Oops, I was hiding the Prelude's pi. My apologies. -----Original Message----- From: Deniz Dogan [mailto:deniz.a.m.do...@gmail.com] Sent: Fri 5/29/2009 5:01 PM To: Paul Keir Cc: haskell-cafe@haskell.org Subject: Re: [Haskell-cafe] Floating instance and pi[MESSAGE NOT SCANNED] 2009/5/29 Paul Keir <pk...@dcs.gla.ac.uk>: > Hi, > > I'd like to make my ADT an instance of the Floating class, > but I'm not sure what to put for pi, and GHC gives a warning > without it: > > Warning: No explicit method nor default method for `GHC.Float.pi' > > I tried setting it to undefined, but that gives an error: > > `pi' is not a (visible) method of class `Floating' > > Any idea? > > Paul
Are you sure that your ADT fits into the Floating class in the first place? I reckon if it did, defining "pi" for it wouldn't be a problem. Could you show us the code you have? -- Deniz Dogan
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