See you at JVMLS
Palo Marton
palo.marton at gmail.com
Tue Aug 18 21:57:27 UTC 2015
One option is to not recreate them, but to compile such construct as
((Bar)f).barMethod(). May be that can work. But reflection will get even
more ugly :(
On ut, 18. aug 2015 at 23:53 Brian Goetz <brian.goetz at oracle.com> wrote:
> Yes, that has to work, though it doesn't currently. On the list...
>
> On 8/18/2015 5:49 PM, Palo Marton wrote:
> > Yes, that's a nice sidestep ;-)
> > My question was meant in a general way, not only about results of
> > instanceof/isAssignableFrom. What about methods of Bar? Will you
> > recreate them in Foo$any? What about eg call to
> > f.barMethod()?
> > On ut, 18. aug 2015 at 23:39 Brian Goetz <brian.goetz at oracle.com
> > <mailto:brian.goetz at oracle.com>> wrote:
> >
> > I'll sidestep your clever question by pointing out that the left
> operand
> > of an instanceof check is an expression, not a type.
> >
> > If you have:
> >
> > Foo<any> f = ...
> >
> > if (f instanceof Bar) { ... }
> >
> > this works just fine, because all instantiations of Foo<T> are
> > represented by classes whose supertype is Bar. The harder question
> is
> > the reflective one (Class.isAssignableFrom.) But reflection is
> still a
> > work in progress (as is the whole thing, of course.)
> >
> > On 8/18/2015 5:30 PM, Palo Marton wrote:
> > > Thanks. I have just watched your talk on Valhalla. Just one
> curious
> > > question on xxx$any interfaces: How do you handle this?
> > >
> > > class Foo<any T> extends Bar { }
> > >
> > > Foo$any instanceof Bar?
> > > On ut, 18. aug 2015 at 19:02 Brian Goetz <brian.goetz at oracle.com
> > <mailto:brian.goetz at oracle.com>
> > > <mailto:brian.goetz at oracle.com <mailto:brian.goetz at oracle.com>>>
> > wrote:
> > >
> > > JVMLS talks up at:
> > > https://www.youtube.com/user/java
> > >
> > >
> > > On 8/8/2015 12:05 PM, Brian Goetz wrote:
> > > > I'll be doing a talk on the path from Model 1 to Model 2
> > (and a
> > > glimpse
> > > > of Model 3) at JVMLS next week. Hope to see some of you
> > there.
> > > Videos
> > > > should go up on the Java YouTube channel fairly quickly
> > after the
> > > > conference.
> > > >
> > > > In the meantime ... I'll just note that we've had 50+
> > messages on the
> > > > various "Model 2" threads and none of them started with "I
> > tried
> > > it out
> > > > and..."
> > > >
> > > > So a reminder ... the most valuable input the community
> > can give
> > > in this
> > > > process is to provide *actual experience reports*. That's
> > the main
> > > > reason we make the significant investment in making the
> > code and
> > > design
> > > > sketches available early -- so that people can actually
> try it
> > > out, and
> > > > help us see the holes that we might have missed.
> > > >
> > > >
> > >
> > > --
> > > Pavol Marton
> >
> > --
> > Pavol Marton
>
--
Pavol Marton
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