recursive lambda as a local variable

[Dan Smith]

On Sep 11, 2013, at 12:11 PM, Zhong Yu <zhong.j.yu at gmail.com> wrote:

> On Wed, Sep 11, 2013 at 12:36 PM, Dan Smith <daniel.smith at oracle.com> wrote:
>> I'm pretty sure that's just the way things work.
> 
>> Fields can refer to themselves in their initializers;
> 
> This part is kind of messy, for example
> 
> public class Tmp
> {
>    int x = x + 1; // fail. good.
> 
>    int y = this.y +1;  // ok! allowed by JLS#8.3.2.3. probably spec bug.
> 
>    final int z;
> 
>    Tmp()
>    {
>        z = this.z+1; // ok! but forbid by JLS#16. probably javac bug
>    }
> }
> 
> With lambda it is more confusing
> 
> public class Tmp
> {
>    Runnable r1 = ()->r1.run(); // ok
> 
>    Runnable r2 = this.r2::run; // compiles... but
> NullPointerException at runtime
> }
> 
> Zhong Yu

I see it's more complex than I thought.

I will investigate and probably generate a bug or two.

—Dan