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/SerializedATN.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.codegen.Target;
import org.antlr.v4.runtime.atn.ATN;
import org.antlr.v4.runtime.atn.ATNSerializer;
import org.antlr.v4.runtime.misc.IntegerList;

/** Represents a serialized ATN that is just a list of signed integers; works for all targets
 *  except for java, which requires a 16-bit char encoding. See {@link SerializedJavaATN}.
 */
public class SerializedATN extends OutputModelObject {
	public int[] serialized;

	public SerializedATN(OutputModelFactory factory) {
		super(factory);
	}

	public SerializedATN(OutputModelFactory factory, ATN atn) {
		super(factory);
		IntegerList data = ATNSerializer.getSerialized(atn);
		serialized = data.toArray();
	}

	public Object getSerialized() { return serialized; }
}

⏎ org/antlr/v4/codegen/model/SerializedATN.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

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⇑⇑ FAQ for ANTLR Parser Generator