{- HetCATS/Logic.hs

$Id$

Till Mossakowski

Interface for Parsec parsers.

Generates a ParseFun as needed by Logic.hs

-}

module ParsecInterface

where

import Logic

import Parsec

import ParsecError

-- for a Parsec parser and an initial state, obtain a ParseFun as needed in Logic.hs

toParseFun :: GenParser Char st a -> st -> ParseFun a

toParseFun p init file line col s =

case runParser (do pos <- getPosition

let pos' = setSourceColumn (setSourceLine pos line) col

setPosition pos'

x <- p

s1 <- getInput

pos'' <- getPosition

return (x,s1,sourceLine pos'',sourceColumn pos''))

init file s of

Left err -> error (show err)

Right x -> x