lt;</span><span class="identifier">IMType</span><span class="special">&gt;::</span><span class="identifier">value</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">tti</span><span class="special">::</span><span class="identifier">valid_member_metafunction</span><span class="special">&lt;</span><span class="identifier">IMTypeWithMarkerType</span><span class="special">&gt;::</span><span class="identifier">value</span>
</pre>
<p>
      gives us our compile-time