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/codegen/model/Loop.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.codegen.model;

import org.antlr.v4.codegen.OutputModelFactory;
import org.antlr.v4.tool.ast.GrammarAST;
import org.antlr.v4.tool.ast.QuantifierAST;

import java.util.ArrayList;
import java.util.List;

public class Loop extends Choice {
	public int blockStartStateNumber;
	public int loopBackStateNumber;
	public final int exitAlt;

	@ModelElement public List<SrcOp> iteration;

	public Loop(OutputModelFactory factory,
				GrammarAST blkOrEbnfRootAST,
				List<CodeBlockForAlt> alts)
	{
		super(factory, blkOrEbnfRootAST, alts);
		boolean nongreedy = (blkOrEbnfRootAST instanceof QuantifierAST) && !((QuantifierAST)blkOrEbnfRootAST).isGreedy();
		exitAlt = nongreedy ? 1 : alts.size() + 1;
	}

	public void addIterationOp(SrcOp op) {
		if ( iteration==null ) iteration = new ArrayList<SrcOp>();
		iteration.add(op);
	}
}

⏎ org/antlr/v4/codegen/model/Loop.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