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

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