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

   1
   2
   3
   4 namespace JSDOC {
   5
   6         public enum ScopeParserMode {
   7                 BUILDING_SYMBOL_TREE,
   8                 PASS2_SYMBOL_TREE
   9         }
  10
  11
  12         public class ScopeParser : Object {
  13
  14         TokenStream ts;
  15         Gee.ArrayList<string> warnings;
  16
  17         bool debug = false;
  18         string[] idents;
  19
  20
  21     Scope global ;
  22     ScopeParserMode mode;
  23     //braceNesting : 0,
  24     Gee.HashMap<int,Scope> indexedScopes;
  25     bool munge =  true;
  26
  27
  28
  29         public ScopeParser(TokenStream ts) {
  30                 this.ts = ts; // {TokenStream}
  31                 this.warnings = new Gee.ArrayList<string>();
  32                 this.globalScope = new  Scope(-1, false, -1, '');
  33                 this.indexedScopes = new Gee.HashMap<int,Scope>();
  34
  35                 //this.indexedg = {};
  36                 //this.timer = new Date() * 1;
  37                 this.idents = {
  38
  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
 105
 106
 107     void warn(string s)
 108     {
 109         //print('****************' + s);
 110         this.warnings.add(s);
 111         //println("WARNING:" + htmlescape(s) + "<BR>");
 112     }
 113
 114
 115     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 116
 117
 118
 119
 120
 121
 122     void buildSymbolTree()
 123     {
 124         //println("<PRE>");
 125
 126         this.ts.rewind();
 127         this.braceNesting = 0;
 128
 129        // print(JSON.stringify(this.ts.tokens, null,4));
 130
 131
 132         this.globalScope = new  Scope(-1, false, -1, '');
 133         this.indexedScopes = new Gee.HashMap<int,Scope>();
 134         this.indexedScopes.set(0, this.globalScope );
 135
 136         this.mode = ScopeParserMode.BUILDING_SYMBOL_TREE;
 137
 138         this.parseScope(this.globalScope);
 139
 140         //print("---------------END PASS 1 ---------------- ");
 141
 142     }
 143
 144     void mungeSymboltree()
 145     {
 146
 147         if (!this.munge) {
 148             return;
 149         }
 150
 151         // One problem with obfuscation resides in the use of undeclared
 152         // and un-namespaced global symbols that are 3 characters or less
 153         // in length. Here is an example:
 154         //
 155         //     var declaredGlobalVar;
 156         //
 157         //     function declaredGlobalFn() {
 158         //         var localvar;
 159         //         localvar = abc; // abc is an undeclared global symbol
 160         //     }
 161         //
 162         // In the example above, there is a slim chance that localvar may be
 163         // munged to 'abc', conflicting with the undeclared global symbol
 164         // abc, creating a potential bug. The following code detects such
 165         // global symbols. This must be done AFTER the entire file has been
 166         // parsed, and BEFORE munging the symbol tree. Note that declaring
 167         // extra symbols in the global scope won't hurt.
 168         //
 169         // Note: Since we go through all the tokens to do this, we also use
 170         // the opportunity to count how many times each identifier is used.
 171
 172         this.ts.rewind();
 173         this.braceNesting = 0;
 174         this.mode = ScopeParserMode.PASS2_SYMBOL_TREE;
 175
 176         //println("MUNGING?");
 177
 178         this.parseScope(this.globalScope);
 179
 180         //this.globalScope.dump();
 181
 182
 183         this.globalScope.munge();
 184     }
 185
 186
 187     void log(string str)
 188     {
 189         print(str);
 190         //print ("                    ".substring(0, this.braceNesting*2) + str);
 191
 192         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 193     }
 194     void logR (string str)
 195     {
 196             //println("<B>LOG:</B>" + str + "<BR/>");
 197     }
 198
 199
 200
 201
 202
 203     void parseScope(Scope scope) // parse a token stream..
 204     {
 205         //this.timerPrint("parseScope EnterScope");
 206         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 207
 208         var expressionBraceNesting = this.braceNesting + 0;
 209
 210         var parensNesting = 0;
 211
 212         var isObjectLitAr = new Gee.ArrayList<bool>();
 213         isObjectLitAr.add(false);
 214
 215
 216
 217         //var scopeIndent = '';
 218         //this.scopes.forEach(function() {
 219         //    scopeIndent += '   ';
 220         //});
 221         //print(">> ENTER SCOPE");
 222
 223
 224
 225
 226         var token = this.ts.lookTok(1);
 227         while (token != null) {
 228           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 229             //this.dumpToken(token , this.scopes, this.braceNesting);
 230             //print('SCOPE:' + token.toString());
 231             //this.log(token.data);
 232             //if (token.type == 'NAME') {
 233             //    print('*' + token.data);
 234             //}
 235             switch(token.type + '.' + token.name) {
 236                 case "KEYW.VAR":
 237                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 238                     //print('SCOPE-VAR:' + token.toString());
 239                     var vstart = this.ts.cursor +1;
 240
 241                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 242                     while (true) {
 243                         token = this.ts.nextTok();
 244                         //!this.debug|| print( token.toString());
 245                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 246                         if (token == null) { // can return false at EOF!
 247                             break;
 248                         }
 249                         if (token.name == "VAR" || token.data == ',') { // kludge..
 250                             continue;
 251                         }
 252                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 253                         if (token.type != "NAME") {
 254                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 255                                 print(this.ts.tokens[i].toString());
 256                             }
 257
 258                             print( "var without ident");
 259                             Seed.quit()
 260                         }
 261
 262
 263                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 264                             identifier = scope.getIdentifier(token.data,token) ;
 265
 266                             if (identifier == false) {
 267                                 scope.declareIdentifier(token.data, token);
 268                             } else {
 269                                 token.identifier = identifier;
 270                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 271                             }
 272                         }
 273
 274                         token = this.ts.nextTok();
 275                         !this.debug|| print(token.toString());
 276                         /*
 277                         assert token.getType() == Token.SEMI ||
 278                                 token.getType() == Token.ASSIGN ||
 279                                 token.getType() == Token.COMMA ||
 280                                 token.getType() == Token.IN;
 281                         */
 282                         if (token.name == "IN") {
 283                             break;
 284                         } else {
 285                             //var bn = this.braceNesting;
 286                             var bn = this.braceNesting;
 287                             var nts = [];
 288                             while (true) {
 289                                 if (!token || token.type == 'VOID' || token.data == ',') {
 290                                     break;
 291                                 }
 292                                 nts.push(token);
 293                                 token = this.ts.nextTok();
 294                             }
 295                             if (nts.length) {
 296                                 var TS = this.ts;
 297                                 this.ts = new TokenStream(nts);
 298                                 this.parseExpression(scope);
 299                                 this.ts = TS;
 300                             }
 301
 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||
 308                            // print("AFTER EXP: " + token.toString());
 309                             if (token.data == ';') {
 310                                 break;
 311                             }
 312                         }
 313                     }
 314
 315                     //print("VAR:")
 316                     //this.ts.dump(vstart , this.ts.cursor);
 317
 318                     break;
 319
 320
 321                 case "KEYW.FUNCTION":
 322                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 323                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 324                     //println("<i>"+token.data+"</i>");
 325                      var bn = this.braceNesting;
 326                     this.parseFunctionDeclaration(scope);
 327                      this.braceNesting = bn;
 328                     break;
 329
 330                 case "PUNC.LEFT_CURLY": // {
 331                 case "PUNC.LEFT_PAREN": // (
 332                 case "PUNC.LEFT_BRACE": // [
 333                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 334                     //println("<i>"+token.data+"</i>");
 335                     var curTS = this.ts;
 336                     if (token.props) {
 337
 338                         // { a : ... , c : .... }
 339
 340                         for (var prop in token.props) {
 341
 342
 343                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 344                             if (token.props[prop].val[0].data == 'function') {
 345                                 // parse a function..
 346                                 this.ts = new TokenStream(token.props[prop].val);
 347                                 this.ts.nextTok();
 348                                 this.parseFunctionDeclaration(scope);
 349
 350                                 continue;
 351                             }
 352                             // key value..
 353
 354                             this.ts = new TokenStream(token.props[prop].val);
 355                             this.parseExpression(scope);
 356
 357                         }
 358                         this.ts = curTS;
 359
 360                         // it's an object literal..
 361                         // the values could be replaced..
 362                         break;
 363                     }
 364
 365                     // ( ... ) or { .... } not object literals..
 366
 367                     var _this = this;
 368                     for (var xx =0; xx < token.items.length; xx++) {
 369                                 expr = token.items[xx];
 370                     //token.items.forEach(function(expr) {
 371                             //print(expr.toString());
 372                            _this.ts = new TokenStream(expr);
 373                             //if (curTS.data == '(') {
 374                                 _this.parseScope(scope)
 375                             //} else {
 376                               //  _this.parseExpression(scope)
 377                             //}
 378
 379                     }
 380                     this.ts = curTS;
 381                     //print("NOT PROPS"); Seed.quit();
 382
 383                     //isObjectLitAr.push(false);
 384                     //this.braceNesting++;
 385
 386                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 387                     break;
 388
 389                 case "PUNC.RIGHT_CURLY": // }
 390                     //print("<< EXIT SCOPE");
 391                     return;
 392
 393                 case "KEYW.WITH":
 394                     //print('SCOPE-WITH:' + token.toString());
 395                     //println("<i>"+token.data+"</i>");
 396                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 397                         // Inside a 'with' block, it is impossible to figure out
 398                         // statically whether a symbol is a local variable or an
 399                         // object member. As a consequence, the only thing we can
 400                         // do is turn the obfuscation off for the highest scope
 401                         // containing the 'with' block.
 402                         this.protectScopeFromObfuscation(scope);
 403                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 404                     }
 405                     break;
 406
 407                 case "KEYW.CATCH":
 408                     //print('SCOPE-CATCH:' + token.toString());
 409                     //println("<i>"+token.data+"</i>");
 410                     this.parseCatch(scope);
 411                     break;
 412
 413                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 414                 case "STRN.SINGLE_QUOTE":
 415                   //  print('SCOPE-STRING:' + token.toString());
 416                     //println("<i>"+token.data+"</i>");
 417
 418                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 419                         // then we are in an object lit.. -> we need to flag the brace as such...
 420                         isObjectLitAr.pop();
 421                         isObjectLitAr.push(true);
 422                         //print(">>>>>> OBJLIT REPUSH(true)");
 423                     }
 424                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 425
 426                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 427                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 428                         // see if we can replace..
 429                         // remove the quotes..
 430                         // should do a bit more checking!!!! (what about wierd char's in the string..
 431                         var str = token.data.substring(1,token.data.length-1);
 432                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 433                             token.outData = str;
 434                         }
 435
 436
 437
 438                     }
 439
 440                     break;
 441
 442                 case "NAME.NAME":
 443                     //print('SCOPE-NAME:' + token.toString());
 444                     //print("DEAL WITH NAME:");
 445                     // got identifier..
 446                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 447                     // skip anyting with "." before it..!!
 448
 449                     if (this.ts.lookTok(-1).data == ".") {
 450                         // skip, it's an object prop.
 451                         //println("<i>"+token.data+"</i>");
 452                         break;
 453                     }
 454                     //print("SYMBOL: " + token.toString());
 455
 456                     symbol = token.data;
 457                     if (symbol == 'this') {
 458                         break;
 459                     }
 460                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 461
 462                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 463
 464                         //print ("MUNGE?" + symbol);
 465
 466                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 467
 468                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 469                         identifier = this.getIdentifier(symbol, scope, token);
 470
 471                         if (identifier == false) {
 472 // BUG!find out where builtin is defined...
 473                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 474                                 // Here, we found an undeclared and un-namespaced symbol that is
 475                                 // 3 characters or less in length. Declare it in the global scope.
 476                                 // We don't need to declare longer symbols since they won't cause
 477                                 // any conflict with other munged symbols.
 478                                 this.globalScope.declareIdentifier(symbol, token);
 479                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 480                             }
 481
 482                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 483                         } else {
 484                             token.identifier = identifier;
 485                             identifier.refcount++;
 486                         }
 487                     }
 488
 489                     break;
 490                     //println("<B>SID</B>");
 491                 default:
 492                     if (token.type != 'KEYW') {
 493                         break;
 494                     }
 495                     //print('SCOPE-KEYW:' + token.toString());
 496                    // print("Check eval:");
 497
 498                     symbol = token.data;
 499
 500                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 501
 502                         if (token.name == "EVAL") {
 503
 504                             //print(JSON.stringify(token, null,4));
 505                             // look back one and see if we can find a comment!!!
 506                             //if (this.ts.look(-1).type == "COMM") {
 507                             if (token.prefix && token.prefix.match(/eval/)) {
 508                                 // look for eval:var:noreplace\n
 509                                 //print("MATCH!?");
 510                                 var _t = this;
 511                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 512                                     //print("GOT: " + a);
 513                                     var hi = _t.getIdentifier(a, scope, token);
 514                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 515                                     if (hi) {
 516                                       //  print("PROTECT "+a+" from munge");
 517                                         //print(JSON.stringify(hi,null,4));
 518                                         hi.toMunge = false;
 519                                     }
 520
 521                                 });
 522
 523
 524                             } else {
 525
 526
 527                                 this.protectScopeFromObfuscation(scope);
 528                                 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);
 529                             }
 530
 531                         }
 532
 533                     }
 534                     break;
 535
 536
 537             } // end switch
 538
 539
 540             //print("parseScope TOK : " + token.toString());
 541             token = this.ts.nextTok();
 542             //if (this.ts.nextT()) break;
 543
 544         }
 545         //print("<<< EXIT SCOPE");
 546         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 547     },
 548
 549     expN : 0,
 550     parseExpression : function(scope) {
 551
 552         // Parse the expression until we encounter a comma or a semi-colon
 553         // in the same brace nesting, bracket nesting and paren nesting.
 554         // Parse functions if any...
 555         //println("<i>EXP</i><BR/>");
 556         !this.debug || print("PARSE EXPR");
 557         this.expN++;
 558
 559         // for printing stuff..
 560
 561
 562
 563         var symbol;
 564         var token;
 565
 566         var identifier;
 567
 568         var expressionBraceNesting = this.braceNesting + 0;
 569         var bracketNesting = 0;
 570         var parensNesting = 0;
 571         var isInObjectLitAr;
 572         var isObjectLitAr = [ false ];
 573
 574
 575
 576
 577         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 578         while ((token = this.ts.nextTok())) {
 579
 580
 581
 582            /*
 583             // moved out of loop?
 584            currentScope = this.scopes[this.scopes.length-1];
 585
 586             var scopeIndent = '';
 587             this.scopes.forEach(function() {
 588                 scopeIndent += '   ';
 589             });
 590            */
 591
 592            //this.dumpToken(token,  this.scopes, this.braceNesting );
 593             //print('EXPR' +  token.toString());
 594
 595
 596             //println("<i>"+token.data+"</i>");
 597             //this.log("EXP:" + token.data);
 598             switch (token.type) {
 599                 case 'PUNC':
 600                     //print("EXPR-PUNC:" + token.toString());
 601
 602                     switch(token.data) {
 603
 604                         case ';':
 605                             //print("<< EXIT EXPRESSION");
 606                             break;
 607
 608                         case ',':
 609
 610                             break;
 611
 612
 613                         case '(': //Token.LP:
 614                         case '{': //Token.LC:
 615                         case '[': //Token.LB:
 616                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 617                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 618                             //println("<i>"+token.data+"</i>");
 619                             var curTS = this.ts;
 620                             if (token.props) {
 621
 622                                 for (var prop in token.props) {
 623                                     if (!token.props[prop].val.length) {
 624                                         print(JSON.stringify(token.props, null,4));
 625                                     }
 626
 627                                     if (token.props[prop].val[0].data == 'function') {
 628                                         // parse a function..
 629                                         this.ts = new TokenStream(token.props[prop].val);
 630                                         this.ts.nextTok();
 631                                         this.parseFunctionDeclaration(scope);
 632                                         continue;
 633                                     }
 634                                     // key value..
 635
 636                                     this.ts = new TokenStream(token.props[prop].val);
 637                                     this.parseExpression(scope);
 638
 639                                 }
 640                                 this.ts = curTS;
 641
 642                                 // it's an object literal..
 643                                 // the values could be replaced..
 644                                 break;
 645                             }
 646
 647
 648                             var _this = this;
 649                             token.items.forEach(function(expr) {
 650                                   _this.ts = new TokenStream(expr);
 651                                   _this.parseExpression(scope)
 652                             });
 653                             this.ts = curTS;
 654
 655
 656
 657                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 658                             break;
 659
 660
 661
 662
 663
 664                         case ')': //Token.RP:
 665                         case ']': //Token.RB:
 666                         case '}': //Token.RB:
 667                             //print("<< EXIT EXPRESSION");
 668                             return;
 669
 670
 671
 672                             parensNesting++;
 673                             break;
 674
 675
 676
 677                     }
 678                     break;
 679
 680                 case 'STRN': // used for object lit detection..
 681                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 682                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 683
 684
 685                     break;
 686
 687
 688
 689                 case 'NAME':
 690                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 691
 692                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 693                     } else {
 694                         //print("EXPR-NAME:" + token.toString());
 695                     }
 696                     symbol = token.data;
 697                     //print("in NAME = " + token.toString());
 698                     //print("in NAME 0: " + this.ts.look(0).toString());
 699                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 700
 701                     //print(this.ts.lookTok(-1).data);
 702                     // prefixed with '.'
 703                     if (this.ts.lookTok(-1).data == ".") {
 704                         //skip '.'
 705                         break;
 706                     }
 707                     if (symbol == 'this') {
 708                         break;
 709                        }
 710
 711                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 712
 713                         identifier = this.getIdentifier(symbol, scope, token);
 714                         //println("<B>??</B>");
 715                         if (identifier == false) {
 716
 717                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 718                                 // Here, we found an undeclared and un-namespaced symbol that is
 719                                 // 3 characters or less in length. Declare it in the global scope.
 720                                 // We don't need to declare longer symbols since they won't cause
 721                                 // any conflict with other munged symbols.
 722                                 this.globalScope.declareIdentifier(symbol, token);
 723                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 724                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 725                                 //throw "OOPS";
 726                             } else {
 727                                 //print("undeclared:" + token.toString())
 728                             }
 729
 730
 731                         } else {
 732                             //println("<B>++</B>");
 733                             token.identifier = identifier;
 734                             identifier.refcount++;
 735                         }
 736
 737                     }
 738                     break;
 739
 740
 741
 742
 743                     //println("<B>EID</B>");
 744                 case 'KEYW':
 745                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 746                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 747
 748                     //print('EXPR-KEYW:' + token.toString());
 749                     if (token.name == "FUNCTION") {
 750
 751                         this.parseFunctionDeclaration(scope);
 752                         break;
 753                     }
 754
 755
 756                     symbol = token.data;
 757                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 758
 759                         if (token.name == "EVAL") {
 760                             //print(JSON.stringify(token,null,4));
 761                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 762                                 // look for eval:var:noreplace\n
 763                                // print("GOT MATCH?");
 764                                 var _t = this;
 765                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 766
 767                                     //print("PROTECT: " + a);
 768
 769
 770                                     var hi = _t.getIdentifier(a, scope, token);
 771                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 772                                     if (hi) {
 773                                       //  println("PROTECT "+a+" from munge");
 774                                         hi.toMunge = false;
 775                                     }
 776
 777
 778                                 });
 779
 780                             } else {
 781                                 this.protectScopeFromObfuscation(scope);
 782                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 783                             }
 784
 785
 786                         }
 787                         break;
 788                     }
 789                 default:
 790                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 791                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 792                     break;
 793             }
 794
 795         }
 796         //print("<< EXIT EXPRESSION");
 797         this.expN--;
 798     },
 799
 800
 801     parseCatch : function(scope) {
 802
 803         var symbol;
 804         var token;
 805
 806         var identifier;
 807
 808         //token = getToken(-1);
 809         //assert token.getType() == Token.CATCH;
 810         token = this.ts.nextTok(1);
 811         token = this.ts.nextTok(1);
 812
 813
 814         //print(JSON.stringify(this.ts,null,4));
 815         //assert token.getType() == Token.LP; (
 816         //token = this.ts.nextTok();
 817         //assert token.getType() == Token.NAME;
 818
 819         symbol = token.items[0][0].data;
 820
 821
 822         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 823             // We must declare the exception identifier in the containing function
 824             // scope to avoid errors related to the obfuscation process. No need to
 825             // display a warning if the symbol was already declared here...
 826             scope.declareIdentifier(symbol, token.items[0][0]);
 827         } else {
 828             //?? why inc the refcount?? - that should be set when building the tree???
 829             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 830             identifier.refcount++;
 831         }
 832
 833         //token = this.ts.nextTok();
 834         //assert token.getType() == Token.RP; // )
 835     },
 836
 837     parseFunctionDeclaration : function(scope)
 838     {
 839         //print("PARSE FUNCTION");
 840         var symbol;
 841         var token;
 842
 843         var fnScope = false;
 844         var identifier;
 845         var b4braceNesting = this.braceNesting + 0;
 846
 847         //this.logR("<B>PARSING FUNCTION</B>");
 848
 849
 850         token = this.ts.nextTok();
 851         if (token.type == "NAME") {
 852             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 853                 // Get the name of the function and declare it in the current scope.
 854                 symbol = token.data;
 855                 if (scope.getIdentifier(symbol,token) != false) {
 856                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 857                 }
 858                 scope.declareIdentifier(symbol,token);
 859             }
 860             token =  this.ts.nextTok();
 861         }
 862
 863
 864         // return function() {....
 865         while (token.data != "(") {
 866             //print(token.toString());
 867             token =  this.ts.nextTok();
 868
 869         }
 870
 871
 872         //assert token.getType() == Token.LP;
 873         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 874             fnScope = new Scope(1, scope, token.n, '', token);
 875
 876             //println("STORING SCOPE" + this.ts.cursor);
 877
 878             this.indexedScopes[token.id] = fnScope;
 879
 880         } else {
 881             //qln("FETCHING SCOPE" + this.ts.cursor);
 882             fnScope = this.indexedScopes[token.id];
 883         }
 884         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 885         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 886         // Parse function arguments.
 887         var args = token.items;
 888         for (var argpos =0; argpos < args.length; argpos++) {
 889
 890             token = args[argpos][0];
 891             //print ("FUNC ARGS: " + token.toString())
 892             //assert token.getType() == Token.NAME ||
 893             //        token.getType() == Token.COMMA;
 894             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 895                 symbol = token.data;
 896                 identifier = fnScope.declareIdentifier(symbol,token);
 897                 if (symbol == "$super" && argpos == 0) {
 898                     // Exception for Prototype 1.6...
 899                     identifier.preventMunging();
 900                 }
 901                 //argpos++;
 902             }
 903         }
 904
 905         token = this.ts.nextTok();
 906         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 907         //Seed.quit();
 908         //print(token.toString());
 909         // assert token.getType() == Token.LC;
 910         //this.braceNesting++;
 911
 912         //token = this.ts.nextTok();
 913         //print(token.toString());
 914         var outTS = this.ts;
 915         var _this = this;
 916         token.items.forEach(function(tar) {
 917             _this.ts = new TokenStream(tar);
 918             _this.parseScope(fnScope);
 919
 920
 921         });
 922
 923         //print(JSON.stringify(this.ts,null,4));
 924         //this.parseScope(fnScope);
 925         this.ts = outTS;
 926         // now pop it off the stack!!!
 927
 928         //this.braceNesting = b4braceNesting;
 929         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 930         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 931         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 932     },
 933
 934     protectScopeFromObfuscation : function(scope) {
 935             //assert scope != null;
 936
 937         if (scope == this.globalScope) {
 938             // The global scope does not get obfuscated,
 939             // so we don't need to worry about it...
 940             return;
 941         }
 942
 943         // Find the highest local scope containing the specified scope.
 944         while (scope && scope.parent != this.globalScope) {
 945             scope = scope.parent;
 946         }
 947
 948         //assert scope.getParentScope() == globalScope;
 949         scope.preventMunging();
 950     },
 951
 952     getIdentifier: function(symbol, scope, token) {
 953         var identifier;
 954         while (scope != false) {
 955             identifier = scope.getIdentifier(symbol, token);
 956             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 957             if (identifier) {
 958                 return identifier;
 959             }
 960             scope = scope.parent;
 961         }
 962         return false;
 963     }
 964 };