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<p class='location'>Trait NumCast</p><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.from">from</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-NumCast">u8</a><a href="#impl-NumCast">u16</a><a href="#impl-NumCast">isize</a><a href="#impl-NumCast">i16</a><a href="#impl-NumCast">f32</a><a href="#impl-NumCast">u32</a><a href="#impl-NumCast">usize</a><a href="#impl-NumCast">i8</a><a href="#impl-NumCast">f64</a><a href="#impl-NumCast">u64</a><a href="#impl-NumCast">i64</a><a href="#impl-NumCast">i32</a><a href="#impl-NumCast">Wrapping<T></a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>num</a></p><script>window.sidebarCurrent = {name: 'NumCast', 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'>num</a>::<wbr><a class="trait" href=''>NumCast</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>]
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</span><a class='srclink' href='../src/num_traits/cast.rs.html#416-420' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait NumCast: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a> {
fn <a href='#tymethod.from' class='fnname'>from</a><T>(n: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self><br> <span class="where">where<br> T: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a></span>;
}</pre><div class='docblock'><p>An interface for casting between machine scalars.</p>
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<h2 id='required-methods' class='small-section-header'>
Required Methods<a href='#required-methods' class='anchor'></a>
</h2>
<div class='methods'>
<h3 id='tymethod.from' class='method'><span id='from.v' class='invisible'><code>fn <a href='#tymethod.from' class='fnname'>from</a><T>(n: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self> <span class="where fmt-newline">where<br> T: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span></h3><div class='docblock'><p>Creates a number from another value that can be converted into
a primitive via the <code>ToPrimitive</code> trait.</p>
</div></div>
<h2 id='foreign-impls' class='small-section-header'>
Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
</h2>
<h3 id='impl-NumCast' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a></code><a href='#impl-NumCast' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from' class="method"><span id='from.v-1' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.u8.html">u8</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-1' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a></code><a href='#impl-NumCast-1' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-1' class="method"><span id='from.v-2' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.u16.html">u16</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-2' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code><a href='#impl-NumCast-2' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-2' class="method"><span id='from.v-3' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.isize.html">isize</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-3' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a></code><a href='#impl-NumCast-3' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-3' class="method"><span id='from.v-4' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.i16.html">i16</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-4' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a></code><a href='#impl-NumCast-4' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-4' class="method"><span id='from.v-5' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.f32.html">f32</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-5' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a></code><a href='#impl-NumCast-5' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-5' class="method"><span id='from.v-6' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-6' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code><a href='#impl-NumCast-6' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-6' class="method"><span id='from.v-7' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.usize.html">usize</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-7' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code><a href='#impl-NumCast-7' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-7' class="method"><span id='from.v-8' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.i8.html">i8</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-8' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a></code><a href='#impl-NumCast-8' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-8' class="method"><span id='from.v-9' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.f64.html">f64</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-9' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a></code><a href='#impl-NumCast-9' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-9' class="method"><span id='from.v-10' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.u64.html">u64</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-10' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a></code><a href='#impl-NumCast-10' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-10' class="method"><span id='from.v-11' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.i64.html">i64</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-11' class='impl'><span class='in-band'><code>impl <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code><a href='#impl-NumCast-11' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#424-432' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-11' class="method"><span id='from.v-12' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><N>(n: N) -> <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.i32.html">i32</a>> <span class="where fmt-newline">where<br> N: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#427-431' title='goto source code'>[src]</a></span></h4>
</div></span><h3 id='impl-NumCast-12' class='impl'><span class='in-band'><code>impl<T> <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="../num/cast/trait.NumCast.html" title="trait num::cast::NumCast">NumCast</a>, </span></code><a href='#impl-NumCast-12' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#449-453' title='goto source code'>[src]</a></span></h3>
<span class='docblock autohide'><div class='impl-items'><h4 id='method.from-12' class="method"><span id='from.v-13' class='invisible'><code>fn <a href='#method.from' class='fnname'>from</a><U>(n: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/core/num/struct.Wrapping.html" title="struct core::num::Wrapping">Wrapping</a><T>> <span class="where fmt-newline">where<br> U: <a class="trait" href="../num/cast/trait.ToPrimitive.html" title="trait num::cast::ToPrimitive">ToPrimitive</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/num_traits/cast.rs.html#450-452' title='goto source code'>[src]</a></span></h4>
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<h2>Search Tricks</h2>
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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>
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