remove the transfer modules. We don't need anything special, a transfer module is module without concrete syntax

src/GF/Compile/CheckGrammar.hs

@@ -62,8 +62,6 @@ checkModule ms (name,mo) = checkIn (text "checking module" <+> ppIdent name) $ d
     js' <- case mtype mo of
       MTAbstract -> checkMap (checkAbsInfo gr name mo) js
 
-      MTTransfer a b -> checkMap (checkAbsInfo gr name mo) js
-
       MTResource -> checkMap (checkResInfo gr name mo) js
 
       MTConcrete a -> do

src/GF/Compile/ModDeps.hs

@@ -99,8 +99,7 @@ moduleDeps ms = mapM deps ms where
     _ -> mt0 == mt
   -- in the same way; this defines what can be opened
   compatOType mt0 mt = case mt0 of
-    MTAbstract     -> mt == MTAbstract
-    MTTransfer _ _ -> mt == MTAbstract
+    MTAbstract -> mt == MTAbstract
     _ -> case mt of
       MTResource -> True
       MTInterface -> True

src/GF/Compile/ReadFiles.hs

@@ -177,7 +177,6 @@ importsOfModule (m,mi) = (modName m,depModInfo mi [])
     depModType (MTInterface)      xs = xs
     depModType (MTConcrete m2)    xs = modName m2:xs
     depModType (MTInstance m2)    xs = modName m2:xs
-    depModType (MTTransfer o1 o2) xs = depOpen o1 (depOpen o2 xs)
 
     depExtends es xs = foldr depInclude xs es
 

src/GF/Compile/Rename.hs

@@ -131,7 +131,7 @@ tree2status o = case o of
 buildStatus :: SourceGrammar -> Ident -> SourceModInfo -> Err Status
 buildStatus gr c mo = let mo' = self2status c mo in do
     let gr1 = MGrammar ((c,mo) : modules gr)
-        ops = [OSimple e | e <- allExtends gr1 c] ++ allOpens mo
+        ops = [OSimple e | e <- allExtends gr1 c] ++ opens mo
     mods <- mapM (lookupModule gr1 . openedModule) ops
     let sts = map modInfo2status $ zip ops mods    
     return $ if isModCnc mo
@@ -142,9 +142,7 @@ modInfo2status :: (OpenSpec Ident,SourceModInfo) -> (OpenSpec Ident, StatusTree)
 modInfo2status (o,mo) = (o,tree2status o (jments mo))
 
 self2status :: Ident -> SourceModInfo -> StatusTree
-self2status c m = mapTree (info2status (Just c)) js where   -- qualify internal
-  js | isModTrans m = sorted2tree $ tree2list $ jments m 
-     | otherwise    = jments m
+self2status c m = mapTree (info2status (Just c)) (jments m)
 
 forceQualif o = case o of
   OSimple i   -> OQualif i i

src/GF/Grammar/Binary.hs

@@ -37,7 +37,6 @@ instance (Ord i, Binary i, Binary a) => Binary (ModInfo i a) where
 
 instance (Binary i) => Binary (ModuleType i) where
   put MTAbstract       = putWord8 0
-  put (MTTransfer i j) = putWord8 1 >> put (i,j)
   put MTResource       = putWord8 2
   put (MTConcrete i)   = putWord8 3 >> put i
   put MTInterface      = putWord8 4
@@ -45,7 +44,6 @@ instance (Binary i) => Binary (ModuleType i) where
   get = do tag <- getWord8
            case tag of
              0 -> return MTAbstract
-             1 -> get >>= \(i,j) -> return (MTTransfer i j)
              2 -> return MTResource
              3 -> get >>= return . MTConcrete
              4 -> return MTInterface

src/GF/Grammar/Parser.y

@@ -91,7 +91,6 @@ import GF.Compile.Update (buildAnyTree)
  'resource'   { T_resource  }
  'strs'       { T_strs      }
  'table'      { T_table     }
- 'transfer'   { T_transfer  }
  'variants'   { T_variants  }
  'where'      { T_where     }
  'with'       { T_with      }
@@ -143,7 +142,6 @@ ModType
   | 'interface' Ident                    { (MTInterface,     $2) }
   | 'concrete'  Ident 'of' Ident         { (MTConcrete $4,   $2) }
   | 'instance'  Ident 'of' Ident         { (MTInstance $4,   $2) }
-  | 'transfer'  Ident ':' Open '->' Open { (MTTransfer $4 $6,$2) }
 
 ModHeaderBody :: { ( [(Ident,MInclude Ident)]
                    , Maybe (Ident,MInclude Ident,[(Ident,Ident)])
@@ -701,11 +699,6 @@ checkInfoType (MTInstance _)   (id,pos,info) =
     ResValue _   -> return ()
     ResOper  _ _ -> return ()
     _            -> failLoc (fst pos) "illegal definition in instance module" 
-checkInfoType (MTTransfer _ _) (id,pos,info) =
-  case info of
-    AbsCat _ _   -> return ()
-    AbsFun _ _ _ -> return ()
-    _            -> failLoc (fst pos) "illegal definition in transfer module" 
 
 
 mkAlts cs = case cs of

src/GF/Grammar/Printer.hs

@@ -58,7 +58,6 @@ ppModule q (mn, ModInfo mtype mstat opts exts with opens _ jments _) =
       modTypeDoc =
         case mtype of
           MTAbstract         -> text "abstract"  <+> ppIdent mn
-          MTTransfer src dst -> text "transfer"  <+> ppIdent mn <+> colon <+> ppOpenSpec src <+> text "->" <+> ppOpenSpec dst
           MTResource         -> text "resource"  <+> ppIdent mn
           MTConcrete abs     -> text "concrete"  <+> ppIdent mn <+> text "of" <+> ppIdent abs
           MTInterface        -> text "interface" <+> ppIdent mn

src/GF/Infra/Modules.hs

@@ -26,7 +26,7 @@ module GF.Infra.Modules (
 		addOpenQualif, flagsModule, allFlags, mapModules,
 		OpenSpec(..),
 		ModuleStatus(..),
-		openedModule, allOpens, depPathModule, allDepsModule, partOfGrammar,
+		openedModule, depPathModule, allDepsModule, partOfGrammar,
 		allExtends, allExtendSpecs, allExtendsPlus, allExtensions, 
                 searchPathModule, addModule,
 		emptyMGrammar, emptyModInfo,
@@ -34,7 +34,7 @@ module GF.Infra.Modules (
 		abstractOfConcrete, abstractModOfConcrete,
 		lookupModule, lookupModuleType, lookupInfo,
                 lookupPosition, ppPosition,
-		isModAbs, isModRes, isModCnc, isModTrans,
+		isModAbs, isModRes, isModCnc,
 		sameMType, isCompilableModule, isCompleteModule,
 		allAbstracts, greatestAbstract, allResources,
 		greatestResource, allConcretes, allConcreteModules
@@ -72,7 +72,6 @@ data ModInfo i a = ModInfo {
 -- | encoding the type of the module
 data ModuleType i = 
     MTAbstract 
-  | MTTransfer (OpenSpec i) (OpenSpec i) 
   | MTResource
   | MTConcrete i
     -- ^ up to this, also used in GFC. Below, source only.
@@ -141,18 +140,12 @@ openedModule o = case o of
   OSimple m -> m
   OQualif _ m -> m
 
-allOpens :: ModInfo i a -> [OpenSpec i]
-allOpens m = case mtype m of
-  MTTransfer a b -> a : b : opens m
-  _ -> opens m
-
 -- | initial dependency list
 depPathModule :: Ord i => ModInfo i a -> [OpenSpec i]
 depPathModule m = fors m ++ exts m ++ opens m
   where
     fors m = 
       case mtype m of
-        MTTransfer i j -> [i,j]
         MTConcrete i   -> [OSimple i]
         MTInstance i   -> [OSimple i]
         _              -> []
@@ -292,11 +285,6 @@ isModCnc m = case mtype m of
   MTConcrete _ -> True
   _ -> False
 
-isModTrans :: ModInfo i a -> Bool
-isModTrans m = case mtype m of
-  MTTransfer _ _ -> True
-  _ -> False
-
 sameMType :: Eq i => ModuleType i -> ModuleType i -> Bool
 sameMType m n = case (n,m) of
   (MTConcrete _, MTConcrete _) -> True