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1   /***
2    *
3    * Copyright 2005 Jeremy Rayner
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   *
17   **/
18  
19  package org.codehaus.groovy.antlr;
20  
21  import antlr.collections.AST;
22  
23  /***
24   * An interface for processing antlr AST objects
25   *
26   * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
27   * @version $Revision: 1.2 $
28   */
29  public interface AntlrASTProcessor {
30      /***
31       * performs some processing on the supplied AST node.
32       * @param t the AST node to process.
33       * @return possibly returns the AST modified or null, depends on the implementation.
34       */
35      AST process(AST t);
36  }