rust
/
rust-course
mirror of https://github.com/sunface/rust-course
5
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'gh-pages'
${ noResults }
rust-course/too-many-lists/production-unsafe-deque/send-sync-and-compile-tests...

439 lines
69 KiB
Raw Permalink Normal View History Unescape

deploy
1 month ago
<!DOCTYPE HTML>
<html lang="zh-CN" class="light" dir="ltr">
<head>
<!-- Book generated using mdBook -->
<meta charset="UTF-8">
<title>Send,Sync和编译测试 - Rust语言圣经(Rust Course)</title>
<!-- Custom HTML head -->
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="theme-color" content="#ffffff">
<link rel="icon" href="../../favicon.svg">
<link rel="shortcut icon" href="../../favicon.png">
<link rel="stylesheet" href="../../css/variables.css">
<link rel="stylesheet" href="../../css/general.css">
<link rel="stylesheet" href="../../css/chrome.css">
<link rel="stylesheet" href="../../css/print.css" media="print">
<!-- Fonts -->
<link rel="stylesheet" href="../../FontAwesome/css/font-awesome.css">
<link rel="stylesheet" href="../../fonts/fonts.css">
<!-- Highlight.js Stylesheets -->
<link rel="stylesheet" href="../../highlight.css">
<link rel="stylesheet" href="../../tomorrow-night.css">
<link rel="stylesheet" href="../../ayu-highlight.css">
<!-- Custom theme stylesheets -->
<link rel="stylesheet" href="../../theme/style.css">
</head>
<body class="sidebar-visible no-js">
<div id="body-container">
<!-- Provide site root to javascript -->
<script>
var path_to_root = "../../";
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light";
</script>
<!-- Work around some values being stored in localStorage wrapped in quotes -->
<script>
try {
var theme = localStorage.getItem('mdbook-theme');
var sidebar = localStorage.getItem('mdbook-sidebar');
if (theme.startsWith('"') && theme.endsWith('"')) {
localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
}
if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
}
} catch (e) { }
</script>
<!-- Set the theme before any content is loaded, prevents flash -->
<script>
var theme;
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
if (theme === null || theme === undefined) { theme = default_theme; }
var html = document.querySelector('html');
html.classList.remove('light')
html.classList.add(theme);
var body = document.querySelector('body');
body.classList.remove('no-js')
body.classList.add('js');
</script>
<input type="checkbox" id="sidebar-toggle-anchor" class="hidden">
<!-- Hide / unhide sidebar before it is displayed -->
<script>
var body = document.querySelector('body');
var sidebar = null;
var sidebar_toggle = document.getElementById("sidebar-toggle-anchor");
if (document.body.clientWidth >= 1080) {
try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
sidebar = sidebar || 'visible';
} else {
sidebar = 'hidden';
}
sidebar_toggle.checked = sidebar === 'visible';
body.classList.remove('sidebar-visible');
body.classList.add("sidebar-" + sidebar);
</script>
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
<div class="sidebar-scrollbox">
<ol class="chapter"><li class="chapter-item affix "><a href="../../about-book.html">关于本书</a></li><li class="chapter-item affix "><a href="../../into-rust.html">进入 Rust 编程世界</a></li><li class="chapter-item affix "><a href="../../first-try/sth-you-should-not-do.html">避免从入门到放弃</a></li><li class="chapter-item affix "><a href="../../community.html">社区和锈书</a></li><li class="spacer"></li><li class="chapter-item affix "><a href="../../some-thoughts.html">Xobserve: 一切皆可观测</a></li><li class="chapter-item affix "><a href="../../beat-ai.html">BeatAI: 工程师 AI 入门圣经</a></li><li class="chapter-item affix "><li class="part-title">Rust 语言基础学习</li><li class="spacer"></li><li class="chapter-item "><a href="../../first-try/intro.html"><strong aria-hidden="true">1.</strong> 寻找牛刀，以便小试</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../first-try/installation.html"><strong aria-hidden="true">1.1.</strong> 安装 Rust 环境</a></li><li class="chapter-item "><a href="../../first-try/editor.html"><strong aria-hidden="true">1.2.</strong> 墙推 VSCode!</a></li><li class="chapter-item "><a href="../../first-try/cargo.html"><strong aria-hidden="true">1.3.</strong> 认识 Cargo</a></li><li class="chapter-item "><a href="../../first-try/hello-world.html"><strong aria-hidden="true">1.4.</strong> 不仅仅是 Hello world</a></li><li class="chapter-item "><a href="../../first-try/slowly-downloading.html"><strong aria-hidden="true">1.5.</strong> 下载依赖太慢了？</a></li></ol></li><li class="chapter-item "><a href="../../basic/intro.html"><strong aria-hidden="true">2.</strong> Rust 基础入门</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/variable.html"><strong aria-hidden="true">2.1.</strong> 变量绑定与解构</a></li><li class="chapter-item "><a href="../../basic/base-type/index.html"><strong aria-hidden="true">2.2.</strong> 基本类型</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/base-type/numbers.html"><strong aria-hidden="true">2.2.1.</strong> 数值类型</a></li><li class="chapter-item "><a href="../../basic/base-type/char-bool.html"><strong aria-hidden="true">2.2.2.</strong> 字符、布尔、单元类型</a></li><li class="chapter-item "><a href="../../basic/base-type/statement-expression.html"><strong aria-hidden="true">2.2.3.</strong> 语句与表达式</a></li><li class="chapter-item "><a href="../../basic/base-type/function.html"><strong aria-hidden="true">2.2.4.</strong> 函数</a></li></ol></li><li class="chapter-item "><a href="../../basic/ownership/index.html"><strong aria-hidden="true">2.3.</strong> 所有权和借用</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/ownership/ownership.html"><strong aria-hidden="true">2.3.1.</strong> 所有权</a></li><li class="chapter-item "><a href="../../basic/ownership/borrowing.html"><strong aria-hidden="true">2.3.2.</strong> 引用与借用</a></li></ol></li><li class="chapter-item "><a href="../../basic/compound-type/intro.html"><strong aria-hidden="true">2.4.</strong> 复合类型</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/compound-type/string-slice.html"><strong aria-hidden="true">2.4.1.</strong> 字符串与切片</a></li><li class="chapter-item "><a href="../../basic/compound-type/tuple.html"><strong aria-hidden="true">2.4.2.</strong> 元组</a></li><li class="chapter-item "><a href="../../basic/compound-type/struct.html"><strong aria-hidden="true">2.4.3.</strong> 结构体</a></li><li class="chapter-item "><a href="../../basic/compound-type/enum.html"><strong aria-hidden="true">2.4.4.</strong> 枚举</a></li><li class="chapter-item "><a href="../../basic/compound-type/array.html"><strong aria-hidden="true">2.4.5.</strong> 数组</a></l
</div>
<div id="sidebar-resize-handle" class="sidebar-resize-handle">
<div class="sidebar-resize-indicator"></div>
</div>
</nav>
<!-- Track and set sidebar scroll position -->
<script>
var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
sidebarScrollbox.addEventListener('click', function(e) {
if (e.target.tagName === 'A') {
sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
}
}, { passive: true });
var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
sessionStorage.removeItem('sidebar-scroll');
if (sidebarScrollTop) {
// preserve sidebar scroll position when navigating via links within sidebar
sidebarScrollbox.scrollTop = sidebarScrollTop;
} else {
// scroll sidebar to current active section when navigating via "next/previous chapter" buttons
var activeSection = document.querySelector('#sidebar .active');
if (activeSection) {
activeSection.scrollIntoView({ block: 'center' });
}
}
</script>
<div id="page-wrapper" class="page-wrapper">
<div class="page">
<div id="menu-bar-hover-placeholder"></div>
<div id="menu-bar" class="menu-bar sticky">
<div class="left-buttons">
<label id="sidebar-toggle" class="icon-button" for="sidebar-toggle-anchor" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
<i class="fa fa-bars"></i>
</label>
<button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
<i class="fa fa-paint-brush"></i>
</button>
<ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
<li role="none"><button role="menuitem" class="theme" id="light">Light</button></li>
<li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
<li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
<li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
<li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
</ul>
<button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
<i class="fa fa-search"></i>
</button>
</div>
<h1 class="menu-title">Rust语言圣经(Rust Course)</h1>
<div class="right-buttons">
<a href="../../print.html" title="Print this book" aria-label="Print this book">
<i id="print-button" class="fa fa-print"></i>
</a>
<a href="https://github.com/sunface/rust-course" title="Git repository" aria-label="Git repository">
<i id="git-repository-button" class="fa fa-github"></i>
</a>
<a href="https://github.com/sunface/rust-course/edit/main/src/too-many-lists/production-unsafe-deque/send-sync-and-compile-tests.md" title="Suggest an edit" aria-label="Suggest an edit">
<i id="git-edit-button" class="fa fa-edit"></i>
</a>
</div>
</div>
<div id="search-wrapper" class="hidden">
<form id="searchbar-outer" class="searchbar-outer">
<input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
</form>
<div id="searchresults-outer" class="searchresults-outer hidden">
<div id="searchresults-header" class="searchresults-header"></div>
<ul id="searchresults">
</ul>
</div>
</div>
<!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
<script>
document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
});
</script>
<div id="content" class="content">
<!-- Page table of contents -->
<div class="sidetoc"><nav class="pagetoc"></nav></div>
<main>
<h1 id="send-sync-and-compile-tests"><a class="header" href="#send-sync-and-compile-tests">Send, Sync, and Compile Tests</a></h1>
<p>好吧，其实我们还有一对特征需要考虑，但它们很特别。我们必须对付 Rust 的神圣罗马帝国： unsafe 的 Opt-in Built-out 特征（OIBITs）： Send 和 Sync，它们实际上是（opt-out）和（built-out）（3 个中有 1 个已经很不错了！）。</p>
<p>与 Copy 一样，这些特征完全没有相关代码，只是标记您的类型具有特定属性。Send 表示你的类型可以安全地发送到另一个线程。Sync 表示你的类型可以在线程间安全共享（&amp;Self: Send）。</p>
<p>关于 LinkedList <em>covariant(协变的)</em> 论点在这里同样适用：一般来说，不使用花哨的内部可变技巧的普通集合可以安全地进行 Send 和 Sync。</p>
<p>But I said they're <em>opt out</em>. So actually, are we already? How would we know?</p>
<p>让我们在代码中添加一些新的魔法：随机的私有垃圾，除非我们的类型具有我们所期望的属性，否则将无法编译：</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>#[allow(dead_code)]
fn assert_properties() {
fn is_send&lt;T: Send&gt;() {}
fn is_sync&lt;T: Sync&gt;() {}
is_send::&lt;LinkedList&lt;i32&gt;&gt;();
is_sync::&lt;LinkedList&lt;i32&gt;&gt;();
is_send::&lt;IntoIter&lt;i32&gt;&gt;();
is_sync::&lt;IntoIter&lt;i32&gt;&gt;();
is_send::&lt;Iter&lt;i32&gt;&gt;();
is_sync::&lt;Iter&lt;i32&gt;&gt;();
is_send::&lt;IterMut&lt;i32&gt;&gt;();
is_sync::&lt;IterMut&lt;i32&gt;&gt;();
is_send::&lt;Cursor&lt;i32&gt;&gt;();
is_sync::&lt;Cursor&lt;i32&gt;&gt;();
fn linked_list_covariant&lt;'a, T&gt;(x: LinkedList&lt;&amp;'static T&gt;) -&gt; LinkedList&lt;&amp;'a T&gt; { x }
fn iter_covariant&lt;'i, 'a, T&gt;(x: Iter&lt;'i, &amp;'static T&gt;) -&gt; Iter&lt;'i, &amp;'a T&gt; { x }
fn into_iter_covariant&lt;'a, T&gt;(x: IntoIter&lt;&amp;'static T&gt;) -&gt; IntoIter&lt;&amp;'a T&gt; { x }
}
cargo build
Compiling linked-list v0.0.3
error[E0277]: `NonNull&lt;Node&lt;i32&gt;&gt;` cannot be sent between threads safely
--&gt; src\lib.rs:433:5
|
433 | is_send::&lt;LinkedList&lt;i32&gt;&gt;();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ `NonNull&lt;Node&lt;i32&gt;&gt;` cannot be sent between threads safely
|
= help: within `LinkedList&lt;i32&gt;`, the trait `Send` is not implemented for `NonNull&lt;Node&lt;i32&gt;&gt;`
= note: required because it appears within the type `Option&lt;NonNull&lt;Node&lt;i32&gt;&gt;&gt;`
note: required because it appears within the type `LinkedList&lt;i32&gt;`
--&gt; src\lib.rs:8:12
|
8 | pub struct LinkedList&lt;T&gt; {
| ^^^^^^^^^^
note: required by a bound in `is_send`
--&gt; src\lib.rs:430:19
|
430 | fn is_send&lt;T: Send&gt;() {}
| ^^^^ required by this bound in `is_send`
&lt;a million more errors&gt;
<span class="boring">}</span></code></pre></pre>
<p>我骗你说原始指针只有一个安全保护：这是另一个。 <code>*const</code> 和 <code>*mut</code> explicitly opt out of Send and Sync to be safe, so we do <em>actually</em> have to opt back in:</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>unsafe impl&lt;T: Send&gt; Send for LinkedList&lt;T&gt; {}
unsafe impl&lt;T: Sync&gt; Sync for LinkedList&lt;T&gt; {}
unsafe impl&lt;'a, T: Send&gt; Send for Iter&lt;'a, T&gt; {}
unsafe impl&lt;'a, T: Sync&gt; Sync for Iter&lt;'a, T&gt; {}
unsafe impl&lt;'a, T: Send&gt; Send for IterMut&lt;'a, T&gt; {}
unsafe impl&lt;'a, T: Sync&gt; Sync for IterMut&lt;'a, T&gt; {}
<span class="boring">}</span></code></pre></pre>
<p>请注意，我们必须在这里编写不安全的 impl：这些是不安全的特征！不安全代码（如并发库）只能依靠我们正确地实现这些特征！由于没有实际代码，我们所做的保证只是：是的，我们在线程间发送或共享确实是安全的！</p>
<p>别以为这些都是随便说说的，我可是经过认证的专业人士，我在这里要说：是的，这些都是完全没问题的。请注意，我们并不需要为 IntoIter 实现 Send 和 Sync：它只是包含 LinkedList，所以会自动生成 Send 和 Sync--我告诉过你它们实际上是 opt out！</p>
<pre><code class="language-text">cargo build
Compiling linked-list v0.0.3
Finished dev [unoptimized + debuginfo] target(s) in 0.18s
</code></pre>
<p>很好</p>
<p>IterMut 绝对不应该是协变的，因为它 &quot;就像&quot; <code>&amp;mut T</code>。</p>
<p>用魔术！其实是用 rustdoc！好吧，我们不一定要使用 rustdoc，但这是最有趣的用法。你看，如果你写了一个 doccomment 并包含了一个代码块，那么 rustdoc 就会尝试编译并运行它，所以我们可以用它来创建新的匿名 &quot;程序&quot;，而这些程序不会影响主程序：</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span> /// ```
/// use linked_list::IterMut;
///
/// fn iter_mut_covariant&lt;'i, 'a, T&gt;(x: IterMut&lt;'i, &amp;'static T&gt;) -&gt; IterMut&lt;'i, &amp;'a T&gt; { x }
/// ```
fn iter_mut_invariant() {}
cargo test
...
Doc-tests linked-list
running 1 test
test src\lib.rs - assert_properties::iter_mut_invariant (line 458) ... FAILED
failures:
---- src\lib.rs - assert_properties::iter_mut_invariant (line 458) stdout ----
error[E0308]: mismatched types
--&gt; src\lib.rs:461:86
|
6 | fn iter_mut_covariant&lt;'i, 'a, T&gt;(x: IterMut&lt;'i, &amp;'static T&gt;) -&gt; IterMut&lt;'i, &amp;'a T&gt; { x }
| ^ lifetime mismatch
|
= note: expected struct `linked_list::IterMut&lt;'_, &amp;'a T&gt;`
found struct `linked_list::IterMut&lt;'_, &amp;'static T&gt;`
<span class="boring">}</span></code></pre></pre>
<p>好吧，我们已经证明了它是不变的，但现在我们的测试失败了。不用担心，rustdoc 会让你在栅栏上注释 compile_fail，说明这是意料之中的！</p>
<p>(实际上，我们只证明了它 &quot;不是<em>covariant(协变的)</em>&quot;，但老实说，如果你能让一个类型 &quot;意外地、错误地<em>contravariant(逆变的)</em> &quot;，那么，恭喜你。）</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span> /// ```compile_fail
/// use linked_list::IterMut;
///
/// fn iter_mut_covariant&lt;'i, 'a, T&gt;(x: IterMut&lt;'i, &amp;'static T&gt;) -&gt; IterMut&lt;'i, &amp;'a T&gt; { x }
/// ```
fn iter_mut_invariant() {}
cargo test
Compiling linked-list v0.0.3
Finished test [unoptimized + debuginfo] target(s) in 0.49s
Running unittests src\lib.rs
...
Doc-tests linked-list
running 1 test
test src\lib.rs - assert_properties::iter_mut_invariant (line 458) - compile fail ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.12s
<span class="boring">}</span></code></pre></pre>
<p>是的！我建议在进行测试时不要使用 compile_fail，这样你可以看到错误是不是和你预期的一致。例如，你忘记了使用 use 关键字，这是错误的，但因为 compile_fail通过了测试。如果不使用compile_fail，测试会因为没有使用 use 失败，这不是我们想要的， 我们想要的是：测试因为 <code>mut</code> 是*covariant(协变的)*的而失败！</p>
<p>(哦，等等，我们其实可以在 compile_fail 旁边指定我们想要的错误代码，但这只适用于 nightly，而且由于上述原因，依赖它是个坏主意。在 not-nightly 版本运行时，它将被默默忽略）。</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span> /// ```compile_fail,E0308
/// use linked_list::IterMut;
///
/// fn iter_mut_covariant&lt;'i, 'a, T&gt;(x: IterMut&lt;'i, &amp;'static T&gt;) -&gt; IterMut&lt;'i, &amp;'a T&gt; { x }
/// ```
fn iter_mut_invariant() {}
<span class="boring">}</span></code></pre></pre>
<p>......还有，你注意到我们实际上把 IterMut 变成*invariant(不变的)*的那部分了吗？这很容易被忽略，因为我 &quot;只是 &quot;复制粘贴了 Iter 并把它放在了最后。这是最后一行：</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>pub struct IterMut&lt;'a, T&gt; {
front: Link&lt;T&gt;,
back: Link&lt;T&gt;,
len: usize,
_boo: PhantomData&lt;&amp;'a mut T&gt;,
}
<span class="boring">}</span></code></pre></pre>
<p>我们试着去掉 PhantomData:</p>
<pre><code class="language-text"> cargo build
Compiling linked-list v0.0.3 (C:\Users\ninte\dev\contain\linked-list)
error[E0392]: parameter `'a` is never used
--&gt; src\lib.rs:30:20
|
30 | pub struct IterMut&lt;'a, T&gt; {
| ^^ unused parameter
|
= help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`
</code></pre>
<p>哈！编译器在背后支持我们，提示我们未使用的 lifetime。让我们试着用一个错误的例子来代替：</p>
<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span> _boo: PhantomData&lt;&amp;'a T&gt;,
cargo build
Compiling linked-list v0.0.3 (C:\Users\ninte\dev\contain\linked-list)
Finished dev [unoptimized + debuginfo] target(s) in 0.17s
<span class="boring">}</span></code></pre></pre>
<p>它可以构建！我们的测试可以发现问题吗？</p>
<pre><code class="language-text">cargo test
...
Doc-tests linked-list
running 1 test
test src\lib.rs - assert_properties::iter_mut_invariant (line 458) - compile fail ... FAILED
failures:
---- src\lib.rs - assert_properties::iter_mut_invariant (line 458) stdout ----
Test compiled successfully, but it's marked `compile_fail`.
failures:
src\lib.rs - assert_properties::iter_mut_invariant (line 458)
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
</code></pre>
<p>Eyyy!!.！这个系统真管用！我喜欢那些能真正完成任务的测试，这样我就不必为那些若隐若现的错误而感到恐惧了！</p>
<div id="giscus-container"></div>
</main>
<nav class="nav-wrapper" aria-label="Page navigation">
<!-- Mobile navigation buttons -->
<a rel="prev" href="../../too-many-lists/production-unsafe-deque/testing.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
<i class="fa fa-angle-left"></i>
</a>
<a rel="next prefetch" href="../../too-many-lists/production-unsafe-deque/implementing-cursors.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
<i class="fa fa-angle-right"></i>
</a>
<div style="clear: both"></div>
</nav>
</div>
</div>
<nav class="nav-wide-wrapper" aria-label="Page navigation">
<a rel="prev" href="../../too-many-lists/production-unsafe-deque/testing.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
<i class="fa fa-angle-left"></i>
</a>
<a rel="next prefetch" href="../../too-many-lists/production-unsafe-deque/implementing-cursors.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
<i class="fa fa-angle-right"></i>
</a>
</nav>
</div>
<script>
window.playground_copyable = true;
</script>
<script src="../../ace.js"></script>
<script src="../../editor.js"></script>
<script src="../../mode-rust.js"></script>
<script src="../../theme-dawn.js"></script>
<script src="../../theme-tomorrow_night.js"></script>
<script src="../../elasticlunr.min.js"></script>
<script src="../../mark.min.js"></script>
<script src="../../searcher.js"></script>
<script src="../../clipboard.min.js"></script>
<script src="../../highlight.js"></script>
<script src="../../book.js"></script>
<script type="text/javascript" charset="utf-8">
var pagePath = "too-many-lists/production-unsafe-deque/send-sync-and-compile-tests.md"
</script>
<!-- Custom JS scripts -->
<script src="../../assets/custom.js"></script>
<script src="../../assets/bigPicture.js"></script>
</div>
</body>
</html>