{- |

Module : $Header$

Description : parser for CASL (heterogeneous) structured specifications

Copyright : (c) Till Mossakowski, Christian Maeder, Uni Bremen 2002-2005

License : GPLv2 or higher, see LICENSE.txt

Maintainer : Christian.Maeder@dfki.de

Stability : provisional

Portability : non-portable(Grothendieck)

Parser for CASL (heterogeneous) structured specifications

Concerning the homogeneous syntax, this follows Sect II:3.1.3

of the CASL Reference Manual.

-}

module Syntax.Parse_AS_Structured

( annoParser2

, groupSpec

, aSpec

, logicDescr

, parseMapping

, parseCorrespondences

, translationList

, hetIRI

) where

import Logic.Logic

import Logic.Comorphism

import Logic.Grothendieck

import Syntax.AS_Structured

import Common.AS_Annotation

import Common.AnnoState

import Common.Id

import Common.IRI

import Common.Keywords

import Common.Lexer

import Common.Parsec

import Common.Token

import Text.ParserCombinators.Parsec

import Data.Char

import Data.Maybe

import Control.Monad

hetIRI :: GenParser Char st IRI

hetIRI = try $ do

i <- iriManchester

skipSmart

if iriToStringUnsecure i `elem` casl_reserved_words then

unexpected $ show i

else return i

-- | parse annotations and then still call an annotation parser

annoParser2 :: AParser st (Annoted a) -> AParser st (Annoted a)

annoParser2 =

liftM2 (\ x (Annoted y pos l r) -> Annoted y pos (x ++ l) r) annos

-- * logic and encoding names

-- within sublogics we allow some further symbol characters

sublogicChars :: AParser st String

sublogicChars = many $ satisfy $ \ c -> notElem c ":./\\" && isSignChar c

|| elem c "_'" || isAlphaNum c

{- keep these identical in order to

decide after seeing ".", ":" or "->" what was meant -}

logicName :: AParser st Logic_name

logicName = do

i <- iriManchester

let (ft, rt) = break (== '.') $ abbrevPath i

(e, ms) <- if null rt then return (i, Nothing)

else do

s <- sublogicChars -- try more sublogic characters

return (i { abbrevPath = ft}, Just . mkSimpleId $ tail rt ++ s)

skipSmart

mt <- optionMaybe $ oParenT >> iriCurie << cParenT

return $ Logic_name e ms mt

logicDescr :: LogicGraph -> AParser st LogicDescr

logicDescr l = do

n <- logicName

option (nameToLogicDescr n) $ do

r <- asKey serializationS

try (do

s <- hetIRI

let ld = LogicDescr n (Just s) $ tokPos r

(Logic lid, sm) <- lookupCurrentSyntax "logicDescr" $ setLogicName ld l

fromMaybe pzero $ basicSpecParser sm lid

return ld)

<|> do

s <- iriManchester

unexpected $ "serialization " ++ show s

-- * parse Logic_code

parseLogic :: LogicGraph -> AParser st (Logic_code, LogicGraph)

parseLogic lG = do

lc <- parseLogicAux

case lc of

Logic_code _ _ (Just l) _ ->

return (lc, setLogicName (nameToLogicDescr l) lG)

Logic_code (Just c) _ _ _ -> do

nLg <- lookupAndSetComorphismName c lG

return (lc, nLg)

_ -> return (lc, lG)

parseLogicAux :: AParser st Logic_code

parseLogicAux =

do l <- asKey logicS

do e <- logicName -- try to parse encoding or logic source after "logic"

case e of

Logic_name f Nothing Nothing ->

do c <- colonT

parseLogAfterColon (Just f) [l, c]

<|> parseOptLogTarget Nothing (Just e) [l]

<|> return (Logic_code (Just f) Nothing Nothing

$ tokPos l)

_ -> parseOptLogTarget Nothing (Just e) [l]

<|> do

f <- asKey funS -- parse at least a logic target after "logic"

t <- logicName

return $ Logic_code Nothing Nothing (Just t)

$ tokPos l `appRange` tokPos f

-- parse optional logic source and target after a colon (given an encoding e)

parseLogAfterColon :: Maybe IRI -> [Token] -> AParser st Logic_code

parseLogAfterColon e l =

do s <- logicName

parseOptLogTarget e (Just s) l

<|> return (Logic_code e (Just s) Nothing $ catRange l)

<|> parseOptLogTarget e Nothing l

-- parse an optional logic target (given encoding e or source s)

parseOptLogTarget :: Maybe IRI -> Maybe Logic_name -> [Token]

-> AParser st Logic_code

parseOptLogTarget e s l =

do f <- asKey funS

let p = catRange $ l ++ [f]

do t <- logicName

return (Logic_code e s (Just t) p)

<|> return (Logic_code e s Nothing p)

plainComma :: AParser st Token

plainComma = anComma `notFollowedWith` asKey logicS

-- * parse G_mapping

callSymParser :: Maybe (AParser st a) -> String -> String ->

AParser st ([a], [Token])

callSymParser p name itemType = case p of

Nothing ->

fail $ "no symbol" ++ itemType ++ " parser for language " ++ name

Just pa -> separatedBy pa plainComma

parseItemsMap :: AnyLogic -> AParser st (G_symb_map_items_list, [Token])

parseItemsMap (Logic lid) = do

(cs, ps) <- callSymParser (parse_symb_map_items lid)

(language_name lid) " maps"

return (G_symb_map_items_list lid cs, ps)

parseMapping :: LogicGraph -> AParser st ([G_mapping], [Token])

parseMapping = parseMapOrHide G_logic_translation G_symb_map parseItemsMap

parseMapOrHide :: (Logic_code -> a) -> (t -> a)

-> (AnyLogic -> AParser st (t, [Token])) -> LogicGraph

-> AParser st ([a], [Token])

parseMapOrHide constrLogic constrMap pa lG =

do (n, nLg) <- parseLogic lG

do c <- anComma

(gs, ps) <- parseMapOrHide constrLogic constrMap pa nLg

return (constrLogic n : gs, c : ps)

<|> return ([constrLogic n], [])

<|> do

l <- lookupCurrentLogic "parseMapOrHide" lG

(m, ps) <- pa l

do c <- anComma

(gs, qs) <- parseMapOrHide constrLogic constrMap pa lG

return (constrMap m : gs, ps ++ c : qs)

<|> return ([constrMap m], ps)

-- * parse G_hiding

parseItemsList :: AnyLogic -> AParser st (G_symb_items_list, [Token])

parseItemsList (Logic lid) = do

(cs, ps) <- callSymParser (parse_symb_items lid)

(language_name lid) ""

return (G_symb_items_list lid cs, ps)

parseHiding :: LogicGraph -> AParser st ([G_hiding], [Token])

parseHiding = parseMapOrHide G_logic_projection G_symb_list parseItemsList

-- * specs

-- "then" is associative, therefore flatten extensions

flatExts :: [Annoted SPEC] -> [Annoted SPEC]

flatExts = concatMap $ \ as -> case item as of

Extension sps _ -> sps

Group sp _ -> case flatExts [sp] of

[_] -> [as]

sps -> sps

_ -> [as]

spec :: LogicGraph -> AParser st (Annoted SPEC)

spec l = do

(sps, ps) <- annoParser2 (specA l) `separatedBy` asKey thenS

return $ case sps of

[sp] -> sp

_ -> emptyAnno (Extension (flatExts sps) $ catRange ps)

specA :: LogicGraph -> AParser st (Annoted SPEC)

specA l = do

(sps, ps) <- annoParser2 (specB l) `separatedBy` asKey andS

return $ case sps of

[sp] -> sp

_ -> emptyAnno (Union sps $ catRange ps)

specB :: LogicGraph -> AParser st (Annoted SPEC)

specB l = do

p1 <- asKey localS

sp1 <- aSpec l

p2 <- asKey withinS

sp2 <- annoParser2 $ specB l

return (emptyAnno $ Local_spec sp1 sp2 $ tokPos p1 `appRange` tokPos p2)

<|> specC l

specC :: LogicGraph -> AParser st (Annoted SPEC)

specC lG = do

let spD = annoParser $ specD lG

rest = spD >>= translationList lG Translation Reduction

l@(Logic lid) <- lookupCurrentLogic "specC" lG

{- if the current logic has an associated data_logic,

parse "data SPEC1 SPEC2", where SPEC1 is in the data_logic

SPEC1 needs to be a basic spec or a grouped spec

SPEC2 is in the currrent logic -}

case data_logic lid of

Nothing -> rest

Just lD@(Logic dl) -> do

p1 <- asKey dataS -- not a keyword

sp1 <- annoParser $ basicSpec (lD, Nothing)

<|> groupSpec (setCurLogic (language_name dl) lG)

sp2 <- spD

return (emptyAnno $ Data lD l sp1 sp2 $ tokPos p1)

<|> rest

translationList :: LogicGraph -> (Annoted b -> RENAMING -> b)

-> (Annoted b -> RESTRICTION -> b) -> Annoted b -> AParser st (Annoted b)

translationList l ftrans frestr sp =

do sp' <- translation l sp ftrans frestr

translationList l ftrans frestr (emptyAnno sp')

<|> return sp

{- | Parse renaming

@

RENAMING ::= with SYMB-MAP-ITEMS-LIST

@

SYMB-MAP-ITEMS-LIST is parsed using parseMapping -}

renaming :: LogicGraph -> AParser st RENAMING

renaming l =

do kWith <- asKey withS

(mappings, commas) <- parseMapping l

return (Renaming mappings $ catRange $ kWith : commas)

{- | Parse restriction

@

RESTRICTION ::= hide SYMB-ITEMS-LIST

| reveal SYMB-MAP-ITEMS-LIST

@

SYMB-ITEMS-LIST is parsed using parseHiding; SYMB-MAP-ITEMS-LIST is

parsed using parseItemsMap -}

restriction :: LogicGraph -> AParser st RESTRICTION

restriction lg =

-- hide

do kHide <- asKey hideS

(symbs, commas) <- parseHiding lg

return (Hidden symbs (catRange (kHide : commas)))

<|> -- reveal

do kReveal <- asKey revealS

nl <- lookupCurrentLogic "reveal" lg

(mappings, commas) <- parseItemsMap nl

return (Revealed mappings (catRange (kReveal : commas)))

translation :: LogicGraph -> a -> (a -> RENAMING -> b)

-> (a -> RESTRICTION -> b) -> AParser st b

translation l sp ftrans frestr =

do r <- renaming l

return (ftrans sp r)

<|>

do r <- restriction l

return (frestr sp r)

groupSpecLookhead :: AParser st IRI

groupSpecLookhead =

let tok2IRI = liftM simpleIdToIRI in

tok2IRI oBraceT <|> followedWith (hetIRI << annos)

(choice (map (tok2IRI . asKey) criticalKeywords)

<|> tok2IRI cBraceT <|> tok2IRI oBracketT <|> tok2IRI cBracketT

<|> (eof >> return nullIRI))

specD :: LogicGraph -> AParser st SPEC

-- do some lookahead for free spec, to avoid clash with free type

specD l = do

p <- asKey freeS `followedWith` groupSpecLookhead

sp <- annoParser $ groupSpec l

return (Free_spec sp $ tokPos p)

<|> do

p <- asKey cofreeS `followedWith` groupSpecLookhead

sp <- annoParser $ groupSpec l

return (Cofree_spec sp $ tokPos p)

<|> do

p <- asKey closedS `followedWith` groupSpecLookhead

sp <- annoParser $ groupSpec l

return (Closed_spec sp $ tokPos p)

<|> specE l

specE :: LogicGraph -> AParser st SPEC

specE l = logicSpec l

<|> combineSpec

<|> (lookAhead groupSpecLookhead >> groupSpec l)

<|> (lookupCurrentSyntax "basic spec" l >>= basicSpec)

-- | call a logic specific parser if it exists

callParser :: Maybe (AParser st a) -> String -> String -> AParser st a

callParser p name itemType =

fromMaybe (unexpected $ "no " ++ itemType ++ " parser for " ++ name) p

basicSpec :: (AnyLogic, Maybe IRI) -> AParser st SPEC

basicSpec (Logic lid, sm) = do

p <- getPos

bspec <- callParser (basicSpecParser sm lid) (showSyntax lid sm)

"basic specification"

q <- getPos

return $ Basic_spec (G_basic_spec lid bspec) $ Range [p, q]

logicSpec :: LogicGraph -> AParser st SPEC

logicSpec lG = do

s1 <- asKey logicS

ln <- logicDescr lG

s2 <- colonT

sp <- annoParser $ specD $ setLogicName ln lG

return $ Qualified_spec ln sp $ toRange s1 [] s2

combineSpec :: AParser st SPEC

combineSpec = do

s1 <- asKey combineS

(oir, ps1) <- separatedBy hetIRI commaT

(exl, ps) <- option ([], []) $ do

s2 <- asKey excludingS

(e, ps2) <- separatedBy hetIRI commaT

return (e, s2 : ps2)

return $ Combination oir exl $ catRange $ s1 : ps1 ++ ps

lookupAndSetComorphismName :: IRI -> LogicGraph -> AParser st LogicGraph

lookupAndSetComorphismName cIRI lg = do

Comorphism cid <- lookupComorphism (iriToStringUnsecure cIRI) lg

return $ setCurLogic (language_name $ targetLogic cid) lg

aSpec :: LogicGraph -> AParser st (Annoted SPEC)

aSpec = annoParser2 . spec

groupSpec :: LogicGraph -> AParser st SPEC

groupSpec l = do

b <- oBraceT

do

c <- cBraceT

return $ EmptySpec $ catRange [b, c]

<|> do

a <- aSpec l

c <- cBraceT

return $ Group a $ catRange [b, c]

<|> do

n <- hetIRI

(f, ps) <- fitArgs l

return (Spec_inst n f ps)

fitArgs :: LogicGraph -> AParser st ([Annoted FIT_ARG], Range)

fitArgs l = do

fas <- many (fitArg l)

let (fas1, ps) = unzip fas

return (fas1, concatMapRange id ps)

fitArg :: LogicGraph -> AParser st (Annoted FIT_ARG, Range)

fitArg l = do

b <- oBracketT

fa <- annoParser (fittingArg l)

c <- cBracketT

return (fa, toRange b [] c)

fittingArg :: LogicGraph -> AParser st FIT_ARG

fittingArg l = do

s <- asKey viewS

vn <- hetIRI

(fa, ps) <- fitArgs l

return (Fit_view vn fa (tokPos s `appRange` ps))

<|> do

sp <- aSpec l

(symbit, ps) <- option ([], nullRange) $ do

s <- asKey fitS

(m, qs) <- parseMapping l

return (m, catRange $ s : qs)

return (Fit_spec sp symbit ps)

parseCorrespondences :: LogicGraph -> AParser st [CORRESPONDENCE]

parseCorrespondences l = commaSep1 $ correspondence l

correspondence :: LogicGraph -> AParser st CORRESPONDENCE

correspondence l = do

asKey "*"

return Default_correspondence

<|> do

asKey relationS

rref <- optionMaybe relationRef

conf <- optionMaybe confidence

oBraceT

cs <- parseCorrespondences l

cBraceT

return $ Correspondence_block rref conf cs

<|> do

(mcid, eRef, mrRef, mconf, toer) <- corr1 l

{- trace (concat ["\t", show mcid, " \t", show eRef, "\t", show mrRef,

" \t", show mconf, " \t", show toer]) $ return ()

only commented out for future debugging purposes -}

return $ Single_correspondence mcid eRef toer mrRef mconf

corr1 :: LogicGraph

-> AParser st ( Maybe CORRESPONDENCE_ID, ENTITY_REF

, Maybe RELATION_REF, Maybe CONFIDENCE, TERM_OR_ENTITY_REF)

corr1 l = do

eRef <- hetIRI

(mrRef, mconf, toer) <- corr2 l

cids <- annos

if not (null cids || null (tail cids))

then fail "more than one correspondence id"

else return (listToMaybe cids, eRef, mrRef, mconf, toer)

corr2 :: LogicGraph

-> AParser st (Maybe RELATION_REF, Maybe CONFIDENCE, TERM_OR_ENTITY_REF)

corr2 l = do

rRef <- try relationRefWithLookAhead

(mconf, toer) <- corr3 l

return (Just rRef, mconf, toer)

<|> do

(mconf, toer) <- corr3 l

return (Nothing, mconf, toer)

corr3 :: LogicGraph -> AParser st (Maybe CONFIDENCE, TERM_OR_ENTITY_REF)

corr3 l = do

conf <- try confidence

toer <- termOrEntityRef l

return (Just conf, toer)

<|> do

toer <- termOrEntityRef l

return (Nothing, toer)

relationRefWithLookAhead :: AParser st RELATION_REF

relationRefWithLookAhead = do

r <- relationRef

lookAhead (confidenceBegin >> return nullIRI)

<|> lookAhead (try hetIRI)

return r

relationRef :: AParser st RELATION_REF

relationRef = ((do

asKey ">"

return Subsumes

<|> do

asKey "<"

return IsSubsumed

<|> do

asKey "="

return Equivalent

<|> do

asKey "%"

return Incompatible

<|> do

try $ asKey "$\\ni$"

return HasInstance

<|> do

try $ asKey "$\\in$"

return InstanceOf

<|> do

asKey "$\\mapsto$"

return DefaultRelation

) << skipSmart)

<|> do

i <- hetIRI

return $ Iri i

confidenceBegin :: AParser st Char

confidenceBegin = char '('

termOrEntityRef :: LogicGraph -> AParser st TERM_OR_ENTITY_REF

termOrEntityRef l = do

i <- hetIRI

return $ Entity_ref i

<|> (lookupCurrentLogic "term" l >>= term)

-- TODO: implement

term :: AnyLogic -> AParser st TERM_OR_ENTITY_REF

term (Logic lid) = do

_symbs <- callParser (parse_symb_items lid) (language_name lid) "term"

-- return $ Term (G_symb_items_list lid [symbs]) $ Range [p, q]

fail "term not implemented yet"

confidence :: AParser st Double

confidence = char '(' >> confidenceNumber << char ')' << skipSmart

confidenceNumber :: AParser st Double

confidenceNumber = do

d1 <- char '0'

option 0 $ do

d2 <- char '.'

ds <- many digit

return $ read $ d1 : d2 : ds

<|> do

char '1'

option 1 $ do

char '.'

many $ char '0'

return 1