tructure : string <span>&#45;&gt;</span> <span><span><span class="type-var">'s</span> Ctypes_static.structure</span> <a href="index.html#type-typ">typ</a></span></code></dt><dt class="spec value" id="val-union"><a href="#val-union" class="anchor"></a><code><span class="keyword">val</span> union : string <span>&#45;&gt;</span> <span><span><span class="type-var">'s</span> Ctypes_static.union</span> <a href="index.html#type-typ">typ</a></span></code></dt><dt class="spec value" id="val-field"><a href="#val-fiel