{-

Module : $Header$

Description : Parser for CASL_DL

Copyright : (c) Klaus L�ttich, Uni Bremen 2004

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : luecke@informatik.uni-bremen.de

Stability : provisional

Portability : portable

Parser for CASL_DL logic

-}

module CASL_DL.Parse_AS where

import Common.AnnoState

import Common.Id

import Common.Lexer

import Common.Token

import CASL_DL.AS_CASL_DL

import CASL.Formula

import CASL.AS_Basic_CASL

import Text.ParserCombinators.Parsec

dlFormula :: AParser st DL_FORMULA

dlFormula =

try (

do

(ct,ctp) <- cardKeyword

o <- oBracketT

p <- parsePredSymb

c <- cBracketT

op <- oParenT

t1 <- term casl_DL_reserved_words

co <- anComma

t2 <- term casl_DL_reserved_words

cp <- cParenT

return (Cardinality ct p t1 t2 Nothing

(appRange ctp (concatMapRange tokPos (o:c:op:co:[cp])))))

<|>

do

(ct,ctp) <- cardKeyword

o <- oBracketT

p <- parsePredSymb

c <- cBracketT

op <- oParenT

t1 <- term casl_DL_reserved_words

co <- anComma

t2 <- term casl_DL_reserved_words

aco <- anComma

t3 <- term casl_DL_reserved_words

cp <- cParenT

return (Cardinality ct p t1 t2 (Just t3)

(appRange ctp (concatMapRange tokPos (o:c:op:co:aco:[cp]))))

parsePredSymb :: AParser st PRED_SYMB

parsePredSymb = fmap Pred_name (parseId casl_DL_reserved_words)

<|>

(do o <- oParenT << addAnnos

Mixfix_qual_pred qpred <- qualPredName casl_DL_reserved_words o

return qpred)

<?> "a PRED_SYMB"

cardKeyword :: AParser st (CardType, Range)

cardKeyword = choice $ map ( \ v -> do

kw <- asKey $ show v

return (v, tokPos kw)) caslDLCardTypes

instance AParsable DL_FORMULA where

aparser = dlFormula