e for coroutinised
i/o in ASIO to return a <code>result&lt;T&gt;</code>:</p>

<div class="code-snippet"><div class="highlight"><pre class="chroma"><code class="language-c++" data-lang="c++">  <span class="c1">// Asynchronously read data, suspending this coroutine until completion,
</span><span class="c1"></span>  <span class="c1">// returning the bytes of the data read into the result, or any failure.
</span><span class="c1"></span>  <span class="n">outcome</span><span class="o">::</span><span class="n">res