><a class="link" href="#boost_utility_identitytype.annex__usage" title="Annex: Usage">Annex: Usage</a></h2></div></div></div><p>
      The <code class="computeroutput"><a class="link" href="#BOOST_IDENTITY_TYPE" title="Macro BOOST_IDENTITY_TYPE">BOOST_IDENTITY_TYPE</a></code> macro
      can be used either when calling a user-defined macro (as shown by the examples
      so far), or internally when implementing a user-defined macro (as shown below).
      When <code class="computeroutput"><a class="link" hr