[project @ 2001-10-25 02:13:10 by sof]

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

diff --git a/ghc/compiler/typecheck/TcType.lhs b/ghc/compiler/typecheck/TcType.lhs
index a62e698..7f4e0df 100644 (file)
--- a/ghc/compiler/typecheck/TcType.lhs
+++ b/ghc/compiler/typecheck/TcType.lhs
@@ -89,7 +89,7 @@ module TcType (
   isPrimitiveType,
 
   tidyTopType, tidyType, tidyPred, tidyTypes, tidyFreeTyVars, tidyOpenType, tidyOpenTypes,
-  tidyTyVar, tidyTyVars,
+  tidyTyVarBndr, tidyOpenTyVar, tidyOpenTyVars,
   typeKind, eqKind, eqUsage,
 
   tyVarsOfType, tyVarsOfTypes, tyVarsOfPred, tyVarsOfTheta
@@ -115,7 +115,7 @@ import Type         (       -- Re-exports
                          isUnLiftedType, isUnboxedTupleType, isPrimitiveType,
                          splitNewType_maybe, splitTyConApp_maybe,
                          tidyTopType, tidyType, tidyPred, tidyTypes, tidyFreeTyVars, tidyOpenType, tidyOpenTypes,
-                         tidyTyVar, tidyTyVars, eqKind, eqUsage,
+                         tidyTyVarBndr, tidyOpenTyVar, tidyOpenTyVars, eqKind, eqUsage,
                          hasMoreBoxityInfo, liftedBoxity, superBoxity, typeKind, superKind
                        )
 import TyCon           ( TyCon, isUnLiftedTyCon )
@@ -130,13 +130,12 @@ import CmdLineOpts        ( DynFlags, DynFlag( Opt_GlasgowExts ), dopt )
 import Name            ( Name, NamedThing(..), mkLocalName )
 import OccName         ( OccName, mkDictOcc )
 import NameSet
-import PrelNames       -- Lots (e.g. in isFFIArgumentTy
+import PrelNames       -- Lots (e.g. in isFFIArgumentTy)
 import TysWiredIn      ( ptrTyCon, funPtrTyCon, addrTyCon, unitTyCon )
 import Unique          ( Unique, Uniquable(..) )
 import SrcLoc          ( SrcLoc )
-import Util            ( cmpList, thenCmp )
+import Util            ( cmpList, thenCmp, equalLength )
 import Maybes          ( maybeToBool, expectJust )
-import BasicTypes      ( Boxity(..) )
 import Outputable
 \end{code}
 
@@ -858,7 +857,7 @@ uTysX (FunTy fun1 arg1) (FunTy fun2 arg2) k subst
 
        -- Type constructors must match
 uTysX (TyConApp con1 tys1) (TyConApp con2 tys2) k subst
-  | (con1 == con2 && length tys1 == length tys2)
+  | (con1 == con2 && equalLength tys1 tys2)
   = uTyListsX tys1 tys2 k subst
 
        -- Applications need a bit of care!