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authoraarne <aarne@cs.chalmers.se>2008-06-25 16:43:48 +0000
committeraarne <aarne@cs.chalmers.se>2008-06-25 16:43:48 +0000
commitb96b36f43de3e2f8b58d5f539daa6f6d47f25870 (patch)
tree0992334be13cec6538a1dea22fbbf26ad6bdf224 /src/GF/OldParsing/Utilities.hs
parentfe367412e0aeb4ad5c02de68e6eca382e0f96984 (diff)
removed src for 2.9
Diffstat (limited to 'src/GF/OldParsing/Utilities.hs')
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diff --git a/src/GF/OldParsing/Utilities.hs b/src/GF/OldParsing/Utilities.hs
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@@ -1,188 +0,0 @@
-----------------------------------------------------------------------
--- |
--- Module : Parsing.Utilities
--- Maintainer : PL
--- Stability : (stable)
--- Portability : (portable)
---
--- > CVS $Date: 2005/04/21 16:22:54 $
--- > CVS $Author: bringert $
--- > CVS $Revision: 1.2 $
---
--- Basic type declarations and functions to be used when parsing
------------------------------------------------------------------------------
-
-
-module GF.OldParsing.Utilities
- ( -- * Symbols
- Symbol(..), symbol, mapSymbol,
- -- * Edges
- Edge(..),
- -- * Parser input
- Input(..), makeInput, input, inputMany,
- -- * charts, parse forests & trees
- ParseChart, ParseForest(..), ParseTree(..),
- chart2forests, forest2trees
- ) where
-
--- haskell modules:
-import Control.Monad
-import Data.Array
--- gf modules:
-import GF.Data.SortedList
-import GF.Data.Assoc
--- parsing modules:
-import GF.Printing.PrintParser
-
-------------------------------------------------------------
--- symbols
-
-data Symbol c t = Cat c | Tok t
- deriving (Eq, Ord, Show)
-
-symbol :: (c -> a) -> (t -> a) -> Symbol c t -> a
-mapSymbol :: (c -> d) -> (t -> u) -> Symbol c t -> Symbol d u
-
-----------
-
-symbol fc ft (Cat cat) = fc cat
-symbol fc ft (Tok tok) = ft tok
-
-mapSymbol fc ft = symbol (Cat . fc) (Tok . ft)
-
-
-------------------------------------------------------------
--- edges
-
-data Edge s = Edge Int Int s
- deriving (Eq, Ord, Show)
-
-instance Functor Edge where
- fmap f (Edge i j s) = Edge i j (f s)
-
-
-------------------------------------------------------------
--- parser input
-
-data Input t = MkInput { inputEdges :: [Edge t],
- inputBounds :: (Int, Int),
- inputFrom :: Array Int (Assoc t [Int]),
- inputTo :: Array Int (Assoc t [Int]),
- inputToken :: Assoc t [(Int, Int)]
- }
-
-makeInput :: Ord t => [Edge t] -> Input t
-input :: Ord t => [t] -> Input t
-inputMany :: Ord t => [[t]] -> Input t
-
-----------
-
-makeInput inEdges | null inEdges = input []
- | otherwise = MkInput inEdges inBounds inFrom inTo inToken
- where inBounds = foldr1 minmax [ (i, j) | Edge i j _ <- inEdges ]
- where minmax (a, b) (a', b') = (min a a', max b b')
- inFrom = fmap (accumAssoc id) $ accumArray (<++>) [] inBounds $
- [ (i, [(tok, j)]) | Edge i j tok <- inEdges ]
- inTo = fmap (accumAssoc id) $ accumArray (<++>) [] inBounds
- [ (j, [(tok, i)]) | Edge i j tok <- inEdges ]
- inToken = accumAssoc id [ (tok, (i, j)) | Edge i j tok <- inEdges ]
-
-input toks = MkInput inEdges inBounds inFrom inTo inToken
- where inEdges = zipWith3 Edge [0..] [1..] toks
- inBounds = (0, length toks)
- inFrom = listArray inBounds $
- [ listAssoc [(tok, [j])] | (tok, j) <- zip toks [1..] ] ++ [ listAssoc [] ]
- inTo = listArray inBounds $
- [ listAssoc [] ] ++ [ listAssoc [(tok, [i])] | (tok, i) <- zip toks [0..] ]
- inToken = accumAssoc id [ (tok, (i, j)) | Edge i j tok <- inEdges ]
-
-inputMany toks = MkInput inEdges inBounds inFrom inTo inToken
- where inEdges = [ Edge i j t | (i, j, ts) <- zip3 [0..] [1..] toks, t <- ts ]
- inBounds = (0, length toks)
- inFrom = listArray inBounds $
- [ listAssoc [ (t, [j]) | t <- nubsort ts ] | (ts, j) <- zip toks [1..] ]
- ++ [ listAssoc [] ]
- inTo = listArray inBounds $
- [ listAssoc [] ] ++
- [ listAssoc [ (t, [i]) | t <- nubsort ts ] | (ts, i) <- zip toks [0..] ]
- inToken = accumAssoc id [ (tok, (i, j)) | Edge i j tok <- inEdges ]
-
-
-------------------------------------------------------------
--- charts, parse forests & trees
-
-type ParseChart n e = Assoc e [(n, [[e]])]
-
-data ParseForest n = FNode n [[ParseForest n]] | FMeta
- deriving (Eq, Ord, Show)
-
-data ParseTree n = TNode n [ParseTree n] | TMeta
- deriving (Eq, Ord, Show)
-
-chart2forests :: Ord e => ParseChart n e -> (e -> Bool) -> e -> [ParseForest n]
-
---filterCoercions :: (n -> Bool) -> ParseForest n -> [ParseForest n]
-
-forest2trees :: ParseForest n -> [ParseTree n]
-
-instance Functor ParseTree where
- fmap f (TNode n trees) = TNode (f n) $ map (fmap f) trees
- fmap f (TMeta) = TMeta
-
-instance Functor ParseForest where
- fmap f (FNode n forests) = FNode (f n) $ map (map (fmap f)) forests
- fmap f (FMeta) = FMeta
-
-----------
-
-chart2forests chart isMeta = edge2forests
- where item2forest (name, children) = FNode name $
- do edges <- children
- mapM edge2forests edges
- edge2forests edge
- | isMeta edge = [FMeta]
- | otherwise = filter checkForest $ map item2forest $ chart ? edge
- checkForest (FNode _ children) = not (null children)
-
--- filterCoercions _ (FMeta) = [FMeta]
--- filterCoercions isCoercion (FNode s forests)
--- | isCoercion s = do [forest] <- forests ; filterCoercions isCoercion forest
--- | otherwise = FNode s $ do children <- forests ; mapM (filterCoercions isCoercion)
-
-forest2trees (FNode s forests) = map (TNode s) $ forests >>= mapM forest2trees
-forest2trees (FMeta) = [TMeta]
-
-
-
-------------------------------------------------------------
--- pretty-printing
-
-instance (Print c, Print t) => Print (Symbol c t) where
- prt = symbol prt (simpleShow.prt)
- prtList = prtSep " "
-
-simpleShow :: String -> String
-simpleShow s = "\"" ++ concatMap mkEsc s ++ "\""
- where
- mkEsc :: Char -> String
- mkEsc c = case c of
- _ | elem c "\\\"" -> '\\' : [c]
- '\n' -> "\\n"
- '\t' -> "\\t"
- _ -> [c]
-
-instance (Print s) => Print (Edge s) where
- prt (Edge i j s) = "[" ++ show i ++ "-" ++ show j ++ ": " ++ prt s ++ "]"
- prtList = prtSep ""
-
-instance (Print s) => Print (ParseTree s) where
- prt (TNode s trees) = prt s ++ "^{" ++ prtSep " " trees ++ "}"
- prt (TMeta) = "?"
- prtList = prtAfter "\n"
-
-instance (Print s) => Print (ParseForest s) where
- prt (FNode s forests) = prt s ++ "^{" ++ prtSep " | " (map (prtSep " ") forests) ++ "}"
- prt (FMeta) = "?"
- prtList = prtAfter "\n"
-
-