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