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<title>static void narrow_error_check(Impl &amp;&amp;) noexcept - Boost.Outcome documentation</title>
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  <div class="titlepage"><div><div><h1 style="clear: both"><code>static void narrow_error_check(Impl &amp;&amp;) noexcept</code></h1></div></div></div>
  <p>Observer policy performing hard UB if no error is present, by calling <a href="../../../reference/policies/base/ub.html" class="api-reference"><code>static void _ub(Impl &amp;&amp;)</code></a>
. Constexpr where possible.</p>

<p><em>Requires</em>: Always available.</p>

<p><em>Complexity</em>: Constant time.</p>

<p><em>Guarantees</em>: Never throws an exception.</p>


        </div><p><small>Last revised: January 22, 2019 at 01:11:40 UTC</small></p>
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