Re: [Haskell-cafe] Examples of Mutually Recursive Types

On Sun, 26 Oct 2008, Hugo Pacheco wrote:

Hi all, I have been searching for examples of Haskell "real scenarios" that employ mutually recursive datatype definitions. Does anyone know some interesting libraries or structures that I could play with?

http://darcs.haskell.org/wraxml/src/Data/Tree/BranchLeafTag.hs Here Elem uses Tree.T and Tree.T uses Elem. Is this what you are looking for?