<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `resume_unwind` fn in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, resume_unwind"><title>std::panic::resume_unwind - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>panic</a></p><script>window.sidebarCurrent = {name: 'resume_unwind', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>std</a>::<wbr><a href='index.html'>panic</a>::<wbr><a class="fn" href=''>resume_unwind</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.9.0'>1.9.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/std/panic.rs.html#424-426' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub fn resume_unwind(payload: <a class="struct" href="../../std/boxed/struct.Box.html" title="struct std::boxed::Box">Box</a><<a class="trait" href="../../std/any/trait.Any.html" title="trait std::any::Any">Any</a> + <a class="trait" href="../../std/marker/trait.Send.html" title="trait std::marker::Send">Send</a>>) -> <a class="primitive" href="../primitive.never.html">!</a></pre><div class='docblock'><p>Triggers a panic without invoking the panic hook.</p>
<p>This is designed to be used in conjunction with <a href="./fn.catch_unwind.html"><code>catch_unwind</code></a> to, for
example, carry a panic across a layer of C code.</p>
<h1 id="notes" class="section-header"><a href="#notes">Notes</a></h1>
<p>Note that panics in Rust are not always implemented via unwinding, but they
may be implemented by aborting the process. If this function is called when
panics are implemented this way then this function will abort the process,
not trigger an unwind.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">panic</span>;
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">panic</span>::<span class="ident">catch_unwind</span>(<span class="op">||</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"oh no!"</span>);
});
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span> <span class="ident">result</span> {
<span class="ident">panic</span>::<span class="ident">resume_unwind</span>(<span class="ident">err</span>);
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Ause%20std%3A%3Apanic%3B%0A%0Alet%20result%20%3D%20panic%3A%3Acatch_unwind(%7C%7C%20%7B%0A%20%20%20%20panic!(%22oh%20no!%22)%3B%0A%7D)%3B%0A%0Aif%20let%20Err(err)%20%3D%20result%20%7B%0A%20%20%20%20panic%3A%3Aresume_unwind(err)%3B%0A%7D%0A%7D">Run</a></pre>
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