lue in the implementation passed in. Constexpr, never throws.</p><li>
	<a href="../reference/policies/base/error.html" ><code>static auto &amp;&amp;_error(Impl &amp;&amp;) noexcept</code></a>
<p>Returns a reference to the error in the implementation passed in. Constexpr, never throws.</p><li>
	<a href="../reference/policies/base/exception.html" ><code>static auto &amp;&amp;_exception(Impl &amp;&amp;) noexcept</code></a>
<p>Returns a reference to the exception in the implementation passed in. Constexpr, neve