the GCC <tt>mode</tt> or
<tt>vector_size</tt> attribute.</li>

<li>Unnamed ('transparent') <tt>struct</tt>/<tt>union</tt> fields
inside a <tt>struct</tt>/<tt>union</tt>.</li>

<li>Incomplete <tt>enum</tt> declarations, handled like incomplete
<tt>struct</tt> declarations.</li>

<li>Unnamed <tt>enum</tt> fields inside a
<tt>struct</tt>/<tt>union</tt>. This is similar to a scoped C++
<tt>enum</tt>, except that declared constants are visible in the
global namespace, too.</li>

<li>Scoped <tt>static&nbsp;const<