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<p class='location'>Struct Env</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.filter">filter</a><a href="#method.filter_or">filter_or</a><a href="#method.write_style">write_style</a><a href="#method.write_style_or">write_style_or</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Default">Default</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='index.html'>env_logger</a></p><script>window.sidebarCurrent = {name: 'Env', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content"><h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>env_logger</a>::<wbr><a class="struct" href=''>Env</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/env_logger/lib.rs.html#231-234' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct Env<'a> { /* fields omitted */ }</pre></div><div class='docblock'><p>Set of environment variables to configure from.</p>
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<h1 id="default-environment-variables" class="section-header"><a href="#default-environment-variables">Default environment variables</a></h1>
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<p>By default, the <code>Env</code> will read the following environment variables:</p>
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<ul>
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<li><code>RUST_LOG</code>: the level filter</li>
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<li><code>RUST_LOG_STYLE</code>: whether or not to print styles with records.</li>
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</ul>
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<p>These sources can be configured using the builder methods on <code>Env</code>.</p>
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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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<h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> <a class="struct" href="../env_logger/struct.Env.html" title="struct env_logger::Env">Env</a><'a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#834-893' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new' class='fnname'>new</a>() -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#836-838' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Get a default set of environment variables.</p>
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</div><h4 id='method.filter' class="method"><span id='filter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.filter' class='fnname'>filter</a><E>(self, filter_env: E) -> Self <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#841-848' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Specify an environment variable to read the filter from.</p>
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</div><h4 id='method.filter_or' class="method"><span id='filter_or.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.filter_or' class='fnname'>filter_or</a><E, V>(self, filter_env: E, default: V) -> Self <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>,<br> V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#853-861' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Specify an environment variable to read the filter from.</p>
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<p>If the variable is not set, the default value will be used.</p>
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</div><h4 id='method.write_style' class="method"><span id='write_style.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.write_style' class='fnname'>write_style</a><E>(self, write_style_env: E) -> Self <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#868-875' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Specify an environment variable to read the style from.</p>
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</div><h4 id='method.write_style_or' class="method"><span id='write_style_or.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.write_style_or' class='fnname'>write_style_or</a><E, V>(self, write_style_env: E, default: V) -> Self <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>,<br> V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#880-888' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Specify an environment variable to read the style from.</p>
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<p>If the variable is not set, the default value will be used.</p>
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<h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><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="../env_logger/struct.Env.html" title="struct env_logger::Env">Env</a><'a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#230' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><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></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#230' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><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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</div></div><h3 id='impl-From%3CT%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for <a class="struct" href="../env_logger/struct.Env.html" title="struct env_logger::Env">Env</a><'a> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code><a href='#impl-From%3CT%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#926-933' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(filter_env: T) -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#930-932' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-Default' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="../env_logger/struct.Env.html" title="struct env_logger::Env">Env</a><'a></code><a href='#impl-Default' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#935-942' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.default' class="method"><span id='default.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default' class='fnname'>default</a>() -> Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/env_logger/lib.rs.html#936-941' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the "default value" for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
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