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         //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         //print("---------------END PASS 1 ---------------- ");
 137
 138     },
 139     mungeSymboltree : function()
 140     {
 141
 142         if (!this.munge) {
 143             return;
 144         }
 145
 146         // One problem with obfuscation resides in the use of undeclared
 147         // and un-namespaced global symbols that are 3 characters or less
 148         // in length. Here is an example:
 149         //
 150         //     var declaredGlobalVar;
 151         //
 152         //     function declaredGlobalFn() {
 153         //         var localvar;
 154         //         localvar = abc; // abc is an undeclared global symbol
 155         //     }
 156         //
 157         // In the example above, there is a slim chance that localvar may be
 158         // munged to 'abc', conflicting with the undeclared global symbol
 159         // abc, creating a potential bug. The following code detects such
 160         // global symbols. This must be done AFTER the entire file has been
 161         // parsed, and BEFORE munging the symbol tree. Note that declaring
 162         // extra symbols in the global scope won't hurt.
 163         //
 164         // Note: Since we go through all the tokens to do this, we also use
 165         // the opportunity to count how many times each identifier is used.
 166
 167         this.ts.rewind();
 168         this.braceNesting = 0;
 169         this.scopes= [];
 170         this.mode = 'PASS2_SYMBOL_TREE';
 171
 172         //println("MUNGING?");
 173
 174         this.parseScope(this.globalScope);
 175         this.globalScope.munge();
 176     },
 177
 178
 179     log : function(str)
 180     {
 181         print ("                    ".substring(0, this.braceNesting*2) + str);
 182
 183         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 184     },
 185     logR : function(str)
 186     {
 187             //println("<B>LOG:</B>" + str + "<BR/>");
 188     },
 189
 190
 191
 192
 193
 194
 195     parseScope : function(scope) // parse a token stream..
 196     {
 197         //this.timerPrint("parseScope EnterScope");
 198         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 199         var symbol;
 200         var token;
 201
 202         var identifier;
 203
 204         var expressionBraceNesting = this.braceNesting;
 205
 206         var parensNesting = 0;
 207
 208         var isObjectLitAr = [ false ];
 209         var isInObjectLitAr;
 210         this.scopes.push(scope);
 211         token = this.ts.lookTok(1);
 212         while (token) {
 213           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 214
 215             //this.log(token.data);
 216             if (token.type == 'NAME') {
 217             //    print('*' + token.data);
 218             }
 219             switch(token.type + '.' + token.name) {
 220                 case "KEYW.VAR":
 221                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 222
 223                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 224                     while (true) {
 225                         token = this.ts.nextTok();
 226                         !this.debug|| print( token.toString());
 227
 228                         if (!token) { // can return false at EOF!
 229                             break;
 230                         }
 231                         if (token.name == "VAR" || token.data == ',') { // kludge..
 232                             continue;
 233                         }
 234                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 235                         if (token.type !="NAME") {
 236                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 237                                 print(this.ts.tokens[i].toString());
 238                             }
 239
 240                             print( "var without ident");
 241                             Seed.quit()
 242                         }
 243
 244
 245                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 246                             identifier = scope.getIdentifier(token.data) ;
 247
 248                             if (identifier == false) {
 249                                 scope.declareIdentifier(token.data, token);
 250                             } else {
 251                                 token.identifier = identifier;
 252                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 253                             }
 254                         }
 255
 256                         token = this.ts.nextTok();
 257                         !this.debug|| print(token.toString());
 258                         /*
 259                         assert token.getType() == Token.SEMI ||
 260                                 token.getType() == Token.ASSIGN ||
 261                                 token.getType() == Token.COMMA ||
 262                                 token.getType() == Token.IN;
 263                         */
 264                         if (token.name == "IN") {
 265                             break;
 266                         } else {
 267                             //var bn = this.braceNesting;
 268                             this.parseExpression();
 269                             //this.braceNesting = bn;
 270                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 271
 272                             token = this.ts.lookTok(1);
 273                             !this.debug|| print("AFTER EXP: " + token.toString());
 274                             if (token.data == ';') {
 275                                 break;
 276                             }
 277                         }
 278                     }
 279                     break;
 280                 case "KEYW.FUNCTION":
 281                     //println("<i>"+token.data+"</i>");
 282                      var bn = this.braceNesting;
 283                     this.parseFunctionDeclaration();
 284                      this.braceNesting = bn;
 285                     break;
 286
 287                 case "PUNC.LEFT_CURLY": // {
 288                     //println("<i>"+token.data+"</i>");
 289                     isObjectLitAr.push(false);
 290                     this.braceNesting++;
 291
 292                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 293                     break;
 294
 295                 case "PUNC.RIGHT_CURLY": // }
 296                     //println("<i>"+token.data+"</i>");
 297                     this.braceNesting--;
 298                     isObjectLitAr.pop();
 299                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 300                         //assert braceNesting >= scope.getBra ceNesting();
 301
 302                     if (this.braceNesting < expressionBraceNesting) {
 303                         var ls = this.scopes.pop();
 304                         ls.getUsedSymbols();
 305                         // eat symbol if we are currently at {
 306                         if (this.ts.look(0).data == '{') {
 307                             this.ts.nextTok();
 308                         }
 309
 310                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 311                         return;
 312                     }
 313                     break;
 314
 315                 case "KEYW.WITH":
 316                     //println("<i>"+token.data+"</i>");
 317                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 318                         // Inside a 'with' block, it is impossible to figure out
 319                         // statically whether a symbol is a local variable or an
 320                         // object member. As a consequence, the only thing we can
 321                         // do is turn the obfuscation off for the highest scope
 322                         // containing the 'with' block.
 323                         this.protectScopeFromObfuscation(scope);
 324                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 325                     }
 326                     break;
 327
 328                 case "KEYW.CATCH":
 329                     //println("<i>"+token.data+"</i>");
 330                     this.parseCatch();
 331                     break;
 332                 /*
 333                 case Token.SPECIALCOMMENT:
 334                         if (mode == BUILDING_SYMBOL_TREE) {
 335                             protectScopeFromObfuscation(scope);
 336                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 337                         }
 338                         break;
 339                 */
 340
 341                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 342                 case "STRN.SINGLE_QUOTE":
 343                     //println("<i>"+token.data+"</i>");
 344                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 345                         // then we are in an object lit.. -> we need to flag the brace as such...
 346                         isObjectLitAr.pop();
 347                         isObjectLitAr.push(true);
 348                         //print(">>>>>> OBJLIT REPUSH(true)");
 349                     }
 350                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 351
 352                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 353                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 354                         // see if we can replace..
 355                         // remove the quotes..
 356                         // should do a bit more checking!!!! (what about wierd char's in the string..
 357                         var str = token.data.substring(1,token.data.length-1);
 358                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 359                             token.outData = str;
 360                         }
 361
 362
 363
 364                     }
 365
 366
 367
 368                     break;
 369
 370                 case "NAME.NAME":
 371
 372                     //print("DEAL WITH NAME:");
 373                     // got identifier..
 374
 375                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 376                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 377                         isObjectLitAr.pop();
 378                         isObjectLitAr.push(true);
 379                         //print(">>>>>> OBJLIT REPUSH(true)");
 380                         //println("<i>"+token.data+"</i>");
 381                         break;
 382                     }
 383                    // print("DEAL WITH obj lit:");
 384                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 385
 386                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 387                         // skip, it's an object lit key..
 388                         //println("<i>"+token.data+"</i>");
 389                         break;
 390                     }
 391
 392
 393                     // skip anyting with "." before it..!!
 394
 395                     if (this.ts.lookTok(-1).data == ".") {
 396                         // skip, it's an object prop.
 397                         //println("<i>"+token.data+"</i>");
 398                         break;
 399                     }
 400                     symbol = token.data;
 401                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 402
 403                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 404
 405                         //print ("MUNGE?" + symbol);
 406
 407                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 408
 409                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 410                         identifier = this.getIdentifier(symbol, scope);
 411
 412                         if (identifier == false) {
 413 // BUG!find out where builtin is defined...
 414                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 415                                 // Here, we found an undeclared and un-namespaced symbol that is
 416                                 // 3 characters or less in length. Declare it in the global scope.
 417                                 // We don't need to declare longer symbols since they won't cause
 418                                 // any conflict with other munged symbols.
 419                                 this.globalScope.declareIdentifier(symbol, token);
 420                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 421                             }
 422
 423                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 424                         } else {
 425                             token.identifier = identifier;
 426                             identifier.refcount++;
 427                         }
 428                     }
 429
 430                     break;
 431                     //println("<B>SID</B>");
 432                 default:
 433                     if (token.type != 'KEYW') {
 434                         break;
 435                     }
 436                    // print("Check eval:");
 437
 438                     symbol = token.data;
 439
 440                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 441
 442                         if (symbol == "eval") {
 443                             // look back one and see if we can find a comment!!!
 444                             if (this.ts.look(-1).type == "COMM") {
 445                                 // look for eval:var:noreplace\n
 446                                 var _t = this;
 447                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 448
 449                                     var hi = _t.getIdentifier(a, scope);
 450                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 451                                     if (hi) {
 452                                      //   println("PROTECT "+a+" from munge");
 453                                         hi.toMunge = false;
 454                                     }
 455
 456                                 });
 457
 458
 459                             } else {
 460
 461
 462                                 this.protectScopeFromObfuscation(scope);
 463                                 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);
 464                             }
 465
 466                         }
 467
 468                     }
 469                     break;
 470
 471
 472             } // end switch
 473
 474
 475             //this.timerPrint("parseScope TOK : " + token.toString());
 476             token = this.ts.nextTok();
 477             //if (this.ts.nextT()) break;
 478
 479         }
 480         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 481     },
 482
 483
 484     parseExpression : function() {
 485
 486         // Parse the expression until we encounter a comma or a semi-colon
 487         // in the same brace nesting, bracket nesting and paren nesting.
 488         // Parse functions if any...
 489         //println("<i>EXP</i><BR/>");
 490         !this.debug || print("PARSE EXPR");
 491         var symbol;
 492         var token;
 493         var currentScope;
 494         var identifier;
 495
 496         var expressionBraceNesting = this.braceNesting;
 497         var bracketNesting = 0;
 498         var parensNesting = 0;
 499         var isInObjectLitAr;
 500         var isObjectLitAr = [ false ];
 501         while (token = this.ts.lookTok()) {
 502
 503
 504
 505             currentScope = this.scopes[this.scopes.length-1];
 506
 507             //println("<i>"+token.data+"</i>");
 508             //this.log("EXP:" + token.data);
 509             switch (token.type) {
 510                 case 'PUNC':
 511                     switch(token.data) {
 512
 513                         case ';':
 514                         case ',':
 515                             if (this.braceNesting == expressionBraceNesting &&
 516                                     bracketNesting == 0 &&
 517                                     parensNesting == 0) {
 518
 519                                 return;
 520                             }
 521                             break;
 522
 523
 524
 525                         case '{': //Token.LC:
 526                             isObjectLitAr.push(false);
 527
 528                             this.braceNesting++;
 529                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 530                             break;
 531
 532                         case '}': //Token.RC:
 533                             this.braceNesting--;
 534                             isObjectLitAr.pop();
 535                             //print(">>>>> EXP POP" + this.braceNesting);
 536                            // assert braceNesting >= expressionBraceNesting;
 537                             break;
 538
 539                         case '[': //Token.LB:
 540                             bracketNesting++;
 541                             break;
 542
 543                         case ']': //Token.RB:
 544                             bracketNesting--;
 545                             break;
 546
 547                         case '(': //Token.LP:
 548                             parensNesting++;
 549                             break;
 550
 551                         case ')': //Token.RP:
 552                             parensNesting--;
 553                             break;
 554                     }
 555                     break;
 556
 557                 case 'STRN': // used for object lit detection..
 558                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 559                         // then we are in an object lit.. -> we need to flag the brace as such...
 560                         isObjectLitAr.pop();
 561                         isObjectLitAr.push(true);
 562                         //print(">>>>> EXP PUSH(true)");
 563                     }
 564
 565
 566
 567                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 568                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 569                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 570                         // see if we can replace..
 571                         // remove the quotes..
 572                         var str = token.data.substring(1,token.data.length-1);
 573                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 574                             token.outData = str;
 575                         }
 576
 577
 578
 579                     }
 580
 581                     break;
 582
 583
 584
 585                 case 'NAME':
 586
 587                     symbol = token.data;
 588
 589                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 590                         // then we are in an object lit.. -> we need to flag the brace as such...
 591                         isObjectLitAr.pop();
 592                         isObjectLitAr.push(true);
 593                          //print(">>>>> EXP  PUSH(true)");
 594                         break;
 595                     }
 596                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 597                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 598                         break;
 599                     }
 600                     //print(this.ts.lookTok(0).data);
 601                     if (this.ts.lookTok(0).data == ".") {
 602                         //skip '.'
 603                         break;
 604                     }
 605
 606                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 607
 608                         identifier = this.getIdentifier(symbol, currentScope);
 609                         //println("<B>??</B>");
 610                         if (identifier == false) {
 611
 612                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 613                                 // Here, we found an undeclared and un-namespaced symbol that is
 614                                 // 3 characters or less in length. Declare it in the global scope.
 615                                 // We don't need to declare longer symbols since they won't cause
 616                                 // any conflict with other munged symbols.
 617                                 this.globalScope.declareIdentifier(symbol, token);
 618                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 619                             } else {
 620                                 //println("undeclared")
 621                             }
 622
 623
 624                         } else {
 625                             //println("<B>++</B>");
 626                             token.identifier = identifier;
 627                             identifier.refcount++;
 628                         }
 629
 630                     }
 631                     break;
 632
 633
 634
 635
 636                     //println("<B>EID</B>");
 637                  case 'KEYW':
 638
 639                     if (token.name == "FUNCTION") {
 640
 641                         this.parseFunctionDeclaration();
 642                         break;
 643                     }
 644
 645
 646
 647                     symbol = token.data;
 648                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 649
 650                         if (symbol == "eval") {
 651                             if (this.ts.look(-1).type == 'COMM') {
 652                                 // look for eval:var:noreplace\n
 653                                 var _t = this;
 654                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 655                                     var hi = _t.getIdentifier(a, currentScope);
 656                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 657                                     if (hi) {
 658                                       //  println("PROTECT "+a+" from munge");
 659                                         hi.toMunge = false;
 660                                     }
 661
 662
 663                                 });
 664
 665                             } else {
 666                                 this.protectScopeFromObfuscation(currentScope);
 667                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 668                             }
 669
 670
 671                         }
 672                         break;
 673                     }
 674
 675             }
 676             if (!this.ts.nextTok()) break;
 677         }
 678     },
 679
 680
 681     parseCatch : function() {
 682
 683         var symbol;
 684         var token;
 685         var currentScope;
 686         var identifier;
 687
 688         //token = getToken(-1);
 689         //assert token.getType() == Token.CATCH;
 690         token = this.ts.nextTok();
 691         //assert token.getType() == Token.LP; (
 692         token = this.ts.nextTok();
 693         //assert token.getType() == Token.NAME;
 694
 695         symbol = token.data;
 696         currentScope = this.scopes[this.scopes.length-1];
 697
 698         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 699             // We must declare the exception identifier in the containing function
 700             // scope to avoid errors related to the obfuscation process. No need to
 701             // display a warning if the symbol was already declared here...
 702             currentScope.declareIdentifier(symbol, token);
 703         } else {
 704             //?? why inc the refcount?? - that should be set when building the tree???
 705             identifier = this.getIdentifier(symbol, currentScope);
 706             identifier.refcount++;
 707         }
 708
 709         token = this.ts.nextTok();
 710         //assert token.getType() == Token.RP; // )
 711     },
 712
 713     parseFunctionDeclaration : function()
 714     {
 715        // print("PARSE FUNCTION");
 716         var symbol;
 717         var token;
 718         var currentScope  = false;
 719         var fnScope = false;
 720         var identifier;
 721         //this.logR("<B>PARSING FUNCTION</B>");
 722         currentScope = this.scopes[this.scopes.length-1];
 723
 724         token = this.ts.nextTok();
 725         if (token.type == "NAME") {
 726             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 727                 // Get the name of the function and declare it in the current scope.
 728                 symbol = token.data;
 729                 if (currentScope.getIdentifier(symbol) != false) {
 730                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 731                 }
 732                 currentScope.declareIdentifier(symbol,token);
 733             }
 734             token =  this.ts.nextTok();
 735         }
 736
 737         //assert token.getType() == Token.LP;
 738         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 739             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 740
 741             //println("STORING SCOPE" + this.ts.cursor);
 742
 743             this.indexedScopes[this.ts.cursor] = fnScope;
 744
 745         } else {
 746             //qln("FETCHING SCOPE" + this.ts.cursor);
 747             fnScope = this.indexedScopes[this.ts.cursor];
 748
 749         }
 750
 751         // Parse function arguments.
 752         var argpos = 0;
 753         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 754             token = this.ts.nextTok();
 755            // print ("FUNC ARGS: " + token.toString())
 756             //assert token.getType() == Token.NAME ||
 757             //        token.getType() == Token.COMMA;
 758             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 759                 symbol = token.data;
 760                 identifier = fnScope.declareIdentifier(symbol,token);
 761                 if (symbol == "$super" && argpos == 0) {
 762                     // Exception for Prototype 1.6...
 763                     identifier.preventMunging();
 764                 }
 765                 argpos++;
 766             }
 767         }
 768
 769         token = this.ts.nextTok();
 770         // assert token.getType() == Token.LC;
 771         this.braceNesting++;
 772
 773         token = this.ts.nextTok();
 774         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 775             /*
 776
 777             NOT SUPPORTED YET!?!!?!
 778
 779             // This is a hint. Hints are empty statements that look like
 780             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 781             // to prevent specific symbols from getting obfuscated (some heretic
 782             // implementations, such as Prototype 1.6, require specific variable
 783             // names, such as $super for example, in order to work appropriately.
 784             // Note: right now, only "nomunge" is supported in the right hand side
 785             // of a hint. However, in the future, the right hand side may contain
 786             // other values.
 787             consumeToken();
 788             String hints = token.getValue();
 789             // Remove the leading and trailing quotes...
 790             hints = hints.substring(1, hints.length() - 1).trim();
 791             StringTokenizer st1 = new StringTokenizer(hints, ",");
 792             while (st1.hasMoreTokens()) {
 793                 String hint = st1.nextToken();
 794                 int idx = hint.indexOf(':');
 795                 if (idx <= 0 || idx >= hint.length() - 1) {
 796                     if (mode == BUILDING_SYMBOL_TREE) {
 797                         // No need to report the error twice, hence the test...
 798                         this.warn("Invalid hint syntax: " + hint, true);
 799                     }
 800                     break;
 801                 }
 802                 String variableName = hint.substring(0, idx).trim();
 803                 String variableType = hint.substring(idx + 1).trim();
 804                 if (mode == BUILDING_SYMBOL_TREE) {
 805                     fnScope.addHint(variableName, variableType);
 806                 } else if (mode == CHECKING_SYMBOL_TREE) {
 807                     identifier = fnScope.getIdentifier(variableName);
 808                     if (identifier != null) {
 809                         if (variableType.equals("nomunge")) {
 810                             identifier.preventMunging();
 811                         } else {
 812                             this.warn("Unsupported hint value: " + hint, true);
 813                         }
 814                     } else {
 815                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 816                     }
 817                 }
 818             }
 819             */
 820         }
 821
 822         this.parseScope(fnScope);
 823         // now pop it off the stack!!!
 824
 825
 826
 827     },
 828
 829     protectScopeFromObfuscation : function(scope) {
 830             //assert scope != null;
 831
 832         if (scope == this.globalScope) {
 833             // The global scope does not get obfuscated,
 834             // so we don't need to worry about it...
 835             return;
 836         }
 837
 838         // Find the highest local scope containing the specified scope.
 839         while (scope && scope.parent != this.globalScope) {
 840             scope = scope.parent;
 841         }
 842
 843         //assert scope.getParentScope() == globalScope;
 844         scope.preventMunging();
 845     },
 846
 847     getIdentifier: function(symbol, scope) {
 848         var identifier;
 849         while (scope != false) {
 850             identifier = scope.getIdentifier(symbol);
 851             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 852             if (identifier) {
 853                 return identifier;
 854             }
 855             scope = scope.parent;
 856         }
 857         return false;
 858     }
 859 };