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) + 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         print(">>> 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         token = this.ts.lookTok(1);
 212         while (token) {
 213           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 214
 215             this.log(token.data);
 216             if (token.type == 'NAME') {
 217             //    print('*' + token.data);
 218             }
 219             switch(token.type + '.' + token.name) {
 220                 case "KEYW.VAR":
 221                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 222
 223                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 224                     while (true) {
 225                         token = this.ts.nextTok();
 226                         !this.debug|| print( token.toString());
 227
 228                         if (!token) { // can return false at EOF!
 229                             break;
 230                         }
 231                         if (token.name == "VAR") { // kludge..
 232                             continue;
 233                         }
 234                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 235                         if (token.type !="NAME") {
 236                             print(token.toString());
 237                             print( "var without ident");
 238                             Seed.quit()
 239                         }
 240
 241
 242                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 243                             identifier = scope.getIdentifier(token.data) ;
 244
 245                             if (identifier == false) {
 246                                 scope.declareIdentifier(token.data, token);
 247                             } else {
 248                                 token.identifier = identifier;
 249                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 250                             }
 251                         }
 252
 253                         token = this.ts.nextTok();
 254                         !this.debug|| print(token.toString());
 255                         /*
 256                         assert token.getType() == Token.SEMI ||
 257                                 token.getType() == Token.ASSIGN ||
 258                                 token.getType() == Token.COMMA ||
 259                                 token.getType() == Token.IN;
 260                         */
 261                         if (token.name == "IN") {
 262                             break;
 263                         } else {
 264                             var bn = this.braceNesting;
 265                             this.parseExpression();
 266                             this.braceNesting = bn;
 267                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 268
 269                             token = this.ts.lookTok(1);
 270                             !this.debug|| print("AFTER EXP: " + token.toString());
 271                             if (token.data == ';') {
 272                                 break;
 273                             }
 274                         }
 275                     }
 276                     break;
 277                 case "KEYW.FUNCTION":
 278                     //println("<i>"+token.data+"</i>");
 279                      var bn = this.braceNesting;
 280                     this.parseFunctionDeclaration();
 281                      this.braceNesting = bn;
 282                     break;
 283
 284                 case "PUNC.LEFT_CURLY": // {
 285                     //println("<i>"+token.data+"</i>");
 286                     isObjectLitAr.push(false);
 287                     this.braceNesting++;
 288
 289                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 290                     break;
 291
 292                 case "PUNC.RIGHT_CURLY": // }
 293                     //println("<i>"+token.data+"</i>");
 294                     this.braceNesting--;
 295                     isObjectLitAr.pop();
 296                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 297                         //assert braceNesting >= scope.getBra ceNesting();
 298
 299                     if (this.braceNesting < 0) {
 300                         var ls = this.scopes.pop();
 301                         ls.getUsedSymbols();
 302                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 303                         return;
 304                     }
 305                     break;
 306
 307                 case "KEYW.WITH":
 308                     //println("<i>"+token.data+"</i>");
 309                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 310                         // Inside a 'with' block, it is impossible to figure out
 311                         // statically whether a symbol is a local variable or an
 312                         // object member. As a consequence, the only thing we can
 313                         // do is turn the obfuscation off for the highest scope
 314                         // containing the 'with' block.
 315                         this.protectScopeFromObfuscation(scope);
 316                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 317                     }
 318                     break;
 319
 320                 case "KEYW.CATCH":
 321                     //println("<i>"+token.data+"</i>");
 322                     this.parseCatch();
 323                     break;
 324                 /*
 325                 case Token.SPECIALCOMMENT:
 326                         if (mode == BUILDING_SYMBOL_TREE) {
 327                             protectScopeFromObfuscation(scope);
 328                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 329                         }
 330                         break;
 331                 */
 332
 333                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 334                 case "STRN.SINGLE_QUOTE":
 335                     //println("<i>"+token.data+"</i>");
 336                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 337                         // then we are in an object lit.. -> we need to flag the brace as such...
 338                         isObjectLitAr.pop();
 339                         isObjectLitAr.push(true);
 340                         //print(">>>>>> OBJLIT REPUSH(true)");
 341                     }
 342                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 343
 344                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 345                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 346                         // see if we can replace..
 347                         // remove the quotes..
 348                         // should do a bit more checking!!!! (what about wierd char's in the string..
 349                         var str = token.data.substring(1,token.data.length-1);
 350                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 351                             token.outData = str;
 352                         }
 353
 354
 355
 356                     }
 357
 358
 359
 360                     break;
 361
 362                 case "NAME.NAME":
 363
 364                     //print("DEAL WITH NAME:");
 365                     // got identifier..
 366
 367                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 368                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 369                         isObjectLitAr.pop();
 370                         isObjectLitAr.push(true);
 371                         //print(">>>>>> OBJLIT REPUSH(true)");
 372                         //println("<i>"+token.data+"</i>");
 373                         break;
 374                     }
 375                    // print("DEAL WITH obj lit:");
 376                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 377
 378                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 379                         // skip, it's an object lit key..
 380                         //println("<i>"+token.data+"</i>");
 381                         break;
 382                     }
 383
 384
 385                     // skip anyting with "." before it..!!
 386
 387                     if (this.ts.lookTok(-1).data == ".") {
 388                         // skip, it's an object prop.
 389                         //println("<i>"+token.data+"</i>");
 390                         break;
 391                     }
 392                     symbol = token.data;
 393                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 394
 395                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 396
 397                         //print ("MUNGE?" + symbol);
 398
 399                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 400
 401                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 402                         identifier = this.getIdentifier(symbol, scope);
 403
 404                         if (identifier == false) {
 405 // BUG!find out where builtin is defined...
 406                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 407                                 // Here, we found an undeclared and un-namespaced symbol that is
 408                                 // 3 characters or less in length. Declare it in the global scope.
 409                                 // We don't need to declare longer symbols since they won't cause
 410                                 // any conflict with other munged symbols.
 411                                 this.globalScope.declareIdentifier(symbol, token);
 412                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 413                             }
 414
 415                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 416                         } else {
 417                             token.identifier = identifier;
 418                             identifier.refcount++;
 419                         }
 420                     }
 421
 422                     break;
 423                     //println("<B>SID</B>");
 424                 default:
 425                     if (token.type != 'KEYW') {
 426                         break;
 427                     }
 428                    // print("Check eval:");
 429
 430                     symbol = token.data;
 431
 432                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 433
 434                         if (symbol == "eval") {
 435                             // look back one and see if we can find a comment!!!
 436                             if (this.ts.look(-1).type == "COMM") {
 437                                 // look for eval:var:noreplace\n
 438                                 var _t = this;
 439                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 440
 441                                     var hi = _t.getIdentifier(a, scope);
 442                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 443                                     if (hi) {
 444                                      //   println("PROTECT "+a+" from munge");
 445                                         hi.toMunge = false;
 446                                     }
 447
 448                                 });
 449
 450
 451                             } else {
 452
 453
 454                                 this.protectScopeFromObfuscation(scope);
 455                                 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);
 456                             }
 457
 458                         }
 459
 460                     }
 461                     break;
 462
 463
 464             } // end switch
 465
 466
 467             //this.timerPrint("parseScope TOK : " + token.toString());
 468             token = this.ts.nextTok();
 469             //if (this.ts.nextT()) break;
 470
 471         }
 472         print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 473     },
 474
 475
 476     parseExpression : function() {
 477
 478         // Parse the expression until we encounter a comma or a semi-colon
 479         // in the same brace nesting, bracket nesting and paren nesting.
 480         // Parse functions if any...
 481         //println("<i>EXP</i><BR/>");
 482         !this.debug || print("PARSE EXPR");
 483         var symbol;
 484         var token;
 485         var currentScope;
 486         var identifier;
 487
 488         var expressionBraceNesting = this.braceNesting;
 489         var bracketNesting = 0;
 490         var parensNesting = 0;
 491         var isInObjectLitAr;
 492         var isObjectLitAr = [ false ];
 493         while (token = this.ts.lookTok()) {
 494
 495
 496
 497             currentScope = this.scopes[this.scopes.length-1];
 498
 499             //println("<i>"+token.data+"</i>");
 500             !this.debug|| print ("EXP" + token.toString());
 501             switch (token.type) {
 502                 case 'PUNC':
 503                     switch(token.data) {
 504
 505                         case ';':
 506                         case ',':
 507                             if (this.braceNesting == expressionBraceNesting &&
 508                                     bracketNesting == 0 &&
 509                                     parensNesting == 0) {
 510
 511                                 return;
 512                             }
 513                             break;
 514
 515
 516
 517                         case '{': //Token.LC:
 518                             isObjectLitAr.push(false);
 519
 520                             this.braceNesting++;
 521                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 522                             break;
 523
 524                         case '}': //Token.RC:
 525                             this.braceNesting--;
 526                             isObjectLitAr.pop();
 527                             //print(">>>>> EXP POP" + this.braceNesting);
 528                            // assert braceNesting >= expressionBraceNesting;
 529                             break;
 530
 531                         case '[': //Token.LB:
 532                             bracketNesting++;
 533                             break;
 534
 535                         case ']': //Token.RB:
 536                             bracketNesting--;
 537                             break;
 538
 539                         case '(': //Token.LP:
 540                             parensNesting++;
 541                             break;
 542
 543                         case ')': //Token.RP:
 544                             parensNesting--;
 545                             break;
 546                     }
 547                     break;
 548
 549                 case 'STRN': // used for object lit detection..
 550                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 551                         // then we are in an object lit.. -> we need to flag the brace as such...
 552                         isObjectLitAr.pop();
 553                         isObjectLitAr.push(true);
 554                         //print(">>>>> EXP PUSH(true)");
 555                     }
 556
 557
 558
 559                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 560                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 561                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 562                         // see if we can replace..
 563                         // remove the quotes..
 564                         var str = token.data.substring(1,token.data.length-1);
 565                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 566                             token.outData = str;
 567                         }
 568
 569
 570
 571                     }
 572
 573                     break;
 574
 575
 576
 577                 case 'NAME':
 578
 579                     symbol = token.data;
 580                     if (this.ts.lookTok(-1).data == "{"  && this.ts.lookTok(1).data == ":") {
 581                         // then we are in an object lit.. -> we need to flag the brace as such...
 582                         isObjectLitAr.pop();
 583                         isObjectLitAr.push(true);
 584                          //print(">>>>> EXP  PUSH(true)");
 585                         break;
 586                     }
 587                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 588                     if (isInObjectLitAr && this.ts.lookTok(-1).data == "," && this.ts.lookTok(1).data == ":") {
 589                         break;
 590                     }
 591
 592                     if (this.ts.lookTok(-1).data == ".") {
 593                         //skip '.'
 594                         break;
 595                     }
 596
 597                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 598
 599                         identifier = this.getIdentifier(symbol, currentScope);
 600                         //println("<B>??</B>");
 601                         if (identifier == false) {
 602
 603                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 604                                 // Here, we found an undeclared and un-namespaced symbol that is
 605                                 // 3 characters or less in length. Declare it in the global scope.
 606                                 // We don't need to declare longer symbols since they won't cause
 607                                 // any conflict with other munged symbols.
 608                                 this.globalScope.declareIdentifier(symbol, token);
 609                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 610                             } else {
 611                                 //println("undeclared")
 612                             }
 613
 614
 615                         } else {
 616                             //println("<B>++</B>");
 617                             token.identifier = identifier;
 618                             identifier.refcount++;
 619                         }
 620
 621                     }
 622                     break;
 623
 624
 625
 626
 627                     //println("<B>EID</B>");
 628                  case 'KEYW':
 629
 630                     if (token.name == "FUNCTION") {
 631
 632                         this.parseFunctionDeclaration();
 633                         break;
 634                     }
 635
 636
 637
 638                     symbol = token.data;
 639                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 640
 641                         if (symbol == "eval") {
 642                             if (this.ts.look(-1).type == 'COMM') {
 643                                 // look for eval:var:noreplace\n
 644                                 var _t = this;
 645                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 646                                     var hi = _t.getIdentifier(a, currentScope);
 647                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 648                                     if (hi) {
 649                                       //  println("PROTECT "+a+" from munge");
 650                                         hi.toMunge = false;
 651                                     }
 652
 653
 654                                 });
 655
 656                             } else {
 657                                 this.protectScopeFromObfuscation(currentScope);
 658                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 659                             }
 660
 661
 662                         }
 663                         break;
 664                     }
 665
 666             }
 667             if (!this.ts.nextTok()) break;
 668         }
 669     },
 670
 671
 672     parseCatch : function() {
 673
 674         var symbol;
 675         var token;
 676         var currentScope;
 677         var identifier;
 678
 679         //token = getToken(-1);
 680         //assert token.getType() == Token.CATCH;
 681         token = this.ts.nextTok();
 682         //assert token.getType() == Token.LP; (
 683         token = this.ts.nextTok();
 684         //assert token.getType() == Token.NAME;
 685
 686         symbol = token.data;
 687         currentScope = this.scopes[this.scopes.length-1];
 688
 689         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 690             // We must declare the exception identifier in the containing function
 691             // scope to avoid errors related to the obfuscation process. No need to
 692             // display a warning if the symbol was already declared here...
 693             currentScope.declareIdentifier(symbol, token);
 694         } else {
 695             //?? why inc the refcount?? - that should be set when building the tree???
 696             identifier = this.getIdentifier(symbol, currentScope);
 697             identifier.refcount++;
 698         }
 699
 700         token = this.ts.nextTok();
 701         //assert token.getType() == Token.RP; // )
 702     },
 703
 704     parseFunctionDeclaration : function()
 705     {
 706        // print("PARSE FUNCTION");
 707         var symbol;
 708         var token;
 709         var currentScope  = false;
 710         var fnScope = false;
 711         var identifier;
 712         //this.logR("<B>PARSING FUNCTION</B>");
 713         currentScope = this.scopes[this.scopes.length-1];
 714
 715         token = this.ts.nextTok();
 716         if (token.type == "NAME") {
 717             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 718                 // Get the name of the function and declare it in the current scope.
 719                 symbol = token.data;
 720                 if (currentScope.getIdentifier(symbol) != false) {
 721                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 722                 }
 723                 currentScope.declareIdentifier(symbol,token);
 724             }
 725             token =  this.ts.nextTok();
 726         }
 727
 728         //assert token.getType() == Token.LP;
 729         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 730             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 731
 732             //println("STORING SCOPE" + this.ts.cursor);
 733
 734             this.indexedScopes[this.ts.cursor] = fnScope;
 735
 736         } else {
 737             //qln("FETCHING SCOPE" + this.ts.cursor);
 738             fnScope = this.indexedScopes[this.ts.cursor];
 739
 740         }
 741
 742         // Parse function arguments.
 743         var argpos = 0;
 744         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 745             token = this.ts.nextTok();
 746            // print ("FUNC ARGS: " + token.toString())
 747             //assert token.getType() == Token.NAME ||
 748             //        token.getType() == Token.COMMA;
 749             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 750                 symbol = token.data;
 751                 identifier = fnScope.declareIdentifier(symbol,token);
 752                 if (symbol == "$super" && argpos == 0) {
 753                     // Exception for Prototype 1.6...
 754                     identifier.preventMunging();
 755                 }
 756                 argpos++;
 757             }
 758         }
 759
 760         token = this.ts.nextTok();
 761         // assert token.getType() == Token.LC;
 762         //this.braceNesting++;
 763
 764         //token = this.ts.nextTok();
 765         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 766             /*
 767
 768             NOT SUPPORTED YET!?!!?!
 769
 770             // This is a hint. Hints are empty statements that look like
 771             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 772             // to prevent specific symbols from getting obfuscated (some heretic
 773             // implementations, such as Prototype 1.6, require specific variable
 774             // names, such as $super for example, in order to work appropriately.
 775             // Note: right now, only "nomunge" is supported in the right hand side
 776             // of a hint. However, in the future, the right hand side may contain
 777             // other values.
 778             consumeToken();
 779             String hints = token.getValue();
 780             // Remove the leading and trailing quotes...
 781             hints = hints.substring(1, hints.length() - 1).trim();
 782             StringTokenizer st1 = new StringTokenizer(hints, ",");
 783             while (st1.hasMoreTokens()) {
 784                 String hint = st1.nextToken();
 785                 int idx = hint.indexOf(':');
 786                 if (idx <= 0 || idx >= hint.length() - 1) {
 787                     if (mode == BUILDING_SYMBOL_TREE) {
 788                         // No need to report the error twice, hence the test...
 789                         this.warn("Invalid hint syntax: " + hint, true);
 790                     }
 791                     break;
 792                 }
 793                 String variableName = hint.substring(0, idx).trim();
 794                 String variableType = hint.substring(idx + 1).trim();
 795                 if (mode == BUILDING_SYMBOL_TREE) {
 796                     fnScope.addHint(variableName, variableType);
 797                 } else if (mode == CHECKING_SYMBOL_TREE) {
 798                     identifier = fnScope.getIdentifier(variableName);
 799                     if (identifier != null) {
 800                         if (variableType.equals("nomunge")) {
 801                             identifier.preventMunging();
 802                         } else {
 803                             this.warn("Unsupported hint value: " + hint, true);
 804                         }
 805                     } else {
 806                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 807                     }
 808                 }
 809             }
 810             */
 811         }
 812
 813         this.parseScope(fnScope);
 814         // now pop it off the stack!!!
 815
 816
 817
 818     },
 819
 820     protectScopeFromObfuscation : function(scope) {
 821             //assert scope != null;
 822
 823         if (scope == this.globalScope) {
 824             // The global scope does not get obfuscated,
 825             // so we don't need to worry about it...
 826             return;
 827         }
 828
 829         // Find the highest local scope containing the specified scope.
 830         while (scope && scope.parent != this.globalScope) {
 831             scope = scope.parent;
 832         }
 833
 834         //assert scope.getParentScope() == globalScope;
 835         scope.preventMunging();
 836     },
 837
 838     getIdentifier: function(symbol, scope) {
 839         var identifier;
 840         while (scope != false) {
 841             identifier = scope.getIdentifier(symbol);
 842             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 843             if (identifier) {
 844                 return identifier;
 845             }
 846             scope = scope.parent;
 847         }
 848         return false;
 849     }
 850 };