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/*
 * 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.classgen;

import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.ExpressionTransformer;

/**
 * Represents some custom bytecode generation by the compiler
 * 
 * @author James Strachan
 * @version $Revision: 8326 $
 */
public abstract class BytecodeExpression extends Expression {
    public static BytecodeExpression NOP = new BytecodeExpression() {
        public void visit(GroovyCodeVisitor visitor) {
            //do nothing             
        }
    };
    
    
    public BytecodeExpression() {
    }
    
    public abstract void visit(GroovyCodeVisitor visitor);

    public Expression transformExpression(ExpressionTransformer transformer) {
        return this;
    }
}