rusive/multiset.html" title="Class template multiset">multiset</a></code> and the latter is a generalization
      that offers functions both to insert unique and multiple keys.
    </p>
<p>
      The memory overhead of these containers with Boost.Intrusive hooks is usually
      3 pointers and 2 bits (due to alignment, this usually means 3 pointers plus
      an integer). This size can be reduced to 3 pointers if pointers have 4 byte
      alignment (which is usually true in 32 bit systems).
    </p>
<p>
 