Fixed treatment of predefined types (Int, String).

Fixed treatment of predefined types (Int, String).
Added treatment of new reserved words to reading old grammars.

src/GF/Grammar/LookAbs.hs

@@ -75,13 +75,20 @@ isPrimitiveFun gr (m,c) = case lookupAbsDef gr m c of
 
 lookupRef :: GFCGrammar -> Binds -> Term -> Err Val
 lookupRef gr binds at = case at of
-  Q m f -> lookupFunType gr m f >>= return . vClos
-  Vr i  -> maybeErr ("unknown variable" +++ prt at) $ lookup i binds
-  _     -> prtBad "cannot refine with complex term" at ---
+  Q m f  -> lookupFunType gr m f >>= return . vClos
+  Vr i   -> maybeErr ("unknown variable" +++ prt at) $ lookup i binds
+  EInt _ -> return valAbsInt
+  K _    -> return valAbsString
+  _      -> prtBad "cannot refine with complex term" at ---
 
 refsForType :: (Val -> Type -> Bool) -> GFCGrammar -> Binds -> Val -> [(Term,Val)]
 refsForType compat gr binds val = 
+  -- bound variables
   [(vr i, t) | (i,t) <- binds, Ok ty <- [val2exp t], compat val ty] ++
+  -- integer and string literals
+  [(EInt i, val) | val == valAbsInt, i <- [0,1,2,5,11,1978]] ++
+  [(K s, val) | val == valAbsString, s <- ["foo", "NN", "x"]] ++
+  -- functions defined in the current abstract syntax
   [(qq f, vClos t) | (f,t) <- funsForType compat gr val]
 
 

src/GF/Grammar/TC.hs

@@ -119,6 +119,8 @@ inferExp th tenv@(k,rho,gamma) e = case e of
   Vr x -> mkAnnot (AVr x) $ noConstr $ lookupVar gamma x
   Q m c -> mkAnnot (ACn (m,c)) $ noConstr $ lookupConst th (m,c)
   QC m c -> mkAnnot (ACn (m,c)) $ noConstr $ lookupConst th (m,c) ----
+  EInt i -> return (AInt i, valAbsInt, [])
+  K i -> return (AStr i, valAbsString, [])
   Sort _ -> return (AType, vType, [])
   App f t -> do
     (f',w,csf) <- inferExp th tenv f 

src/GF/Grammar/TypeCheck.hs

@@ -162,6 +162,10 @@ aexp2tree (aexp,cs) = do
      ACn c v -> do
        v' <- whnf v ---- 
        return ([],AtC c,v',[])
+     AInt i -> do
+       return ([],AtI i,valAbsInt,[])
+     AStr s -> do
+       return ([],AtL s,valAbsString,[])
      AMeta m v -> do
        v' <- whnf v ---- 
        return ([],AtM m,v',[])

src/GF/Grammar/Values.hs

@@ -31,11 +31,18 @@ type MetaSubst = [(MetaSymb,Val)]
 
 -- for TC
 
+valAbsInt, valAbsString :: Val
+valAbsInt = VCn (cPredefAbs, cInt)
+valAbsString = VCn (cPredefAbs, cString)
+
 vType :: Val
 vType = VType
 
-cType :: Ident
+cType,cPredefAbs,cInt,cString :: Ident
 cType = identC "Type" --- #0
+cPredefAbs = identC "PredefAbs"
+cInt = identC "Int"
+cString = identC "String"
 
 eType :: Exp
 eType = Sort "Type"