span><span><span class="type-var">'a</span> Ctypes_static.ptr</span> <a href="index.html#type-typ">typ</a></span></code></dt><dt class="spec value" id="val-ptr_opt"><a href="#val-ptr_opt" class="anchor"></a><code><span class="keyword">val</span> ptr_opt : <span><span class="type-var">'a</span> <a href="index.html#type-typ">typ</a></span> <span>&#45;&gt;</span> <span><span><span><span class="type-var">'a</span> Ctypes_static.ptr</span> option</span> <a href="index.html#type-typ">typ</a></span></code></dt><dt