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1   /*
2    * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24   */
25  
26  package com.sun.java_cup.internal.runtime;
27  
28  /**
29   * Defines the Scanner interface, which CUP uses in the default
30   * implementation of <code>lr_parser.scan()</code>.  Integration
31   * of scanners implementing <code>Scanner</code> is facilitated.
32   *
33   * @author David MacMahon <davidm@smartsc.com>
34   */
35  
36  /* *************************************************
37    Interface Scanner
38  
39    Declares the next_token() method that should be
40    implemented by scanners.  This method is typically
41    called by lr_parser.scan().
42   ***************************************************/
43  public interface Scanner {
44      public Symbol next_token() throws java.lang.Exception;
45  }