r">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>     <span class="comment">// OK, fixed precision int128_t has no allocator.</span>
<span class="identifier">constexpr</span> <span class="identifier">uint1024_t</span>          <span class="identifier">j</span> <span class="special">=</span> <span class="number">0</span><span class="identifier">xFFFFFFFF00000000uLL</span><span class="special">;</span>  <span class="comment">// OK, fixed precision uint1024_