ading-from-boost-v-1-33">Upgrading from Boost v. <tt class="docutils literal"><span class="pre">1.33.*</span></tt></a></h1>
<p>If you upgrade from one of these versions of Boost, then there has been one
major interface change: map iterators now mimic iterators from <tt class="docutils literal"><span class="pre">std::map</span></tt>.
Previously you may have written</p>
<pre class="literal-block">
for( boost::ptr_map&lt;std::string,T&gt;::iterator i = m.begin(), e = m.end();
     i != e; ++i )
{
  std::cout &