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