* Malcolm Wallace <malcolm.wall...@me.com> [2013-04-09 15:34:01+0100] > > On 9 Apr 2013, at 14:46, Sturdy, Ian wrote: > > > As far as the use of Eq goes, Eq is already enshrined in pattern matching > > by pattern matching against literals. > > Not true. Pattern-matching literals explicitly avoids any use of Eq. > Demonstration: > > data Foo = Foo | Bar > instance Eq Foo where > _ == _ = True > > isFoo Foo = True > isFoo Bar = False > > main = do print (isFoo Bar) > print (Foo==Bar)
I think he meant numeric literals. Roman _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
