[Haskell-cafe] What's the deal with Clean?
dagit at codersbase.com
Fri Nov 6 01:14:49 EST 2009
On Thu, Nov 5, 2009 at 6:15 PM, brian <briand at aracnet.com> wrote:
> On Nov 5, 2009, at 8:26 AM, Jason Dagit wrote:
>> Haskell knows when I have a list of Doubles, you know, because it's
>> strongly typed.
>> Then it proceeds to box them. Huh ?
>> Imagine a computation which will yield a Double if evaluated, but has not
>> yet been evaluated. How do you store that in the list?
> So laziness is causing the boxing to be necessary ?
"Necessary" is a strong word within formal/mathematical communities. If you
mean it in that sense, then I'm not sure it's necessary. My (incomplete)
understanding is that no one has a better way than boxing that has as wide
applicability as boxing. Perhaps there are techniques that work better. My
guess is that they are either 1) special cases; or 2) have yet to be
discovered. I wonder if perhaps supercompilation or perhaps whole program
optimizations will eventually be able to eliminate much of the boxing we
have today. Strictness analysis has done a lot to remove boxing but it is
not perfect due to the halting problem.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Haskell-Cafe