remove some dead types from GF.Grammar.Grammar

src/GF/Grammar/Grammar.hs

@@ -43,9 +43,6 @@ module GF.Grammar.Grammar (SourceGrammar,
 		Param,
 		Altern,
 		Substitution,
-		Branch(..),
-		Con,
-		Trm,
 		wildPatt,
 		varLabel, tupleLabel, linLabel, theLinLabel,
 		ident2label, label2ident
@@ -233,10 +230,6 @@ type Altern = (Term, [(Term, Term)])
 
 type Substitution =  [(Ident, Term)]
 
--- | branches à la Alfa
-newtype Branch = Branch (Con,([Ident],Term)) deriving (Eq, Ord,Show,Read)
-type Con = Ident ---
-
 varLabel :: Int -> Label
 varLabel = LVar
 
@@ -256,5 +249,3 @@ label2ident (LVar i)   = identC (BS.pack ('$':show i))
 
 wildPatt :: Patt
 wildPatt = PV identW
-
-type Trm = Term

src/GF/Grammar/Macros.hs

@@ -405,7 +405,7 @@ freshMeta :: [MetaSymb] -> MetaSymb
 freshMeta ms = MetaSymb (minimum [n | n <- [0..length ms], 
                                       notElem n (map metaSymbInt ms)])
 
-mkFreshMetasInTrm :: [MetaSymb] -> Trm -> Trm
+mkFreshMetasInTrm :: [MetaSymb] -> Term -> Term
 mkFreshMetasInTrm metas = fst . rms minMeta where
   rms meta trm = case trm of
     Meta m  -> (Meta (MetaSymb meta), meta + 1)

src/GF/Grammar/Unify.hs

@@ -38,8 +38,8 @@ unifyVal cs0 = do
      (_,VClos (_:_) _) -> True
      _ -> False
 
-type Unifier = [(MetaSymb, Trm)]
-type Constrs = [(Trm, Trm)]
+type Unifier = [(MetaSymb, Term)]
+type Constrs = [(Term, Term)]
 
 unifyAll :: Constrs -> Unifier -> (Unifier,Constrs)
 unifyAll [] g = (g, [])
@@ -49,7 +49,7 @@ unifyAll ((a@(s, t)) : l) g =
        Ok g2  -> (g2, c)
        _      -> (g1, a : c)
 
-unify :: Trm -> Trm -> Unifier -> Err Unifier
+unify :: Term -> Term -> Unifier -> Err Unifier
 unify e1 e2 g = 
  case (e1, e2) of 
   (Meta s, t) -> do
@@ -67,12 +67,12 @@ unify e1 e2 g =
                                      _       -> prtBad "fail unify" e1
   _                             -> prtBad "fail unify" e1
 
-extend :: Unifier -> MetaSymb -> Trm -> Err Unifier
+extend :: Unifier -> MetaSymb -> Term -> Err Unifier
 extend g s t | (t == Meta s) = return g  
              | occCheck s t  = prtBad "occurs check" t
              | True          = return ((s, t) : g) 
 
-subst_all :: Unifier -> Trm -> Err Trm
+subst_all :: Unifier -> Term -> Err Term
 subst_all s u =
  case (s,u) of
   ([], t)  -> return t
@@ -80,14 +80,14 @@ subst_all s u =
      t' <- (subst_all l t) --- successive substs - why ?
      return $ substMetas [a] t'
 
-substMetas :: [(MetaSymb,Trm)] -> Trm -> Trm
+substMetas :: [(MetaSymb,Term)] -> Term -> Term
 substMetas subst trm = case trm of
    Meta x -> case lookup x subst of
      Just t -> t
      _ -> trm
    _ -> composSafeOp (substMetas subst) trm
 
-occCheck :: MetaSymb -> Trm -> Bool
+occCheck :: MetaSymb -> Term -> Bool
 occCheck s u = case u of
     Meta v  -> s == v
     App c a -> occCheck s c || occCheck s a