| <!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="[DynAccess] to [Access] wrapper."><meta name="keywords" content="rust, rustlang, rust-lang, AccessConvert"><title>AccessConvert in arc_swap::access - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" 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href="../../arc_swap/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../arc_swap/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">AccessConvert</a></h2><div class="sidebar-elems"><section><h3><a href="#fields">Tuple Fields</a></h3><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Access%3CT%3E-for-AccessConvert%3CD%3E">Access<T></a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-AccessConvert%3CD%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-AccessConvert%3CD%3E">Send</a></li><li><a href="#impl-Sync-for-AccessConvert%3CD%3E">Sync</a></li><li><a href="#impl-Unpin-for-AccessConvert%3CD%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-AccessConvert%3CD%3E">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-AccessConvert%3CD%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-AccessConvert%3CD%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-AccessConvert%3CD%3E">BorrowMut<T></a></li><li><a href="#impl-DynAccess%3CT%3E-for-AccessConvert%3CD%3E">DynAccess<T></a></li><li><a href="#impl-From%3CT%3E-for-AccessConvert%3CD%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-AccessConvert%3CD%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-AccessConvert%3CD%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-AccessConvert%3CD%3E">TryInto<U></a></li></ul></section><h2><a href="index.html">In arc_swap::access</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Struct <a href="../index.html">arc_swap</a>::<wbr><a href="index.html">access</a>::<wbr><a class="struct" href="#">AccessConvert</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/arc_swap/access.rs.html#280">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct AccessConvert<D>(pub D);</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p><a href="trait.DynAccess.html" title="DynAccess">DynAccess</a> to <a href="trait.Access.html" title="Access">Access</a> wrapper.</p> |
| <p>In previous versions, <code>Box<dyn DynAccess></code> didn’t implement <a href="trait.Access.html" title="Access">Access</a>, to use inside <a href="struct.Map.html" title="Map">Map</a> one |
| could use this wrapper. Since then, a way was found to solve it. In most cases, this wrapper is |
| no longer necessary.</p> |
| <p>This is left in place for two reasons:</p> |
| <ul> |
| <li>Backwards compatibility.</li> |
| <li>Corner-cases not covered by the found solution. For example, trait inheritance in the form of |
| <code>Box<dyn SomeTrait></code> where <code>SomeTrait: Access</code> doesn’t work out of the box and still needs |
| this wrapper.</li> |
| </ul> |
| <h2 id="examples"><a href="#examples">Examples</a></h2> |
| <p>The example is for the simple case (which is no longer needed, but may help as an inspiration).</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::sync::Arc; |
| |
| <span class="kw">use </span>arc_swap::ArcSwap; |
| <span class="kw">use </span>arc_swap::access::{AccessConvert, DynAccess, Map}; |
| |
| <span class="kw">struct </span>Inner { |
| val: usize, |
| } |
| |
| <span class="kw">struct </span>Middle { |
| inner: Inner, |
| } |
| |
| <span class="kw">struct </span>Outer { |
| middle: Middle, |
| } |
| |
| <span class="kw">let </span>outer = Arc::new(ArcSwap::from_pointee(Outer { |
| middle: Middle { |
| inner: Inner { |
| val: <span class="number">42</span>, |
| } |
| } |
| })); |
| |
| <span class="kw">let </span>middle: Arc<<span class="kw">dyn </span>DynAccess<Middle>> = |
| Arc::new(Map::new(outer, |outer: <span class="kw-2">&</span>Outer| <span class="kw-2">&</span>outer.middle)); |
| <span class="kw">let </span>inner: Arc<<span class="kw">dyn </span>DynAccess<Inner>> = |
| Arc::new(Map::new(AccessConvert(middle), |middle: <span class="kw-2">&</span>Middle| <span class="kw-2">&</span>middle.inner)); |
| <span class="kw">let </span>guard = inner.load(); |
| <span class="macro">assert_eq!</span>(<span class="number">42</span>, guard.val);</code></pre></div> |
| </div></details><h2 id="fields" class="fields small-section-header">Tuple Fields<a href="#fields" class="anchor"></a></h2><span id="structfield.0" class="structfield small-section-header"><a href="#structfield.0" class="anchor field"></a><code>0: D</code></span><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Access%3CT%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/arc_swap/access.rs.html#282-292">source</a><a href="#impl-Access%3CT%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T, D> <a class="trait" href="trait.Access.html" title="trait arc_swap::access::Access">Access</a><T> for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: Deref,<br> D::Target: <a class="trait" href="trait.DynAccess.html" title="trait arc_swap::access::DynAccess">DynAccess</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Guard" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Guard" class="anchor"></a><h4 class="code-header">type <a href="trait.Access.html#associatedtype.Guard" class="associatedtype">Guard</a> = DynGuard<T></h4></section></summary><div class='docblock'>A guard object containing the value and keeping it alive. <a href="trait.Access.html#associatedtype.Guard">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.load" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/arc_swap/access.rs.html#289-291">source</a><a href="#method.load" class="anchor"></a><h4 class="code-header">fn <a href="trait.Access.html#tymethod.load" class="fnname">load</a>(&self) -> Self::<a class="associatedtype" href="trait.Access.html#associatedtype.Guard" title="type arc_swap::access::Access::Guard">Guard</a></h4></section></summary><div class='docblock'>The loading method. <a href="trait.Access.html#tymethod.load">Read more</a></div></details></div></details></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"><section id="impl-RefUnwindSafe-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<D> RefUnwindSafe for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: RefUnwindSafe,</span></h3></section><section id="impl-Send-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Send-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<D> Send for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: Send,</span></h3></section><section id="impl-Sync-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Sync-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<D> Sync for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: Sync,</span></h3></section><section id="impl-Unpin-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Unpin-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<D> Unpin for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: Unpin,</span></h3></section><section id="impl-UnwindSafe-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<D> UnwindSafe for <a class="struct" href="struct.AccessConvert.html" title="struct arc_swap::access::AccessConvert">AccessConvert</a><D><span class="where fmt-newline">where<br> D: UnwindSafe,</span></h3></section></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"><summary><section id="impl-Any-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Any-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-DynAccess%3CT%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/arc_swap/access.rs.html#221-229">source</a><a href="#impl-DynAccess%3CT%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T, A> <a class="trait" href="trait.DynAccess.html" title="trait arc_swap::access::DynAccess">DynAccess</a><T> for A<span class="where fmt-newline">where<br> A: <a class="trait" href="trait.Access.html" title="trait arc_swap::access::Access">Access</a><T>,<br> <A as <a class="trait" href="trait.Access.html" title="trait arc_swap::access::Access">Access</a><T>>::<a class="associatedtype" href="trait.Access.html#associatedtype.Guard" title="type arc_swap::access::Access::Guard">Guard</a>: 'static,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.load-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/arc_swap/access.rs.html#226-228">source</a><a href="#method.load-1" class="anchor"></a><h4 class="code-header">fn <a href="trait.DynAccess.html#tymethod.load" class="fnname">load</a>(&self) -> DynGuard<T></h4></section></summary><div class='docblock'>The equivalent of <a href="trait.Access.html#tymethod.load" title="Access::load"><code>Access::load</code></a>.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T> From<T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-AccessConvert%3CD%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-AccessConvert%3CD%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="arc_swap" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |