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

   1 //<Script type="text/javascript">
   2
   3 Scope = imports['JSDOC/Scope.js'].Scope;
   4
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 */
  10
  11 ScopeParser = function(ts) {
  12     this.ts = ts; // {TokenStream}
  13     this.warnings = [];
  14     this.scopes = [];
  15     this.indexedScopes = {};
  16     this.timer = new Date() * 1;
  17     this.debug = false;
  18 }
  19
  20 // list of keywords that should not be used in object literals.
  21 ScopeParser.idents = [
  22         "break",
  23         "case",
  24         "continue",
  25         "default",
  26         "delete",
  27         "do",
  28         "else",
  29         "export",
  30         "false",
  31         "for",
  32         "function",
  33         "if",
  34         "import",
  35         "in",
  36         "new",
  37         "null",
  38         "return",
  39         "switch",
  40         "this",
  41         "true",
  42         "typeof",
  43         "var",
  44         "void",
  45         "while",
  46         "with",
  47
  48         "catch",
  49         "class",
  50         "const",
  51         "debugger",
  52         "enum",
  53         "extends",
  54         "finally",
  55         "super",
  56         "throw",
  57         "try",
  58
  59         "abstract",
  60         "boolean",
  61         "byte",
  62         "char",
  63         "double",
  64         "final",
  65         "float",
  66         "goto",
  67         "implements",
  68         "instanceof",
  69         "int",
  70         "interface",
  71         "long",
  72         "native",
  73         "package",
  74         "private",
  75         "protected",
  76         "public",
  77         "short",
  78         "static",
  79         "synchronized",
  80         "throws",
  81         "transient",
  82                 "include",
  83                 "undefined"
  84 ];
  85
  86
  87 ScopeParser.prototype = {
  88     timer: 0,
  89     timerPrint: function (str) {
  90         var ntime = new Date() * 1;
  91         var tdif =  ntime -this.timer;
  92         this.timer = ntime;
  93         var pref = '';
  94         if (tdif > 100) { //slower ones..
  95             pref = '***';
  96         }
  97         println(pref+'['+tdif+']'+str);
  98
  99     },
 100     warn: function(s) {
 101         print('****************' + s);
 102         this.warnings.push(s);
 103         //println("WARNING:" + htmlescape(s) + "<BR>");
 104     },
 105     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 106     warnings : false,
 107     ts : false,
 108     scopes : false,
 109     global : false,
 110     mode : "", //"BUILDING_SYMBOL_TREE",
 111     braceNesting : 0,
 112     indexedScopes : false,
 113     munge: true,
 114
 115
 116
 117
 118
 119     buildSymbolTree : function()
 120     {
 121         //println("<PRE>");
 122
 123         this.ts.rewind();
 124         this.braceNesting = 0;
 125         this.scopes = [];
 126
 127
 128
 129
 130         this.globalScope = new  Scope(-1, false, -1, '');
 131         indexedScopes = { 0 : this.globalScope };
 132
 133         this.mode = 'BUILDING_SYMBOL_TREE';
 134         this.parseScope(this.globalScope);
 135     },
 136     mungeSymboltree : function()
 137     {
 138
 139         if (!this.munge) {
 140             return;
 141         }
 142
 143         // One problem with obfuscation resides in the use of undeclared
 144         // and un-namespaced global symbols that are 3 characters or less
 145         // in length. Here is an example:
 146         //
 147         //     var declaredGlobalVar;
 148         //
 149         //     function declaredGlobalFn() {
 150         //         var localvar;
 151         //         localvar = abc; // abc is an undeclared global symbol
 152         //     }
 153         //
 154         // In the example above, there is a slim chance that localvar may be
 155         // munged to 'abc', conflicting with the undeclared global symbol
 156         // abc, creating a potential bug. The following code detects such
 157         // global symbols. This must be done AFTER the entire file has been
 158         // parsed, and BEFORE munging the symbol tree. Note that declaring
 159         // extra symbols in the global scope won't hurt.
 160         //
 161         // Note: Since we go through all the tokens to do this, we also use
 162         // the opportunity to count how many times each identifier is used.
 163
 164         this.ts.rewind();
 165         this.braceNesting = 0;
 166         this.scopes= [];
 167         this.mode = 'PASS2_SYMBOL_TREE';
 168
 169         //println("MUNGING?");
 170
 171         this.parseScope(this.globalScope);
 172         this.globalScope.munge();
 173     },
 174
 175
 176     log : function(str)
 177     {
 178           //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 179     },
 180     logR : function(str)
 181     {
 182             //println("<B>LOG:</B>" + str + "<BR/>");
 183     },
 184
 185
 186
 187
 188
 189
 190     parseScope : function(scope) // parse a token stream..
 191     {
 192         //this.timerPrint("parseScope EnterScope");
 193         print(">>> ENTER SCOPE" + this.scopes.length);
 194         var symbol;
 195         var token;
 196
 197         var identifier;
 198
 199         var expressionBraceNesting = this.braceNesting;
 200         var bracketNesting = 0;
 201         var parensNesting = 0;
 202
 203         var isObjectLitAr = [ false ];
 204         var isInObjectLitAr;
 205         this.scopes.push(scope);
 206         token = this.ts.lookTok(1);
 207         while (token) {
 208           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 209
 210             !this.debug|| print(token.type + '.' + token.name+ ":" + token.data);
 211             switch(token.type + '.' + token.name) {
 212                 case "KEYW.VAR":
 213                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 214
 215                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 216                     while (true) {
 217                         token = this.ts.nextTok();
 218                         !this.debug|| print( token.toString());
 219
 220                         if (!token) { // can return false at EOF!
 221                             break;
 222                         }
 223                         if (token.name == "VAR") { // kludge..
 224                             continue;
 225                         }
 226                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 227                         if (token.type !="NAME") {
 228                             print(token.toString());
 229                             print( "var without ident");
 230                             Seed.quit()
 231                         }
 232
 233
 234                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 235                             identifier = scope.getIdentifier(token.data) ;
 236
 237                             if (identifier == false) {
 238                                 scope.declareIdentifier(token.data, token);
 239                             } else {
 240                                 token.identifier = identifier;
 241                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 242                             }
 243                         }
 244
 245                         token = this.ts.nextTok();
 246                         !this.debug|| print(token.toString());
 247                         /*
 248                         assert token.getType() == Token.SEMI ||
 249                                 token.getType() == Token.ASSIGN ||
 250                                 token.getType() == Token.COMMA ||
 251                                 token.getType() == Token.IN;
 252                         */
 253                         if (token.name == "IN") {
 254                             break;
 255                         } else {
 256                             this.parseExpression();
 257                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 258
 259                             token = this.ts.lookTok(1);
 260                             !this.debug|| print("AFTER EXP: " + token.toString());
 261                             if (token.data == ';') {
 262                                 break;
 263                             }
 264                         }
 265                     }
 266                     break;
 267                 case "KEYW.FUNCTION":
 268                     //println("<i>"+token.data+"</i>");
 269                     this.parseFunctionDeclaration();
 270                     break;
 271
 272                 case "PUNC.LEFT_CURLY": // {
 273                     //println("<i>"+token.data+"</i>");
 274                     isObjectLitAr.push(false);
 275                     print(">>>>>> OBJLIT PUSH(false)");
 276                     this.braceNesting++;
 277                     break;
 278
 279                 case "PUNC.RIGHT_CURLY": // }
 280                     //println("<i>"+token.data+"</i>");
 281                     this.braceNesting--;
 282                     isObjectLitAr.pop();
 283                     print(">>>>>> OBJLIT POP(false)");
 284                         //assert braceNesting >= scope.getBraceNesting();
 285                     print("compare BN : "+ this.braceNesting +" ?=" +  scope.braceNesting);
 286                     if (this.braceNesting == scope.braceNesting) {
 287                         var ls = this.scopes.pop();
 288                         ls.getUsedSymbols();
 289                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 290                         return;
 291                     }
 292                     break;
 293
 294                 case "KEYW.WITH":
 295                     //println("<i>"+token.data+"</i>");
 296                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 297                         // Inside a 'with' block, it is impossible to figure out
 298                         // statically whether a symbol is a local variable or an
 299                         // object member. As a consequence, the only thing we can
 300                         // do is turn the obfuscation off for the highest scope
 301                         // containing the 'with' block.
 302                         this.protectScopeFromObfuscation(scope);
 303                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 304                     }
 305                     break;
 306
 307                 case "KEYW.CATCH":
 308                     //println("<i>"+token.data+"</i>");
 309                     this.parseCatch();
 310                     break;
 311                 /*
 312                 case Token.SPECIALCOMMENT:
 313                         if (mode == BUILDING_SYMBOL_TREE) {
 314                             protectScopeFromObfuscation(scope);
 315                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 316                         }
 317                         break;
 318                 */
 319
 320                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 321                 case "STRN.SINGLE_QUOTE":
 322                     //println("<i>"+token.data+"</i>");
 323                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 324                         // then we are in an object lit.. -> we need to flag the brace as such...
 325                         isObjectLitAr.pop();
 326                         isObjectLitAr.push(true);
 327                         print(">>>>>> OBJLIT PUSH(true)");
 328                     }
 329                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 330
 331                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 332                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 333                         // see if we can replace..
 334                         // remove the quotes..
 335                         // should do a bit more checking!!!! (what about wierd char's in the string..
 336                         var str = token.data.substring(1,token.data.length-1);
 337                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 338                             token.outData = str;
 339                         }
 340
 341
 342
 343                     }
 344
 345
 346
 347                     break;
 348
 349                 case "NAME.NAME":
 350
 351                     //print("DEAL WITH NAME:");
 352                     // got identifier..
 353
 354                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 355                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 356                         isObjectLitAr.pop();
 357                         isObjectLitAr.push(true);
 358                         print(">>>>>> OBJLIT PUSH(true)");
 359                         //println("<i>"+token.data+"</i>");
 360                         break;
 361                     }
 362                    // print("DEAL WITH obj lit:");
 363                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 364
 365                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 366                         // skip, it's an object lit key..
 367                         //println("<i>"+token.data+"</i>");
 368                         break;
 369                     }
 370
 371
 372                     // skip anyting with "." before it..!!
 373
 374                     if (this.ts.lookTok(-1).data == ".") {
 375                         // skip, it's an object prop.
 376                         //println("<i>"+token.data+"</i>");
 377                         break;
 378                     }
 379                     symbol = token.data;
 380                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 381
 382                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 383
 384                         //print ("MUNGE?" + symbol);
 385
 386                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 387
 388                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 389                         identifier = this.getIdentifier(symbol, scope);
 390
 391                         if (identifier == false) {
 392 // BUG!find out where builtin is defined...
 393                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 394                                 // Here, we found an undeclared and un-namespaced symbol that is
 395                                 // 3 characters or less in length. Declare it in the global scope.
 396                                 // We don't need to declare longer symbols since they won't cause
 397                                 // any conflict with other munged symbols.
 398                                 this.globalScope.declareIdentifier(symbol, token);
 399                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 400                             }
 401
 402                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 403                         } else {
 404                             token.identifier = identifier;
 405                             identifier.refcount++;
 406                         }
 407                     }
 408
 409                     break;
 410                     //println("<B>SID</B>");
 411                 default:
 412                     if (token.type != 'KEYW') {
 413                         break;
 414                     }
 415                    // print("Check eval:");
 416
 417                     symbol = token.data;
 418
 419                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 420
 421                         if (symbol == "eval") {
 422                             // look back one and see if we can find a comment!!!
 423                             if (this.ts.look(-1).type == "COMM") {
 424                                 // look for eval:var:noreplace\n
 425                                 var _t = this;
 426                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 427
 428                                     var hi = _t.getIdentifier(a, scope);
 429                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 430                                     if (hi) {
 431                                      //   println("PROTECT "+a+" from munge");
 432                                         hi.toMunge = false;
 433                                     }
 434
 435                                 });
 436
 437
 438                             } else {
 439
 440
 441                                 this.protectScopeFromObfuscation(scope);
 442                                 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);
 443                             }
 444
 445                         }
 446
 447                     }
 448                     break;
 449
 450
 451             } // end switch
 452
 453
 454             //this.timerPrint("parseScope TOK : " + token.toString());
 455             token = this.ts.nextTok();
 456             //if (this.ts.nextT()) break;
 457
 458         }
 459         print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 460     },
 461
 462
 463     parseExpression : function() {
 464
 465         // Parse the expression until we encounter a comma or a semi-colon
 466         // in the same brace nesting, bracket nesting and paren nesting.
 467         // Parse functions if any...
 468         //println("<i>EXP</i><BR/>");
 469         !this.debug || print("PARSE EXPR");
 470         var symbol;
 471         var token;
 472         var currentScope;
 473         var identifier;
 474
 475         var expressionBraceNesting = this.braceNesting;
 476         var bracketNesting = 0;
 477         var parensNesting = 0;
 478         var isInObjectLitAr;
 479         var isObjectLitAr = [ false ];
 480         while (token = this.ts.lookTok()) {
 481
 482
 483
 484             currentScope = this.scopes[this.scopes.length-1];
 485
 486             //println("<i>"+token.data+"</i>");
 487             !this.debug|| print ("EXP" + token.toString());
 488             switch (token.type) {
 489                 case 'PUNC':
 490                     switch(token.data) {
 491
 492                         case ';':
 493                         case ',':
 494                             if (this.braceNesting == expressionBraceNesting &&
 495                                     bracketNesting == 0 &&
 496                                     parensNesting == 0) {
 497
 498                                 return;
 499                             }
 500                             break;
 501
 502
 503
 504                         case '{': //Token.LC:
 505                             isObjectLitAr.push(false);
 506                             print(">>>>> OBJ PUSH(false)");
 507                             this.braceNesting++;
 508                             break;
 509
 510                         case '}': //Token.RC:
 511                             this.braceNesting--;
 512                             isObjectLitAr.pop();
 513                             print(">>>>> OBJ POP");
 514                            // assert braceNesting >= expressionBraceNesting;
 515                             break;
 516
 517                         case '[': //Token.LB:
 518                             bracketNesting++;
 519                             break;
 520
 521                         case ']': //Token.RB:
 522                             bracketNesting--;
 523                             break;
 524
 525                         case '(': //Token.LP:
 526                             parensNesting++;
 527                             break;
 528
 529                         case ')': //Token.RP:
 530                             parensNesting--;
 531                             break;
 532                     }
 533                     break;
 534
 535                 case 'STRN': // used for object lit detection..
 536                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 537                         // then we are in an object lit.. -> we need to flag the brace as such...
 538                         isObjectLitAr.pop();
 539                         isObjectLitAr.push(true);
 540                         print(">>>>> OBJ PUSH(true)");
 541                     }
 542
 543
 544
 545                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 546                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 547                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 548                         // see if we can replace..
 549                         // remove the quotes..
 550                         var str = token.data.substring(1,token.data.length-1);
 551                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 552                             token.outData = str;
 553                         }
 554
 555
 556
 557                     }
 558
 559                     break;
 560
 561
 562
 563                 case 'NAME':
 564
 565                     symbol = token.data;
 566                     if (this.ts.lookTok(-1).data == "{"  && this.ts.lookTok(1).data == ":") {
 567                         // then we are in an object lit.. -> we need to flag the brace as such...
 568                         isObjectLitAr.pop();
 569                         isObjectLitAr.push(true);
 570                          print(">>>>> OBJ PUSH(true)");
 571                         break;
 572                     }
 573                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 574                     if (isInObjectLitAr && this.ts.lookTok(-1).data == "," && this.ts.lookTok(1).data == ":") {
 575                         break;
 576                     }
 577
 578                     if (this.ts.lookTok(-1).data == ".") {
 579                         //skip '.'
 580                         break;
 581                     }
 582
 583                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 584
 585                         identifier = this.getIdentifier(symbol, currentScope);
 586                         //println("<B>??</B>");
 587                         if (identifier == false) {
 588
 589                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 590                                 // Here, we found an undeclared and un-namespaced symbol that is
 591                                 // 3 characters or less in length. Declare it in the global scope.
 592                                 // We don't need to declare longer symbols since they won't cause
 593                                 // any conflict with other munged symbols.
 594                                 this.globalScope.declareIdentifier(symbol, token);
 595                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 596                             } else {
 597                                 //println("undeclared")
 598                             }
 599
 600
 601                         } else {
 602                             //println("<B>++</B>");
 603                             token.identifier = identifier;
 604                             identifier.refcount++;
 605                         }
 606
 607                     }
 608                     break;
 609
 610
 611
 612
 613                     //println("<B>EID</B>");
 614                  case 'KEYW':
 615
 616                     if (token.name == "FUNCTION") {
 617
 618                         this.parseFunctionDeclaration();
 619                         break;
 620                     }
 621
 622
 623
 624                     symbol = token.data;
 625                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 626
 627                         if (symbol == "eval") {
 628                             if (this.ts.look(-1).type == 'COMM') {
 629                                 // look for eval:var:noreplace\n
 630                                 var _t = this;
 631                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 632                                     var hi = _t.getIdentifier(a, currentScope);
 633                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 634                                     if (hi) {
 635                                       //  println("PROTECT "+a+" from munge");
 636                                         hi.toMunge = false;
 637                                     }
 638
 639
 640                                 });
 641
 642                             } else {
 643                                 this.protectScopeFromObfuscation(currentScope);
 644                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 645                             }
 646
 647
 648                         }
 649                         break;
 650                     }
 651
 652             }
 653             if (!this.ts.nextTok()) break;
 654         }
 655     },
 656
 657
 658     parseCatch : function() {
 659
 660         var symbol;
 661         var token;
 662         var currentScope;
 663         var identifier;
 664
 665         //token = getToken(-1);
 666         //assert token.getType() == Token.CATCH;
 667         token = this.ts.nextTok();
 668         //assert token.getType() == Token.LP; (
 669         token = this.ts.nextTok();
 670         //assert token.getType() == Token.NAME;
 671
 672         symbol = token.data;
 673         currentScope = this.scopes[this.scopes.length-1];
 674
 675         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 676             // We must declare the exception identifier in the containing function
 677             // scope to avoid errors related to the obfuscation process. No need to
 678             // display a warning if the symbol was already declared here...
 679             currentScope.declareIdentifier(symbol, token);
 680         } else {
 681             //?? why inc the refcount?? - that should be set when building the tree???
 682             identifier = this.getIdentifier(symbol, currentScope);
 683             identifier.refcount++;
 684         }
 685
 686         token = this.ts.nextTok();
 687         //assert token.getType() == Token.RP; // )
 688     },
 689
 690     parseFunctionDeclaration : function()
 691     {
 692        // print("PARSE FUNCTION");
 693         var symbol;
 694         var token;
 695         var currentScope  = false;
 696         var fnScope = false;
 697         var identifier;
 698         //this.logR("<B>PARSING FUNCTION</B>");
 699         currentScope = this.scopes[this.scopes.length-1];
 700
 701         token = this.ts.nextTok();
 702         if (token.type == "NAME") {
 703             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 704                 // Get the name of the function and declare it in the current scope.
 705                 symbol = token.data;
 706                 if (currentScope.getIdentifier(symbol) != false) {
 707                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 708                 }
 709                 currentScope.declareIdentifier(symbol,token);
 710             }
 711             token =  this.ts.nextTok();
 712         }
 713
 714         //assert token.getType() == Token.LP;
 715         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 716             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 717
 718             //println("STORING SCOPE" + this.ts.cursor);
 719
 720             this.indexedScopes[this.ts.cursor] = fnScope;
 721
 722         } else {
 723             //println("FETCHING SCOPE" + this.ts.cursor);
 724             fnScope = this.indexedScopes[this.ts.cursor];
 725
 726         }
 727
 728         // Parse function arguments.
 729         var argpos = 0;
 730         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 731             token = this.ts.nextTok();
 732            // print ("FUNC ARGS: " + token.toString())
 733             //assert token.getType() == Token.NAME ||
 734             //        token.getType() == Token.COMMA;
 735             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 736                 symbol = token.data;
 737                 identifier = fnScope.declareIdentifier(symbol,token);
 738                 if (symbol == "$super" && argpos == 0) {
 739                     // Exception for Prototype 1.6...
 740                     identifier.preventMunging();
 741                 }
 742                 argpos++;
 743             }
 744         }
 745
 746         token = this.ts.nextTok();
 747         // assert token.getType() == Token.LC;
 748         this.braceNesting++;
 749
 750         token = this.ts.nextTok();
 751         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 752             /*
 753
 754             NOT SUPPORTED YET!?!!?!
 755
 756             // This is a hint. Hints are empty statements that look like
 757             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 758             // to prevent specific symbols from getting obfuscated (some heretic
 759             // implementations, such as Prototype 1.6, require specific variable
 760             // names, such as $super for example, in order to work appropriately.
 761             // Note: right now, only "nomunge" is supported in the right hand side
 762             // of a hint. However, in the future, the right hand side may contain
 763             // other values.
 764             consumeToken();
 765             String hints = token.getValue();
 766             // Remove the leading and trailing quotes...
 767             hints = hints.substring(1, hints.length() - 1).trim();
 768             StringTokenizer st1 = new StringTokenizer(hints, ",");
 769             while (st1.hasMoreTokens()) {
 770                 String hint = st1.nextToken();
 771                 int idx = hint.indexOf(':');
 772                 if (idx <= 0 || idx >= hint.length() - 1) {
 773                     if (mode == BUILDING_SYMBOL_TREE) {
 774                         // No need to report the error twice, hence the test...
 775                         this.warn("Invalid hint syntax: " + hint, true);
 776                     }
 777                     break;
 778                 }
 779                 String variableName = hint.substring(0, idx).trim();
 780                 String variableType = hint.substring(idx + 1).trim();
 781                 if (mode == BUILDING_SYMBOL_TREE) {
 782                     fnScope.addHint(variableName, variableType);
 783                 } else if (mode == CHECKING_SYMBOL_TREE) {
 784                     identifier = fnScope.getIdentifier(variableName);
 785                     if (identifier != null) {
 786                         if (variableType.equals("nomunge")) {
 787                             identifier.preventMunging();
 788                         } else {
 789                             this.warn("Unsupported hint value: " + hint, true);
 790                         }
 791                     } else {
 792                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 793                     }
 794                 }
 795             }
 796             */
 797         }
 798
 799         this.parseScope(fnScope);
 800         // now pop it off the stack!!!
 801
 802
 803
 804     },
 805
 806     protectScopeFromObfuscation : function(scope) {
 807             //assert scope != null;
 808
 809         if (scope == this.globalScope) {
 810             // The global scope does not get obfuscated,
 811             // so we don't need to worry about it...
 812             return;
 813         }
 814
 815         // Find the highest local scope containing the specified scope.
 816         while (scope && scope.parent != this.globalScope) {
 817             scope = scope.parent;
 818         }
 819
 820         //assert scope.getParentScope() == globalScope;
 821         scope.preventMunging();
 822     },
 823
 824     getIdentifier: function(symbol, scope) {
 825         var identifier;
 826         while (scope != false) {
 827             identifier = scope.getIdentifier(symbol);
 828             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 829             if (identifier) {
 830                 return identifier;
 831             }
 832             scope = scope.parent;
 833         }
 834         return false;
 835     }
 836 };