| <!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 `error` macro in crate `log`."> |
| <meta name="keywords" content="rust, rustlang, rust-lang, error"> |
| |
| <title>log::error - Rust</title> |
| |
| <link rel="stylesheet" type="text/css" href="../normalize.css"> |
| <link rel="stylesheet" type="text/css" href="../rustdoc.css"> |
| <link rel="stylesheet" type="text/css" href="../main.css"> |
| |
| |
| <link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"> |
| |
| </head> |
| <body class="rustdoc macro"> |
| <!--[if lte IE 8]> |
| <div class="warning"> |
| This old browser is unsupported and will most likely display funky |
| things. |
| </div> |
| <![endif]--> |
| |
| |
| |
| <nav class="sidebar"> |
| <a href='../log/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a> |
| <p class='location'><a href='index.html'>log</a></p><script>window.sidebarCurrent = {name: 'error', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script> |
| </nav> |
| |
| <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'>Macro <a href='index.html'>log</a>::<wbr><a class="macro" href=''>error</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'>−</span>] |
| </a> |
| </span><a class='srclink' href='../src/log/macros.rs.html#67-74' title='goto source code'>[src]</a></span></h1> |
| <pre class="rust macro"> |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">error</span> { |
| (<span class="ident">target</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">target</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=></span> { ... }; |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=></span> { ... }; |
| }</pre> |
| <div class='docblock'><p>Logs a message at the error level.</p> |
| |
| <p>Logging at this level is disabled if the <code>max_level_off</code> feature is present.</p> |
| |
| <h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1> |
| <pre class="rust rust-example-rendered"> |
| <span class="kw">let</span> (<span class="ident">err_info</span>, <span class="ident">port</span>) <span class="op">=</span> (<span class="string">"No connection"</span>, <span class="number">22</span>); |
| |
| <span class="macro">error</span><span class="macro">!</span>(<span class="string">"Error: {} on port {}"</span>, <span class="ident">err_info</span>, <span class="ident">port</span>); |
| <span class="macro">error</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"app_events"</span>, <span class="string">"App Error: {}, Port: {}"</span>, <span class="ident">err_info</span>, <span class="number">22</span>);</pre> |
| </div></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>?</dt> |
| <dd>Show this help dialog</dd> |
| <dt>S</dt> |
| <dd>Focus the search field</dd> |
| <dt>⇤</dt> |
| <dd>Move up in search results</dd> |
| <dt>⇥</dt> |
| <dd>Move down in search results</dd> |
| <dt>⏎</dt> |
| <dd>Go to active search result</dd> |
| <dt>+</dt> |
| <dd>Collapse/expand 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 = "log"; |
| </script> |
| <script src="../main.js"></script> |
| <script defer src="../search-index.js"></script> |
| </body> |
| </html> |
