Hi, With Prelude.catch, I could write "catch () $ \_ -> return Nothing". But with Control.Exception.catch, I must specify a type for the "_". What should I do?
PS: In Java document, a function declaration would tell us both the incoming args and outgoing, AND what exceptions would it throw. But it does not seem to exist in Haskell document? And the most awful part is that even when the program failed with error message, I still did not know what exception was this. Take "recv: does not exist (Connection refused)" for example. -- 竹密岂妨流水过 山高哪阻野云飞 _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
