modernized parser in EmbedAPI

examples/tutorial/embedded/LexMath.gf

@@ -0,0 +1,8 @@
+interface LexMath = open Syntax in {
+
+  oper
+    even_A  : A ;
+    odd_A   : A ;
+    prime_A : A ;
+
+} 

examples/tutorial/embedded/LexMathEng.gf

@@ -0,0 +1,8 @@
+instance LexMathEng of LexMath = open SyntaxEng, ParadigmsEng in {
+
+  oper
+    even_A  = mkA "even" ;
+    odd_A   = mkA "odd" ;
+    prime_A = mkA "prime" ;
+
+}

examples/tutorial/embedded/LexMathFre.gf

@@ -0,0 +1,8 @@
+instance LexMathFre of LexMath = open SyntaxFre, ParadigmsFre in {
+
+  oper
+    even_A = mkA "pair" ;
+    odd_A = mkA "impair" ;
+    prime_A = mkA "premier" ;
+
+}

examples/tutorial/embedded/Makefile

@@ -0,0 +1,18 @@
+all: gf hs run
+
+gf:
+	echo "pm | wf math.gfcm" | gf MathEng.gf MathFre.gf
+
+hs: gf
+	echo "pg -printer=haskell | wf haskell/GSyntax.hs" | gf math.gfcm
+
+run: hs
+	ghc --make -o ./math -ihaskell haskell/Run.hs
+	strip math
+
+clean: 
+	rm -f *.gfc *.gfr haskell/*.o haskell/*.hi
+
+distclean:
+	rm -f GSyntax.hs math math.gfcm *.gfc *.gfr haskell/*.o haskell/*.hi
+

examples/tutorial/embedded/Math.gf

@@ -0,0 +1,14 @@
+abstract Math = {
+
+  cat Answer ; Question ; Object ;
+
+  fun 
+    Even   : Object -> Question ;
+    Odd    : Object -> Question ;
+    Prime  : Object -> Question ;
+    Number : Int -> Object ;
+
+    Yes : Answer ;
+    No  : Answer ;
+
+}

examples/tutorial/embedded/MathEng.gf

@@ -0,0 +1,6 @@
+--# -path=.:present:prelude:mathematical
+
+concrete MathEng of Math = MathI with
+  (Syntax = SyntaxEng), 
+  (Symbol = SymbolEng),
+  (LexMath = LexMathEng) ;

examples/tutorial/embedded/MathFre.gf

@@ -0,0 +1,6 @@
+--# -path=.:present:prelude:mathematical
+
+concrete MathFre of Math = MathI with
+  (Syntax = SyntaxFre), 
+  (Symbol = SymbolFre), 
+  (LexMath = LexMathFre) ;

examples/tutorial/embedded/MathI.gf

@@ -0,0 +1,23 @@
+incomplete concrete MathI of Math = 
+  open Syntax, Symbol, LexMath in {
+
+  flags startcat = Question ; lexer = textlit ; unlexer = text ;
+
+  lincat 
+    Answer   = Text ;
+    Question = Text ;
+    Object   = NP ;
+
+  lin 
+    Even   = questAdj even_A ;
+    Odd    = questAdj odd_A ;
+    Prime  = questAdj prime_A ;
+    Number n = mkNP (IntPN n) ;
+
+    Yes = mkText yes_Phr ;
+    No  = mkText no_Phr ;
+
+  oper
+    questAdj : A -> NP -> Text = \adj,x -> mkText (mkQS (mkCl x adj)) ;
+
+}

examples/tutorial/embedded/TransferLoop.hs

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+module Main where
+
+import GF.Embed.EmbedAPI
+import GSyntax
+
+main :: IO () 
+main = do
+  gr <- file2grammar "math.gfcm"
+  loop (translate answerTree gr)
+
+loop :: (String -> String) -> IO ()
+loop trans = do 
+  s <- getLine
+  if s == "quit" then putStrLn "bye" else do  
+    putStrLn $ trans s
+    loop trans
+
+translate :: (Tree -> Tree) -> MultiGrammar -> String -> String
+translate tr gr = unlines . map transLine . lines where
+  transLine s = case parseAllLang gr (startCat gr) s of
+    (lg,t:_):_ -> linearize gr lg (tr t)
+    _ -> "NO PARSE"
+
+answerTree :: Tree -> Tree
+answerTree = gf . answer . fg
+
+answer :: GQuestion -> GAnswer
+answer p = case p of
+  GOdd x   -> test odd x
+  GEven x  -> test even x
+  GPrime x -> test prime x
+
+value :: GObject -> Int
+value e = case e of
+  GNumber (GInt i) -> fromInteger i
+
+test :: (Int -> Bool) -> GObject -> GAnswer
+test f x = if f (value x) then GYes else GNo
+
+prime :: Int -> Bool
+prime = (< 8) ----

examples/tutorial/embedded/Translator.hs

@@ -0,0 +1,16 @@
+module Main where
+
+import GF.Embed.EmbedAPI
+import System (getArgs)
+
+main :: IO () 
+main = do
+  file:_ <- getArgs
+  gr <- file2grammar file
+  interact (translate gr)
+
+translate :: MultiGrammar -> String -> String
+translate gr = unlines . map transLine . lines where
+  transLine s =
+    let (lang,tree:_):_ = parseAllLang gr (startCat gr) s
+    in unlines [linearize gr lg tree | lg <- languages gr, lg /= lang]      

examples/tutorial/embedded/TranslatorLoop.hs

@@ -0,0 +1,23 @@
+module Main where
+
+import GF.Embed.EmbedAPI
+import System (getArgs)
+
+main :: IO () 
+main = do
+  file:_ <- getArgs
+  gr <- file2grammar file
+  loop (translate gr)
+
+loop :: (String -> String) -> IO ()
+loop trans = do 
+  s <- getLine
+  if s == "quit" then putStrLn "bye" else do  
+    putStrLn $ trans s
+    loop trans
+
+translate :: MultiGrammar -> String -> String
+translate gr = unlines . map transLine . lines where
+  transLine s = case parseAllLang gr (startCat gr) s of
+    (lg,t:_):_ -> unlines [linearize gr l t | l <- languages gr, l /= lg]
+    _ -> "NO PARSE"

examples/tutorial/embedded/haskell/GSyntax.hs

@@ -0,0 +1,100 @@
+module GSyntax where
+
+import GF.Infra.Ident
+import GF.Grammar.Grammar
+import GF.Grammar.PrGrammar
+import GF.Grammar.Macros
+import GF.Data.Operations
+----------------------------------------------------
+-- automatic translation from GF to Haskell
+----------------------------------------------------
+
+class Gf a where gf :: a -> Trm
+class Fg a where fg :: Trm -> a
+
+newtype GString = GString String  deriving Show
+
+instance Gf GString where
+  gf (GString s) = K s
+
+instance Fg GString where
+  fg t =
+    case termForm t of
+      Ok ([], K s ,[]) -> GString s
+      _ -> error ("no GString " ++ prt t)
+
+newtype GInt = GInt Integer  deriving Show
+
+instance Gf GInt where
+  gf (GInt s) = EInt s
+
+instance Fg GInt where
+  fg t =
+    case termForm t of
+      Ok ([], EInt s ,[]) -> GInt s
+      _ -> error ("no GInt " ++ prt t)
+
+newtype GFloat = GFloat Double  deriving Show
+
+instance Gf GFloat where
+  gf (GFloat s) = EFloat s
+
+instance Fg GFloat where
+  fg t =
+    case termForm t of
+      Ok ([], EFloat s ,[]) -> GFloat s
+      _ -> error ("no GFloat " ++ prt t)
+
+----------------------------------------------------
+-- below this line machine-generated
+----------------------------------------------------
+
+data GAnswer =
+   GYes 
+ | GNo 
+  deriving Show
+
+data GObject = GNumber GInt 
+  deriving Show
+
+data GQuestion =
+   GPrime GObject 
+ | GOdd GObject 
+ | GEven GObject 
+  deriving Show
+
+
+instance Gf GAnswer where
+ gf GYes = appqc "Math" "Yes" []
+ gf GNo = appqc "Math" "No" []
+
+instance Gf GObject where gf (GNumber x1) = appqc "Math" "Number" [gf x1]
+
+instance Gf GQuestion where
+ gf (GPrime x1) = appqc "Math" "Prime" [gf x1]
+ gf (GOdd x1) = appqc "Math" "Odd" [gf x1]
+ gf (GEven x1) = appqc "Math" "Even" [gf x1]
+
+
+instance Fg GAnswer where
+ fg t =
+  case termForm t of
+    Ok ([], Q (IC "Math") (IC "Yes"),[]) -> GYes 
+    Ok ([], Q (IC "Math") (IC "No"),[]) -> GNo 
+    _ -> error ("no Answer " ++ prt t)
+
+instance Fg GObject where
+ fg t =
+  case termForm t of
+    Ok ([], Q (IC "Math") (IC "Number"),[x1]) -> GNumber (fg x1)
+    _ -> error ("no Object " ++ prt t)
+
+instance Fg GQuestion where
+ fg t =
+  case termForm t of
+    Ok ([], Q (IC "Math") (IC "Prime"),[x1]) -> GPrime (fg x1)
+    Ok ([], Q (IC "Math") (IC "Odd"),[x1]) -> GOdd (fg x1)
+    Ok ([], Q (IC "Math") (IC "Even"),[x1]) -> GEven (fg x1)
+    _ -> error ("no Question " ++ prt t)
+
+

examples/tutorial/embedded/haskell/Run.hs

@@ -0,0 +1,38 @@
+module Main where
+
+import GSyntax
+import GF.Embed.EmbedAPI
+
+main :: IO () 
+main = do
+  gr <- file2grammar "math.gfcm"
+  loop gr
+
+loop :: MultiGrammar -> IO ()
+loop gr = do
+  s <- getLine
+  interpret gr s
+  loop gr
+
+interpret :: MultiGrammar -> String -> IO ()
+interpret gr s = do
+  let ltss = parseAllLang gr "Question" s
+  case ltss of
+    [] ->  putStrLn "no parse"
+    (l,t:_):_ -> putStrLn $ linearize gr l $ gf $ answer $ fg t
+
+answer :: GQuestion -> GAnswer
+answer p = case p of
+  GOdd x   -> test odd x
+  GEven x  -> test even x
+  GPrime x -> test prime x
+
+value :: GObject -> Int
+value e = case e of
+  GNumber (GInt i) -> fromInteger i
+
+test :: (Int -> Bool) -> GObject -> GAnswer
+test f x = if f (value x) then GYes else GNo
+
+prime :: Int -> Bool
+prime = (< 8) ----