org.antlr.v4.automata.ATNVisitor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of antlr4 Show documentation
Show all versions of antlr4 Show documentation
The ANTLR 4 grammar compiler.
/*
* Copyright (c) 2012 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD-3-Clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.automata;
import org.antlr.v4.runtime.atn.ATNState;
import org.antlr.v4.runtime.atn.Transition;
import org.antlr.v4.runtime.misc.NotNull;
import java.util.HashSet;
import java.util.Set;
/** A simple visitor that walks everywhere it can go starting from s,
* without going into an infinite cycle. Override and implement
* visitState() to provide functionality.
*/
public class ATNVisitor {
public void visit(@NotNull ATNState s) {
visit_(s, new HashSet());
}
public void visit_(@NotNull ATNState s, @NotNull Set visited) {
if ( !visited.add(s.stateNumber) ) return;
visited.add(s.stateNumber);
visitState(s);
int n = s.getNumberOfTransitions();
for (int i=0; i