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<title>is_error_type_enum&lt;E, Enum&gt; - Boost.Outcome documentation</title>
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  <div class="titlepage"><div><div><h1 style="clear: both"><code>is_error_type_enum&lt;E, Enum&gt;</code></h1></div></div></div>
  <p>A customisable integral constant type true for <code>E</code> types constructible from <code>Enum</code> types which are to receive error throwing no-value policies</p>

<p><em>Overridable</em>: By template specialisation into the <code>trait</code> namespace.</p>

<p><em>Default</em>: False. Specialisations exist for:</p>

<ul>
<li><p><code>&lt;boost/outcome/boost_result.hpp&gt;</code></p>

<ul>
<li><code>boost::system::error_code</code> to <code>boost::system::is_error_condition_enum&lt;Enum&gt;::value</code>.</li>
</ul></li>

<li><p><code>&lt;boost/outcome/std_result.hpp&gt;</code></p>

<ul>
<li><code>std::error_code</code> to <code>std::is_error_condition_enum&lt;Enum&gt;::value</code>.</li>
</ul></li>
</ul>

<p><em>Namespace</em>: <code>BOOST_OUTCOME_V2_NAMESPACE::trait</code></p>

<p><em>Header</em>: <code>&lt;boost/outcome/trait.hpp&gt;</code></p>


        </div><p><small>Last revised: December 13, 2018 at 17:36:11 UTC</small></p>
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