17 Nov
2012
17 Nov
'12
10:06 a.m.
Adding new superclasses breaks a lot of code for little gain for most people. We need a technical solution to this problem first, before we can refactor our type hierarchy.
A technical solution, eh? http://hackage.haskell.org/trac/ghc/wiki/DefaultSuperclassInstances What is the status on this? How hard would this be to implement as a GHC extension? Are there any reasons this should not be baked into, say, Haskell 2014? -- Dan Burton