public Node parse() throws ScanException {
    return E();
  }
@Test
  public void keywordGluedToLitteral() throws Exception {
    Parser<Object> p = new Parser("%x{}a");
    Node t = p.parse();
    SimpleKeywordNode witness = new SimpleKeywordNode("x");
    witness.setOptions(new ArrayList<String>());
    witness.next = new Node(Node.LITERAL, "a");
    assertEquals(witness, t);
  }