OOST_VMD_GET_TYPE macro on a single-element
      sequence which is one of our user-defined subtype values we correctly get back
      our user-defined subtype's v-type, just like we do when we ask for the type
      of a number. Also when we use our BOOST_VMD_GET_TYPE macro on our user-defined
      subtype's v-type itself we correctly get back the type of all v-types, which
      is BOOST_VMD_TYPE_TYPE, just like we do when we ask for the type of the v-type
      of a number.
    </p>
<pre class="programl