[Haskell-cafe] GHC.Generics and newtypes
Hi, Is it possible to generate different instances for newtypes and datatypes using GHC.Generics? Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC.Generics and newtypes
Hi Roman, Yes, the automatic derivation of Generic instances does not see through newtypes. Cheers, Pedro On Sun, Jan 27, 2013 at 8:17 PM, Roman Cheplyaka r...@ro-che.info wrote: Hi, Is it possible to generate different instances for newtypes and datatypes using GHC.Generics? Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC.Generics and newtypes
Sorry, I wasn't clear. What I want is somehow to find out whether the type under consideration is declared using data or newtype. Is it possible? Roman * José Pedro Magalhães j...@cs.uu.nl [2013-01-27 20:29:52+] Hi Roman, Yes, the automatic derivation of Generic instances does not see through newtypes. Cheers, Pedro On Sun, Jan 27, 2013 at 8:17 PM, Roman Cheplyaka r...@ro-che.info wrote: Hi, Is it possible to generate different instances for newtypes and datatypes using GHC.Generics? Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC.Generics and newtypes
Ah, no. But that would be easy to add to the Datatype classhttp://hackage.haskell.org/packages/archive/base/4.6.0.0/doc/html/GHC-Generics.html#g:3, I think. Perhaps open a feature request? Cheers, Pedro On Sun, Jan 27, 2013 at 8:34 PM, Roman Cheplyaka r...@ro-che.info wrote: Sorry, I wasn't clear. What I want is somehow to find out whether the type under consideration is declared using data or newtype. Is it possible? Roman * José Pedro Magalhães j...@cs.uu.nl [2013-01-27 20:29:52+] Hi Roman, Yes, the automatic derivation of Generic instances does not see through newtypes. Cheers, Pedro On Sun, Jan 27, 2013 at 8:17 PM, Roman Cheplyaka r...@ro-che.info wrote: Hi, Is it possible to generate different instances for newtypes and datatypes using GHC.Generics? Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC.Generics and newtypes
Sure. Should it go to the GHC bug tracker? Roman * José Pedro Magalhães j...@cs.uu.nl [2013-01-27 20:36:54+] Ah, no. But that would be easy to add to the Datatype classhttp://hackage.haskell.org/packages/archive/base/4.6.0.0/doc/html/GHC-Generics.html#g:3, I think. Perhaps open a feature request? Cheers, Pedro On Sun, Jan 27, 2013 at 8:34 PM, Roman Cheplyaka r...@ro-che.info wrote: Sorry, I wasn't clear. What I want is somehow to find out whether the type under consideration is declared using data or newtype. Is it possible? Roman * José Pedro Magalhães j...@cs.uu.nl [2013-01-27 20:29:52+] Hi Roman, Yes, the automatic derivation of Generic instances does not see through newtypes. Cheers, Pedro On Sun, Jan 27, 2013 at 8:17 PM, Roman Cheplyaka r...@ro-che.info wrote: Hi, Is it possible to generate different instances for newtypes and datatypes using GHC.Generics? Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
