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. This is somewhat strange situation. Was it a design decision? _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
