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The ANTLR 4 Runtime

There is a newer version: 4.13.2

package org.antlr.v4.runtime.tree.xpath;

import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.Trees;

import java.util.Collection;

/**
 * Either {@code ID} at start of path or {@code ...//ID} in middle of path.
 */
public class XPathRuleAnywhereElement extends XPathElement {
	protected int ruleIndex;
	public XPathRuleAnywhereElement(String ruleName, int ruleIndex) {
		super(ruleName);
		this.ruleIndex = ruleIndex;
	}

	@Override
	public Collection evaluate(ParseTree t) {
		return Trees.findAllRuleNodes(t, ruleIndex);
	}
}