PatternMatching.java 文件源码

/**
 * Searches for subtrees that adhere to the given XPath expression
 * and applies pattern matching on each subtree.
 *
 * @param pattern the parse tree pattern, refer to https://github.com/antlr/antlr4/blob/master/doc/faq/parse-trees.md
 * @param rule the production rule in the parser that the pattern adheres to
 * @param xPath the XPath expression that will be used to find subtrees
 * @return a list of matches
 */
List<ParseTreeMatch> match(String pattern, int rule, String xPath) {
    ParseTreePattern p = ast.getParser().compileParseTreePattern(pattern, rule);
    return p.findAll(ast.getTree(), xPath);
}