recursive lambdas

[Brian Goetz]

We decided to disallow this form for the time being, in part to simplify 
the metafactory protocol and therefore increase the chance of 
intrinsification of lambda capture sites.

On 9/24/2012 10:01 AM, Aleksey Shipilev wrote:
> Hi guys,
>
> What is our current stance on recursive lambdas? I.e. should this code
> considered to be correct?
>
>      public static IntUnaryOperator fib =
>         (n) -> (n < 2) ? 1 : fib.operate(n - 1) + fib.operate(n - 2);
>
> The current EDR spec says nothing about this, except for "Remove support
> for recursive lambdas" in the changelog, but both latest public b56 and
> the nightly binary builds of lambda/lambda forest in OpenJDK do accept
> this as the correct code.
>
> The reason I ask is that I keep bugging IDEA guys about their lambda
> support, fixing a bug here, there, and everywhere, as this helps people
> to start hacking on lambdas and provide the useful feedback:
>     http://youtrack.jetbrains.com/issue/IDEA-91986
>
> I think everyone realizes the spec is in flux, but it is important to
> understand what are we leaning towards.
>
> Thanks,
> Aleksey
>