s the erased type to the alias <code>system_code</code>,
the <code>to_string()</code> function returns (in concrete types) <code>basic_result&lt;size_t, status_code&lt;erased&lt;intptr_t&gt;&gt;&gt;</code>.</p>

<p>The standard Outcome function referenced is documented at

<a href="https://en.cppreference.com/w/cpp/error/error_code" class="api-reference" target="_blank"><i class="fa fa-book" aria-hidden="true"></i> <code>std::error_code error_from_exception(std::exception_ptr &amp;&amp;ep = std::current_exc