From 3f503bd54678ec9ea611ba81360b573eb745e7b0 Mon Sep 17 00:00:00 2001
From: Herbert Valerio Riedel <hvr@gnu.org>
Date: Sat, 5 Dec 2015 00:29:55 +0100
Subject: Canonicalise Monad instances

---
 haddock-api/src/Haddock/Interface/Rename.hs |  4 ++--
 haddock-api/src/Haddock/Types.hs            | 10 +++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

(limited to 'haddock-api/src')

diff --git a/haddock-api/src/Haddock/Interface/Rename.hs b/haddock-api/src/Haddock/Interface/Rename.hs
index 4804faff..2183d8f2 100644
--- a/haddock-api/src/Haddock/Interface/Rename.hs
+++ b/haddock-api/src/Haddock/Interface/Rename.hs
@@ -91,13 +91,13 @@ newtype RnM a =
 
 instance Monad RnM where
   (>>=) = thenRn
-  return = returnRn
+  return = pure
 
 instance Functor RnM where
   fmap f x = do a <- x; return (f a)
 
 instance Applicative RnM where
-  pure = return
+  pure = returnRn
   (<*>) = ap
 
 returnRn :: a -> RnM a
diff --git a/haddock-api/src/Haddock/Types.hs b/haddock-api/src/Haddock/Types.hs
index 9db11be6..e07f55f1 100644
--- a/haddock-api/src/Haddock/Types.hs
+++ b/haddock-api/src/Haddock/Types.hs
@@ -586,11 +586,11 @@ instance Functor ErrMsgM where
         fmap f (Writer (a, msgs)) = Writer (f a, msgs)
 
 instance Applicative ErrMsgM where
-    pure = return
-    (<*>) = ap
+    pure a = Writer (a, [])
+    (<*>)  = ap
 
 instance Monad ErrMsgM where
-        return a = Writer (a, [])
+        return   = pure
         m >>= k  = Writer $ let
                 (a, w)  = runWriter m
                 (b, w') = runWriter (k a)
@@ -639,11 +639,11 @@ instance Functor ErrMsgGhc where
   fmap f (WriterGhc x) = WriterGhc (fmap (first f) x)
 
 instance Applicative ErrMsgGhc where
-    pure = return
+    pure a = WriterGhc (return (a, []))
     (<*>) = ap
 
 instance Monad ErrMsgGhc where
-  return a = WriterGhc (return (a, []))
+  return = pure
   m >>= k = WriterGhc $ runWriterGhc m >>= \ (a, msgs1) ->
                fmap (second (msgs1 ++)) (runWriterGhc (k a))
 
-- 
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