Keean, thank you.
Does any tests/benchmarks available?
Regards,
/Alexandre.
On Mar 25, 2005, at 00:47, Keean Schupke wrote:
Think this should really go to glasgow-haskell-users...
If this is true - how do I get ghc to use C--, and is it really faster
than using gcc as a backend with all the bells
Hi all,
I need to use duplicate instances. I read in the documentation on GHC
6.4, that overlapping class instances checks are lazy instead of gready
in 6.4. However, my code still gives duplicate instance errors when
compiling in GHC 6.4.
Is the duplicate instance check still gready? Is there
Hallo!
The ghc user guide says that there are 4 states a heap object may be in.
Unfortunately in my program there are 5 states (inherent_use, use, drag,
lag, void) with inherent_use being the biggest part (many MBs) and the one
not mentioned in the users guide.
My question is what does it mean?
Robert van Herk wrote:
Hi all,
I need to use duplicate instances. I read in the documentation on GHC
6.4, that overlapping class instances checks are lazy instead of
gready in 6.4. However, my code still gives duplicate instance errors
when compiling in GHC 6.4.
Is the duplicate instance check
Keean Schupke wrote:
Robert van Herk wrote:
Hi all,
I need to use duplicate instances. I read in the documentation on GHC
6.4, that overlapping class instances checks are lazy instead of
gready in 6.4. However, my code still gives duplicate instance errors
when compiling in GHC 6.4.
Is the
Keean Schupke wrote:
Robert van Herk wrote:
Hi all,
I need to use duplicate instances. I read in the documentation on GHC
6.4, that overlapping class instances checks are lazy instead of
gready in 6.4. However, my code still gives duplicate instance errors
when compiling in GHC 6.4.
Is the
There was a typo in the code I posted:
class Fail
data This_should_never_happen
should read:
class Fail x
data This_should_never_happen
Keean.
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Just thought I ought to point out that all this is only necessary if the
datasources may return different types... If you want them to return the
same type you only need:
instance (Datasource l k v,Datasource r k v) = Datasource (JoinedDS l
r) k v ...
As both datasources have the same key and
Keean Schupke wrote:
Just thought I ought to point out that all this is only necessary if
the datasources may return different types... If you want them to
return the same type you only need:
instance (Datasource l k v,Datasource r k v) = Datasource (JoinedDS l
r) k v ...
As both datasources
Robert van Herk wrote:
Keean Schupke wrote:
Just thought I ought to point out that all this is only necessary if
the datasources may return different types... If you want them to
return the same type you only need:
instance (Datasource l k v,Datasource r k v) = Datasource (JoinedDS
l r) k v
Simon Peyton-Jones wrote:
|
| class Functor f where fmap :: ...
| class Functor m = Monad m where
| ...the usual stuff...
| fmap = liftM
|
It seems overkill to have a whole new language feature to deal with one
library issue.
Perhaps it is...
For example, what if
Hallo!
Does anybody have some profiling strategies other than from the ghc user
guide?
Any references, suggestions and so on are very welcome.
Thanks,
Andreas
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Still on the same subject, I solved one problem but don't really
understand why it didn't work in the first place ! Although it seems to
be a difference between newtype and data !
I have a newtype defined as :
data Fct s a = Fct (s - [a])
and a function defined by :
plus :: Fct a b - Fct a b -
On Fri, Mar 25, 2005 at 03:13:48PM +0100, Pierre Barbier de Reuille wrote:
plus :: Fct a b - Fct a b - Fct a b
plus (Fct f1) (Fct f2) = Fct ( \ a - (f1 a) ++ (f2 a) )
For some reason, this function does not use leazy evaluation ! I can
test it using :
test_fct :: Fct Int Int
test_fct =
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