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/OptionalBlockAST.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;

public class OptionalBlockAST extends GrammarAST implements RuleElementAST, QuantifierAST {
	private final boolean _greedy;

	public OptionalBlockAST(OptionalBlockAST node) {
		super(node);
		_greedy = node._greedy;
	}

	public OptionalBlockAST(int type, Token t, Token nongreedy) {
		super(type, t);
		_greedy = nongreedy == null;
	}

	@Override
	public boolean isGreedy() {
		return _greedy;
	}

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

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

}

⏎ org/antlr/v4/tool/ast/OptionalBlockAST.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