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<meta name="description" content="API documentation for the Rust `Record` struct in crate `log`.">
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<title>log::Record - Rust</title>
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<div class="sidebar-menu">☰</div>
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<a href='../log/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a>
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<p class='location'>Struct Record</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.builder">builder</a><a href="#method.args">args</a><a href="#method.metadata">metadata</a><a href="#method.level">level</a><a href="#method.target">target</a><a href="#method.module_path">module_path</a><a href="#method.file">file</a><a href="#method.line">line</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a></div></div><p class='location'><a href='index.html'>log</a></p><script>window.sidebarCurrent = {name: 'Record', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>log</a>::<wbr><a class="struct" href=''>Record</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../src/log/lib.rs.html#710-716' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct Record<'a> { /* fields omitted */ }</pre><div class='docblock'><p>The "payload" of a log message.</p>
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<h1 id="use" class="section-header"><a href="#use">Use</a></h1>
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<p><code>Record</code> structures are passed as parameters to the <a href="trait.Log.html#tymethod.log"><code>log</code></a>
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method of the <a href="trait.Log.html"><code>Log</code></a> trait. Logger implementors manipulate these
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structures in order to display log messages. <code>Record</code>s are automatically
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created by the <a href="macro.log.html"><code>log!</code></a> macro and so are not seen by log users.</p>
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<p>Note that the <a href="struct.Record.html#method.level"><code>level()</code></a> and <a href="struct.Record.html#method.target"><code>target()</code></a> accessors are equivalent to
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<code>self.metadata().level()</code> and <code>self.metadata().target()</code> respectively.
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These methods are provided as a convenience for users of this structure.</p>
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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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<p>The following example shows a simple logger that displays the level,
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module path, and message of any <code>Record</code> that is passed to it.</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">struct</span> <span class="ident">SimpleLogger</span>;
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<span class="kw">impl</span> <span class="ident">log</span>::<span class="ident">Log</span> <span class="kw">for</span> <span class="ident">SimpleLogger</span> {
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<span class="kw">fn</span> <span class="ident">enabled</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">metadata</span>: <span class="kw-2">&</span><span class="ident">log</span>::<span class="ident">Metadata</span>) <span class="op">-></span> <span class="ident">bool</span> {
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<span class="bool-val">true</span>
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}
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<span class="kw">fn</span> <span class="ident">log</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">record</span>: <span class="kw-2">&</span><span class="ident">log</span>::<span class="ident">Record</span>) {
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<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">enabled</span>(<span class="ident">record</span>.<span class="ident">metadata</span>()) {
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<span class="kw">return</span>;
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}
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{}:{} -- {}"</span>,
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<span class="ident">record</span>.<span class="ident">level</span>(),
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<span class="ident">record</span>.<span class="ident">target</span>(),
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<span class="ident">record</span>.<span class="ident">args</span>());
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}
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<span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&</span><span class="self">self</span>) {}
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}</pre>
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</div>
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<h2 id='methods' class='small-section-header'>
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Methods<a href='#methods' class='anchor'></a>
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</h2>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl<'a> <a class="struct" href="../log/struct.Record.html" title="struct log::Record">Record</a><'a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#718-766' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.builder' class="method"><span id='builder.v' class='invisible'><code>pub fn <a href='#method.builder' class='fnname'>builder</a>() -> <a class="struct" href="../log/struct.RecordBuilder.html" title="struct log::RecordBuilder">RecordBuilder</a><'a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#721-723' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Returns a new builder.</p>
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</div><h4 id='method.args' class="method"><span id='args.v' class='invisible'><code>pub fn <a href='#method.args' class='fnname'>args</a>(&self) -> &<a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Arguments.html" title="struct core::fmt::Arguments">Arguments</a><'a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#727-729' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The message body.</p>
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</div><h4 id='method.metadata' class="method"><span id='metadata.v' class='invisible'><code>pub fn <a href='#method.metadata' class='fnname'>metadata</a>(&self) -> &<a class="struct" href="../log/struct.Metadata.html" title="struct log::Metadata">Metadata</a><'a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#733-735' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Metadata about the log directive.</p>
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</div><h4 id='method.level' class="method"><span id='level.v' class='invisible'><code>pub fn <a href='#method.level' class='fnname'>level</a>(&self) -> <a class="enum" href="../log/enum.Level.html" title="enum log::Level">Level</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#739-741' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The verbosity level of the message.</p>
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</div><h4 id='method.target' class="method"><span id='target.v' class='invisible'><code>pub fn <a href='#method.target' class='fnname'>target</a>(&self) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#745-747' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The name of the target of the directive.</p>
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</div><h4 id='method.module_path' class="method"><span id='module_path.v' class='invisible'><code>pub fn <a href='#method.module_path' class='fnname'>module_path</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#751-753' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The module path of the message.</p>
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</div><h4 id='method.file' class="method"><span id='file.v' class='invisible'><code>pub fn <a href='#method.file' class='fnname'>file</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#757-759' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The source file containing the message.</p>
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</div><h4 id='method.line' class="method"><span id='line.v' class='invisible'><code>pub fn <a href='#method.line' class='fnname'>line</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#763-765' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The line containing the message.</p>
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</div></div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-Clone' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../log/struct.Record.html" title="struct log::Record">Record</a><'a></code><a href='#impl-Clone' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#709' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="struct" href="../log/struct.Record.html" title="struct log::Record">Record</a><'a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#709' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</code></span><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#112-114' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../log/struct.Record.html" title="struct log::Record">Record</a><'a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#709' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, __arg_0: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/log/lib.rs.html#709' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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