Export lists in modules
simonmar at microsoft.com
Tue Feb 28 10:12:11 EST 2006
On 28 February 2006 13:37, Lennart Augustsson wrote:
> John Meacham wrote:
>> I mean, even a for loop in haskell is done as
>> mapM action [0..10]
>> I'd say _most_ uses of lists are deforested away because they are
>> used to express control and dataflow and arn't actually used as
>> persistant structures.
> Yes, they are optimized away when ghc actually works. :) At the
> moment this seems to be broken (try length[1..n] in 6.4.1).
Known bug (well, known since a few weeks ago at least).
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