Fix some "warn-unused-do-bind" warnings where we want to ignore the value

[ghc-base.git] / System / Mem / Weak.hs

diff --git a/System/Mem/Weak.hs b/System/Mem/Weak.hs
index 3903557..208302f 100644 (file)
--- a/System/Mem/Weak.hs
+++ b/System/Mem/Weak.hs
@@ -69,8 +69,6 @@ module System.Mem.Weak (
 
 import Prelude
 
-import Data.Typeable
-
 #ifdef __HUGS__
 import Hugs.Weak
 #endif
@@ -106,7 +104,7 @@ mkWeakPtr key finalizer = mkWeak key key finalizer
 -}
 addFinalizer :: key -> IO () -> IO ()
 addFinalizer key finalizer = do
-   mkWeakPtr key (Just finalizer)      -- throw it away
+   _ <- mkWeakPtr key (Just finalizer) -- throw it away
    return ()
 
 -- | A specialised version of 'mkWeak' where the value is actually a pair
@@ -119,8 +117,6 @@ addFinalizer key finalizer = do
 mkWeakPair :: k -> v -> Maybe (IO ()) -> IO (Weak (k,v))
 mkWeakPair key val finalizer = mkWeak key (key,val) finalizer
 
-#include "Typeable.h"
-INSTANCE_TYPEABLE1(Weak,weakTc,"Weak")
 
 {- $precise