pan><span class="special">&lt;</span> <span class="identifier">monotonic_resource</span> <span class="special">&gt;();</span>

<span class="identifier">string</span> <span class="identifier">str</span><span class="special">(</span> <span class="identifier">sp</span> <span class="special">);</span>

<span class="identifier">assert</span><span class="special">(</span> <span class="identifier">sp</span><span class="special">.</span><span class="identifier">is_shared</span><span class="special">()</span> <span 