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         print(JSON.stringify(this.ts.tokens, null,4));
 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         thisScope = scope;
 227         if (thisScope && thisScope.gid != this.scopes[this.scopes.length-1]) {
 228             this.scopes.push(scope);
 229         } else {
 230             thisScope = this.scopes[this.scopes.length-1]
 231         }
 232
 233         //var scopeIndent = '';
 234         //this.scopes.forEach(function() {
 235         //    scopeIndent += '   ';
 236         //});
 237         //print(">> ENTER SCOPE");
 238
 239
 240
 241
 242         token = this.ts.lookTok(1);
 243         while (token) {
 244           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 245             //this.dumpToken(token , this.scopes, this.braceNesting);
 246             //print('SCOPE:' + token.toString());
 247             //this.log(token.data);
 248             if (token.type == 'NAME') {
 249             //    print('*' + token.data);
 250             }
 251             switch(token.type + '.' + token.name) {
 252                 case "KEYW.VAR":
 253                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 254                     //print('SCOPE-VAR:' + token.toString());
 255                     var vstart = this.ts.cursor +1;
 256
 257                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 258                     while (true) {
 259                         token = this.ts.nextTok();
 260                         //!this.debug|| print( token.toString());
 261                         print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 262                         if (!token) { // can return false at EOF!
 263                             break;
 264                         }
 265                         if (token.name == "VAR" || token.data == ',') { // kludge..
 266                             continue;
 267                         }
 268                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 269                         if (token.type != "NAME") {
 270                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 271                                 print(this.ts.tokens[i].toString());
 272                             }
 273
 274                             print( "var without ident");
 275                             Seed.quit()
 276                         }
 277
 278
 279                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 280                             identifier = thisScope.getIdentifier(token.data,token) ;
 281
 282                             if (identifier == false) {
 283                                 thisScope.declareIdentifier(token.data, token);
 284                             } else {
 285                                 token.identifier = identifier;
 286                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 287                             }
 288                         }
 289
 290                         token = this.ts.nextTok();
 291                         !this.debug|| print(token.toString());
 292                         /*
 293                         assert token.getType() == Token.SEMI ||
 294                                 token.getType() == Token.ASSIGN ||
 295                                 token.getType() == Token.COMMA ||
 296                                 token.getType() == Token.IN;
 297                         */
 298                         if (token.name == "IN") {
 299                             break;
 300                         } else {
 301                             //var bn = this.braceNesting;
 302                             var bn = this.braceNesting;
 303                             var nts = [];
 304                             while (true) {
 305                                 var n = this.ts.lookTok();
 306                                 print(n.toString());
 307                                 if (!n || n.type == 'VOID' || n.data == ',') {
 308                                     break;
 309                                 }
 310                                 nts.push(n);
 311                                 this.ts.nextTok();
 312                             }
 313                             if (nts.length) {
 314                                 var TS = this.ts;
 315                                 this.ts = new TokenStream(nts);
 316                                 this.parseExpression();
 317                                 this.ts = TS;
 318                             }
 319
 320                             this.braceNesting = bn;
 321                             //this.braceNesting = bn;
 322                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 323
 324                             token = this.ts.lookTok(1);
 325                             !this.debug|| print("AFTER EXP: " + token.toString());
 326                             if (token.data == ';') {
 327                                 break;
 328                             }
 329                         }
 330                     }
 331
 332                     //print("VAR:")
 333                     //this.ts.dump(vstart , this.ts.cursor);
 334
 335                     break;
 336                 case "KEYW.FUNCTION":
 337                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 338                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 339                     //println("<i>"+token.data+"</i>");
 340                      var bn = this.braceNesting;
 341                     this.parseFunctionDeclaration();
 342                      this.braceNesting = bn;
 343                     break;
 344
 345                 case "PUNC.LEFT_CURLY": // {
 346                 case "PUNC.LEFT_PAREN": // (
 347                 case "PUNC.LEFT_BRACE": // [
 348                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 349                     //println("<i>"+token.data+"</i>");
 350                     var curTS = this.ts;
 351                     if (token.props) {
 352
 353                         for (var prop in token.props) {
 354
 355
 356                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 357                             if (token.props[prop].val[0].data == 'function') {
 358                                 // parse a function..
 359                                 this.ts = new TokenStream(token.props[prop].val);
 360                                 this.ts.nextTok();
 361                                 this.parseFunctionDeclaration();
 362
 363                                 continue;
 364                             }
 365                             // key value..
 366
 367                             this.ts = new TokenStream(token.props[prop].val);
 368                             this.parseExpression();
 369
 370                         }
 371                         this.ts = curTS;
 372
 373                         // it's an object literal..
 374                         // the values could be replaced..
 375                         break;
 376                     }
 377
 378
 379                     var _this = this;
 380                     token.items.forEach(function(expr) {
 381                           _this.ts = new TokenStream(expr);
 382                           _this.parseExpression()
 383                     });
 384                     this.ts = curTS;
 385                     //print("NOT PROPS"); Seed.quit();
 386
 387                     //isObjectLitAr.push(false);
 388                     //this.braceNesting++;
 389
 390                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 391                     break;
 392
 393                 case "PUNC.RIGHT_CURLY": // }
 394                     //print("<< EXIT SCOPE");
 395                     return;
 396                 /*
 397                     //println("<i>"+token.data+"</i>");
 398                     this.braceNesting--;
 399                     isObjectLitAr.pop();
 400                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 401                         //assert braceNesting >= scope.getBra ceNesting();
 402
 403                     if (this.braceNesting < expressionBraceNesting) {
 404                         var ls = this.scopes.pop();
 405                         ls.getUsedSymbols();
 406                         // eat symbol if we are currently at {
 407                         if (this.ts.look(0).data == '{') {
 408                             this.ts.nextTok();
 409                         }
 410
 411                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 412                         return;
 413                     }
 414                     break;
 415 */
 416                 case "KEYW.WITH":
 417                     //print('SCOPE-WITH:' + token.toString());
 418                     //println("<i>"+token.data+"</i>");
 419                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 420                         // Inside a 'with' block, it is impossible to figure out
 421                         // statically whether a symbol is a local variable or an
 422                         // object member. As a consequence, the only thing we can
 423                         // do is turn the obfuscation off for the highest scope
 424                         // containing the 'with' block.
 425                         this.protectScopeFromObfuscation(thisScope);
 426                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 427                     }
 428                     break;
 429
 430                 case "KEYW.CATCH":
 431                     //print('SCOPE-CATCH:' + token.toString());
 432                     //println("<i>"+token.data+"</i>");
 433                     this.parseCatch();
 434                     break;
 435                 /*
 436                 case Token.SPECIALCOMMENT:
 437                         if (mode == BUILDING_SYMBOL_TREE) {
 438                             protectScopeFromObfuscation(scope);
 439                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 440                         }
 441                         break;
 442                 */
 443
 444                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 445                 case "STRN.SINGLE_QUOTE":
 446                   //  print('SCOPE-STRING:' + token.toString());
 447                     //println("<i>"+token.data+"</i>");
 448
 449                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 450                         // then we are in an object lit.. -> we need to flag the brace as such...
 451                         isObjectLitAr.pop();
 452                         isObjectLitAr.push(true);
 453                         //print(">>>>>> OBJLIT REPUSH(true)");
 454                     }
 455                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 456
 457                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 458                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 459                         // see if we can replace..
 460                         // remove the quotes..
 461                         // should do a bit more checking!!!! (what about wierd char's in the string..
 462                         var str = token.data.substring(1,token.data.length-1);
 463                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 464                             token.outData = str;
 465                         }
 466
 467
 468
 469                     }
 470
 471
 472
 473                     break;
 474
 475                 case "NAME.NAME":
 476                     //print('SCOPE-NAME:' + token.toString());
 477                     //print("DEAL WITH NAME:");
 478                     // got identifier..
 479
 480                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 481
 482
 483                     // skip anyting with "." before it..!!
 484
 485                     if (this.ts.lookTok(-1).data == ".") {
 486                         // skip, it's an object prop.
 487                         //println("<i>"+token.data+"</i>");
 488                         break;
 489                     }
 490                     //print("SYMBOL: " + token.toString());
 491
 492                     symbol = token.data;
 493                     if (symbol == 'this') {
 494                         break;
 495                     }
 496                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 497
 498                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 499
 500                         //print ("MUNGE?" + symbol);
 501
 502                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 503
 504                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 505                         identifier = this.getIdentifier(symbol, thisScope, token);
 506
 507                         if (identifier == false) {
 508 // BUG!find out where builtin is defined...
 509                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 510                                 // Here, we found an undeclared and un-namespaced symbol that is
 511                                 // 3 characters or less in length. Declare it in the global scope.
 512                                 // We don't need to declare longer symbols since they won't cause
 513                                 // any conflict with other munged symbols.
 514                                 this.globalScope.declareIdentifier(symbol, token);
 515                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 516                             }
 517
 518                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 519                         } else {
 520                             token.identifier = identifier;
 521                             identifier.refcount++;
 522                         }
 523                     }
 524
 525                     break;
 526                     //println("<B>SID</B>");
 527                 default:
 528                     if (token.type != 'KEYW') {
 529                         break;
 530                     }
 531                     //print('SCOPE-KEYW:' + token.toString());
 532                    // print("Check eval:");
 533
 534                     symbol = token.data;
 535
 536                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 537
 538                         if (symbol == "eval") {
 539                             // look back one and see if we can find a comment!!!
 540                             //if (this.ts.look(-1).type == "COMM") {
 541                             if (token.prefix && token.prefix.match('/eval/')) {
 542                                 // look for eval:var:noreplace\n
 543                                 var _t = this;
 544                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 545
 546                                     var hi = _t.getIdentifier(a, thisScope, token);
 547                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 548                                     if (hi) {
 549                                      //   println("PROTECT "+a+" from munge");
 550                                         hi.toMunge = false;
 551                                     }
 552
 553                                 });
 554
 555
 556                             } else {
 557
 558
 559                                 this.protectScopeFromObfuscation(thisScope);
 560                                 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);
 561                             }
 562
 563                         }
 564
 565                     }
 566                     break;
 567
 568
 569             } // end switch
 570
 571
 572             //print("parseScope TOK : " + token.toString());
 573             token = this.ts.nextTok();
 574             //if (this.ts.nextT()) break;
 575
 576         }
 577         //print("<<< EXIT SCOPE");
 578         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 579     },
 580
 581     expN : 0,
 582     parseExpression : function() {
 583
 584         // Parse the expression until we encounter a comma or a semi-colon
 585         // in the same brace nesting, bracket nesting and paren nesting.
 586         // Parse functions if any...
 587         //println("<i>EXP</i><BR/>");
 588         !this.debug || print("PARSE EXPR");
 589         this.expN++;
 590
 591         // for printing stuff..
 592
 593
 594
 595         var symbol;
 596         var token;
 597         var currentScope;
 598         var identifier;
 599
 600         var expressionBraceNesting = this.braceNesting + 0;
 601         var bracketNesting = 0;
 602         var parensNesting = 0;
 603         var isInObjectLitAr;
 604         var isObjectLitAr = [ false ];
 605
 606         currentScope = this.scopes[this.scopes.length-1];
 607
 608
 609         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 610         while (token = this.ts.nextTok()) {
 611
 612
 613
 614            /*
 615             // moved out of loop?
 616            currentScope = this.scopes[this.scopes.length-1];
 617
 618             var scopeIndent = '';
 619             this.scopes.forEach(function() {
 620                 scopeIndent += '   ';
 621             });
 622            */
 623
 624            //this.dumpToken(token,  this.scopes, this.braceNesting );
 625            //print('EXP' +  token.toString());
 626
 627
 628             //println("<i>"+token.data+"</i>");
 629             //this.log("EXP:" + token.data);
 630             switch (token.type) {
 631                 case 'PUNC':
 632                     //print("EXPR-PUNC:" + token.toString());
 633
 634                     switch(token.data) {
 635
 636                         case ';':
 637                             //print("<< EXIT EXPRESSION");
 638                             break;
 639
 640                         case ',':
 641
 642                             break;
 643
 644
 645                         case '(': //Token.LP:
 646                         case '{': //Token.LC:
 647                         case '[': //Token.LB:
 648                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 649                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 650                             //println("<i>"+token.data+"</i>");
 651                             var curTS = this.ts;
 652                             if (token.props) {
 653
 654                                 for (var prop in token.props) {
 655                                     if (token.props[prop].val[0].data == 'function') {
 656                                         // parse a function..
 657                                         this.ts = new TokenStream(token.props[prop].val);
 658                                         this.ts.nextTok();
 659                                         this.parseFunctionDeclaration();
 660                                         continue;
 661                                     }
 662                                     // key value..
 663
 664                                     this.ts = new TokenStream(token.props[prop].val);
 665                                     this.parseExpression();
 666
 667                                 }
 668                                 this.ts = curTS;
 669
 670                                 // it's an object literal..
 671                                 // the values could be replaced..
 672                                 break;
 673                             }
 674
 675
 676                             var _this = this;
 677                             token.items.forEach(function(expr) {
 678                                   _this.ts = new TokenStream(expr);
 679                                   _this.parseExpression()
 680                             });
 681                             this.ts = curTS;
 682
 683
 684
 685                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 686                             break;
 687
 688
 689
 690
 691
 692                         case ')': //Token.RP:
 693                         case ']': //Token.RB:
 694                         case '}': //Token.RB:
 695                             //print("<< EXIT EXPRESSION");
 696                             return;
 697
 698
 699
 700                             parensNesting++;
 701                             break;
 702
 703
 704
 705                     }
 706                     break;
 707
 708                 case 'STRN': // used for object lit detection..
 709                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 710                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 711
 712
 713                     break;
 714
 715
 716
 717                 case 'NAME':
 718                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 719
 720                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 721                     } else {
 722                         //print("EXPR-NAME:" + token.toString());
 723                     }
 724                     symbol = token.data;
 725                     //print("in NAME = " + token.toString());
 726                     //print("in NAME 0: " + this.ts.look(0).toString());
 727                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 728
 729                     //print(this.ts.lookTok(-1).data);
 730                     // prefixed with '.'
 731                     if (this.ts.lookTok(-1).data == ".") {
 732                         //skip '.'
 733                         break;
 734                     }
 735                     if (symbol == 'this') {
 736                         break;
 737                        }
 738
 739                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 740
 741                         identifier = this.getIdentifier(symbol, currentScope, token);
 742                         //println("<B>??</B>");
 743                         if (identifier == false) {
 744
 745                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 746                                 // Here, we found an undeclared and un-namespaced symbol that is
 747                                 // 3 characters or less in length. Declare it in the global scope.
 748                                 // We don't need to declare longer symbols since they won't cause
 749                                 // any conflict with other munged symbols.
 750                                 this.globalScope.declareIdentifier(symbol, token);
 751                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 752                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 753                                 //throw "OOPS";
 754                             } else {
 755                                 //print("undeclared:" + token.toString())
 756                             }
 757
 758
 759                         } else {
 760                             //println("<B>++</B>");
 761                             token.identifier = identifier;
 762                             identifier.refcount++;
 763                         }
 764
 765                     }
 766                     break;
 767
 768
 769
 770
 771                     //println("<B>EID</B>");
 772                 case 'KEYW':
 773                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 774                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 775                     if (token.name == "FUNCTION") {
 776
 777                         this.parseFunctionDeclaration();
 778                         break;
 779                     }
 780
 781
 782
 783                     symbol = token.data;
 784                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 785
 786                         if (symbol == "eval") {
 787                             if (token.prefix && token.prefix.match('/eval/')) {
 788                                 // look for eval:var:noreplace\n
 789                                 var _t = this;
 790                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 791                                     var hi = _t.getIdentifier(a, currentScope, token);
 792                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 793                                     if (hi) {
 794                                       //  println("PROTECT "+a+" from munge");
 795                                         hi.toMunge = false;
 796                                     }
 797
 798
 799                                 });
 800
 801                             } else {
 802                                 this.protectScopeFromObfuscation(currentScope);
 803                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 804                             }
 805
 806
 807                         }
 808                         break;
 809                     }
 810                 default:
 811                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 812                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 813                     break;
 814             }
 815
 816         }
 817         //print("<< EXIT EXPRESSION");
 818         this.expN--;
 819     },
 820
 821
 822     parseCatch : function() {
 823
 824         var symbol;
 825         var token;
 826         var currentScope;
 827         var identifier;
 828
 829         //token = getToken(-1);
 830         //assert token.getType() == Token.CATCH;
 831         token = this.ts.nextTok();
 832         //assert token.getType() == Token.LP; (
 833         //token = this.ts.nextTok();
 834         //assert token.getType() == Token.NAME;
 835
 836         symbol = token.items[0].data;
 837         currentScope = this.scopes[this.scopes.length-1];
 838
 839         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 840             // We must declare the exception identifier in the containing function
 841             // scope to avoid errors related to the obfuscation process. No need to
 842             // display a warning if the symbol was already declared here...
 843             currentScope.declareIdentifier(symbol, token);
 844         } else {
 845             //?? why inc the refcount?? - that should be set when building the tree???
 846             identifier = this.getIdentifier(symbol, currentScope, token);
 847             identifier.refcount++;
 848         }
 849
 850         token = this.ts.nextTok();
 851         //assert token.getType() == Token.RP; // )
 852     },
 853
 854     parseFunctionDeclaration : function()
 855     {
 856         //print("PARSE FUNCTION");
 857         var symbol;
 858         var token;
 859         var currentScope  = false;
 860         var fnScope = false;
 861         var identifier;
 862         var b4braceNesting = this.braceNesting + 0;
 863
 864         //this.logR("<B>PARSING FUNCTION</B>");
 865         currentScope = this.scopes[this.scopes.length-1];
 866
 867         token = this.ts.nextTok();
 868         if (token.type == "NAME") {
 869             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 870                 // Get the name of the function and declare it in the current scope.
 871                 symbol = token.data;
 872                 if (currentScope.getIdentifier(symbol,token) != false) {
 873                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 874                 }
 875                 currentScope.declareIdentifier(symbol,token);
 876             }
 877             token =  this.ts.nextTok();
 878         }
 879         // return function() {....
 880         if (token.name == "RETURN") {
 881             token =  this.ts.nextTok();
 882         }
 883         if (token.name == "FUNCTION") {
 884             token =  this.ts.nextTok();
 885         }
 886         //assert token.getType() == Token.LP;
 887         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 888             fnScope = new Scope(1, currentScope, token.n, '', token);
 889
 890             //println("STORING SCOPE" + this.ts.cursor);
 891
 892             this.indexedScopes[token.id] = fnScope;
 893
 894         } else {
 895             //qln("FETCHING SCOPE" + this.ts.cursor);
 896             fnScope = this.indexedScopes[token.id];
 897         }
 898         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 899            // print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 900         // Parse function arguments.
 901         var args = token.items;
 902         for (var argpos =0; argpos < args.length; argpos++) {
 903
 904             token = args[argpos][0];
 905             //print ("FUNC ARGS: " + token.toString())
 906             //assert token.getType() == Token.NAME ||
 907             //        token.getType() == Token.COMMA;
 908             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 909                 symbol = token.data;
 910                 identifier = fnScope.declareIdentifier(symbol,token);
 911                 if (symbol == "$super" && argpos == 0) {
 912                     // Exception for Prototype 1.6...
 913                     identifier.preventMunging();
 914                 }
 915                 //argpos++;
 916             }
 917         }
 918
 919         token = this.ts.nextTok();
 920         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 921         //Seed.quit();
 922         //print(token.toString());
 923         // assert token.getType() == Token.LC;
 924         //this.braceNesting++;
 925
 926         //token = this.ts.nextTok();
 927         //print(token.toString());
 928         var outTS = this.ts;
 929         var _this = this;
 930         token.items.forEach(function(tar) {
 931             _this.ts = new TokenStream(tar);
 932             _this.parseScope(fnScope);
 933
 934
 935         });
 936
 937         //print(JSON.stringify(this.ts,null,4));
 938         //this.parseScope(fnScope);
 939         this.ts = outTS;
 940         // now pop it off the stack!!!
 941
 942         //this.braceNesting = b4braceNesting;
 943         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 944         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 945         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 946     },
 947
 948     protectScopeFromObfuscation : function(scope) {
 949             //assert scope != null;
 950
 951         if (scope == this.globalScope) {
 952             // The global scope does not get obfuscated,
 953             // so we don't need to worry about it...
 954             return;
 955         }
 956
 957         // Find the highest local scope containing the specified scope.
 958         while (scope && scope.parent != this.globalScope) {
 959             scope = scope.parent;
 960         }
 961
 962         //assert scope.getParentScope() == globalScope;
 963         scope.preventMunging();
 964     },
 965
 966     getIdentifier: function(symbol, scope, token) {
 967         var identifier;
 968         while (scope != false) {
 969             identifier = scope.getIdentifier(symbol, token);
 970             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 971             if (identifier) {
 972                 return identifier;
 973             }
 974             scope = scope.parent;
 975         }
 976         return false;
 977     }
 978 };