-----------------------------------------------------------------------------
---
+-- |
-- Module : Control.Monad.Reader
-- Copyright : (c) Andy Gill 2001,
-- (c) Oregon Graduate Institute of Science and Technology, 2001
-- Portability : non-portable ( requires mulit-parameter type classes,
-- requires functional dependencies )
--
--- $Id: Reader.hs,v 1.1 2001/06/28 14:15:02 simonmar Exp $
---
-- Declaration of the Monoid class,and instances for list and functions
--
-- Inspired by the paper