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

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