net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ASTVisitor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler;
  12
  13 import net.sourceforge.phpdt.core.compiler.*;
  14 import net.sourceforge.phpeclipse.internal.compiler.ast.*;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.*;
  16
  17 /**
  18  * A visitor for iterating through the parse tree.
  19  */
  20 public abstract class ASTVisitor {
  21
  22         public void acceptProblem(IProblem problem) {
  23                 // do nothing by default
  24         }
  25         public void endVisit(
  26                 AllocationExpression allocationExpression,
  27                 BlockScope scope) {
  28                 // do nothing by default
  29         }
  30         public void endVisit(AND_AND_Expression and_and_Expression, BlockScope scope) {
  31                 // do nothing by default
  32         }
  33 //      public void endVisit(JavadocArrayQualifiedTypeReference typeRef, BlockScope scope) {
  34 //              // do nothing by default
  35 //      }
  36 //      public void endVisit(JavadocArraySingleTypeReference typeRef, BlockScope scope) {
  37 //              // do nothing by default
  38 //      }
  39 //      public void endVisit(JavadocArgumentExpression expression, BlockScope scope) {
  40 //              // do nothing by default
  41 //      }
  42 //      public void endVisit(JavadocFieldReference fieldRef, BlockScope scope) {
  43 //              // do nothing by default
  44 //      }
  45 //      public void endVisit(JavadocMessageSend messageSend, BlockScope scope) {
  46 //              // do nothing by default
  47 //      }
  48 //      public void endVisit(JavadocQualifiedTypeReference typeRef, BlockScope scope) {
  49 //              // do nothing by default
  50 //      }
  51 //      public void endVisit(JavadocReturnStatement statement, BlockScope scope) {
  52 //              // do nothing by default
  53 //      }
  54 //      public void endVisit(JavadocSingleNameReference argument, BlockScope scope) {
  55 //              // do nothing by default
  56 //      }
  57 //      public void endVisit(JavadocSingleTypeReference typeRef, BlockScope scope) {
  58 //              // do nothing by default
  59 //      }
  60         public void endVisit(Argument argument, BlockScope scope) {
  61                 // do nothing by default
  62         }
  63         public void endVisit(
  64                 ArrayAllocationExpression arrayAllocationExpression,
  65                 BlockScope scope) {
  66                 // do nothing by default
  67         }
  68         public void endVisit(ArrayInitializer arrayInitializer, BlockScope scope) {
  69                 // do nothing by default
  70         }
  71         public void endVisit(
  72                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
  73                 BlockScope scope) {
  74                 // do nothing by default
  75         }
  76         public void endVisit(
  77                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
  78                 ClassScope scope) {
  79                 // do nothing by default
  80         }
  81         public void endVisit(ArrayReference arrayReference, BlockScope scope) {
  82                 // do nothing by default
  83         }
  84         public void endVisit(ArrayTypeReference arrayTypeReference, BlockScope scope) {
  85                 // do nothing by default
  86         }
  87         public void endVisit(ArrayTypeReference arrayTypeReference, ClassScope scope) {
  88                 // do nothing by default
  89         }
  90         public void endVisit(Assignment assignment, BlockScope scope) {
  91                 // do nothing by default
  92         }
  93         public void endVisit(AssertStatement assertStatement, BlockScope scope) {
  94                 // do nothing by default
  95         }
  96         public void endVisit(BinaryExpression binaryExpression, BlockScope scope) {
  97                 // do nothing by default
  98         }
  99         public void endVisit(Block block, BlockScope scope) {
 100                 // do nothing by default
 101         }
 102         public void endVisit(Break breakStatement, BlockScope scope) {
 103                 // do nothing by default
 104         }
 105         public void endVisit(Case caseStatement, BlockScope scope) {
 106                 // do nothing by default
 107         }
 108         public void endVisit(CastExpression castExpression, BlockScope scope) {
 109                 // do nothing by default
 110         }
 111         public void endVisit(CharLiteral charLiteral, BlockScope scope) {
 112                 // do nothing by default
 113         }
 114         public void endVisit(ClassLiteralAccess classLiteral, BlockScope scope) {
 115                 // do nothing by default
 116         }
 117         public void endVisit(Clinit clinit, ClassScope scope) {
 118                 // do nothing by default
 119         }
 120         public void endVisit(
 121                 CompilationUnitDeclaration compilationUnitDeclaration,
 122                 CompilationUnitScope scope) {
 123                 // do nothing by default
 124         }
 125         public void endVisit(CompoundAssignment compoundAssignment, BlockScope scope) {
 126                 // do nothing by default
 127         }
 128         public void endVisit(
 129                 ConditionalExpression conditionalExpression,
 130                 BlockScope scope) {
 131                 // do nothing by default
 132         }
 133         public void endVisit(
 134                 ConstructorDeclaration constructorDeclaration,
 135                 ClassScope scope) {
 136                 // do nothing by default
 137         }
 138         public void endVisit(Continue continueStatement, BlockScope scope) {
 139                 // do nothing by default
 140         }
 141         public void endVisit(DoStatement doStatement, BlockScope scope) {
 142                 // do nothing by default
 143         }
 144         public void endVisit(DoubleLiteral doubleLiteral, BlockScope scope) {
 145                 // do nothing by default
 146         }
 147         public void endVisit(EqualExpression equalExpression, BlockScope scope) {
 148                 // do nothing by default
 149         }
 150         public void endVisit(
 151                 ExplicitConstructorCall explicitConstructor,
 152                 BlockScope scope) {
 153                 // do nothing by default
 154         }
 155         public void endVisit(
 156                 ExtendedStringLiteral extendedStringLiteral,
 157                 BlockScope scope) {
 158                 // do nothing by default
 159         }
 160         public void endVisit(FalseLiteral falseLiteral, BlockScope scope) {
 161                 // do nothing by default
 162         }
 163         public void endVisit(FieldDeclaration fieldDeclaration, MethodScope scope) {
 164                 // do nothing by default
 165         }
 166         public void endVisit(FieldReference fieldReference, BlockScope scope) {
 167                 // do nothing by default
 168         }
 169         public void endVisit(FloatLiteral floatLiteral, BlockScope scope) {
 170                 // do nothing by default
 171         }
 172         public void endVisit(EmptyStatement emptyStatement, BlockScope scope) {
 173                 // do nothing by default
 174         }
 175         public void endVisit(ForStatement forStatement, BlockScope scope) {
 176                 // do nothing by default
 177         }
 178         public void endVisit(IfStatement ifStatement, BlockScope scope) {
 179                 // do nothing by default
 180         }
 181         public void endVisit(ImportReference importRef, CompilationUnitScope scope) {
 182                 // do nothing by default
 183         }
 184         public void endVisit(Initializer initializer, MethodScope scope) {
 185                 // do nothing by default
 186         }
 187         public void endVisit(
 188                 InstanceOfExpression instanceOfExpression,
 189                 BlockScope scope) {
 190                 // do nothing by default
 191         }
 192         public void endVisit(IntLiteral intLiteral, BlockScope scope) {
 193                 // do nothing by default
 194         }
 195         public void endVisit(LabeledStatement labeledStatement, BlockScope scope) {
 196                 // do nothing by default
 197         }
 198         public void endVisit(LocalDeclaration localDeclaration, BlockScope scope) {
 199                 // do nothing by default
 200         }
 201         public void endVisit(LongLiteral longLiteral, BlockScope scope) {
 202                 // do nothing by default
 203         }
 204         public void endVisit(MessageSend messageSend, BlockScope scope) {
 205                 // do nothing by default
 206         }
 207         public void endVisit(MethodDeclaration methodDeclaration, ClassScope scope) {
 208                 // do nothing by default
 209         }
 210 //      public void endVisit(StringLiteralConcatenation literal, BlockScope scope) {
 211 //              // do nothing by default
 212 //      }
 213         public void endVisit(NullLiteral nullLiteral, BlockScope scope) {
 214                 // do nothing by default
 215         }
 216         public void endVisit(OR_OR_Expression or_or_Expression, BlockScope scope) {
 217                 // do nothing by default
 218         }
 219         public void endVisit(PostfixExpression postfixExpression, BlockScope scope) {
 220                 // do nothing by default
 221         }
 222         public void endVisit(PrefixExpression prefixExpression, BlockScope scope) {
 223                 // do nothing by default
 224         }
 225         public void endVisit(
 226                 QualifiedAllocationExpression qualifiedAllocationExpression,
 227                 BlockScope scope) {
 228                 // do nothing by default
 229         }
 230         public void endVisit(
 231                 QualifiedNameReference qualifiedNameReference,
 232                 BlockScope scope) {
 233                 // do nothing by default
 234         }
 235         public void endVisit(
 236                 QualifiedSuperReference qualifiedSuperReference,
 237                 BlockScope scope) {
 238                 // do nothing by default
 239         }
 240         public void endVisit(
 241                 QualifiedThisReference qualifiedThisReference,
 242                 BlockScope scope) {
 243                 // do nothing by default
 244         }
 245         public void endVisit(
 246                 QualifiedTypeReference qualifiedTypeReference,
 247                 BlockScope scope) {
 248                 // do nothing by default
 249         }
 250         public void endVisit(
 251                 QualifiedTypeReference qualifiedTypeReference,
 252                 ClassScope scope) {
 253                 // do nothing by default
 254         }
 255         public void endVisit(ReturnStatement returnStatement, BlockScope scope) {
 256                 // do nothing by default
 257         }
 258         public void endVisit(
 259                 SingleNameReference singleNameReference,
 260                 BlockScope scope) {
 261                 // do nothing by default
 262         }
 263         public void endVisit(
 264                 SingleTypeReference singleTypeReference,
 265                 BlockScope scope) {
 266                 // do nothing by default
 267         }
 268         public void endVisit(
 269                 SingleTypeReference singleTypeReference,
 270                 ClassScope scope) {
 271                 // do nothing by default
 272         }
 273         public void endVisit(StringLiteral stringLiteral, BlockScope scope) {
 274                 // do nothing by default
 275         }
 276         public void endVisit(SuperReference superReference, BlockScope scope) {
 277                 // do nothing by default
 278         }
 279         public void endVisit(SwitchStatement switchStatement, BlockScope scope) {
 280                 // do nothing by default
 281         }
 282         public void endVisit(
 283                 SynchronizedStatement synchronizedStatement,
 284                 BlockScope scope) {
 285                 // do nothing by default
 286         }
 287         public void endVisit(ThisReference thisReference, BlockScope scope) {
 288                 // do nothing by default
 289         }
 290         public void endVisit(ThrowStatement throwStatement, BlockScope scope) {
 291                 // do nothing by default
 292         }
 293         public void endVisit(TrueLiteral trueLiteral, BlockScope scope) {
 294                 // do nothing by default
 295         }
 296         public void endVisit(TryStatement tryStatement, BlockScope scope) {
 297                 // do nothing by default
 298         }
 299         public void endVisit(
 300                 TypeDeclaration localTypeDeclaration,
 301                 BlockScope scope) {
 302                 // do nothing by default
 303         }
 304         public void endVisit(
 305                 TypeDeclaration memberTypeDeclaration,
 306                 ClassScope scope) {
 307                 // do nothing by default
 308         }
 309         public void endVisit(
 310                 TypeDeclaration typeDeclaration,
 311                 CompilationUnitScope scope) {
 312                 // do nothing by default
 313         }
 314         public void endVisit(UnaryExpression unaryExpression, BlockScope scope) {
 315                 // do nothing by default
 316         }
 317         public void endVisit(WhileStatement whileStatement, BlockScope scope) {
 318                 // do nothing by default
 319         }
 320         public boolean visit(
 321                 AllocationExpression allocationExpression,
 322                 BlockScope scope) {
 323                 return true; // do nothing by default, keep traversing
 324                 // do nothing by default
 325         }
 326         public boolean visit(AND_AND_Expression and_and_Expression, BlockScope scope) {
 327                 return true; // do nothing by default, keep traversing
 328         }
 329 //      public boolean visit(JavadocArrayQualifiedTypeReference typeRef, BlockScope scope) {
 330 //              return true; // do nothing by default, keep traversing
 331 //      }
 332 //      public boolean visit(JavadocArraySingleTypeReference typeRef, BlockScope scope) {
 333 //              return true; // do nothing by default, keep traversing
 334 //      }
 335 //      public boolean visit(JavadocArgumentExpression expression, BlockScope scope) {
 336 //              return true; // do nothing by default, keep traversing
 337 //      }
 338 //      public boolean visit(JavadocFieldReference fieldRef, BlockScope scope) {
 339 //              return true; // do nothing by default, keep traversing
 340 //      }
 341 //      public boolean visit(JavadocMessageSend messageSend, BlockScope scope) {
 342 //              return true; // do nothing by default, keep traversing
 343 //      }
 344 //      public boolean visit(JavadocQualifiedTypeReference typeRef, BlockScope scope) {
 345 //              return true; // do nothing by default, keep traversing
 346 //      }
 347 //      public boolean visit(JavadocReturnStatement statement, BlockScope scope) {
 348 //              return true; // do nothing by default, keep traversing
 349 //      }
 350 //      public boolean visit(JavadocSingleNameReference argument, BlockScope scope) {
 351 //              return true; // do nothing by default, keep traversing
 352 //      }
 353 //      public boolean visit(JavadocSingleTypeReference typeRef, BlockScope scope) {
 354 //              return true; // do nothing by default, keep traversing
 355 //      }
 356         public boolean visit(Argument argument, BlockScope scope) {
 357                 return true; // do nothing by default, keep traversing
 358         }
 359         public boolean visit(
 360                 ArrayAllocationExpression arrayAllocationExpression,
 361                 BlockScope scope) {
 362                 return true; // do nothing by default, keep traversing
 363         }
 364         public boolean visit(ArrayInitializer arrayInitializer, BlockScope scope) {
 365                 return true; // do nothing by default, keep traversing
 366         }
 367         public boolean visit(
 368                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 369                 BlockScope scope) {
 370                 return true; // do nothing by default, keep traversing
 371         }
 372         public boolean visit(
 373                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 374                 ClassScope scope) {
 375                 return true; // do nothing by default, keep traversing
 376         }
 377         public boolean visit(ArrayReference arrayReference, BlockScope scope) {
 378                 return true; // do nothing by default, keep traversing
 379         }
 380         public boolean visit(ArrayTypeReference arrayTypeReference, BlockScope scope) {
 381                 return true; // do nothing by default, keep traversing
 382         }
 383         public boolean visit(ArrayTypeReference arrayTypeReference, ClassScope scope) {
 384                 return true; // do nothing by default, keep traversing
 385         }
 386         public boolean visit(Assignment assignment, BlockScope scope) {
 387                 return true; // do nothing by default, keep traversing
 388         }
 389         public boolean visit(AssertStatement assertStatement, BlockScope scope) {
 390                 return true; // do nothing by default, keep traversing
 391         }
 392         public boolean visit(BinaryExpression binaryExpression, BlockScope scope) {
 393                 return true; // do nothing by default, keep traversing
 394         }
 395         public boolean visit(Block block, BlockScope scope) {
 396                 return true; // do nothing by default, keep traversing
 397         }
 398         public boolean visit(Break breakStatement, BlockScope scope) {
 399                 return true; // do nothing by default, keep traversing
 400         }
 401         public boolean visit(Case caseStatement, BlockScope scope) {
 402                 return true; // do nothing by default, keep traversing
 403         }
 404         public boolean visit(CastExpression castExpression, BlockScope scope) {
 405                 return true; // do nothing by default, keep traversing
 406         }
 407         public boolean visit(CharLiteral charLiteral, BlockScope scope) {
 408                 return true; // do nothing by default, keep traversing
 409         }
 410         public boolean visit(ClassLiteralAccess classLiteral, BlockScope scope) {
 411                 return true; // do nothing by default, keep traversing
 412         }
 413         public boolean visit(Clinit clinit, ClassScope scope) {
 414                 return true; // do nothing by default, keep traversing
 415         }
 416         public boolean visit(
 417                 CompilationUnitDeclaration compilationUnitDeclaration,
 418                 CompilationUnitScope scope) {
 419                 return true; // do nothing by default, keep traversing
 420         }
 421         public boolean visit(CompoundAssignment compoundAssignment, BlockScope scope) {
 422                 return true; // do nothing by default, keep traversing
 423         }
 424         public boolean visit(
 425                 ConditionalExpression conditionalExpression,
 426                 BlockScope scope) {
 427                 return true; // do nothing by default, keep traversing
 428         }
 429         public boolean visit(
 430                 ConstructorDeclaration constructorDeclaration,
 431                 ClassScope scope) {
 432                 return true; // do nothing by default, keep traversing
 433         }
 434         public boolean visit(Continue continueStatement, BlockScope scope) {
 435                 return true; // do nothing by default, keep traversing
 436         }
 437         public boolean visit(DoStatement doStatement, BlockScope scope) {
 438                 return true; // do nothing by default, keep traversing
 439         }
 440         public boolean visit(DoubleLiteral doubleLiteral, BlockScope scope) {
 441                 return true; // do nothing by default, keep traversing
 442         }
 443         public boolean visit(EqualExpression equalExpression, BlockScope scope) {
 444                 return true; // do nothing by default, keep traversing
 445         }
 446         public boolean visit(EmptyStatement emptyStatement, BlockScope scope) {
 447                 return true; // do nothing by default, keep traversing
 448         }
 449         public boolean visit(
 450                 ExplicitConstructorCall explicitConstructor,
 451                 BlockScope scope) {
 452                 return true; // do nothing by default, keep traversing
 453         }
 454         public boolean visit(
 455                 ExtendedStringLiteral extendedStringLiteral,
 456                 BlockScope scope) {
 457                 return true; // do nothing by default, keep traversing
 458         }
 459         public boolean visit(FalseLiteral falseLiteral, BlockScope scope) {
 460                 return true; // do nothing by default, keep traversing
 461         }
 462         public boolean visit(FieldDeclaration fieldDeclaration, MethodScope scope) {
 463                 return true; // do nothing by default, keep traversing
 464         }
 465         public boolean visit(FieldReference fieldReference, BlockScope scope) {
 466                 return true; // do nothing by default, keep traversing
 467         }
 468         public boolean visit(FloatLiteral floatLiteral, BlockScope scope) {
 469                 return true; // do nothing by default, keep traversing
 470         }
 471         public boolean visit(ForStatement forStatement, BlockScope scope) {
 472                 return true; // do nothing by default, keep traversing
 473         }
 474         public boolean visit(IfStatement ifStatement, BlockScope scope) {
 475                 return true; // do nothing by default, keep traversing
 476         }
 477         public boolean visit(ImportReference importRef, CompilationUnitScope scope) {
 478                 return true; // do nothing by default, keep traversing
 479         }
 480         public boolean visit(Initializer initializer, MethodScope scope) {
 481                 return true; // do nothing by default, keep traversing
 482         }
 483         public boolean visit(
 484                 InstanceOfExpression instanceOfExpression,
 485                 BlockScope scope) {
 486                 return true; // do nothing by default, keep traversing
 487         }
 488         public boolean visit(IntLiteral intLiteral, BlockScope scope) {
 489                 return true; // do nothing by default, keep traversing
 490         }
 491         public boolean visit(LabeledStatement labeledStatement, BlockScope scope) {
 492                 return true; // do nothing by default, keep traversing
 493         }
 494         public boolean visit(LocalDeclaration localDeclaration, BlockScope scope) {
 495                 return true; // do nothing by default, keep traversing
 496         }
 497         public boolean visit(LongLiteral longLiteral, BlockScope scope) {
 498                 return true; // do nothing by default, keep traversing
 499         }
 500         public boolean visit(MessageSend messageSend, BlockScope scope) {
 501                 return true; // do nothing by default, keep traversing
 502         }
 503         public boolean visit(MethodDeclaration methodDeclaration, ClassScope scope) {
 504                 return true; // do nothing by default, keep traversing
 505         }
 506 //      public boolean visit(
 507 //                      StringLiteralConcatenation literal,
 508 //                      BlockScope scope) {
 509 //              return true; // do nothing by default, keep traversing
 510 //      }
 511         public boolean visit(NullLiteral nullLiteral, BlockScope scope) {
 512                 return true; // do nothing by default, keep traversing
 513         }
 514         public boolean visit(OR_OR_Expression or_or_Expression, BlockScope scope) {
 515                 return true; // do nothing by default, keep traversing
 516         }
 517         public boolean visit(PostfixExpression postfixExpression, BlockScope scope) {
 518                 return true; // do nothing by default, keep traversing
 519         }
 520         public boolean visit(PrefixExpression prefixExpression, BlockScope scope) {
 521                 return true; // do nothing by default, keep traversing
 522         }
 523         public boolean visit(
 524                 QualifiedAllocationExpression qualifiedAllocationExpression,
 525                 BlockScope scope) {
 526                 return true; // do nothing by default, keep traversing
 527         }
 528         public boolean visit(
 529                 QualifiedNameReference qualifiedNameReference,
 530                 BlockScope scope) {
 531                 return true; // do nothing by default, keep traversing
 532         }
 533         public boolean visit(
 534                 QualifiedSuperReference qualifiedSuperReference,
 535                 BlockScope scope) {
 536                 return true; // do nothing by default, keep traversing
 537         }
 538         public boolean visit(
 539                 QualifiedThisReference qualifiedThisReference,
 540                 BlockScope scope) {
 541                 return true; // do nothing by default, keep traversing
 542         }
 543         public boolean visit(
 544                 QualifiedTypeReference qualifiedTypeReference,
 545                 BlockScope scope) {
 546                 return true; // do nothing by default, keep traversing
 547         }
 548         public boolean visit(
 549                 QualifiedTypeReference qualifiedTypeReference,
 550                 ClassScope scope) {
 551                 return true; // do nothing by default, keep traversing
 552         }
 553         public boolean visit(ReturnStatement returnStatement, BlockScope scope) {
 554                 return true; // do nothing by default, keep traversing
 555         }
 556         public boolean visit(
 557                 SingleNameReference singleNameReference,
 558                 BlockScope scope) {
 559                 return true; // do nothing by default, keep traversing
 560         }
 561         public boolean visit(
 562                 SingleTypeReference singleTypeReference,
 563                 BlockScope scope) {
 564                 return true; // do nothing by default, keep traversing
 565         }
 566         public boolean visit(
 567                 SingleTypeReference singleTypeReference,
 568                 ClassScope scope) {
 569                 return true; // do nothing by default, keep traversing
 570         }
 571         public boolean visit(StringLiteral stringLiteral, BlockScope scope) {
 572                 return true; // do nothing by default, keep traversing
 573         }
 574         public boolean visit(SuperReference superReference, BlockScope scope) {
 575                 return true; // do nothing by default, keep traversing
 576         }
 577         public boolean visit(SwitchStatement switchStatement, BlockScope scope) {
 578                 return true; // do nothing by default, keep traversing
 579         }
 580         public boolean visit(
 581                 SynchronizedStatement synchronizedStatement,
 582                 BlockScope scope) {
 583                 return true; // do nothing by default, keep traversing
 584         }
 585         public boolean visit(ThisReference thisReference, BlockScope scope) {
 586                 return true; // do nothing by default, keep traversing
 587         }
 588         public boolean visit(ThrowStatement throwStatement, BlockScope scope) {
 589                 return true; // do nothing by default, keep traversing
 590         }
 591         public boolean visit(TrueLiteral trueLiteral, BlockScope scope) {
 592                 return true; // do nothing by default, keep traversing
 593         }
 594         public boolean visit(TryStatement tryStatement, BlockScope scope) {
 595                 return true; // do nothing by default, keep traversing
 596         }
 597         public boolean visit(
 598                 TypeDeclaration localTypeDeclaration,
 599                 BlockScope scope) {
 600                 return true; // do nothing by default, keep traversing
 601         }
 602         public boolean visit(
 603                 TypeDeclaration memberTypeDeclaration,
 604                 ClassScope scope) {
 605                 return true; // do nothing by default, keep traversing
 606         }
 607         public boolean visit(
 608                 TypeDeclaration typeDeclaration,
 609                 CompilationUnitScope scope) {
 610                 return true; // do nothing by default, keep traversing
 611         }
 612         public boolean visit(UnaryExpression unaryExpression, BlockScope scope) {
 613                 return true; // do nothing by default, keep traversing
 614         }
 615         public boolean visit(WhileStatement whileStatement, BlockScope scope) {
 616                 return true; // do nothing by default, keep traversing
 617         }
 618 }