:string -&gt; string -&gt; string</code></pre>
<pre><span id="VALrev_split_words"><span class="keyword">val</span> rev_split_words</span> : <code class="type">string -&gt; string list</code></pre>
<pre><span id="VALget_ref"><span class="keyword">val</span> get_ref</span> : <code class="type">'a list ref -&gt; 'a list</code></pre>
<pre><span id="VALset_or_ignore"><span class="keyword">val</span> set_or_ignore</span> : <code class="type">('a -&gt; 'b option) -&gt; 'b option ref -&gt; 'a -&gt; unit</code></pre