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74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
/*
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[The "BSD licence"]
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Copyright (c) 2005-2008 Terence Parr
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.antlr.tool;
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import org.antlr.analysis.DFAState;
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import org.antlr.analysis.DecisionProbe;
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import org.antlr.stringtemplate.StringTemplate;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/** Reports a potential parsing issue with a decision; the decision is
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* nondeterministic in some way.
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*/
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public class GrammarDanglingStateMessage extends Message {
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public DecisionProbe probe;
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public DFAState problemState;
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public GrammarDanglingStateMessage(DecisionProbe probe,
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DFAState problemState)
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{
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super(ErrorManager.MSG_DANGLING_STATE);
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this.probe = probe;
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this.problemState = problemState;
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}
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public String toString() {
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GrammarAST decisionASTNode = probe.dfa.getDecisionASTNode();
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line = decisionASTNode.getLine();
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column = decisionASTNode.getColumn();
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String fileName = probe.dfa.nfa.grammar.getFileName();
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if ( fileName!=null ) {
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file = fileName;
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}
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List labels = probe.getSampleNonDeterministicInputSequence(problemState);
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String input = probe.getInputSequenceDisplay(labels);
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StringTemplate st = getMessageTemplate();
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List alts = new ArrayList();
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alts.addAll(problemState.getAltSet());
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Collections.sort(alts);
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st.setAttribute("danglingAlts", alts);
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st.setAttribute("input", input);
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return super.toString(st);
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}
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}
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