01: /*
02: [The "BSD licence"]
03: Copyright (c) 2005-2006 Terence Parr
04: All rights reserved.
05:
06: Redistribution and use in source and binary forms, with or without
07: modification, are permitted provided that the following conditions
08: are met:
09: 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: */
28: package org.antlr.tool;
29:
30: import org.antlr.stringtemplate.StringTemplate;
31: import org.antlr.analysis.DecisionProbe;
32: import org.antlr.analysis.DFAState;
33: import org.antlr.analysis.NFAState;
34: import org.antlr.analysis.SemanticContext;
35: import antlr.Token;
36:
37: import java.util.Iterator;
38: import java.util.List;
39: import java.util.Set;
40:
41: /** Reports a potential parsing issue with a decision; the decision is
42: * nondeterministic in some way.
43: */
44: public class GrammarDanglingStateMessage extends Message {
45: public DecisionProbe probe;
46: public DFAState problemState;
47:
48: public GrammarDanglingStateMessage(DecisionProbe probe,
49: DFAState problemState) {
50: super (ErrorManager.MSG_DANGLING_STATE);
51: this .probe = probe;
52: this .problemState = problemState;
53: }
54:
55: public String toString() {
56: GrammarAST decisionASTNode = probe.dfa.getDecisionASTNode();
57: line = decisionASTNode.getLine();
58: column = decisionASTNode.getColumn();
59: String fileName = probe.dfa.nfa.grammar.getFileName();
60: if (fileName != null) {
61: file = fileName;
62: }
63: StringTemplate st = getMessageTemplate();
64: st.setAttribute("danglingAlts", problemState.getAltSet());
65:
66: return super.toString(st);
67: }
68:
69: }
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