<!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 `failure` crate.">
    <meta name="keywords" content="rust, rustlang, rust-lang, failure">

    <title>failure - 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="../main.css" id="themeStyle">
    <script src="../storage.js"></script>
    

    
    
</head>
<body class="rustdoc mod">
    <!--[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">&#9776;</div>
        
        <p class='location'>Crate failure</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#macros">Macros</a></li><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'failure', ty: 'mod', relpath: '../'};</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">
            </div>
        </form>
    </nav>

    <section id='main' class="content">
<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>failure</a></span><span class='out-of-band'><span id='render-detail'>
                   <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
                       [<span class='inner'>&#x2212;</span>]
                   </a>
               </span><a class='srclink' href='../src/failure/lib.rs.html#1-229' title='goto source code'>[src]</a></span></h1>
<div class='docblock'><p>An experimental new error-handling library.</p>
<p>The primary items exported by this library are:</p>
<ul>
<li><code>Fail</code>: a new trait for custom error types in Rust.</li>
<li><code>Error</code>: a wrapper around <code>Fail</code> types to make it easy to coalesce them
at higher levels.</li>
</ul>
<p>As a general rule, library authors should create their own error types and
implement <code>Fail</code> for them, whereas application authors should primarily
deal with the <code>Error</code> type. There are exceptions to this rule, though, in
both directions, and users should do whatever seems most appropriate to
their situation.</p>
</div><h2 id='macros' class='section-header'><a href="#macros">Macros</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="macro" href="macro.bail.html"
                                  title='macro failure::bail'>bail</a></td>
                           <td class='docblock-short'>
                                <p>Exits a function early with an <code>Error</code>.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="macro" href="macro.ensure.html"
                                  title='macro failure::ensure'>ensure</a></td>
                           <td class='docblock-short'>
                                <p>Exits a function early with an <code>Error</code> if the condition is not satisfied.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="macro" href="macro.format_err.html"
                                  title='macro failure::format_err'>format_err</a></td>
                           <td class='docblock-short'>
                                <p>Constructs an <code>Error</code> using the standard string interpolation syntax.</p>

                           </td>
                       </tr></table><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Backtrace.html"
                                  title='struct failure::Backtrace'>Backtrace</a></td>
                           <td class='docblock-short'>
                                <p>A <code>Backtrace</code>.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Causes.html"
                                  title='struct failure::Causes'>Causes</a></td>
                           <td class='docblock-short'>
                                <p>A iterator over the causes of a <code>Fail</code></p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Compat.html"
                                  title='struct failure::Compat'>Compat</a></td>
                           <td class='docblock-short'>
                                <p>A compatibility wrapper around an error type from this crate.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Context.html"
                                  title='struct failure::Context'>Context</a></td>
                           <td class='docblock-short'>
                                <p>An error with context around it.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Error.html"
                                  title='struct failure::Error'>Error</a></td>
                           <td class='docblock-short'>
                                <p>The <code>Error</code> type, which can contain any failure.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.SyncFailure.html"
                                  title='struct failure::SyncFailure'>SyncFailure</a></td>
                           <td class='docblock-short'>
                                <p>Wrapper for <code>std</code> errors to make them <code>Sync</code>.</p>

                           </td>
                       </tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="trait" href="trait.Fail.html"
                                  title='trait failure::Fail'>Fail</a></td>
                           <td class='docblock-short'>
                                <p>The <code>Fail</code> trait.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="trait" href="trait.ResultExt.html"
                                  title='trait failure::ResultExt'>ResultExt</a></td>
                           <td class='docblock-short'>
                                <p>Extension methods for <code>Result</code>.</p>

                           </td>
                       </tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
<table>
                       <tr class=' module-item'>
                           <td><a class="fn" href="fn.err_msg.html"
                                  title='fn failure::err_msg'>err_msg</a></td>
                           <td class='docblock-short'>
                                <p>Constructs a <code>Fail</code> type from a string.</p>

                           </td>
                       </tr></table></section>
    <section id='search' class="content hidden"></section>

    <section class="footer"></section>

    <aside id="help" class="hidden">
        <div>
            <h1 class="hidden">Help</h1>

            <div class="shortcuts">
                <h2>Keyboard Shortcuts</h2>

                <dl>
                    <dt><kbd>?</kbd></dt>
                    <dd>Show this help dialog</dd>
                    <dt><kbd>S</kbd></dt>
                    <dd>Focus the search field</dd>
                    <dt><kbd>↑</kbd></dt>
                    <dd>Move up in search results</dd>
                    <dt><kbd>↓</kbd></dt>
                    <dd>Move down in search results</dd>
                    <dt><kbd>↹</kbd></dt>
                    <dd>Switch tab</dd>
                    <dt><kbd>&#9166;</kbd></dt>
                    <dd>Go to active search result</dd>
                    <dt><kbd>+</kbd></dt>
                    <dd>Expand all sections</dd>
                    <dt><kbd>-</kbd></dt>
                    <dd>Collapse all sections</dd>
                </dl>
            </div>

            <div class="infos">
                <h2>Search Tricks</h2>

                <p>
                    Prefix searches with a type followed by a colon (e.g.
                    <code>fn:</code>) to restrict the search to a given type.
                </p>

                <p>
                    Accepted types are: <code>fn</code>, <code>mod</code>,
                    <code>struct</code>, <code>enum</code>,
                    <code>trait</code>, <code>type</code>, <code>macro</code>,
                    and <code>const</code>.
                </p>

                <p>
                    Search functions by type signature (e.g.
                    <code>vec -> usize</code> or <code>* -> vec</code>)
                </p>
            </div>
        </div>
    </aside>

    

    <script>
        window.rootPath = "../";
        window.currentCrate = "failure";
    </script>
    <script src="../main.js"></script>
    <script defer src="../search-index.js"></script>
</body>
</html>