/******************************************************************************* | |
* Copyright (c) 2000, 2004 IBM Corporation and others. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Common Public License v1.0 | |
* which accompanies this distribution, and is available at | |
* http://www.eclipse.org/legal/cpl-v10.html | |
* | |
* Contributors: | |
* IBM Corporation - initial API and implementation | |
*******************************************************************************/ | |
package org.eclipse.wst.jsdt.internal.compiler.ast; | |
import org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope; | |
import org.eclipse.wst.jsdt.internal.compiler.classfmt.ClassFileConstants; | |
import org.eclipse.wst.jsdt.internal.compiler.codegen.CodeStream; | |
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext; | |
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo; | |
import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor; | |
public class EmptyStatement extends Statement { | |
public EmptyStatement(int startPosition, int endPosition) { | |
this.sourceStart = startPosition; | |
this.sourceEnd = endPosition; | |
} | |
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { | |
return flowInfo; | |
} | |
// Report an error if necessary | |
public boolean complainIfUnreachable(FlowInfo flowInfo, BlockScope scope, boolean didAlreadyComplain) { | |
// before 1.4, empty statements are tolerated anywhere | |
if (scope.environment().options.complianceLevel < ClassFileConstants.JDK1_4) { | |
return false; | |
} | |
return super.complainIfUnreachable(flowInfo, scope, didAlreadyComplain); | |
} | |
public void generateCode(BlockScope currentScope, CodeStream codeStream){ | |
// no bytecode, no need to check for reachability or recording source positions | |
} | |
public StringBuffer printStatement(int tab, StringBuffer output) { | |
return printIndent(tab, output).append(';'); | |
} | |
public void resolve(BlockScope scope) { | |
if ((bits & IsUsefulEmptyStatementMASK) == 0) { | |
scope.problemReporter().superfluousSemicolon(this.sourceStart, this.sourceEnd); | |
} else { | |
scope.problemReporter().emptyControlFlowStatement(this.sourceStart, this.sourceEnd); | |
} | |
} | |
public void traverse(ASTVisitor visitor, BlockScope scope) { | |
visitor.visit(this, scope); | |
visitor.endVisit(this, scope); | |
} | |
} | |