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

   1 //<Script type="text/javascript">
   2
   3 const Scope = imports.Scope.Scope;
   4 const TokenStream = imports.TokenStream.TokenStream;
   5 /**
   6 * Scope stuff
   7 *
   8 * This code now uses the collapsed tree
   9 *
  10 *
  11 *
  12 */
  13
  14 const 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         this.globalScope.dump();
 180
 181     },
 182
 183
 184     log : function(str)
 185     {
 186         print ("                    ".substring(0, this.braceNesting*2) + str);
 187
 188         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 189     },
 190     logR : function(str)
 191     {
 192             //println("<B>LOG:</B>" + str + "<BR/>");
 193     },
 194
 195
 196
 197
 198
 199     parseScope : function(scope) // parse a token stream..
 200     {
 201         //this.timerPrint("parseScope EnterScope");
 202         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 203         var symbol;
 204         var token;
 205
 206         var identifier;
 207
 208         var expressionBraceNesting = this.braceNesting + 0;
 209
 210         var parensNesting = 0;
 211
 212         var isObjectLitAr = [ false ];
 213         var isInObjectLitAr;
 214
 215
 216         //var scopeIndent = '';
 217         //this.scopes.forEach(function() {
 218         //    scopeIndent += '   ';
 219         //});
 220         //print(">> ENTER SCOPE");
 221
 222
 223
 224
 225         token = this.ts.lookTok(1);
 226         while (token) {
 227           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 228             //this.dumpToken(token , this.scopes, this.braceNesting);
 229             //print('SCOPE:' + token.toString());
 230             //this.log(token.data);
 231             //if (token.type == 'NAME') {
 232             //    print('*' + token.data);
 233             //}
 234             switch(token.type + '.' + token.name) {
 235                 case "KEYW.VAR":
 236                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 237                     //print('SCOPE-VAR:' + token.toString());
 238                     var vstart = this.ts.cursor +1;
 239
 240                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 241                     while (true) {
 242                         token = this.ts.nextTok();
 243                         //!this.debug|| print( token.toString());
 244                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 245                         if (!token) { // can return false at EOF!
 246                             break;
 247                         }
 248                         if (token.name == "VAR" || token.data == ',') { // kludge..
 249                             continue;
 250                         }
 251                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 252                         if (token.type != "NAME") {
 253                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 254                                 print(this.ts.tokens[i].toString());
 255                             }
 256
 257                             print( "var without ident");
 258                             Seed.quit()
 259                         }
 260
 261
 262                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 263                             identifier = scope.getIdentifier(token.data,token) ;
 264
 265                             if (identifier == false) {
 266                                 scope.declareIdentifier(token.data, token);
 267                             } else {
 268                                 token.identifier = identifier;
 269                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 270                             }
 271                         }
 272
 273                         token = this.ts.nextTok();
 274                         !this.debug|| print(token.toString());
 275                         /*
 276                         assert token.getType() == Token.SEMI ||
 277                                 token.getType() == Token.ASSIGN ||
 278                                 token.getType() == Token.COMMA ||
 279                                 token.getType() == Token.IN;
 280                         */
 281                         if (token.name == "IN") {
 282                             break;
 283                         } else {
 284                             //var bn = this.braceNesting;
 285                             var bn = this.braceNesting;
 286                             var nts = [];
 287                             while (true) {
 288                                 if (!token || token.type == 'VOID' || token.data == ',') {
 289                                     break;
 290                                 }
 291                                 nts.push(token);
 292                                 token = this.ts.nextTok();
 293                             }
 294                             if (nts.length) {
 295                                 var TS = this.ts;
 296                                 this.ts = new TokenStream(nts);
 297                                 this.parseExpression(scope);
 298                                 this.ts = TS;
 299                             }
 300
 301                             this.braceNesting = bn;
 302                             //this.braceNesting = bn;
 303                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 304
 305                             token = this.ts.lookTok(1);
 306                             //!this.debug||
 307                            // print("AFTER EXP: " + token.toString());
 308                             if (token.data == ';') {
 309                                 break;
 310                             }
 311                         }
 312                     }
 313
 314                     //print("VAR:")
 315                     //this.ts.dump(vstart , this.ts.cursor);
 316
 317                     break;
 318
 319
 320                 case "KEYW.FUNCTION":
 321                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 322                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 323                     //println("<i>"+token.data+"</i>");
 324                      var bn = this.braceNesting;
 325                     this.parseFunctionDeclaration(scope);
 326                      this.braceNesting = bn;
 327                     break;
 328
 329                 case "PUNC.LEFT_CURLY": // {
 330                 case "PUNC.LEFT_PAREN": // (
 331                 case "PUNC.LEFT_BRACE": // [
 332                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 333                     //println("<i>"+token.data+"</i>");
 334                     var curTS = this.ts;
 335                     if (token.props) {
 336
 337                         // { a : ... , c : .... }
 338
 339                         for (var prop in token.props) {
 340
 341
 342                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 343                             if (token.props[prop].val[0].data == 'function') {
 344                                 // parse a function..
 345                                 this.ts = new TokenStream(token.props[prop].val);
 346                                 this.ts.nextTok();
 347                                 this.parseFunctionDeclaration(scope);
 348
 349                                 continue;
 350                             }
 351                             // key value..
 352
 353                             this.ts = new TokenStream(token.props[prop].val);
 354                             this.parseExpression(scope);
 355
 356                         }
 357                         this.ts = curTS;
 358
 359                         // it's an object literal..
 360                         // the values could be replaced..
 361                         break;
 362                     }
 363
 364                     // ( ... ) or { .... } not object literals..
 365
 366                     var _this = this;
 367                     for (var xx =0; xx < token.items.length; xx++) {
 368                                 expr = token.items[xx];
 369                     //token.items.forEach(function(expr) {
 370                             //print(expr.toString());
 371                            _this.ts = new TokenStream(expr);
 372                             //if (curTS.data == '(') {
 373                                 _this.parseScope(scope)
 374                             //} else {
 375                               //  _this.parseExpression(scope)
 376                             //}
 377
 378                     }
 379                     this.ts = curTS;
 380                     //print("NOT PROPS"); Seed.quit();
 381
 382                     //isObjectLitAr.push(false);
 383                     //this.braceNesting++;
 384
 385                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 386                     break;
 387
 388                 case "PUNC.RIGHT_CURLY": // }
 389                     //print("<< EXIT SCOPE");
 390                     return;
 391
 392                 case "KEYW.WITH":
 393                     //print('SCOPE-WITH:' + token.toString());
 394                     //println("<i>"+token.data+"</i>");
 395                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 396                         // Inside a 'with' block, it is impossible to figure out
 397                         // statically whether a symbol is a local variable or an
 398                         // object member. As a consequence, the only thing we can
 399                         // do is turn the obfuscation off for the highest scope
 400                         // containing the 'with' block.
 401                         this.protectScopeFromObfuscation(scope);
 402                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 403                     }
 404                     break;
 405
 406                 case "KEYW.CATCH":
 407                     //print('SCOPE-CATCH:' + token.toString());
 408                     //println("<i>"+token.data+"</i>");
 409                     this.parseCatch(scope);
 410                     break;
 411
 412                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 413                 case "STRN.SINGLE_QUOTE":
 414                   //  print('SCOPE-STRING:' + token.toString());
 415                     //println("<i>"+token.data+"</i>");
 416
 417                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 418                         // then we are in an object lit.. -> we need to flag the brace as such...
 419                         isObjectLitAr.pop();
 420                         isObjectLitAr.push(true);
 421                         //print(">>>>>> OBJLIT REPUSH(true)");
 422                     }
 423                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 424
 425                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 426                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 427                         // see if we can replace..
 428                         // remove the quotes..
 429                         // should do a bit more checking!!!! (what about wierd char's in the string..
 430                         var str = token.data.substring(1,token.data.length-1);
 431                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 432                             token.outData = str;
 433                         }
 434
 435
 436
 437                     }
 438
 439                     break;
 440
 441                 case "NAME.NAME":
 442                     //print('SCOPE-NAME:' + token.toString());
 443                     //print("DEAL WITH NAME:");
 444                     // got identifier..
 445                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 446                     // skip anyting with "." before it..!!
 447
 448                     if (this.ts.lookTok(-1).data == ".") {
 449                         // skip, it's an object prop.
 450                         //println("<i>"+token.data+"</i>");
 451                         break;
 452                     }
 453                     //print("SYMBOL: " + token.toString());
 454
 455                     symbol = token.data;
 456                     if (symbol == 'this') {
 457                         break;
 458                     }
 459                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 460
 461                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 462
 463                         //print ("MUNGE?" + symbol);
 464
 465                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 466
 467                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 468                         identifier = this.getIdentifier(symbol, scope, token);
 469
 470                         if (identifier == false) {
 471 // BUG!find out where builtin is defined...
 472                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 473                                 // Here, we found an undeclared and un-namespaced symbol that is
 474                                 // 3 characters or less in length. Declare it in the global scope.
 475                                 // We don't need to declare longer symbols since they won't cause
 476                                 // any conflict with other munged symbols.
 477                                 this.globalScope.declareIdentifier(symbol, token);
 478                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 479                             }
 480
 481                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 482                         } else {
 483                             token.identifier = identifier;
 484                             identifier.refcount++;
 485                         }
 486                     }
 487
 488                     break;
 489                     //println("<B>SID</B>");
 490                 default:
 491                     if (token.type != 'KEYW') {
 492                         break;
 493                     }
 494                     //print('SCOPE-KEYW:' + token.toString());
 495                    // print("Check eval:");
 496
 497                     symbol = token.data;
 498
 499                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 500
 501                         if (token.name == "EVAL") {
 502
 503                             //print(JSON.stringify(token, null,4));
 504                             // look back one and see if we can find a comment!!!
 505                             //if (this.ts.look(-1).type == "COMM") {
 506                             if (token.prefix && token.prefix.match(/eval/)) {
 507                                 // look for eval:var:noreplace\n
 508                                 //print("MATCH!?");
 509                                 var _t = this;
 510                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 511                                     //print("GOT: " + a);
 512                                     var hi = _t.getIdentifier(a, scope, token);
 513                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 514                                     if (hi) {
 515                                       //  print("PROTECT "+a+" from munge");
 516                                         //print(JSON.stringify(hi,null,4));
 517                                         hi.toMunge = false;
 518                                     }
 519
 520                                 });
 521
 522
 523                             } else {
 524
 525
 526                                 this.protectScopeFromObfuscation(scope);
 527                                 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);
 528                             }
 529
 530                         }
 531
 532                     }
 533                     break;
 534
 535
 536             } // end switch
 537
 538
 539             //print("parseScope TOK : " + token.toString());
 540             token = this.ts.nextTok();
 541             //if (this.ts.nextT()) break;
 542
 543         }
 544         //print("<<< EXIT SCOPE");
 545         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 546     },
 547
 548     expN : 0,
 549     parseExpression : function(scope) {
 550
 551         // Parse the expression until we encounter a comma or a semi-colon
 552         // in the same brace nesting, bracket nesting and paren nesting.
 553         // Parse functions if any...
 554         //println("<i>EXP</i><BR/>");
 555         !this.debug || print("PARSE EXPR");
 556         this.expN++;
 557
 558         // for printing stuff..
 559
 560
 561
 562         var symbol;
 563         var token;
 564
 565         var identifier;
 566
 567         var expressionBraceNesting = this.braceNesting + 0;
 568         var bracketNesting = 0;
 569         var parensNesting = 0;
 570         var isInObjectLitAr;
 571         var isObjectLitAr = [ false ];
 572
 573
 574
 575
 576         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 577         while ((token = this.ts.nextTok())) {
 578
 579
 580
 581            /*
 582             // moved out of loop?
 583            currentScope = this.scopes[this.scopes.length-1];
 584
 585             var scopeIndent = '';
 586             this.scopes.forEach(function() {
 587                 scopeIndent += '   ';
 588             });
 589            */
 590
 591            //this.dumpToken(token,  this.scopes, this.braceNesting );
 592             //print('EXPR' +  token.toString());
 593
 594
 595             //println("<i>"+token.data+"</i>");
 596             //this.log("EXP:" + token.data);
 597             switch (token.type) {
 598                 case 'PUNC':
 599                     //print("EXPR-PUNC:" + token.toString());
 600
 601                     switch(token.data) {
 602
 603                         case ';':
 604                             //print("<< EXIT EXPRESSION");
 605                             break;
 606
 607                         case ',':
 608
 609                             break;
 610
 611
 612                         case '(': //Token.LP:
 613                         case '{': //Token.LC:
 614                         case '[': //Token.LB:
 615                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 616                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 617                             //println("<i>"+token.data+"</i>");
 618                             var curTS = this.ts;
 619                             if (token.props) {
 620
 621                                 for (var prop in token.props) {
 622                                     if (!token.props[prop].val.length) {
 623                                         print(JSON.stringify(token.props, null,4));
 624                                     }
 625
 626                                     if (token.props[prop].val[0].data == 'function') {
 627                                         // parse a function..
 628                                         this.ts = new TokenStream(token.props[prop].val);
 629                                         this.ts.nextTok();
 630                                         this.parseFunctionDeclaration(scope);
 631                                         continue;
 632                                     }
 633                                     // key value..
 634
 635                                     this.ts = new TokenStream(token.props[prop].val);
 636                                     this.parseExpression(scope);
 637
 638                                 }
 639                                 this.ts = curTS;
 640
 641                                 // it's an object literal..
 642                                 // the values could be replaced..
 643                                 break;
 644                             }
 645
 646
 647                             var _this = this;
 648                             token.items.forEach(function(expr) {
 649                                   _this.ts = new TokenStream(expr);
 650                                   _this.parseExpression(scope)
 651                             });
 652                             this.ts = curTS;
 653
 654
 655
 656                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 657                             break;
 658
 659
 660
 661
 662
 663                         case ')': //Token.RP:
 664                         case ']': //Token.RB:
 665                         case '}': //Token.RB:
 666                             //print("<< EXIT EXPRESSION");
 667                             return;
 668
 669
 670
 671                             parensNesting++;
 672                             break;
 673
 674
 675
 676                     }
 677                     break;
 678
 679                 case 'STRN': // used for object lit detection..
 680                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 681                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 682
 683
 684                     break;
 685
 686
 687
 688                 case 'NAME':
 689                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 690
 691                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 692                     } else {
 693                         //print("EXPR-NAME:" + token.toString());
 694                     }
 695                     symbol = token.data;
 696                     //print("in NAME = " + token.toString());
 697                     //print("in NAME 0: " + this.ts.look(0).toString());
 698                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 699
 700                     //print(this.ts.lookTok(-1).data);
 701                     // prefixed with '.'
 702                     if (this.ts.lookTok(-1).data == ".") {
 703                         //skip '.'
 704                         break;
 705                     }
 706                     if (symbol == 'this') {
 707                         break;
 708                        }
 709
 710                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 711
 712                         identifier = this.getIdentifier(symbol, scope, token);
 713                         //println("<B>??</B>");
 714                         if (identifier == false) {
 715
 716                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 717                                 // Here, we found an undeclared and un-namespaced symbol that is
 718                                 // 3 characters or less in length. Declare it in the global scope.
 719                                 // We don't need to declare longer symbols since they won't cause
 720                                 // any conflict with other munged symbols.
 721                                 this.globalScope.declareIdentifier(symbol, token);
 722                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 723                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 724                                 //throw "OOPS";
 725                             } else {
 726                                 //print("undeclared:" + token.toString())
 727                             }
 728
 729
 730                         } else {
 731                             //println("<B>++</B>");
 732                             token.identifier = identifier;
 733                             identifier.refcount++;
 734                         }
 735
 736                     }
 737                     break;
 738
 739
 740
 741
 742                     //println("<B>EID</B>");
 743                 case 'KEYW':
 744                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 745                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 746
 747                     //print('EXPR-KEYW:' + token.toString());
 748                     if (token.name == "FUNCTION") {
 749
 750                         this.parseFunctionDeclaration(scope);
 751                         break;
 752                     }
 753
 754
 755                     symbol = token.data;
 756                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 757
 758                         if (token.name == "EVAL") {
 759                             //print(JSON.stringify(token,null,4));
 760                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 761                                 // look for eval:var:noreplace\n
 762                                // print("GOT MATCH?");
 763                                 var _t = this;
 764                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 765
 766                                     //print("PROTECT: " + a);
 767
 768
 769                                     var hi = _t.getIdentifier(a, scope, token);
 770                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 771                                     if (hi) {
 772                                       //  println("PROTECT "+a+" from munge");
 773                                         hi.toMunge = false;
 774                                     }
 775
 776
 777                                 });
 778
 779                             } else {
 780                                 this.protectScopeFromObfuscation(scope);
 781                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 782                             }
 783
 784
 785                         }
 786                         break;
 787                     }
 788                 default:
 789                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 790                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 791                     break;
 792             }
 793
 794         }
 795         //print("<< EXIT EXPRESSION");
 796         this.expN--;
 797     },
 798
 799
 800     parseCatch : function(scope) {
 801
 802         var symbol;
 803         var token;
 804
 805         var identifier;
 806
 807         //token = getToken(-1);
 808         //assert token.getType() == Token.CATCH;
 809         token = this.ts.nextTok(1);
 810         token = this.ts.nextTok(1);
 811
 812
 813         //print(JSON.stringify(this.ts,null,4));
 814         //assert token.getType() == Token.LP; (
 815         //token = this.ts.nextTok();
 816         //assert token.getType() == Token.NAME;
 817
 818         symbol = token.items[0][0].data;
 819
 820
 821         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 822             // We must declare the exception identifier in the containing function
 823             // scope to avoid errors related to the obfuscation process. No need to
 824             // display a warning if the symbol was already declared here...
 825             scope.declareIdentifier(symbol, token.items[0][0]);
 826         } else {
 827             //?? why inc the refcount?? - that should be set when building the tree???
 828             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 829             identifier.refcount++;
 830         }
 831
 832         //token = this.ts.nextTok();
 833         //assert token.getType() == Token.RP; // )
 834     },
 835
 836     parseFunctionDeclaration : function(scope)
 837     {
 838         //print("PARSE FUNCTION");
 839         var symbol;
 840         var token;
 841
 842         var fnScope = false;
 843         var identifier;
 844         var b4braceNesting = this.braceNesting + 0;
 845
 846         //this.logR("<B>PARSING FUNCTION</B>");
 847
 848
 849         token = this.ts.nextTok();
 850         if (token.type == "NAME") {
 851             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 852                 // Get the name of the function and declare it in the current scope.
 853                 symbol = token.data;
 854                 if (scope.getIdentifier(symbol,token) != false) {
 855                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 856                 }
 857                 scope.declareIdentifier(symbol,token);
 858             }
 859             token =  this.ts.nextTok();
 860         }
 861
 862
 863         // return function() {....
 864         while (token.data != "(") {
 865             //print(token.toString());
 866             token =  this.ts.nextTok();
 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 };