n>&nbsp;to_int32&nbsp;:&nbsp;int64&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int32&nbsp;=&nbsp;<span class="string">"%int64_to_int32"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;of_nativeint&nbsp;:&nbsp;nativeint&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int64&nbsp;=&nbsp;<span class="string">"%int64_of_nativeint"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;to_nativeint&nbsp;:&nbsp;int64&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;nativeint&nbsp