On Sun, Oct 2, 2011 at 6:04 AM, Du Xi <sdiy...@sjtu.edu.cn> wrote: > --Is it possible to get around this and write the "expand" function? Of > course, x and y may be of different types >
Not as written, but try HList. http://hackage.haskell.org/package/HList
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe