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<title>bad_result_access_with&lt;EC&gt; - Boost.Outcome documentation</title>
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  <div class="titlepage"><div><div><h1 style="clear: both"><code>bad_result_access_with&lt;EC&gt;</code></h1></div></div></div>
  <p>Exception type publicly inheriting from <a href="../../reference/types/bad_result_access.html" class="api-reference"><code>bad_result_access</code></a>
, and thus also 
<a href="https://en.cppreference.com/w/cpp/error/logic_error" class="api-reference" target="_blank"><i class="fa fa-book" aria-hidden="true"></i> <code>std::logic_error</code></a>
, indicating an incorrect observation of value occurred. The error value at the time of the exception throw is moved or copied into this type, and is available using the <code>.error()</code> observer which comes in lvalue ref, const lvalue ref, rvalue ref, and const rvalue ref overloads.</p>

<p>The primary purpose of this exception type is to enable standing in for 
<a href="https://wg21.link/P0323" class="api-reference" target="_blank"><i class="fa fa-book" aria-hidden="true"></i> P0323 <code>std::expected&lt;T, E&gt;</code></a>
&rsquo;s <code>bad_expected_access&lt;E&gt;</code> which is thrown on incorrect wide value observation. This is why it is only ever <code>EC</code> which is thrown with <code>bad_result_access_with&lt;EC&gt;</code> on value observation only, and only when there is an error available. See the <a href="../../reference/policies/throw_bad_result_access.html" class="api-reference"><code>throw_bad_result_access&lt;EC&gt;</code></a>
 policy for more information.</p>

<p><em>Requires</em>: Nothing.</p>

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

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


        </div><p><small>Last revised: January 25, 2019 at 01:51:37 UTC</small></p>
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