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https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-15 15:59:32 -06:00
84 lines
2.2 KiB
Haskell
84 lines
2.2 KiB
Haskell
module GetGrammar where
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import Operations
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import qualified ErrM as E ----
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import UseIO
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import Grammar
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import Modules
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import PrGrammar
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import qualified AbsGF as A
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import SourceToGrammar
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---- import Macros
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---- import Rename
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import Option
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--- import Custom
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import ParGF
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import qualified LexGF as L
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import ReadFiles ----
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import List (nub)
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import Monad (foldM)
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-- this module builds the internal GF grammar that is sent to the type checker
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getSourceModule :: FilePath -> IOE SourceModule
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getSourceModule file = do
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string <- readFileIOE file
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let tokens = myLexer string
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mo1 <- ioeErr $ err2err $ pModDef tokens
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ioeErr $ transModDef mo1
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-- for old GF format with includes
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getOldGrammar :: Options -> FilePath -> IOE SourceGrammar
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getOldGrammar opts file = do
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defs <- parseOldGrammarFiles file
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let g = A.OldGr A.NoIncl defs
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ioeErr $ transOldGrammar opts file g
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parseOldGrammarFiles :: FilePath -> IOE [A.TopDef]
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parseOldGrammarFiles file = do
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putStrE $ "reading grammar of old format" +++ file
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(_, g) <- getImports "" ([],[]) file
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return g -- now we can throw away includes
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where
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getImports oldInitPath (oldImps, oldG) f = do
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(path,s) <- readFileLibraryIOE oldInitPath f
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if not (elem path oldImps)
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then do
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(imps,g) <- parseOldGrammar path
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foldM (getImports (initFilePath path)) (path : oldImps, g ++ oldG) imps
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else
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return (oldImps, oldG)
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parseOldGrammar :: FilePath -> IOE ([FilePath],[A.TopDef])
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parseOldGrammar file = do
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putStrE $ "reading old file" +++ file
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s <- ioeIO $ readFileIf file
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A.OldGr incl topdefs <- ioeErr $ err2err $ pOldGrammar $ oldLexer $ fixNewlines s
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includes <- ioeErr $ transInclude incl
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return (includes, topdefs)
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----
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err2err :: E.Err a -> Err a
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err2err (E.Ok v) = Ok v
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err2err (E.Bad s) = Bad s
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ioeEErr = ioeErr . err2err
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-- To resolve the new reserved words: change them by turning the final letter to Z.
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--- There is a risk of clash.
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oldLexer :: String -> [L.Token]
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oldLexer = map change . L.tokens where
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change t = case t of
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(L.PT p (L.TS s)) | elem s new -> (L.PT p (L.TV (init s ++ "Z")))
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_ -> t
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new = words $ "abstract concrete interface incomplete " ++
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"instance out open resource reuse transfer with where"
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