Re: [Haskell] Read Instances for Data.Map and Data.Set

Georg Martius <mai99dgf@studserv.uni-leipzig.de> writes:

I was really annoyed by the fact that for Data.Map and Data.Set are no Read instances declared, but Show instances are! I believe there should be some kind of unwritten rule that in the standart lib the Show and Read instances come pairwise and are fully compatible.

FWIW, earlier versions of Haskell had a single class Text with methods for both showing and reading, so it was harder to ignore their complementary roles. Regards, Malcolm