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.IProblem;
  14 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.ClassScope;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.CompilationUnitScope;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
  18 import net.sourceforge.phpeclipse.internal.compiler.ast.AND_AND_Expression;
  19 import net.sourceforge.phpeclipse.internal.compiler.ast.AllocationExpression;
  20 import net.sourceforge.phpeclipse.internal.compiler.ast.Argument;
  21 import net.sourceforge.phpeclipse.internal.compiler.ast.ArrayAllocationExpression;
  22 import net.sourceforge.phpeclipse.internal.compiler.ast.ArrayInitializer;
  23 import net.sourceforge.phpeclipse.internal.compiler.ast.ArrayQualifiedTypeReference;
  24 import net.sourceforge.phpeclipse.internal.compiler.ast.ArrayReference;
  25 import net.sourceforge.phpeclipse.internal.compiler.ast.ArrayTypeReference;
  26 import net.sourceforge.phpeclipse.internal.compiler.ast.AssertStatement;
  27 import net.sourceforge.phpeclipse.internal.compiler.ast.Assignment;
  28 import net.sourceforge.phpeclipse.internal.compiler.ast.BinaryExpression;
  29 import net.sourceforge.phpeclipse.internal.compiler.ast.Block;
  30 import net.sourceforge.phpeclipse.internal.compiler.ast.BreakStatement;
  31 import net.sourceforge.phpeclipse.internal.compiler.ast.CaseStatement;
  32 import net.sourceforge.phpeclipse.internal.compiler.ast.CastExpression;
  33 import net.sourceforge.phpeclipse.internal.compiler.ast.Clinit;
  34 import net.sourceforge.phpeclipse.internal.compiler.ast.CompilationUnitDeclaration;
  35 import net.sourceforge.phpeclipse.internal.compiler.ast.CompoundAssignment;
  36 import net.sourceforge.phpeclipse.internal.compiler.ast.ConditionalExpression;
  37 import net.sourceforge.phpeclipse.internal.compiler.ast.ConstructorDeclaration;
  38 import net.sourceforge.phpeclipse.internal.compiler.ast.ContinueStatement;
  39 import net.sourceforge.phpeclipse.internal.compiler.ast.DoStatement;
  40 import net.sourceforge.phpeclipse.internal.compiler.ast.DoubleLiteral;
  41 import net.sourceforge.phpeclipse.internal.compiler.ast.EmptyStatement;
  42 import net.sourceforge.phpeclipse.internal.compiler.ast.EqualExpression;
  43 import net.sourceforge.phpeclipse.internal.compiler.ast.ExplicitConstructorCall;
  44 import net.sourceforge.phpeclipse.internal.compiler.ast.ExtendedStringLiteral;
  45 import net.sourceforge.phpeclipse.internal.compiler.ast.FalseLiteral;
  46 import net.sourceforge.phpeclipse.internal.compiler.ast.FieldDeclaration;
  47 import net.sourceforge.phpeclipse.internal.compiler.ast.FieldReference;
  48 import net.sourceforge.phpeclipse.internal.compiler.ast.FloatLiteral;
  49 import net.sourceforge.phpeclipse.internal.compiler.ast.ForStatement;
  50 import net.sourceforge.phpeclipse.internal.compiler.ast.IfStatement;
  51 import net.sourceforge.phpeclipse.internal.compiler.ast.ImportReference;
  52 import net.sourceforge.phpeclipse.internal.compiler.ast.Initializer;
  53 import net.sourceforge.phpeclipse.internal.compiler.ast.InstanceOfExpression;
  54 import net.sourceforge.phpeclipse.internal.compiler.ast.IntLiteral;
  55 import net.sourceforge.phpeclipse.internal.compiler.ast.LabeledStatement;
  56 import net.sourceforge.phpeclipse.internal.compiler.ast.LocalDeclaration;
  57 import net.sourceforge.phpeclipse.internal.compiler.ast.LongLiteral;
  58 import net.sourceforge.phpeclipse.internal.compiler.ast.MessageSend;
  59 import net.sourceforge.phpeclipse.internal.compiler.ast.MethodDeclaration;
  60 import net.sourceforge.phpeclipse.internal.compiler.ast.NullLiteral;
  61 import net.sourceforge.phpeclipse.internal.compiler.ast.OR_OR_Expression;
  62 import net.sourceforge.phpeclipse.internal.compiler.ast.PostfixExpression;
  63 import net.sourceforge.phpeclipse.internal.compiler.ast.PrefixExpression;
  64 import net.sourceforge.phpeclipse.internal.compiler.ast.QualifiedAllocationExpression;
  65 import net.sourceforge.phpeclipse.internal.compiler.ast.QualifiedNameReference;
  66 import net.sourceforge.phpeclipse.internal.compiler.ast.QualifiedSuperReference;
  67 import net.sourceforge.phpeclipse.internal.compiler.ast.QualifiedThisReference;
  68 import net.sourceforge.phpeclipse.internal.compiler.ast.QualifiedTypeReference;
  69 import net.sourceforge.phpeclipse.internal.compiler.ast.ReturnStatement;
  70 import net.sourceforge.phpeclipse.internal.compiler.ast.SingleNameReference;
  71 import net.sourceforge.phpeclipse.internal.compiler.ast.SingleTypeReference;
  72 import net.sourceforge.phpeclipse.internal.compiler.ast.StringLiteral;
  73 import net.sourceforge.phpeclipse.internal.compiler.ast.SuperReference;
  74 import net.sourceforge.phpeclipse.internal.compiler.ast.SwitchStatement;
  75 import net.sourceforge.phpeclipse.internal.compiler.ast.ThisReference;
  76 import net.sourceforge.phpeclipse.internal.compiler.ast.ThrowStatement;
  77 import net.sourceforge.phpeclipse.internal.compiler.ast.TrueLiteral;
  78 import net.sourceforge.phpeclipse.internal.compiler.ast.TryStatement;
  79 import net.sourceforge.phpeclipse.internal.compiler.ast.TypeDeclaration;
  80 import net.sourceforge.phpeclipse.internal.compiler.ast.UnaryExpression;
  81 import net.sourceforge.phpeclipse.internal.compiler.ast.WhileStatement;
  82
  83 /**
  84  * A visitor for iterating through the parse tree.
  85  */
  86 public abstract class ASTVisitor {
  87
  88         public void acceptProblem(IProblem problem) {
  89                 // do nothing by default
  90         }
  91         public void endVisit(
  92                 AllocationExpression allocationExpression,
  93                 BlockScope scope) {
  94                 // do nothing by default
  95         }
  96         public void endVisit(AND_AND_Expression and_and_Expression, BlockScope scope) {
  97                 // do nothing by default
  98         }
  99 //      public void endVisit(JavadocArrayQualifiedTypeReference typeRef, BlockScope scope) {
 100 //              // do nothing by default
 101 //      }
 102 //      public void endVisit(JavadocArraySingleTypeReference typeRef, BlockScope scope) {
 103 //              // do nothing by default
 104 //      }
 105 //      public void endVisit(JavadocArgumentExpression expression, BlockScope scope) {
 106 //              // do nothing by default
 107 //      }
 108 //      public void endVisit(JavadocFieldReference fieldRef, BlockScope scope) {
 109 //              // do nothing by default
 110 //      }
 111 //      public void endVisit(JavadocMessageSend messageSend, BlockScope scope) {
 112 //              // do nothing by default
 113 //      }
 114 //      public void endVisit(JavadocQualifiedTypeReference typeRef, BlockScope scope) {
 115 //              // do nothing by default
 116 //      }
 117 //      public void endVisit(JavadocReturnStatement statement, BlockScope scope) {
 118 //              // do nothing by default
 119 //      }
 120 //      public void endVisit(JavadocSingleNameReference argument, BlockScope scope) {
 121 //              // do nothing by default
 122 //      }
 123 //      public void endVisit(JavadocSingleTypeReference typeRef, BlockScope scope) {
 124 //              // do nothing by default
 125 //      }
 126         public void endVisit(Argument argument, BlockScope scope) {
 127                 // do nothing by default
 128         }
 129         public void endVisit(
 130                 ArrayAllocationExpression arrayAllocationExpression,
 131                 BlockScope scope) {
 132                 // do nothing by default
 133         }
 134         public void endVisit(ArrayInitializer arrayInitializer, BlockScope scope) {
 135                 // do nothing by default
 136         }
 137         public void endVisit(
 138                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 139                 BlockScope scope) {
 140                 // do nothing by default
 141         }
 142         public void endVisit(
 143                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 144                 ClassScope scope) {
 145                 // do nothing by default
 146         }
 147         public void endVisit(ArrayReference arrayReference, BlockScope scope) {
 148                 // do nothing by default
 149         }
 150         public void endVisit(ArrayTypeReference arrayTypeReference, BlockScope scope) {
 151                 // do nothing by default
 152         }
 153         public void endVisit(ArrayTypeReference arrayTypeReference, ClassScope scope) {
 154                 // do nothing by default
 155         }
 156         public void endVisit(Assignment assignment, BlockScope scope) {
 157                 // do nothing by default
 158         }
 159         public void endVisit(AssertStatement assertStatement, BlockScope scope) {
 160                 // do nothing by default
 161         }
 162         public void endVisit(BinaryExpression binaryExpression, BlockScope scope) {
 163                 // do nothing by default
 164         }
 165         public void endVisit(Block block, BlockScope scope) {
 166                 // do nothing by default
 167         }
 168         public void endVisit(BreakStatement breakStatement, BlockScope scope) {
 169                 // do nothing by default
 170         }
 171         public void endVisit(CaseStatement caseStatement, BlockScope scope) {
 172                 // do nothing by default
 173         }
 174         public void endVisit(CastExpression castExpression, BlockScope scope) {
 175                 // do nothing by default
 176         }
 177
 178         public void endVisit(Clinit clinit, ClassScope scope) {
 179                 // do nothing by default
 180         }
 181         public void endVisit(
 182                 CompilationUnitDeclaration compilationUnitDeclaration,
 183                 CompilationUnitScope scope) {
 184                 // do nothing by default
 185         }
 186         public void endVisit(CompoundAssignment compoundAssignment, BlockScope scope) {
 187                 // do nothing by default
 188         }
 189         public void endVisit(
 190                 ConditionalExpression conditionalExpression,
 191                 BlockScope scope) {
 192                 // do nothing by default
 193         }
 194         public void endVisit(
 195                 ConstructorDeclaration constructorDeclaration,
 196                 ClassScope scope) {
 197                 // do nothing by default
 198         }
 199         public void endVisit(ContinueStatement continueStatement, BlockScope scope) {
 200                 // do nothing by default
 201         }
 202         public void endVisit(DoStatement doStatement, BlockScope scope) {
 203                 // do nothing by default
 204         }
 205         public void endVisit(DoubleLiteral doubleLiteral, BlockScope scope) {
 206                 // do nothing by default
 207         }
 208         public void endVisit(EqualExpression equalExpression, BlockScope scope) {
 209                 // do nothing by default
 210         }
 211         public void endVisit(
 212                 ExplicitConstructorCall explicitConstructor,
 213                 BlockScope scope) {
 214                 // do nothing by default
 215         }
 216         public void endVisit(
 217                 ExtendedStringLiteral extendedStringLiteral,
 218                 BlockScope scope) {
 219                 // do nothing by default
 220         }
 221         public void endVisit(FalseLiteral falseLiteral, BlockScope scope) {
 222                 // do nothing by default
 223         }
 224         public void endVisit(FieldDeclaration fieldDeclaration, MethodScope scope) {
 225                 // do nothing by default
 226         }
 227         public void endVisit(FieldReference fieldReference, BlockScope scope) {
 228                 // do nothing by default
 229         }
 230         public void endVisit(FloatLiteral floatLiteral, BlockScope scope) {
 231                 // do nothing by default
 232         }
 233         public void endVisit(EmptyStatement emptyStatement, BlockScope scope) {
 234                 // do nothing by default
 235         }
 236         public void endVisit(ForStatement forStatement, BlockScope scope) {
 237                 // do nothing by default
 238         }
 239         public void endVisit(IfStatement ifStatement, BlockScope scope) {
 240                 // do nothing by default
 241         }
 242         public void endVisit(ImportReference importRef, CompilationUnitScope scope) {
 243                 // do nothing by default
 244         }
 245         public void endVisit(Initializer initializer, MethodScope scope) {
 246                 // do nothing by default
 247         }
 248         public void endVisit(
 249                 InstanceOfExpression instanceOfExpression,
 250                 BlockScope scope) {
 251                 // do nothing by default
 252         }
 253         public void endVisit(IntLiteral intLiteral, BlockScope scope) {
 254                 // do nothing by default
 255         }
 256         public void endVisit(LabeledStatement labeledStatement, BlockScope scope) {
 257                 // do nothing by default
 258         }
 259         public void endVisit(LocalDeclaration localDeclaration, BlockScope scope) {
 260                 // do nothing by default
 261         }
 262         public void endVisit(LongLiteral longLiteral, BlockScope scope) {
 263                 // do nothing by default
 264         }
 265         public void endVisit(MessageSend messageSend, BlockScope scope) {
 266                 // do nothing by default
 267         }
 268         public void endVisit(MethodDeclaration methodDeclaration, ClassScope scope) {
 269                 // do nothing by default
 270         }
 271 //      public void endVisit(StringLiteralConcatenation literal, BlockScope scope) {
 272 //              // do nothing by default
 273 //      }
 274         public void endVisit(NullLiteral nullLiteral, BlockScope scope) {
 275                 // do nothing by default
 276         }
 277         public void endVisit(OR_OR_Expression or_or_Expression, BlockScope scope) {
 278                 // do nothing by default
 279         }
 280         public void endVisit(PostfixExpression postfixExpression, BlockScope scope) {
 281                 // do nothing by default
 282         }
 283         public void endVisit(PrefixExpression prefixExpression, BlockScope scope) {
 284                 // do nothing by default
 285         }
 286         public void endVisit(
 287                 QualifiedAllocationExpression qualifiedAllocationExpression,
 288                 BlockScope scope) {
 289                 // do nothing by default
 290         }
 291         public void endVisit(
 292                 QualifiedNameReference qualifiedNameReference,
 293                 BlockScope scope) {
 294                 // do nothing by default
 295         }
 296         public void endVisit(
 297                 QualifiedSuperReference qualifiedSuperReference,
 298                 BlockScope scope) {
 299                 // do nothing by default
 300         }
 301         public void endVisit(
 302                 QualifiedThisReference qualifiedThisReference,
 303                 BlockScope scope) {
 304                 // do nothing by default
 305         }
 306         public void endVisit(
 307                 QualifiedTypeReference qualifiedTypeReference,
 308                 BlockScope scope) {
 309                 // do nothing by default
 310         }
 311         public void endVisit(
 312                 QualifiedTypeReference qualifiedTypeReference,
 313                 ClassScope scope) {
 314                 // do nothing by default
 315         }
 316         public void endVisit(ReturnStatement returnStatement, BlockScope scope) {
 317                 // do nothing by default
 318         }
 319         public void endVisit(
 320                 SingleNameReference singleNameReference,
 321                 BlockScope scope) {
 322                 // do nothing by default
 323         }
 324         public void endVisit(
 325                 SingleTypeReference singleTypeReference,
 326                 BlockScope scope) {
 327                 // do nothing by default
 328         }
 329         public void endVisit(
 330                 SingleTypeReference singleTypeReference,
 331                 ClassScope scope) {
 332                 // do nothing by default
 333         }
 334         public void endVisit(StringLiteral stringLiteral, BlockScope scope) {
 335                 // do nothing by default
 336         }
 337         public void endVisit(SuperReference superReference, BlockScope scope) {
 338                 // do nothing by default
 339         }
 340         public void endVisit(SwitchStatement switchStatement, BlockScope scope) {
 341                 // do nothing by default
 342         }
 343
 344         public void endVisit(ThisReference thisReference, BlockScope scope) {
 345                 // do nothing by default
 346         }
 347         public void endVisit(ThrowStatement throwStatement, BlockScope scope) {
 348                 // do nothing by default
 349         }
 350         public void endVisit(TrueLiteral trueLiteral, BlockScope scope) {
 351                 // do nothing by default
 352         }
 353         public void endVisit(TryStatement tryStatement, BlockScope scope) {
 354                 // do nothing by default
 355         }
 356         public void endVisit(
 357                 TypeDeclaration localTypeDeclaration,
 358                 BlockScope scope) {
 359                 // do nothing by default
 360         }
 361         public void endVisit(
 362                 TypeDeclaration memberTypeDeclaration,
 363                 ClassScope scope) {
 364                 // do nothing by default
 365         }
 366         public void endVisit(
 367                 TypeDeclaration typeDeclaration,
 368                 CompilationUnitScope scope) {
 369                 // do nothing by default
 370         }
 371         public void endVisit(UnaryExpression unaryExpression, BlockScope scope) {
 372                 // do nothing by default
 373         }
 374         public void endVisit(WhileStatement whileStatement, BlockScope scope) {
 375                 // do nothing by default
 376         }
 377         public boolean visit(
 378                 AllocationExpression allocationExpression,
 379                 BlockScope scope) {
 380                 return true; // do nothing by default, keep traversing
 381                 // do nothing by default
 382         }
 383         public boolean visit(AND_AND_Expression and_and_Expression, BlockScope scope) {
 384                 return true; // do nothing by default, keep traversing
 385         }
 386 //      public boolean visit(JavadocArrayQualifiedTypeReference typeRef, BlockScope scope) {
 387 //              return true; // do nothing by default, keep traversing
 388 //      }
 389 //      public boolean visit(JavadocArraySingleTypeReference typeRef, BlockScope scope) {
 390 //              return true; // do nothing by default, keep traversing
 391 //      }
 392 //      public boolean visit(JavadocArgumentExpression expression, BlockScope scope) {
 393 //              return true; // do nothing by default, keep traversing
 394 //      }
 395 //      public boolean visit(JavadocFieldReference fieldRef, BlockScope scope) {
 396 //              return true; // do nothing by default, keep traversing
 397 //      }
 398 //      public boolean visit(JavadocMessageSend messageSend, BlockScope scope) {
 399 //              return true; // do nothing by default, keep traversing
 400 //      }
 401 //      public boolean visit(JavadocQualifiedTypeReference typeRef, BlockScope scope) {
 402 //              return true; // do nothing by default, keep traversing
 403 //      }
 404 //      public boolean visit(JavadocReturnStatement statement, BlockScope scope) {
 405 //              return true; // do nothing by default, keep traversing
 406 //      }
 407 //      public boolean visit(JavadocSingleNameReference argument, BlockScope scope) {
 408 //              return true; // do nothing by default, keep traversing
 409 //      }
 410 //      public boolean visit(JavadocSingleTypeReference typeRef, BlockScope scope) {
 411 //              return true; // do nothing by default, keep traversing
 412 //      }
 413         public boolean visit(Argument argument, BlockScope scope) {
 414                 return true; // do nothing by default, keep traversing
 415         }
 416         public boolean visit(
 417                 ArrayAllocationExpression arrayAllocationExpression,
 418                 BlockScope scope) {
 419                 return true; // do nothing by default, keep traversing
 420         }
 421         public boolean visit(ArrayInitializer arrayInitializer, BlockScope scope) {
 422                 return true; // do nothing by default, keep traversing
 423         }
 424         public boolean visit(
 425                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 426                 BlockScope scope) {
 427                 return true; // do nothing by default, keep traversing
 428         }
 429         public boolean visit(
 430                 ArrayQualifiedTypeReference arrayQualifiedTypeReference,
 431                 ClassScope scope) {
 432                 return true; // do nothing by default, keep traversing
 433         }
 434         public boolean visit(ArrayReference arrayReference, BlockScope scope) {
 435                 return true; // do nothing by default, keep traversing
 436         }
 437         public boolean visit(ArrayTypeReference arrayTypeReference, BlockScope scope) {
 438                 return true; // do nothing by default, keep traversing
 439         }
 440         public boolean visit(ArrayTypeReference arrayTypeReference, ClassScope scope) {
 441                 return true; // do nothing by default, keep traversing
 442         }
 443         public boolean visit(Assignment assignment, BlockScope scope) {
 444                 return true; // do nothing by default, keep traversing
 445         }
 446         public boolean visit(AssertStatement assertStatement, BlockScope scope) {
 447                 return true; // do nothing by default, keep traversing
 448         }
 449         public boolean visit(BinaryExpression binaryExpression, BlockScope scope) {
 450                 return true; // do nothing by default, keep traversing
 451         }
 452         public boolean visit(Block block, BlockScope scope) {
 453                 return true; // do nothing by default, keep traversing
 454         }
 455         public boolean visit(BreakStatement breakStatement, BlockScope scope) {
 456                 return true; // do nothing by default, keep traversing
 457         }
 458         public boolean visit(CaseStatement caseStatement, BlockScope scope) {
 459                 return true; // do nothing by default, keep traversing
 460         }
 461         public boolean visit(CastExpression castExpression, BlockScope scope) {
 462                 return true; // do nothing by default, keep traversing
 463         }
 464
 465         public boolean visit(Clinit clinit, ClassScope scope) {
 466                 return true; // do nothing by default, keep traversing
 467         }
 468         public boolean visit(
 469                 CompilationUnitDeclaration compilationUnitDeclaration,
 470                 CompilationUnitScope scope) {
 471                 return true; // do nothing by default, keep traversing
 472         }
 473         public boolean visit(CompoundAssignment compoundAssignment, BlockScope scope) {
 474                 return true; // do nothing by default, keep traversing
 475         }
 476         public boolean visit(
 477                 ConditionalExpression conditionalExpression,
 478                 BlockScope scope) {
 479                 return true; // do nothing by default, keep traversing
 480         }
 481         public boolean visit(
 482                 ConstructorDeclaration constructorDeclaration,
 483                 ClassScope scope) {
 484                 return true; // do nothing by default, keep traversing
 485         }
 486         public boolean visit(ContinueStatement continueStatement, BlockScope scope) {
 487                 return true; // do nothing by default, keep traversing
 488         }
 489         public boolean visit(DoStatement doStatement, BlockScope scope) {
 490                 return true; // do nothing by default, keep traversing
 491         }
 492         public boolean visit(DoubleLiteral doubleLiteral, BlockScope scope) {
 493                 return true; // do nothing by default, keep traversing
 494         }
 495         public boolean visit(EqualExpression equalExpression, BlockScope scope) {
 496                 return true; // do nothing by default, keep traversing
 497         }
 498         public boolean visit(EmptyStatement emptyStatement, BlockScope scope) {
 499                 return true; // do nothing by default, keep traversing
 500         }
 501         public boolean visit(
 502                 ExplicitConstructorCall explicitConstructor,
 503                 BlockScope scope) {
 504                 return true; // do nothing by default, keep traversing
 505         }
 506         public boolean visit(
 507                 ExtendedStringLiteral extendedStringLiteral,
 508                 BlockScope scope) {
 509                 return true; // do nothing by default, keep traversing
 510         }
 511         public boolean visit(FalseLiteral falseLiteral, BlockScope scope) {
 512                 return true; // do nothing by default, keep traversing
 513         }
 514         public boolean visit(FieldDeclaration fieldDeclaration, MethodScope scope) {
 515                 return true; // do nothing by default, keep traversing
 516         }
 517         public boolean visit(FieldReference fieldReference, BlockScope scope) {
 518                 return true; // do nothing by default, keep traversing
 519         }
 520         public boolean visit(FloatLiteral floatLiteral, BlockScope scope) {
 521                 return true; // do nothing by default, keep traversing
 522         }
 523         public boolean visit(ForStatement forStatement, BlockScope scope) {
 524                 return true; // do nothing by default, keep traversing
 525         }
 526         public boolean visit(IfStatement ifStatement, BlockScope scope) {
 527                 return true; // do nothing by default, keep traversing
 528         }
 529         public boolean visit(ImportReference importRef, CompilationUnitScope scope) {
 530                 return true; // do nothing by default, keep traversing
 531         }
 532         public boolean visit(Initializer initializer, MethodScope scope) {
 533                 return true; // do nothing by default, keep traversing
 534         }
 535         public boolean visit(
 536                 InstanceOfExpression instanceOfExpression,
 537                 BlockScope scope) {
 538                 return true; // do nothing by default, keep traversing
 539         }
 540         public boolean visit(IntLiteral intLiteral, BlockScope scope) {
 541                 return true; // do nothing by default, keep traversing
 542         }
 543         public boolean visit(LabeledStatement labeledStatement, BlockScope scope) {
 544                 return true; // do nothing by default, keep traversing
 545         }
 546         public boolean visit(LocalDeclaration localDeclaration, BlockScope scope) {
 547                 return true; // do nothing by default, keep traversing
 548         }
 549         public boolean visit(LongLiteral longLiteral, BlockScope scope) {
 550                 return true; // do nothing by default, keep traversing
 551         }
 552         public boolean visit(MessageSend messageSend, BlockScope scope) {
 553                 return true; // do nothing by default, keep traversing
 554         }
 555         public boolean visit(MethodDeclaration methodDeclaration, ClassScope scope) {
 556                 return true; // do nothing by default, keep traversing
 557         }
 558 //      public boolean visit(
 559 //                      StringLiteralConcatenation literal,
 560 //                      BlockScope scope) {
 561 //              return true; // do nothing by default, keep traversing
 562 //      }
 563         public boolean visit(NullLiteral nullLiteral, BlockScope scope) {
 564                 return true; // do nothing by default, keep traversing
 565         }
 566         public boolean visit(OR_OR_Expression or_or_Expression, BlockScope scope) {
 567                 return true; // do nothing by default, keep traversing
 568         }
 569         public boolean visit(PostfixExpression postfixExpression, BlockScope scope) {
 570                 return true; // do nothing by default, keep traversing
 571         }
 572         public boolean visit(PrefixExpression prefixExpression, BlockScope scope) {
 573                 return true; // do nothing by default, keep traversing
 574         }
 575         public boolean visit(
 576                 QualifiedAllocationExpression qualifiedAllocationExpression,
 577                 BlockScope scope) {
 578                 return true; // do nothing by default, keep traversing
 579         }
 580         public boolean visit(
 581                 QualifiedNameReference qualifiedNameReference,
 582                 BlockScope scope) {
 583                 return true; // do nothing by default, keep traversing
 584         }
 585         public boolean visit(
 586                 QualifiedSuperReference qualifiedSuperReference,
 587                 BlockScope scope) {
 588                 return true; // do nothing by default, keep traversing
 589         }
 590         public boolean visit(
 591                 QualifiedThisReference qualifiedThisReference,
 592                 BlockScope scope) {
 593                 return true; // do nothing by default, keep traversing
 594         }
 595         public boolean visit(
 596                 QualifiedTypeReference qualifiedTypeReference,
 597                 BlockScope scope) {
 598                 return true; // do nothing by default, keep traversing
 599         }
 600         public boolean visit(
 601                 QualifiedTypeReference qualifiedTypeReference,
 602                 ClassScope scope) {
 603                 return true; // do nothing by default, keep traversing
 604         }
 605         public boolean visit(ReturnStatement returnStatement, BlockScope scope) {
 606                 return true; // do nothing by default, keep traversing
 607         }
 608         public boolean visit(
 609                 SingleNameReference singleNameReference,
 610                 BlockScope scope) {
 611                 return true; // do nothing by default, keep traversing
 612         }
 613         public boolean visit(
 614                 SingleTypeReference singleTypeReference,
 615                 BlockScope scope) {
 616                 return true; // do nothing by default, keep traversing
 617         }
 618         public boolean visit(
 619                 SingleTypeReference singleTypeReference,
 620                 ClassScope scope) {
 621                 return true; // do nothing by default, keep traversing
 622         }
 623         public boolean visit(StringLiteral stringLiteral, BlockScope scope) {
 624                 return true; // do nothing by default, keep traversing
 625         }
 626         public boolean visit(SuperReference superReference, BlockScope scope) {
 627                 return true; // do nothing by default, keep traversing
 628         }
 629         public boolean visit(SwitchStatement switchStatement, BlockScope scope) {
 630                 return true; // do nothing by default, keep traversing
 631         }
 632
 633         public boolean visit(ThisReference thisReference, BlockScope scope) {
 634                 return true; // do nothing by default, keep traversing
 635         }
 636         public boolean visit(ThrowStatement throwStatement, BlockScope scope) {
 637                 return true; // do nothing by default, keep traversing
 638         }
 639         public boolean visit(TrueLiteral trueLiteral, BlockScope scope) {
 640                 return true; // do nothing by default, keep traversing
 641         }
 642         public boolean visit(TryStatement tryStatement, BlockScope scope) {
 643                 return true; // do nothing by default, keep traversing
 644         }
 645         public boolean visit(
 646                 TypeDeclaration localTypeDeclaration,
 647                 BlockScope scope) {
 648                 return true; // do nothing by default, keep traversing
 649         }
 650         public boolean visit(
 651                 TypeDeclaration memberTypeDeclaration,
 652                 ClassScope scope) {
 653                 return true; // do nothing by default, keep traversing
 654         }
 655         public boolean visit(
 656                 TypeDeclaration typeDeclaration,
 657                 CompilationUnitScope scope) {
 658                 return true; // do nothing by default, keep traversing
 659         }
 660         public boolean visit(UnaryExpression unaryExpression, BlockScope scope) {
 661                 return true; // do nothing by default, keep traversing
 662         }
 663         public boolean visit(WhileStatement whileStatement, BlockScope scope) {
 664                 return true; // do nothing by default, keep traversing
 665         }
 666 }