mirror of
https://github.com/GrammaticalFramework/gf-core.git
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123 lines
4.8 KiB
Haskell
123 lines
4.8 KiB
Haskell
----------------------------------------------------------------------
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-- |
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-- Maintainer : PL
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/06/17 14:15:18 $
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-- > CVS $Author: bringert $
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-- > CVS $Revision: 1.3 $
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--
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-- Converting GFC to SimpleGFC
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--
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-- the conversion might fail if the GFC grammar has dependent or higher-order types
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-----------------------------------------------------------------------------
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module GF.OldParsing.ConvertGFCtoSimple where
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import qualified GF.Canon.AbsGFC as A
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import qualified GF.Infra.Ident as I
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import GF.OldParsing.SimpleGFC
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import GF.Canon.GFC
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import GF.Canon.MkGFC (grammar2canon)
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import qualified GF.Canon.Look as Look (lookupLin, allParamValues, lookupLincat)
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import qualified GF.Canon.CMacros as CMacros (defLinType)
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import GF.Data.Operations (err, errVal)
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import qualified GF.Infra.Modules as M
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import GF.System.Tracing
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import GF.Printing.PrintParser
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import GF.Printing.PrintSimplifiedTerm
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----------------------------------------------------------------------
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type Env = (CanonGrammar, I.Ident)
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convertGrammar :: Env -> Grammar
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convertGrammar gram = trace2 "language" (show (snd gram)) $
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tracePrt "#simple-rules total" (show . length) $
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[ convertAbsFun gram fun typing |
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A.Mod (A.MTAbs modname) _ _ _ defs <- modules,
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A.AbsDFun fun typing _ <- defs ]
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where A.Gr modules = grammar2canon (fst gram)
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convertAbsFun :: Env -> I.Ident -> A.Exp -> Rule
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convertAbsFun gram fun aTyping
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= -- trace2 "absFun" (show fun) $
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Rule fun sTyping sTerm
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where sTyping = convertTyping [] aTyping
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sTerm = do lin <- lookupLin gram fun
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return (convertTerm gram lin, convertCType gram cType)
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cType = lookupCType gram sTyping
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convertTyping :: [Decl] -> A.Exp -> Typing
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-- convertTyping env tp | trace2 "typing" (prt env ++ " / " ++ prt tp) False = undefined
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convertTyping env (A.EProd x a b)
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= convertTyping ((x ::: convertType [] a) : env) b
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convertTyping env a = (convertType [] a, reverse env)
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convertType :: [Atom] -> A.Exp -> Type
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-- convertType args tp | trace2 "type" (prt args ++ " / " ++ prt tp) False = undefined
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convertType args (A.EApp a (A.EAtom at)) = convertType (convertAtom at : args) a
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convertType args (A.EAtom at) = convertCat at :@ args
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convertAtom :: A.Atom -> Atom
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convertAtom (A.AC con) = ACon con
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convertAtom (A.AV var) = AVar var
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convertCat :: A.Atom -> Cat
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convertCat (A.AC (A.CIQ _ cat)) = cat
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convertCat at = error $ "convertCat: " ++ show at
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convertCType :: Env -> A.CType -> CType
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convertCType gram (A.RecType rec)
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= RecT [ (lbl, convertCType gram ctype) | A.Lbg lbl ctype <- rec ]
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convertCType gram (A.Table ptype vtype)
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= TblT (convertCType gram ptype) (convertCType gram vtype)
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convertCType gram ct@(A.Cn con) = ConT con $ map (convertTerm gram) $ groundTerms gram ct
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convertCType gram (A.TStr) = StrT
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convertCType gram (A.TInts n) = error "convertCType: cannot handle 'TInts' constructor"
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convertTerm :: Env -> A.Term -> Term
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convertTerm gram (A.Arg arg) = convertArgVar arg
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convertTerm gram (A.Par con terms) = con :^ map (convertTerm gram) terms
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convertTerm gram (A.LI var) = Var var
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convertTerm gram (A.R rec) = Rec [ (lbl, convertTerm gram term) | A.Ass lbl term <- rec ]
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convertTerm gram (A.P term lbl) = convertTerm gram term +. lbl
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convertTerm gram (A.V ctype terms) = Tbl [ (convertTerm gram pat, convertTerm gram term) |
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(pat, term) <- zip (groundTerms gram ctype) terms ]
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convertTerm gram (A.T ctype tbl) = Tbl [ (convertPatt pat, convertTerm gram term) |
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A.Cas pats term <- tbl, pat <- pats ]
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convertTerm gram (A.S term sel) = convertTerm gram term +! convertTerm gram sel
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convertTerm gram (A.C term1 term2) = convertTerm gram term1 ?++ convertTerm gram term2
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convertTerm gram (A.FV terms) = Variants (map (convertTerm gram) terms)
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convertTerm gram (A.K tok) = Token tok
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convertTerm gram (A.E) = Empty
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convertTerm gram (A.I con) = error "convertTerm: cannot handle 'I' constructor"
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convertTerm gram (A.EInt int) = error "convertTerm: cannot handle 'EInt' constructor"
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convertArgVar :: A.ArgVar -> Term
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convertArgVar (A.A cat nr) = Arg (fromInteger nr) cat emptyPath
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convertArgVar (A.AB cat bindings nr) = Arg (fromInteger nr) cat emptyPath
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convertPatt (A.PC con pats) = con :^ map convertPatt pats
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convertPatt (A.PV x) = Var x
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convertPatt (A.PW) = Wildcard
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convertPatt (A.PR rec) = Rec [ (lbl, convertPatt pat) | A.PAss lbl pat <- rec ]
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convertPatt (A.PI n) = error "convertPatt: cannot handle 'PI' constructor"
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----------------------------------------------------------------------
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lookupLin gram fun = err fail Just $
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Look.lookupLin (fst gram) (A.CIQ (snd gram) fun)
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--lookupCType :: Env -> Typing -> CType
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lookupCType env (cat :@ _, _) = errVal CMacros.defLinType $
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Look.lookupLincat (fst env) (A.CIQ (snd env) cat)
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groundTerms :: Env -> A.CType -> [A.Term]
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groundTerms gram ctype = err error id $
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Look.allParamValues (fst gram) ctype
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