recurseively reify template haskell datatype info; documentation

  This package provides functions for recursively reifying top
 level declarations. The main intended use case is for enumerating
 the names of datatypes reachable from an initial datatype, and
 passing these names to some function which generates instances.
  .
  This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.