 v1 finally went before Boost peer review
in May 2017 which turned into one of the longest and most detailed peer reviews Boost has
done in recent years, with over 800 pieces of review feedback submitted. It was by consensus
rejected, <a href="https://lists.boost.org/boost-announce/2017/06/0510.php">with substantial feedback on what to do instead</a>.</p>

<h2 id="outcome-v2">Outcome v2</h2>

<p>During the very lengthy peer review, roughly three groups of opinion emerged as to what
a <code>value|error</code