On Mon, Nov 16, 2015 at 6:07 AM, Harbs <harbs.li...@gmail.com> wrote:
> It would actually be very nice if there was some way to (optionally)
> prevent null being passed into constructors and function calls. There has
> been more than once that I would have liked to have that feature.
>
> I wonder if that’s something we can add to Falcon?
>
It could be done but there would have to be some kind of config either in
the compiler args or @param tag like @param arg0 !null Foo desc, or
metadata tag with param names for not null params.
The AST has the null identifier and you can tell if it's being passed in a
Function/Method call at compile time.
Mike
>
> On Nov 16, 2015, at 12:43 PM, Michael Schmalle <teotigraphix...@gmail.com>
> wrote:
>
> > On Mon, Nov 16, 2015 at 5:40 AM, OmPrakash Muppirala <
> bigosma...@gmail.com>
> > wrote:
> >
> >> Nope, you can still call new Singleton(null) and the compiler won't say
> >> anything :-)
> >> The 'enforcer' is required because of this loophole.
> >>
> >>
> > Yeah, you're right, to early in the morning.. :)
> >
> >
> >> Thanks,
> >> Om
> >>
> >> On Mon, Nov 16, 2015 at 2:36 AM, Michael Schmalle <
> >> teotigraphix...@gmail.com
> >>> wrote:
> >>
> >>> On Mon, Nov 16, 2015 at 4:14 AM, OmPrakash Muppirala <
> >> bigosma...@gmail.com
> >>>>
> >>> wrote:
> >>>
> >>>> Purely pedantic, but the code does not do anything to 'enforce' the
> >>>> singleton-ness of the class.
> >>>>
> >>>
> >>> The compiler won't even let you compile this code, so the != is just
> >> sauce
> >>> that never gets eaten. Since you have to pass an instance of
> >>> SingletonEnforcer, it's private and the compiler will bitch.
> >>>
> >>> Mike.
> >>>
> >>>
> >>>>
> >>>> It should actually be:
> >>>> public function Singleton(e:SingletonEnforcer){
> >>>> if(e != null)
> >>>> {
> >>>> trace("new instance of singleton created");
> >>>> }
> >>>> }
> >>>>
> >>>> On Mon, Nov 16, 2015 at 12:54 AM, yishayw <yishayj...@hotmail.com>
> >>> wrote:
> >>>>
> >>>>> Actually the comment above 'class SingletonEnforcer' explains it.
> >>>>>
> >>>>> package{
> >>>>> public class Singleton{
> >>>>> private static var _instance:Singleton=null;
> >>>>> public function Singleton(e:SingletonEnforcer){
> >>>>> trace("new instance of singleton created");
> >>>>> }
> >>>>> public static function getInstance():Singleton{
> >>>>> if(_instance==null){
> >>>>> _instance=new Singleton(new SingletonEnforcer());
> >>>>> }
> >>>>> return _instance;
> >>>>> }
> >>>>> }
> >>>>> }
> >>>>> //I’m outside the package so I can only be accessed internally
> >>>>> class SingletonEnforcer{
> >>>>> //nothing else required here
> >>>>> }
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> View this message in context:
> >>>>>
> >>>>
> >>>
> >>
> http://apache-flex-development.2333347.n4.nabble.com/FlexJS-FalconJX-Internal-Classes-tp50091p50102.html
> >>>>> Sent from the Apache Flex Development mailing list archive at
> >>> Nabble.com.
> >>>>>
> >>>>
> >>>
> >>
>
>
