forked from GitHub/gf-core
efa4bc4d62
The following are the outcomes:
- Predef.nonExist is fully supported by both the Haskell and the C runtimes
- Predef.BIND is now an internal compiler defined token. For now
it behaves just as usual for the Haskell runtime, i.e. it generates &+.
However, the special treatment will let us to handle it properly in
the C runtime.
- This required a major change in the PGF format since both
nonExist and BIND may appear inside 'pre' and this was not supported
before.
100 lines
4.2 KiB
Haskell
100 lines
4.2 KiB
Haskell
module GF.Compile.PGFtoJS (pgf2js) where
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import PGF.CId
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import PGF.Data hiding (mkStr)
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import qualified PGF.Macros as M
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import qualified GF.JavaScript.AbsJS as JS
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import qualified GF.JavaScript.PrintJS as JS
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import GF.Data.ErrM
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import GF.Infra.Option
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import Control.Monad (mplus)
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import Data.Array.Unboxed (UArray)
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import qualified Data.Array.IArray as Array
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import Data.Maybe (fromMaybe)
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import Data.Map (Map)
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import qualified Data.Set as Set
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import qualified Data.Map as Map
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import qualified Data.IntMap as IntMap
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pgf2js :: PGF -> String
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pgf2js pgf =
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JS.printTree $ JS.Program [JS.ElStmt $ JS.SDeclOrExpr $ JS.Decl [JS.DInit (JS.Ident n) grammar]]
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where
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n = showCId $ absname pgf
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as = abstract pgf
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cs = Map.assocs (concretes pgf)
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start = showCId $ M.lookStartCat pgf
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grammar = new "GFGrammar" [js_abstract, js_concrete]
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js_abstract = abstract2js start as
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js_concrete = JS.EObj $ map concrete2js cs
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abstract2js :: String -> Abstr -> JS.Expr
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abstract2js start ds = new "GFAbstract" [JS.EStr start, JS.EObj $ map absdef2js (Map.assocs (funs ds))]
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absdef2js :: (CId,(Type,Int,Maybe [Equation],Double,BCAddr)) -> JS.Property
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absdef2js (f,(typ,_,_,_,_)) =
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let (args,cat) = M.catSkeleton typ in
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JS.Prop (JS.IdentPropName (JS.Ident (showCId f))) (new "Type" [JS.EArray [JS.EStr (showCId x) | x <- args], JS.EStr (showCId cat)])
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lit2js (LStr s) = JS.EStr s
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lit2js (LInt n) = JS.EInt n
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lit2js (LFlt d) = JS.EDbl d
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concrete2js :: (CId,Concr) -> JS.Property
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concrete2js (c,cnc) =
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JS.Prop l (new "GFConcrete" [mapToJSObj (lit2js) $ cflags cnc,
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JS.EObj $ [JS.Prop (JS.IntPropName cat) (JS.EArray (map frule2js (Set.toList set))) | (cat,set) <- IntMap.toList (productions cnc)],
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JS.EArray $ (map ffun2js (Array.elems (cncfuns cnc))),
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JS.EArray $ (map seq2js (Array.elems (sequences cnc))),
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JS.EObj $ map cats (Map.assocs (cnccats cnc)),
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JS.EInt (totalCats cnc)])
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where
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l = JS.IdentPropName (JS.Ident (showCId c))
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litslins = [JS.Prop (JS.StringPropName "Int") (JS.EFun [children] [JS.SReturn $ new "Arr" [JS.EIndex (JS.EVar children) (JS.EInt 0)]]),
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JS.Prop (JS.StringPropName "Float") (JS.EFun [children] [JS.SReturn $ new "Arr" [JS.EIndex (JS.EVar children) (JS.EInt 0)]]),
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JS.Prop (JS.StringPropName "String") (JS.EFun [children] [JS.SReturn $ new "Arr" [JS.EIndex (JS.EVar children) (JS.EInt 0)]])]
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cats (c,CncCat start end _) = JS.Prop (JS.IdentPropName (JS.Ident (showCId c))) (JS.EObj [JS.Prop (JS.IdentPropName (JS.Ident "s")) (JS.EInt start)
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,JS.Prop (JS.IdentPropName (JS.Ident "e")) (JS.EInt end)])
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mkStr :: String -> JS.Expr
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mkStr s = new "Str" [JS.EStr s]
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mkSeq :: [JS.Expr] -> JS.Expr
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mkSeq [x] = x
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mkSeq xs = new "Seq" xs
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argIdent :: Integer -> JS.Ident
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argIdent n = JS.Ident ("x" ++ show n)
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children :: JS.Ident
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children = JS.Ident "cs"
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frule2js :: Production -> JS.Expr
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frule2js (PApply funid args) = new "Apply" [JS.EInt funid, JS.EArray (map farg2js args)]
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frule2js (PCoerce arg) = new "Coerce" [JS.EInt arg]
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farg2js (PArg hypos fid) = new "PArg" (map (JS.EInt . snd) hypos ++ [JS.EInt fid])
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ffun2js (CncFun f lins) = new "CncFun" [JS.EStr (showCId f), JS.EArray (map JS.EInt (Array.elems lins))]
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seq2js :: Array.Array DotPos Symbol -> JS.Expr
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seq2js seq = JS.EArray [sym2js s | s <- Array.elems seq]
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sym2js :: Symbol -> JS.Expr
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sym2js (SymCat n l) = new "SymCat" [JS.EInt n, JS.EInt l]
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sym2js (SymLit n l) = new "SymLit" [JS.EInt n, JS.EInt l]
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sym2js (SymVar n l) = new "SymVar" [JS.EInt n, JS.EInt l]
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sym2js (SymKS t) = new "SymKS" [JS.EStr t]
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sym2js (SymKP ts alts) = new "SymKP" [JS.EArray (map sym2js ts), JS.EArray (map alt2js alts)]
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sym2js SymNE = new "SymNE" []
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sym2js SymBIND = new "SymKS" [JS.EStr "&+"]
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alt2js (ps,ts) = new "Alt" [JS.EArray (map sym2js ps), JS.EArray (map JS.EStr ts)]
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new :: String -> [JS.Expr] -> JS.Expr
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new f xs = JS.ENew (JS.Ident f) xs
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mapToJSObj :: (a -> JS.Expr) -> Map CId a -> JS.Expr
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mapToJSObj f m = JS.EObj [ JS.Prop (JS.IdentPropName (JS.Ident (showCId k))) (f v) | (k,v) <- Map.toList m ]
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