1 files changed, 8 insertions, 1 deletions

diff --git a/IntMapClass.hs b/IntMapClass.hs
index 9ab83db..28ae5ba 100644
--- a/IntMapClass.hs
+++ b/IntMapClass.hs
@@ -51,6 +51,8 @@ adapt_m_m f m = adapt_m (adapt_m f m)
 adapt_m :: (IntMap a -> x) -> IMap k a -> x
 adapt_m f (IMap m) = f m
 
+first f (x,y) = (f x,y)
+
 
 (!) :: Coercible k Int => IMap k a -> k -> a
 (!) = adapt_m_k (IntMap.!)
@@ -75,4 +77,9 @@ findWithDefault a = adapt_k_m (IntMap.findWithDefault a)
 
 lookupLT :: ( Coercible Int k, Coercible k Int ) => k -> IMap k a -> Maybe (k, a)
 lookupLT k m = fmap (first coerce) $ adapt_k_m (IntMap.lookupLT) k m
-               where first f (x,y) = (f x,y)
+lookupGT :: ( Coercible Int k, Coercible k Int ) => k -> IMap k a -> Maybe (k, a)
+lookupGT k m = fmap (first coerce) $ adapt_k_m (IntMap.lookupGT) k m
+lookupLE :: ( Coercible Int k, Coercible k Int ) => k -> IMap k a -> Maybe (k, a)
+lookupLE k m = fmap (first coerce) $ adapt_k_m (IntMap.lookupLE) k m
+lookupGE :: ( Coercible Int k, Coercible k Int ) => k -> IMap k a -> Maybe (k, a)
+lookupGE k m = fmap (first coerce) $ adapt_k_m (IntMap.lookupGE) k m