ANTLR is a powerful parser generator for multiple programming languages including Java.

ANTLR contains 2 major modules:

• Runtime - For building and executing parsers/lexers generated in Java.
• Tool (The Parser Generator) - For generating parsers/lexers Java class.

ANTLR Tool Source Code files are provided in the distribution packge (antlr4-4.10.1.zip). You can download them at ANTLR Website.

You can also browse the source code below:

⏎ org/antlr/v4/tool/ast/AltAST.java

/*
 * Copyright (c) 2012-2017 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.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); }
}

⏎ org/antlr/v4/tool/ast/AltAST.java

Or download all of them as a single archive file:

File name: antlr-tool-4.10.1-sources.jar
File size: 347718 bytes
Release date: 2022-04-15
Download 

⇒ Donwload antlr4-4.10.1.zip

⇐ ANTLR Runtime Source Code

⇑ Download and Review ANTLR Parser Generator

⇑⇑ FAQ for ANTLR Parser Generator