n_name</span><span class=special>),</span><span class=identifier>phone_number</span><span class=special>(</span><span class=identifier>phone_number</span><span class=special>)</span>
  <span class=special>{}</span>
<span class=special>};</span>

<span class=comment>// define a multi_index_container with a composite key on
// (family_name,given_name)</span>
<span class=keyword>typedef</span> <span class=identifier>multi_index_container</span><span class=special>&lt;</span>
  <span class=identifier>phonebook_