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/ActionAST.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.tool.AttributeResolver;

import java.util.List;

public class ActionAST extends GrammarASTWithOptions implements RuleElementAST {
    // Alt, rule, grammar space
    public AttributeResolver resolver;
	public List<Token> chunks; // useful for ANTLR IDE developers

	public ActionAST(ActionAST node) {
		super(node);
		this.resolver = node.resolver;
		this.chunks = node.chunks;
	}

	public ActionAST(Token t) { super(t); }
    public ActionAST(int type) { super(type); }
    public ActionAST(int type, Token t) { super(type, t); }

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

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

⏎ org/antlr/v4/tool/ast/ActionAST.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