NonRegularDecisionMessage.java revision 324c4644fee44b9898524c09511bd33c3f12e2df 
1/*
2 * [The "BSD license"]
3 *  Copyright (c) 2010 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.tool;
29
30import org.antlr.analysis.DecisionProbe;
31import org.stringtemplate.v4.ST;
32
33import java.util.ArrayList;
34import java.util.Collections;
35import java.util.List;
36import java.util.Set;
37
38/** More a single alternative recurses so this decision is not regular. */
39public class NonRegularDecisionMessage extends Message {
40	public DecisionProbe probe;
41	public Set<Integer> altsWithRecursion;
42
43	public NonRegularDecisionMessage(DecisionProbe probe, Set<Integer> altsWithRecursion) {
44		super(ErrorManager.MSG_NONREGULAR_DECISION);
45		this.probe = probe;
46		this.altsWithRecursion = altsWithRecursion;
47	}
48
49	public String toString() {
50		GrammarAST decisionASTNode = probe.dfa.getDecisionASTNode();
51		line = decisionASTNode.getLine();
52		column = decisionASTNode.getCharPositionInLine();
53		String fileName = probe.dfa.nfa.grammar.getFileName();
54		if ( fileName!=null ) {
55			file = fileName;
56		}
57
58		ST st = getMessageTemplate();
59		String ruleName = probe.dfa.getNFADecisionStartState().enclosingRule.name;
60		st.add("ruleName", ruleName);
61		List sortedAlts = new ArrayList();
62		sortedAlts.addAll(altsWithRecursion);
63		Collections.sort(sortedAlts); // make sure it's 1, 2, ...
64		st.add("alts", sortedAlts);
65
66		return super.toString(st);
67	}
68
69}
70