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