nt&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;search_backward&nbsp;:&nbsp;<span class="constructor">Str</span>.regexp&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;string_partial_match&nbsp;:&nbsp;<span class="constructor">Str</span>.regexp&nbsp;<span class="keywordsign">-&gt;<