Got GFCC to JavaScript compilation working. Variants are still printed in a weird way.

src/GF/JavaScript/AbsJS.hs

@@ -13,14 +13,26 @@ data Element =
   deriving (Eq,Ord,Show)
 
 data Stmt =
-   Compound [Stmt]
- | ReturnVoid
- | Return Expr
+   SCompound [Stmt]
+ | SReturnVoid
+ | SReturn Expr
+ | SDeclOrExpr DeclOrExpr
+  deriving (Eq,Ord,Show)
+
+data DeclOrExpr =
+   Decl [DeclVar]
+ | DExpr Expr
+  deriving (Eq,Ord,Show)
+
+data DeclVar =
+   DVar Ident
+ | DInit Ident Expr
   deriving (Eq,Ord,Show)
 
 data Expr =
-   ENew Ident [Expr]
- | EMember Expr Expr
+   EAssign Expr Expr
+ | ENew Ident [Expr]
+ | EMember Expr Ident
  | EIndex Expr Expr
  | ECall Expr [Expr]
  | EVar Ident
@@ -31,5 +43,6 @@ data Expr =
  | EFalse
  | ENull
  | EThis
+ | EFun [Ident] [Stmt]
   deriving (Eq,Ord,Show)
 

src/GF/JavaScript/JS.cf

@@ -8,14 +8,24 @@ separator Element "" ;
 
 separator Ident "," ;
 
-Compound.   Stmt ::= "{" [Stmt] "}" ;
-ReturnVoid. Stmt ::= "return" ";" ;
-Return.     Stmt ::= "return" Expr ";" ;
+SCompound.   Stmt ::= "{" [Stmt] "}" ;
+SReturnVoid. Stmt ::= "return" ";" ;
+SReturn.     Stmt ::= "return" Expr ";" ;
+SDeclOrExpr. Stmt ::= DeclOrExpr ";" ;
 separator Stmt "" ;
 
+Decl.  DeclOrExpr ::= "var" [DeclVar];
+DExpr. DeclOrExpr ::= Expr ;
+
+DVar.  DeclVar ::= Ident ;
+DInit. DeclVar ::= Ident "=" Expr ;
+separator DeclVar "," ;
+
+EAssign. Expr13 ::= Expr14 "=" Expr13 ;
+
 ENew.    Expr14 ::= "new" Ident "(" [Expr] ")" ;
 
-EMember. Expr15 ::= Expr15 "." Expr16 ;
+EMember. Expr15 ::= Expr15 "." Ident ;
 EIndex.  Expr15 ::= Expr15 "[" Expr "]" ;
 ECall.   Expr15 ::= Expr15 "(" [Expr] ")" ;
 
@@ -27,6 +37,7 @@ ETrue.   Expr16 ::= "true" ;
 EFalse.  Expr16 ::= "false" ;
 ENull.   Expr16 ::= "null" ;
 EThis.   Expr16 ::= "this" ;
+EFun.    Expr16 ::= "function" "(" [Ident] ")" "{" [Stmt] "}" ;
 
 separator Expr "," ;
 coercions Expr 16 ;

src/GF/JavaScript/LexJS.x

@@ -16,7 +16,7 @@ $i = [$l $d _ ']          -- identifier character
 $u = [\0-\255]          -- universal: any character
 
 @rsyms =    -- symbols and non-identifier-like reserved words
-   \( | \) | \{ | \} | \, | \; | \. | \[ | \]
+   \( | \) | \{ | \} | \, | \; | \= | \. | \[ | \]
 
 :-
 
@@ -77,7 +77,7 @@ eitherResIdent tv s = treeFind resWords
                               | s > a  = treeFind right
                               | s == a = t
 
-resWords = b "null" (b "function" (b "false" N N) (b "new" N N)) (b "this" (b "return" N N) (b "true" N N))
+resWords = b "return" (b "new" (b "function" (b "false" N N) N) (b "null" N N)) (b "true" (b "this" N N) (b "var" N N))
    where b s = B s (TS s)
 
 unescapeInitTail :: String -> String

src/GF/JavaScript/ParJS.y

@@ -20,6 +20,7 @@ import GF.JavaScript.ErrM
  '}' { PT _ (TS "}") }
  ',' { PT _ (TS ",") }
  ';' { PT _ (TS ";") }
+ '=' { PT _ (TS "=") }
  '.' { PT _ (TS ".") }
  '[' { PT _ (TS "[") }
  ']' { PT _ (TS "]") }
@@ -30,6 +31,7 @@ import GF.JavaScript.ErrM
  'return' { PT _ (TS "return") }
  'this' { PT _ (TS "this") }
  'true' { PT _ (TS "true") }
+ 'var' { PT _ (TS "var") }
 
 L_ident  { PT _ (TV $$) }
 L_integ  { PT _ (TI $$) }
@@ -66,9 +68,10 @@ ListIdent : {- empty -} { [] }
 
 
 Stmt :: { Stmt }
-Stmt : '{' ListStmt '}' { Compound (reverse $2) } 
-  | 'return' ';' { ReturnVoid }
-  | 'return' Expr ';' { Return $2 }
+Stmt : '{' ListStmt '}' { SCompound (reverse $2) } 
+  | 'return' ';' { SReturnVoid }
+  | 'return' Expr ';' { SReturn $2 }
+  | DeclOrExpr ';' { SDeclOrExpr $1 }
 
 
 ListStmt :: { [Stmt] }
@@ -76,13 +79,34 @@ ListStmt : {- empty -} { [] }
   | ListStmt Stmt { flip (:) $1 $2 }
 
 
+DeclOrExpr :: { DeclOrExpr }
+DeclOrExpr : 'var' ListDeclVar { Decl $2 } 
+  | Expr { DExpr $1 }
+
+
+DeclVar :: { DeclVar }
+DeclVar : Ident { DVar $1 } 
+  | Ident '=' Expr { DInit $1 $3 }
+
+
+ListDeclVar :: { [DeclVar] }
+ListDeclVar : {- empty -} { [] } 
+  | DeclVar { (:[]) $1 }
+  | DeclVar ',' ListDeclVar { (:) $1 $3 }
+
+
+Expr13 :: { Expr }
+Expr13 : Expr14 '=' Expr13 { EAssign $1 $3 } 
+  | Expr14 { $1 }
+
+
 Expr14 :: { Expr }
 Expr14 : 'new' Ident '(' ListExpr ')' { ENew $2 $4 } 
   | Expr15 { $1 }
 
 
 Expr15 :: { Expr }
-Expr15 : Expr15 '.' Expr16 { EMember $1 $3 } 
+Expr15 : Expr15 '.' Ident { EMember $1 $3 } 
   | Expr15 '[' Expr ']' { EIndex $1 $3 }
   | Expr15 '(' ListExpr ')' { ECall $1 $3 }
   | Expr16 { $1 }
@@ -97,6 +121,7 @@ Expr16 : Ident { EVar $1 }
   | 'false' { EFalse }
   | 'null' { ENull }
   | 'this' { EThis }
+  | 'function' '(' ListIdent ')' '{' ListStmt '}' { EFun $3 (reverse $6) }
   | '(' Expr ')' { $2 }
 
 
@@ -158,10 +183,6 @@ Expr12 :: { Expr }
 Expr12 : Expr13 { $1 } 
 
 
-Expr13 :: { Expr }
-Expr13 : Expr14 { $1 } 
-
-
 
 {
 

src/GF/JavaScript/PrintJS.hs

@@ -102,18 +102,36 @@ instance Print Element where
 
 instance Print Stmt where
   prt i e = case e of
-   Compound stmts -> prPrec i 0 (concatD [doc (showString "{") , prt 0 stmts , doc (showString "}")])
-   ReturnVoid  -> prPrec i 0 (concatD [doc (showString "return") , doc (showString ";")])
-   Return expr -> prPrec i 0 (concatD [doc (showString "return") , prt 0 expr , doc (showString ";")])
+   SCompound stmts -> prPrec i 0 (concatD [doc (showString "{") , prt 0 stmts , doc (showString "}")])
+   SReturnVoid  -> prPrec i 0 (concatD [doc (showString "return") , doc (showString ";")])
+   SReturn expr -> prPrec i 0 (concatD [doc (showString "return") , prt 0 expr , doc (showString ";")])
+   SDeclOrExpr declorexpr -> prPrec i 0 (concatD [prt 0 declorexpr , doc (showString ";")])
 
   prtList es = case es of
    [] -> (concatD [])
    x:xs -> (concatD [prt 0 x , prt 0 xs])
 
+instance Print DeclOrExpr where
+  prt i e = case e of
+   Decl declvars -> prPrec i 0 (concatD [doc (showString "var") , prt 0 declvars])
+   DExpr expr -> prPrec i 0 (concatD [prt 0 expr])
+
+
+instance Print DeclVar where
+  prt i e = case e of
+   DVar id -> prPrec i 0 (concatD [prt 0 id])
+   DInit id expr -> prPrec i 0 (concatD [prt 0 id , doc (showString "=") , prt 0 expr])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   [x] -> (concatD [prt 0 x])
+   x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
+
 instance Print Expr where
   prt i e = case e of
+   EAssign expr0 expr -> prPrec i 13 (concatD [prt 14 expr0 , doc (showString "=") , prt 13 expr])
    ENew id exprs -> prPrec i 14 (concatD [doc (showString "new") , prt 0 id , doc (showString "(") , prt 0 exprs , doc (showString ")")])
-   EMember expr0 expr -> prPrec i 15 (concatD [prt 15 expr0 , doc (showString ".") , prt 16 expr])
+   EMember expr id -> prPrec i 15 (concatD [prt 15 expr , doc (showString ".") , prt 0 id])
    EIndex expr0 expr -> prPrec i 15 (concatD [prt 15 expr0 , doc (showString "[") , prt 0 expr , doc (showString "]")])
    ECall expr exprs -> prPrec i 15 (concatD [prt 15 expr , doc (showString "(") , prt 0 exprs , doc (showString ")")])
    EVar id -> prPrec i 16 (concatD [prt 0 id])
@@ -124,6 +142,7 @@ instance Print Expr where
    EFalse  -> prPrec i 16 (concatD [doc (showString "false")])
    ENull  -> prPrec i 16 (concatD [doc (showString "null")])
    EThis  -> prPrec i 16 (concatD [doc (showString "this")])
+   EFun ids stmts -> prPrec i 16 (concatD [doc (showString "function") , doc (showString "(") , prt 0 ids , doc (showString ")") , doc (showString "{") , prt 0 stmts , doc (showString "}")])
 
   prtList es = case es of
    [] -> (concatD [])

src/GF/JavaScript/SkelJS.hs

@@ -27,15 +27,29 @@ transElement x = case x of
 
 transStmt :: Stmt -> Result
 transStmt x = case x of
-  Compound stmts  -> failure x
-  ReturnVoid  -> failure x
-  Return expr  -> failure x
+  SCompound stmts  -> failure x
+  SReturnVoid  -> failure x
+  SReturn expr  -> failure x
+  SDeclOrExpr declorexpr  -> failure x
+
+
+transDeclOrExpr :: DeclOrExpr -> Result
+transDeclOrExpr x = case x of
+  Decl declvars  -> failure x
+  DExpr expr  -> failure x
+
+
+transDeclVar :: DeclVar -> Result
+transDeclVar x = case x of
+  DVar id  -> failure x
+  DInit id expr  -> failure x
 
 
 transExpr :: Expr -> Result
 transExpr x = case x of
+  EAssign expr0 expr  -> failure x
   ENew id exprs  -> failure x
-  EMember expr0 expr  -> failure x
+  EMember expr id  -> failure x
   EIndex expr0 expr  -> failure x
   ECall expr exprs  -> failure x
   EVar id  -> failure x
@@ -46,6 +60,7 @@ transExpr x = case x of
   EFalse  -> failure x
   ENull  -> failure x
   EThis  -> failure x
+  EFun ids stmts  -> failure x