code>static void _set_has_exception(Impl &amp;&amp;, bool) noexcept</code></a>
<p>Sets whether the implementation has an exception. Constexpr, never throws.</p><li>
	<a href="../reference/policies/base/set_has_error_is_errno.html" ><code>static void _set_has_exception(Impl &amp;&amp;, bool) noexcept</code></a>
<p>Sets whether the implementation&rsquo;s error code has a domain or category matching that of POSIX <code>errno</code>. Constexpr, never throws.</p><li>
	<a href="../reference/policies/base/narrow_v