merge up to ghc HEAD 16-Apr-2011

[ghc-hetmet.git] / distrib / compare / Utils.hs

diff --git a/distrib/compare/Utils.hs b/distrib/compare/Utils.hs
index 58298c1..e2da6b5 100644 (file)
--- a/distrib/compare/Utils.hs
+++ b/distrib/compare/Utils.hs
@@ -1,6 +1,8 @@
 
 module Utils where
 
+import Data.Function
+import Data.List
 import System.Exit
 import System.IO
 import Text.Regex.Posix
@@ -26,3 +28,13 @@ re r str = case matchM r' str :: Maybe (String, String, String, [String]) of
            Nothing -> Nothing
     where r' = makeRegex r :: Regex
 
+unSepList :: Eq a => a -> [a] -> [[a]]
+unSepList x xs = case break (x ==) xs of
+                 (this, _ : xs') ->
+                     this : unSepList x xs'
+                 (this, []) ->
+                     [this]
+
+sortByFst :: Ord a => [(a, b)] -> [(a, b)]
+sortByFst = sortBy (compare `on` fst)
+