<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `ToPrimitive` trait in crate `num_traits`."><metaname="keywords"content="rust, rustlang, rust-lang, ToPrimitive"><title>num_traits::ToPrimitive - Rust</title><linkrel="stylesheet"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../dark.css"><linkrel="stylesheet"type="text/css"href="../light.css"id="themeStyle"><scriptsrc="../storage.js"></script><noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="shortcut icon"href="../favicon.ico"><styletype="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><bodyclass="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><ahref='../num_traits/index.html'><divclass='logo-container'><imgsrc='../rust-logo.png'alt='logo'></div></a><pclass='location'>Trait ToPrimitive</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#required-methods">Required Methods</a><divclass="sidebar-links"><ahref="#tymethod.to_i64">to_i64</a><ahref="#tymethod.to_u64">to_u64</a></div><aclass="sidebar-title"href="#provided-methods">Provided Methods</a><divclass="sidebar-links"><ahref="#method.to_f32">to_f32</a><ahref="#method.to_f64">to_f64</a><ahref="#method.to_i128">to_i128</a><ahref="#method.to_i16">to_i16</a><ahref="#method.to_i32">to_i32</a><ahref="#method.to_i8">to_i8</a><ahref="#method.to_isize">to_isize</a><ahref="#method.to_u128">to_u128</a><ahref="#method.to_u16">to_u16</a><ahref="#method.to_u32">to_u32</a><ahref="#method.to_u8">to_u8</a><ahref="#method.to_usize">to_usize</a></div><aclass="sidebar-title"href="#foreign-impls">Implementations on Foreign Types</a><divclass="sidebar-links"><ahref="#impl-ToPrimitive-for-Wrapping%3CT%3E">Wrapping<T></a><ahref="#impl-ToPrimitive-for-f32">f32</a><ahref="#impl-ToPrimitive-for-f64">f64</a><ahref="#impl-ToPrimitive-for-i128">i128</a><ahref="#impl-ToPrimitive-for-i16">i16</a><ahref="#impl-ToPrimitive-for-i32">i32</a><ahref="#impl-ToPrimitive-for-i64">i64</a><ahref="#impl-ToPrimitive-for-i8">i8</a><ahref="#impl-ToPrimitive-for-isize">isize</a><ahref="#impl-ToPrimitive-for-u128">u128</a><ahref="#impl-ToPrimitive-for-u16">u16</a><ahref="#impl-ToPrimitive-for-u32">u32</a><ahref="#impl-ToPrimitive-for-u64">u64</a><ahref="#impl-ToPrimitive-for-u8">u8</a><ahref="#impl-ToPrimitive-for-usize">usize</a></div><aclass="sidebar-title"href="#implementors">Implementors</a></div><pclass='location'><ahref='index.html'>num_traits</a></p><script>window.sidebarCurrent={name:'ToPrimitive',ty:'trait',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><aid="settings-menu"href="../settings.html"><imgsrc="../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../src/num_traits/cast.rs.htm
}</pre></div><divclass='docblock'><p>A generic trait for converting a value to a number.</p>
</div>
<h2id='required-methods'class='small-section-header'>Required methods<ahref='#required-methods'class='anchor'></a></h2><divclass='methods'><h3id='tymethod.to_i64'class='method'><codeid='to_i64.v'>fn <ahref='#tymethod.to_i64'class='fnname'>to_i64</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>i64</code>.</p>
</div><h3id='tymethod.to_u64'class='method'><codeid='to_u64.v'>fn <ahref='#tymethod.to_u64'class='fnname'>to_u64</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>u64</code>.</p>
<h2id='provided-methods'class='small-section-header'>Provided methods<ahref='#provided-methods'class='anchor'></a></h2><divclass='methods'><h3id='method.to_isize'class='method'><codeid='to_isize.v'>fn <ahref='#method.to_isize'class='fnname'>to_isize</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>isize</code>.</p>
</div><h3id='method.to_i8'class='method'><codeid='to_i8.v'>fn <ahref='#method.to_i8'class='fnname'>to_i8</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>i8</code>.</p>
</div><h3id='method.to_i16'class='method'><codeid='to_i16.v'>fn <ahref='#method.to_i16'class='fnname'>to_i16</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>i16</code>.</p>
</div><h3id='method.to_i32'class='method'><codeid='to_i32.v'>fn <ahref='#method.to_i32'class='fnname'>to_i32</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>i32</code>.</p>
</div><h3id='method.to_i128'class='method'><codeid='to_i128.v'>fn <ahref='#method.to_i128'class='fnname'>to_i128</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>i128</code>.</p>
<p>This method is only available with feature <code>i128</code> enabled on Rust >= 1.26.</p>
<p>The default implementation converts through <code>to_i64()</code>. Types implementing
this trait should override this method if they can represent a greater range.</p>
</div><h3id='method.to_usize'class='method'><codeid='to_usize.v'>fn <ahref='#method.to_usize'class='fnname'>to_usize</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to a <code>usize</code>.</p>
</div><h3id='method.to_u8'class='method'><codeid='to_u8.v'>fn <ahref='#method.to_u8'class='fnname'>to_u8</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>u8</code>.</p>
</div><h3id='method.to_u16'class='method'><codeid='to_u16.v'>fn <ahref='#method.to_u16'class='fnname'>to_u16</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>u16</code>.</p>
</div><h3id='method.to_u32'class='method'><codeid='to_u32.v'>fn <ahref='#method.to_u32'class='fnname'>to_u32</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>u32</code>.</p>
</div><h3id='method.to_u128'class='method'><codeid='to_u128.v'>fn <ahref='#method.to_u128'class='fnname'>to_u128</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.u128.html">u128</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>u128</code>.</p>
<p>This method is only available with feature <code>i128</code> enabled on Rust >= 1.26.</p>
<p>The default implementation converts through <code>to_u64()</code>. Types implementing
this trait should override this method if they can represent a greater range.</p>
</div><h3id='method.to_f32'class='method'><codeid='to_f32.v'>fn <ahref='#method.to_f32'class='fnname'>to_f32</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>f32</code>.</p>
</div><h3id='method.to_f64'class='method'><codeid='to_f64.v'>fn <ahref='#method.to_f64'class='fnname'>to_f64</a>(&self) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>></code></h3><divclass='docblock'><p>Converts the value of <code>self</code> to an <code>f64</code>.</p>
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