viewcvs.cgi/parser/parser.ml

open Location
open Ast
open Ident

(*
let ()  = Grammar.error_verbose := true
*)

let gram    = Grammar.gcreate (Wlexer.lexer Wlexer.token Wlexer.latin1_engine)

let true_atom = Atoms.mk_ascii "true"
let false_atom = Atoms.mk_ascii "false"
let true_type = Types.atom (Atoms.atom true_atom)
let false_type = Types.atom (Atoms.atom false_atom)

let parse_ident = Encodings.Utf8.mk_latin1

let id_dummy = ident (U.mk "$$$")
let atom s = Atoms.mk (parse_ident s)
let label s = LabelPool.mk (parse_ident s)
let ident s = ident (parse_ident s)

let prog    = Grammar.Entry.create gram "prog"
let top_phrases   = Grammar.Entry.create gram "toplevel phrases"
let expr    = Grammar.Entry.create gram "expression"
let pat     = Grammar.Entry.create gram "type/pattern expression"
let regexp  = Grammar.Entry.create gram "type/pattern regexp"
let const   = Grammar.Entry.create gram "scalar constant"
                
let exp pos e = LocatedExpr (loc_of_pos pos,e)

let rec multi_prod loc = function
  | [ x ] -> x
  | x :: l -> mk loc (Prod (x, multi_prod loc l))
  | [] -> assert false
      
let rec tuple = function
  | [ x ] -> x
  | x :: l -> Pair (x, tuple l)
  | [] -> assert false

let tuple_queue = 
  List.fold_right (fun x q -> Pair (x, q))


let char = mknoloc (Internal (Types.char Chars.any))
let string_regexp = Star (Elem char)
               
let cst_nil =  Cst (Types.Atom Sequence.nil_atom)
                 
let seq_of_string pos s =
  let s =  Encodings.Utf8.mk s in
  let (pos,_) = pos in
  let rec aux pos i j =
    if Encodings.Utf8.equal_index i j then []
    else
      let (len,i) = Encodings.Utf8.next s i in
      let (c,i) = Encodings.Utf8.next s i in
      ((pos,pos+len),c) :: (aux (pos + len) i j)
  in
  aux (pos+1) (Encodings.Utf8.start_index s) (Encodings.Utf8.end_index s)

let get_string s =
  let s = Encodings.Utf8.mk s in
  let b = Buffer.create 32 in
  let rec aux i j =
    if Encodings.Utf8.equal_index i j then ()
    else
      let (len,i) = Encodings.Utf8.next s i in
      let (c,i) = Encodings.Utf8.next s i in
      Encodings.Utf8.store b c;
      aux i j
  in
  aux (Encodings.Utf8.start_index s) (Encodings.Utf8.end_index s);
  Buffer.contents b

exception Error of string
let error (i,j) s = Location.raise_loc i j (Error s)

let make_record loc r =
  LabelMap.from_list (fun _ _ -> error loc "Duplicated record field") r

let parse_char loc s =
  let s = seq_of_string loc s in
  match s with
    | [ loc,c ] -> c
    | _ -> error loc "Character litteral must have length 1"

let char_list loc s = 
  let s = seq_of_string loc s in
  List.map (fun (loc,c) -> exp loc (Cst (Types.Char (Chars.mk_int c)))) s


let include_stack = ref []

let protect_exn f g =
  try let x = f () in g (); x
  with e -> g (); raise e

EXTEND
  GLOBAL: top_phrases prog expr pat regexp const;

  top_phrases: [
    [ l = LIST0 phrase; ";;" -> List.flatten l  ]
  ];

  prog: [
    [ l = LIST0 [ p = phrase ; OPT ";;" -> p ]; EOI -> List.flatten l ]
  ];

  phrase: [
    [ (f,p,e) = let_binding -> 
        if f then [ mk loc (FunDecl e) ] else
          [ mk loc (LetDecl (p,e)) ]
    | (_,p,e1) = let_binding; "in"; e2 = expr LEVEL "top"->
        [ mk loc (EvalStatement (exp loc (Match (e1,[p,e2])))) ]
    | "type"; x = UIDENT; "="; t = pat -> [ mk loc (TypeDecl (x,t)) ]
    | "type"; x = LIDENT -> error loc "Type identifiers must be capitalized"
    | "debug"; d = debug_directive -> [ mk loc (Debug d) ]
    | DIRECTIVE "#quit" -> [ mk loc (Directive `Quit) ]
    | DIRECTIVE "#env" -> [ mk loc (Directive `Env) ]
    | "include"; s = STRING2 ->
        let s = get_string s in
        protect_op "File inclusion";
        (* avoid looping; should issue an error ? *)
        if List.mem s !include_stack then [] 
        else (
          include_stack := s :: !include_stack;
          Location.push_source (`File s);
          protect_exn
            (fun () ->
               let chan = open_in s in
               let input = Stream.of_channel chan in
               let l = Grammar.Entry.parse prog input in
               close_in chan;
               l)
            (fun () ->
               Location.pop_source ();
               include_stack := List.tl !include_stack)
        )
    ] | 
    [ e = expr -> [ mk loc (EvalStatement e) ]
    ]
  ];

  debug_directive: [
    [ LIDENT "filter"; t = pat; p = pat -> `Filter(t,p)
    | LIDENT "accept"; p = pat -> `Accept p
    | LIDENT "compile"; t = pat; p = LIST1 pat -> `Compile (t,p)
    | LIDENT "sample"; t = pat -> `Sample t
    | LIDENT "subtype"; t1 = pat; t2 = pat -> `Subtype (t1,t2)
    ]
  ];

  keyword: [
    [ a = 
        [ "map" | "match" | "with" | "try" | "xtransform"
        | "if" | "then" | "else"
        | "transform" | "fun" | "in"
        | "let" | "type" | "debug" | "include"
        ]
        -> a
    ]
  ];

  expr: [
    "top" RIGHTA
    [ "match"; e = SELF; "with"; b = branches -> 
        exp loc (Match (e,b))
    | "try"; e = SELF; "with"; b = branches -> 
        exp loc (Try (e,b))
    | "map"; e = SELF; "with"; b = branches -> 
        exp loc (Map (e,b))
    | "xtransform"; e = SELF; "with"; b = branches -> 
        exp loc (Xtrans (e,b))
    | "if"; e = SELF; "then"; e1 = SELF; "else"; e2 = SELF ->
        let p1 = mk loc (Internal true_type)
        and p2 = mk loc (Internal false_type) in
        exp loc (Match (e, [p1,e1; p2,e2]))
    | "transform"; e = SELF; "with"; b = branches -> 
        exp loc (Transform (e,b))
    | "fun"; (f,a,b) = fun_decl ->
        exp loc (Abstraction { fun_name = f; fun_iface = a; fun_body = b })
    | (_,p,e1) = let_binding; "in"; e2 = expr LEVEL "top"->
        exp loc (Match (e1,[p,e2]))
    | e = expr; ":"; p = pat ->
        exp loc (Forget (e,p))
    ]

    
    | 
    [ e1 = expr; op = ["=" | "<=" | "<<" | ">>" | ">=" ]; e2 = expr -> 
        let op = match op with
          | "<<" -> "<"
          | ">>" -> ">"
          | s -> s in
        exp loc (Op (op,[e1;e2]))
    ]

    | 
    [ e1 = expr; op = ["+" | "-" | "@" ]; e2 = expr -> 
        exp loc (Op (op,[e1;e2]))
    | e = expr; "\\"; l = [LIDENT | UIDENT | keyword ] -> 
        exp loc (RemoveField (e, label l)) 
    ]
    |
    [ e1 = expr; op = ["*"]; e2 = expr -> exp loc (Op (op,[e1;e2]))  
    | e = expr; op = "/"; p = pat ->

        let tag = mk loc (Internal (Types.atom (Atoms.any))) in
        let att = mk loc (Internal Types.Record.any) in
        let any = mk loc (Internal (Types.any)) in
        let re = Star(Alt(SeqCapture(id_dummy,Elem p), Elem any)) in
        let ct = mk loc (Regexp (re,any)) in
        let p = mk loc (XmlT (tag, multi_prod loc [att;ct])) in
        let b = (p,  Var id_dummy) in
        exp loc (Transform (e,[b]))
    ]
    |
    [ e = expr;  "."; l = [LIDENT | UIDENT | keyword ] -> 
        exp loc (Dot (e, label l)) 
    ]  
 
    |
    [ op = [ LIDENT "flatten"
           | LIDENT "load_xml"
           | LIDENT "load_file" | LIDENT "load_file_utf8"
           | LIDENT "load_html"
           | LIDENT "print_xml" | LIDENT "print_xml_utf8"
           | LIDENT "print"
           | LIDENT "int_of"
           | LIDENT "string_of"
           | LIDENT "atom_of"
           | LIDENT "raise"
           ]; 
      e = expr -> exp loc (Op (op,[e]))
    | op = [ LIDENT "dump_to_file" | LIDENT "dump_to_file_utf8" ];
      e1 = expr LEVEL "no_appl"; e2 = expr -> exp loc (Op (op, [e1;e2])) 
    | e1 = SELF; LIDENT "div"; e2 = expr -> exp loc (Op ("/", [e1;e2]))
    | e1 = SELF; LIDENT "mod"; e2 = expr -> exp loc (Op ("mod", [e1;e2]))
    | e1 = SELF; e2 = expr -> exp loc (Apply (e1,e2))
    ]

    | "no_appl" 
    [ c = const -> exp loc (Cst c)
    | "("; l = LIST1 expr SEP ","; ")" -> exp loc (tuple l)
    | "[";  l = LIST0 seq_elem; e = OPT [ ";"; e = expr -> e ]; "]" ->
        let e = match e with Some e -> e | None -> cst_nil in
        let l = List.fold_right 
                  (fun x q ->
                     match x with
                       | `Elems l -> tuple_queue l q
                       | `Explode x -> Op ("@",[x;q])
                  ) l e
        in
        exp loc l
    | "<"; t = [ "("; e = expr; ")" -> e
               | a = [ LIDENT | UIDENT | keyword ] -> 
                   exp loc (Cst (Types.Atom (atom a))) ];
        a = expr_attrib_spec; ">"; c = expr ->
        exp loc (Xml (t, Pair (a,c)))
    | "{"; r = [ expr_record_spec | -> exp loc (RecordLitt LabelMap.empty) ]; "}" -> r
    | s = STRING2 ->
        exp loc (tuple (char_list loc s @ [cst_nil]))
    | a = LIDENT -> exp loc (Var (ident a))
    ]

  ];

  seq_elem: [
    [ x = STRING1 -> `Elems (char_list loc x)
    | e = expr LEVEL "no_appl" -> `Elems [e]
    | "!"; e = expr LEVEL "no_appl" -> `Explode e
    ]
  ];
          
  let_binding: [
    [ "let"; p = pat; "="; e = expr -> (false,p,e)
    | "let"; p = pat; ":"; t = pat; "="; e = expr -> (false,p, Forget (e,t))
    | "let"; "fun"; (f,a,b) = fun_decl ->
        let p = match f with 
          | Some x -> mk loc (Capture x)
          | _ -> failwith "Function name mandatory in let fun declarations"
        in
        let abst = { fun_name = f; fun_iface = a; fun_body = b } in
        let e = exp loc (Abstraction abst) in
        (true,p,e)
    ] 
  ];

 fun_decl: [
(* need an hack to do this, because both productions would
   match   [ OPT LIDENT; "("; pat ] .... *)
   [ f = OPT [ x = LIDENT -> ident x]; "("; p1 = pat LEVEL "no_arrow";
    res = [ "->"; p2 = pat;
            a = [ ";"; a = LIST0 arrow SEP ";" -> a | -> [] ];
            ")"; b = branches -> `Classic (p2,a,b)
          | ":"; targ1 = pat;
            args = LIST0 [ ","; arg = pat; ":"; targ = pat -> (arg,targ) ]; 
            ")"; ":"; tres = pat ; 
            "="; body = expr ->
              `Compact (targ1,args,tres,body)
          ] ->
      match res with
        | `Classic (p2,a,b) -> f,(p1,p2)::a,b
        | `Compact (targ1,args,tres,body) ->
            let args = (p1,targ1) :: args in
            let targ = multi_prod nopos (List.map snd args) in
            let arg = multi_prod nopos (List.map fst args) in
            let b = [arg, body] in
            let a = [targ,tres] in
            (f,a,b)
  ]
 ];

 arrow: [
    [ t1 = pat LEVEL "no_arrow"; "->"; t2 = pat -> (t1,t2)]
  ];

  branches: [
    [ OPT "|"; l = LIST1 branch SEP "|" -> l ]
  ];

  branch: [
    [ p = pat LEVEL "no_arrow"; "->"; e = expr -> (p,e) ]
  ];

          
  regexp: [ 
    [ x = regexp; "|"; y = regexp -> 
        match (x,y) with
          | Elem x, Elem y -> Elem (mk loc (Or (x,y)))
          | _ -> Alt (x,y) 
    ]
  | [ x = regexp; y = regexp -> Seq (x,y) ]
  | [ a = LIDENT; "::"; x = regexp -> SeqCapture (ident a,x) ]
  | [ x = regexp; "*" -> Star x
    | x = regexp; "*?" -> WeakStar x
    | x = regexp; "+" -> Seq (x, Star x)
    | x = regexp; "+?" -> Seq (x, WeakStar x)
    | x = regexp; "?" ->  Alt (x, Epsilon)
    | x = regexp; "??" -> Alt (Epsilon, x) ]
  | [ "("; x = regexp; ")" -> x
    | "("; a = LIDENT; ":="; c = const; ")" -> 
        Elem (mk loc (Constant ((ident a,c))))
    | UIDENT "PCDATA" -> string_regexp
    | i = STRING1; "--"; j = STRING1 ->
        let i = Chars.mk_int (parse_char loc i)
        and j = Chars.mk_int (parse_char loc j) in
        Elem (mk loc (Internal (Types.char (Chars.char_class i j))))
    |  s = STRING1 ->
        let s = seq_of_string loc s in
        List.fold_right
          (fun (loc,c) accu -> 
             let c = Chars.mk_int c in
             let c = Chars.atom c in
             Seq (Elem (mk loc (Internal (Types.char c))), accu))
          s
          Epsilon 
    | e = pat LEVEL "simple" -> Elem e
    ]
  ];

  pat: [ 
      [ x = pat; LIDENT "where"; 
        b = LIST1 [ a = UIDENT; "="; y = pat -> (a,y)
                  | LIDENT -> error loc "Type/pattern identifiers must be capitalized"
                  ] SEP "and"
            -> mk loc (Recurs (x,b)) ]
    | RIGHTA [ x = pat; "->"; y = pat -> mk loc (Arrow (x,y)) ]
    | "no_arrow" [ x = pat; "|"; y = pat -> mk loc (Or (x,y)) ] 
    | "simple" [ x = pat; "&"; y = pat -> mk loc (And (x,y)) 
               | x = pat; "\\"; y = pat -> mk loc (Diff (x,y)) ]
    | 
      [ "{"; r = record_spec; "}" -> mk loc (Record (true,r))
      | "{|"; r = record_spec; "|}" -> mk loc (Record (false,r))
      | LIDENT "_" -> mk loc (Internal Types.any)
      | a = LIDENT -> mk loc (Capture (ident a))
      | "("; a = LIDENT; ":="; c = const; ")" -> 
          mk loc (Constant (ident a,c))
      | a = UIDENT -> mk loc (PatVar a)
      | i = INT ; "--"; j = INT -> 
          let i =  Intervals.mk i 
          and j =  Intervals.mk j in
          mk loc (Internal (Types.interval (Intervals.bounded i j)))
      | i = INT -> 
          let i =  Intervals.mk i  in
          mk loc (Internal (Types.interval (Intervals.atom i)))
      | "*"; "--"; j = INT ->
          let j =  Intervals.mk j in
          mk loc (Internal (Types.interval (Intervals.left j)))
      | i = INT; "--"; "*" ->
          let i = Intervals.mk i in
          mk loc (Internal (Types.interval (Intervals.right i)))
      | i = char ->
          mk loc (Internal (Types.char (Chars.char_class i i)))
      | i = char ; "--"; j = char ->
          mk loc (Internal (Types.char (Chars.char_class i j)))
      | c = const -> mk loc (Internal (Types.constant c))
      | "("; l = LIST1 pat SEP ","; ")" -> multi_prod loc l
      | "["; r = [ r = regexp -> r | -> Epsilon ];
             q = [ ";"; q = pat -> q 
                 | -> mknoloc (Internal (Sequence.nil_type)) ]; 
             "]" -> mk loc (Regexp (r,q))
      | "<"; t =
        [ x = [ LIDENT | UIDENT | keyword ] ->
            let a = if x = "_" then Atoms.any else Atoms.atom (atom x) in
            mk loc (Internal (Types.atom a))
        | "("; t = pat; ")" -> t ];
        a = attrib_spec; ">"; c = pat ->
          mk loc (XmlT (t, multi_prod loc [a;c]))
      | s = STRING2 ->
          let s = seq_of_string loc s in
          let s = List.map 
                    (fun (loc,c) -> 
                       mk loc (Internal
                                 (Types.char
                                    (Chars.atom
                                       (Chars.mk_int c))))) s in
          let s = s @ [mk loc (Internal (Sequence.nil_type))] in
          multi_prod loc s
      ]
    
  ];

  record_spec:
    [ [ r = LIST0 [ l = [LIDENT | UIDENT | keyword ]; "=";
                  o = [ "?" -> true | -> false]; 
                  x = pat -> 
                    let x = if o then mk loc (Optional x) else x in
                    (label l, x)
                ] SEP ";" ->
          make_record loc r
      ] ];
  
  char:
    [ 
      [ c = STRING1 -> Chars.mk_int (parse_char loc c) ]
    ];
     

  const:
    [ 
      [ i = INT -> Types.Integer (Intervals.mk i)
      | "`"; a = [LIDENT | UIDENT | keyword ] -> Types.Atom (atom a)
      | c = char -> Types.Char c ]
    ];


  attrib_spec:
    [ [ r = record_spec -> mk loc (Record (true,r)) 
      | "("; t = pat; ")" -> t 
      | "{"; r = record_spec; "}" -> mk loc (Record (true,r))
      | "{|"; r = record_spec; "|}" -> mk loc (Record (false,r))
      ] ];

  expr_record_spec:
    [ [ r = LIST1
              [ l = [LIDENT | UIDENT | keyword ]; "="; x = expr -> 
                  (label l,x) ] 
              SEP ";" ->
          exp loc (RecordLitt (make_record loc r))
      ] ];
  
  expr_attrib_spec:
    [ [ r = expr_record_spec -> r ]
    | [ e = expr LEVEL "no_appl" -> e 
      | -> exp loc (RecordLitt (LabelMap.empty)) 
      ] 
    ];
END

let pat'  = Grammar.Entry.create gram "type/pattern expression"
EXTEND GLOBAL: pat pat';
  pat': [  [ p = pat; EOI -> p ] ];
END

let pat = Grammar.Entry.parse pat
and expr = Grammar.Entry.parse expr
and prog = Grammar.Entry.parse prog
and top_phrases = Grammar.Entry.parse top_phrases

let rec sync s =
  match Stream.next s with
    | ';' ->  
        (match Stream.next s with
           | ';' -> ()
           | _ -> sync s)
    | _ -> sync s
1	abate	4	open Location
2			open Ast
3	abate	225	open Ident
4	abate	4
5	abate	161	(*
6	abate	151	let () = Grammar.error_verbose := true
7	abate	161	*)
8	abate	81
9			let gram = Grammar.gcreate (Wlexer.lexer Wlexer.token Wlexer.latin1_engine)
10
11	abate	421	let true_atom = Atoms.mk_ascii "true"
12			let false_atom = Atoms.mk_ascii "false"
13			let true_type = Types.atom (Atoms.atom true_atom)
14			let false_type = Types.atom (Atoms.atom false_atom)
15	abate	81
16	abate	374	let parse_ident = Encodings.Utf8.mk_latin1
17
18	abate	375	let id_dummy = ident (U.mk "$$$")
19			let atom s = Atoms.mk (parse_ident s)
20	abate	374	let label s = LabelPool.mk (parse_ident s)
21	abate	375	let ident s = ident (parse_ident s)
22	abate	374
23	abate	38	let prog = Grammar.Entry.create gram "prog"
24	abate	431	let top_phrases = Grammar.Entry.create gram "toplevel phrases"
25	abate	38	let expr = Grammar.Entry.create gram "expression"
26			let pat = Grammar.Entry.create gram "type/pattern expression"
27			let regexp = Grammar.Entry.create gram "type/pattern regexp"
28			let const = Grammar.Entry.create gram "scalar constant"
29
30	abate	316	let exp pos e = LocatedExpr (loc_of_pos pos,e)
31
32	abate	38	let rec multi_prod loc = function
33			\| [ x ] -> x
34			\| x :: l -> mk loc (Prod (x, multi_prod loc l))
35			\| [] -> assert false
36
37	abate	316	let rec tuple = function
38	abate	38	\| [ x ] -> x
39	abate	316	\| x :: l -> Pair (x, tuple l)
40	abate	38	\| [] -> assert false
41	abate	89
42			let tuple_queue =
43	abate	316	List.fold_right (fun x q -> Pair (x, q))
44	abate	89
45	abate	233
46	abate	249	let char = mknoloc (Internal (Types.char Chars.any))
47	abate	66	let string_regexp = Star (Elem char)
48	abate	38
49	abate	316	let cst_nil = Cst (Types.Atom Sequence.nil_atom)
50	abate	38
51	abate	66	let seq_of_string pos s =
52	abate	310	let s = Encodings.Utf8.mk s in
53	abate	66	let (pos,_) = pos in
54	abate	310	let rec aux pos i j =
55			if Encodings.Utf8.equal_index i j then []
56			else
57	abate	325	let (len,i) = Encodings.Utf8.next s i in
58	abate	310	let (c,i) = Encodings.Utf8.next s i in
59	abate	325	((pos,pos+len),c) :: (aux (pos + len) i j)
60	abate	310	in
61	abate	325	aux (pos+1) (Encodings.Utf8.start_index s) (Encodings.Utf8.end_index s)
62	abate	4
63	abate	326	let get_string s =
64			let s = Encodings.Utf8.mk s in
65			let b = Buffer.create 32 in
66			let rec aux i j =
67			if Encodings.Utf8.equal_index i j then ()
68			else
69			let (len,i) = Encodings.Utf8.next s i in
70			let (c,i) = Encodings.Utf8.next s i in
71			Encodings.Utf8.store b c;
72			aux i j
73			in
74			aux (Encodings.Utf8.start_index s) (Encodings.Utf8.end_index s);
75			Buffer.contents b
76
77	abate	81	exception Error of string
78	abate	249	let error (i,j) s = Location.raise_loc i j (Error s)
79	abate	18
80	abate	233	let make_record loc r =
81			LabelMap.from_list (fun _ _ -> error loc "Duplicated record field") r
82
83	abate	81	let parse_char loc s =
84	abate	310	let s = seq_of_string loc s in
85			match s with
86	abate	325	\| [ loc,c ] -> c
87	abate	310	\| _ -> error loc "Character litteral must have length 1"
88	abate	81
89	abate	325	let char_list loc s =
90			let s = seq_of_string loc s in
91	abate	316	List.map (fun (loc,c) -> exp loc (Cst (Types.Char (Chars.mk_int c)))) s
92	abate	18
93
94	abate	249	let include_stack = ref []
95
96	abate	448	let protect_exn f g =
97			try let x = f () in g (); x
98			with e -> g (); raise e
99
100	abate	38	EXTEND
101	abate	431	GLOBAL: top_phrases prog expr pat regexp const;
102	abate	4
103	abate	431	top_phrases: [
104	abate	446	[ l = LIST0 phrase; ";;" -> List.flatten l ]
105	abate	431	];
106
107	abate	10	prog: [
108	abate	431	[ l = LIST0 [ p = phrase ; OPT ";;" -> p ]; EOI -> List.flatten l ]
109	abate	10	];
110
111	abate	13	phrase: [
112	abate	431	[ (f,p,e) = let_binding ->
113			if f then [ mk loc (FunDecl e) ] else
114			[ mk loc (LetDecl (p,e)) ]
115			\| (_,p,e1) = let_binding; "in"; e2 = expr LEVEL "top"->
116	abate	316	[ mk loc (EvalStatement (exp loc (Match (e1,[p,e2])))) ]
117	abate	431	\| "type"; x = UIDENT; "="; t = pat -> [ mk loc (TypeDecl (x,t)) ]
118			\| "type"; x = LIDENT -> error loc "Type identifiers must be capitalized"
119			\| "debug"; d = debug_directive -> [ mk loc (Debug d) ]
120	abate	446	\| DIRECTIVE "#quit" -> [ mk loc (Directive `Quit) ]
121			\| DIRECTIVE "#env" -> [ mk loc (Directive `Env) ]
122	abate	431	\| "include"; s = STRING2 ->
123	abate	326	let s = get_string s in
124	abate	249	protect_op "File inclusion";
125			(* avoid looping; should issue an error ? *)
126			if List.mem s !include_stack then []
127			else (
128			include_stack := s :: !include_stack;
129			Location.push_source (`File s);
130	abate	448	protect_exn
131			(fun () ->
132			let chan = open_in s in
133			let input = Stream.of_channel chan in
134			let l = Grammar.Entry.parse prog input in
135			close_in chan;
136			l)
137			(fun () ->
138			Location.pop_source ();
139			include_stack := List.tl !include_stack)
140	abate	249	)
141	abate	66	] \|
142	abate	249	[ e = expr -> [ mk loc (EvalStatement e) ]
143	abate	43	]
144	abate	13	];
145
146	abate	43	debug_directive: [
147			[ LIDENT "filter"; t = pat; p = pat -> `Filter(t,p)
148	abate	75	\| LIDENT "accept"; p = pat -> `Accept p
149	abate	43	\| LIDENT "compile"; t = pat; p = LIST1 pat -> `Compile (t,p)
150	abate	407	\| LIDENT "sample"; t = pat -> `Sample t
151	abate	224	\| LIDENT "subtype"; t1 = pat; t2 = pat -> `Subtype (t1,t2)
152	abate	43	]
153			];
154
155	abate	332	keyword: [
156			[ a =
157			[ "map" \| "match" \| "with" \| "try" \| "xtransform"
158			\| "if" \| "then" \| "else"
159			\| "transform" \| "fun" \| "in"
160	abate	431	\| "let" \| "type" \| "debug" \| "include"
161	abate	332	]
162			-> a
163			]
164			];
165
166	abate	4	expr: [
167			"top" RIGHTA
168	abate	421	[ "match"; e = SELF; "with"; b = branches ->
169			exp loc (Match (e,b))
170	abate	64	\| "try"; e = SELF; "with"; b = branches ->
171	abate	425	exp loc (Try (e,b))
172	abate	421	\| "map"; e = SELF; "with"; b = branches ->
173			exp loc (Map (e,b))
174			\| "xtransform"; e = SELF; "with"; b = branches ->
175			exp loc (Xtrans (e,b))
176	abate	237	\| "if"; e = SELF; "then"; e1 = SELF; "else"; e2 = SELF ->
177	abate	421	let p1 = mk loc (Internal true_type)
178			and p2 = mk loc (Internal false_type) in
179	abate	316	exp loc (Match (e, [p1,e1; p2,e2]))
180	abate	17	\| "transform"; e = SELF; "with"; b = branches ->
181	abate	421	exp loc (Transform (e,b))
182	abate	48	\| "fun"; (f,a,b) = fun_decl ->
183	abate	316	exp loc (Abstraction { fun_name = f; fun_iface = a; fun_body = b })
184	abate	431	\| (_,p,e1) = let_binding; "in"; e2 = expr LEVEL "top"->
185	abate	316	exp loc (Match (e1,[p,e2]))
186	abate	54	\| e = expr; ":"; p = pat ->
187	abate	316	exp loc (Forget (e,p))
188	abate	4	]
189
190
191	abate	15	\|
192	abate	237	[ e1 = expr; op = ["=" \| "<=" \| "<<" \| ">>" \| ">=" ]; e2 = expr ->
193			let op = match op with
194			\| "<<" -> "<"
195			\| ">>" -> ">"
196			\| s -> s in
197	abate	316	exp loc (Op (op,[e1;e2]))
198	abate	237	]
199
200			\|
201	abate	242	[ e1 = expr; op = ["+" \| "-" \| "@" ]; e2 = expr ->
202	abate	316	exp loc (Op (op,[e1;e2]))
203	abate	339	\| e = expr; "\\"; l = [LIDENT \| UIDENT \| keyword ] ->
204	abate	374	exp loc (RemoveField (e, label l))
205	abate	51	]
206	abate	16	\|
207	abate	316	[ e1 = expr; op = ["*"]; e2 = expr -> exp loc (Op (op,[e1;e2]))
208	abate	151	\| e = expr; op = "/"; p = pat ->
209
210			let tag = mk loc (Internal (Types.atom (Atoms.any))) in
211			let att = mk loc (Internal Types.Record.any) in
212			let any = mk loc (Internal (Types.any)) in
213	abate	375	let re = Star(Alt(SeqCapture(id_dummy,Elem p), Elem any)) in
214	abate	151	let ct = mk loc (Regexp (re,any)) in
215			let p = mk loc (XmlT (tag, multi_prod loc [att;ct])) in
216	abate	375	let b = (p, Var id_dummy) in
217	abate	421	exp loc (Transform (e,[b]))
218	abate	51	]
219	abate	26	\|
220	abate	339	[ e = expr; "."; l = [LIDENT \| UIDENT \| keyword ] ->
221	abate	374	exp loc (Dot (e, label l))
222	abate	51	]
223	abate	26
224	abate	52	\|
225	abate	66	[ op = [ LIDENT "flatten"
226			\| LIDENT "load_xml"
227	abate	374	\| LIDENT "load_file" \| LIDENT "load_file_utf8"
228	abate	188	\| LIDENT "load_html"
229	abate	374	\| LIDENT "print_xml" \| LIDENT "print_xml_utf8"
230	abate	124	\| LIDENT "print"
231	abate	66	\| LIDENT "int_of"
232	abate	133	\| LIDENT "string_of"
233	abate	329	\| LIDENT "atom_of"
234	abate	421	\| LIDENT "raise"
235	abate	66	];
236	abate	316	e = expr -> exp loc (Op (op,[e]))
237	abate	374	\| op = [ LIDENT "dump_to_file" \| LIDENT "dump_to_file_utf8" ];
238	abate	316	e1 = expr LEVEL "no_appl"; e2 = expr -> exp loc (Op (op, [e1;e2]))
239			\| e1 = SELF; LIDENT "div"; e2 = expr -> exp loc (Op ("/", [e1;e2]))
240			\| e1 = SELF; LIDENT "mod"; e2 = expr -> exp loc (Op ("mod", [e1;e2]))
241			\| e1 = SELF; e2 = expr -> exp loc (Apply (e1,e2))
242	abate	52	]
243
244	abate	4	\| "no_appl"
245	abate	316	[ c = const -> exp loc (Cst c)
246			\| "("; l = LIST1 expr SEP ","; ")" -> exp loc (tuple l)
247	abate	18	\| "["; l = LIST0 seq_elem; e = OPT [ ";"; e = expr -> e ]; "]" ->
248			let e = match e with Some e -> e \| None -> cst_nil in
249	abate	321	let l = List.fold_right
250			(fun x q ->
251			match x with
252			\| `Elems l -> tuple_queue l q
253			\| `Explode x -> Op ("@",[x;q])
254			) l e
255			in
256			exp loc l
257	abate	332	\| "<"; t = [ "("; e = expr; ")" -> e
258			\| a = [ LIDENT \| UIDENT \| keyword ] ->
259	abate	375	exp loc (Cst (Types.Atom (atom a))) ];
260	abate	81	a = expr_attrib_spec; ">"; c = expr ->
261	abate	316	exp loc (Xml (t, Pair (a,c)))
262			\| "{"; r = [ expr_record_spec \| -> exp loc (RecordLitt LabelMap.empty) ]; "}" -> r
263	abate	81	\| s = STRING2 ->
264	abate	316	exp loc (tuple (char_list loc s @ [cst_nil]))
265	abate	375	\| a = LIDENT -> exp loc (Var (ident a))
266	abate	4	]
267
268			];
269	abate	18
270			seq_elem: [
271	abate	89	[ x = STRING1 -> `Elems (char_list loc x)
272			\| e = expr LEVEL "no_appl" -> `Elems [e]
273			\| "!"; e = expr LEVEL "no_appl" -> `Explode e
274	abate	18	]
275			];
276	abate	4
277			let_binding: [
278	abate	431	[ "let"; p = pat; "="; e = expr -> (false,p,e)
279			\| "let"; p = pat; ":"; t = pat; "="; e = expr -> (false,p, Forget (e,t))
280	abate	48	\| "let"; "fun"; (f,a,b) = fun_decl ->
281			let p = match f with
282			\| Some x -> mk loc (Capture x)
283			\| _ -> failwith "Function name mandatory in let fun declarations"
284			in
285			let abst = { fun_name = f; fun_iface = a; fun_body = b } in
286	abate	316	let e = exp loc (Abstraction abst) in
287	abate	431	(true,p,e)
288	abate	4	]
289			];
290
291	abate	48	fun_decl: [
292	abate	85	(* need an hack to do this, because both productions would
293			match [ OPT LIDENT; "("; pat ] .... *)
294	abate	375	[ f = OPT [ x = LIDENT -> ident x]; "("; p1 = pat LEVEL "no_arrow";
295	abate	85	res = [ "->"; p2 = pat;
296			a = [ ";"; a = LIST0 arrow SEP ";" -> a \| -> [] ];
297			")"; b = branches -> `Classic (p2,a,b)
298			\| ":"; targ1 = pat;
299			args = LIST0 [ ","; arg = pat; ":"; targ = pat -> (arg,targ) ];
300			")"; ":"; tres = pat ;
301			"="; body = expr ->
302			`Compact (targ1,args,tres,body)
303			] ->
304			match res with
305			\| `Classic (p2,a,b) -> f,(p1,p2)::a,b
306			\| `Compact (targ1,args,tres,body) ->
307			let args = (p1,targ1) :: args in
308	abate	249	let targ = multi_prod nopos (List.map snd args) in
309			let arg = multi_prod nopos (List.map fst args) in
310	abate	85	let b = [arg, body] in
311			let a = [targ,tres] in
312			(f,a,b)
313	abate	48	]
314			];
315
316	abate	85	arrow: [
317	abate	9	[ t1 = pat LEVEL "no_arrow"; "->"; t2 = pat -> (t1,t2)]
318	abate	4	];
319
320			branches: [
321	abate	81	[ OPT "\|"; l = LIST1 branch SEP "\|" -> l ]
322	abate	4	];
323
324			branch: [
325	abate	6	[ p = pat LEVEL "no_arrow"; "->"; e = expr -> (p,e) ]
326	abate	4	];
327
328
329			regexp: [
330	abate	236	[ x = regexp; "\|"; y = regexp ->
331			match (x,y) with
332			\| Elem x, Elem y -> Elem (mk loc (Or (x,y)))
333			\| _ -> Alt (x,y)
334			]
335	abate	4	\| [ x = regexp; y = regexp -> Seq (x,y) ]
336	abate	375	\| [ a = LIDENT; "::"; x = regexp -> SeqCapture (ident a,x) ]
337	abate	4	\| [ x = regexp; "*" -> Star x
338			\| x = regexp; "*?" -> WeakStar x
339			\| x = regexp; "+" -> Seq (x, Star x)
340			\| x = regexp; "+?" -> Seq (x, WeakStar x)
341	abate	71	\| x = regexp; "?" -> Alt (x, Epsilon)
342	abate	4	\| x = regexp; "??" -> Alt (Epsilon, x) ]
343			\| [ "("; x = regexp; ")" -> x
344	abate	225	\| "("; a = LIDENT; ":="; c = const; ")" ->
345	abate	375	Elem (mk loc (Constant ((ident a,c))))
346	abate	66	\| UIDENT "PCDATA" -> string_regexp
347	abate	81	\| i = STRING1; "--"; j = STRING1 ->
348	abate	310	let i = Chars.mk_int (parse_char loc i)
349			and j = Chars.mk_int (parse_char loc j) in
350	abate	66	Elem (mk loc (Internal (Types.char (Chars.char_class i j))))
351	abate	81	\| s = STRING1 ->
352			let s = seq_of_string loc s in
353	abate	18	List.fold_right
354	abate	66	(fun (loc,c) accu ->
355	abate	310	let c = Chars.mk_int c in
356	abate	18	let c = Chars.atom c in
357			Seq (Elem (mk loc (Internal (Types.char c))), accu))
358			s
359	abate	66	Epsilon
360	abate	4	\| e = pat LEVEL "simple" -> Elem e
361			]
362			];
363
364			pat: [
365	abate	332	[ x = pat; LIDENT "where";
366	abate	338	b = LIST1 [ a = UIDENT; "="; y = pat -> (a,y)
367			\| LIDENT -> error loc "Type/pattern identifiers must be capitalized"
368			] SEP "and"
369	abate	4	-> mk loc (Recurs (x,b)) ]
370			\| RIGHTA [ x = pat; "->"; y = pat -> mk loc (Arrow (x,y)) ]
371	abate	6	\| "no_arrow" [ x = pat; "\|"; y = pat -> mk loc (Or (x,y)) ]
372	abate	121	\| "simple" [ x = pat; "&"; y = pat -> mk loc (And (x,y))
373	abate	99	\| x = pat; "\\"; y = pat -> mk loc (Diff (x,y)) ]
374	abate	4	\|
375	abate	159	[ "{"; r = record_spec; "}" -> mk loc (Record (true,r))
376			\| "{\|"; r = record_spec; "\|}" -> mk loc (Record (false,r))
377	abate	4	\| LIDENT "_" -> mk loc (Internal Types.any)
378	abate	375	\| a = LIDENT -> mk loc (Capture (ident a))
379	abate	225	\| "("; a = LIDENT; ":="; c = const; ")" ->
380	abate	375	mk loc (Constant (ident a,c))
381	abate	4	\| a = UIDENT -> mk loc (PatVar a)
382			\| i = INT ; "--"; j = INT ->
383	abate	222	let i = Intervals.mk i
384			and j = Intervals.mk j in
385	abate	52	mk loc (Internal (Types.interval (Intervals.bounded i j)))
386			\| i = INT ->
387	abate	222	let i = Intervals.mk i in
388	abate	52	mk loc (Internal (Types.interval (Intervals.atom i)))
389	abate	81	\| "*"; "--"; j = INT ->
390	abate	222	let j = Intervals.mk j in
391	abate	52	mk loc (Internal (Types.interval (Intervals.left j)))
392	abate	81	\| i = INT; "--"; "*" ->
393	abate	222	let i = Intervals.mk i in
394	abate	52	mk loc (Internal (Types.interval (Intervals.right i)))
395	abate	19	\| i = char ->
396			mk loc (Internal (Types.char (Chars.char_class i i)))
397	abate	13	\| i = char ; "--"; j = char ->
398	abate	18	mk loc (Internal (Types.char (Chars.char_class i j)))
399	abate	4	\| c = const -> mk loc (Internal (Types.constant c))
400			\| "("; l = LIST1 pat SEP ","; ")" -> multi_prod loc l
401			\| "["; r = [ r = regexp -> r \| -> Epsilon ];
402			q = [ ";"; q = pat -> q
403	abate	249	\| -> mknoloc (Internal (Sequence.nil_type)) ];
404	abate	4	"]" -> mk loc (Regexp (r,q))
405	abate	332	\| "<"; t =
406			[ x = [ LIDENT \| UIDENT \| keyword ] ->
407	abate	375	let a = if x = "_" then Atoms.any else Atoms.atom (atom x) in
408	abate	332	mk loc (Internal (Types.atom a))
409			\| "("; t = pat; ")" -> t ];
410	abate	81	a = attrib_spec; ">"; c = pat ->
411	abate	110	mk loc (XmlT (t, multi_prod loc [a;c]))
412	abate	81	\| s = STRING2 ->
413			let s = seq_of_string loc s in
414	abate	63	let s = List.map
415	abate	66	(fun (loc,c) ->
416	abate	63	mk loc (Internal
417			(Types.char
418			(Chars.atom
419	abate	310	(Chars.mk_int c))))) s in
420	abate	63	let s = s @ [mk loc (Internal (Sequence.nil_type))] in
421			multi_prod loc s
422	abate	4	]
423
424			];
425
426			record_spec:
427	abate	339	[ [ r = LIST0 [ l = [LIDENT \| UIDENT \| keyword ]; "=";
428	abate	81	o = [ "?" -> true \| -> false];
429	abate	229	x = pat ->
430			let x = if o then mk loc (Optional x) else x in
431	abate	374	(label l, x)
432	abate	4	] SEP ";" ->
433	abate	233	make_record loc r
434	abate	4	] ];
435
436	abate	13	char:
437			[
438	abate	310	[ c = STRING1 -> Chars.mk_int (parse_char loc c) ]
439	abate	13	];
440
441
442	abate	4	const:
443			[
444	abate	222	[ i = INT -> Types.Integer (Intervals.mk i)
445	abate	375	\| "`"; a = [LIDENT \| UIDENT \| keyword ] -> Types.Atom (atom a)
446	abate	13	\| c = char -> Types.Char c ]
447	abate	4	];
448
449
450			attrib_spec:
451	abate	159	[ [ r = record_spec -> mk loc (Record (true,r))
452	abate	252	\| "("; t = pat; ")" -> t
453			\| "{"; r = record_spec; "}" -> mk loc (Record (true,r))
454			\| "{\|"; r = record_spec; "\|}" -> mk loc (Record (false,r))
455			] ];
456	abate	4
457			expr_record_spec:
458			[ [ r = LIST1
459	abate	339	[ l = [LIDENT \| UIDENT \| keyword ]; "="; x = expr ->
460	abate	374	(label l,x) ]
461	abate	4	SEP ";" ->
462	abate	316	exp loc (RecordLitt (make_record loc r))
463	abate	4	] ];
464
465			expr_attrib_spec:
466			[ [ r = expr_record_spec -> r ]
467			\| [ e = expr LEVEL "no_appl" -> e
468	abate	316	\| -> exp loc (RecordLitt (LabelMap.empty))
469	abate	4	]
470			];
471			END
472
473	abate	61	let pat' = Grammar.Entry.create gram "type/pattern expression"
474			EXTEND GLOBAL: pat pat';
475			pat': [ [ p = pat; EOI -> p ] ];
476			END
477
478	abate	10	let pat = Grammar.Entry.parse pat
479	abate	81	and expr = Grammar.Entry.parse expr
480			and prog = Grammar.Entry.parse prog
481	abate	431	and top_phrases = Grammar.Entry.parse top_phrases
482	abate	10
483	abate	431	let rec sync s =
484			match Stream.next s with
485			\| ';' ->
486			(match Stream.next s with
487			\| ';' -> ()
488			\| _ -> sync s)
489			\| _ -> sync s