genericLength is extremely inefficient for typical numeric types. Int is a rather sad type for these things; it really should be Word. But that may not be worth fixing. On Tue, Nov 13, 2018, 9:51 PM Evan Laforge <qdunkan@gmail.com wrote:
You can already get these as Data.List.genericLength and Data.List.genericReplicate
As for changing the prelude ones, this would probably cause a lot of busywork. Where I work we compile with -Werror and -Wtype-defaults, so a lot of places might have to get type annotations. On Tue, Nov 13, 2018 at 5:19 PM Vanessa McHale <vanessa.mchale@iohk.io> wrote:
Would it be possible to generalize replicate and length to have type signatures
replicate :: Integral a => a -> b -> [b]
and
length :: (Integral a, Foldable t) => t b -> a
?
There have been a few instances where such a thing would have been useful to me.
Cheers
_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries
_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries