<!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 matrix reallocator. Changes the size of the memory buffer that initially contains (`RFrom` × `CFrom`) elements to a smaller or larger size (`RTo`, `CTo`)."><meta name="keywords" content="rust, rustlang, rust-lang, Reallocator"><title>Reallocator in nalgebra::base::allocator - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceSerif4-Regular-1f7d512b176f0f72.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/SourceSerif4-Bold-124a1ca42af929b6.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin 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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">☰</button><a class="sidebar-logo" href="../../../nalgebra/index.html"><div class="logo-container"><img class="rust-logo" src="../../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../../nalgebra/index.html"><div class="logo-container"><img class="rust-logo" src="../../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></div></a><h2 class="location"><a href="#">Reallocator</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.reallocate_copy">reallocate_copy</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In nalgebra::base::allocator</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><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" 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="../../../static.files/wheel-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Trait <a href="../../index.html">nalgebra</a>::<wbr><a href="../index.html">base</a>::<wbr><a href="index.html">allocator</a>::<wbr><a class="trait" href="#">Reallocator</a><button id="copy-path" onclick="copy_path(this)" 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="srclink" href="../../../src/nalgebra/base/allocator.rs.html#83-99">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><div class="item-decl"><pre class="rust trait"><code>pub trait Reallocator<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, RFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>, CFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>, RTo: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>, CTo: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>>: <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RFrom, CFrom> + <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RTo, CTo> {
unsafe fn <a href="#tymethod.reallocate_copy" class="fn">reallocate_copy</a>(<br> nrows: RTo,<br> ncols: CTo,<br> buf: <Self as <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RFrom, CFrom>>::<a class="associatedtype" href="trait.Allocator.html#associatedtype.Buffer" title="type nalgebra::base::allocator::Allocator::Buffer">Buffer</a><br> ) -> <Self as <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RTo, CTo>>::<a class="associatedtype" href="trait.Allocator.html#associatedtype.BufferUninit" title="type nalgebra::base::allocator::Allocator::BufferUninit">BufferUninit</a>;
}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A matrix reallocator. Changes the size of the memory buffer that initially contains (<code>RFrom</code> ×
<code>CFrom</code>) elements to a smaller or larger size (<code>RTo</code>, <code>CTo</code>).</p>
</div></details><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="rustdoc-toggle method-toggle" open><summary><section id="tymethod.reallocate_copy" class="method has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/allocator.rs.html#94-98">source</a><h4 class="code-header">unsafe fn <a href="#tymethod.reallocate_copy" class="fn">reallocate_copy</a>(<br> nrows: RTo,<br> ncols: CTo,<br> buf: <Self as <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RFrom, CFrom>>::<a class="associatedtype" href="trait.Allocator.html#associatedtype.Buffer" title="type nalgebra::base::allocator::Allocator::Buffer">Buffer</a><br>) -> <Self as <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RTo, CTo>>::<a class="associatedtype" href="trait.Allocator.html#associatedtype.BufferUninit" title="type nalgebra::base::allocator::Allocator::BufferUninit">BufferUninit</a></h4></section></summary><div class="docblock"><p>Reallocates a buffer of shape <code>(RTo, CTo)</code>, possibly reusing a previously allocated buffer
<code>buf</code>. Data stored by <code>buf</code> are linearly copied to the output:</p>
<h5 id="safety"><a href="#safety">Safety</a></h5>
<p>The following invariants must be respected by the implementors of this method:</p>
<ul>
<li>The copy is performed as if both were just arrays (without taking into account the matrix structure).</li>
<li>If the underlying buffer is being shrunk, the removed elements must <strong>not</strong> be dropped
by this method. Dropping them is the responsibility of the caller.</li>
</ul>
</div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-Reallocator%3CT%2C%20Dyn%2C%20CFrom%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#278-288">source</a><a href="#impl-Reallocator%3CT%2C%20Dyn%2C%20CFrom%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, CFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>, CTo: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, CFrom, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, CTo> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a></h3></section><section id="impl-Reallocator%3CT%2C%20Dyn%2C%20CFrom%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#291-303">source</a><a href="#impl-Reallocator%3CT%2C%20Dyn%2C%20CFrom%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, CFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>, RTo: <a class="trait" href="../dimension/trait.DimName.html" title="trait nalgebra::base::dimension::DimName">DimName</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, CFrom, RTo, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a></h3></section><section id="impl-Reallocator%3CT%2C%20Const%3CRFROM%3E%2C%20Const%3CCFROM%3E%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#216-243">source</a><a href="#impl-Reallocator%3CT%2C%20Const%3CRFROM%3E%2C%20Const%3CCFROM%3E%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, CTo, const RFROM: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>, const CFROM: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><RFROM>, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><CFROM>, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, CTo> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a><span class="where fmt-newline">where<br> CTo: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>,</span></h3></section><section id="impl-Reallocator%3CT%2C%20RFrom%2C%20CFrom%2C%20Const%3CRTO%3E%2C%20Const%3CCTO%3E%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#183-212">source</a><a href="#impl-Reallocator%3CT%2C%20RFrom%2C%20CFrom%2C%20Const%3CRTO%3E%2C%20Const%3CCTO%3E%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, RFrom, CFrom, const RTO: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>, const CTO: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, RFrom, CFrom, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><RTO>, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><CTO>> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a><span class="where fmt-newline">where<br> RFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>,<br> CFrom: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>,<br> Self: <a class="trait" href="trait.Allocator.html" title="trait nalgebra::base::allocator::Allocator">Allocator</a><T, RFrom, CFrom>,</span></h3></section><section id="impl-Reallocator%3CT%2C%20RFrom%2C%20Dyn%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#306-318">source</a><a href="#impl-Reallocator%3CT%2C%20RFrom%2C%20Dyn%2C%20Dyn%2C%20CTo%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, RFrom: <a class="trait" href="../dimension/trait.DimName.html" title="trait nalgebra::base::dimension::DimName">DimName</a>, CTo: <a class="trait" href="../dimension/trait.Dim.html" title="trait nalgebra::base::dimension::Dim">Dim</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, RFrom, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, CTo> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a></h3></section><section id="impl-Reallocator%3CT%2C%20RFrom%2C%20Dyn%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#321-333">source</a><a href="#impl-Reallocator%3CT%2C%20RFrom%2C%20Dyn%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, RFrom: <a class="trait" href="../dimension/trait.DimName.html" title="trait nalgebra::base::dimension::DimName">DimName</a>, RTo: <a class="trait" href="../dimension/trait.DimName.html" title="trait nalgebra::base::dimension::DimName">DimName</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, RFrom, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>, RTo, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a></h3></section><section id="impl-Reallocator%3CT%2C%20Const%3CRFROM%3E%2C%20Const%3CCFROM%3E%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="impl has-srclink"><a class="srclink rightside" href="../../../src/nalgebra/base/default_allocator.rs.html#247-274">source</a><a href="#impl-Reallocator%3CT%2C%20Const%3CRFROM%3E%2C%20Const%3CCFROM%3E%2C%20RTo%2C%20Dyn%3E-for-DefaultAllocator" class="anchor">§</a><h3 class="code-header">impl<T: <a class="trait" href="../trait.Scalar.html" title="trait nalgebra::base::Scalar">Scalar</a>, RTo, const RFROM: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>, const CFROM: <a class="primitive" href="https://doc.rust-lang.org/1.67.1/core/primitive.usize.html">usize</a>> <a class="trait" href="trait.Reallocator.html" title="trait nalgebra::base::allocator::Reallocator">Reallocator</a><T, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><RFROM>, <a class="struct" href="../dimension/struct.Const.html" title="struct nalgebra::base::dimension::Const">Const</a><CFROM>, RTo, <a class="struct" href="../dimension/struct.Dyn.html" title="struct nalgebra::base::dimension::Dyn">Dyn</a>> for <a class="struct" href="../default_allocator/struct.DefaultAllocator.html" title="struct nalgebra::base::default_allocator::DefaultAllocator">DefaultAllocator</a><span class="where fmt-newline">where<br> RTo: <a class="trait" href="../dimension/trait.DimName.html" title="trait nalgebra::base::dimension::DimName">DimName</a>,</span></h3></section></div><script src="../../../implementors/nalgebra/base/allocator/trait.Reallocator.js" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="nalgebra" data-themes="" data-resource-suffix="" data-rustdoc-version="1.67.1 (d5a82bbd2 2023-02-07)" data-search-js="search-444266647c4dba98.js" data-settings-js="settings-bebeae96e00e4617.js" data-settings-css="settings-af96d9e2fc13e081.css" ></div></body></html>