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

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