diff options
Diffstat (limited to 'src/GF/Compile/PGrammar.hs')
| -rw-r--r-- | src/GF/Compile/PGrammar.hs | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/GF/Compile/PGrammar.hs b/src/GF/Compile/PGrammar.hs new file mode 100644 index 000000000..06d9fc72e --- /dev/null +++ b/src/GF/Compile/PGrammar.hs @@ -0,0 +1,58 @@ +module PGrammar 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 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 $ case s of + c:'_':i -> identV (readIntArg i,[c]) --- + _ -> zIdent 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" +-} |
