Type checking for type synonym families

[ghc-hetmet.git] / compiler / typecheck / TcUnify.lhs-boot

diff --git a/compiler/typecheck/TcUnify.lhs-boot b/compiler/typecheck/TcUnify.lhs-boot
index b39573e..4d385b1 100644 (file)
--- a/compiler/typecheck/TcUnify.lhs-boot
+++ b/compiler/typecheck/TcUnify.lhs-boot
@@ -1,11 +1,13 @@
 \begin{code}
 module TcUnify where
-import TcType  ( TcTauType, BoxySigmaType )
+import TcType  ( TcTauType, BoxySigmaType, BoxyType )
 import TcRnTypes( TcM )
+import Coercion (CoercionI)
 
 -- This boot file exists only to tie the knot between
 --             TcUnify and TcSimplify
 
-unifyType :: TcTauType -> TcTauType -> TcM ()
+unifyType :: TcTauType -> TcTauType -> TcM CoercionI
+boxyUnify :: BoxyType -> BoxyType -> TcM CoercionI
 zapToMonotype :: BoxySigmaType -> TcM TcTauType
 \end{code}