"type-var">'s</span>, <span>[&lt; `Struct <span>| `Union</span> ]</span> <span class="keyword">as</span> b)</span> Ctypes_static.structured</span> <a href="index.html#type-typ">typ</a></span> <span>&#45;&gt;</span> string <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-typ">typ</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'a</span>, <span><span>(<span class="type-var">'s</span>, <span class="type-var">'b</span>)</span> Ctypes_static.structur