g emptiness.
    </p>
<p>
      The term 'v-type' refers to a VMD type, the term 'number' returns to a VMD
      number and the term 'identifier' refers to a VMD identifier. All these will
      be explained in their proper place.
    </p>
<p>
      The term "UB" stands for "undefined behavior" as it is
      specified in the C++ standard.
    </p>
</div>
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