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<p class='location'>Trait Boxed</p><div class="block items"><ul><li><a href="#associated-types">Associated Types</a></li><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='../index.html'>core</a>::<wbr><a href='index.html'>ops</a></p><script>window.sidebarCurrent = {name: 'Boxed', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>core</a>::<wbr><a href='index.html'>ops</a>::<wbr><a class="trait" href=''>Boxed</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version '></span><span id='render-detail'>
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</span><a class='srclink' href='../../src/core/ops.rs.html#2902-2912' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait Boxed {
type <a href='#associatedtype.Data' class="type">Data</a>;
type <a href='#associatedtype.Place' class="type">Place</a>: <a class="trait" href="../../core/ops/trait.BoxPlace.html" title="trait core::ops::BoxPlace">BoxPlace</a><Self::<a class="trait" href="../../core/ops/trait.Boxed.html" title="trait core::ops::Boxed">Data</a>>;
unsafe fn <a href='#tymethod.finalize' class='fnname'>finalize</a>(filled: Self::<a class="trait" href="../../core/ops/trait.Boxed.html" title="trait core::ops::Boxed">Place</a>) -> Self;
}</pre><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>placement_new_protocol </code><a href="https://github.com/rust-lang/rust/issues/27779">#27779</a>)</div></div><div class='docblock'><p>Core trait for the <code>box EXPR</code> form.</p>
<p><code>box EXPR</code> effectively desugars into:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">place</span> <span class="op">=</span> <span class="ident">BoxPlace</span>::<span class="ident">make_place</span>();
<span class="kw">let</span> <span class="ident">raw_place</span> <span class="op">=</span> <span class="ident">Place</span>::<span class="ident">pointer</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">place</span>);
<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="ident">EXPR</span>;
<span class="kw">unsafe</span> {
::<span class="ident">std</span>::<span class="ident">ptr</span>::<span class="ident">write</span>(<span class="ident">raw_place</span>, <span class="ident">value</span>);
<span class="ident">Boxed</span>::<span class="ident">finalize</span>(<span class="ident">place</span>)
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Alet%20mut%20place%20%3D%20BoxPlace%3A%3Amake_place()%3B%0Alet%20raw_place%20%3D%20Place%3A%3Apointer(%26mut%20place)%3B%0Alet%20value%20%3D%20EXPR%3B%0Aunsafe%20%7B%0A%20%20%20%20%3A%3Astd%3A%3Aptr%3A%3Awrite(raw_place%2C%20value)%3B%0A%20%20%20%20Boxed%3A%3Afinalize(place)%0A%7D%0A%7D">Run</a></pre>
<p>The type of <code>box EXPR</code> is supplied from its surrounding
context; in the above expansion, the result type <code>T</code> is used
to determine which implementation of <code>Boxed</code> to use, and that
<code><T as Boxed></code> in turn dictates determines which
implementation of <code>BoxPlace</code> to use, namely:
<code><<T as Boxed>::Place as BoxPlace></code>.</p>
</div>
<h2 id='associated-types'>Associated Types</h2>
<div class='methods'>
<h3 id='associatedtype.Data' class='method'><span id='Data.t' class='invisible'><code>type <a href='#associatedtype.Data' class="type">Data</a></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>placement_new_protocol </code><a href="https://github.com/rust-lang/rust/issues/27779">#27779</a>)</div></div><div class='docblock'><p>The kind of data that is stored in this kind of box.</p>
</div><h3 id='associatedtype.Place' class='method'><span id='Place.t' class='invisible'><code>type <a href='#associatedtype.Place' class="type">Place</a>: <a class="trait" href="../../core/ops/trait.BoxPlace.html" title="trait core::ops::BoxPlace">BoxPlace</a><Self::<a class="trait" href="../../core/ops/trait.Boxed.html" title="trait core::ops::Boxed">Data</a>></code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>placement_new_protocol </code><a href="https://github.com/rust-lang/rust/issues/27779">#27779</a>)</div></div><div class='docblock'><p>The place that will negotiate the storage of the data.</p>
</div></div>
<h2 id='required-methods'>Required Methods</h2>
<div class='methods'>
<h3 id='tymethod.finalize' class='method'><span id='finalize.v' class='invisible'><code>unsafe fn <a href='#tymethod.finalize' class='fnname'>finalize</a>(filled: Self::<a class="trait" href="../../core/ops/trait.Boxed.html" title="trait core::ops::Boxed">Place</a>) -> Self</code></span></h3><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>placement_new_protocol </code><a href="https://github.com/rust-lang/rust/issues/27779">#27779</a>)</div></div><div class='docblock'><p>Converts filled place into final owning value, shifting
deallocation/cleanup responsibilities (if any remain), over to
returned instance of <code>Self</code> and forgetting <code>filled</code>.</p>
</div></div>
<h2 id='implementors'>Implementors</h2>
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