hg: lambda/lambda/jdk: Update initial lambda APIs and tests to use new syntax.

[Rémi Forax]

On 09/12/2011 06:19 PM, Neal Gafter wrote:
> On Mon, Sep 12, 2011 at 8:28 AM, Colin Decker <cgdecker at gmail.com 
> <mailto:cgdecker at gmail.com>> wrote:
>
>     On Sun, Sep 11, 2011 at 7:52 AM, Rémi Forax <forax at univ-mlv.fr
>     <mailto:forax at univ-mlv.fr>> wrote:
>     >
>     > - some casts are wrong, you can't  cast a Predicate<? super T> to
>     >   a Predicate<T>, it's not safe.
>     >
>
>     What isn't safe about it?
>
>
> Among other things, it is wrong (in the sense that you may be casting 
> something to a type that it isn't).  Adding this sort of broken code 
> to the JDK, and encouraging other people to write such code, will be 
> an impediment to ever reifying generics in the future.  (If generics 
> were reified, the cast would fail).

And since we now have invokedynamic, reified generics are not far away :)

Rémi