net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/DefaultCase.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.impl.*;
  15 import net.sourceforge.phpdt.internal.compiler.codegen.*;
  16 import net.sourceforge.phpdt.internal.compiler.flow.*;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.*;
  18
  19 public class DefaultCase extends Statement {
  20
  21         public CaseLabel targetLabel;
  22         /**
  23          * DefautCase constructor comment.
  24          */
  25         public DefaultCase(int sourceEnd, int sourceStart) {
  26
  27                 this.sourceStart = sourceStart;
  28                 this.sourceEnd = sourceEnd;
  29         }
  30
  31         public FlowInfo analyseCode(
  32                 BlockScope currentScope,
  33                 FlowContext flowContext,
  34                 FlowInfo flowInfo) {
  35
  36                 return flowInfo;
  37         }
  38
  39         /**
  40          * Default case code generation
  41          *
  42          * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
  43          * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
  44          */
  45         public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  46
  47                 if ((bits & IsReachableMASK) == 0) {
  48                         return;
  49                 }
  50                 int pc = codeStream.position;
  51                 targetLabel.place();
  52                 codeStream.recordPositionsFrom(pc, this.sourceStart);
  53
  54         }
  55         public Constant resolveCase(
  56                 BlockScope scope,
  57                 TypeBinding testType,
  58                 SwitchStatement switchStatement) {
  59
  60                 // remember the default case into the associated switch statement
  61                 if (switchStatement.defaultCase != null)
  62                         scope.problemReporter().duplicateDefaultCase(this);
  63
  64                 // on error the last default will be the selected one .... (why not) ....
  65                 switchStatement.defaultCase = this;
  66                 resolve(scope);
  67                 return null;
  68         }
  69
  70         public String toString(int tab) {
  71
  72                 String s = tabString(tab);
  73                 s = s + "default : "; //$NON-NLS-1$
  74                 return s;
  75         }
  76
  77         public void traverse(
  78                 IAbstractSyntaxTreeVisitor visitor,
  79                 BlockScope blockScope) {
  80
  81                 visitor.visit(this, blockScope);
  82                 visitor.endVisit(this, blockScope);
  83         }
  84 }