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

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