"keyword">type</span> <span>!'a gen</span></span><span> = <span>unit <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> option</span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-make"><a href="#val-make" class="anchor"></a><code><span><span class="keyword">val</span> make : <span>int <span class="arrow">&#45;&gt;</span></span> <span>char <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-sp