From: Ian Lynagh <igloo@earth.li>
Date: Thu, 22 Mar 2007 17:01:14 +0000 (+0000)
Subject: Make a Functor (IOEnv m) instance so it satisfies the new Quasi requirements
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=aba08f650f66a7979b7d8e513f8630663f33f4fb;p=ghc-hetmet.git

Make a Functor (IOEnv m) instance so it satisfies the new Quasi requirements
---

diff --git a/compiler/utils/IOEnv.hs b/compiler/utils/IOEnv.hs
index c0277ae..c72347e 100644
--- a/compiler/utils/IOEnv.hs
+++ b/compiler/utils/IOEnv.hs
@@ -47,6 +47,9 @@ instance Monad (IOEnv m) where
   return = returnM
   fail s = failM	-- Ignore the string
 
+instance Functor (IOEnv m) where
+  fmap f (IOEnv m) = IOEnv (\ env -> fmap f (m env))
+
 returnM :: a -> IOEnv env a
 returnM a = IOEnv (\ env -> return a)