[project @ 2003-10-21 12:54:17 by simonpj]

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

diff --git a/ghc/compiler/typecheck/TcType.lhs b/ghc/compiler/typecheck/TcType.lhs
index 3a10ed1..45f662b 100644 (file)
--- a/ghc/compiler/typecheck/TcType.lhs
+++ b/ghc/compiler/typecheck/TcType.lhs
@@ -86,7 +86,7 @@ module TcType (
   Kind,        -- Stuff to do with kinds is insensitive to pre/post Tc
   unliftedTypeKind, liftedTypeKind, openTypeKind, mkArrowKind, mkArrowKinds, 
   superBoxity, liftedBoxity, hasMoreBoxityInfo, defaultKind, superKind,
-  isTypeKind, isAnyTypeKind,
+  isTypeKind, isAnyTypeKind, typeCon,
 
   Type, PredType(..), ThetaType, 
   mkForAllTy, mkForAllTys, 
@@ -117,7 +117,7 @@ import TypeRep              ( Type(..), TyNote(..), funTyCon )  -- friend
 import Type            (       -- Re-exports
                          tyVarsOfType, tyVarsOfTypes, tyVarsOfPred,
                          tyVarsOfTheta, Kind, Type, PredType(..),
-                         ThetaType, unliftedTypeKind,
+                         ThetaType, unliftedTypeKind, typeCon,
                          liftedTypeKind, openTypeKind, mkArrowKind,
                          mkArrowKinds, mkForAllTy, mkForAllTys,
                          defaultKind, isTypeKind, isAnyTypeKind,
@@ -241,6 +241,10 @@ data TyVarDetails
 
    | InstTv    -- Ditto, but instance decl
 
+   | PatSigTv  -- Scoped type variable, introduced by a pattern
+               -- type signature
+               --      \ x::a -> e
+
    | VanillaTv -- Everything else
 
 isUserTyVar :: TcTyVar -> Bool -- Avoid unifying these if possible
@@ -266,6 +270,7 @@ tyVarBindingInfo tv
     details SigTv     = ptext SLIT("type signature")
     details ClsTv     = ptext SLIT("class declaration")
     details InstTv    = ptext SLIT("instance declaration")
+    details PatSigTv  = ptext SLIT("pattern type signature")
     details VanillaTv = ptext SLIT("//vanilla//")      -- Ditto
 \end{code}