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The ANTLR 4 grammar compiler.
There is a newer version: 4.13.2
/*
 * [The "BSD license"]
 *  Copyright (c) 2012 Terence Parr
 *  Copyright (c) 2012 Sam Harwell
 *  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.v4.tool.ast;

import org.antlr.runtime.Token;
import org.antlr.v4.analysis.LeftRecursiveRuleAltInfo;
import org.antlr.v4.tool.Alternative;

/** Any ALT (which can be child of ALT_REWRITE node) */
public class AltAST extends GrammarASTWithOptions {
	public Alternative alt;

	/** If we transformed this alt from a left-recursive one, need info on it */
	public LeftRecursiveRuleAltInfo leftRecursiveAltInfo;

	/** If someone specified an outermost alternative label with #foo.
	 *  Token type will be ID.
	 */
	public GrammarAST altLabel;

	public AltAST(AltAST node) {
		super(node);
		this.alt = node.alt;
		this.altLabel = node.altLabel;
		this.leftRecursiveAltInfo = node.leftRecursiveAltInfo;
	}

	public AltAST(Token t) { super(t); }
	public AltAST(int type) { super(type); }
	public AltAST(int type, Token t) { super(type, t); }
	public AltAST(int type, Token t, String text) { super(type,t,text); }

	@Override
	public AltAST dupNode() { return new AltAST(this); }

	@Override
	public Object visit(GrammarASTVisitor v) { return v.visit(this); }
}