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