24 Feb
2015
24 Feb
'15
6:13 a.m.
On 24-02-2015 06:42, Erik de Castro Lopo wrote:
Hi all,
We currently have in the Data.Maybe module from base:
fromJust :: Maybe a -> a
which newbies often find using hoogle or other search tools and is a huge trap. *Every* usage of the above can be replaced by using
fromMaybe :: a -> Maybe a -> a
which forces the user to provide a default value for the case where the Maybe a is a Nothing.
The idea would be to deprecate fromMaybe for 7.12 and remove it completely later.
Comments?
How much code on Hackage is currently using fromJust? (A rough estimate by group would probably be sufficient.) Regards,