git.roojs.org Git - app.jsdoc/blob - JSDOC/ScopeParser.js

   1 //<Script type="text/javascript">
   2
   3 Scope = imports.Scope.Scope;
   4 TokenStream = imports.TokenStream.TokenStream;
   5 /**
   6 * This code now uses the collapsed tree
   7 * Used by packer to determine scope
   8 *
   9 * @class ScopeParser
  10 * @scope JSDOC
  11 *
  12 *
  13 */
  14
  15 ScopeParser = function(ts) {
  16     this.ts = ts; // {TokenStream}
  17     this.warnings = [];
  18     this.indexedg = {};
  19     this.timer = new Date() * 1;
  20     this.debug = false;
  21 }
  22 /**
  23  * @type {Ident}
  24  * @static
  25  * list of keywords that should not be used in object literals.
  26  *
  27  */
  28 ScopeParser.idents = [
  29         "break",
  30         "case",
  31         "continue",
  32         "default",
  33         "delete",
  34         "do",
  35         "else",
  36         "export",
  37         "false",
  38         "for",
  39         "function",
  40         "if",
  41         "import",
  42         "in",
  43         "new",
  44         "null",
  45         "return",
  46         "switch",
  47         "this",
  48         "true",
  49         "typeof",
  50         "var",
  51         "void",
  52         "while",
  53         "with",
  54
  55         "catch",
  56         "class",
  57         "const",
  58         "debugger",
  59         "enum",
  60         "extends",
  61         "finally",
  62         "super",
  63         "throw",
  64         "try",
  65
  66         "abstract",
  67         "boolean",
  68         "byte",
  69         "char",
  70         "double",
  71         "final",
  72         "float",
  73         "goto",
  74         "implements",
  75         "instanceof",
  76         "int",
  77         "interface",
  78         "long",
  79         "native",
  80         "package",
  81         "private",
  82         "protected",
  83         "public",
  84         "short",
  85         "static",
  86         "synchronized",
  87         "throws",
  88         "transient",
  89                 "include",
  90                 "undefined"
  91 ];
  92
  93
  94 ScopeParser.prototype = {
  95     timer: 0,
  96     timerPrint: function (str) {
  97         var ntime = new Date() * 1;
  98         var tdif =  ntime -this.timer;
  99         this.timer = ntime;
 100         var pref = '';
 101         if (tdif > 100) { //slower ones..
 102             pref = '***';
 103         }
 104         println(pref+'['+tdif+']'+str);
 105
 106     },
 107     warn: function(s) {
 108         //print('****************' + s);
 109         this.warnings.push(s);
 110         //println("WARNING:" + htmlescape(s) + "<BR>");
 111     },
 112     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 113     warnings : false,
 114     ts : false,
 115     global : false,
 116     mode : "", //"BUILDING_SYMBOL_TREE",
 117     braceNesting : 0,
 118     indexedScopes : false,
 119     munge: true,
 120
 121
 122
 123
 124
 125     buildSymbolTree : function()
 126     {
 127         //println("<PRE>");
 128
 129         this.ts.rewind();
 130         this.braceNesting = 0;
 131
 132        // print(JSON.stringify(this.ts.tokens, null,4));
 133
 134
 135         this.globalScope = new  Scope(-1, false, -1, '');
 136         this.indexedScopes = { 0 : this.globalScope };
 137
 138         this.mode = 'BUILDING_SYMBOL_TREE';
 139         this.parseScope(this.globalScope);
 140
 141         //print("---------------END PASS 1 ---------------- ");
 142
 143     },
 144     mungeSymboltree : function()
 145     {
 146
 147         if (!this.munge) {
 148             return;
 149         }
 150
 151         // One problem with obfuscation resides in the use of undeclared
 152         // and un-namespaced global symbols that are 3 characters or less
 153         // in length. Here is an example:
 154         //
 155         //     var declaredGlobalVar;
 156         //
 157         //     function declaredGlobalFn() {
 158         //         var localvar;
 159         //         localvar = abc; // abc is an undeclared global symbol
 160         //     }
 161         //
 162         // In the example above, there is a slim chance that localvar may be
 163         // munged to 'abc', conflicting with the undeclared global symbol
 164         // abc, creating a potential bug. The following code detects such
 165         // global symbols. This must be done AFTER the entire file has been
 166         // parsed, and BEFORE munging the symbol tree. Note that declaring
 167         // extra symbols in the global scope won't hurt.
 168         //
 169         // Note: Since we go through all the tokens to do this, we also use
 170         // the opportunity to count how many times each identifier is used.
 171
 172         this.ts.rewind();
 173         this.braceNesting = 0;
 174         this.mode = 'PASS2_SYMBOL_TREE';
 175
 176         //println("MUNGING?");
 177
 178         this.parseScope(this.globalScope);
 179
 180         //this.globalScope.dump();
 181
 182
 183         this.globalScope.munge();
 184     },
 185
 186
 187     log : function(str)
 188     {
 189         print ("                    ".substring(0, this.braceNesting*2) + str);
 190
 191         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 192     },
 193     logR : function(str)
 194     {
 195             //println("<B>LOG:</B>" + str + "<BR/>");
 196     },
 197
 198
 199
 200
 201
 202     parseScope : function(scope) // parse a token stream..
 203     {
 204         //this.timerPrint("parseScope EnterScope");
 205         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 206         var symbol;
 207         var token;
 208
 209         var identifier;
 210
 211         var expressionBraceNesting = this.braceNesting + 0;
 212
 213         var parensNesting = 0;
 214
 215         var isObjectLitAr = [ false ];
 216         var isInObjectLitAr;
 217
 218
 219         //var scopeIndent = '';
 220         //this.scopes.forEach(function() {
 221         //    scopeIndent += '   ';
 222         //});
 223         //print(">> ENTER SCOPE");
 224
 225
 226
 227
 228         token = this.ts.lookTok(1);
 229         while (token) {
 230           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 231             //this.dumpToken(token , this.scopes, this.braceNesting);
 232             //print('SCOPE:' + token.toString());
 233             //this.log(token.data);
 234             if (token.type == 'NAME') {
 235             //    print('*' + token.data);
 236             }
 237             switch(token.type + '.' + token.name) {
 238                 case "KEYW.VAR":
 239                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 240                     //print('SCOPE-VAR:' + token.toString());
 241                     var vstart = this.ts.cursor +1;
 242
 243                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 244                     while (true) {
 245                         token = this.ts.nextTok();
 246                         //!this.debug|| print( token.toString());
 247                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 248                         if (!token) { // can return false at EOF!
 249                             break;
 250                         }
 251                         if (token.name == "VAR" || token.data == ',') { // kludge..
 252                             continue;
 253                         }
 254                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 255                         if (token.type != "NAME") {
 256                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 257                                 print(this.ts.tokens[i].toString());
 258                             }
 259
 260                             print( "var without ident");
 261                             Seed.quit()
 262                         }
 263
 264
 265                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 266                             identifier = scope.getIdentifier(token.data,token) ;
 267
 268                             if (identifier == false) {
 269                                 scope.declareIdentifier(token.data, token);
 270                             } else {
 271                                 token.identifier = identifier;
 272                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 273                             }
 274                         }
 275
 276                         token = this.ts.nextTok();
 277                         !this.debug|| print(token.toString());
 278                         /*
 279                         assert token.getType() == Token.SEMI ||
 280                                 token.getType() == Token.ASSIGN ||
 281                                 token.getType() == Token.COMMA ||
 282                                 token.getType() == Token.IN;
 283                         */
 284                         if (token.name == "IN") {
 285                             break;
 286                         } else {
 287                             //var bn = this.braceNesting;
 288                             var bn = this.braceNesting;
 289                             var nts = [];
 290                             while (true) {
 291                                 if (!token || token.type == 'VOID' || token.data == ',') {
 292                                     break;
 293                                 }
 294                                 nts.push(token);
 295                                 token = this.ts.nextTok();
 296                             }
 297                             if (nts.length) {
 298                                 var TS = this.ts;
 299                                 this.ts = new TokenStream(nts);
 300                                 this.parseExpression(scope);
 301                                 this.ts = TS;
 302                             }
 303
 304                             this.braceNesting = bn;
 305                             //this.braceNesting = bn;
 306                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 307
 308                             token = this.ts.lookTok(1);
 309                             //!this.debug||
 310                            // print("AFTER EXP: " + token.toString());
 311                             if (token.data == ';') {
 312                                 break;
 313                             }
 314                         }
 315                     }
 316
 317                     //print("VAR:")
 318                     //this.ts.dump(vstart , this.ts.cursor);
 319
 320                     break;
 321
 322
 323                 case "KEYW.FUNCTION":
 324                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 325                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 326                     //println("<i>"+token.data+"</i>");
 327                      var bn = this.braceNesting;
 328                     this.parseFunctionDeclaration(scope);
 329                      this.braceNesting = bn;
 330                     break;
 331
 332                 case "PUNC.LEFT_CURLY": // {
 333                 case "PUNC.LEFT_PAREN": // (
 334                 case "PUNC.LEFT_BRACE": // [
 335                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 336                     //println("<i>"+token.data+"</i>");
 337                     var curTS = this.ts;
 338                     if (token.props) {
 339
 340                         for (var prop in token.props) {
 341
 342
 343                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 344                             if (token.props[prop].val[0].data == 'function') {
 345                                 // parse a function..
 346                                 this.ts = new TokenStream(token.props[prop].val);
 347                                 this.ts.nextTok();
 348                                 this.parseFunctionDeclaration(scope);
 349
 350                                 continue;
 351                             }
 352                             // key value..
 353
 354                             this.ts = new TokenStream(token.props[prop].val);
 355                             this.parseExpression(scope);
 356
 357                         }
 358                         this.ts = curTS;
 359
 360                         // it's an object literal..
 361                         // the values could be replaced..
 362                         break;
 363                     }
 364
 365
 366                     var _this = this;
 367                     token.items.forEach(function(expr) {
 368                            //print(JSON.stringify(expr, null,4));
 369                            _this.ts = new TokenStream(expr);
 370                             //if (curTS.data == '(') {
 371                                 _this.parseScope(scope)
 372                             //} else {
 373                               //  _this.parseExpression(scope)
 374                             //}
 375
 376                     });
 377                     this.ts = curTS;
 378                     //print("NOT PROPS"); Seed.quit();
 379
 380                     //isObjectLitAr.push(false);
 381                     //this.braceNesting++;
 382
 383                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 384                     break;
 385
 386                 case "PUNC.RIGHT_CURLY": // }
 387                     //print("<< EXIT SCOPE");
 388                     return;
 389
 390                 case "KEYW.WITH":
 391                     //print('SCOPE-WITH:' + token.toString());
 392                     //println("<i>"+token.data+"</i>");
 393                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 394                         // Inside a 'with' block, it is impossible to figure out
 395                         // statically whether a symbol is a local variable or an
 396                         // object member. As a consequence, the only thing we can
 397                         // do is turn the obfuscation off for the highest scope
 398                         // containing the 'with' block.
 399                         this.protectScopeFromObfuscation(scope);
 400                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 401                     }
 402                     break;
 403
 404                 case "KEYW.CATCH":
 405                     //print('SCOPE-CATCH:' + token.toString());
 406                     //println("<i>"+token.data+"</i>");
 407                     this.parseCatch(scope);
 408                     break;
 409
 410                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 411                 case "STRN.SINGLE_QUOTE":
 412                   //  print('SCOPE-STRING:' + token.toString());
 413                     //println("<i>"+token.data+"</i>");
 414
 415                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 416                         // then we are in an object lit.. -> we need to flag the brace as such...
 417                         isObjectLitAr.pop();
 418                         isObjectLitAr.push(true);
 419                         //print(">>>>>> OBJLIT REPUSH(true)");
 420                     }
 421                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 422
 423                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 424                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 425                         // see if we can replace..
 426                         // remove the quotes..
 427                         // should do a bit more checking!!!! (what about wierd char's in the string..
 428                         var str = token.data.substring(1,token.data.length-1);
 429                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 430                             token.outData = str;
 431                         }
 432
 433
 434
 435                     }
 436
 437                     break;
 438
 439                 case "NAME.NAME":
 440                     //print('SCOPE-NAME:' + token.toString());
 441                     //print("DEAL WITH NAME:");
 442                     // got identifier..
 443                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 444                     // skip anyting with "." before it..!!
 445
 446                     if (this.ts.lookTok(-1).data == ".") {
 447                         // skip, it's an object prop.
 448                         //println("<i>"+token.data+"</i>");
 449                         break;
 450                     }
 451                     //print("SYMBOL: " + token.toString());
 452
 453                     symbol = token.data;
 454                     if (symbol == 'this') {
 455                         break;
 456                     }
 457                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 458
 459                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 460
 461                         //print ("MUNGE?" + symbol);
 462
 463                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 464
 465                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 466                         identifier = this.getIdentifier(symbol, scope, token);
 467
 468                         if (identifier == false) {
 469 // BUG!find out where builtin is defined...
 470                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 471                                 // Here, we found an undeclared and un-namespaced symbol that is
 472                                 // 3 characters or less in length. Declare it in the global scope.
 473                                 // We don't need to declare longer symbols since they won't cause
 474                                 // any conflict with other munged symbols.
 475                                 this.globalScope.declareIdentifier(symbol, token);
 476                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 477                             }
 478
 479                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 480                         } else {
 481                             token.identifier = identifier;
 482                             identifier.refcount++;
 483                         }
 484                     }
 485
 486                     break;
 487                     //println("<B>SID</B>");
 488                 default:
 489                     if (token.type != 'KEYW') {
 490                         break;
 491                     }
 492                     //print('SCOPE-KEYW:' + token.toString());
 493                    // print("Check eval:");
 494
 495                     symbol = token.data;
 496
 497                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 498
 499                         if (token.name == "EVAL") {
 500
 501                             //print(JSON.stringify(token, null,4));
 502                             // look back one and see if we can find a comment!!!
 503                             //if (this.ts.look(-1).type == "COMM") {
 504                             if (token.prefix && token.prefix.match(/eval/)) {
 505                                 // look for eval:var:noreplace\n
 506                                 //print("MATCH!?");
 507                                 var _t = this;
 508                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 509                                     //print("GOT: " + a);
 510                                     var hi = _t.getIdentifier(a, scope, token);
 511                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 512                                     if (hi) {
 513                                       //  print("PROTECT "+a+" from munge");
 514                                         //print(JSON.stringify(hi,null,4));
 515                                         hi.toMunge = false;
 516                                     }
 517
 518                                 });
 519
 520
 521                             } else {
 522
 523
 524                                 this.protectScopeFromObfuscation(scope);
 525                                 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);
 526                             }
 527
 528                         }
 529
 530                     }
 531                     break;
 532
 533
 534             } // end switch
 535
 536
 537             //print("parseScope TOK : " + token.toString());
 538             token = this.ts.nextTok();
 539             //if (this.ts.nextT()) break;
 540
 541         }
 542         //print("<<< EXIT SCOPE");
 543         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 544     },
 545
 546     expN : 0,
 547     parseExpression : function(scope) {
 548
 549         // Parse the expression until we encounter a comma or a semi-colon
 550         // in the same brace nesting, bracket nesting and paren nesting.
 551         // Parse functions if any...
 552         //println("<i>EXP</i><BR/>");
 553         !this.debug || print("PARSE EXPR");
 554         this.expN++;
 555
 556         // for printing stuff..
 557
 558
 559
 560         var symbol;
 561         var token;
 562
 563         var identifier;
 564
 565         var expressionBraceNesting = this.braceNesting + 0;
 566         var bracketNesting = 0;
 567         var parensNesting = 0;
 568         var isInObjectLitAr;
 569         var isObjectLitAr = [ false ];
 570
 571
 572
 573
 574         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 575         while (token = this.ts.nextTok()) {
 576
 577
 578
 579            /*
 580             // moved out of loop?
 581            currentScope = this.scopes[this.scopes.length-1];
 582
 583             var scopeIndent = '';
 584             this.scopes.forEach(function() {
 585                 scopeIndent += '   ';
 586             });
 587            */
 588
 589            //this.dumpToken(token,  this.scopes, this.braceNesting );
 590             //print('EXPR' +  token.toString());
 591
 592
 593             //println("<i>"+token.data+"</i>");
 594             //this.log("EXP:" + token.data);
 595             switch (token.type) {
 596                 case 'PUNC':
 597                     //print("EXPR-PUNC:" + token.toString());
 598
 599                     switch(token.data) {
 600
 601                         case ';':
 602                             //print("<< EXIT EXPRESSION");
 603                             break;
 604
 605                         case ',':
 606
 607                             break;
 608
 609
 610                         case '(': //Token.LP:
 611                         case '{': //Token.LC:
 612                         case '[': //Token.LB:
 613                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 614                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 615                             //println("<i>"+token.data+"</i>");
 616                             var curTS = this.ts;
 617                             if (token.props) {
 618
 619                                 for (var prop in token.props) {
 620                                     //if (!token.props[prop].val.length) {
 621                                         //print(JSON.stringify(token.props, null,4));
 622                                     //}
 623
 624                                     if (token.props[prop].val[0].data == 'function') {
 625                                         // parse a function..
 626                                         this.ts = new TokenStream(token.props[prop].val);
 627                                         this.ts.nextTok();
 628                                         this.parseFunctionDeclaration(scope);
 629                                         continue;
 630                                     }
 631                                     // key value..
 632
 633                                     this.ts = new TokenStream(token.props[prop].val);
 634                                     this.parseExpression(scope);
 635
 636                                 }
 637                                 this.ts = curTS;
 638
 639                                 // it's an object literal..
 640                                 // the values could be replaced..
 641                                 break;
 642                             }
 643
 644
 645                             var _this = this;
 646                             token.items.forEach(function(expr) {
 647                                   _this.ts = new TokenStream(expr);
 648                                   _this.parseExpression(scope)
 649                             });
 650                             this.ts = curTS;
 651
 652
 653
 654                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 655                             break;
 656
 657
 658
 659
 660
 661                         case ')': //Token.RP:
 662                         case ']': //Token.RB:
 663                         case '}': //Token.RB:
 664                             //print("<< EXIT EXPRESSION");
 665                             return;
 666
 667
 668
 669                             parensNesting++;
 670                             break;
 671
 672
 673
 674                     }
 675                     break;
 676
 677                 case 'STRN': // used for object lit detection..
 678                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 679                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 680
 681
 682                     break;
 683
 684
 685
 686                 case 'NAME':
 687                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 688
 689                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 690                     } else {
 691                         //print("EXPR-NAME:" + token.toString());
 692                     }
 693                     symbol = token.data;
 694                     //print("in NAME = " + token.toString());
 695                     //print("in NAME 0: " + this.ts.look(0).toString());
 696                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 697
 698                     //print(this.ts.lookTok(-1).data);
 699                     // prefixed with '.'
 700                     if (this.ts.lookTok(-1).data == ".") {
 701                         //skip '.'
 702                         break;
 703                     }
 704                     if (symbol == 'this') {
 705                         break;
 706                        }
 707
 708                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 709
 710                         identifier = this.getIdentifier(symbol, scope, token);
 711                         //println("<B>??</B>");
 712                         if (identifier == false) {
 713
 714                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 715                                 // Here, we found an undeclared and un-namespaced symbol that is
 716                                 // 3 characters or less in length. Declare it in the global scope.
 717                                 // We don't need to declare longer symbols since they won't cause
 718                                 // any conflict with other munged symbols.
 719                                 this.globalScope.declareIdentifier(symbol, token);
 720                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 721                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 722                                 //throw "OOPS";
 723                             } else {
 724                                 //print("undeclared:" + token.toString())
 725                             }
 726
 727
 728                         } else {
 729                             //println("<B>++</B>");
 730                             token.identifier = identifier;
 731                             identifier.refcount++;
 732                         }
 733
 734                     }
 735                     break;
 736
 737
 738
 739
 740                     //println("<B>EID</B>");
 741                 case 'KEYW':
 742                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 743                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 744
 745                     //print('EXPR-KEYW:' + token.toString());
 746                     if (token.name == "FUNCTION") {
 747
 748                         this.parseFunctionDeclaration(scope);
 749                         break;
 750                     }
 751
 752
 753                     symbol = token.data;
 754                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 755
 756                         if (token.name == "EVAL") {
 757                             //print(JSON.stringify(token,null,4));
 758                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 759                                 // look for eval:var:noreplace\n
 760                                // print("GOT MATCH?");
 761                                 var _t = this;
 762                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 763
 764                                     //print("PROTECT: " + a);
 765
 766
 767                                     var hi = _t.getIdentifier(a, scope, token);
 768                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 769                                     if (hi) {
 770                                       //  println("PROTECT "+a+" from munge");
 771                                         hi.toMunge = false;
 772                                     }
 773
 774
 775                                 });
 776
 777                             } else {
 778                                 this.protectScopeFromObfuscation(scope);
 779                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 780                             }
 781
 782
 783                         }
 784                         break;
 785                     }
 786                 default:
 787                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 788                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 789                     break;
 790             }
 791
 792         }
 793         //print("<< EXIT EXPRESSION");
 794         this.expN--;
 795     },
 796
 797
 798     parseCatch : function(scope) {
 799
 800         var symbol;
 801         var token;
 802         var scope;
 803         var identifier;
 804
 805         //token = getToken(-1);
 806         //assert token.getType() == Token.CATCH;
 807         token = this.ts.nextTok(1);
 808         token = this.ts.nextTok(1);
 809
 810
 811         //print(JSON.stringify(this.ts,null,4));
 812         //assert token.getType() == Token.LP; (
 813         //token = this.ts.nextTok();
 814         //assert token.getType() == Token.NAME;
 815
 816         symbol = token.items[0][0].data;
 817
 818
 819         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 820             // We must declare the exception identifier in the containing function
 821             // scope to avoid errors related to the obfuscation process. No need to
 822             // display a warning if the symbol was already declared here...
 823             scope.declareIdentifier(symbol, token.items[0][0]);
 824         } else {
 825             //?? why inc the refcount?? - that should be set when building the tree???
 826             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 827             identifier.refcount++;
 828         }
 829
 830         token = this.ts.nextTok();
 831         //assert token.getType() == Token.RP; // )
 832     },
 833
 834     parseFunctionDeclaration : function(scope)
 835     {
 836         //print("PARSE FUNCTION");
 837         var symbol;
 838         var token;
 839
 840         var fnScope = false;
 841         var identifier;
 842         var b4braceNesting = this.braceNesting + 0;
 843
 844         //this.logR("<B>PARSING FUNCTION</B>");
 845
 846
 847         token = this.ts.nextTok();
 848         if (token.type == "NAME") {
 849             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 850                 // Get the name of the function and declare it in the current scope.
 851                 symbol = token.data;
 852                 if (scope.getIdentifier(symbol,token) != false) {
 853                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 854                 }
 855                 scope.declareIdentifier(symbol,token);
 856             }
 857             token =  this.ts.nextTok();
 858         }
 859
 860
 861         // return function() {....
 862         while (token.data != "(") {
 863             //print(token.toString());
 864             token =  this.ts.nextTok();
 865
 866
 867
 868         }
 869
 870
 871         //assert token.getType() == Token.LP;
 872         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 873             fnScope = new Scope(1, scope, token.n, '', token);
 874
 875             //println("STORING SCOPE" + this.ts.cursor);
 876
 877             this.indexedScopes[token.id] = fnScope;
 878
 879         } else {
 880             //qln("FETCHING SCOPE" + this.ts.cursor);
 881             fnScope = this.indexedScopes[token.id];
 882         }
 883         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 884         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 885         // Parse function arguments.
 886         var args = token.items;
 887         for (var argpos =0; argpos < args.length; argpos++) {
 888
 889             token = args[argpos][0];
 890             //print ("FUNC ARGS: " + token.toString())
 891             //assert token.getType() == Token.NAME ||
 892             //        token.getType() == Token.COMMA;
 893             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 894                 symbol = token.data;
 895                 identifier = fnScope.declareIdentifier(symbol,token);
 896                 if (symbol == "$super" && argpos == 0) {
 897                     // Exception for Prototype 1.6...
 898                     identifier.preventMunging();
 899                 }
 900                 //argpos++;
 901             }
 902         }
 903
 904         token = this.ts.nextTok();
 905         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 906         //Seed.quit();
 907         //print(token.toString());
 908         // assert token.getType() == Token.LC;
 909         //this.braceNesting++;
 910
 911         //token = this.ts.nextTok();
 912         //print(token.toString());
 913         var outTS = this.ts;
 914         var _this = this;
 915         token.items.forEach(function(tar) {
 916             _this.ts = new TokenStream(tar);
 917             _this.parseScope(fnScope);
 918
 919
 920         });
 921
 922         //print(JSON.stringify(this.ts,null,4));
 923         //this.parseScope(fnScope);
 924         this.ts = outTS;
 925         // now pop it off the stack!!!
 926
 927         //this.braceNesting = b4braceNesting;
 928         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 929         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 930         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 931     },
 932
 933     protectScopeFromObfuscation : function(scope) {
 934             //assert scope != null;
 935
 936         if (scope == this.globalScope) {
 937             // The global scope does not get obfuscated,
 938             // so we don't need to worry about it...
 939             return;
 940         }
 941
 942         // Find the highest local scope containing the specified scope.
 943         while (scope && scope.parent != this.globalScope) {
 944             scope = scope.parent;
 945         }
 946
 947         //assert scope.getParentScope() == globalScope;
 948         scope.preventMunging();
 949     },
 950
 951     getIdentifier: function(symbol, scope, token) {
 952         var identifier;
 953         while (scope != false) {
 954             identifier = scope.getIdentifier(symbol, token);
 955             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 956             if (identifier) {
 957                 return identifier;
 958             }
 959             scope = scope.parent;
 960         }
 961         return false;
 962     }
 963 };