ally a container type</span>
        <span class="identifier">traits</span><span class="special">::</span><span class="identifier">make_container</span><span class="special">(</span><span class="identifier">attr</span><span class="special">);</span>

        <span class="keyword">typedef</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">fail_function</span><span class="special">&lt;</span><span class="identifier">Iterator</span><span class="special">,</span