Tidy up SigTv

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

diff --git a/compiler/typecheck/TcUnify.lhs b/compiler/typecheck/TcUnify.lhs
index 4fc50b3..31352e1 100644 (file)
--- a/compiler/typecheck/TcUnify.lhs
+++ b/compiler/typecheck/TcUnify.lhs
@@ -899,8 +899,8 @@ uUnfilledVars origin swapped tv1 details1 tv2 details2
     ty1       = mkTyVarTy tv1
     ty2       = mkTyVarTy tv2
 
-    nicer_to_update_tv1 _         (SigTv _) = True
-    nicer_to_update_tv1 (SigTv _) _         = False
+    nicer_to_update_tv1 _     SigTv = True
+    nicer_to_update_tv1 SigTv _     = False
     nicer_to_update_tv1 _         _         = isSystemName (Var.varName tv1)
         -- Try not to update SigTvs; and try to update sys-y type
         -- variables in preference to ones gotten (say) by