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>success_type<T> - 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/types/awaitables/lazy.html"><img src="../../images/prev.png" alt="Prev"></a> 11 <a accesskey="u" href="../../reference/types.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/aliases.html"><img src="../../images/next.png" alt="Next"></a></div><div id="content"> 13 <div class="titlepage"><div><div><h1 style="clear: both"><code>success_type<T></code></h1></div></div></div> 14 <p>Type sugar for constructing a successful result or outcome. Generally not constructed directly, but via the free function <a href="../../reference/functions/success.html" class="api-reference"><code>success(T &&)</code></a> 15. Detectable using <a href="../../reference/traits/is_success_type.html" class="api-reference"><code>is_success_type<T></code></a> 16.</p> 17 18<p>This is a regular wrapper type, with defaulted default, copy and move constructor, defaulted assignment, and defaulted destructor.</p> 19 20<p>A member type alias <code>value_type</code> indicates <code>T</code>.</p> 21 22<p>There is an explicit initialising constructor taking any type <code>U</code> which is not a <code>success_type<T></code>, and which will forward construct the contained <code>T</code> from that <code>U</code>.</p> 23 24<p>There is a <code>.value()</code> reference observer with the usual constexpr lvalue, const lvalue, rvalue and const rvalue overloads.</p> 25 26<p>There is a specialisation <code>success_type<void></code> which stores nothing and provides no <code>.value()</code> observers.</p> 27 28<p><em>Requires</em>: Nothing.</p> 29 30<p><em>Namespace</em>: <code>BOOST_OUTCOME_V2_NAMESPACE</code></p> 31 32<p><em>Header</em>: <code><boost/outcome/success_failure.hpp></code></p> 33 34 35 </div><p><small>Last revised: January 21, 2019 at 18:00:41 UTC</small></p> 36<hr> 37<div class="spirit-nav"> 38<a accesskey="p" href="../../reference/types/awaitables/lazy.html"><img src="../../images/prev.png" alt="Prev"></a> 39 <a accesskey="u" href="../../reference/types.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/aliases.html"><img src="../../images/next.png" alt="Next"></a></div></body> 41</html> 42
