ge"><div><div><h1 style="clear: both"><code>value_or_error&lt;T, U&gt;</code></h1></div></div></div>
  <p>A customisable converter of <a href="../../reference/concepts/valueorerror.html" class="api-reference"><code>ValueOrError&lt;T, E&gt;</code></a> concept matching types. It must have the following form:</p>
<div class="highlight"><pre class="chroma"><code class="language-c++" data-lang="c++"><span class="c1">// `T` will be the destination basic_result or basic_outcome.
</span><span class="c1">// `U` will