On 02/03/2010 17:45, Yitzchak Gale wrote:
Jeremy Shaw wrote:
I would still vote for that error in the 'worst ghc error message
contest'...
Simon Marlow wrote:
Oh, the problem here is that... when we got around
to trying to import it we found that it was not loaded.
Perhaps the implicit
On 03/03/2010 12:37, Yitzchak Gale wrote:
Jeremy Shaw wrote:
I would still vote for that error in the 'worst ghc error message
contest'...
I wrote:
Can't we add something like (Is there more than one
Prelude in your path?) to the message for Prelude?
Simon Marlow wrote:
So I could add a
I wrote:
I was suggesting that whenever the Prelude fails to load,
the error message should contain that hint.
hmm, I'll think about that. Is it not enough to see a compilation error
pointing to the file Prelude.hs?
Seems obvious in the context of this thread. But not being in
the middle of
Hi All,
I am optimizing a program to consume less memory.
If I profile it with +RTS -hd, it reports to fill 50% of my memory with
stg-ap-1-upd-info.
Does this mean anything?
Regards,
Robert
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I think it means you're created lots of thunks of the form (f x).
Perhaps some foldl vs foldl' issue? If you're not using foldl
anywhere, look at tail recursive functions and try and make their
accumulators strict.
HTH
On 3 March 2010 16:11, Herk, Robert van robert.van.h...@philips.com wrote:
The following code
{-# LANGUAGE FlexibleInstances, TypeFamilies #-}
import Control.Applicative
class Z t where
type W t
z :: t - W t
instance Z (a - b) where
type W (a - b) = a - b
z = id
instance Z (IO (a - b)) where
type W (IO (a - b)) = IO a - IO b
On March 3, 2010 18:35:26 Daniel Fischer wrote:
Because:
instance Applicative ((-) a) -- Defined in Control.Applicative
so, from the instance Z (a - b), with b == c - d, we have an
instance Z (a - (b - c))
and from instance Z (m (u - v)), we have, with m == ((-) x), an
instance Z (x -
Am Donnerstag 04 März 2010 02:39:30 schrieb Tyson Whitehead:
On March 3, 2010 18:35:26 Daniel Fischer wrote:
Because:
instance Applicative ((-) a) -- Defined in Control.Applicative
so, from the instance Z (a - b), with b == c - d, we have an
instance Z (a - (b - c))
and from
