pan class="n">i</span> <span class="o">+</span> <span class="n">f</span><span class="p">();</span>
  <span class="p">}</span>
  <span class="k">catch</span> <span class="p">(...)</span> <span class="p">{</span>
    <span class="k">return</span> <span class="n">std</span><span class="o">::</span><span class="n">current_exception</span><span class="p">();</span> <span class="c1">// #2
</span><span class="c1"></span>  <span class="p">}</span>
<span class="p">}</span>
</code></pre></div><a href="https://github.