pan> <span class="special">&gt;</span>
        <span class="special">::</span><span class="keyword">template</span> <span class="identifier">impl</span><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">State</span><span class="special">,</span> <span class="identifier">Data</span> <span class="special">&gt;</span>
<span class="special">{</span>
<span class="special">}</span><span class="special">;</span></pre></div>
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