frag-1.1: src/AFRPInternals.hs

{- $Id: AFRPInternals.hs,v 1.2 2003/11/10 21:28:58 antony Exp $
******************************************************************************
*                                  A F R P                                   *
*                                                                            *
*       Module:         AFRPInternals                                        *
*       Purpose:        An interface giving access to some of the internal   *
*			details of the AFRP implementation.		     *
*	Authors:	Antony Courtney and Henrik Nilsson		     *
*                                                                            *
*             Copyright (c) Yale University, 2003                            *
*                                                                            *
******************************************************************************
-}

-- This interface is indended to be used when the need arises to break
-- abstraction barriers, e.g. for interfacing AFRP to the real world, for
-- debugging purposes, or the like. Be aware that the internal details
-- may change. Relying on this interface means that your code is not
-- insulated against such changes.

module AFRPInternals (
    Event(..)		-- The event type, its constructors, and instances.
) where

import AFRPEvent


------------------------------------------------------------------------------
-- Extra Event instances
------------------------------------------------------------------------------

instance Show a => Show (Event a) where
    showsPrec _ NoEvent   = showString "NoEvent"
    showsPrec d (Event a) = showParen (d >= 10)
				      (showString "Event " . showsPrec 10 a)