bject</span><span class="special">(</span><span class="identifier">subject</span><span class="special">)</span> <span class="special">{}</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">&gt;</span>
    <span class="keyword">bool</span> <span class="identifier">parse_container</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span