mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-09 04:59:31 -06:00
557 lines
19 KiB
Haskell
557 lines
19 KiB
Haskell
module SourceToGrammar where
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import qualified Grammar as G
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import qualified PrGrammar as GP
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import qualified Modules as GM
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import qualified Macros as M
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import qualified Update as U
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import qualified Option as GO
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import qualified ModDeps as GD
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import Ident
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import AbsGF
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import PrintGF
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import RemoveLiT --- for bw compat
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import Operations
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import Option
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import Monad
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import Char
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-- based on the skeleton Haskell module generated by the BNF converter
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type Result = Err String
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failure :: Show a => a -> Err b
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failure x = Bad $ "Undefined case: " ++ show x
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transIdent :: Ident -> Err Ident
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transIdent x = case x of
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x -> return x
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transGrammar :: Grammar -> Err G.SourceGrammar
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transGrammar x = case x of
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Gr moddefs -> do
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moddefs' <- mapM transModDef moddefs
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GD.mkSourceGrammar moddefs'
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transModDef :: ModDef -> Err (Ident, G.SourceModInfo)
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transModDef x = case x of
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MMain id0 id concspecs -> do
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id0' <- transIdent id0
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id' <- transIdent id
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concspecs' <- mapM transConcSpec concspecs
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return $ (id0', GM.ModMainGrammar (GM.MainGrammar id' concspecs'))
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MModule compl mtyp body -> do
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let mstat' = transComplMod compl
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(trDef, mtyp', id') <- case mtyp of
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MTAbstract id -> do
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id' <- transIdent id
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return (transAbsDef, GM.MTAbstract, id')
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MTResource id -> mkModRes id GM.MTResource body
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MTConcrete id open -> do
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id' <- transIdent id
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open' <- transIdent open
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return (transCncDef, GM.MTConcrete open', id')
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MTTransfer id a b -> do
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id' <- transIdent id
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a' <- transOpen a
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b' <- transOpen a
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return (transAbsDef, GM.MTTransfer a' b', id')
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MTInterface id -> mkModRes id GM.MTInterface body
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MTInstance id open -> do
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open' <- transIdent open
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mkModRes id (GM.MTInstance open') body
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case body of
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MBody extends opens defs -> do
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extends' <- transExtend extends
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opens' <- transOpens opens
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defs0 <- mapM trDef $ getTopDefs defs
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defs' <- U.buildAnyTree [d | Left ds <- defs0, d <- ds]
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flags' <- return [f | Right fs <- defs0, f <- fs]
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return (id',GM.ModMod (GM.Module mtyp' mstat' flags' extends' opens' defs'))
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MReuse _ -> do
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return (id', GM.ModMod (GM.Module mtyp' mstat' [] Nothing [] NT))
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MWith m opens -> do
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m' <- transIdent m
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opens' <- mapM transOpen opens
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return (id', GM.ModWith mtyp' mstat' m' opens')
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where
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mkModRes id mtyp body = do
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id' <- transIdent id
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case body of
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MReuse c -> do
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c' <- transIdent c
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mtyp' <- trMReuseType mtyp c'
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return (transResDef, GM.MTReuse mtyp', id')
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_ -> return (transResDef, mtyp, id')
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trMReuseType mtyp c = case mtyp of
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GM.MTInterface -> return $ GM.MRInterface c
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GM.MTInstance op -> return $ GM.MRInstance c op
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GM.MTResource -> return $ GM.MRResource c
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transComplMod :: ComplMod -> GM.ModuleStatus
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transComplMod x = case x of
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CMCompl -> GM.MSComplete
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CMIncompl -> GM.MSIncomplete
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getTopDefs :: [TopDef] -> [TopDef]
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getTopDefs x = x
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transConcSpec :: ConcSpec -> Err (GM.MainConcreteSpec Ident)
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transConcSpec x = case x of
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ConcSpec id concexp -> do
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id' <- transIdent id
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(m,mi,mo) <- transConcExp concexp
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return $ GM.MainConcreteSpec id' m mi mo
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transConcExp :: ConcExp ->
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Err (Ident, Maybe (GM.OpenSpec Ident),Maybe (GM.OpenSpec Ident))
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transConcExp x = case x of
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ConcExp id transfers -> do
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id' <- transIdent id
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trs <- mapM transTransfer transfers
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tin <- case [o | Left o <- trs] of
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[o] -> return $ Just o
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[] -> return $ Nothing
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_ -> Bad "ambiguous transfer in"
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tout <- case [o | Right o <- trs] of
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[o] -> return $ Just o
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[] -> return $ Nothing
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_ -> Bad "ambiguous transfer out"
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return (id',tin,tout)
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transTransfer :: Transfer ->
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Err (Either (GM.OpenSpec Ident)(GM.OpenSpec Ident))
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transTransfer x = case x of
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TransferIn open -> liftM Left $ transOpen open
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TransferOut open -> liftM Right $ transOpen open
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transExtend :: Extend -> Err (Maybe Ident)
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transExtend x = case x of
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Ext id -> transIdent id >>= return . Just
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NoExt -> return Nothing
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transOpens :: Opens -> Err [GM.OpenSpec Ident]
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transOpens x = case x of
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NoOpens -> return []
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Opens opens -> mapM transOpen opens
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transOpen :: Open -> Err (GM.OpenSpec Ident)
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transOpen x = case x of
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OName id -> liftM (GM.OSimple GM.OQNormal) $ transIdent id
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OQualQO q id -> liftM2 GM.OSimple (transQualOpen q) (transIdent id)
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OQual q id m -> liftM3 GM.OQualif (transQualOpen q) (transIdent id) (transIdent m)
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transQualOpen :: QualOpen -> Err GM.OpenQualif
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transQualOpen x = case x of
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QOCompl -> return GM.OQNormal
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QOInterface -> return GM.OQInterface
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QOIncompl -> return GM.OQIncomplete
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transAbsDef :: TopDef -> Err (Either [(Ident, G.Info)] [GO.Option])
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transAbsDef x = case x of
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DefCat catdefs -> do
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catdefs' <- mapM transCatDef catdefs
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returnl [(cat, G.AbsCat (yes cont) nope) | (cat,cont) <- catdefs']
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DefFun fundefs -> do
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fundefs' <- mapM transFunDef fundefs
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returnl [(fun, G.AbsFun (yes typ) nope) | (funs,typ) <- fundefs', fun <- funs]
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DefDef defs -> do
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defs' <- liftM concat $ mapM getDefsGen defs
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returnl [(c, G.AbsFun nope pe) | (c,(_,pe)) <- defs']
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DefData ds -> do
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ds' <- mapM transDataDef ds
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returnl $
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[(c, G.AbsCat nope (yes ps)) | (c,ps) <- ds'] ++
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[(f, G.AbsFun nope (yes G.EData)) | (_,fs) <- ds', tf <- fs, f <- funs tf]
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DefTrans defs -> do
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defs' <- liftM concat $ mapM getDefsGen defs
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returnl [(c, G.AbsTrans f) | (c,(_,Yes f)) <- defs']
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DefFlag defs -> liftM Right $ mapM transFlagDef defs
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_ -> Bad $ "illegal definition in abstract module:" ++++ printTree x
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where
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-- to get data constructors as terms
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funs t = case t of
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G.Cn f -> [f]
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G.Q _ f -> [f]
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G.QC _ f -> [f]
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_ -> []
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returnl :: a -> Err (Either a b)
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returnl = return . Left
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transFlagDef :: FlagDef -> Err GO.Option
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transFlagDef x = case x of
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FlagDef f x -> return $ GO.Opt (prIdent f,[prIdent x])
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transCatDef :: CatDef -> Err (Ident, G.Context)
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transCatDef x = case x of
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CatDef id ddecls -> liftM2 (,) (transIdent id)
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(mapM transDDecl ddecls >>= return . concat)
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transFunDef :: FunDef -> Err ([Ident], G.Type)
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transFunDef x = case x of
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FunDef ids typ -> liftM2 (,) (mapM transIdent ids) (transExp typ)
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transDataDef :: DataDef -> Err (Ident,[G.Term])
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transDataDef x = case x of
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DataDef id ds -> liftM2 (,) (transIdent id) (mapM transData ds)
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where
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transData d = case d of
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DataId id -> liftM G.Cn $ transIdent id
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DataQId id0 id -> liftM2 G.QC (transIdent id0) (transIdent id)
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transResDef :: TopDef -> Err (Either [(Ident, G.Info)] [GO.Option])
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transResDef x = case x of
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DefPar pardefs -> do
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pardefs' <- mapM transParDef pardefs
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returnl $ [(p, G.ResParam (if null pars
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then nope -- abstract param type
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else (yes pars))) | (p,pars) <- pardefs']
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++ [(f, G.ResValue (yes (M.mkProdSimple co (G.Cn p)))) |
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(p,pars) <- pardefs', (f,co) <- pars]
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DefOper defs -> do
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defs' <- liftM concat $ mapM getDefs defs
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returnl [(f, G.ResOper pt pe) | (f,(pt,pe)) <- defs']
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DefLintype defs -> do
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defs' <- liftM concat $ mapM getDefs defs
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returnl [(f, G.ResOper pt pe) | (f,(pt,pe)) <- defs']
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DefFlag defs -> liftM Right $ mapM transFlagDef defs
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_ -> Bad $ "illegal definition form in resource" +++ printTree x
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transParDef :: ParDef -> Err (Ident, [G.Param])
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transParDef x = case x of
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ParDef id params -> liftM2 (,) (transIdent id) (mapM transParConstr params)
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ParDefAbs id -> liftM2 (,) (transIdent id) (return [])
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_ -> Bad $ "illegal definition in resource:" ++++ printTree x
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transCncDef :: TopDef -> Err (Either [(Ident, G.Info)] [GO.Option])
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transCncDef x = case x of
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DefLincat defs -> do
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defs' <- liftM concat $ mapM transPrintDef defs
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returnl [(f, G.CncCat (yes t) nope nope) | (f,t) <- defs']
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DefLindef defs -> do
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defs' <- liftM concat $ mapM getDefs defs
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returnl [(f, G.CncCat pt pe nope) | (f,(pt,pe)) <- defs']
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DefLin defs -> do
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defs' <- liftM concat $ mapM getDefs defs
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returnl [(f, G.CncFun Nothing pe nope) | (f,(_,pe)) <- defs']
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DefPrintCat defs -> do
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defs' <- liftM concat $ mapM transPrintDef defs
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returnl [(f, G.CncCat nope nope (yes e)) | (f,e) <- defs']
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DefPrintFun defs -> do
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defs' <- liftM concat $ mapM transPrintDef defs
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returnl [(f, G.CncFun Nothing nope (yes e)) | (f,e) <- defs']
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DefPrintOld defs -> do -- a guess, for backward compatibility
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defs' <- liftM concat $ mapM transPrintDef defs
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returnl [(f, G.CncFun Nothing nope (yes e)) | (f,e) <- defs']
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DefFlag defs -> liftM Right $ mapM transFlagDef defs
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DefPattern defs -> do
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defs' <- liftM concat $ mapM getDefs defs
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let defs2 = [(f, termInPattern t) | (f,(_,Yes t)) <- defs']
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returnl [(f, G.CncFun Nothing (yes t) nope) | (f,t) <- defs2]
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_ -> Bad $ "illegal definition in concrete syntax:" ++++ printTree x
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transPrintDef :: PrintDef -> Err [(Ident,G.Term)]
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transPrintDef x = case x of
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PrintDef id exp -> do
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(ids,e) <- liftM2 (,) (mapM transIdent id) (transExp exp)
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return $ [(i,e) | i <- ids]
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getDefsGen :: Def -> Err [(Ident, (G.Perh G.Type, G.Perh G.Term))]
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getDefsGen d = case d of
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DDecl ids t -> do
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ids' <- mapM transIdent ids
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t' <- transExp t
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return [(i,(yes t', nope)) | i <- ids']
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DDef ids e -> do
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ids' <- mapM transIdent ids
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e' <- transExp e
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return [(i,(nope, yes e')) | i <- ids']
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DFull ids t e -> do
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ids' <- mapM transIdent ids
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t' <- transExp t
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e' <- transExp e
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return [(i,(yes t', yes e')) | i <- ids']
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DPatt id patts e -> do
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id' <- transIdent id
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ps' <- mapM transPatt patts
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e' <- transExp e
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return [(id',(nope, yes (G.Eqs [(ps',e')])))]
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-- sometimes you need this special case, e.g. in linearization rules
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getDefs :: Def -> Err [(Ident, (G.Perh G.Type, G.Perh G.Term))]
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getDefs d = case d of
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DPatt id patts e -> do
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id' <- transIdent id
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xs <- mapM tryMakeVar patts
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e' <- transExp e
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return [(id',(nope, yes (M.mkAbs xs e')))]
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_ -> getDefsGen d
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-- accepts a pattern that is either a variable or a wild card
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tryMakeVar :: Patt -> Err Ident
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tryMakeVar p = do
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p' <- transPatt p
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case p' of
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G.PV i -> return i
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G.PW -> return identW
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_ -> Bad $ "not a legal pattern in lambda binding" +++ GP.prt p'
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transExp :: Exp -> Err G.Term
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transExp x = case x of
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EIdent id -> liftM G.Vr $ transIdent id
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EConstr id -> liftM G.Con $ transIdent id
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ECons id -> liftM G.Cn $ transIdent id
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EQConstr m c -> liftM2 G.QC (transIdent m) (transIdent c)
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EQCons m c -> liftM2 G.Q (transIdent m) (transIdent c)
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EString str -> return $ G.K str
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ESort sort -> liftM G.Sort $ transSort sort
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EInt n -> return $ G.EInt $ fromInteger n
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EMeta -> return $ M.meta $ M.int2meta 0
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EEmpty -> return G.Empty
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EStrings [] -> return G.Empty
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EStrings str -> return $ foldr1 G.C $ map G.K $ words str
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ERecord defs -> erecord2term defs
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ETupTyp _ _ -> do
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let tups t = case t of
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ETupTyp x y -> tups x ++ [y] -- right-associative parsing
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_ -> [t]
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es <- mapM transExp $ tups x
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return $ G.RecType $ M.tuple2recordType es
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ETuple tuplecomps -> do
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es <- mapM transExp [e | TComp e <- tuplecomps]
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return $ G.R $ M.tuple2record es
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EProj exp id -> liftM2 G.P (transExp exp) (trLabel id)
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EApp exp0 exp -> liftM2 G.App (transExp exp0) (transExp exp)
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ETable cases -> liftM (G.T G.TRaw) (transCases cases)
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ETTable exp cases ->
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liftM2 (\t c -> G.T (G.TTyped t) c) (transExp exp) (transCases cases)
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ECase exp cases -> do
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exp' <- transExp exp
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cases' <- transCases cases
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return $ G.S (G.T G.TRaw cases') exp'
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ECTable binds exp -> liftM2 M.mkCTable (mapM transBind binds) (transExp exp)
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EVariants exps -> liftM G.FV $ mapM transExp exps
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EPre exp alts -> liftM2 (curry G.Alts) (transExp exp) (mapM transAltern alts)
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EStrs exps -> liftM G.Strs $ mapM transExp exps
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ESelect exp0 exp -> liftM2 G.S (transExp exp0) (transExp exp)
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EExtend exp0 exp -> liftM2 G.ExtR (transExp exp0) (transExp exp)
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EAbstr binds exp -> liftM2 M.mkAbs (mapM transBind binds) (transExp exp)
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ETyped exp0 exp -> liftM2 G.Typed (transExp exp0) (transExp exp)
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EProd decl exp -> liftM2 M.mkProdSimple (transDecl decl) (transExp exp)
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ETType exp0 exp -> liftM2 G.Table (transExp exp0) (transExp exp)
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EConcat exp0 exp -> liftM2 G.C (transExp exp0) (transExp exp)
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EGlue exp0 exp -> liftM2 G.Glue (transExp exp0) (transExp exp)
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ELet defs exp -> do
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exp' <- transExp exp
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defs0 <- mapM locdef2fields defs
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defs' <- mapM tryLoc $ concat defs0
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return $ M.mkLet defs' exp'
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where
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tryLoc (c,(mty,Just e)) = return (c,(mty,e))
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tryLoc (c,_) = Bad $ "local definition of" +++ GP.prt c +++ "without value"
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ELetb defs exp -> transExp $ ELet defs exp
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EWhere exp defs -> transExp $ ELet defs exp
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ELString (LString str) -> return $ G.K str
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ELin id -> liftM G.LiT $ transIdent id
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EEqs eqs -> liftM G.Eqs $ mapM transEquation eqs
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_ -> Bad $ "translation not yet defined for" +++ printTree x ----
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--- this is complicated: should we change Exp or G.Term ?
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erecord2term :: [LocDef] -> Err G.Term
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erecord2term ds = do
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ds' <- mapM locdef2fields ds
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mkR $ concat ds'
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where
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mkR fs = do
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fs' <- transF fs
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return $ case fs' of
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Left ts -> G.RecType ts
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Right ds -> G.R ds
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transF [] = return $ Left [] --- empty record always interpreted as record type
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transF fs@(f:_) = case f of
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(lab,(Just ty,Nothing)) -> mapM tryRT fs >>= return . Left
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_ -> mapM tryR fs >>= return . Right
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tryRT f = case f of
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(lab,(Just ty,Nothing)) -> return (M.ident2label lab,ty)
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_ -> Bad $ "illegal record type field" +++ GP.prt (fst f) --- manifest fields ?!
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tryR f = case f of
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(lab,(mty, Just t)) -> return (M.ident2label lab,(mty,t))
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_ -> Bad $ "illegal record field" +++ GP.prt (fst f)
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locdef2fields d = case d of
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LDDecl ids t -> do
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labs <- mapM transIdent ids
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t' <- transExp t
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return [(lab,(Just t',Nothing)) | lab <- labs]
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LDDef ids e -> do
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labs <- mapM transIdent ids
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e' <- transExp e
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return [(lab,(Nothing, Just e')) | lab <- labs]
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LDFull ids t e -> do
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labs <- mapM transIdent ids
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t' <- transExp t
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e' <- transExp e
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return [(lab,(Just t', Just e')) | lab <- labs]
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trLabel :: Label -> Err G.Label
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trLabel x = case x of
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-- this case is for bward compatibiity and should be removed
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LIdent (IC ('v':ds)) | all isDigit ds -> return $ G.LVar $ readIntArg ds
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LIdent (IC s) -> return $ G.LIdent s
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LVar x -> return $ G.LVar $ fromInteger x
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transSort :: Sort -> Err String
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transSort x = case x of
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_ -> return $ printTree x
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transPatt :: Patt -> Err G.Patt
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transPatt x = case x of
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PW -> return G.wildPatt
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PV id -> liftM G.PV $ transIdent id
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PC id patts -> liftM2 G.PC (transIdent id) (mapM transPatt patts)
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PCon id -> liftM2 G.PC (transIdent id) (return [])
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PInt n -> return $ G.PInt (fromInteger n)
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PStr str -> return $ G.PString str
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PR pattasss -> do
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let (lss,ps) = unzip [(ls,p) | PA ls p <- pattasss]
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ls = map LIdent $ concat lss
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liftM G.PR $ liftM2 zip (mapM trLabel ls) (mapM transPatt ps)
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PTup pcs ->
|
|
liftM (G.PR . M.tuple2recordPatt) (mapM transPatt [e | PTComp e <- pcs])
|
|
PQ id0 id -> liftM3 G.PP (transIdent id0) (transIdent id) (return [])
|
|
PQC id0 id patts ->
|
|
liftM3 G.PP (transIdent id0) (transIdent id) (mapM transPatt patts)
|
|
|
|
transBind :: Bind -> Err Ident
|
|
transBind x = case x of
|
|
BIdent id -> transIdent id
|
|
BWild -> return identW
|
|
|
|
transDecl :: Decl -> Err [G.Decl]
|
|
transDecl x = case x of
|
|
DDec binds exp -> do
|
|
xs <- mapM transBind binds
|
|
exp' <- transExp exp
|
|
return [(x,exp') | x <- xs]
|
|
DExp exp -> liftM (return . M.mkDecl) $ transExp exp
|
|
|
|
transCases :: [Case] -> Err [G.Case]
|
|
transCases = liftM concat . mapM transCase
|
|
|
|
transCase :: Case -> Err [G.Case]
|
|
transCase (Case pattalts exp) = do
|
|
patts <- mapM transPatt [p | AltP p <- pattalts]
|
|
exp' <- transExp exp
|
|
return [(p,exp') | p <- patts]
|
|
|
|
transEquation :: Equation -> Err G.Equation
|
|
transEquation x = case x of
|
|
Equ apatts exp -> liftM2 (,) (mapM transPatt apatts) (transExp exp)
|
|
|
|
transAltern :: Altern -> Err (G.Term, G.Term)
|
|
transAltern x = case x of
|
|
Alt exp0 exp -> liftM2 (,) (transExp exp0) (transExp exp)
|
|
|
|
transParConstr :: ParConstr -> Err G.Param
|
|
transParConstr x = case x of
|
|
ParConstr id ddecls -> do
|
|
id' <- transIdent id
|
|
ddecls' <- mapM transDDecl ddecls
|
|
return (id',concat ddecls')
|
|
|
|
transDDecl :: DDecl -> Err [G.Decl]
|
|
transDDecl x = case x of
|
|
DDDec binds exp -> transDecl $ DDec binds exp
|
|
DDExp exp -> transDecl $ DExp exp
|
|
|
|
-- to deal with the old format, sort judgements in three modules, forming
|
|
-- their names from a given string, e.g. file name or overriding user-given string
|
|
|
|
transOldGrammar :: Options -> FilePath -> OldGrammar -> Err G.SourceGrammar
|
|
transOldGrammar opts name0 x = case x of
|
|
OldGr includes topdefs -> do --- includes must be collected separately
|
|
let moddefs = sortTopDefs topdefs
|
|
g1 <- transGrammar $ Gr moddefs
|
|
removeLiT g1 --- needed for bw compatibility with an obsolete feature
|
|
where
|
|
sortTopDefs ds = [mkAbs a,mkRes r,mkCnc c]
|
|
where (a,r,c) = foldr srt ([],[],[]) ds
|
|
srt d (a,r,c) = case d of
|
|
DefCat catdefs -> (d:a,r,c)
|
|
DefFun fundefs -> (d:a,r,c)
|
|
DefDef defs -> (d:a,r,c)
|
|
DefData pardefs -> (d:a,r,c)
|
|
DefPar pardefs -> (a,d:r,c)
|
|
DefOper defs -> (a,d:r,c)
|
|
DefLintype defs -> (a,d:r,c)
|
|
DefLincat defs -> (a,r,d:c)
|
|
DefLindef defs -> (a,r,d:c)
|
|
DefLin defs -> (a,r,d:c)
|
|
DefPattern defs -> (a,r,d:c)
|
|
DefFlag defs -> (a,r,d:c) --- a guess
|
|
DefPrintCat printdefs -> (a,r,d:c)
|
|
DefPrintFun printdefs -> (a,r,d:c)
|
|
DefPrintOld printdefs -> (a,r,d:c)
|
|
mkAbs a = MModule q (MTAbstract absName) (MBody ne (Opens []) (topDefs a))
|
|
mkRes r = MModule q (MTResource resName) (MBody ne (Opens []) (topDefs r))
|
|
mkCnc r = MModule q (MTConcrete cncName absName)
|
|
(MBody ne (Opens [OName resName]) (topDefs r))
|
|
topDefs t = t
|
|
ne = NoExt
|
|
q = CMCompl
|
|
|
|
name = maybe name0 (++ ".gf") $ getOptVal opts useName
|
|
absName = identC $ maybe topic id $ getOptVal opts useAbsName
|
|
resName = identC $ maybe ("Res" ++ lang) id $ getOptVal opts useResName
|
|
cncName = identC $ maybe lang id $ getOptVal opts useCncName
|
|
|
|
(beg,rest) = span (/='.') name
|
|
(topic,lang) = case rest of -- to avoid overwriting old files
|
|
".gf" -> ("Abs" ++ beg,"Cnc" ++ beg)
|
|
[] -> ("Abs" ++ beg,"Cnc" ++ beg)
|
|
_:s -> (beg, takeWhile (/='.') s)
|
|
|
|
transInclude :: Include -> Err [FilePath]
|
|
transInclude x = case x of
|
|
NoIncl -> return []
|
|
Incl filenames -> return $ map trans filenames
|
|
where
|
|
trans f = case f of
|
|
FString s -> s
|
|
FIdent (IC s) -> s
|
|
FSlash filename -> '/' : trans filename
|
|
FDot filename -> '.' : trans filename
|
|
FMinus filename -> '-' : trans filename
|
|
FAddId (IC s) filename -> s ++ trans filename
|
|
|
|
termInPattern :: G.Term -> G.Term
|
|
termInPattern t = M.mkAbs xx $ G.R [(s, (Nothing, toP body))] where
|
|
toP t = case t of
|
|
G.Vr x -> G.P t s
|
|
_ -> M.composSafeOp toP t
|
|
s = G.LIdent "s"
|
|
(xx,body) = abss [] t
|
|
abss xs t = case t of
|
|
G.Abs x b -> abss (x:xs) b
|
|
_ -> (reverse xs,t)
|