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80 lines
2.4 KiB
Haskell
80 lines
2.4 KiB
Haskell
----------------------------------------------------------------------
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-- |
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-- Module : Transfer
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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 16:23:53 $
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-- > CVS $Author: bringert $
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-- > CVS $Revision: 1.5 $
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--
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-- linearize, parse, etc, by transfer. AR 9\/10\/2003
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-----------------------------------------------------------------------------
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module GF.UseGrammar.Transfer where
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import GF.Grammar.Grammar
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import GF.Grammar.Values
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import GF.Grammar.AbsCompute
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import qualified GF.Canon.GFC as GFC
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import GF.Grammar.LookAbs
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import GF.Grammar.MMacros
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import GF.Grammar.Macros
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import GF.Grammar.PrGrammar
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import GF.Grammar.TypeCheck
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import GF.Infra.Ident
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import GF.Data.Operations
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import qualified Transfer.Core.Abs as T
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import Control.Monad
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-- transfer is done in T.Exp - we only need these conversions.
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exp2core :: Ident -> Exp -> T.Exp
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exp2core f = T.EApp (T.EVar (var f)) . exp2c where
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exp2c e = case e of
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App f a -> T.EApp (exp2c f) (exp2c a)
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Abs x b -> T.EAbs (T.PVVar (var x)) (exp2c b) ---- should be syntactic abstr
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Q _ c -> T.EVar (var c)
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QC _ c -> T.EVar (var c)
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K s -> T.EStr s
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EInt i -> T.EInteger $ toInteger i
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Meta m -> T.EMeta (T.TMeta (prt m)) ---- which meta symbol?
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Vr x -> T.EVar (var x) ---- should be syntactic var
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var x = T.CIdent $ prt x
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core2exp :: T.Exp -> Exp
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core2exp e = case e of
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T.EApp f a -> App (core2exp f) (core2exp a)
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T.EAbs (T.PVVar x) b -> Abs (var x) (core2exp b) ---- only from syntactic abstr
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T.EVar c -> Vr (var c) -- GF annotates to Q or QC
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T.EStr s -> K s
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T.EInteger i -> EInt $ fromInteger i
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T.EMeta _ -> uExp -- meta symbol 0, refreshed by GF
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where
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var :: T.CIdent -> Ident
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var (T.CIdent x) = zIdent x
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-- The following are now obsolete (30/11/2005)
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-- linearize, parse, etc, by transfer. AR 9/10/2003
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doTransfer :: GFC.CanonGrammar -> Ident -> Tree -> Err Tree
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doTransfer gr tra t = do
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cat <- liftM snd $ val2cat $ valTree t
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f <- lookupTransfer gr tra cat
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e <- compute gr $ App f $ tree2exp t
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annotate gr e
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useByTransfer :: (Tree -> Err a) -> GFC.CanonGrammar -> Ident -> (Tree -> Err a)
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useByTransfer lin gr tra t = doTransfer gr tra t >>= lin
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mkByTransfer :: (a -> Err [Tree]) -> GFC.CanonGrammar -> Ident -> (a -> Err [Tree])
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mkByTransfer parse gr tra s = parse s >>= mapM (doTransfer gr tra)
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