Parentheses.java 文件源码

/**
 * Returns whether {@code input} consists of balanced parentheses.
 *
 * <p>For example, {@code verify("(())")} returns true, but {@code verify("(")} returns false.
 *
 * @param input the {@code String} to parse and verify
 * @return whether {@code input} consists of balanced parentheses
 */
public static boolean verify(String input) {
  ParenthesesParser parser = ParserUtil.newParser(
      ParenthesesLexer::new, ParenthesesParser::new, input);

  try {
    parser.expression();
  } catch (ParseCancellationException e) {
    return false;
  }

  return true;
}