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