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|
----------------------------------------------------------------------
-- |
-- Module : PGrammar
-- Maintainer : AR
-- Stability : (stable)
-- Portability : (portable)
--
-- > CVS $Date: 2005/02/18 19:21:09 $
-- > CVS $Author: peb $
-- > CVS $Revision: 1.6 $
--
-- (Description of the module)
-----------------------------------------------------------------------------
module PGrammar (pTerm, pTrm, pTrms,
pMeta, pzIdent,
string2ident
) where
---import LexGF
import ParGF
import SourceToGrammar
import Grammar
import Ident
import qualified AbsGFC as A
import qualified GFC as G
import GetGrammar
import Macros
import MMacros
import Operations
pTerm :: String -> Err Term
pTerm s = do
e <- {- err2err $ -} pExp $ myLexer s
transExp e
pTrm :: String -> Term
pTrm = errVal (vr (zIdent "x")) . pTerm ---
pTrms :: String -> [Term]
pTrms = map pTrm . sep [] where
sep t cs = case cs of
',' : cs2 -> reverse t : sep [] cs2
c : cs2 -> sep (c:t) cs2
_ -> [reverse t]
pTrm' :: String -> [Term]
pTrm' = err (const []) singleton . pTerm
pMeta :: String -> Integer
pMeta _ = 0 ---
pzIdent :: String -> Ident
pzIdent = zIdent
{-
string2formsAndTerm :: String -> ([Term],Term)
string2formsAndTerm s = case s of
'[':_:_ -> case span (/=']') s of
(x,_:y) -> (pTrms (tail x), pTrm y)
_ -> ([],pTrm s)
_ -> ([], pTrm s)
-}
string2ident :: String -> Err Ident
string2ident s = return $ string2var s
{-
-- reads the Haskell datatype
readGrammar :: String -> Err GrammarST
readGrammar s = case [x | (x,t) <- reads s, ("","") <- lex t] of
[x] -> return x
[] -> Bad "no parse of Grammar"
_ -> Bad "ambiguous parse of Grammar"
-}
|
