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/target/DartTarget.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.target;

import org.antlr.v4.codegen.CodeGenerator;
import org.antlr.v4.codegen.Target;
import org.stringtemplate.v4.STGroup;
import org.stringtemplate.v4.StringRenderer;

import java.util.*;

public class DartTarget extends Target {
	protected static final Map<Character, String> targetCharValueEscape;
	static {
		HashMap<Character, String> map = new HashMap<>();
		for (Map.Entry<Character, String> entry : defaultCharValueEscape.entrySet()) {
			map.put(entry.getKey(), entry.getValue());
		}
		addEscapedChar(map, '$');
		targetCharValueEscape = map;
	}

	protected static final HashSet<String> reservedWords = new HashSet<>(Arrays.asList(
		"abstract", "dynamic", "implements", "show",
		"as", "else", "import", "static",
		"assert", "enum", "in", "super",
		"async", "export", "interface", "switch",
		"await", "extends", "is", "sync",
		"break", "external", "library", "this",
		"case", "factory", "mixin", "throw",
		"catch", "false", "new", "true",
		"class", "final", "null", "try",
		"const", "finally", "on", "typedef",
		"continue", "for", "operator", "var",
		"covariant", "Function", "part", "void",
		"default", "get", "rethrow", "while",
		"deferred", "hide", "return", "with",
		"do", "if", "set", "yield",

		"rule", "parserRule"
	));

	public DartTarget(CodeGenerator gen) {
		super(gen);
	}

	@Override
	public Map<Character, String> getTargetCharValueEscape() {
		return targetCharValueEscape;
	}

	@Override
	public String getTargetStringLiteralFromANTLRStringLiteral(CodeGenerator generator, String literal, boolean addQuotes,
															   boolean escapeSpecial) {
		return super.getTargetStringLiteralFromANTLRStringLiteral(generator, literal, addQuotes, escapeSpecial).replace("$", "\\$");
	}

	public Set<String> getReservedWords() {
		return reservedWords;
	}

	@Override
	protected STGroup loadTemplates() {
		STGroup result = super.loadTemplates();
		result.registerRenderer(String.class, new StringRenderer(), true);

		return result;
	}

	@Override
	public boolean isATNSerializedAsInts() {
		return true;
	}

	@Override
	protected String escapeChar(int v) {
		return String.format("\\u{%X}", v);
	}
}

⏎ org/antlr/v4/codegen/target/DartTarget.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