diff options
Diffstat (limited to 'antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarDanglingStateMessage.java')
-rw-r--r-- | antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarDanglingStateMessage.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarDanglingStateMessage.java b/antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarDanglingStateMessage.java new file mode 100644 index 0000000..e360dd7 --- /dev/null +++ b/antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarDanglingStateMessage.java @@ -0,0 +1,73 @@ +/* + * [The "BSD license"] + * Copyright (c) 2010 Terence Parr + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +package org.antlr.tool; + +import org.antlr.analysis.DFAState; +import org.antlr.analysis.DecisionProbe; +import org.stringtemplate.v4.ST; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +/** Reports a potential parsing issue with a decision; the decision is + * nondeterministic in some way. + */ +public class GrammarDanglingStateMessage extends Message { + public DecisionProbe probe; + public DFAState problemState; + + public GrammarDanglingStateMessage(DecisionProbe probe, + DFAState problemState) + { + super(ErrorManager.MSG_DANGLING_STATE); + this.probe = probe; + this.problemState = problemState; + } + + public String toString() { + GrammarAST decisionASTNode = probe.dfa.getDecisionASTNode(); + line = decisionASTNode.getLine(); + column = decisionASTNode.getCharPositionInLine(); + String fileName = probe.dfa.nfa.grammar.getFileName(); + if ( fileName!=null ) { + file = fileName; + } + List labels = probe.getSampleNonDeterministicInputSequence(problemState); + String input = probe.getInputSequenceDisplay(labels); + ST st = getMessageTemplate(); + List alts = new ArrayList(); + alts.addAll(problemState.getAltSet()); + Collections.sort(alts); + st.add("danglingAlts", alts); + st.add("input", input); + + return super.toString(st); + } + +} |