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

   1 //<Script type="text/javascript">
   2
   3 Scope = imports.Scope.Scope;
   4 TokenStream = imports.TokenStream.TokenStream;
   5 /**
   6 * Scope stuff
   7 *
   8 * // 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         if (scope) {
 227             this.scopes.push(scope);
 228         }
 229
 230
 231         //var scopeIndent = '';
 232         //this.scopes.forEach(function() {
 233         //    scopeIndent += '   ';
 234         //});
 235         print(">> ENTER SCOPE");
 236
 237
 238
 239
 240         token = this.ts.lookTok(1);
 241         while (token) {
 242           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 243             //this.dumpToken(token , this.scopes, this.braceNesting);
 244             print('SCOPE:' + token.toString());
 245             //this.log(token.data);
 246             if (token.type == 'NAME') {
 247             //    print('*' + token.data);
 248             }
 249             switch(token.type + '.' + token.name) {
 250                 case "KEYW.VAR":
 251                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 252                     print('SCOPE-VAR:' + token.toString());
 253                     var vstart = this.ts.cursor +1;
 254
 255                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 256                     while (true) {
 257                         token = this.ts.nextTok();
 258                         //!this.debug|| print( token.toString());
 259                         print('SCOPE-VAR-VAL:' + token.toString());
 260                         if (!token) { // can return false at EOF!
 261                             break;
 262                         }
 263                         if (token.name == "VAR" || token.data == ',') { // kludge..
 264                             continue;
 265                         }
 266                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 267                         if (token.type != "NAME") {
 268                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 269                                 print(this.ts.tokens[i].toString());
 270                             }
 271
 272                             print( "var without ident");
 273                             Seed.quit()
 274                         }
 275
 276
 277                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 278                             identifier = scope.getIdentifier(token.data) ;
 279
 280                             if (identifier == false) {
 281                                 scope.declareIdentifier(token.data, token);
 282                             } else {
 283                                 token.identifier = identifier;
 284                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 285                             }
 286                         }
 287
 288                         token = this.ts.nextTok();
 289                         !this.debug|| print(token.toString());
 290                         /*
 291                         assert token.getType() == Token.SEMI ||
 292                                 token.getType() == Token.ASSIGN ||
 293                                 token.getType() == Token.COMMA ||
 294                                 token.getType() == Token.IN;
 295                         */
 296                         if (token.name == "IN") {
 297                             break;
 298                         } else {
 299                             //var bn = this.braceNesting;
 300                             var bn = this.braceNesting;
 301                             this.parseExpression();
 302                             this.braceNesting = bn;
 303                             //this.braceNesting = bn;
 304                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 305
 306                             token = this.ts.lookTok(1);
 307                             !this.debug|| 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                 case "KEYW.FUNCTION":
 319                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 320                         print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 321                     //println("<i>"+token.data+"</i>");
 322                      var bn = this.braceNesting;
 323                     this.parseFunctionDeclaration();
 324                      this.braceNesting = bn;
 325                     break;
 326
 327                 case "PUNC.LEFT_CURLY": // {
 328                 case "PUNC.LEFT_PAREN": // (
 329                     print('SCOPE-CURLY/PAREN:' + token.toString());
 330                     //println("<i>"+token.data+"</i>");
 331                     var curTS = this.ts;
 332                     if (token.props) {
 333
 334                         for (var prop in token.props) {
 335
 336
 337                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 338                             if (token.props[prop].val[0].data == 'function') {
 339                                 // parse a function..
 340                                 this.ts = new TokenStream(token.props[prop].val);
 341                                 this.ts.nextTok();
 342                                 this.parseFunctionDeclaration();
 343
 344                                 continue;
 345                             }
 346                             // key value..
 347
 348                             this.ts = new TokenStream(token.props[prop].val);
 349                             this.parseScope(scope);
 350
 351                         }
 352                         this.ts = curTS;
 353
 354                         // it's an object literal..
 355                         // the values could be replaced..
 356                         break;
 357                     }
 358
 359
 360                     var _this = this;
 361                     token.items.forEach(function(expr) {
 362                           _this.ts = new TokenStream(expr);
 363                           _this.parseExpression(scope)
 364                     });
 365                     this.ts = curTS;
 366                     //print("NOT PROPS"); Seed.quit();
 367
 368                     //isObjectLitAr.push(false);
 369                     //this.braceNesting++;
 370
 371                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 372                     break;
 373
 374                 case "PUNC.RIGHT_CURLY": // }
 375                     print("<< EXIT SCOPE");
 376                     return;
 377                 /*
 378                     //println("<i>"+token.data+"</i>");
 379                     this.braceNesting--;
 380                     isObjectLitAr.pop();
 381                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 382                         //assert braceNesting >= scope.getBra ceNesting();
 383
 384                     if (this.braceNesting < expressionBraceNesting) {
 385                         var ls = this.scopes.pop();
 386                         ls.getUsedSymbols();
 387                         // eat symbol if we are currently at {
 388                         if (this.ts.look(0).data == '{') {
 389                             this.ts.nextTok();
 390                         }
 391
 392                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 393                         return;
 394                     }
 395                     break;
 396 */
 397                 case "KEYW.WITH":
 398                     print('SCOPE-WITH:' + token.toString());
 399                     //println("<i>"+token.data+"</i>");
 400                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 401                         // Inside a 'with' block, it is impossible to figure out
 402                         // statically whether a symbol is a local variable or an
 403                         // object member. As a consequence, the only thing we can
 404                         // do is turn the obfuscation off for the highest scope
 405                         // containing the 'with' block.
 406                         this.protectScopeFromObfuscation(scope);
 407                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 408                     }
 409                     break;
 410
 411                 case "KEYW.CATCH":
 412                     print('SCOPE-CATCH:' + token.toString());
 413                     //println("<i>"+token.data+"</i>");
 414                     this.parseCatch();
 415                     break;
 416                 /*
 417                 case Token.SPECIALCOMMENT:
 418                         if (mode == BUILDING_SYMBOL_TREE) {
 419                             protectScopeFromObfuscation(scope);
 420                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 421                         }
 422                         break;
 423                 */
 424
 425                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 426                 case "STRN.SINGLE_QUOTE":
 427                     print('SCOPE-STRING:' + token.toString());
 428                     //println("<i>"+token.data+"</i>");
 429
 430                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 431                         // then we are in an object lit.. -> we need to flag the brace as such...
 432                         isObjectLitAr.pop();
 433                         isObjectLitAr.push(true);
 434                         //print(">>>>>> OBJLIT REPUSH(true)");
 435                     }
 436                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 437
 438                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 439                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 440                         // see if we can replace..
 441                         // remove the quotes..
 442                         // should do a bit more checking!!!! (what about wierd char's in the string..
 443                         var str = token.data.substring(1,token.data.length-1);
 444                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 445                             token.outData = str;
 446                         }
 447
 448
 449
 450                     }
 451
 452
 453
 454                     break;
 455
 456                 case "NAME.NAME":
 457                     print('SCOPE-NAME:' + token.toString());
 458                     //print("DEAL WITH NAME:");
 459                     // got identifier..
 460
 461                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 462                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 463                         isObjectLitAr.pop();
 464                         isObjectLitAr.push(true);
 465                         //print(">>>>>> OBJLIT REPUSH(true)");
 466                         //println("<i>"+token.data+"</i>");
 467                         break;
 468                     }
 469                    // print("DEAL WITH obj lit:");
 470                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 471
 472                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 473                         // skip, it's an object lit key..
 474                         //println("<i>"+token.data+"</i>");
 475                         break;
 476                     }
 477
 478
 479                     // skip anyting with "." before it..!!
 480
 481                     if (this.ts.lookTok(-1).data == ".") {
 482                         // skip, it's an object prop.
 483                         //println("<i>"+token.data+"</i>");
 484                         break;
 485                     }
 486                     //print("SYMBOL: " + token.toString());
 487
 488                     symbol = token.data;
 489                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 490
 491                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 492
 493                         //print ("MUNGE?" + symbol);
 494
 495                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 496
 497                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 498                         identifier = this.getIdentifier(symbol, scope);
 499
 500                         if (identifier == false) {
 501 // BUG!find out where builtin is defined...
 502                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 503                                 // Here, we found an undeclared and un-namespaced symbol that is
 504                                 // 3 characters or less in length. Declare it in the global scope.
 505                                 // We don't need to declare longer symbols since they won't cause
 506                                 // any conflict with other munged symbols.
 507                                 this.globalScope.declareIdentifier(symbol, token);
 508                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 509                             }
 510
 511                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 512                         } else {
 513                             token.identifier = identifier;
 514                             identifier.refcount++;
 515                         }
 516                     }
 517
 518                     break;
 519                     //println("<B>SID</B>");
 520                 default:
 521                     if (token.type != 'KEYW') {
 522                         break;
 523                     }
 524                     print('SCOPE-KEYW:' + token.toString());
 525                    // print("Check eval:");
 526
 527                     symbol = token.data;
 528
 529                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 530
 531                         if (symbol == "eval") {
 532                             // look back one and see if we can find a comment!!!
 533                             if (this.ts.look(-1).type == "COMM") {
 534                                 // look for eval:var:noreplace\n
 535                                 var _t = this;
 536                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 537
 538                                     var hi = _t.getIdentifier(a, scope);
 539                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 540                                     if (hi) {
 541                                      //   println("PROTECT "+a+" from munge");
 542                                         hi.toMunge = false;
 543                                     }
 544
 545                                 });
 546
 547
 548                             } else {
 549
 550
 551                                 this.protectScopeFromObfuscation(scope);
 552                                 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);
 553                             }
 554
 555                         }
 556
 557                     }
 558                     break;
 559
 560
 561             } // end switch
 562
 563
 564             //print("parseScope TOK : " + token.toString());
 565             token = this.ts.nextTok();
 566             //if (this.ts.nextT()) break;
 567
 568         }
 569         print("<<< EXIT SCOPE");
 570         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 571     },
 572
 573     expN : 0,
 574     parseExpression : function() {
 575
 576         // Parse the expression until we encounter a comma or a semi-colon
 577         // in the same brace nesting, bracket nesting and paren nesting.
 578         // Parse functions if any...
 579         //println("<i>EXP</i><BR/>");
 580         !this.debug || print("PARSE EXPR");
 581         this.expN++;
 582
 583         // for printing stuff..
 584
 585
 586
 587         var symbol;
 588         var token;
 589         var currentScope;
 590         var identifier;
 591
 592         var expressionBraceNesting = this.braceNesting + 0;
 593         var bracketNesting = 0;
 594         var parensNesting = 0;
 595         var isInObjectLitAr;
 596         var isObjectLitAr = [ false ];
 597
 598         currentScope = this.scopes[this.scopes.length-1];
 599
 600
 601         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 602         while (token = this.ts.nextTok()) {
 603
 604
 605
 606            /*
 607             // moved out of loop?
 608            currentScope = this.scopes[this.scopes.length-1];
 609
 610             var scopeIndent = '';
 611             this.scopes.forEach(function() {
 612                 scopeIndent += '   ';
 613             });
 614            */
 615
 616            //this.dumpToken(token,  this.scopes, this.braceNesting );
 617            print('EXP' +  token.toString());
 618
 619
 620             //println("<i>"+token.data+"</i>");
 621             //this.log("EXP:" + token.data);
 622             switch (token.type) {
 623                 case 'PUNC':
 624                     print("EXPR-PUNC:" + token.toString());
 625
 626                     switch(token.data) {
 627
 628                         case ';':
 629                             print("<< EXIT EXPRESSION");
 630                             break;
 631
 632                         case ',':
 633
 634                             break;
 635
 636
 637                         case '(': //Token.LP:
 638                         case '{': //Token.LC:
 639                         case '[': //Token.LB:
 640                             print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 641                             //println("<i>"+token.data+"</i>");
 642                             var curTS = this.ts;
 643                             if (token.props) {
 644
 645                                 for (var prop in token.props) {
 646                                     if (token.props[prop].val.data == 'function') {
 647                                         // parse a function..
 648                                         this.parseFunctProp(token.props[prop]);
 649                                         continue;
 650                                     }
 651                                     // key value..
 652
 653                                     this.ts = new TokenStream(token.props[prop].val);
 654                                     this.parseScope(currentScope);
 655
 656                                 }
 657                                 this.ts = curTS;
 658
 659                                 // it's an object literal..
 660                                 // the values could be replaced..
 661                                 break;
 662                             }
 663
 664
 665                             var _this = this;
 666                             token.items.forEach(function(expr) {
 667                                   _this.ts = new TokenStream(expr);
 668                                   _this.parseExpression()
 669                             });
 670                             this.ts = curTS;
 671
 672
 673
 674                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 675                             break;
 676
 677
 678
 679
 680
 681                         case ')': //Token.RP:
 682                         case ']': //Token.RB:
 683                         case '}': //Token.RB:
 684                             print("<< EXIT EXPRESSION");
 685                             return;
 686
 687
 688
 689                             parensNesting++;
 690                             break;
 691
 692
 693
 694                     }
 695                     break;
 696
 697                 case 'STRN': // used for object lit detection..
 698                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 699                         print("EXPR-STR:" + JSON.stringify(token, null, 4));
 700
 701
 702                     break;
 703
 704
 705
 706                 case 'NAME':
 707                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 708                         print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 709                     symbol = token.data;
 710                     //print("in NAME = " + token.toString());
 711                     //print("in NAME 0: " + this.ts.look(0).toString());
 712                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 713
 714                     //print(this.ts.lookTok(0).data);
 715                     // prefixed with '.'
 716                     if (this.ts.lookTok(0).data == ".") {
 717                         //skip '.'
 718                         break;
 719                     }
 720
 721
 722                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 723
 724                         identifier = this.getIdentifier(symbol, currentScope);
 725                         //println("<B>??</B>");
 726                         if (identifier == false) {
 727
 728                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 729                                 // Here, we found an undeclared and un-namespaced symbol that is
 730                                 // 3 characters or less in length. Declare it in the global scope.
 731                                 // We don't need to declare longer symbols since they won't cause
 732                                 // any conflict with other munged symbols.
 733                                 this.globalScope.declareIdentifier(symbol, token);
 734                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 735                             } else {
 736                                 print("undeclared:" + token.toString())
 737                             }
 738
 739
 740                         } else {
 741                             //println("<B>++</B>");
 742                             token.identifier = identifier;
 743                             identifier.refcount++;
 744                         }
 745
 746                     }
 747                     break;
 748
 749
 750
 751
 752                     //println("<B>EID</B>");
 753                 case 'KEYW':
 754                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 755                         print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 756                     if (token.name == "FUNCTION") {
 757
 758                         this.parseFunctionDeclaration();
 759                         break;
 760                     }
 761
 762
 763
 764                     symbol = token.data;
 765                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 766
 767                         if (symbol == "eval") {
 768                             if (this.ts.look(-1).type == 'COMM') {
 769                                 // look for eval:var:noreplace\n
 770                                 var _t = this;
 771                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 772                                     var hi = _t.getIdentifier(a, currentScope);
 773                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 774                                     if (hi) {
 775                                       //  println("PROTECT "+a+" from munge");
 776                                         hi.toMunge = false;
 777                                     }
 778
 779
 780                                 });
 781
 782                             } else {
 783                                 this.protectScopeFromObfuscation(currentScope);
 784                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 785                             }
 786
 787
 788                         }
 789                         break;
 790                     }
 791                 default:
 792                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 793                         print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 794                     break;
 795             }
 796
 797         }
 798         print("<< EXIT EXPRESSION");
 799         this.expN--;
 800     },
 801
 802
 803     parseCatch : function() {
 804
 805         var symbol;
 806         var token;
 807         var currentScope;
 808         var identifier;
 809
 810         //token = getToken(-1);
 811         //assert token.getType() == Token.CATCH;
 812         token = this.ts.nextTok();
 813         //assert token.getType() == Token.LP; (
 814         token = this.ts.nextTok();
 815         //assert token.getType() == Token.NAME;
 816
 817         symbol = token.data;
 818         currentScope = this.scopes[this.scopes.length-1];
 819
 820         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 821             // We must declare the exception identifier in the containing function
 822             // scope to avoid errors related to the obfuscation process. No need to
 823             // display a warning if the symbol was already declared here...
 824             currentScope.declareIdentifier(symbol, token);
 825         } else {
 826             //?? why inc the refcount?? - that should be set when building the tree???
 827             identifier = this.getIdentifier(symbol, currentScope);
 828             identifier.refcount++;
 829         }
 830
 831         token = this.ts.nextTok();
 832         //assert token.getType() == Token.RP; // )
 833     },
 834
 835     parseFunctionDeclaration : function()
 836     {
 837         //print("PARSE FUNCTION");
 838         var symbol;
 839         var token;
 840         var currentScope  = false;
 841         var fnScope = false;
 842         var identifier;
 843         var b4braceNesting = this.braceNesting + 0;
 844
 845         //this.logR("<B>PARSING FUNCTION</B>");
 846         currentScope = this.scopes[this.scopes.length-1];
 847
 848         token = this.ts.nextTok();
 849         if (token.type == "NAME") {
 850             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 851                 // Get the name of the function and declare it in the current scope.
 852                 symbol = token.data;
 853                 if (currentScope.getIdentifier(symbol) != false) {
 854                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 855                 }
 856                 currentScope.declareIdentifier(symbol,token);
 857             }
 858             token =  this.ts.nextTok();
 859         }
 860
 861         //assert token.getType() == Token.LP;
 862         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 863             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 864
 865             //println("STORING SCOPE" + this.ts.cursor);
 866
 867             this.indexedScopes[this.ts.cursor] = fnScope;
 868
 869         } else {
 870             //qln("FETCHING SCOPE" + this.ts.cursor);
 871             fnScope = this.indexedScopes[this.ts.cursor];
 872
 873         }
 874         if (this.mode == 'BUILDING_SYMBOL_TREE')
 875             print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 876         // Parse function arguments.
 877         var args = token.items;
 878         for (var argpos =0; argpos < args.length; argpos++) {
 879
 880             token = args[argpos][0];
 881             print ("FUNC ARGS: " + token.toString())
 882             //assert token.getType() == Token.NAME ||
 883             //        token.getType() == Token.COMMA;
 884             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 885                 symbol = token.data;
 886                 identifier = fnScope.declareIdentifier(symbol,token);
 887                 if (symbol == "$super" && argpos == 0) {
 888                     // Exception for Prototype 1.6...
 889                     identifier.preventMunging();
 890                 }
 891                 //argpos++;
 892             }
 893         }
 894
 895         token = this.ts.nextTok();
 896         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 897         //Seed.quit();
 898         //print(token.toString());
 899         // assert token.getType() == Token.LC;
 900         //this.braceNesting++;
 901
 902         //token = this.ts.nextTok();
 903         //print(token.toString());
 904         var outTS = this.ts;
 905         var _this = this;
 906         token.items.forEach(function(tar) {
 907             _this.ts = new TokenStream(tar);
 908             _this.parseScope(fnScope);
 909
 910         });
 911
 912         //print(JSON.stringify(this.ts,null,4));
 913         //this.parseScope(fnScope);
 914         this.ts = outTS;
 915         // now pop it off the stack!!!
 916
 917         //this.braceNesting = b4braceNesting;
 918         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 919         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 920         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 921     },
 922
 923     protectScopeFromObfuscation : function(scope) {
 924             //assert scope != null;
 925
 926         if (scope == this.globalScope) {
 927             // The global scope does not get obfuscated,
 928             // so we don't need to worry about it...
 929             return;
 930         }
 931
 932         // Find the highest local scope containing the specified scope.
 933         while (scope && scope.parent != this.globalScope) {
 934             scope = scope.parent;
 935         }
 936
 937         //assert scope.getParentScope() == globalScope;
 938         scope.preventMunging();
 939     },
 940
 941     getIdentifier: function(symbol, scope) {
 942         var identifier;
 943         while (scope != false) {
 944             identifier = scope.getIdentifier(symbol);
 945             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 946             if (identifier) {
 947                 return identifier;
 948             }
 949             scope = scope.parent;
 950         }
 951         return false;
 952     }
 953 };