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/*
 * Copyright (c) 2012 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.runtime.tree.pattern;

/**
 * A chunk is either a token tag, a rule tag, or a span of literal text within a
 * tree pattern.
 *
 * The method {@link ParseTreePatternMatcher#split(String)} returns a list of
 * chunks in preparation for creating a token stream by
 * {@link ParseTreePatternMatcher#tokenize(String)}. From there, we get a parse
 * tree from with {@link ParseTreePatternMatcher#compile(String, int)}. These
 * chunks are converted to {@link RuleTagToken}, {@link TokenTagToken}, or the
 * regular tokens of the text surrounding the tags.
 */
abstract class Chunk {
}