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

   1 /***********************************************************************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others. All rights reserved. This program and the accompanying materials are made
   3  * available under the terms of the Common Public License v1.0 which accompanies this distribution, and is available at
   4  * http://www.eclipse.org/legal/cpl-v10.html
   5  *
   6  * Contributors: IBM Corporation - initial API and implementation
   7  **********************************************************************************************************************************/
   8 package net.sourceforge.phpdt.internal.compiler.ast;
   9
  10 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  11 import net.sourceforge.phpdt.internal.compiler.codegen.CaseLabel;
  12 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  13 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  14 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  17
  18 public class DefaultCase extends Statement {
  19
  20         public CaseLabel targetLabel;
  21
  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(BlockScope currentScope,
  32                         FlowContext flowContext, FlowInfo flowInfo) {
  33
  34                 return flowInfo;
  35         }
  36
  37         /**
  38          * Default case code generation
  39          *
  40          * @param currentScope
  41          *            net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
  42          * @param codeStream
  43          *            net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
  44          */
  45         // public void generateCode(BlockScope currentScope, CodeStream codeStream)
  46         // {
  47         //
  48         // if ((bits & IsReachableMASK) == 0) {
  49         // return;
  50         // }
  51         // int pc = codeStream.position;
  52         // targetLabel.place();
  53         // codeStream.recordPositionsFrom(pc, this.sourceStart);
  54         //
  55         // }
  56         /**
  57          * No-op : should use resolveCase(...) instead.
  58          */
  59         public void resolve(BlockScope scope) {
  60         }
  61
  62         public Constant resolveCase(BlockScope scope, TypeBinding testType,
  63                         SwitchStatement switchStatement) {
  64
  65                 // remember the default case into the associated switch statement
  66                 if (switchStatement.defaultCase != null)
  67                         scope.problemReporter().duplicateDefaultCase(this);
  68
  69                 // on error the last default will be the selected one .... (why not)
  70                 // ....
  71                 switchStatement.defaultCase = this;
  72                 resolve(scope);
  73                 return null;
  74         }
  75
  76         public StringBuffer printStatement(int tab, StringBuffer output) {
  77
  78                 printIndent(tab, output);
  79                 output.append("default : "); //$NON-NLS-1$
  80                 return output.append(';');
  81         }
  82
  83         public String toString(int tab) {
  84
  85                 String s = tabString(tab);
  86                 s = s + "default : "; //$NON-NLS-1$
  87                 return s;
  88         }
  89
  90         public void traverse(IAbstractSyntaxTreeVisitor visitor,
  91                         BlockScope blockScope) {
  92
  93                 visitor.visit(this, blockScope);
  94                 visitor.endVisit(this, blockScope);
  95         }
  96 }