[Haskell-cafe] Re: Optimization problem

[Conor McBride]

Robert Dockins wrote:
>
> On Sep 19, 2006, at 8:52 AM, Conor McBride wrote:
>
>> Hi folks
>>
>> apfelmus at quantentunnel.de wrote:
>>> Btw, why are there no irrefutable patterns for GADTs? I mean, such a 
>>> sin
>>> should be shame for a non-strict language...
>>>
>>
>>
>> Just imagine
>>
>> > data Eq a b where Refl :: Eq a a
>>
>> > coerce :: Eq a b -> a -> b
>> > coerce ~Refl a = b
>
>
> I think you mean:
>
> > coerce ~Refl x = x

Indeed I do. My original program was much safer!

Thanks

Conor


This message has been checked for viruses but the contents of an attachment
may still contain software viruses, which could damage your computer system:
you are advised to perform your own checks. Email communications with the
University of Nottingham may be monitored as permitted by UK legislation.