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

   1 //<Script type="text/javascript">
   2
   3 Scope = imports['JSDOC/Scope.js'].Scope;
   4
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 */
  10
  11 ScopeParser = function(ts) {
  12     this.ts = ts; // {TokenStream}
  13     this.warnings = [];
  14     this.scopes = [];
  15     this.indexedScopes = {};
  16     this.timer = new Date() * 1;
  17     this.debug = false;
  18 }
  19
  20 // list of keywords that should not be used in object literals.
  21 ScopeParser.idents = [
  22         "break",
  23         "case",
  24         "continue",
  25         "default",
  26         "delete",
  27         "do",
  28         "else",
  29         "export",
  30         "false",
  31         "for",
  32         "function",
  33         "if",
  34         "import",
  35         "in",
  36         "new",
  37         "null",
  38         "return",
  39         "switch",
  40         "this",
  41         "true",
  42         "typeof",
  43         "var",
  44         "void",
  45         "while",
  46         "with",
  47
  48         "catch",
  49         "class",
  50         "const",
  51         "debugger",
  52         "enum",
  53         "extends",
  54         "finally",
  55         "super",
  56         "throw",
  57         "try",
  58
  59         "abstract",
  60         "boolean",
  61         "byte",
  62         "char",
  63         "double",
  64         "final",
  65         "float",
  66         "goto",
  67         "implements",
  68         "instanceof",
  69         "int",
  70         "interface",
  71         "long",
  72         "native",
  73         "package",
  74         "private",
  75         "protected",
  76         "public",
  77         "short",
  78         "static",
  79         "synchronized",
  80         "throws",
  81         "transient",
  82                 "include",
  83                 "undefined"
  84 ];
  85
  86
  87 ScopeParser.prototype = {
  88     timer: 0,
  89     timerPrint: function (str) {
  90         var ntime = new Date() * 1;
  91         var tdif =  ntime -this.timer;
  92         this.timer = ntime;
  93         var pref = '';
  94         if (tdif > 100) { //slower ones..
  95             pref = '***';
  96         }
  97         println(pref+'['+tdif+']'+str);
  98
  99     },
 100     warn: function(s) {
 101         //print('****************' + s);
 102         this.warnings.push(s);
 103         //println("WARNING:" + htmlescape(s) + "<BR>");
 104     },
 105     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 106     warnings : false,
 107     ts : false,
 108     scopes : false,
 109     global : false,
 110     mode : "", //"BUILDING_SYMBOL_TREE",
 111     braceNesting : 0,
 112     indexedScopes : false,
 113     munge: true,
 114
 115
 116
 117
 118
 119     buildSymbolTree : function()
 120     {
 121         //println("<PRE>");
 122
 123         this.ts.rewind();
 124         this.braceNesting = 0;
 125         this.scopes = [];
 126
 127
 128
 129
 130         this.globalScope = new  Scope(-1, false, -1, '');
 131         indexedScopes = { 0 : this.globalScope };
 132
 133         this.mode = 'BUILDING_SYMBOL_TREE';
 134         this.parseScope(this.globalScope);
 135
 136         //print("---------------END PASS 1 ---------------- ");
 137
 138     },
 139     mungeSymboltree : function()
 140     {
 141
 142         if (!this.munge) {
 143             return;
 144         }
 145
 146         // One problem with obfuscation resides in the use of undeclared
 147         // and un-namespaced global symbols that are 3 characters or less
 148         // in length. Here is an example:
 149         //
 150         //     var declaredGlobalVar;
 151         //
 152         //     function declaredGlobalFn() {
 153         //         var localvar;
 154         //         localvar = abc; // abc is an undeclared global symbol
 155         //     }
 156         //
 157         // In the example above, there is a slim chance that localvar may be
 158         // munged to 'abc', conflicting with the undeclared global symbol
 159         // abc, creating a potential bug. The following code detects such
 160         // global symbols. This must be done AFTER the entire file has been
 161         // parsed, and BEFORE munging the symbol tree. Note that declaring
 162         // extra symbols in the global scope won't hurt.
 163         //
 164         // Note: Since we go through all the tokens to do this, we also use
 165         // the opportunity to count how many times each identifier is used.
 166
 167         this.ts.rewind();
 168         this.braceNesting = 0;
 169         this.scopes= [];
 170         this.mode = 'PASS2_SYMBOL_TREE';
 171
 172         //println("MUNGING?");
 173
 174         this.parseScope(this.globalScope);
 175         this.globalScope.munge();
 176     },
 177
 178
 179     log : function(str)
 180     {
 181         print ("                    ".substring(0, this.braceNesting*2) + str);
 182
 183         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 184     },
 185     logR : function(str)
 186     {
 187             //println("<B>LOG:</B>" + str + "<BR/>");
 188     },
 189
 190
 191
 192
 193
 194
 195     parseScope : function(scope) // parse a token stream..
 196     {
 197         //this.timerPrint("parseScope EnterScope");
 198         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 199         var symbol;
 200         var token;
 201
 202         var identifier;
 203
 204         var expressionBraceNesting = this.braceNesting;
 205
 206         var parensNesting = 0;
 207
 208         var isObjectLitAr = [ false ];
 209         var isInObjectLitAr;
 210         this.scopes.push(scope);
 211
 212         // for printing stuff..
 213         var scopeIndent = '';
 214         this.scopes.forEach(function() {
 215             scopeIndent += '   ';
 216         });
 217
 218         token = this.ts.lookTok(1);
 219         while (token) {
 220           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 221
 222             //this.log(token.data);
 223             if (token.type == 'NAME') {
 224             //    print('*' + token.data);
 225             }
 226             switch(token.type + '.' + token.name) {
 227                 case "KEYW.VAR":
 228                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 229
 230                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 231                     while (true) {
 232                         token = this.ts.nextTok();
 233                         !this.debug|| print( token.toString());
 234
 235                         if (!token) { // can return false at EOF!
 236                             break;
 237                         }
 238                         if (token.name == "VAR" || token.data == ',') { // kludge..
 239                             continue;
 240                         }
 241                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 242                         if (token.type !="NAME") {
 243                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 244                                 print(this.ts.tokens[i].toString());
 245                             }
 246
 247                             print( "var without ident");
 248                             Seed.quit()
 249                         }
 250
 251
 252                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 253                             identifier = scope.getIdentifier(token.data) ;
 254
 255                             if (identifier == false) {
 256                                 scope.declareIdentifier(token.data, token);
 257                             } else {
 258                                 token.identifier = identifier;
 259                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 260                             }
 261                         }
 262
 263                         token = this.ts.nextTok();
 264                         !this.debug|| print(token.toString());
 265                         /*
 266                         assert token.getType() == Token.SEMI ||
 267                                 token.getType() == Token.ASSIGN ||
 268                                 token.getType() == Token.COMMA ||
 269                                 token.getType() == Token.IN;
 270                         */
 271                         if (token.name == "IN") {
 272                             break;
 273                         } else {
 274                             //var bn = this.braceNesting;
 275                             this.parseExpression();
 276                             //this.braceNesting = bn;
 277                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 278
 279                             token = this.ts.lookTok(1);
 280                             !this.debug|| print("AFTER EXP: " + token.toString());
 281                             if (token.data == ';') {
 282                                 break;
 283                             }
 284                         }
 285                     }
 286                     break;
 287                 case "KEYW.FUNCTION":
 288                     //println("<i>"+token.data+"</i>");
 289                      var bn = this.braceNesting;
 290                     this.parseFunctionDeclaration();
 291                      this.braceNesting = bn;
 292                     break;
 293
 294                 case "PUNC.LEFT_CURLY": // {
 295                     //println("<i>"+token.data+"</i>");
 296                     isObjectLitAr.push(false);
 297                     this.braceNesting++;
 298
 299                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 300                     break;
 301
 302                 case "PUNC.RIGHT_CURLY": // }
 303                     //println("<i>"+token.data+"</i>");
 304                     this.braceNesting--;
 305                     isObjectLitAr.pop();
 306                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 307                         //assert braceNesting >= scope.getBra ceNesting();
 308
 309                     if (this.braceNesting < expressionBraceNesting) {
 310                         var ls = this.scopes.pop();
 311                         ls.getUsedSymbols();
 312                         // eat symbol if we are currently at {
 313                         if (this.ts.look(0).data == '{') {
 314                             this.ts.nextTok();
 315                         }
 316
 317                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 318                         return;
 319                     }
 320                     break;
 321
 322                 case "KEYW.WITH":
 323                     //println("<i>"+token.data+"</i>");
 324                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 325                         // Inside a 'with' block, it is impossible to figure out
 326                         // statically whether a symbol is a local variable or an
 327                         // object member. As a consequence, the only thing we can
 328                         // do is turn the obfuscation off for the highest scope
 329                         // containing the 'with' block.
 330                         this.protectScopeFromObfuscation(scope);
 331                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 332                     }
 333                     break;
 334
 335                 case "KEYW.CATCH":
 336                     //println("<i>"+token.data+"</i>");
 337                     this.parseCatch();
 338                     break;
 339                 /*
 340                 case Token.SPECIALCOMMENT:
 341                         if (mode == BUILDING_SYMBOL_TREE) {
 342                             protectScopeFromObfuscation(scope);
 343                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 344                         }
 345                         break;
 346                 */
 347
 348                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 349                 case "STRN.SINGLE_QUOTE":
 350                     //println("<i>"+token.data+"</i>");
 351                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 352                         // then we are in an object lit.. -> we need to flag the brace as such...
 353                         isObjectLitAr.pop();
 354                         isObjectLitAr.push(true);
 355                         //print(">>>>>> OBJLIT REPUSH(true)");
 356                     }
 357                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 358
 359                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 360                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 361                         // see if we can replace..
 362                         // remove the quotes..
 363                         // should do a bit more checking!!!! (what about wierd char's in the string..
 364                         var str = token.data.substring(1,token.data.length-1);
 365                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 366                             token.outData = str;
 367                         }
 368
 369
 370
 371                     }
 372
 373
 374
 375                     break;
 376
 377                 case "NAME.NAME":
 378
 379                     //print("DEAL WITH NAME:");
 380                     // got identifier..
 381
 382                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 383                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 384                         isObjectLitAr.pop();
 385                         isObjectLitAr.push(true);
 386                         //print(">>>>>> OBJLIT REPUSH(true)");
 387                         //println("<i>"+token.data+"</i>");
 388                         break;
 389                     }
 390                    // print("DEAL WITH obj lit:");
 391                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 392
 393                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 394                         // skip, it's an object lit key..
 395                         //println("<i>"+token.data+"</i>");
 396                         break;
 397                     }
 398
 399
 400                     // skip anyting with "." before it..!!
 401
 402                     if (this.ts.lookTok(-1).data == ".") {
 403                         // skip, it's an object prop.
 404                         //println("<i>"+token.data+"</i>");
 405                         break;
 406                     }
 407                     symbol = token.data;
 408                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 409
 410                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 411
 412                         //print ("MUNGE?" + symbol);
 413
 414                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 415
 416                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 417                         identifier = this.getIdentifier(symbol, scope);
 418
 419                         if (identifier == false) {
 420 // BUG!find out where builtin is defined...
 421                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 422                                 // Here, we found an undeclared and un-namespaced symbol that is
 423                                 // 3 characters or less in length. Declare it in the global scope.
 424                                 // We don't need to declare longer symbols since they won't cause
 425                                 // any conflict with other munged symbols.
 426                                 this.globalScope.declareIdentifier(symbol, token);
 427                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 428                             }
 429
 430                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 431                         } else {
 432                             token.identifier = identifier;
 433                             identifier.refcount++;
 434                         }
 435                     }
 436
 437                     break;
 438                     //println("<B>SID</B>");
 439                 default:
 440                     if (token.type != 'KEYW') {
 441                         break;
 442                     }
 443                    // print("Check eval:");
 444
 445                     symbol = token.data;
 446
 447                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 448
 449                         if (symbol == "eval") {
 450                             // look back one and see if we can find a comment!!!
 451                             if (this.ts.look(-1).type == "COMM") {
 452                                 // look for eval:var:noreplace\n
 453                                 var _t = this;
 454                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 455
 456                                     var hi = _t.getIdentifier(a, scope);
 457                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 458                                     if (hi) {
 459                                      //   println("PROTECT "+a+" from munge");
 460                                         hi.toMunge = false;
 461                                     }
 462
 463                                 });
 464
 465
 466                             } else {
 467
 468
 469                                 this.protectScopeFromObfuscation(scope);
 470                                 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);
 471                             }
 472
 473                         }
 474
 475                     }
 476                     break;
 477
 478
 479             } // end switch
 480
 481
 482             //this.timerPrint("parseScope TOK : " + token.toString());
 483             token = this.ts.nextTok();
 484             //if (this.ts.nextT()) break;
 485
 486         }
 487         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 488     },
 489
 490
 491     parseExpression : function() {
 492
 493         // Parse the expression until we encounter a comma or a semi-colon
 494         // in the same brace nesting, bracket nesting and paren nesting.
 495         // Parse functions if any...
 496         //println("<i>EXP</i><BR/>");
 497         !this.debug || print("PARSE EXPR");
 498         var symbol;
 499         var token;
 500         var currentScope;
 501         var identifier;
 502
 503         var expressionBraceNesting = this.braceNesting;
 504         var bracketNesting = 0;
 505         var parensNesting = 0;
 506         var isInObjectLitAr;
 507         var isObjectLitAr = [ false ];
 508         while (token = this.ts.lookTok()) {
 509
 510
 511
 512             currentScope = this.scopes[this.scopes.length-1];
 513
 514             //println("<i>"+token.data+"</i>");
 515             //this.log("EXP:" + token.data);
 516             switch (token.type) {
 517                 case 'PUNC':
 518                     switch(token.data) {
 519
 520                         case ';':
 521                         case ',':
 522                             if (this.braceNesting == expressionBraceNesting &&
 523                                     bracketNesting == 0 &&
 524                                     parensNesting == 0) {
 525
 526                                 return;
 527                             }
 528                             break;
 529
 530
 531
 532                         case '{': //Token.LC:
 533                             isObjectLitAr.push(false);
 534
 535                             this.braceNesting++;
 536                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 537                             break;
 538
 539                         case '}': //Token.RC:
 540                             this.braceNesting--;
 541                             isObjectLitAr.pop();
 542                             //print(">>>>> EXP POP" + this.braceNesting);
 543                            // assert braceNesting >= expressionBraceNesting;
 544                             break;
 545
 546                         case '[': //Token.LB:
 547                             bracketNesting++;
 548                             break;
 549
 550                         case ']': //Token.RB:
 551                             bracketNesting--;
 552                             break;
 553
 554                         case '(': //Token.LP:
 555                             parensNesting++;
 556                             break;
 557
 558                         case ')': //Token.RP:
 559                             parensNesting--;
 560                             break;
 561                     }
 562                     break;
 563
 564                 case 'STRN': // used for object lit detection..
 565                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 566                         // then we are in an object lit.. -> we need to flag the brace as such...
 567                         isObjectLitAr.pop();
 568                         isObjectLitAr.push(true);
 569                         //print(">>>>> EXP PUSH(true)");
 570                     }
 571
 572
 573
 574                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 575                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 576                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 577                         // see if we can replace..
 578                         // remove the quotes..
 579                         var str = token.data.substring(1,token.data.length-1);
 580                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 581                             token.outData = str;
 582                         }
 583
 584
 585
 586                     }
 587
 588                     break;
 589
 590
 591
 592                 case 'NAME':
 593
 594                     symbol = token.data;
 595                     print("in NAME = " + token.toString());
 596                     print("in NAME 0: " + this.ts.look(0).toString());
 597                     print("in NAME 2: " + this.ts.lookTok(2).toString());
 598                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 599                         // then we are in an object lit.. -> we need to flag the brace as such...
 600                         isObjectLitAr.pop();
 601                         isObjectLitAr.push(true);
 602                          //print(">>>>> EXP  PUSH(true)");
 603                         break;
 604                     }
 605
 606                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 607                     print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 608
 609                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 610                         break;
 611                     }
 612                     //print(this.ts.lookTok(0).data);
 613                     if (this.ts.lookTok(0).data == ".") {
 614                         //skip '.'
 615                         break;
 616                     }
 617
 618                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 619
 620                         identifier = this.getIdentifier(symbol, currentScope);
 621                         //println("<B>??</B>");
 622                         if (identifier == false) {
 623
 624                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 625                                 // Here, we found an undeclared and un-namespaced symbol that is
 626                                 // 3 characters or less in length. Declare it in the global scope.
 627                                 // We don't need to declare longer symbols since they won't cause
 628                                 // any conflict with other munged symbols.
 629                                 this.globalScope.declareIdentifier(symbol, token);
 630                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 631                             } else {
 632                                 //println("undeclared")
 633                             }
 634
 635
 636                         } else {
 637                             //println("<B>++</B>");
 638                             token.identifier = identifier;
 639                             identifier.refcount++;
 640                         }
 641
 642                     }
 643                     break;
 644
 645
 646
 647
 648                     //println("<B>EID</B>");
 649                  case 'KEYW':
 650
 651                     if (token.name == "FUNCTION") {
 652
 653                         this.parseFunctionDeclaration();
 654                         break;
 655                     }
 656
 657
 658
 659                     symbol = token.data;
 660                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 661
 662                         if (symbol == "eval") {
 663                             if (this.ts.look(-1).type == 'COMM') {
 664                                 // look for eval:var:noreplace\n
 665                                 var _t = this;
 666                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 667                                     var hi = _t.getIdentifier(a, currentScope);
 668                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 669                                     if (hi) {
 670                                       //  println("PROTECT "+a+" from munge");
 671                                         hi.toMunge = false;
 672                                     }
 673
 674
 675                                 });
 676
 677                             } else {
 678                                 this.protectScopeFromObfuscation(currentScope);
 679                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 680                             }
 681
 682
 683                         }
 684                         break;
 685                     }
 686
 687             }
 688             if (!this.ts.nextTok()) break;
 689         }
 690     },
 691
 692
 693     parseCatch : function() {
 694
 695         var symbol;
 696         var token;
 697         var currentScope;
 698         var identifier;
 699
 700         //token = getToken(-1);
 701         //assert token.getType() == Token.CATCH;
 702         token = this.ts.nextTok();
 703         //assert token.getType() == Token.LP; (
 704         token = this.ts.nextTok();
 705         //assert token.getType() == Token.NAME;
 706
 707         symbol = token.data;
 708         currentScope = this.scopes[this.scopes.length-1];
 709
 710         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 711             // We must declare the exception identifier in the containing function
 712             // scope to avoid errors related to the obfuscation process. No need to
 713             // display a warning if the symbol was already declared here...
 714             currentScope.declareIdentifier(symbol, token);
 715         } else {
 716             //?? why inc the refcount?? - that should be set when building the tree???
 717             identifier = this.getIdentifier(symbol, currentScope);
 718             identifier.refcount++;
 719         }
 720
 721         token = this.ts.nextTok();
 722         //assert token.getType() == Token.RP; // )
 723     },
 724
 725     parseFunctionDeclaration : function()
 726     {
 727        // print("PARSE FUNCTION");
 728         var symbol;
 729         var token;
 730         var currentScope  = false;
 731         var fnScope = false;
 732         var identifier;
 733         //this.logR("<B>PARSING FUNCTION</B>");
 734         currentScope = this.scopes[this.scopes.length-1];
 735
 736         token = this.ts.nextTok();
 737         if (token.type == "NAME") {
 738             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 739                 // Get the name of the function and declare it in the current scope.
 740                 symbol = token.data;
 741                 if (currentScope.getIdentifier(symbol) != false) {
 742                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 743                 }
 744                 currentScope.declareIdentifier(symbol,token);
 745             }
 746             token =  this.ts.nextTok();
 747         }
 748
 749         //assert token.getType() == Token.LP;
 750         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 751             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 752
 753             //println("STORING SCOPE" + this.ts.cursor);
 754
 755             this.indexedScopes[this.ts.cursor] = fnScope;
 756
 757         } else {
 758             //qln("FETCHING SCOPE" + this.ts.cursor);
 759             fnScope = this.indexedScopes[this.ts.cursor];
 760
 761         }
 762
 763         // Parse function arguments.
 764         var argpos = 0;
 765         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 766             token = this.ts.nextTok();
 767            // print ("FUNC ARGS: " + token.toString())
 768             //assert token.getType() == Token.NAME ||
 769             //        token.getType() == Token.COMMA;
 770             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 771                 symbol = token.data;
 772                 identifier = fnScope.declareIdentifier(symbol,token);
 773                 if (symbol == "$super" && argpos == 0) {
 774                     // Exception for Prototype 1.6...
 775                     identifier.preventMunging();
 776                 }
 777                 argpos++;
 778             }
 779         }
 780
 781         token = this.ts.nextTok();
 782         // assert token.getType() == Token.LC;
 783         this.braceNesting++;
 784
 785         token = this.ts.nextTok();
 786         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 787             /*
 788
 789             NOT SUPPORTED YET!?!!?!
 790
 791             // This is a hint. Hints are empty statements that look like
 792             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 793             // to prevent specific symbols from getting obfuscated (some heretic
 794             // implementations, such as Prototype 1.6, require specific variable
 795             // names, such as $super for example, in order to work appropriately.
 796             // Note: right now, only "nomunge" is supported in the right hand side
 797             // of a hint. However, in the future, the right hand side may contain
 798             // other values.
 799             consumeToken();
 800             String hints = token.getValue();
 801             // Remove the leading and trailing quotes...
 802             hints = hints.substring(1, hints.length() - 1).trim();
 803             StringTokenizer st1 = new StringTokenizer(hints, ",");
 804             while (st1.hasMoreTokens()) {
 805                 String hint = st1.nextToken();
 806                 int idx = hint.indexOf(':');
 807                 if (idx <= 0 || idx >= hint.length() - 1) {
 808                     if (mode == BUILDING_SYMBOL_TREE) {
 809                         // No need to report the error twice, hence the test...
 810                         this.warn("Invalid hint syntax: " + hint, true);
 811                     }
 812                     break;
 813                 }
 814                 String variableName = hint.substring(0, idx).trim();
 815                 String variableType = hint.substring(idx + 1).trim();
 816                 if (mode == BUILDING_SYMBOL_TREE) {
 817                     fnScope.addHint(variableName, variableType);
 818                 } else if (mode == CHECKING_SYMBOL_TREE) {
 819                     identifier = fnScope.getIdentifier(variableName);
 820                     if (identifier != null) {
 821                         if (variableType.equals("nomunge")) {
 822                             identifier.preventMunging();
 823                         } else {
 824                             this.warn("Unsupported hint value: " + hint, true);
 825                         }
 826                     } else {
 827                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 828                     }
 829                 }
 830             }
 831             */
 832         }
 833
 834         this.parseScope(fnScope);
 835         // now pop it off the stack!!!
 836
 837
 838
 839     },
 840
 841     protectScopeFromObfuscation : function(scope) {
 842             //assert scope != null;
 843
 844         if (scope == this.globalScope) {
 845             // The global scope does not get obfuscated,
 846             // so we don't need to worry about it...
 847             return;
 848         }
 849
 850         // Find the highest local scope containing the specified scope.
 851         while (scope && scope.parent != this.globalScope) {
 852             scope = scope.parent;
 853         }
 854
 855         //assert scope.getParentScope() == globalScope;
 856         scope.preventMunging();
 857     },
 858
 859     getIdentifier: function(symbol, scope) {
 860         var identifier;
 861         while (scope != false) {
 862             identifier = scope.getIdentifier(symbol);
 863             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 864             if (identifier) {
 865                 return identifier;
 866             }
 867             scope = scope.parent;
 868         }
 869         return false;
 870     }
 871 };