;<span class="keyword">val</span>&nbsp;one&nbsp;:&nbsp;<span class="constructor">Targetint</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;minus_one&nbsp;:&nbsp;<span class="constructor">Targetint</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;neg&nbsp;:&nbsp;<span class="constructor">Targetint</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Targetint</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;add&nbsp;:&nbsp;<span class=