Named lambdas (was Re: Serialization stability and naming (and syntax))

[Brian Goetz]

> Okay, so the benefits of user-provided names seem to be
> 
> - More readable toString and stack traces than the auto-provided name (lambda#8 or whatever)
> - A very small (as noted by Brian) potential to make serialization usable across code changes in a few more situations
> - It should apparently help hot-swapping to be usable in a few more situations
> 
> Anything else?

Even more indirectly, potentially useful for recursive lambdas (not in 8) or nonlocal returns (not in 8).