From: Anders Mörtberg <andersmortberg@gmail.com>
Date: Thu, 8 Jun 2017 07:46:27 +0000 (+0200)
Subject: Check if some names were shadowed while loading the file
X-Git-Url: https://git.ak3n.com/?a=commitdiff_plain;h=71a86bdf12e889b31bdec2cbb6822c18214485f7;p=cubicaltt.git

Check if some names were shadowed while loading the file
---

diff --git a/Main.hs b/Main.hs
index c41c03e..fba67a9 100644
--- a/Main.hs
+++ b/Main.hs
@@ -98,10 +98,19 @@ initLoop flags f hist = do
       putStrLn $ "Resolver failed: " ++ err
       runInputT (settings []) (putHistory hist >> loop flags f [] TC.verboseEnv)
     Right (adefs,names) -> do
+
       (merr,tenv) <- TC.runDeclss TC.verboseEnv adefs
       case merr of
         Just err -> putStrLn $ "Type checking failed: " ++ shrink err
-        Nothing  -> putStrLn "File loaded."
+        Nothing  -> do
+          putStrLn "File loaded."
+          -- After loading the file check if some definitions were shadowed:
+          let ns = map fst names
+              uns = nub ns
+              dups = ns \\ uns
+          unless (dups == []) $
+            putStrLn $ "Warning: the following definitions were shadowed [" ++
+                        intercalate ", " dups ++ "]"
       if Batch `elem` flags
         then return ()
         else -- Compute names for auto completion