External Core lib: lots of cleanup

[ghc-hetmet.git] / utils / ext-core / Language / Core / Printer.hs

diff --git a/utils/ext-core/Language/Core/Printer.hs b/utils/ext-core/Language/Core/Printer.hs
index bbd8e48..d7c4cdb 100644 (file)
--- a/utils/ext-core/Language/Core/Printer.hs
+++ b/utils/ext-core/Language/Core/Printer.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS -Werror -Wall -fno-warn-missing-signatures #-}
+{-# OPTIONS -Wall -fno-warn-missing-signatures #-}
 
 module Language.Core.Printer where
 
@@ -35,6 +35,11 @@ instance Show Ty where
 instance Show Kind where
   showsPrec _ k = shows (pkind k)
 
+instance Show CoercionKind where
+  showsPrec _ (DefinedCoercion tbs (from,to)) =
+    shows $ parens (text "defined coercion:" <+> (hsep (map ptbind tbs))
+            <+> text ":" <+> brackets (pty from)
+            <+> text "->" <+> brackets (pty to))
 instance Show Lit where
   showsPrec _ l = shows (plit l)