you're missing the `this` argument in the argvec.

(compareAndSet [this oldv newv] ..)

the boolean type hint shoulnd't be necessary.

On Wed, Feb 3, 2016 at 8:18 PM, William la Forge <laforg...@gmail.com> wrote:
> Having a bit of a problem implementing the IAtom interface in a record.
> Specifically, this is the signature giving me grief:
>
> boolean compareAndSet(Object oldv, Object newv);
>
> This isn't the answer:
>
> (^boolean compareAndSet [oldv newv] ... )
>
>
> I get "Can't define method not in interfaces: compareAndSet".
>
> Any ideas? Thanks!
>
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