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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `ToPrimitive` trait in crate `num_traits`."><meta name="keywords" content="rust, rustlang, rust-lang, ToPrimitive"><title>num_traits::cast::ToPrimitive - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../num_traits/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><p class='location'>Trait ToPrimitive</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.to_i64">to_i64</a><a href="#tymethod.to_u64">to_u64</a></div><a class="sidebar-title" href="#provided-methods">Provided Methods</a><div class="sidebar-links"><a href="#method.to_f32">to_f32</a><a href="#method.to_f64">to_f64</a><a href="#method.to_i128">to_i128</a><a href="#method.to_i16">to_i16</a><a href="#method.to_i32">to_i32</a><a href="#method.to_i8">to_i8</a><a href="#method.to_isize">to_isize</a><a href="#method.to_u128">to_u128</a><a href="#method.to_u16">to_u16</a><a href="#method.to_u32">to_u32</a><a href="#method.to_u8">to_u8</a><a href="#method.to_usize">to_usize</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-ToPrimitive-for-Wrapping%3CT%3E">Wrapping<T></a><a href="#impl-ToPrimitive-for-f32">f32</a><a href="#impl-ToPrimitive-for-f64">f64</a><a href="#impl-ToPrimitive-for-i128">i128</a><a href="#impl-ToPrimitive-for-i16">i16</a><a href="#impl-ToPrimitive-for-i32">i32</a><a href="#impl-ToPrimitive-for-i64">i64</a><a href="#impl-ToPrimitive-for-i8">i8</a><a href="#impl-ToPrimitive-for-isize">isize</a><a href="#impl-ToPrimitive-for-u128">u128</a><a href="#impl-ToPrimitive-for-u16">u16</a><a href="#impl-ToPrimitive-for-u32">u32</a><a href="#impl-ToPrimitive-for-u64">u64</a><a href="#impl-ToPrimitive-for-u8">u8</a><a href="#impl-ToPrimitive-for-usize">usize</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>num_traits</a>::<wbr><a href='index.html'>cast</a></p><script>window.sidebarCurrent = {name: 'ToPrimitive', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='i
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fn <a href='#tymethod.to_i64' class='fnname'>to_i64</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.i64.html">i64</a>>;
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<div class='item-spacer'></div> fn <a href='#tymethod.to_u64' class='fnname'>to_u64</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.u64.html">u64</a>>;
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fn <a href='#method.to_isize' class='fnname'>to_isize</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.isize.html">isize</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_i8' class='fnname'>to_i8</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.i8.html">i8</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_i16' class='fnname'>to_i16</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.i16.html">i16</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_i32' class='fnname'>to_i32</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.i32.html">i32</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_i128' class='fnname'>to_i128</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.i128.html">i128</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_usize' class='fnname'>to_usize</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.usize.html">usize</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_u8' class='fnname'>to_u8</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.u8.html">u8</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_u16' class='fnname'>to_u16</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.u16.html">u16</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_u32' class='fnname'>to_u32</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>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_u128' class='fnname'>to_u128</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.u128.html">u128</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_f32' class='fnname'>to_f32</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.f32.html">f32</a>> { ... }
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<div class='item-spacer'></div> fn <a href='#method.to_f64' class='fnname'>to_f64</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.f64.html">f64</a>> { ... }
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}</pre></div><div class='docblock'><p>A generic trait for converting a value to a number.</p>
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</div>
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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.to_i64' class='method'><code id='to_i64.v'>fn <a href='#tymethod.to_i64' class='fnname'>to_i64</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.i64.html">i64</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>i64</code>.</p>
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</div><h3 id='tymethod.to_u64' class='method'><code id='to_u64.v'>fn <a href='#tymethod.to_u64' class='fnname'>to_u64</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.u64.html">u64</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>u64</code>.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='provided-methods' class='small-section-header'>Provided methods<a href='#provided-methods' class='anchor'></a></h2><div class='methods'><h3 id='method.to_isize' class='method'><code id='to_isize.v'>fn <a href='#method.to_isize' class='fnname'>to_isize</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.isize.html">isize</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>isize</code>.</p>
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</div><h3 id='method.to_i8' class='method'><code id='to_i8.v'>fn <a href='#method.to_i8' class='fnname'>to_i8</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.i8.html">i8</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>i8</code>.</p>
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</div><h3 id='method.to_i16' class='method'><code id='to_i16.v'>fn <a href='#method.to_i16' class='fnname'>to_i16</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.i16.html">i16</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>i16</code>.</p>
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</div><h3 id='method.to_i32' class='method'><code id='to_i32.v'>fn <a href='#method.to_i32' class='fnname'>to_i32</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.i32.html">i32</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>i32</code>.</p>
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</div><h3 id='method.to_i128' class='method'><code id='to_i128.v'>fn <a href='#method.to_i128' class='fnname'>to_i128</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.i128.html">i128</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>i128</code>.</p>
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<p>This method is only available with feature <code>i128</code> enabled on Rust >= 1.26.</p>
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<p>The default implementation converts through <code>to_i64()</code>. Types implementing
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this trait should override this method if they can represent a greater range.</p>
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</div><h3 id='method.to_usize' class='method'><code id='to_usize.v'>fn <a href='#method.to_usize' class='fnname'>to_usize</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.usize.html">usize</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to a <code>usize</code>.</p>
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</div><h3 id='method.to_u8' class='method'><code id='to_u8.v'>fn <a href='#method.to_u8' class='fnname'>to_u8</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.u8.html">u8</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>u8</code>.</p>
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</div><h3 id='method.to_u16' class='method'><code id='to_u16.v'>fn <a href='#method.to_u16' class='fnname'>to_u16</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.u16.html">u16</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>u16</code>.</p>
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</div><h3 id='method.to_u32' class='method'><code id='to_u32.v'>fn <a href='#method.to_u32' class='fnname'>to_u32</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></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>u32</code>.</p>
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</div><h3 id='method.to_u128' class='method'><code id='to_u128.v'>fn <a href='#method.to_u128' class='fnname'>to_u128</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.u128.html">u128</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>u128</code>.</p>
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<p>This method is only available with feature <code>i128</code> enabled on Rust >= 1.26.</p>
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<p>The default implementation converts through <code>to_u64()</code>. Types implementing
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this trait should override this method if they can represent a greater range.</p>
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</div><h3 id='method.to_f32' class='method'><code id='to_f32.v'>fn <a href='#method.to_f32' class='fnname'>to_f32</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.f32.html">f32</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>f32</code>.</p>
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</div><h3 id='method.to_f64' class='method'><code id='to_f64.v'>fn <a href='#method.to_f64' class='fnname'>to_f64</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.f64.html">f64</a>></code></h3><div class='docblock'><p>Converts the value of <code>self</code> to an <code>f64</code>.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='foreign-impls' class='small-section-header'>Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a></h2><h3 id='impl-ToPrimitive-for-isize' class='impl'><code class='in-band'>impl <a class="trait" href="../../num_traits/cast/trait.ToPrimitive.html" title="trait num_traits::cast::ToPrimitive">ToPrimitive</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code><a href='#impl-ToPrimitive-for-isize' class='anchor'></a><a class='srclink' href='../../src/num_traits/cast.rs.html#141-170' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.to_isize-1' class="method hidden"><code id='to_isize.v-1'>fn <a href='#method.to_isize' class='fnname'>to_isize</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.isize.html">isize</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_i8-1' class="method hidden"><code id='to_i8.v-1'>fn <a href='#method.to_i8' class='fnname'>to_i8</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.i8.html">i8</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_i16-1' class="method hidden"><code id='to_i16.v-1'>fn <a href='#method.to_i16' class='fnname'>to_i16</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.i16.html">i16</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_i32-1' class="method hidden"><code id='to_i32.v-1'>fn <a href='#method.to_i32' class='fnname'>to_i32</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.i32.html">i32</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_i64' class="method hidden"><code id='to_i64.v-1'>fn <a href='#method.to_i64' class='fnname'>to_i64</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.i64.html">i64</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_i128-1' class="method hidden"><code id='to_i128.v-1'>fn <a href='#method.to_i128' class='fnname'>to_i128</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.i128.html">i128</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#112-120' title='goto source code'>[src]</a></h4><h4 id='method.to_usize-1' class="method hidden"><code id='to_usize.v-1'>fn <a href='#method.to_usize' class='fnname'>to_usize</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.usize.html">usize</a>></code><a class='srclink' href='../../src/num_traits/cast.rs.html#128-135' title='goto source code'>[src]</a></h4><h4 id='method.to_u8-1' class="method hi
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<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'></div><span class='loading-content'>Loading content...</span><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
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src="../../implementors/num_traits/cast/trait.ToPrimitive.js">
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