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