!7

set flag OurSubLists.
set flag NoIllegalAccesses.

module > DynTestModule {
  void test {
    LS list = ll("a", "b", "a", "b");
    LS sublist = subList(list, 2, 4);
    
    // Note that we couldn't find this out without the magic trick
    // (comparison by elements would yield 0 instead of 2).
    assertEqualsVerbose("Index", 2, magicIndexOfSubList(list, sublist));
    assertEqualsVerbose("Index", 0, magicIndexOfSubList(list, list));
    
    LS sublist2 = subList(sublist, 1, 2);
    print(className(sublist2));
    assertEqualsVerbose("Index", 1, magicIndexOfSubList(sublist, sublist2));
    assertEqualsVerbose("Index", 3, magicIndexOfSubList(list, sublist2));
    assertEqualsVerbose("Index", -1, magicIndexOfSubList(list, subList(ll("a", "b"), 0, 1)));

  }
}

Began life as a copy of #1001831