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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="A value which is initialized on the first access."><title>Lazy in once_cell::sync - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-5bc39a1768837dd0.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="once_cell" data-themes="" data-resource-suffix="" data-rustdoc-version="1.77.0 (aedd173a2 2024-03-17)" data-channel="1.77.0" data-search-js="search-dd67cee4cfa65049.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-4c98445ec4002617.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-48f368f3872407c8.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-04d5337699b92874.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../once_cell/index.html">once_cell</a><span class="version">1.19.0</span></h2></div><h2 class="location"><a href="#">Lazy</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.force">force</a></li><li><a href="#method.force_mut">force_mut</a></li><li><a href="#method.get">get</a></li><li><a href="#method.get_mut">get_mut</a></li><li><a href="#method.into_value">into_value</a></li><li><a href="#method.new">new</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Debug-for-Lazy%3CT,+F%3E">Debug</a></li><li><a href="#impl-Default-for-Lazy%3CT%3E">Default</a></li><li><a href="#impl-Deref-for-Lazy%3CT,+F%3E">Deref</a></li><li><a href="#impl-DerefMut-for-Lazy%3CT,+F%3E">DerefMut</a></li><li><a href="#impl-RefUnwindSafe-for-Lazy%3CT,+F%3E">RefUnwindSafe</a></li><li><a href="#impl-Sync-for-Lazy%3CT,+F%3E">Sync</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Send-for-Lazy%3CT,+F%3E">Send</a></li><li><a href="#impl-Unpin-for-Lazy%3CT,+F%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Lazy%3CT,+F%3E">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-T">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-T">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto<U></a></li></ul></section><h2><a href="index.html">In once_cell::sync</a></h2></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../once_cell/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="../index.html">once_cell</a>::<wbr><a href="index.html">sync</a>::<wbr><a class="struct" href="#">Lazy</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/once_cell/lib.rs.html#1255-1258">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub struct Lazy<T, F = <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.fn.html">fn</a>() -> T> { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A value which is initialized on the first access.</p>
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<p>This type is thread-safe and can be used in statics.</p>
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<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::collections::HashMap;
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<span class="kw">use </span>once_cell::sync::Lazy;
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<span class="kw">static </span>HASHMAP: Lazy<HashMap<i32, String>> = Lazy::new(|| {
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<span class="macro">println!</span>(<span class="string">"initializing"</span>);
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<span class="kw">let </span><span class="kw-2">mut </span>m = HashMap::new();
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m.insert(<span class="number">13</span>, <span class="string">"Spica"</span>.to_string());
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m.insert(<span class="number">74</span>, <span class="string">"Hoyten"</span>.to_string());
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m
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});
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<span class="kw">fn </span>main() {
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<span class="macro">println!</span>(<span class="string">"ready"</span>);
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std::thread::spawn(|| {
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<span class="macro">println!</span>(<span class="string">"{:?}"</span>, HASHMAP.get(<span class="kw-2">&</span><span class="number">13</span>));
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}).join().unwrap();
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<span class="macro">println!</span>(<span class="string">"{:?}"</span>, HASHMAP.get(<span class="kw-2">&</span><span class="number">74</span>));
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<span class="comment">// Prints:
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// ready
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// initializing
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// Some("Spica")
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// Some("Hoyten")
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</span>}</code></pre></div>
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</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1275-1292">source</a><a href="#impl-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F> <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1278-1280">source</a><h4 class="code-header">pub const fn <a href="#method.new" class="fn">new</a>(f: F) -> <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h4></section></summary><div class="docblock"><p>Creates a new lazy value with the given initializing
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function.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.into_value" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1285-1291">source</a><h4 class="code-header">pub fn <a href="#method.into_value" class="fn">into_value</a>(this: <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F>) -> <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, F></h4></section></summary><div class="docblock"><p>Consumes this <code>Lazy</code> returning the stored value.</p>
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<p>Returns <code>Ok(value)</code> if <code>Lazy</code> is initialized and <code>Err(f)</code> otherwise.</p>
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</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Lazy%3CT,+F%3E-1" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1294-1371">source</a><a href="#impl-Lazy%3CT,+F%3E-1" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> T> <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.force" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1308-1313">source</a><h4 class="code-header">pub fn <a href="#method.force" class="fn">force</a>(this: &<a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F>) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&T</a></h4></section></summary><div class="docblock"><p>Forces the evaluation of this lazy value and
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returns a reference to the result. This is equivalent
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to the <code>Deref</code> impl, but is explicit.</p>
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<h5 id="example-1"><a class="doc-anchor" href="#example-1">§</a>Example</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>once_cell::sync::Lazy;
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<span class="kw">let </span>lazy = Lazy::new(|| <span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::force(<span class="kw-2">&</span>lazy), <span class="kw-2">&</span><span class="number">92</span>);
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<span class="macro">assert_eq!</span>(<span class="kw-2">&*</span>lazy, <span class="kw-2">&</span><span class="number">92</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.force_mut" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1327-1336">source</a><h4 class="code-header">pub fn <a href="#method.force_mut" class="fn">force_mut</a>(this: &mut <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F>) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class="docblock"><p>Forces the evaluation of this lazy value and
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returns a mutable reference to the result. This is equivalent
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to the <code>Deref</code> impl, but is explicit.</p>
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<h5 id="example-2"><a class="doc-anchor" href="#example-2">§</a>Example</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>once_cell::sync::Lazy;
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<span class="kw">let </span><span class="kw-2">mut </span>lazy = Lazy::new(|| <span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::force_mut(<span class="kw-2">&mut </span>lazy), <span class="kw-2">&mut </span><span class="number">92</span>);</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.get" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1351-1353">source</a><h4 class="code-header">pub fn <a href="#method.get" class="fn">get</a>(this: &<a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F>) -> <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&T</a>></h4></section></summary><div class="docblock"><p>Gets the reference to the result of this lazy value if
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it was initialized, otherwise returns <code>None</code>.</p>
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<h5 id="example-3"><a class="doc-anchor" href="#example-3">§</a>Example</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>once_cell::sync::Lazy;
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<span class="kw">let </span>lazy = Lazy::new(|| <span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::get(<span class="kw-2">&</span>lazy), <span class="prelude-val">None</span>);
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<span class="macro">assert_eq!</span>(<span class="kw-2">&*</span>lazy, <span class="kw-2">&</span><span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::get(<span class="kw-2">&</span>lazy), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">92</span>));</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.get_mut" class="method"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1368-1370">source</a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fn">get_mut</a>(this: &mut <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F>) -> <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&mut T</a>></h4></section></summary><div class="docblock"><p>Gets the reference to the result of this lazy value if
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it was initialized, otherwise returns <code>None</code>.</p>
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<h5 id="example-4"><a class="doc-anchor" href="#example-4">§</a>Example</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>once_cell::sync::Lazy;
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<span class="kw">let </span><span class="kw-2">mut </span>lazy = Lazy::new(|| <span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::get_mut(<span class="kw-2">&mut </span>lazy), <span class="prelude-val">None</span>);
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<span class="macro">assert_eq!</span>(<span class="kw-2">&*</span>lazy, <span class="kw-2">&</span><span class="number">92</span>);
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<span class="macro">assert_eq!</span>(Lazy::get_mut(<span class="kw-2">&mut </span>lazy), <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span><span class="number">92</span>));</code></pre></div>
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</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1260-1264">source</a><a href="#impl-Debug-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>, F> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1261-1263">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.77.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.77.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.77.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-Lazy%3CT%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1386-1391">source</a><a href="#impl-Default-for-Lazy%3CT%3E" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a>> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1388-1390">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -> <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T></h4></section></summary><div class="docblock"><p>Creates a new lazy value using <code>Default</code> as the initializing function.</p>
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</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Deref-for-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1373-1378">source</a><a href="#impl-Deref-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Target" class="associatedtype trait-impl"><a href="#associatedtype.Target" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.77.0/core/ops/deref/trait.Deref.html#associatedtype.Target" class="associatedtype">Target</a> = T</h4></section></summary><div class='docblock'>The resulting type after dereferencing.</div></details><details class="toggle method-toggle" open><summary><section id="method.deref" class="method trait-impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1375-1377">source</a><a href="#method.deref" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/ops/deref/trait.Deref.html#tymethod.deref" class="fn">deref</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Dereferences the value.</div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-DerefMut-for-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1380-1384">source</a><a href="#impl-DerefMut-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.deref_mut" class="method trait-impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1381-1383">source</a><a href="#method.deref_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/ops/deref/trait.DerefMut.html#tymethod.deref_mut" class="fn">deref_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably dereferences the value.</div></details></div></details><section id="impl-RefUnwindSafe-for-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1273">source</a><a href="#impl-RefUnwindSafe-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F><div class="where">where
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<a class="struct" href="struct.OnceCell.html" title="struct once_cell::sync::OnceCell">OnceCell</a><T>: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</div></h3></section><section id="impl-Sync-for-Lazy%3CT,+F%3E" class="impl"><a class="src rightside" href="../../src/once_cell/lib.rs.html#1270">source</a><a href="#impl-Sync-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F><div class="where">where
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<a class="struct" href="struct.OnceCell.html" title="struct once_cell::sync::OnceCell">OnceCell</a><T>: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</div></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Send-for-Lazy%3CT,+F%3E" class="impl"><a href="#impl-Send-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F><div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,
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T: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Unpin-for-Lazy%3CT,+F%3E" class="impl"><a href="#impl-Unpin-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F><div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,
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T: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h3></section><section id="impl-UnwindSafe-for-Lazy%3CT,+F%3E" class="impl"><a href="#impl-UnwindSafe-for-Lazy%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Lazy.html" title="struct once_cell::sync::Lazy">Lazy</a><T, F><div class="where">where
|
||
F: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,
|
||
T: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,</div></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
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||
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.77.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.77.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
|
||
T: ?<a class="trait" href="https://doc.rust-lang.org/1.77.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.77.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.77.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#764">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#767">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
|
||
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#757">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
|
||
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#804-806">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#811">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#789-791">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.77.0/src/core/convert/mod.rs.html#796">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.77.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.77.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html> |