On 8 September 2011 10:35, Ivan Lazar Miljenovic <ivan.miljeno...@gmail.com> wrote: > On 8 September 2011 12:19, Conrad Parker <con...@metadecks.org> wrote: >> >> given that readAddress can parse the output of showAddress, and >> readSubnet can parse the output of showSubnet, is there any reason not >> to use these for the implementation of Show and Read instances? > > My guess is that since showAddress and readsAddress are class-based, > there might be some defaulting issues if you use them.
well, then remove them from the class interface and just use the Read and Show classes ... > Also, unless > the constructor isn't exported, isn't it usually preferable to have > Show and Read instances produce/use actual values directly? sure, but the roundtripping seems fairly unambiguous here. Conrad. _______________________________________________ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell
