org.aspectj.org.eclipse.jdt.internal.compiler.ast.EmptyStatement Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation

AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

There is a newer version: 1.9.22.1

Show newest version

/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Stephan Herrmann - Contribution for bug 349326 - [1.7] new warning for missing try-with-resources
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.compiler.ast;

import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.aspectj.org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.aspectj.org.eclipse.jdt.internal.compiler.codegen.CodeStream;
import org.aspectj.org.eclipse.jdt.internal.compiler.flow.FlowContext;
import org.aspectj.org.eclipse.jdt.internal.compiler.flow.FlowInfo;
import org.aspectj.org.eclipse.jdt.internal.compiler.ASTVisitor;

public class EmptyStatement extends Statement {

	public EmptyStatement(int startPosition, int endPosition) {
		this.sourceStart = startPosition;
		this.sourceEnd = endPosition;
	}

	@Override
	public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
		return flowInfo;
	}

	// Report an error if necessary
	@Override
	public int complainIfUnreachable(FlowInfo flowInfo, BlockScope scope, int complaintLevel, boolean endOfBlock) {
		// before 1.4, empty statements are tolerated anywhere
		if (scope.compilerOptions().complianceLevel < ClassFileConstants.JDK1_4) {
			return complaintLevel;
		}
		return super.complainIfUnreachable(flowInfo, scope, complaintLevel, endOfBlock);
	}

	@Override
	public void generateCode(BlockScope currentScope, CodeStream codeStream){
		// no bytecode, no need to check for reachability or recording source positions
	}

	@Override
	public StringBuilder printStatement(int tab, StringBuilder output) {
		return printIndent(tab, output).append(';');
	}

	@Override
	public void resolve(BlockScope scope) {
		if ((this.bits & IsUsefulEmptyStatement) == 0) {
			scope.problemReporter().superfluousSemicolon(this.sourceStart, this.sourceEnd);
		} else {
			scope.problemReporter().emptyControlFlowStatement(this.sourceStart, this.sourceEnd);
		}
	}

	@Override
	public void traverse(ASTVisitor visitor, BlockScope scope) {
		visitor.visit(this, scope);
		visitor.endVisit(this, scope);
	}


}