git.roojs.org Git - gnome.introspection-doc-generator/blob - JSDOC/ScopeParser.js

   1 //<Script type="text/javascript">
   2
   3 Scope = imports['JSDOC/Scope.js'].Scope;
   4
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 */
  10
  11 ScopeParser = function(ts) {
  12     this.ts = ts; // {TokenStream}
  13     this.warnings = [];
  14     this.scopes = [];
  15     this.indexedScopes = {};
  16     this.timer = new Date() * 1;
  17     this.debug = false;
  18 }
  19
  20 // list of keywords that should not be used in object literals.
  21 ScopeParser.idents = [
  22         "break",
  23         "case",
  24         "continue",
  25         "default",
  26         "delete",
  27         "do",
  28         "else",
  29         "export",
  30         "false",
  31         "for",
  32         "function",
  33         "if",
  34         "import",
  35         "in",
  36         "new",
  37         "null",
  38         "return",
  39         "switch",
  40         "this",
  41         "true",
  42         "typeof",
  43         "var",
  44         "void",
  45         "while",
  46         "with",
  47
  48         "catch",
  49         "class",
  50         "const",
  51         "debugger",
  52         "enum",
  53         "extends",
  54         "finally",
  55         "super",
  56         "throw",
  57         "try",
  58
  59         "abstract",
  60         "boolean",
  61         "byte",
  62         "char",
  63         "double",
  64         "final",
  65         "float",
  66         "goto",
  67         "implements",
  68         "instanceof",
  69         "int",
  70         "interface",
  71         "long",
  72         "native",
  73         "package",
  74         "private",
  75         "protected",
  76         "public",
  77         "short",
  78         "static",
  79         "synchronized",
  80         "throws",
  81         "transient",
  82                 "include",
  83                 "undefined"
  84 ];
  85
  86
  87 ScopeParser.prototype = {
  88     timer: 0,
  89     timerPrint: function (str) {
  90         var ntime = new Date() * 1;
  91         var tdif =  ntime -this.timer;
  92         this.timer = ntime;
  93         var pref = '';
  94         if (tdif > 100) { //slower ones..
  95             pref = '***';
  96         }
  97         println(pref+'['+tdif+']'+str);
  98
  99     },
 100     warn: function(s) {
 101         !this.debug || print('****************' + s);
 102         this.warnings.push(s);
 103         //println("WARNING:" + htmlescape(s) + "<BR>");
 104     },
 105     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 106     warnings : false,
 107     ts : false,
 108     scopes : false,
 109     global : false,
 110     mode : "", //"BUILDING_SYMBOL_TREE",
 111     braceNesting : 0,
 112     indexedScopes : false,
 113     munge: true,
 114
 115
 116
 117
 118
 119     buildSymbolTree : function()
 120     {
 121         //println("<PRE>");
 122
 123         this.ts.rewind();
 124         this.braceNesting = 0;
 125         this.scopes = [];
 126
 127
 128
 129
 130         this.globalScope = new  Scope(-1, false, -1, '');
 131         indexedScopes = { 0 : this.globalScope };
 132
 133         this.mode = 'BUILDING_SYMBOL_TREE';
 134         this.parseScope(this.globalScope);
 135     },
 136     mungeSymboltree : function()
 137     {
 138
 139         if (!this.munge) {
 140             return;
 141         }
 142
 143         // One problem with obfuscation resides in the use of undeclared
 144         // and un-namespaced global symbols that are 3 characters or less
 145         // in length. Here is an example:
 146         //
 147         //     var declaredGlobalVar;
 148         //
 149         //     function declaredGlobalFn() {
 150         //         var localvar;
 151         //         localvar = abc; // abc is an undeclared global symbol
 152         //     }
 153         //
 154         // In the example above, there is a slim chance that localvar may be
 155         // munged to 'abc', conflicting with the undeclared global symbol
 156         // abc, creating a potential bug. The following code detects such
 157         // global symbols. This must be done AFTER the entire file has been
 158         // parsed, and BEFORE munging the symbol tree. Note that declaring
 159         // extra symbols in the global scope won't hurt.
 160         //
 161         // Note: Since we go through all the tokens to do this, we also use
 162         // the opportunity to count how many times each identifier is used.
 163
 164         this.ts.rewind();
 165         this.braceNesting = 0;
 166         this.scopes= [];
 167         this.mode = 'PASS2_SYMBOL_TREE';
 168
 169         //println("MUNGING?");
 170
 171         this.parseScope(this.globalScope);
 172         this.globalScope.munge();
 173     },
 174
 175
 176     log : function(str)
 177     {
 178           //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 179     },
 180     logR : function(str)
 181     {
 182             //println("<B>LOG:</B>" + str + "<BR/>");
 183     },
 184
 185
 186
 187
 188
 189
 190     parseScope : function(scope) // parse a token stream..
 191     {
 192         //this.timerPrint("parseScope EnterScope");
 193         print(">>> ENTER SCOPE");
 194         var symbol;
 195         var token;
 196
 197         var identifier;
 198
 199         var expressionBraceNesting = this.braceNesting;
 200         var bracketNesting = 0;
 201         var parensNesting = 0;
 202
 203         var isObjectLitAr = [ false ];
 204         var isInObjectLitAr;
 205         this.scopes.push(scope);
 206         token = this.ts.lookTok(1);
 207         while (token) {
 208           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 209
 210             !this.debug|| print(token.type + '.' + token.name+ ":" + token.data);
 211             switch(token.type + '.' + token.name) {
 212                 case "KEYW.VAR":
 213                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 214
 215                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 216                     while (true) {
 217                         token = this.ts.nextTok();
 218                         !this.debug|| print( token.toString());
 219
 220                         if (!token) { // can return false at EOF!
 221                             break;
 222                         }
 223                         if (token.name == "VAR") { // kludge..
 224                             continue;
 225                         }
 226                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 227                         if (token.type !="NAME") {
 228                             print(token.toString());
 229                             print( "var without ident");
 230                             Seed.quit()
 231                         }
 232
 233
 234                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 235                             identifier = scope.getIdentifier(token.data) ;
 236
 237                             if (identifier == false) {
 238                                 scope.declareIdentifier(token.data, token);
 239                             } else {
 240                                 token.identifier = identifier;
 241                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 242                             }
 243                         }
 244
 245                         token = this.ts.nextTok();
 246                         !this.debug|| print(token.toString());
 247                         /*
 248                         assert token.getType() == Token.SEMI ||
 249                                 token.getType() == Token.ASSIGN ||
 250                                 token.getType() == Token.COMMA ||
 251                                 token.getType() == Token.IN;
 252                         */
 253                         if (token.name == "IN") {
 254                             break;
 255                         } else {
 256                             this.parseExpression();
 257                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 258
 259                             token = this.ts.lookTok(1);
 260                             !this.debug|| print("AFTER EXP: " + token.toString());
 261                             if (token.data == ';') {
 262                                 break;
 263                             }
 264                         }
 265                     }
 266                     break;
 267                 case "KEYW.FUNCTION":
 268                     //println("<i>"+token.data+"</i>");
 269                     this.parseFunctionDeclaration();
 270                     break;
 271
 272                 case "KEYW.LEFT_CURLY": // {
 273                     //println("<i>"+token.data+"</i>");
 274                     isObjectLitAr.push(false);
 275                     print(">>>>>> OBJLIT PUSH(false)");
 276                     this.braceNesting++;
 277                     break;
 278
 279                 case "KEYW.RIGHT_CURLY": // }
 280                     //println("<i>"+token.data+"</i>");
 281                     this.braceNesting--;
 282                     isObjectLitAr.pop();
 283                     print(">>>>>> OBJLIT POP(false)");
 284                         //assert braceNesting >= scope.getBraceNesting();
 285                     if (this.braceNesting == scope.braceN) {
 286                         var ls = this.scopes.pop();
 287                         ls.getUsedSymbols();
 288                         print("<<<<<<<EXIT SCOPE");
 289                         return;
 290                     }
 291                     break;
 292
 293                 case "KEYW.WITH":
 294                     //println("<i>"+token.data+"</i>");
 295                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 296                         // Inside a 'with' block, it is impossible to figure out
 297                         // statically whether a symbol is a local variable or an
 298                         // object member. As a consequence, the only thing we can
 299                         // do is turn the obfuscation off for the highest scope
 300                         // containing the 'with' block.
 301                         this.protectScopeFromObfuscation(scope);
 302                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 303                     }
 304                     break;
 305
 306                 case "KEYW.CATCH":
 307                     //println("<i>"+token.data+"</i>");
 308                     this.parseCatch();
 309                     break;
 310                 /*
 311                 case Token.SPECIALCOMMENT:
 312                         if (mode == BUILDING_SYMBOL_TREE) {
 313                             protectScopeFromObfuscation(scope);
 314                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 315                         }
 316                         break;
 317                 */
 318
 319                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 320                 case "STRN.SINGLE_QUOTE":
 321                     //println("<i>"+token.data+"</i>");
 322                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 323                         // then we are in an object lit.. -> we need to flag the brace as such...
 324                         isObjectLitAr.pop();
 325                         isObjectLitAr.push(true);
 326                         print(">>>>>> OBJLIT PUSH(true)");
 327                     }
 328                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 329
 330                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 331                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 332                         // see if we can replace..
 333                         // remove the quotes..
 334                         // should do a bit more checking!!!! (what about wierd char's in the string..
 335                         var str = token.data.substring(1,token.data.length-1);
 336                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 337                             token.outData = str;
 338                         }
 339
 340
 341
 342                     }
 343
 344
 345
 346                     break;
 347
 348                 case "NAME.NAME":
 349
 350                     //print("DEAL WITH NAME:");
 351                     // got identifier..
 352
 353                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 354                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 355                         isObjectLitAr.pop();
 356                         isObjectLitAr.push(true);
 357                         print(">>>>>> OBJLIT PUSH(true)");
 358                         //println("<i>"+token.data+"</i>");
 359                         break;
 360                     }
 361                    // print("DEAL WITH obj lit:");
 362                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 363
 364                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 365                         // skip, it's an object lit key..
 366                         //println("<i>"+token.data+"</i>");
 367                         break;
 368                     }
 369
 370
 371                     // skip anyting with "." before it..!!
 372
 373                     if (this.ts.lookTok(-1).data == ".") {
 374                         // skip, it's an object prop.
 375                         //println("<i>"+token.data+"</i>");
 376                         break;
 377                     }
 378                     symbol = token.data;
 379                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 380
 381                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 382
 383                         //print ("MUNGE?" + symbol);
 384
 385                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 386
 387                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 388                         identifier = this.getIdentifier(symbol, scope);
 389
 390                         if (identifier == false) {
 391 // BUG!find out where builtin is defined...
 392                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 393                                 // Here, we found an undeclared and un-namespaced symbol that is
 394                                 // 3 characters or less in length. Declare it in the global scope.
 395                                 // We don't need to declare longer symbols since they won't cause
 396                                 // any conflict with other munged symbols.
 397                                 this.globalScope.declareIdentifier(symbol, token);
 398                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 399                             }
 400
 401                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 402                         } else {
 403                             token.identifier = identifier;
 404                             identifier.refcount++;
 405                         }
 406                     }
 407
 408                     break;
 409                     //println("<B>SID</B>");
 410                 default:
 411                     if (token.type != 'KEYW') {
 412                         break;
 413                     }
 414                    // print("Check eval:");
 415
 416                     symbol = token.data;
 417
 418                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 419
 420                         if (symbol == "eval") {
 421                             // look back one and see if we can find a comment!!!
 422                             if (this.ts.look(-1).type == "COMM") {
 423                                 // look for eval:var:noreplace\n
 424                                 var _t = this;
 425                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 426
 427                                     var hi = _t.getIdentifier(a, scope);
 428                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 429                                     if (hi) {
 430                                      //   println("PROTECT "+a+" from munge");
 431                                         hi.toMunge = false;
 432                                     }
 433
 434                                 });
 435
 436
 437                             } else {
 438
 439
 440                                 this.protectScopeFromObfuscation(scope);
 441                                 this.warn("Using 'eval' is not recommended. (use  eval:var:noreplace in comments to optimize) " + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 442                             }
 443
 444                         }
 445
 446                     }
 447                     break;
 448
 449
 450             } // end switch
 451
 452
 453             //this.timerPrint("parseScope TOK : " + token.toString());
 454             token = this.ts.nextTok();
 455             //if (this.ts.nextT()) break;
 456
 457         }
 458     },
 459
 460
 461     parseExpression : function() {
 462
 463         // Parse the expression until we encounter a comma or a semi-colon
 464         // in the same brace nesting, bracket nesting and paren nesting.
 465         // Parse functions if any...
 466         //println("<i>EXP</i><BR/>");
 467         !this.debug || print("PARSE EXPR");
 468         var symbol;
 469         var token;
 470         var currentScope;
 471         var identifier;
 472
 473         var expressionBraceNesting = this.braceNesting;
 474         var bracketNesting = 0;
 475         var parensNesting = 0;
 476         var isInObjectLitAr;
 477         var isObjectLitAr = [ false ];
 478         while (token = this.ts.lookTok()) {
 479
 480
 481
 482             currentScope = this.scopes[this.scopes.length-1];
 483
 484             //println("<i>"+token.data+"</i>");
 485             !this.debug|| print ("EXP" + token.toString());
 486             switch (token.type) {
 487                 case 'PUNC':
 488                     switch(token.data) {
 489
 490                         case ';':
 491                         case ',':
 492                             if (this.braceNesting == expressionBraceNesting &&
 493                                     bracketNesting == 0 &&
 494                                     parensNesting == 0) {
 495
 496                                 return;
 497                             }
 498                             break;
 499
 500
 501
 502                         case '{': //Token.LC:
 503                             isObjectLitAr.push(false);
 504                             print(">>>>> OBJ PUSH(false)");
 505                             this.braceNesting++;
 506                             break;
 507
 508                         case '}': //Token.RC:
 509                             this.braceNesting--;
 510                             isObjectLitAr.pop();
 511                             print(">>>>> OBJ POP");
 512                            // assert braceNesting >= expressionBraceNesting;
 513                             break;
 514
 515                         case '[': //Token.LB:
 516                             bracketNesting++;
 517                             break;
 518
 519                         case ']': //Token.RB:
 520                             bracketNesting--;
 521                             break;
 522
 523                         case '(': //Token.LP:
 524                             parensNesting++;
 525                             break;
 526
 527                         case ')': //Token.RP:
 528                             parensNesting--;
 529                             break;
 530                     }
 531                     break;
 532
 533                 case 'STRN': // used for object lit detection..
 534                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 535                         // then we are in an object lit.. -> we need to flag the brace as such...
 536                         isObjectLitAr.pop();
 537                         isObjectLitAr.push(true);
 538                         print(">>>>> OBJ PUSH(true)");
 539                     }
 540
 541
 542
 543                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 544                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 545                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 546                         // see if we can replace..
 547                         // remove the quotes..
 548                         var str = token.data.substring(1,token.data.length-1);
 549                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 550                             token.outData = str;
 551                         }
 552
 553
 554
 555                     }
 556
 557                     break;
 558
 559
 560
 561                 case 'NAME':
 562
 563                     symbol = token.data;
 564                     if (this.ts.lookTok(-1).data == "{"  && this.ts.lookTok(1).data == ":") {
 565                         // then we are in an object lit.. -> we need to flag the brace as such...
 566                         isObjectLitAr.pop();
 567                         isObjectLitAr.push(true);
 568                          print(">>>>> OBJ PUSH(true)");
 569                         break;
 570                     }
 571                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 572                     if (isInObjectLitAr && this.ts.lookTok(-1).data == "," && this.ts.lookTok(1).data == ":") {
 573                         break;
 574                     }
 575
 576                     if (this.ts.lookTok(-1).data == ".") {
 577                         //skip '.'
 578                         break;
 579                     }
 580
 581                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 582
 583                         identifier = this.getIdentifier(symbol, currentScope);
 584                         //println("<B>??</B>");
 585                         if (identifier == false) {
 586
 587                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 588                                 // Here, we found an undeclared and un-namespaced symbol that is
 589                                 // 3 characters or less in length. Declare it in the global scope.
 590                                 // We don't need to declare longer symbols since they won't cause
 591                                 // any conflict with other munged symbols.
 592                                 this.globalScope.declareIdentifier(symbol, token);
 593                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 594                             } else {
 595                                 //println("undeclared")
 596                             }
 597
 598
 599                         } else {
 600                             //println("<B>++</B>");
 601                             token.identifier = identifier;
 602                             identifier.refcount++;
 603                         }
 604
 605                     }
 606                     break;
 607
 608
 609
 610
 611                     //println("<B>EID</B>");
 612                  case 'KEYW':
 613
 614                     if (token.name == "FUNCTION") {
 615
 616                         this.parseFunctionDeclaration();
 617                         break;
 618                     }
 619
 620
 621
 622                     symbol = token.data;
 623                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 624
 625                         if (symbol == "eval") {
 626                             if (this.ts.look(-1).type == 'COMM') {
 627                                 // look for eval:var:noreplace\n
 628                                 var _t = this;
 629                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 630                                     var hi = _t.getIdentifier(a, currentScope);
 631                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 632                                     if (hi) {
 633                                       //  println("PROTECT "+a+" from munge");
 634                                         hi.toMunge = false;
 635                                     }
 636
 637
 638                                 });
 639
 640                             } else {
 641                                 this.protectScopeFromObfuscation(currentScope);
 642                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 643                             }
 644
 645
 646                         }
 647                         break;
 648                     }
 649
 650             }
 651             if (!this.ts.nextTok()) break;
 652         }
 653     },
 654
 655
 656     parseCatch : function() {
 657
 658         var symbol;
 659         var token;
 660         var currentScope;
 661         var identifier;
 662
 663         //token = getToken(-1);
 664         //assert token.getType() == Token.CATCH;
 665         token = this.ts.nextTok();
 666         //assert token.getType() == Token.LP; (
 667         token = this.ts.nextTok();
 668         //assert token.getType() == Token.NAME;
 669
 670         symbol = token.data;
 671         currentScope = this.scopes[this.scopes.length-1];
 672
 673         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 674             // We must declare the exception identifier in the containing function
 675             // scope to avoid errors related to the obfuscation process. No need to
 676             // display a warning if the symbol was already declared here...
 677             currentScope.declareIdentifier(symbol, token);
 678         } else {
 679             //?? why inc the refcount?? - that should be set when building the tree???
 680             identifier = this.getIdentifier(symbol, currentScope);
 681             identifier.refcount++;
 682         }
 683
 684         token = this.ts.nextTok();
 685         //assert token.getType() == Token.RP; // )
 686     },
 687
 688     parseFunctionDeclaration : function()
 689     {
 690        // print("PARSE FUNCTION");
 691         var symbol;
 692         var token;
 693         var currentScope  = false;
 694         var fnScope = false;
 695         var identifier;
 696         //this.logR("<B>PARSING FUNCTION</B>");
 697         currentScope = this.scopes[this.scopes.length-1];
 698
 699         token = this.ts.nextTok();
 700         if (token.type == "NAME") {
 701             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 702                 // Get the name of the function and declare it in the current scope.
 703                 symbol = token.data;
 704                 if (currentScope.getIdentifier(symbol) != false) {
 705                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 706                 }
 707                 currentScope.declareIdentifier(symbol,token);
 708             }
 709             token =  this.ts.nextTok();
 710         }
 711
 712         //assert token.getType() == Token.LP;
 713         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 714             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 715
 716             //println("STORING SCOPE" + this.ts.cursor);
 717
 718             this.indexedScopes[this.ts.cursor] = fnScope;
 719
 720         } else {
 721             //println("FETCHING SCOPE" + this.ts.cursor);
 722             fnScope = this.indexedScopes[this.ts.cursor];
 723         }
 724
 725         // Parse function arguments.
 726         var argpos = 0;
 727         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 728             token = this.ts.nextTok();
 729            // print ("FUNC ARGS: " + token.toString())
 730             //assert token.getType() == Token.NAME ||
 731             //        token.getType() == Token.COMMA;
 732             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 733                 symbol = token.data;
 734                 identifier = fnScope.declareIdentifier(symbol,token);
 735                 if (symbol == "$super" && argpos == 0) {
 736                     // Exception for Prototype 1.6...
 737                     identifier.preventMunging();
 738                 }
 739                 argpos++;
 740             }
 741         }
 742
 743         token = this.ts.nextTok();
 744         // assert token.getType() == Token.LC;
 745         this.braceNesting++;
 746
 747         token = this.ts.nextTok();
 748         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 749             /*
 750
 751             NOT SUPPORTED YET!?!!?!
 752
 753             // This is a hint. Hints are empty statements that look like
 754             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 755             // to prevent specific symbols from getting obfuscated (some heretic
 756             // implementations, such as Prototype 1.6, require specific variable
 757             // names, such as $super for example, in order to work appropriately.
 758             // Note: right now, only "nomunge" is supported in the right hand side
 759             // of a hint. However, in the future, the right hand side may contain
 760             // other values.
 761             consumeToken();
 762             String hints = token.getValue();
 763             // Remove the leading and trailing quotes...
 764             hints = hints.substring(1, hints.length() - 1).trim();
 765             StringTokenizer st1 = new StringTokenizer(hints, ",");
 766             while (st1.hasMoreTokens()) {
 767                 String hint = st1.nextToken();
 768                 int idx = hint.indexOf(':');
 769                 if (idx <= 0 || idx >= hint.length() - 1) {
 770                     if (mode == BUILDING_SYMBOL_TREE) {
 771                         // No need to report the error twice, hence the test...
 772                         this.warn("Invalid hint syntax: " + hint, true);
 773                     }
 774                     break;
 775                 }
 776                 String variableName = hint.substring(0, idx).trim();
 777                 String variableType = hint.substring(idx + 1).trim();
 778                 if (mode == BUILDING_SYMBOL_TREE) {
 779                     fnScope.addHint(variableName, variableType);
 780                 } else if (mode == CHECKING_SYMBOL_TREE) {
 781                     identifier = fnScope.getIdentifier(variableName);
 782                     if (identifier != null) {
 783                         if (variableType.equals("nomunge")) {
 784                             identifier.preventMunging();
 785                         } else {
 786                             this.warn("Unsupported hint value: " + hint, true);
 787                         }
 788                     } else {
 789                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 790                     }
 791                 }
 792             }
 793             */
 794         }
 795
 796         this.parseScope(fnScope);
 797         // now pop it off the stack!!!
 798
 799
 800
 801     },
 802
 803     protectScopeFromObfuscation : function(scope) {
 804             //assert scope != null;
 805
 806         if (scope == this.globalScope) {
 807             // The global scope does not get obfuscated,
 808             // so we don't need to worry about it...
 809             return;
 810         }
 811
 812         // Find the highest local scope containing the specified scope.
 813         while (scope && scope.parent != this.globalScope) {
 814             scope = scope.parent;
 815         }
 816
 817         //assert scope.getParentScope() == globalScope;
 818         scope.preventMunging();
 819     },
 820
 821     getIdentifier: function(symbol, scope) {
 822         var identifier;
 823         while (scope != false) {
 824             identifier = scope.getIdentifier(symbol);
 825             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 826             if (identifier) {
 827                 return identifier;
 828             }
 829             scope = scope.parent;
 830         }
 831         return false;
 832     }
 833 };