<!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 `Log` trait in crate `log`."> <meta name="keywords" content="rust, rustlang, rust-lang, Log"> <title>log::Log - 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 trait"> <!--[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'>Trait Log</p><div class="block items"><ul><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='index.html'>log</a></p><script>window.sidebarCurrent = {name: 'Log', ty: 'trait', 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'>Trait <a href='index.html'>log</a>::<wbr><a class="trait" href=''>Log</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/lib.rs.html#571-586' title='goto source code'>[src]</a></span></h1> <pre class='rust trait'>pub trait Log: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> { fn <a href='#tymethod.enabled' class='fnname'>enabled</a>(&self, metadata: &<a class="struct" href="../log/struct.LogMetadata.html" title="struct log::LogMetadata">LogMetadata</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>; fn <a href='#tymethod.log' class='fnname'>log</a>(&self, record: &<a class="struct" href="../log/struct.LogRecord.html" title="struct log::LogRecord">LogRecord</a>); }</pre><div class='docblock'><p>A trait encapsulating the operations required of a logger</p> </div> <h2 id='required-methods'>Required Methods</h2> <div class='methods'> <h3 id='tymethod.enabled' class='method'><span id='enabled.v' class='invisible'><code>fn <a href='#tymethod.enabled' class='fnname'>enabled</a>(&self, metadata: &<a class="struct" href="../log/struct.LogMetadata.html" title="struct log::LogMetadata">LogMetadata</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></h3><div class='docblock'><p>Determines if a log message with the specified metadata would be logged.</p> <p>This is used by the <code>log_enabled!</code> macro to allow callers to avoid expensive computation of log message arguments if the message would be discarded anyway.</p> </div><h3 id='tymethod.log' class='method'><span id='log.v' class='invisible'><code>fn <a href='#tymethod.log' class='fnname'>log</a>(&self, record: &<a class="struct" href="../log/struct.LogRecord.html" title="struct log::LogRecord">LogRecord</a>)</code></span></h3><div class='docblock'><p>Logs the <code>LogRecord</code>.</p> <p>Note that <code>enabled</code> is <em>not</em> necessarily called before this method. Implementations of <code>log</code> should perform all necessary filtering internally.</p> </div></div> <h2 id='implementors'>Implementors</h2> <ul class='item-list' id='implementors-list'> </ul><script type="text/javascript" async src="../implementors/log/trait.Log.js"> </script></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>