e is a clear
   idea of a <span class="quote">“<span class="quote">next</span>”</span> or <span class="quote">“<span class="quote">previous</span>”</span> value for each element value.
   Knowing that, it is possible to convert between inclusive and exclusive
   representations of a range's bounds, by choosing the next or previous
   element value instead of the one originally given.
   For example, in an integer range type <code class="literal">[4,8]</code> and
   <code class="literal">(3,9)</code>