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