mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-16 16:29:32 -06:00
125 lines
6.1 KiB
Haskell
125 lines
6.1 KiB
Haskell
module PGF.Linearize
|
|
( linearize
|
|
, linearizeAll
|
|
, linearizeAllLang
|
|
, bracketedLinearize
|
|
, tabularLinearizes
|
|
) where
|
|
|
|
import PGF.CId
|
|
import PGF.Data
|
|
import PGF.Macros
|
|
import PGF.Expr
|
|
import Data.Array.IArray
|
|
import Data.List
|
|
import Control.Monad
|
|
import qualified Data.Map as Map
|
|
import qualified Data.IntMap as IntMap
|
|
import qualified Data.Set as Set
|
|
|
|
--------------------------------------------------------------------
|
|
-- The API
|
|
--------------------------------------------------------------------
|
|
|
|
-- | Linearizes given expression as string in the language
|
|
linearize :: PGF -> Language -> Tree -> String
|
|
linearize pgf lang = concat . take 1 . map (unwords . concatMap flattenBracketedString . snd . untokn "" . firstLin) . linTree pgf lang
|
|
|
|
-- | The same as 'linearizeAllLang' but does not return
|
|
-- the language.
|
|
linearizeAll :: PGF -> Tree -> [String]
|
|
linearizeAll pgf = map snd . linearizeAllLang pgf
|
|
|
|
-- | Linearizes given expression as string in all languages
|
|
-- available in the grammar.
|
|
linearizeAllLang :: PGF -> Tree -> [(Language,String)]
|
|
linearizeAllLang pgf t = [(lang,linearize pgf lang t) | lang <- Map.keys (concretes pgf)]
|
|
|
|
-- | Linearizes given expression as a bracketed string in the language
|
|
bracketedLinearize :: PGF -> Language -> Tree -> BracketedString
|
|
bracketedLinearize pgf lang = head . concat . map (snd . untokn "" . firstLin) . linTree pgf lang
|
|
where
|
|
-- head [] = error "cannot linearize"
|
|
head [] = Leaf ""
|
|
-- so that linearize = flattenBracketedString . bracketedLinearize
|
|
head (bs:bss) = bs
|
|
|
|
firstLin (_,arr)
|
|
| inRange (bounds arr) 0 = arr ! 0
|
|
| otherwise = LeafKS []
|
|
|
|
-- | Creates a table from feature name to linearization.
|
|
-- The outher list encodes the variations
|
|
tabularLinearizes :: PGF -> CId -> Expr -> [[(String,String)]]
|
|
tabularLinearizes pgf lang e = map cnv (linTree pgf lang e)
|
|
where
|
|
cnv ((cat,_),lin) = zip (lbls cat) $ map (unwords . concatMap flattenBracketedString . snd . untokn "") (elems lin)
|
|
|
|
lbls cat = case Map.lookup cat (cnccats (lookConcr pgf lang)) of
|
|
Just (CncCat _ _ lbls) -> elems lbls
|
|
Nothing -> error "No labels"
|
|
|
|
--------------------------------------------------------------------
|
|
-- Implementation
|
|
--------------------------------------------------------------------
|
|
|
|
linTree :: PGF -> Language -> Expr -> [(CncType, Array LIndex BracketedTokn)]
|
|
linTree pgf lang e =
|
|
nub [(ct,amapWithIndex (\label -> Bracket_ cat fid label fun es) lin) | (_,(ct@(cat,fid),fun,es,(xs,lin))) <- lin Nothing 0 e [] [] e []]
|
|
where
|
|
cnc = lookMap (error "no lang") lang (concretes pgf)
|
|
lp = lproductions cnc
|
|
|
|
lin mb_cty n_fid e0 ys xs (EAbs _ x e) es = lin mb_cty n_fid e0 ys (x:xs) e es
|
|
lin mb_cty n_fid e0 ys xs (EApp e1 e2) es = lin mb_cty n_fid e0 ys xs e1 (e2:es)
|
|
lin mb_cty n_fid e0 ys xs (EImplArg e) es = lin mb_cty n_fid e0 ys xs e es
|
|
lin mb_cty n_fid e0 ys xs (ETyped e _) es = lin mb_cty n_fid e0 ys xs e es
|
|
lin mb_cty n_fid e0 ys xs (EFun f) es = apply mb_cty n_fid e0 ys xs f es
|
|
lin mb_cty n_fid e0 ys xs (EMeta i) es = def mb_cty n_fid e0 ys xs ('?':show i)
|
|
lin mb_cty n_fid e0 ys xs (EVar i) _ = def mb_cty n_fid e0 ys xs (showCId ((xs++ys) !! i))
|
|
lin mb_cty n_fid e0 ys xs (ELit l) [] = case l of
|
|
LStr s -> return (n_fid+1,((cidString,n_fid),wildCId,[e0],([],ss s)))
|
|
LInt n -> return (n_fid+1,((cidInt, n_fid),wildCId,[e0],([],ss (show n))))
|
|
LFlt f -> return (n_fid+1,((cidFloat, n_fid),wildCId,[e0],([],ss (show f))))
|
|
|
|
ss s = listArray (0,0) [[LeafKS [s]]]
|
|
|
|
apply :: Maybe CncType -> FId -> Expr -> [CId] -> [CId] -> CId -> [Expr] -> [(FId,(CncType, CId, [Expr], LinTable))]
|
|
apply mb_cty n_fid e0 ys xs f es =
|
|
case Map.lookup f lp of
|
|
Just prods -> do (funid,(cat,fid),ctys) <- getApps prods
|
|
(n_fid,args) <- descend n_fid (zip ctys es)
|
|
return (n_fid+1,((cat,n_fid),f,[e0],mkLinTable cnc (const True) xs funid args))
|
|
Nothing -> def mb_cty n_fid e0 ys xs ("[" ++ showCId f ++ "]") -- fun without lin
|
|
where
|
|
getApps prods =
|
|
case mb_cty of
|
|
Just (cat,fid) -> maybe [] (concatMap (toApp fid) . Set.toList) (IntMap.lookup fid prods)
|
|
Nothing -> concat [toApp fid prod | (fid,set) <- IntMap.toList prods, prod <- Set.toList set]
|
|
where
|
|
toApp fid (PApply funid pargs) =
|
|
let Just (ty,_,_,_,_) = Map.lookup f (funs (abstract pgf))
|
|
(args,res) = catSkeleton ty
|
|
in [(funid,(res,fid),zip args [fid | PArg _ fid <- pargs])]
|
|
toApp _ (PCoerce fid) =
|
|
maybe [] (concatMap (toApp fid) . Set.toList) (IntMap.lookup fid prods)
|
|
|
|
descend n_fid [] = return (n_fid,[])
|
|
descend n_fid ((cty,e):fes) = do (n_fid,arg) <- lin (Just cty) n_fid e (xs++ys) [] e []
|
|
(n_fid,args) <- descend n_fid fes
|
|
return (n_fid,arg:args)
|
|
|
|
def (Just (cat,fid)) n_fid e0 ys xs s =
|
|
case IntMap.lookup fid (lindefs cnc) of
|
|
Just funs -> do funid <- funs
|
|
let args = [((wildCId, n_fid),wildCId,[e0],([],ss s))]
|
|
return (n_fid+2,((cat,n_fid+1),wildCId,[e0],mkLinTable cnc (const True) xs funid args))
|
|
Nothing
|
|
| isPredefFId fid -> return (n_fid+2,((cat,n_fid+1),wildCId,[e0],(xs,listArray (0,0) [[LeafKS [s]]])))
|
|
| otherwise -> do PCoerce fid <- maybe [] Set.toList (IntMap.lookup fid (pproductions cnc))
|
|
def (Just (cat,fid)) n_fid e0 ys xs s
|
|
def Nothing n_fid e0 ys xs s = []
|
|
|
|
amapWithIndex :: (IArray a e1, IArray a e2, Ix i) => (i -> e1 -> e2) -> a i e1 -> a i e2
|
|
amapWithIndex f arr = listArray (bounds arr) (map (uncurry f) (assocs arr))
|