001    /**
002     *
003     * Copyright 2005 Jeremy Rayner
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     * http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     *
017     **/
018    
019    package org.codehaus.groovy.antlr;
020    
021    import antlr.collections.AST;
022    
023    /**
024     * An interface for processing antlr AST objects
025     *
026     * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
027     * @version $Revision: 2387 $
028     */
029    public interface AntlrASTProcessor {
030        /**
031         * performs some processing on the supplied AST node.
032         * @param t the AST node to process.
033         * @return possibly returns the AST modified or null, depends on the implementation.
034         */
035        AST process(AST t);
036    }