org.codehaus.groovy.ast.stmt.ReturnStatement Maven / Gradle / Ivy
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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.codehaus.groovy.ast.stmt;
import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.ast.expr.ConstantExpression;
import org.codehaus.groovy.ast.expr.Expression;
/**
* A return statement
*
* @author James Strachan
* @version $Revision: 15123 $
*/
public class ReturnStatement extends Statement {
/**
* Only used for synthetic return statements emitted by the compiler.
* For comparisons use isReturningNullOrVoid() instead.
*/
public static final ReturnStatement RETURN_NULL_OR_VOID = new ReturnStatement(ConstantExpression.NULL);
private Expression expression;
public ReturnStatement(ExpressionStatement statement) {
this(statement.getExpression());
setStatementLabel(statement.getStatementLabel());
}
public ReturnStatement(Expression expression) {
this.expression = expression;
}
public void visit(GroovyCodeVisitor visitor) {
visitor.visitReturnStatement(this);
}
public Expression getExpression() {
return expression;
}
public String getText() {
return "return " + expression.getText();
}
public void setExpression(Expression expression) {
this.expression = expression;
}
public boolean isReturningNullOrVoid() {
return expression instanceof ConstantExpression
&& ((ConstantExpression)expression).isNullExpression();
}
}