> <span class="n">error_code</span><span class="o">&gt;</span><span class="p">)</span><span class="o">&gt;</span>
<span class="p">{</span>
  <span class="c1">// The result type we shall return
</span><span class="c1"></span>  <span class="k">using</span> <span class="n">result_type</span> <span class="o">=</span> <span class="n">outcome</span><span class="o">::</span><span class="n">result</span><span class="o">&lt;</span><span class="n">T</span><span class="p">,</span> <span class="n">error_code</span><spa