1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * [The "BSD license"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2010 Terence Parr 4324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 6324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Redistribution and use in source and binary forms, with or without 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * modification, are permitted provided that the following conditions 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * are met: 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 1. Redistributions of source code must retain the above copyright 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer. 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 2. Redistributions in binary form must reproduce the above copyright 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer in the 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * documentation and/or other materials provided with the distribution. 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 3. The name of the author may not be used to endorse or promote products 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * derived from this software without specific prior written permission. 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverpackage org.antlr.tool; 29324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.antlr.analysis.DecisionProbe; 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.antlr.analysis.NFAState; 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.stringtemplate.v4.ST; 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport java.util.List; 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/** Reports a potential parsing issue with a decision; the decision is 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * nondeterministic in some way. 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverpublic class GrammarUnreachableAltsMessage extends Message { 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public DecisionProbe probe; 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public List alts; 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public GrammarUnreachableAltsMessage(DecisionProbe probe, 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver List alts) 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver super(ErrorManager.MSG_UNREACHABLE_ALTS); 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.probe = probe; 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.alts = alts; 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // flip msg ID if alts are actually token refs in Tokens rule 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( probe.dfa.isTokensRuleDecision() ) { 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver setMessageID(ErrorManager.MSG_UNREACHABLE_TOKENS); 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public String toString() { 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver GrammarAST decisionASTNode = probe.dfa.getDecisionASTNode(); 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver line = decisionASTNode.getLine(); 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver column = decisionASTNode.getCharPositionInLine(); 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver String fileName = probe.dfa.nfa.grammar.getFileName(); 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( fileName!=null ) { 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver file = fileName; 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ST st = getMessageTemplate(); 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( probe.dfa.isTokensRuleDecision() ) { 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // alts are token rules, convert to the names instead of numbers 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver for (int i = 0; i < alts.size(); i++) { 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Integer altI = (Integer) alts.get(i); 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver String tokenName = 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver probe.getTokenNameForTokensRuleAlt(altI.intValue()); 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // reset the line/col to the token definition 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver NFAState ruleStart = 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver probe.dfa.nfa.grammar.getRuleStartState(tokenName); 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver line = ruleStart.associatedASTNode.getLine(); 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver column = ruleStart.associatedASTNode.getCharPositionInLine(); 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver st.add("tokens", tokenName); 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else { 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // regular alt numbers, show the alts 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver st.add("alts", alts); 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return super.toString(st); 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 89