X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcHsType.lhs;h=a58761b1affa7cc3388f3f5a8ba6084c11593300;hp=71eb55ed6c07333d8c8da33d12a60716aac5268f;hb=fdf8656855d26105ff36bdd24d41827b05037b91;hpb=a52ff7619e8b7d74a9d933d922eeea49f580bca8

diff --git a/compiler/typecheck/TcHsType.lhs b/compiler/typecheck/TcHsType.lhs
index 71eb55e..a58761b 100644
--- a/compiler/typecheck/TcHsType.lhs
+++ b/compiler/typecheck/TcHsType.lhs
@@ -857,7 +857,7 @@ tcPatSig :: UserTypeCtxt
 		 [(Name, TcType)], -- The new bit of type environment, binding
 				   -- the scoped type variables
                  HsWrapper)        -- Coercion due to unification with actual ty
-		 		   -- Of shape:  res_ty ~ sig_ty
+                                   -- Of shape:  res_ty ~ sig_ty
 tcPatSig ctxt sig res_ty
   = do	{ (sig_tvs, sig_ty) <- tcHsPatSigType ctxt sig
     	-- sig_tvs are the type variables free in 'sig', 
@@ -869,8 +869,7 @@ tcPatSig ctxt sig res_ty
 		-- and hence is rigid, so use it to zap the res_ty
                   wrap <- tcSubType PatSigOrigin ctxt res_ty sig_ty
 		; return (sig_ty, [], wrap)
-
-	} else do {
+        } else do {
 		-- Type signature binds at least one scoped type variable
 	
 		-- A pattern binding cannot bind scoped type variables
@@ -893,20 +892,20 @@ tcPatSig ctxt sig res_ty
 	; checkTc (null bad_tvs) (badPatSigTvs sig_ty bad_tvs)
 
 	-- Now do a subsumption check of the pattern signature against res_ty
-	; sig_tvs' <- tcInstSigTyVars sig_tvs
+        ; sig_tvs' <- tcInstSigTyVars sig_tvs
         ; let sig_ty' = substTyWith sig_tvs sig_tv_tys' sig_ty
               sig_tv_tys' = mkTyVarTys sig_tvs'
-        ; wrap <- tcSubType PatSigOrigin ctxt res_ty sig_ty'
+	; wrap <- tcSubType PatSigOrigin ctxt res_ty sig_ty'
 
 	-- Check that each is bound to a distinct type variable,
 	-- and one that is not already in scope
-	; binds_in_scope <- getScopedTyVarBinds
+        ; binds_in_scope <- getScopedTyVarBinds
 	; let tv_binds = map tyVarName sig_tvs `zip` sig_tv_tys'
 	; check binds_in_scope tv_binds
 	
 	-- Phew!
-	; return (sig_ty', tv_binds, wrap)
-	} }
+        ; return (sig_ty', tv_binds, wrap)
+        } }
   where
     check _ [] = return ()
     check in_scope ((n,ty):rest) = do { check_one in_scope n ty
@@ -917,7 +916,7 @@ tcPatSig ctxt sig res_ty
 		-- Must not bind to the same type variable
 		-- as some other in-scope type variable
 	where
-	  dups = [n' | (n',ty') <- in_scope, tcEqType ty' ty]
+	  dups = [n' | (n',ty') <- in_scope, eqType ty' ty]
 \end{code}