Make subeverywhere complain for unknown expressions.

Previously, subeverywhere would silently leave it unmodified.

diff --git a/NormalizeTools.hs b/NormalizeTools.hs
index 400bf88bfa503e12232ef5ddac1ff8868b01c20b..c20c58349491ee5aa75a5fe8348fe1fa4623ca13 100644 (file)
--- a/NormalizeTools.hs
+++ b/NormalizeTools.hs
@@ -142,9 +142,12 @@ subeverywhere trans (Case scrut b t alts) = do
     transalt (con, binders, expr) = do
       expr' <- trans expr
       return (con, binders, expr')
-      
 
-subeverywhere trans expr = return expr
+subeverywhere trans (Var x) = return $ Var x
+subeverywhere trans (Lit x) = return $ Lit x
+subeverywhere trans (Type x) = return $ Type x
+
+subeverywhere trans expr = error $ "NormalizeTools.subeverywhere Unsupported expression: " ++ show expr
 
 -- Apply the given transformation to all expressions, except for direct
 -- arguments of an application