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         var scopeIndent = '';
 213         this.scopes.forEach(function() {
 214             scopeIndent += '   ';
 215         });
 216         print(scopeIndent + ">> ENTER SCOPE");
 217
 218
 219         token = this.ts.lookTok(1);
 220         while (token) {
 221           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 222
 223             print(scopeIndent + '' + token.data);
 224             //this.log(token.data);
 225             if (token.type == 'NAME') {
 226             //    print('*' + token.data);
 227             }
 228             switch(token.type + '.' + token.name) {
 229                 case "KEYW.VAR":
 230                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 231
 232                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 233                     while (true) {
 234                         token = this.ts.nextTok();
 235                         !this.debug|| print( token.toString());
 236
 237                         if (!token) { // can return false at EOF!
 238                             break;
 239                         }
 240                         if (token.name == "VAR" || token.data == ',') { // kludge..
 241                             continue;
 242                         }
 243                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 244                         if (token.type !="NAME") {
 245                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 246                                 print(this.ts.tokens[i].toString());
 247                             }
 248
 249                             print( "var without ident");
 250                             Seed.quit()
 251                         }
 252
 253
 254                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 255                             identifier = scope.getIdentifier(token.data) ;
 256
 257                             if (identifier == false) {
 258                                 scope.declareIdentifier(token.data, token);
 259                             } else {
 260                                 token.identifier = identifier;
 261                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 262                             }
 263                         }
 264
 265                         token = this.ts.nextTok();
 266                         !this.debug|| print(token.toString());
 267                         /*
 268                         assert token.getType() == Token.SEMI ||
 269                                 token.getType() == Token.ASSIGN ||
 270                                 token.getType() == Token.COMMA ||
 271                                 token.getType() == Token.IN;
 272                         */
 273                         if (token.name == "IN") {
 274                             break;
 275                         } else {
 276                             //var bn = this.braceNesting;
 277                             this.parseExpression();
 278                             //this.braceNesting = bn;
 279                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 280
 281                             token = this.ts.lookTok(1);
 282                             !this.debug|| print("AFTER EXP: " + token.toString());
 283                             if (token.data == ';') {
 284                                 break;
 285                             }
 286                         }
 287                     }
 288                     break;
 289                 case "KEYW.FUNCTION":
 290                     //println("<i>"+token.data+"</i>");
 291                      var bn = this.braceNesting;
 292                     this.parseFunctionDeclaration();
 293                      this.braceNesting = bn;
 294                     break;
 295
 296                 case "PUNC.LEFT_CURLY": // {
 297                     //println("<i>"+token.data+"</i>");
 298                     isObjectLitAr.push(false);
 299                     this.braceNesting++;
 300
 301                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 302                     break;
 303
 304                 case "PUNC.RIGHT_CURLY": // }
 305                     //println("<i>"+token.data+"</i>");
 306                     this.braceNesting--;
 307                     isObjectLitAr.pop();
 308                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 309                         //assert braceNesting >= scope.getBra ceNesting();
 310
 311                     if (this.braceNesting < expressionBraceNesting) {
 312                         var ls = this.scopes.pop();
 313                         ls.getUsedSymbols();
 314                         // eat symbol if we are currently at {
 315                         if (this.ts.look(0).data == '{') {
 316                             this.ts.nextTok();
 317                         }
 318
 319                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 320                         return;
 321                     }
 322                     break;
 323
 324                 case "KEYW.WITH":
 325                     //println("<i>"+token.data+"</i>");
 326                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 327                         // Inside a 'with' block, it is impossible to figure out
 328                         // statically whether a symbol is a local variable or an
 329                         // object member. As a consequence, the only thing we can
 330                         // do is turn the obfuscation off for the highest scope
 331                         // containing the 'with' block.
 332                         this.protectScopeFromObfuscation(scope);
 333                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 334                     }
 335                     break;
 336
 337                 case "KEYW.CATCH":
 338                     //println("<i>"+token.data+"</i>");
 339                     this.parseCatch();
 340                     break;
 341                 /*
 342                 case Token.SPECIALCOMMENT:
 343                         if (mode == BUILDING_SYMBOL_TREE) {
 344                             protectScopeFromObfuscation(scope);
 345                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 346                         }
 347                         break;
 348                 */
 349
 350                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 351                 case "STRN.SINGLE_QUOTE":
 352                     //println("<i>"+token.data+"</i>");
 353                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 354                         // then we are in an object lit.. -> we need to flag the brace as such...
 355                         isObjectLitAr.pop();
 356                         isObjectLitAr.push(true);
 357                         //print(">>>>>> OBJLIT REPUSH(true)");
 358                     }
 359                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 360
 361                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 362                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 363                         // see if we can replace..
 364                         // remove the quotes..
 365                         // should do a bit more checking!!!! (what about wierd char's in the string..
 366                         var str = token.data.substring(1,token.data.length-1);
 367                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 368                             token.outData = str;
 369                         }
 370
 371
 372
 373                     }
 374
 375
 376
 377                     break;
 378
 379                 case "NAME.NAME":
 380
 381                     //print("DEAL WITH NAME:");
 382                     // got identifier..
 383
 384                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 385                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 386                         isObjectLitAr.pop();
 387                         isObjectLitAr.push(true);
 388                         //print(">>>>>> OBJLIT REPUSH(true)");
 389                         //println("<i>"+token.data+"</i>");
 390                         break;
 391                     }
 392                    // print("DEAL WITH obj lit:");
 393                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 394
 395                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 396                         // skip, it's an object lit key..
 397                         //println("<i>"+token.data+"</i>");
 398                         break;
 399                     }
 400
 401
 402                     // skip anyting with "." before it..!!
 403
 404                     if (this.ts.lookTok(-1).data == ".") {
 405                         // skip, it's an object prop.
 406                         //println("<i>"+token.data+"</i>");
 407                         break;
 408                     }
 409                     symbol = token.data;
 410                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 411
 412                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 413
 414                         //print ("MUNGE?" + symbol);
 415
 416                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 417
 418                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 419                         identifier = this.getIdentifier(symbol, scope);
 420
 421                         if (identifier == false) {
 422 // BUG!find out where builtin is defined...
 423                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 424                                 // Here, we found an undeclared and un-namespaced symbol that is
 425                                 // 3 characters or less in length. Declare it in the global scope.
 426                                 // We don't need to declare longer symbols since they won't cause
 427                                 // any conflict with other munged symbols.
 428                                 this.globalScope.declareIdentifier(symbol, token);
 429                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 430                             }
 431
 432                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 433                         } else {
 434                             token.identifier = identifier;
 435                             identifier.refcount++;
 436                         }
 437                     }
 438
 439                     break;
 440                     //println("<B>SID</B>");
 441                 default:
 442                     if (token.type != 'KEYW') {
 443                         break;
 444                     }
 445                    // print("Check eval:");
 446
 447                     symbol = token.data;
 448
 449                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 450
 451                         if (symbol == "eval") {
 452                             // look back one and see if we can find a comment!!!
 453                             if (this.ts.look(-1).type == "COMM") {
 454                                 // look for eval:var:noreplace\n
 455                                 var _t = this;
 456                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 457
 458                                     var hi = _t.getIdentifier(a, scope);
 459                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 460                                     if (hi) {
 461                                      //   println("PROTECT "+a+" from munge");
 462                                         hi.toMunge = false;
 463                                     }
 464
 465                                 });
 466
 467
 468                             } else {
 469
 470
 471                                 this.protectScopeFromObfuscation(scope);
 472                                 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);
 473                             }
 474
 475                         }
 476
 477                     }
 478                     break;
 479
 480
 481             } // end switch
 482
 483
 484             //this.timerPrint("parseScope TOK : " + token.toString());
 485             token = this.ts.nextTok();
 486             //if (this.ts.nextT()) break;
 487
 488         }
 489         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 490     },
 491
 492
 493     parseExpression : function() {
 494
 495         // Parse the expression until we encounter a comma or a semi-colon
 496         // in the same brace nesting, bracket nesting and paren nesting.
 497         // Parse functions if any...
 498         //println("<i>EXP</i><BR/>");
 499         !this.debug || print("PARSE EXPR");
 500
 501
 502         // for printing stuff..
 503
 504
 505
 506         var symbol;
 507         var token;
 508         var currentScope;
 509         var identifier;
 510
 511         var expressionBraceNesting = this.braceNesting;
 512         var bracketNesting = 0;
 513         var parensNesting = 0;
 514         var isInObjectLitAr;
 515         var isObjectLitAr = [ false ];
 516
 517         currentScope = this.scopes[this.scopes.length-1];
 518
 519         var scopeIndent = '';
 520         this.scopes.forEach(function() {
 521             scopeIndent += '   ';
 522         });
 523         print(scopeIndent + ">> ENTER EXPRESSION");
 524         while (token = this.ts.lookTok()) {
 525
 526
 527
 528            /*
 529             // moved out of loop?
 530            currentScope = this.scopes[this.scopes.length-1];
 531
 532             var scopeIndent = '';
 533             this.scopes.forEach(function() {
 534                 scopeIndent += '   ';
 535             });
 536            */
 537             print(scopeIndent + 'OBJLIT.len='+ isObjectLitAr.length + ' ' + token.data);
 538
 539             //println("<i>"+token.data+"</i>");
 540             //this.log("EXP:" + token.data);
 541             switch (token.type) {
 542                 case 'PUNC':
 543                     switch(token.data) {
 544
 545                         case ';':
 546                         case ',':
 547                             if (this.braceNesting == expressionBraceNesting &&
 548                                     bracketNesting == 0 &&
 549                                     parensNesting == 0) {
 550                                 print(scopeIndent + "<< EXIT EXPRESSION");
 551                                 return;
 552                             }
 553                             break;
 554
 555
 556
 557                         case '{': //Token.LC:
 558                             isObjectLitAr.push(false);
 559
 560                             this.braceNesting++;
 561                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 562                             break;
 563
 564                         case '}': //Token.RC:
 565                             this.braceNesting--;
 566                             isObjectLitAr.pop();
 567                             //print(">>>>> EXP POP" + this.braceNesting);
 568                            // assert braceNesting >= expressionBraceNesting;
 569                             break;
 570
 571                         case '[': //Token.LB:
 572                             bracketNesting++;
 573                             break;
 574
 575                         case ']': //Token.RB:
 576                             bracketNesting--;
 577                             break;
 578
 579                         case '(': //Token.LP:
 580                             parensNesting++;
 581                             break;
 582
 583                         case ')': //Token.RP:
 584                             parensNesting--;
 585                             break;
 586                     }
 587                     break;
 588
 589                 case 'STRN': // used for object lit detection..
 590                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 591                         // then we are in an object lit.. -> we need to flag the brace as such...
 592                         isObjectLitAr.pop();
 593                         isObjectLitAr.push(true);
 594                         //print(">>>>> EXP PUSH(true)");
 595                     }
 596
 597
 598
 599                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 600                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 601                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 602                         // see if we can replace..
 603                         // remove the quotes..
 604                         var str = token.data.substring(1,token.data.length-1);
 605                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 606                             token.outData = str;
 607                         }
 608
 609
 610
 611                     }
 612
 613                     break;
 614
 615
 616
 617                 case 'NAME':
 618
 619                     symbol = token.data;
 620                     //print("in NAME = " + token.toString());
 621                     //print("in NAME 0: " + this.ts.look(0).toString());
 622                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 623                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 624                         // then we are in an object lit.. -> we need to flag the brace as such...
 625                         isObjectLitAr.pop();
 626                         isObjectLitAr.push(true);
 627                          //print(">>>>> EXP  PUSH(true)");
 628                         break;
 629                     }
 630
 631                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 632                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 633
 634                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 635                         break;
 636                     }
 637                     //print(this.ts.lookTok(0).data);
 638                     if (this.ts.lookTok(0).data == ".") {
 639                         //skip '.'
 640                         break;
 641                     }
 642
 643                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 644
 645                         identifier = this.getIdentifier(symbol, currentScope);
 646                         //println("<B>??</B>");
 647                         if (identifier == false) {
 648
 649                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 650                                 // Here, we found an undeclared and un-namespaced symbol that is
 651                                 // 3 characters or less in length. Declare it in the global scope.
 652                                 // We don't need to declare longer symbols since they won't cause
 653                                 // any conflict with other munged symbols.
 654                                 this.globalScope.declareIdentifier(symbol, token);
 655                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 656                             } else {
 657                                 //println("undeclared")
 658                             }
 659
 660
 661                         } else {
 662                             //println("<B>++</B>");
 663                             token.identifier = identifier;
 664                             identifier.refcount++;
 665                         }
 666
 667                     }
 668                     break;
 669
 670
 671
 672
 673                     //println("<B>EID</B>");
 674                  case 'KEYW':
 675
 676                     if (token.name == "FUNCTION") {
 677
 678                         this.parseFunctionDeclaration();
 679                         break;
 680                     }
 681
 682
 683
 684                     symbol = token.data;
 685                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 686
 687                         if (symbol == "eval") {
 688                             if (this.ts.look(-1).type == 'COMM') {
 689                                 // look for eval:var:noreplace\n
 690                                 var _t = this;
 691                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 692                                     var hi = _t.getIdentifier(a, currentScope);
 693                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 694                                     if (hi) {
 695                                       //  println("PROTECT "+a+" from munge");
 696                                         hi.toMunge = false;
 697                                     }
 698
 699
 700                                 });
 701
 702                             } else {
 703                                 this.protectScopeFromObfuscation(currentScope);
 704                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 705                             }
 706
 707
 708                         }
 709                         break;
 710                     }
 711
 712             }
 713             if (!this.ts.nextTok()) break;
 714         }
 715         print(scopeIndent + "<< EXIT EXPRESSION");
 716     },
 717
 718
 719     parseCatch : function() {
 720
 721         var symbol;
 722         var token;
 723         var currentScope;
 724         var identifier;
 725
 726         //token = getToken(-1);
 727         //assert token.getType() == Token.CATCH;
 728         token = this.ts.nextTok();
 729         //assert token.getType() == Token.LP; (
 730         token = this.ts.nextTok();
 731         //assert token.getType() == Token.NAME;
 732
 733         symbol = token.data;
 734         currentScope = this.scopes[this.scopes.length-1];
 735
 736         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 737             // We must declare the exception identifier in the containing function
 738             // scope to avoid errors related to the obfuscation process. No need to
 739             // display a warning if the symbol was already declared here...
 740             currentScope.declareIdentifier(symbol, token);
 741         } else {
 742             //?? why inc the refcount?? - that should be set when building the tree???
 743             identifier = this.getIdentifier(symbol, currentScope);
 744             identifier.refcount++;
 745         }
 746
 747         token = this.ts.nextTok();
 748         //assert token.getType() == Token.RP; // )
 749     },
 750
 751     parseFunctionDeclaration : function()
 752     {
 753        // print("PARSE FUNCTION");
 754         var symbol;
 755         var token;
 756         var currentScope  = false;
 757         var fnScope = false;
 758         var identifier;
 759         //this.logR("<B>PARSING FUNCTION</B>");
 760         currentScope = this.scopes[this.scopes.length-1];
 761
 762         token = this.ts.nextTok();
 763         if (token.type == "NAME") {
 764             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 765                 // Get the name of the function and declare it in the current scope.
 766                 symbol = token.data;
 767                 if (currentScope.getIdentifier(symbol) != false) {
 768                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 769                 }
 770                 currentScope.declareIdentifier(symbol,token);
 771             }
 772             token =  this.ts.nextTok();
 773         }
 774
 775         //assert token.getType() == Token.LP;
 776         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 777             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 778
 779             //println("STORING SCOPE" + this.ts.cursor);
 780
 781             this.indexedScopes[this.ts.cursor] = fnScope;
 782
 783         } else {
 784             //qln("FETCHING SCOPE" + this.ts.cursor);
 785             fnScope = this.indexedScopes[this.ts.cursor];
 786
 787         }
 788
 789         // Parse function arguments.
 790         var argpos = 0;
 791         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 792             token = this.ts.nextTok();
 793            // print ("FUNC ARGS: " + token.toString())
 794             //assert token.getType() == Token.NAME ||
 795             //        token.getType() == Token.COMMA;
 796             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 797                 symbol = token.data;
 798                 identifier = fnScope.declareIdentifier(symbol,token);
 799                 if (symbol == "$super" && argpos == 0) {
 800                     // Exception for Prototype 1.6...
 801                     identifier.preventMunging();
 802                 }
 803                 argpos++;
 804             }
 805         }
 806
 807         token = this.ts.nextTok();
 808         // assert token.getType() == Token.LC;
 809         this.braceNesting++;
 810
 811         token = this.ts.nextTok();
 812         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 813             /*
 814
 815             NOT SUPPORTED YET!?!!?!
 816
 817             // This is a hint. Hints are empty statements that look like
 818             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 819             // to prevent specific symbols from getting obfuscated (some heretic
 820             // implementations, such as Prototype 1.6, require specific variable
 821             // names, such as $super for example, in order to work appropriately.
 822             // Note: right now, only "nomunge" is supported in the right hand side
 823             // of a hint. However, in the future, the right hand side may contain
 824             // other values.
 825             consumeToken();
 826             String hints = token.getValue();
 827             // Remove the leading and trailing quotes...
 828             hints = hints.substring(1, hints.length() - 1).trim();
 829             StringTokenizer st1 = new StringTokenizer(hints, ",");
 830             while (st1.hasMoreTokens()) {
 831                 String hint = st1.nextToken();
 832                 int idx = hint.indexOf(':');
 833                 if (idx <= 0 || idx >= hint.length() - 1) {
 834                     if (mode == BUILDING_SYMBOL_TREE) {
 835                         // No need to report the error twice, hence the test...
 836                         this.warn("Invalid hint syntax: " + hint, true);
 837                     }
 838                     break;
 839                 }
 840                 String variableName = hint.substring(0, idx).trim();
 841                 String variableType = hint.substring(idx + 1).trim();
 842                 if (mode == BUILDING_SYMBOL_TREE) {
 843                     fnScope.addHint(variableName, variableType);
 844                 } else if (mode == CHECKING_SYMBOL_TREE) {
 845                     identifier = fnScope.getIdentifier(variableName);
 846                     if (identifier != null) {
 847                         if (variableType.equals("nomunge")) {
 848                             identifier.preventMunging();
 849                         } else {
 850                             this.warn("Unsupported hint value: " + hint, true);
 851                         }
 852                     } else {
 853                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 854                     }
 855                 }
 856             }
 857             */
 858         }
 859
 860         this.parseScope(fnScope);
 861         // now pop it off the stack!!!
 862
 863
 864
 865     },
 866
 867     protectScopeFromObfuscation : function(scope) {
 868             //assert scope != null;
 869
 870         if (scope == this.globalScope) {
 871             // The global scope does not get obfuscated,
 872             // so we don't need to worry about it...
 873             return;
 874         }
 875
 876         // Find the highest local scope containing the specified scope.
 877         while (scope && scope.parent != this.globalScope) {
 878             scope = scope.parent;
 879         }
 880
 881         //assert scope.getParentScope() == globalScope;
 882         scope.preventMunging();
 883     },
 884
 885     getIdentifier: function(symbol, scope) {
 886         var identifier;
 887         while (scope != false) {
 888             identifier = scope.getIdentifier(symbol);
 889             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 890             if (identifier) {
 891                 return identifier;
 892             }
 893             scope = scope.parent;
 894         }
 895         return false;
 896     }
 897 };