Get of fam inst index in ifaces

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

diff --git a/compiler/typecheck/TcEnv.lhs b/compiler/typecheck/TcEnv.lhs
index 1d093e2..7828394 100644 (file)
--- a/compiler/typecheck/TcEnv.lhs
+++ b/compiler/typecheck/TcEnv.lhs
@@ -38,7 +38,7 @@ module TcEnv(
        topIdLvl, 
 
        -- New Ids
-       newLocalName, newDFunName
+       newLocalName, newDFunName, newFamInstTyConName
   ) where
 
 #include "HsVersions.h"
@@ -66,11 +66,13 @@ import InstEnv              ( Instance, DFunId, instanceDFunId, instanceHead )
 import DataCon         ( DataCon )
 import TyCon           ( TyCon )
 import Class           ( Class )
-import Name            ( Name, NamedThing(..), getSrcLoc, nameModule )
+import Name            ( Name, NamedThing(..), getSrcLoc, nameModule,
+                         nameOccName )
 import PrelNames       ( thFAKE )
 import NameEnv
-import OccName         ( mkDFunOcc, occNameString )
-import HscTypes                ( extendTypeEnvList, lookupType, TyThing(..), ExternalPackageState(..) )
+import OccName         ( mkDFunOcc, occNameString, mkInstTyTcOcc )
+import HscTypes                ( extendTypeEnvList, lookupType, TyThing(..),
+                         ExternalPackageState(..) )
 import SrcLoc          ( SrcLoc, Located(..) )
 import Outputable
 \end{code}
@@ -611,6 +613,19 @@ newDFunName clas (ty:_) loc
 newDFunName clas [] loc = pprPanic "newDFunName" (ppr clas <+> ppr loc)
 \end{code}
 
+Make a name for the representation tycon of a data/newtype instance.  It's an
+*external* name, like otber top-level names, and hence must be made with
+newGlobalBinder.
+
+\begin{code}
+newFamInstTyConName :: Name -> SrcLoc -> TcM Name
+newFamInstTyConName tc_name loc
+  = do { index <- nextDFunIndex
+       ; mod   <- getModule
+       ; let occ = nameOccName tc_name
+       ; newGlobalBinder mod (mkInstTyTcOcc index occ) Nothing loc }
+\end{code}
+
 
 %************************************************************************
 %*                                                                     *