,&nbsp;<span class="constructor">Stdlib</span>.<span class="constructor">Buffer</span>.t,&nbsp;unit,&nbsp;<span class="keywordsign">'</span>d)&nbsp;<span class="constructor">Stdlib</span>.format4&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;kprintf&nbsp;:&nbsp;(string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>b)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;(<span class="