1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html><meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 3<title>error_code_throw_as_system_error<T, EC, EP> - Boost.Outcome documentation</title> 4<link rel="stylesheet" href="../../css/boost.css" type="text/css"> 5<meta name="generator" content="Hugo 0.52 with Boostdoc theme"> 6<meta name="viewport" content="width=device-width,initial-scale=1.0"/> 7 8<link rel="icon" href="../../images/favicon.ico" type="image/ico"/> 9<body><div class="spirit-nav"> 10<a accesskey="p" href="../../reference/policies/all_narrow.html"><img src="../../images/prev.png" alt="Prev"></a> 11 <a accesskey="u" href="../../reference/policies.html"><img src="../../images/up.png" alt="Up"></a> 12 <a accesskey="h" href="../../index.html"><img src="../../images/home.png" alt="Home"></a><a accesskey="n" href="../../reference/policies/error_code_throw_as_system_error_result.html"><img src="../../images/next.png" alt="Next"></a></div><div id="content"> 13 <div class="titlepage"><div><div><h1 style="clear: both"><code>error_code_throw_as_system_error<T, EC, EP></code></h1></div></div></div> 14 <p><em>Note</em>: This policy class specialisation can only be used with <code>basic_outcome</code>, not <code>basic_result</code>. Use <a href="../../reference/policies/error_code_throw_as_system_error_result.html" class="api-reference"><code>error_code_throw_as_system_error<T, EC, void></code></a> 15 with <code>basic_result</code>.</p> 16 17<p>Policy class defining that on incorrect wide value observation, <code>EP</code> ought to be rethrown if possible, then the ADL discovered free function <code>outcome_throw_as_system_error_with_payload(impl.assume_error())</code> should be called. <a href="../../reference/functions/policy.html">Some precanned overloads of that function are listed here</a>.</p> 18 19<p>Incorrect wide error observation performs:</p> 20<div class="highlight"><pre class="chroma"><code class="language-c++" data-lang="c++"><span class="n">BOOST_OUTCOME_THROW_EXCEPTION</span><span class="p">(</span><span class="n">bad_outcome_access</span><span class="p">(</span><span class="s">"no error"</span><span class="p">));</span> 21</code></pre></div> 22<p>Incorrect wide exception observation performs:</p> 23<div class="highlight"><pre class="chroma"><code class="language-c++" data-lang="c++"><span class="n">BOOST_OUTCOME_THROW_EXCEPTION</span><span class="p">(</span><span class="n">bad_outcome_access</span><span class="p">(</span><span class="s">"no exception"</span><span class="p">));</span> 24</code></pre></div> 25<p>Inherits publicly from <a href="../../reference/policies/base.html" class="api-reference"><code>base</code></a> 26, and its narrow value, error and exception observer policies are inherited from there.</p> 27 28<p><em>Requires</em>: Nothing.</p> 29 30<p><em>Namespace</em>: <code>BOOST_OUTCOME_V2_NAMESPACE::policy</code></p> 31 32<p><em>Header</em>: <code><boost/outcome/policy/outcome_error_code_throw_as_system_error.hpp></code></p> 33 34 35 </div><p><small>Last revised: February 01, 2019 at 23:42:52 UTC</small></p> 36<hr> 37<div class="spirit-nav"> 38<a accesskey="p" href="../../reference/policies/all_narrow.html"><img src="../../images/prev.png" alt="Prev"></a> 39 <a accesskey="u" href="../../reference/policies.html"><img src="../../images/up.png" alt="Up"></a> 40 <a accesskey="h" href="../../index.html"><img src="../../images/home.png" alt="Home"></a><a accesskey="n" href="../../reference/policies/error_code_throw_as_system_error_result.html"><img src="../../images/next.png" alt="Next"></a></div></body> 41</html> 42
