/tt> declarations inside a
<tt>struct</tt>/<tt>union</tt> (from C++).</li>

<li>Zero-length arrays (<tt>[0]</tt>), empty
<tt>struct</tt>/<tt>union</tt>, variable-length arrays (VLA,
<tt>[?]</tt>) and variable-length structs (VLS, with a trailing
VLA).</li>

<li>C++ reference types (<tt>int&nbsp;&amp;x</tt>).</li>

<li>Alternate GCC keywords with '<tt>__</tt>', e.g.
<tt>__const__</tt>.</li>

<li>GCC <tt>__attribute__</tt> with the following attributes:
<tt>aligned</tt>, <tt>packed</tt>, <tt>mode</tt>,
<tt>ve