rank-2-type standard type constructor class hierarchy; profiling libraries

 A mirror image of the standard type constructor class hierarchy
 rooted in 'Functor', except with methods of rank 2 types and class
 instances of kind (k -> *) -> *. The classes enable generic handling
 of heterogenously typed data structures and other neat tricks.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.