ordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;char&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;rindex_from_opt&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;char&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;option<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;contains&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">