&gt;</span>
    <span class="keyword">inline</span> <span class="special">&lt;</span><span class="identifier">unspecified</span><span class="special">&gt;</span>
    <span class="identifier">format</span><span class="special">(</span>
        <span class="identifier">Attr</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">xpr</span><span class="special">);</span>
<span class="special">}}}</span>
</pre>
<p>
            All functions above return a standard IO