Re: [Haskell-cafe] The Read Class
Yes pleaseI wold like some examples (no importance how interesting) Maybe i can work my way from there.On 28 Oct 2006, at 23:32, Daniel Fischer wrote:Hi,probably the best way is to write a parser using ReadP/ReadPrec and theninstance Read SomeType where readPrec = yourParserIf you wish, I could send you a few examples (not very interesting, but they might help getting you going).Cheers,DanielAm Samstag, 28. Oktober 2006 23:49 schrieb Tiago Veloso: Hi,I am trying to find out how to work with the Read Class for a schoolproject, i need to declare instances of Read for a few data types.My problem is that i do not know how to do it, i mean i do not knowhow to build a Read instance, i do know about it for the Show Class.Can some one help?ThanksTiago Veloso Tiago Veloso ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] The Read Class
Hi, probably the best way is to write a parser using ReadP/ReadPrec and then instance Read SomeType where readPrec = yourParser If you wish, I could send you a few examples (not very interesting, but they might help getting you going). Cheers, Daniel Am Samstag, 28. Oktober 2006 23:49 schrieb Tiago Veloso: Hi, I am trying to find out how to work with the Read Class for a school project, i need to declare instances of Read for a few data types. My problem is that i do not know how to do it, i mean i do not know how to build a Read instance, i do know about it for the Show Class. Can some one help? Thanks Tiago Veloso ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] The Read Class
Tiago Veloso wrote: I am trying to find out how to work with the Read Class for a school project, i need to declare instances of Read for a few data types. My problem is that i do not know how to do it, i mean i do not know how to build a Read instance, i do know about it for the Show Class. if you run ghc with -ddump-deriv, you will see the instances that get generated when you use derive. Cheers, Misha ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
