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<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `CloneStableDeref` trait in crate `stable_deref_trait`."><metaname="keywords"content="rust, rustlang, rust-lang, CloneStableDeref"><title>stable_deref_trait::CloneStableDeref - Rust</title><linkrel="stylesheet"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../dark.css"><linkrel="stylesheet"type="text/css"href="../light.css"id="themeStyle"><scriptsrc="../storage.js"></script><noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="shortcut icon"href="../favicon.ico"><styletype="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><bodyclass="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><ahref='../stable_deref_trait/index.html'><divclass='logo-container'><imgsrc='../rust-logo.png'alt='logo'></div></a><pclass='location'>Trait CloneStableDeref</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#foreign-impls">Implementations on Foreign Types</a><divclass="sidebar-links"><ahref="#impl-CloneStableDeref-for-%26%27a%20T">&'a T</a><ahref="#impl-CloneStableDeref-for-Arc%3CT%3E">Arc<T></a><ahref="#impl-CloneStableDeref-for-Rc%3CT%3E">Rc<T></a></div><aclass="sidebar-title"href="#implementors">Implementors</a></div><pclass='location'><ahref='index.html'>stable_deref_trait</a></p><script>window.sidebarCurrent={name:'CloneStableDeref',ty:'trait',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><aid="settings-menu"href="../settings.html"><imgsrc="../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../src/stable_deref_trait/lib.rs.html#131'title='goto source code'>[src]</a></span><spanclass='in-band'>Trait <ahref='index.html'>stable_deref_trait</a>::<wbr><aclass="trait"href=''>CloneStableDeref</a></span></h1><divclass="docblock type-decl hidden-by-usual-hider"><preclass='rust trait'>pub unsafe trait CloneStableDeref: <aclass="trait"href="../stable_deref_trait/trait.StableDeref.html"title="trait stable_deref_trait::StableDeref">StableDeref</a> + <aclass="trait"href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a> { }</pre></div><divclass='docblock'><p>An unsafe marker trait for types where clones deref to the same address. This has all the requirements of StableDeref, and additionally requires that after calling clone(), both the old and new value deref to the same address. For example, Rc and Arc implement CloneStableDeref, but Box and Vec do not.</p>
<p>Note that a single type should never implement both DerefMut and CloneStableDeref. If it did, this would let you get two mutable references to the same location, by cloning and then calling deref_mut() on both values.</p>
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<h2id='foreign-impls'class='small-section-header'>Implementations on Foreign Types<ahref='#foreign-impls'class='anchor'></a></h2><h3id='impl-CloneStableDeref-for-Rc%3CT%3E'class='impl'><codeclass='in-band'>impl<T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>><aclass="trait"href="../stable_deref_trait/trait.CloneStableDeref.html"title="trait stable_deref_trait::CloneStableDeref">CloneStableDeref</a> for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html"title="struct alloc::rc::Rc">Rc</a><T></code><ahref='#impl-CloneStableDeref-for-Rc%3CT%3E'class='anchor'></a><aclass='srclink'href='../src/stable_deref_trait/lib.rs.html#182'title='goto source code'>[src]</a></h3><divclass='impl-items'></div><h3id='impl-CloneStableDeref-for-Arc%3CT%3E'class='impl'><codeclass='in-band'>impl<T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>><aclass="trait"href="../stable_deref_trait/trait.CloneStableDeref.html"title="trait stable_deref_trait::CloneStableDeref">CloneStableDeref</a> for <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html"title="struct alloc::sync::Arc">Arc</a><T></code><ahref='#impl-CloneStableDeref-for-Arc%3CT%3E'class='anchor'></a><aclass='srclink'href='../src/stable_deref_trait/lib.rs.html#186'title='goto source code'>[src]</a></h3><divclass='impl-items'></div><h3id='impl-CloneStableDeref-for-%26%27a%20T'class='impl'><codeclass='in-band'>impl<'a, T: ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>><aclass="trait"href="../stable_deref_trait/trait.CloneStableDeref.html"title="trait stable_deref_trait::CloneStableDeref">CloneStableDeref</a> for <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T</code><ahref='#impl-CloneStableDeref-for-%26%27a%20T'class='anchor'></a><aclass='srclink'href='../src/stable_deref_trait/lib.rs.html#200'title='goto source code'>[src]</a></h3><divclass='impl-items'></div><spanclass='loading-content'>Loading content...</span>
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