keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">safe_numerics</span><span class="special">;</span>

<span class="keyword">using</span> <span class="identifier">safe_t</span> <span class="special">=</span> <span class="identifier">safe_signed_range</span><span class="special">&lt;</span>
    <span class="special">-</span><span class="number">24</span><span class="special">,</span>
    <span class="number