-></span>include &lt;<span class="RenoLink"><a href="boost_exception_ptr_hpp.html">boost/exception_ptr.hpp</a></span>&gt;</p>
<pre>namespace
boost
    {
<span class="RenoIncludeSPAN">    class
    <span class="RenoLink">unknown_exception</span>:
        public std::exception
        public boost::<span class="RenoLink"><a href="exception.html">exception</a></span>
        {
        ---unspecified---
        };</span>
    }</pre>
</div><p>This type is used by the <span class="RenoLink"><a href="exception_ptr