[Haskell-cafe] What's the deal with Clean?

S. Doaitse Swierstra doaitse at swierstra.net
Thu Nov 5 10:19:49 EST 2009

One of this differences between Haskell and Clean I did not see  
mentioned in this discussion is that Clean does not allow so-called  
partial parametrisation. I.e. all function calls have to be fully  
saturated. Although the GHC can sometimes (often) find out that a call  
is saturated, this becomes more complicated if higher-order functions  
are involved. As a consequence extra tests have to be performed at  
each call, which partially explains the speed difference.

I have no idea how much difference it would make if such tests could  
completely be avoided in Haskell implementations. We hope to to be  
able to say something more about this difference in the future, based  
on the global (GRIN-based) analysis done in the Utrecht Haskell  


On 3 nov 2009, at 21:30, Deniz Dogan wrote:

> Recently there has been a lot of discussion on this list about the
> programming language Clean and converting Clean programs to Haskell.
> Reading the Wikipedia article on the language, I can't really see any
> major difference between that and Haskell, except for the monads vs.
> uniqueness types.
> So what's the deal with Clean? Why is it preferable to Haskell? Why  
> is it not?
> -- 
> Deniz Dogan
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