ass="keyword">typename</span> <span class="identifier">Subject</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">kleene</span> <span class="special">:</span> <span class="identifier">unary_parser</span><span class="special">&lt;</span><span class="identifier">kleene</span><span class="special">&lt;</span><span class="identifier">Subject</span><span class="special">&gt;</span> <span class="special">&gt;</span>
<span class="special">{</span>
    <span class="