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.codegen.CaseLabel;
  15 import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
  16 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  17 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  18 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  21
  22 public class DefaultCase extends Statement {
  23
  24         public CaseLabel targetLabel;
  25         /**
  26          * DefautCase constructor comment.
  27          */
  28         public DefaultCase(int sourceEnd, int sourceStart) {
  29
  30                 this.sourceStart = sourceStart;
  31                 this.sourceEnd = sourceEnd;
  32         }
  33
  34         public FlowInfo analyseCode(
  35                 BlockScope currentScope,
  36                 FlowContext flowContext,
  37                 FlowInfo flowInfo) {
  38
  39                 return flowInfo;
  40         }
  41
  42         /**
  43          * Default case code generation
  44          *
  45          * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
  46          * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
  47          */
  48         public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  49
  50                 if ((bits & IsReachableMASK) == 0) {
  51                         return;
  52                 }
  53                 int pc = codeStream.position;
  54                 targetLabel.place();
  55                 codeStream.recordPositionsFrom(pc, this.sourceStart);
  56
  57         }
  58         public Constant resolveCase(
  59                 BlockScope scope,
  60                 TypeBinding testType,
  61                 SwitchStatement switchStatement) {
  62
  63                 // remember the default case into the associated switch statement
  64                 if (switchStatement.defaultCase != null)
  65                         scope.problemReporter().duplicateDefaultCase(this);
  66
  67                 // on error the last default will be the selected one .... (why not) ....
  68                 switchStatement.defaultCase = this;
  69                 resolve(scope);
  70                 return null;
  71         }
  72
  73         public String toString(int tab) {
  74
  75                 String s = tabString(tab);
  76                 s = s + "default : "; //$NON-NLS-1$
  77                 return s;
  78         }
  79
  80         public void traverse(
  81                 IAbstractSyntaxTreeVisitor visitor,
  82                 BlockScope blockScope) {
  83
  84                 visitor.visit(this, blockScope);
  85                 visitor.endVisit(this, blockScope);
  86         }
  87 }