--- In flexcoders@yahoogroups.com, "Sonja Duijvesteijn"
<[EMAIL PROTECTED]> wrote:
>
> Hi all,
>
> I'm trying to make a singleton class as demonstrated below, but
get the
> error: "a constructor may only be declared 'public'". Well, that
error is
> clear, the reason for it is not however.
> Isn't it possible anymore to make a singleton class, or is there
another
> method for it?
>
> Class Singleton {
>
> private static var _instance:Singleton = null;
>
> private function Sinleton() {
> }
>
> public static function getInstance():Singleton {
> if(Singleton._instance == null) {
> _instance = new Singleton();
> }
> return _instance;
> }
>
> }
>
> Any help would be much appreciated.
>
> Kind regards,
> Sonja Duijvesteijn
>
Hi
Have anyone tried using a construction like the following?
public class Singleton
{
public static const Instance:Singleton = new Singleton();
function Singleton()
{
}
public function doSomething():void
{
}
}
This is actually the recommandations of creating a singleton in c#,
and it seems that it fullfils the job here as well.
I know that, if you use flexbuilder 2 beta, then you'll get a
warning if you leave out the scope of the constructor, but maybe
it's worth it.
By the way, be aware that the singleton posted initially as an
example is not a recommended way of creating a singleton, i guess
it's not a problem in AS3, but lazy loaded singletons must have a
syncronized/looked load section when thread safety is an issue.
BR Casper
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