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|| print("AFTER EXP: " + token.toString());
 305                             if (token.data == ';') {
 306                                 break;
 307                             }
 308                         }
 309                     }
 310
 311                     //print("VAR:")
 312                     //this.ts.dump(vstart , this.ts.cursor);
 313
 314                     break;
 315
 316
 317                 case "KEYW.FUNCTION":
 318                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 319                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 320                     //println("<i>"+token.data+"</i>");
 321                      var bn = this.braceNesting;
 322                     this.parseFunctionDeclaration(scope);
 323                      this.braceNesting = bn;
 324                     break;
 325
 326                 case "PUNC.LEFT_CURLY": // {
 327                 case "PUNC.LEFT_PAREN": // (
 328                 case "PUNC.LEFT_BRACE": // [
 329                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 330                     //println("<i>"+token.data+"</i>");
 331                     var curTS = this.ts;
 332                     if (token.props) {
 333
 334                         for (var prop in token.props) {
 335
 336
 337                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 338                             if (token.props[prop].val[0].data == 'function') {
 339                                 // parse a function..
 340                                 this.ts = new TokenStream(token.props[prop].val);
 341                                 this.ts.nextTok();
 342                                 this.parseFunctionDeclaration(scope);
 343
 344                                 continue;
 345                             }
 346                             // key value..
 347
 348                             this.ts = new TokenStream(token.props[prop].val);
 349                             this.parseExpression(scope);
 350
 351                         }
 352                         this.ts = curTS;
 353
 354                         // it's an object literal..
 355                         // the values could be replaced..
 356                         break;
 357                     }
 358
 359
 360                     var _this = this;
 361                     token.items.forEach(function(expr) {
 362                           _this.ts = new TokenStream(expr);
 363                           _this.parseExpression(scope)
 364                     });
 365                     this.ts = curTS;
 366                     //print("NOT PROPS"); Seed.quit();
 367
 368                     //isObjectLitAr.push(false);
 369                     //this.braceNesting++;
 370
 371                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 372                     break;
 373
 374                 case "PUNC.RIGHT_CURLY": // }
 375                     //print("<< EXIT SCOPE");
 376                     return;
 377
 378                 case "KEYW.WITH":
 379                     //print('SCOPE-WITH:' + token.toString());
 380                     //println("<i>"+token.data+"</i>");
 381                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 382                         // Inside a 'with' block, it is impossible to figure out
 383                         // statically whether a symbol is a local variable or an
 384                         // object member. As a consequence, the only thing we can
 385                         // do is turn the obfuscation off for the highest scope
 386                         // containing the 'with' block.
 387                         this.protectScopeFromObfuscation(scope);
 388                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 389                     }
 390                     break;
 391
 392                 case "KEYW.CATCH":
 393                     //print('SCOPE-CATCH:' + token.toString());
 394                     //println("<i>"+token.data+"</i>");
 395                     this.parseCatch(scope);
 396                     break;
 397
 398                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 399                 case "STRN.SINGLE_QUOTE":
 400                   //  print('SCOPE-STRING:' + token.toString());
 401                     //println("<i>"+token.data+"</i>");
 402
 403                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 404                         // then we are in an object lit.. -> we need to flag the brace as such...
 405                         isObjectLitAr.pop();
 406                         isObjectLitAr.push(true);
 407                         //print(">>>>>> OBJLIT REPUSH(true)");
 408                     }
 409                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 410
 411                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 412                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 413                         // see if we can replace..
 414                         // remove the quotes..
 415                         // should do a bit more checking!!!! (what about wierd char's in the string..
 416                         var str = token.data.substring(1,token.data.length-1);
 417                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 418                             token.outData = str;
 419                         }
 420
 421
 422
 423                     }
 424
 425                     break;
 426
 427                 case "NAME.NAME":
 428                     //print('SCOPE-NAME:' + token.toString());
 429                     //print("DEAL WITH NAME:");
 430                     // got identifier..
 431                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 432                     // skip anyting with "." before it..!!
 433
 434                     if (this.ts.lookTok(-1).data == ".") {
 435                         // skip, it's an object prop.
 436                         //println("<i>"+token.data+"</i>");
 437                         break;
 438                     }
 439                     //print("SYMBOL: " + token.toString());
 440
 441                     symbol = token.data;
 442                     if (symbol == 'this') {
 443                         break;
 444                     }
 445                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 446
 447                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 448
 449                         //print ("MUNGE?" + symbol);
 450
 451                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 452
 453                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 454                         identifier = this.getIdentifier(symbol, scope, token);
 455
 456                         if (identifier == false) {
 457 // BUG!find out where builtin is defined...
 458                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 459                                 // Here, we found an undeclared and un-namespaced symbol that is
 460                                 // 3 characters or less in length. Declare it in the global scope.
 461                                 // We don't need to declare longer symbols since they won't cause
 462                                 // any conflict with other munged symbols.
 463                                 this.globalScope.declareIdentifier(symbol, token);
 464                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 465                             }
 466
 467                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 468                         } else {
 469                             token.identifier = identifier;
 470                             identifier.refcount++;
 471                         }
 472                     }
 473
 474                     break;
 475                     //println("<B>SID</B>");
 476                 default:
 477                     if (token.type != 'KEYW') {
 478                         break;
 479                     }
 480                     //print('SCOPE-KEYW:' + token.toString());
 481                    // print("Check eval:");
 482
 483                     symbol = token.data;
 484
 485                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 486
 487                         if (token.name == "EVAL") {
 488
 489                             //print(JSON.stringify(token, null,4));
 490                             // look back one and see if we can find a comment!!!
 491                             //if (this.ts.look(-1).type == "COMM") {
 492                             if (token.prefix && token.prefix.match(/eval/)) {
 493                                 // look for eval:var:noreplace\n
 494                                 //print("MATCH!?");
 495                                 var _t = this;
 496                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 497                                     //print("GOT: " + a);
 498                                     var hi = _t.getIdentifier(a, scope, token);
 499                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 500                                     if (hi) {
 501                                       //  print("PROTECT "+a+" from munge");
 502                                         //print(JSON.stringify(hi,null,4));
 503                                         hi.toMunge = false;
 504                                     }
 505
 506                                 });
 507
 508
 509                             } else {
 510
 511
 512                                 this.protectScopeFromObfuscation(scope);
 513                                 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);
 514                             }
 515
 516                         }
 517
 518                     }
 519                     break;
 520
 521
 522             } // end switch
 523
 524
 525             //print("parseScope TOK : " + token.toString());
 526             token = this.ts.nextTok();
 527             //if (this.ts.nextT()) break;
 528
 529         }
 530         //print("<<< EXIT SCOPE");
 531         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 532     },
 533
 534     expN : 0,
 535     parseExpression : function(scope) {
 536
 537         // Parse the expression until we encounter a comma or a semi-colon
 538         // in the same brace nesting, bracket nesting and paren nesting.
 539         // Parse functions if any...
 540         //println("<i>EXP</i><BR/>");
 541         !this.debug || print("PARSE EXPR");
 542         this.expN++;
 543
 544         // for printing stuff..
 545
 546
 547
 548         var symbol;
 549         var token;
 550
 551         var identifier;
 552
 553         var expressionBraceNesting = this.braceNesting + 0;
 554         var bracketNesting = 0;
 555         var parensNesting = 0;
 556         var isInObjectLitAr;
 557         var isObjectLitAr = [ false ];
 558
 559
 560
 561
 562         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 563         while (token = this.ts.nextTok()) {
 564
 565
 566
 567            /*
 568             // moved out of loop?
 569            currentScope = this.scopes[this.scopes.length-1];
 570
 571             var scopeIndent = '';
 572             this.scopes.forEach(function() {
 573                 scopeIndent += '   ';
 574             });
 575            */
 576
 577            //this.dumpToken(token,  this.scopes, this.braceNesting );
 578            //print('EXPR' +  token.toString());
 579
 580
 581             //println("<i>"+token.data+"</i>");
 582             //this.log("EXP:" + token.data);
 583             switch (token.type) {
 584                 case 'PUNC':
 585                     //print("EXPR-PUNC:" + token.toString());
 586
 587                     switch(token.data) {
 588
 589                         case ';':
 590                             //print("<< EXIT EXPRESSION");
 591                             break;
 592
 593                         case ',':
 594
 595                             break;
 596
 597
 598                         case '(': //Token.LP:
 599                         case '{': //Token.LC:
 600                         case '[': //Token.LB:
 601                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 602                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 603                             //println("<i>"+token.data+"</i>");
 604                             var curTS = this.ts;
 605                             if (token.props) {
 606
 607                                 for (var prop in token.props) {
 608                                     if (!token.props[prop].val.length) {
 609                                         print(JSON.stringify(token.props, null,4));
 610                                     }
 611
 612                                     if (token.props[prop].val[0].data == 'function') {
 613                                         // parse a function..
 614                                         this.ts = new TokenStream(token.props[prop].val);
 615                                         this.ts.nextTok();
 616                                         this.parseFunctionDeclaration(scope);
 617                                         continue;
 618                                     }
 619                                     // key value..
 620
 621                                     this.ts = new TokenStream(token.props[prop].val);
 622                                     this.parseExpression(scope);
 623
 624                                 }
 625                                 this.ts = curTS;
 626
 627                                 // it's an object literal..
 628                                 // the values could be replaced..
 629                                 break;
 630                             }
 631
 632
 633                             var _this = this;
 634                             token.items.forEach(function(expr) {
 635                                   _this.ts = new TokenStream(expr);
 636                                   _this.parseExpression(scope)
 637                             });
 638                             this.ts = curTS;
 639
 640
 641
 642                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 643                             break;
 644
 645
 646
 647
 648
 649                         case ')': //Token.RP:
 650                         case ']': //Token.RB:
 651                         case '}': //Token.RB:
 652                             //print("<< EXIT EXPRESSION");
 653                             return;
 654
 655
 656
 657                             parensNesting++;
 658                             break;
 659
 660
 661
 662                     }
 663                     break;
 664
 665                 case 'STRN': // used for object lit detection..
 666                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 667                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 668
 669
 670                     break;
 671
 672
 673
 674                 case 'NAME':
 675                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 676
 677                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 678                     } else {
 679                         //print("EXPR-NAME:" + token.toString());
 680                     }
 681                     symbol = token.data;
 682                     //print("in NAME = " + token.toString());
 683                     //print("in NAME 0: " + this.ts.look(0).toString());
 684                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 685
 686                     //print(this.ts.lookTok(-1).data);
 687                     // prefixed with '.'
 688                     if (this.ts.lookTok(-1).data == ".") {
 689                         //skip '.'
 690                         break;
 691                     }
 692                     if (symbol == 'this') {
 693                         break;
 694                        }
 695
 696                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 697
 698                         identifier = this.getIdentifier(symbol, scope, token);
 699                         //println("<B>??</B>");
 700                         if (identifier == false) {
 701
 702                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 703                                 // Here, we found an undeclared and un-namespaced symbol that is
 704                                 // 3 characters or less in length. Declare it in the global scope.
 705                                 // We don't need to declare longer symbols since they won't cause
 706                                 // any conflict with other munged symbols.
 707                                 this.globalScope.declareIdentifier(symbol, token);
 708                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 709                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 710                                 //throw "OOPS";
 711                             } else {
 712                                 //print("undeclared:" + token.toString())
 713                             }
 714
 715
 716                         } else {
 717                             //println("<B>++</B>");
 718                             token.identifier = identifier;
 719                             identifier.refcount++;
 720                         }
 721
 722                     }
 723                     break;
 724
 725
 726
 727
 728                     //println("<B>EID</B>");
 729                 case 'KEYW':
 730                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 731                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 732
 733                     //print('EXPR-KEYW:' + token.toString());
 734                     if (token.name == "FUNCTION") {
 735
 736                         this.parseFunctionDeclaration(scope);
 737                         break;
 738                     }
 739
 740
 741
 742                     symbol = token.data;
 743                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 744
 745                         if (token.name == "EVAL") {
 746                             //print(JSON.stringify(token,null,4));
 747                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 748                                 // look for eval:var:noreplace\n
 749                                // print("GOT MATCH?");
 750                                 var _t = this;
 751                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 752
 753                                     //print("PROTECT: " + a);
 754
 755
 756                                     var hi = _t.getIdentifier(a, scope, token);
 757                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 758                                     if (hi) {
 759                                       //  println("PROTECT "+a+" from munge");
 760                                         hi.toMunge = false;
 761                                     }
 762
 763
 764                                 });
 765
 766                             } else {
 767                                 this.protectScopeFromObfuscation(scope);
 768                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 769                             }
 770
 771
 772                         }
 773                         break;
 774                     }
 775                 default:
 776                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 777                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 778                     break;
 779             }
 780
 781         }
 782         //print("<< EXIT EXPRESSION");
 783         this.expN--;
 784     },
 785
 786
 787     parseCatch : function(scope) {
 788
 789         var symbol;
 790         var token;
 791         var scope;
 792         var identifier;
 793
 794         //token = getToken(-1);
 795         //assert token.getType() == Token.CATCH;
 796         token = this.ts.nextTok();
 797
 798         //print(JSON.stringify(token,null,4));
 799         //assert token.getType() == Token.LP; (
 800         //token = this.ts.nextTok();
 801         //assert token.getType() == Token.NAME;
 802
 803         symbol = token.items[0][0].data;
 804
 805
 806         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 807             // We must declare the exception identifier in the containing function
 808             // scope to avoid errors related to the obfuscation process. No need to
 809             // display a warning if the symbol was already declared here...
 810             scope.declareIdentifier(symbol, token.items[0][0]);
 811         } else {
 812             //?? why inc the refcount?? - that should be set when building the tree???
 813             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 814             identifier.refcount++;
 815         }
 816
 817         token = this.ts.nextTok();
 818         //assert token.getType() == Token.RP; // )
 819     },
 820
 821     parseFunctionDeclaration : function(scope)
 822     {
 823         //print("PARSE FUNCTION");
 824         var symbol;
 825         var token;
 826
 827         var fnScope = false;
 828         var identifier;
 829         var b4braceNesting = this.braceNesting + 0;
 830
 831         //this.logR("<B>PARSING FUNCTION</B>");
 832
 833
 834         token = this.ts.nextTok();
 835         if (token.type == "NAME") {
 836             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 837                 // Get the name of the function and declare it in the current scope.
 838                 symbol = token.data;
 839                 if (scope.getIdentifier(symbol,token) != false) {
 840                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 841                 }
 842                 scope.declareIdentifier(symbol,token);
 843             }
 844             token =  this.ts.nextTok();
 845         }
 846
 847
 848         // return function() {....
 849         while (token.data != "(") {
 850             print(token.toString());
 851             token =  this.ts.nextTok();
 852
 853
 854
 855         }
 856
 857
 858         //assert token.getType() == Token.LP;
 859         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 860             fnScope = new Scope(1, scope, token.n, '', token);
 861
 862             //println("STORING SCOPE" + this.ts.cursor);
 863
 864             this.indexedScopes[token.id] = fnScope;
 865
 866         } else {
 867             //qln("FETCHING SCOPE" + this.ts.cursor);
 868             fnScope = this.indexedScopes[token.id];
 869         }
 870         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 871         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 872         // Parse function arguments.
 873         var args = token.items;
 874         for (var argpos =0; argpos < args.length; argpos++) {
 875
 876             token = args[argpos][0];
 877             //print ("FUNC ARGS: " + token.toString())
 878             //assert token.getType() == Token.NAME ||
 879             //        token.getType() == Token.COMMA;
 880             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 881                 symbol = token.data;
 882                 identifier = fnScope.declareIdentifier(symbol,token);
 883                 if (symbol == "$super" && argpos == 0) {
 884                     // Exception for Prototype 1.6...
 885                     identifier.preventMunging();
 886                 }
 887                 //argpos++;
 888             }
 889         }
 890
 891         token = this.ts.nextTok();
 892         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 893         //Seed.quit();
 894         //print(token.toString());
 895         // assert token.getType() == Token.LC;
 896         //this.braceNesting++;
 897
 898         //token = this.ts.nextTok();
 899         //print(token.toString());
 900         var outTS = this.ts;
 901         var _this = this;
 902         token.items.forEach(function(tar) {
 903             _this.ts = new TokenStream(tar);
 904             _this.parseScope(fnScope);
 905
 906
 907         });
 908
 909         //print(JSON.stringify(this.ts,null,4));
 910         //this.parseScope(fnScope);
 911         this.ts = outTS;
 912         // now pop it off the stack!!!
 913
 914         //this.braceNesting = b4braceNesting;
 915         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 916         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 917         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 918     },
 919
 920     protectScopeFromObfuscation : function(scope) {
 921             //assert scope != null;
 922
 923         if (scope == this.globalScope) {
 924             // The global scope does not get obfuscated,
 925             // so we don't need to worry about it...
 926             return;
 927         }
 928
 929         // Find the highest local scope containing the specified scope.
 930         while (scope && scope.parent != this.globalScope) {
 931             scope = scope.parent;
 932         }
 933
 934         //assert scope.getParentScope() == globalScope;
 935         scope.preventMunging();
 936     },
 937
 938     getIdentifier: function(symbol, scope, token) {
 939         var identifier;
 940         while (scope != false) {
 941             identifier = scope.getIdentifier(symbol, token);
 942             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 943             if (identifier) {
 944                 return identifier;
 945             }
 946             scope = scope.parent;
 947         }
 948         return false;
 949     }
 950 };