[Haskell-cafe] what is f=f (not) doing ?

[Lennart Augustsson]

I agree.  This situation is totally detectable.

On 9/23/07, Neil Mitchell <ndmitchell at gmail.com> wrote:
>
> Hi
>
> > I'm not sure, but since it would require the detection of an evaluation
> > that does not terminate,  it comes down to the halting problem, which is
> > not generally solvable. Maybe the experts can confirm my intuition?
>
> I think your intuition is off. This isn't the problem of detecting
> that a computation might not halt, its a question of detecting after
> the fact a very restricted case of non-termination has occurred. I
> think it should be possible to assign threads etc to these things, but
> may make the code run slower in the common case.
>
> Thanks
>
> Neil
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