y_t</span><span class="o">&lt;</span><span class="n">CompletionToken</span><span class="o">&gt;&gt;</span><span class="p">{</span><span class="n">std</span><span class="o">::</span><span class="n">forward</span><span class="o">&lt;</span><span class="n">CompletionToken</span><span class="o">&gt;</span><span class="p">(</span><span class="n">token</span><span class="p">)};</span>
<span class="p">};</span>
</code></pre></div><a href="https://github.com/boostorg/outcome/tree/master/doc/src/snippets/boost-only/