = superClass.superClass_;
superdesc =
Object.getOwnPropertyDescriptor(superClass, prop);
}
return superdesc.get.call(pthis);
}
The problem is that if the base class has both a getter and a setter and
the subclass only defines an override of a setter, you can't just
Object.defineProperty a setter on the subclass. You must also define a
function for the getter that calls the base class getter. But, the base
class may not actually have a getter, the getter may actually be defined
on some class further up the chain of base classes. So,
Language.superGetter and superSetter try to look up the function to call
at runtime.
If we are sure we can compute the function to call at compile time, we
might be able to avoid the runtime lookup.
-Alex
On 4/26/16, 6:04 AM, "Harbs" <harbs.li...@gmail.com> wrote:
>What’s the Javascript output in this case?
>
>On Apr 25, 2016, at 6:02 PM, Alex Harui <aha...@adobe.com> wrote:
>
>> Do you have a better way to do it?
>>
>> -Alex
>>
>> On 4/25/16, 1:46 AM, "lizhi" <s...@qq.com> wrote:
>>
>>> just see
>>>
>>>https://github.com/matrix3d/spriteflexjs/blob/master/test/src/SuperTest.
>>>as
>>>
>>> and see the s1.as s2.as s3.as s4.as
>>>
>>> thanks.
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>>
>>>http://apache-flex-development.2333347.n4.nabble.com/superGetter-very-ve
>>>ry
>>> -slow-tp52574.html
>>> Sent from the Apache Flex Development mailing list archive at
>>>Nabble.com.
>>
>
