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<p class='location'><a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>fmt</a></p><script>window.sidebarCurrent = {name: 'LowerExp', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>fmt</a>::<wbr><a class='trait' href=''>LowerExp</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a id='src-35573' class='srclink' href='https://doc.rust-lang.org/nightly/core/fmt/trait.LowerExp.html?gotosrc=35573' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait LowerExp {
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fn <a href='#tymethod.fmt' class='fnname'>fmt</a>(&self, &mut <a class='struct' href='../../../bitflags/__core/fmt/struct.Formatter.html' title='bitflags::__core::fmt::Formatter'>Formatter</a>) -> <a class='enum' href='../../../bitflags/__core/result/enum.Result.html' title='bitflags::__core::result::Result'>Result</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.tuple.html'>()</a>, <a class='struct' href='../../../bitflags/__core/fmt/struct.Error.html' title='bitflags::__core::fmt::Error'>Error</a>>;
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}</pre><div class='docblock'><p>Format trait for the <code>e</code> character.</p>
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<p>The <code>LowerExp</code> trait should format its output in scientific notation with a lower-case <code>e</code>.</p>
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<p>For more information on formatters, see <a href="../../std/fmt/index.html">the module-level documentation</a>.</p>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<p>Basic usage with <code>i32</code>:</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>let</span> <span class='ident'>x</span> <span class='op'>=</span> <span class='number'>42.0</span>; <span class='comment'>// 42.0 is '4.2e1' in scientific notation</span>
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<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='macro'>format</span><span class='macro'>!</span>(<span class='string'>"{:e}"</span>, <span class='ident'>x</span>), <span class='string'>"4.2e1"</span>);</pre>
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<p>Implementing <code>LowerExp</code> on a type:</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>;
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<span class='kw'>struct</span> <span class='ident'>Length</span>(<span class='ident'>i32</span>);
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<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>LowerExp</span> <span class='kw'>for</span> <span class='ident'>Length</span> {
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<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> {
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<span class='kw'>let</span> <span class='ident'>val</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='number'>0</span>;
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<span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>f</span>, <span class='string'>"{}e1"</span>, <span class='ident'>val</span> <span class='op'>/</span> <span class='number'>10</span>)
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}
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}
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<span class='kw'>let</span> <span class='ident'>l</span> <span class='op'>=</span> <span class='ident'>Length</span>(<span class='number'>100</span>);
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<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>"l in scientific notation is: {:e}"</span>, <span class='ident'>l</span>);</pre>
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</div>
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<h2 id='required-methods'>Required Methods</h2>
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<div class='methods'>
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<h3 id='tymethod.fmt' class='method stab '><code>fn <a href='#tymethod.fmt' class='fnname'>fmt</a>(&self, &mut <a class='struct' href='../../../bitflags/__core/fmt/struct.Formatter.html' title='bitflags::__core::fmt::Formatter'>Formatter</a>) -> <a class='enum' href='../../../bitflags/__core/result/enum.Result.html' title='bitflags::__core::result::Result'>Result</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.tuple.html'>()</a>, <a class='struct' href='../../../bitflags/__core/fmt/struct.Error.html' title='bitflags::__core::fmt::Error'>Error</a>></code></h3><div class='docblock'><p>Formats the value using the given formatter.</p>
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<h2 id='implementors'>Implementors</h2>
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<ul class='item-list' id='implementors-list'>
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<li><code>impl LowerExp for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.f64.html'>f64</a></code></li>
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<li><code>impl LowerExp for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.f32.html'>f32</a></code></li>
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