X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FcoreSyn%2FExternalCore.lhs;h=d8eaa3ca6f6f0d90f6e46352daa67c5568dbf1b9;hb=5244158455f546d07632e48c718a771a8f2145a3;hp=a326a54a6cdba213f42ddfeb5084e19b64a71666;hpb=e4417dcd4679da9c6b18c02ff667199c572bed89;p=ghc-hetmet.git

diff --git a/compiler/coreSyn/ExternalCore.lhs b/compiler/coreSyn/ExternalCore.lhs
index a326a54..d8eaa3c 100644
--- a/compiler/coreSyn/ExternalCore.lhs
+++ b/compiler/coreSyn/ExternalCore.lhs
@@ -56,6 +56,16 @@ data Ty
   | Tcon (Qual Tcon)
   | Tapp Ty Ty
   | Tforall Tbind Ty 
+-- We distinguish primitive coercions
+-- (represented in GHC by wired-in names), because
+-- External Core treats them specially, so we have
+-- to print them out with special syntax.
+  | TransCoercion Ty Ty
+  | SymCoercion Ty
+  | UnsafeCoercion Ty Ty
+  | InstCoercion Ty Ty
+  | LeftCoercion Ty
+  | RightCoercion Ty
 
 data Kind 
   = Klifted