Thanks, that works. But how sould I change my class definition, so that it works without (2::Int), but just with 2?
Ross Mellgren wrote: > > You did not specify what type of number it is -- in Haskell numeric > constants like "1" are actually typed as forall a. Num a -- that is, > can be any type of Num. > > Try: plus (2::Int) 3 > > -Ross > > On Nov 9, 2009, at 1:44 PM, Paul Tokarev wrote: > >> >> Hi. >> >> I am using Hugs 98 >> I have that piece of code: >> >> class PlusTimes a where >> plus :: a -> a -> a >> >> instance PlusTimes Int where >> plus x y = x + y >> >> when I run : "plus 2 3" I get this error: >> ERROR - Unresolved overloading >> *** Type : (Num a, PlusTimes a) => a >> *** Expression : plus 2 3 >> >> What am I doing wrong? >> Thanks. >> >> -- >> View this message in context: >> http://old.nabble.com/classes-question-tp26271257p26271257.html >> Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com >> . >> >> _______________________________________________ >> Haskell-Cafe mailing list >> [email protected] >> http://www.haskell.org/mailman/listinfo/haskell-cafe > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe > > -- View this message in context: http://old.nabble.com/classes-question-tp26271257p26274624.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
