1/*
2 [The "BSD license"]
3 Copyright (c) 2005-2009 Terence Parr
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions
8 are met:
9 1. Redistributions of source code must retain the above copyright
10     notice, this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12     notice, this list of conditions and the following disclaimer in the
13     documentation and/or other materials provided with the distribution.
14 3. The name of the author may not be used to endorse or promote products
15     derived from this software without specific prior written permission.
16
17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28package org.antlr.runtime.debug;
29
30import org.antlr.runtime.RecognitionException;
31import org.antlr.runtime.Token;
32
33/** A blank listener that does nothing; useful for real classes so
34 *  they don't have to have lots of blank methods and are less
35 *  sensitive to updates to debug interface.
36 */
37public class BlankDebugEventListener implements DebugEventListener {
38	public void enterRule(String grammarFileName, String ruleName) {}
39	public void exitRule(String grammarFileName, String ruleName) {}
40	public void enterAlt(int alt) {}
41	public void enterSubRule(int decisionNumber) {}
42	public void exitSubRule(int decisionNumber) {}
43	public void enterDecision(int decisionNumber, boolean couldBacktrack) {}
44	public void exitDecision(int decisionNumber) {}
45	public void location(int line, int pos) {}
46	public void consumeToken(Token token) {}
47	public void consumeHiddenToken(Token token) {}
48	public void LT(int i, Token t) {}
49	public void mark(int i) {}
50	public void rewind(int i) {}
51	public void rewind() {}
52	public void beginBacktrack(int level) {}
53	public void endBacktrack(int level, boolean successful) {}
54	public void recognitionException(RecognitionException e) {}
55	public void beginResync() {}
56	public void endResync() {}
57	public void semanticPredicate(boolean result, String predicate) {}
58	public void commence() {}
59	public void terminate() {}
60
61	// Tree parsing stuff
62
63	public void consumeNode(Object t) {}
64	public void LT(int i, Object t) {}
65
66	// AST Stuff
67
68	public void nilNode(Object t) {}
69	public void errorNode(Object t) {}
70	public void createNode(Object t) {}
71	public void createNode(Object node, Token token) {}
72	public void becomeRoot(Object newRoot, Object oldRoot) {}
73	public void addChild(Object root, Object child) {}
74	public void setTokenBoundaries(Object t, int tokenStartIndex, int tokenStopIndex) {}
75}
76
77
78