divided DataGFCC

src/GF/GFCC/Linearize.hs

@@ -0,0 +1,77 @@
+module GF.GFCC.Linearize where
+
+import GF.GFCC.Macros
+import GF.GFCC.DataGFCC
+import GF.GFCC.AbsGFCC
+import Data.Map
+import Data.List
+
+-- linearization and computation of concrete GFCC Terms
+
+linearize :: GFCC -> CId -> Exp -> String
+linearize mcfg lang = realize . linExp mcfg lang
+
+realize :: Term -> String
+realize trm = case trm of
+  R ts     -> realize (ts !! 0)
+  S ss     -> unwords $ lmap realize ss
+  K t -> case t of
+    KS s -> s
+    KP s _ -> unwords s ---- prefix choice TODO
+  W s t    -> s ++ realize t
+  FV ts    -> realize (ts !! 0)  ---- other variants TODO
+  TM       -> "?"
+  _ -> "ERROR " ++ show trm ---- debug
+
+linExp :: GFCC -> CId -> Exp -> Term
+linExp mcfg lang tree@(DTr _ at trees) =  ---- bindings TODO
+  case at of
+    AC fun -> comp (lmap lin trees) $ look fun
+    AS s   -> R [kks (show s)] -- quoted
+    AI i   -> R [kks (show i)]
+    AF d   -> R [kks (show d)]
+    AM _   -> TM
+ where
+   lin  = linExp mcfg lang
+   comp = compute mcfg lang
+   look = lookLin mcfg lang
+
+compute :: GFCC -> CId -> [Term] -> Term -> Term
+compute mcfg lang args = comp where
+  comp trm = case trm of
+    P r p  -> proj (comp r) (comp p) 
+    W s t  -> W s (comp t)
+    R ts   -> R $ lmap comp ts
+    V i    -> idx args i          -- already computed
+    F c    -> comp $ look c       -- not computed (if contains argvar)
+    FV ts  -> FV $ lmap comp ts
+    S ts   -> S $ lfilter (/= S []) $ lmap comp ts
+    _ -> trm
+
+  look = lookOper mcfg lang
+
+  idx xs i = if i > length xs - 1 
+    then error 
+         ("too large " ++ show i ++ " for\n" ++ unlines (lmap prt xs) ++ "\n") TM 
+    else xs !! i 
+
+  proj r p = case (r,p) of
+    (_,     FV ts) -> FV $ lmap (proj r) ts
+    (FV ts, _    ) -> FV $ lmap (\t -> proj t r) ts
+    (W s t, _)     -> kks (s ++ getString (proj t p))
+    _              -> comp $ getField r (getIndex p)
+
+  getString t = case t of
+    K (KS s) -> s
+    _ -> error ("ERROR in grammar compiler: string from "++ show t) "ERR"
+
+  getIndex t =  case t of
+    C i    -> i
+    TM     -> 0  -- default value for parameter
+    _ -> error ("ERROR in grammar compiler: index from " ++ show t) 0
+
+  getField t i = case t of
+    R rs   -> idx rs i
+    TM     -> TM
+    _ -> error ("ERROR in grammar compiler: field from " ++ show t) t
+