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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 write-once cell similar to `once_cell::OnceCell`."><meta name="keywords" content="rust, rustlang, rust-lang, GILOnceCell"><title>GILOnceCell in pyo3::once_cell - 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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></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="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../pyo3/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Struct GILOnceCell</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Methods</a><div class="sidebar-links"><a href="#method.get">get</a><a href="#method.get_mut">get_mut</a><a href="#method.get_or_init">get_or_init</a><a href="#method.new">new</a><a href="#method.set">set</a></div><a class="sidebar-title" href="#trait-implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><p class="location"><a href="../index.html">pyo3</a>::<wbr><a href="index.html">once_cell</a></p><div id="sidebar-vars" data-name="GILOnceCell" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Struct <a href="../index.html">pyo3</a>::<wbr><a href="index.html">once_cell</a>::<wbr><a class="struct" href="">GILOnceCell</a><button id="copy-path" onclick="copy_path(this)">⎘</button></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>]</a></span><a class="srclink" href="../../src/pyo3/once_cell.rs.html#32" title="goto source code">[src]</a></span></h1><div class="docblock type-decl"><pre class="rust struct">pub struct GILOnceCell<T>(_);</pre></div><div class="docblock"><p>A write-once cell similar to <a href="https://docs.rs/once_cell/1.4.0/once_cell/"><code>once_cell::OnceCell</code></a>.</p>
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<p>Unlike <code>once_cell::sync</code> which blocks threads to achieve thread safety, this implementation
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uses the Python GIL to mediate concurrent access. This helps in cases where <code>once_sync</code> or
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<code>lazy_static</code>’s synchronization strategy can lead to deadlocks when interacting with the Python
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GIL. For an example, see <a href="https://pyo3.rs/master/faq.html">the FAQ section</a> of the guide.</p>
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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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<p>The following example shows how to use <code>GILOnceCell</code> to share a reference to a Python list
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between threads:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">pyo3::prelude</span>::<span class="kw-2">*</span>;
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<span class="kw">use</span> <span class="ident">pyo3::types::PyList</span>;
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<span class="kw">use</span> <span class="ident">pyo3::once_cell::GILOnceCell</span>;
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<span class="kw">static</span> <span class="ident">LIST_CELL</span>: <span class="ident">GILOnceCell</span><span class="op"><</span><span class="ident">Py</span><span class="op"><</span><span class="ident">PyList</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="ident">GILOnceCell::new</span>();
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_shared_list</span>(<span class="ident">py</span>: <span class="ident">Python</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="ident">PyList</span> {
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<span class="ident">LIST_CELL</span>
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.<span class="ident">get_or_init</span>(<span class="ident">py</span>, <span class="op">|</span><span class="op">|</span> <span class="ident">PyList::empty</span>(<span class="ident">py</span>).<span class="ident">into</span>())
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.<span class="ident">as_ref</span>(<span class="ident">py</span>)
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}</pre></div>
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</div><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl" class="impl"><code class="in-band">impl<T> <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T></code><a href="#impl" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#39-104" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.new" class="method"><code>pub const fn <a href="#method.new" class="fnname">new</a>() -> Self</code><a href="#method.new" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#41-43" title="goto source code">[src]</a></h4><div class="docblock"><p>Create a <code>GILOnceCell</code> which does not yet contain a value.</p>
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</div><h4 id="method.get" class="method"><code>pub fn <a href="#method.get" class="fnname">get</a>(&self, _py: <a class="struct" href="../prelude/struct.Python.html" title="struct pyo3::prelude::Python">Python</a><'_>) -> <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.reference.html">&</a>T></code><a href="#method.get" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#46-49" title="goto source code">[src]</a></h4><div class="docblock"><p>Get a reference to the contained value, or <code>None</code> if the cell has not yet been written.</p>
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</div><h4 id="method.get_or_init" class="method"><code>pub fn <a href="#method.get_or_init" class="fnname">get_or_init</a><F>(&self, py: <a class="struct" href="../prelude/struct.Python.html" title="struct pyo3::prelude::Python">Python</a><'_>, f: F) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> T, </span></code><a href="#method.get_or_init" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#65-81" title="goto source code">[src]</a></h4><div class="docblock"><p>Get a reference to the contained value, initializing it if needed using the provided
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closure.</p>
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<p>Note that:</p>
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<ol>
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<li>reentrant initialization can cause a stack overflow.</li>
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<li>if f() temporarily releases the GIL (e.g. by calling <code>Python::import</code>) then it is
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possible (and well-defined) that a second thread may also call get_or_init and begin
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calling <code>f()</code>. Even when this happens <code>GILOnceCell</code> guarantees that only <strong>one</strong> write
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to the cell ever occurs - other threads will simply discard the value they compute and
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return the result of the first complete computation.</li>
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<li>if f() does not release the GIL and does not panic, it is guaranteed to be called
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exactly once, even if multiple threads attempt to call <code>get_or_init</code></li>
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<li>if f() can panic but still does not release the GIL, it may be called multiple times,
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but it is guaranteed that f() will never be called concurrently</li>
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</ol>
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</div><h4 id="method.get_mut" class="method"><code>pub fn <a href="#method.get_mut" class="fnname">get_mut</a>(&mut 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.reference.html">&mut </a>T></code><a href="#method.get_mut" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#85-88" title="goto source code">[src]</a></h4><div class="docblock"><p>Get the contents of the cell mutably. This is only possible if the reference to the cell is
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unique.</p>
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</div><h4 id="method.set" class="method"><code>pub fn <a href="#method.set" class="fnname">set</a>(&self, _py: <a class="struct" href="../prelude/struct.Python.html" title="struct pyo3::prelude::Python">Python</a><'_>, value: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, T></code><a href="#method.set" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#94-103" title="goto source code">[src]</a></h4><div class="docblock"><p>Set the value in the cell.</p>
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<p>If the cell has already been written, <code>Err(value)</code> will be returned containing the new
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value which was not written.</p>
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</div></div></details><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><h3 id="impl-Send" class="impl"><code class="in-band">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T></code><a href="#impl-Send" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#37" title="goto source code">[src]</a></h3><h3 id="impl-Sync" class="impl"><code class="in-band">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T></code><a href="#impl-Sync" class="anchor"></a><a class="srclink" href="../../src/pyo3/once_cell.rs.html#36" title="goto source code">[src]</a></h3></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><h3 id="impl-RefUnwindSafe" class="impl"><code class="in-band">impl<T> !<a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T></code><a href="#impl-RefUnwindSafe" class="anchor"></a></h3><h3 id="impl-Unpin" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, </span></code><a href="#impl-Unpin" class="anchor"></a></h3><h3 id="impl-UnwindSafe" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.GILOnceCell.html" title="struct pyo3::once_cell::GILOnceCell">GILOnceCell</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a>, </span></code><a href="#impl-UnwindSafe" class="anchor"></a></h3></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-Any" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-Any" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#131-135" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.type_id" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a href="#method.type_id" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#132" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-Borrow%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-Borrow%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#208-213" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.borrow" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</code><a href="#method.borrow" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#210" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-BorrowMut%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#216-220" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.borrow_mut" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</code><a href="#method.borrow_mut" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#217" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-From%3CT%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</code><a href="#impl-From%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#544-548" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.from" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</code><a href="#method.from" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#545" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-Into%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></code><a href="#impl-Into%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#533-540" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="method.into" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</code><a href="#method.into" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#537" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-TryFrom%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></code><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#581-590" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="associatedtype.Error" class="type trait-impl"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code><a href="#associatedtype.Error" class="anchor"></a></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id="method.try_from" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a href="#method.try_from" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#587" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><h3 id="impl-TryInto%3CU%3E" class="impl"><code class="in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></code><a href="#impl-TryInto%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#567-576" title="goto source code">[src]</a></h3></summary><div class="impl-items"><h4 id="associatedtype.Error-1" class="type trait-impl"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="type">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code><a href="#associatedtype.Error-1" class="anchor"></a></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id="method.try_into" class="method hidden trait-impl"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></code><a href="#method.try_into" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#573" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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