Loop handle?

[Emmanuel Castro]

Maybe there is no need to have a special handle for loops if there is an
(hidden?) support for tail call in method handles ;-)
I remind me a blog page from John Rose:
http://blogs.sun.com/jrose/entry/tailcalls_meet_invokedynamic

There is questioning about putting coroutine in Java7. Will Java7 include
the tail-call patch? I am not sure that it is compatible with the indy
patch. Is there a plan to make it compatible?

- Emmanuel

2010/4/9 Charles Oliver Nutter <headius at headius.com>

>
>
> It occurred to me today I may have never asked about this, but why is
> there no looping handle? (or have I missed something?)
>
> loopHandle(MethodHandle condition, MethodHandle body)
>
> In the current set of handles, I don't believe there's a way to
> construct a loop, since you can only link handles upwards from a
> target (i.e. there's no way to construct a handle to jump back to the
> condition again).
>
> Have I missed an obvious detail, or is this a gap in the set of handles?
>
> I ask because I still have a perverse desire to follow up on an idea
> John Rose gave me to implement JRuby's interpreter entirely with
> MethodHandles...with the obvious result being that by simply composing
> a set of handles they'll already be compiled to native code for me :)
>
> - Charlie
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