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63 lines
2.0 KiB
Haskell
63 lines
2.0 KiB
Haskell
----------------------------------------------------------------------
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-- |
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-- Module : CFtoGrammar
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-- Maintainer : AR
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/04/21 16:21:09 $
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-- > CVS $Author: bringert $
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-- > CVS $Revision: 1.7 $
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--
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-- 26\/1\/2000 -- 18\/4 -- 24\/3\/2004
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-----------------------------------------------------------------------------
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module GF.CF.CFtoGrammar (cf2grammar) where
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import GF.Infra.Ident
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import GF.Grammar.Grammar
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import qualified GF.Source.AbsGF as A
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import qualified GF.Source.GrammarToSource as S
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import GF.Grammar.Macros
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import GF.CF.CF
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import GF.CF.CFIdent
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import GF.CF.PPrCF
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import GF.Data.Operations
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import Data.List (nub)
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import Data.Char (isSpace)
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cf2grammar :: CF -> [A.TopDef]
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cf2grammar cf = concatMap S.trAnyDef (abs ++ conc) where
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rules = rulesOfCF cf
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abs = cats ++ funs
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conc = lintypes ++ lins
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cats = [(cat, AbsCat (yes []) (yes [])) |
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cat <- nub (concat (map cf2cat rules))] ----notPredef cat
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lintypes = [(cat, CncCat (yes defLinType) nope nope) | (cat,AbsCat _ _) <- cats]
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(funs,lins) = unzip (map cf2rule rules)
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cf2cat :: CFRule -> [Ident]
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cf2cat (_,(cat, items)) = map cfCat2Ident $ cat : [c | CFNonterm c <- items]
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cf2rule :: CFRule -> ((Ident,Info),(Ident,Info))
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cf2rule (fun, (cat, items)) = (def,ldef) where
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f = cfFun2Ident fun
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def = (f, AbsFun (yes (mkProd (args', Cn (cfCat2Ident cat), []))) nope)
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args0 = zip (map (identV "x") [0..]) items
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args = [(v, Cn (cfCat2Ident c)) | (v, CFNonterm c) <- args0]
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args' = [(zIdent "_", Cn (cfCat2Ident c)) | (_, CFNonterm c) <- args0]
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ldef = (f, CncFun
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Nothing
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(yes (mkAbs (map fst args)
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(mkRecord (const theLinLabel) [foldconcat (map mkIt args0)])))
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nope)
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mkIt (v, CFNonterm _) = P (Vr v) theLinLabel
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mkIt (_, CFTerm (RegAlts [a])) = K a
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mkIt _ = K "" --- regexp not recognized in input CF ; use EBNF for this
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foldconcat [] = K ""
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foldconcat tt = foldr1 C tt
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