iant of
the <a href="ext_ffi_semantics.html#convert">C&nbsp;type conversion
rules</a>.
</p>
<p>
This functions is mainly useful to override the pointer compatibility
checks or to convert pointers to addresses or vice versa.
</p>

<h3 id="ffi_metatype"><tt>ctype = ffi.metatype(ct, metatable)</tt></h3>
<p>
Creates a ctype object for the given <tt>ct</tt> and associates it with
a metatable. Only <tt>struct</tt>/<tt>union</tt> types, complex numbers
and vectors are allowed. Other types may be wrapped in a
<tt>s