path</span> <span class="special">&amp;</span> lib_path<span class="special">,</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode<span class="special">,</span> 
              <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&amp;</span> ec<span class="special">)</span><span class="special