/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You 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.apache.commons.functor;

 /**

  * Marker interface for unary (single-argument) functors.

  * <p>

  * Implementors are encouraged but not required to make their functors

  * {@link java.io.Serializable Serializable}.

  * </p>

  *

  * @param <A> the argument type.

  * @since 1.0

  * @version $Revision: 1156739 $ $Date: 2011-08-11 21:02:02 +0200 (Thu, 11 Aug 2011) $

  */

 public interface UnaryFunctor<A> extends Functor {

 }