26 Jul
2010
26 Jul
'10
7:04 a.m.
| Data.Map.Map and Data.Set.Set are exported abstractly, without | exposing knowledge about their internal structure. | | I cannot directly create my own class instances for them because of | that. But I found that I can write Template Haskell code that could do | that - those data types could be reified just fine. I've created a ticket for this http://hackage.haskell.org/trac/ghc/ticket/4222. In writing it down I identify several design questions that need to be addressed before we can "fix" this bug. Help welcome. Simon