X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fcic_notation%2FcicNotationLexer.ml;h=01ef6142c8de0c45603a341129804e98074ee78d;hb=ba2dfe6409e95bf9e558dc0d4be382b068671409;hp=6ff589384a707e7db30b878c8433e2b9791d7c35;hpb=879797d6505bc39489009d9ae1e2506022bde9e2;p=helm.git

diff --git a/helm/ocaml/cic_notation/cicNotationLexer.ml b/helm/ocaml/cic_notation/cicNotationLexer.ml
index 6ff589384..01ef6142c 100644
--- a/helm/ocaml/cic_notation/cicNotationLexer.ml
+++ b/helm/ocaml/cic_notation/cicNotationLexer.ml
@@ -23,9 +23,9 @@
  * http://helm.cs.unibo.it/
  *)
 
-exception Error of int * int * string
+open Printf
 
-exception Not_an_extended_ident
+exception Error of int * int * string
 
 let regexp number = xml_digit+
 
@@ -35,46 +35,114 @@ let regexp ident = xml_letter ident_cont* ident_decoration*
 
 let regexp tex_token = '\\' ident
 
+let regexp delim_begin = "\\["
+let regexp delim_end = "\\]"
+
 let regexp keyword = '"' ident '"'
+let regexp qkeyword = "'" ident "'"
 
 let regexp implicit = '?'
 let regexp meta = implicit number
 
+let regexp csymbol = '\'' ident
+
+let regexp begin_group = "@{" | "${"
+let regexp end_group = '}'
+let regexp wildcard = "$_"
+let regexp ast_ident = "@" ident
+let regexp ast_csymbol = "@" csymbol
+let regexp meta_ident = "$" ident
+let regexp meta_anonymous = "$_"
+let regexp qstring = '"' [^ '"']* '"'
+
+let level1_layouts = 
+  [ "sub"; "sup";
+    "below"; "above";
+    "over"; "atop"; "frac";
+    "sqrt"; "root"
+  ]
+
+let level1_keywords =
+  [ "hbox"; "hvbox"; "hovbox"; "vbox";
+    "break";
+    "list0"; "list1"; "sep";
+    "opt";
+    "term"; "ident"; "number"
+  ] @ level1_layouts
+
+let level2_meta_keywords =
+  [ "if"; "then"; "else";
+    "fold"; "left"; "right"; "rec";
+    "fail";
+    "default";
+    "anonymous"; "ident"; "number"; "term"; "fresh"
+  ]
+
+  (* (string, unit) Hashtbl.t, to exploit multiple bindings *)
+let level2_ast_keywords = Hashtbl.create 23
+let _ =
+  (* TODO ZACK: keyword list almost cut and paste from cicTextualLexer2.ml, to
+   * be reviewed *)
+  List.iter (fun k -> Hashtbl.add level2_ast_keywords k ())
+    [ "Prop"; "Type"; "Set"; "let"; "rec"; "corec"; "match"; "with"; "in";
+      "and"; "on" ]
+
+let add_level2_ast_keyword k =
+  prerr_endline ("Adding keyword " ^ k);
+  Hashtbl.add level2_ast_keywords k ()
+let remove_level2_ast_keyword k = Hashtbl.remove level2_ast_keywords k
+
+let regexp uri =
+  ("cic:/" | "theory:/")              (* schema *)
+  ident ('/' ident)*                  (* path *)
+  ('.' ident)+                        (* ext *)
+  ("#xpointer(" number ('/' number)+ ")")?  (* xpointer *)
+
 let error lexbuf msg =
-  raise (Error (Ulexing.lexeme_start lexbuf, Ulexing.lexeme_end lexbuf, msg))
+  let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+  raise (Error (begin_cnum, end_cnum, msg))
 let error_at_end lexbuf msg =
-  raise (Error (Ulexing.lexeme_end lexbuf, Ulexing.lexeme_end lexbuf, msg))
+  let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+  raise (Error (begin_cnum, end_cnum, msg))
 
-let return lexbuf token =
+let return_with_loc token begin_cnum end_cnum =
+  (* TODO handle line/column numbers *)
   let flocation_begin =
-    { Lexing.pos_fname = ""; Lexing.pos_lnum = -1; Lexing.pos_bol = -1;
-      Lexing.pos_cnum = Ulexing.lexeme_start lexbuf }
-  in
-  let flocation_end =
-    { flocation_begin with Lexing.pos_cnum = Ulexing.lexeme_end lexbuf }
+    { Lexing.pos_fname = "";
+      Lexing.pos_lnum = -1; Lexing.pos_bol = -1;
+      Lexing.pos_cnum = begin_cnum }
   in
+  let flocation_end = { flocation_begin with Lexing.pos_cnum = end_cnum } in
   (token, (flocation_begin, flocation_end))
 
+let return lexbuf token =
+  let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+    return_with_loc token begin_cnum end_cnum
+
+let return_lexeme lexbuf name = return lexbuf (name, Ulexing.utf8_lexeme lexbuf)
+
 let remove_quotes s = String.sub s 1 (String.length s - 2)
 
-let tok_func token stream =
-  let lexbuf = Ulexing.from_utf8_stream stream in
-  Token.make_stream_and_flocation
-    (fun () ->
-      try
-	token lexbuf
-      with
-      | Ulexing.Error -> error_at_end lexbuf "Unexpected character"
-      | Ulexing.InvalidCodepoint i -> error_at_end lexbuf "Invalid code point")
-
-let mk_lexer token = {
-  Token.tok_func = token;
-  Token.tok_using = (fun _ -> ());
-  Token.tok_removing = (fun _ -> ()); 
-  Token.tok_match = Token.default_match;
-  Token.tok_text = Token.lexer_text;
-  Token.tok_comm = None;
-}
+let mk_lexer token =
+  let tok_func stream =
+    let lexbuf = Ulexing.from_utf8_stream stream in
+    Token.make_stream_and_flocation
+      (fun () ->
+        try
+          token lexbuf
+        with
+        | Ulexing.Error -> error_at_end lexbuf "Unexpected character"
+        | Ulexing.InvalidCodepoint p ->
+            error_at_end lexbuf (sprintf "Invalid code point: %d" p))
+  in
+  {
+    Token.tok_func = tok_func;
+    Token.tok_using = (fun _ -> ());
+    Token.tok_removing = (fun _ -> ()); 
+    Token.tok_match = Token.default_match;
+    Token.tok_text = Token.lexer_text;
+    Token.tok_comm = None;
+  }
 
 let expand_macro lexbuf =
   let macro =
@@ -86,33 +154,97 @@ let expand_macro lexbuf =
 
 let keyword lexbuf = "KEYWORD", remove_quotes (Ulexing.utf8_lexeme lexbuf)
 
-(** {2 Level 1 lexer} *)
+let remove_quotes s = String.sub s 1 (String.length s - 2)
+let remove_left_quote s = String.sub s 1 (String.length s - 1)
+
+let rec level2_pattern_token_group counter buffer = lexer
+  | end_group -> 
+      if (counter > 0) then
+	Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+      snd (Ulexing.loc lexbuf)
+  | begin_group -> 
+      Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+      ignore (level2_pattern_token_group (counter + 1) buffer lexbuf) ;
+      level2_pattern_token_group counter buffer lexbuf
+  | _ -> 
+      Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+      level2_pattern_token_group counter buffer lexbuf
+
+let read_unparsed_group token_name lexbuf =
+  let buffer = Buffer.create 16 in
+  let begin_cnum, _ = Ulexing.loc lexbuf in
+  let end_cnum = level2_pattern_token_group 0 buffer lexbuf in
+    return_with_loc (token_name, Buffer.contents buffer) begin_cnum end_cnum
+
+let rec level2_meta_token = lexer
+  | xml_blank+ -> level2_meta_token lexbuf
+  | ident ->
+      let s = Ulexing.utf8_lexeme lexbuf in
+	begin
+	  if List.mem s level2_meta_keywords then
+	    return lexbuf ("", s)
+	  else
+	    return lexbuf ("IDENT", s)
+	end
+  | "@{" -> read_unparsed_group "UNPARSED_AST" lexbuf
+  | ast_ident ->
+      return lexbuf ("UNPARSED_AST",
+        remove_left_quote (Ulexing.utf8_lexeme lexbuf))
+  | ast_csymbol ->
+      return lexbuf ("UNPARSED_AST",
+        remove_left_quote (Ulexing.utf8_lexeme lexbuf))
+  | eof -> return lexbuf ("EOI", "")
 
-let rec level1_token = lexer
-  | xml_blank+ -> level1_token lexbuf
-  | ident -> return lexbuf ("IDENT", Ulexing.utf8_lexeme lexbuf)
+let rec level2_ast_token = lexer
+  | xml_blank+ -> level2_ast_token lexbuf
+  | meta -> return lexbuf ("META", Ulexing.utf8_lexeme lexbuf)
+  | implicit -> return lexbuf ("IMPLICIT", Ulexing.utf8_lexeme lexbuf)
+  | ident ->
+      let lexeme = Ulexing.utf8_lexeme lexbuf in
+      if Hashtbl.mem level2_ast_keywords lexeme then
+        return lexbuf ("", lexeme)
+      else
+        return lexbuf ("IDENT", lexeme)
   | number -> return lexbuf ("NUMBER", Ulexing.utf8_lexeme lexbuf)
   | keyword -> return lexbuf (keyword lexbuf)
   | tex_token -> return lexbuf (expand_macro lexbuf)
-  | eof -> return lexbuf ("EOI", "")
+  | uri -> return lexbuf ("URI", Ulexing.utf8_lexeme lexbuf)
+  | qstring ->
+      return lexbuf ("QSTRING", remove_quotes (Ulexing.utf8_lexeme lexbuf))
+  | csymbol -> return lexbuf ("CSYMBOL", Ulexing.utf8_lexeme lexbuf)
+  | "${" -> read_unparsed_group "UNPARSED_META" lexbuf
+  | "@{" -> read_unparsed_group "UNPARSED_AST" lexbuf
+  | '(' -> return lexbuf ("LPAREN", "")
+  | ')' -> return lexbuf ("RPAREN", "")
+  | meta_ident ->
+      return lexbuf ("UNPARSED_META",
+        remove_left_quote (Ulexing.utf8_lexeme lexbuf))
+  | meta_anonymous -> return lexbuf ("UNPARSED_META", "anonymous")
   | _ -> return lexbuf ("SYMBOL", Ulexing.utf8_lexeme lexbuf)
+  | eof -> return lexbuf ("EOI", "")
 
-let level1_tok_func stream = tok_func level1_token stream
-let level1_lexer = mk_lexer level1_tok_func
-
-(** {2 Level 2 lexer} *)
-
-let rec level2_token = lexer
-  | xml_blank+ -> level1_token lexbuf
-  | meta -> return lexbuf ("META", Ulexing.utf8_lexeme lexbuf)
-  | implicit -> return lexbuf ("IMPLICIT", Ulexing.utf8_lexeme lexbuf)
-  | ident -> return lexbuf ("IDENT", Ulexing.utf8_lexeme lexbuf)
+let rec level1_pattern_token = lexer
+  | xml_blank+ -> level1_pattern_token lexbuf
   | number -> return lexbuf ("NUMBER", Ulexing.utf8_lexeme lexbuf)
-  | keyword -> return lexbuf (keyword lexbuf)
+  | ident ->
+      let s = Ulexing.utf8_lexeme lexbuf in
+	begin
+	  if List.mem s level1_keywords then
+	    return lexbuf ("", s)
+	  else
+	    return lexbuf ("IDENT", s)
+	end
   | tex_token -> return lexbuf (expand_macro lexbuf)
+  | qkeyword ->
+      return lexbuf ("QKEYWORD", remove_quotes (Ulexing.utf8_lexeme lexbuf))
+  | '(' -> return lexbuf ("LPAREN", "")
+  | ')' -> return lexbuf ("RPAREN", "")
   | eof -> return lexbuf ("EOI", "")
   | _ -> return lexbuf ("SYMBOL", Ulexing.utf8_lexeme lexbuf)
 
-let level2_tok_func stream = tok_func level2_token stream
-let level2_lexer = mk_lexer level2_tok_func
+(* API implementation *)
+
+let level1_pattern_lexer = mk_lexer level1_pattern_token
+let level2_ast_lexer = mk_lexer level2_ast_token
+let level2_meta_lexer = mk_lexer level2_meta_token