Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 3814 insertions, 0 deletions

diff --git a/src/librustdoc/html/static/css/normalize.css b/src/librustdoc/html/static/css/normalize.css
new file mode 100644
index 000000000..fdb8a8c65
--- /dev/null
+++ b/src/librustdoc/html/static/css/normalize.css
@@ -0,0 +1,2 @@
+/* ignore-tidy-linelength */
+/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */ html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}main{display:block}h1{font-size:2em;margin:0.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace, monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace, monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-0.25em}sup{top:-0.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type="button"],[type="reset"],[type="submit"],button{-webkit-appearance:button}[type="button"]::-moz-focus-inner,[type="reset"]::-moz-focus-inner,[type="submit"]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type="button"]:-moz-focusring,[type="reset"]:-moz-focusring,[type="submit"]:-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:0.35em 0.75em 0.625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type="checkbox"],[type="radio"]{box-sizing:border-box;padding:0}[type="number"]::-webkit-inner-spin-button,[type="number"]::-webkit-outer-spin-button{height:auto}[type="search"]{-webkit-appearance:textfield;outline-offset:-2px}[type="search"]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none}
diff --git a/src/librustdoc/html/static/css/noscript.css b/src/librustdoc/html/static/css/noscript.css
new file mode 100644
index 000000000..0a19a99ab
--- /dev/null
+++ b/src/librustdoc/html/static/css/noscript.css
@@ -0,0 +1,20 @@
+/*
+This whole CSS file is used only in case rustdoc is rendered with javascript disabled. Since a lot
+of content is hidden by default (depending on the settings too), we have to overwrite some of the
+rules.
+*/
+
+#main-content .attributes {
+	/* Since there is no toggle (the "[-]") when JS is disabled, no need for this margin either. */
+	margin-left: 0 !important;
+}
+
+#copy-path {
+	/* It requires JS to work so no need to display it in this case. */
+	display: none;
+}
+
+.sub {
+	/* The search bar and related controls don't work without JS */
+	display: none;
+}
diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
new file mode 100644
index 000000000..83fe14550
--- /dev/null
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -0,0 +1,2335 @@
+/* See FiraSans-LICENSE.txt for the Fira Sans license. */
+@font-face {
+	font-family: 'Fira Sans';
+	font-style: normal;
+	font-weight: 400;
+	src: local('Fira Sans'),
+		url("FiraSans-Regular.woff2") format("woff2");
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Fira Sans';
+	font-style: normal;
+	font-weight: 500;
+	src: local('Fira Sans Medium'),
+		url("FiraSans-Medium.woff2") format("woff2");
+	font-display: swap;
+}
+
+/* See SourceSerif4-LICENSE.md for the Source Serif 4 license. */
+@font-face {
+	font-family: 'Source Serif 4';
+	font-style: normal;
+	font-weight: 400;
+	src: local('Source Serif 4'),
+		url("SourceSerif4-Regular.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Serif 4';
+	font-style: italic;
+	font-weight: 400;
+	src: local('Source Serif 4 Italic'),
+		url("SourceSerif4-It.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Serif 4';
+	font-style: normal;
+	font-weight: 700;
+	src: local('Source Serif 4 Bold'),
+		url("SourceSerif4-Bold.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+
+/* See SourceCodePro-LICENSE.txt for the Source Code Pro license. */
+@font-face {
+	font-family: 'Source Code Pro';
+	font-style: normal;
+	font-weight: 400;
+	/* Avoid using locally installed font because bad versions are in circulation:
+	 * see https://github.com/rust-lang/rust/issues/24355 */
+	src: url("SourceCodePro-Regular.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Code Pro';
+	font-style: italic;
+	font-weight: 400;
+	src: url("SourceCodePro-It.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+@font-face {
+	font-family: 'Source Code Pro';
+	font-style: normal;
+	font-weight: 600;
+	src: url("SourceCodePro-Semibold.ttf.woff2") format("woff2");
+	font-display: swap;
+}
+
+/* Avoid using legacy CJK serif fonts in Windows like Batang. */
+@font-face {
+	font-family: 'NanumBarunGothic';
+	src: url("NanumBarunGothic.ttf.woff2") format("woff2");
+	font-display: swap;
+	unicode-range: U+AC00-D7AF, U+1100-11FF, U+3130-318F, U+A960-A97F, U+D7B0-D7FF;
+}
+
+* {
+	-webkit-box-sizing: border-box;
+	-moz-box-sizing: border-box;
+	box-sizing: border-box;
+}
+
+/* This part handles the "default" theme being used depending on the system one. */
+html {
+	content: "";
+}
+@media (prefers-color-scheme: light) {
+	html {
+		content: "light";
+	}
+}
+@media (prefers-color-scheme: dark) {
+	html {
+		content: "dark";
+	}
+}
+
+/* General structure and fonts */
+
+body {
+	/* Line spacing at least 1.5 per Web Content Accessibility Guidelines
+	   https://www.w3.org/WAI/WCAG21/Understanding/visual-presentation.html */
+	font: 1rem/1.5 "Source Serif 4", NanumBarunGothic, serif;
+	margin: 0;
+	position: relative;
+	/* We use overflow-wrap: break-word for Safari, which doesn't recognize
+	   `anywhere`: https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-wrap */
+	overflow-wrap: break-word;
+	/* Then override it with `anywhere`, which is required to make non-Safari browsers break
+	   more aggressively when we want them to. */
+	overflow-wrap: anywhere;
+
+	-webkit-font-feature-settings: "kern", "liga";
+	-moz-font-feature-settings: "kern", "liga";
+	font-feature-settings: "kern", "liga";
+
+	background-color: var(--main-background-color);
+	color: var(--main-color);
+}
+
+h1 {
+	font-size: 1.5rem; /* 24px */
+}
+h2 {
+	font-size: 1.375rem; /* 22px */
+}
+h3 {
+	font-size: 1.25rem; /* 20px */
+}
+h1, h2, h3, h4, h5, h6 {
+	font-weight: 500;
+}
+h1, h2, h3, h4 {
+	margin: 20px 0 15px 0;
+	padding-bottom: 6px;
+}
+.docblock h3, .docblock h4, h5, h6 {
+	margin: 15px 0 5px 0;
+}
+h1.fqn {
+	margin: 0;
+	padding: 0;
+	border-bottom-color: var(--headings-border-bottom-color);
+}
+h2, h3, h4 {
+	border-bottom-color: var(--headings-border-bottom-color);
+}
+.main-heading {
+	display: flex;
+	flex-wrap: wrap;
+	justify-content: space-between;
+	padding-bottom: 6px;
+	margin-bottom: 15px;
+}
+.main-heading a:hover {
+	text-decoration: underline;
+}
+#toggle-all-docs {
+	text-decoration: none;
+}
+/* The only headings that get underlines are:
+	 Markdown-generated headings within the top-doc
+	 Rustdoc-generated h2 section headings (e.g. "Implementations", "Required Methods", etc)
+	Underlines elsewhere in the documentation break up visual flow and tend to invert
+	section hierarchies. */
+h2,
+.top-doc .docblock > h3,
+.top-doc .docblock > h4 {
+	border-bottom: 1px solid var(--headings-border-bottom-color);
+}
+h3.code-header {
+	font-size: 1.125rem; /* 18px */
+}
+h4.code-header {
+	font-size: 1rem;
+}
+.code-header {
+	font-weight: 600;
+	border-bottom-style: none;
+	margin: 0;
+	padding: 0;
+	margin-top: 0.6em;
+	margin-bottom: 0.4em;
+}
+.impl,
+.impl-items .method,
+.methods .method,
+.impl-items .type,
+.methods .type,
+.impl-items .associatedconstant,
+.methods .associatedconstant,
+.impl-items .associatedtype,
+.methods .associatedtype {
+	flex-basis: 100%;
+	font-weight: 600;
+	position: relative;
+}
+
+div.impl-items > div {
+	padding-left: 0;
+}
+
+h1, h2, h3, h4, h5, h6,
+.sidebar,
+.mobile-topbar,
+a.source,
+.search-input,
+.search-results .result-name,
+.content table td:first-child > a,
+.item-left > a,
+.out-of-band,
+span.since,
+#source-sidebar, #sidebar-toggle,
+details.rustdoc-toggle > summary::before,
+div.impl-items > div:not(.docblock):not(.item-info),
+.content ul.crate a.crate,
+a.srclink,
+#main-content > .since,
+#help-button > button,
+details.rustdoc-toggle.top-doc > summary,
+details.rustdoc-toggle.top-doc > summary::before,
+details.rustdoc-toggle.non-exhaustive > summary,
+details.rustdoc-toggle.non-exhaustive > summary::before,
+.scraped-example-title,
+.more-examples-toggle summary, .more-examples-toggle .hide-more,
+.example-links a,
+/* This selector is for the items listed in the "all items" page. */
+#main-content > ul.docblock > li > a {
+	font-family: "Fira Sans", Arial, NanumBarunGothic, sans-serif;
+}
+
+h1, h2, h3, h4,
+a#toggle-all-docs,
+a.anchor,
+.small-section-header a,
+#source-sidebar a,
+pre.rust a,
+.sidebar h2 a,
+.sidebar h3 a,
+.mobile-topbar h2 a,
+.in-band a,
+.search-results a,
+.module-item .stab,
+.import-item .stab,
+.result-name .primitive > i, .result-name .keyword > i,
+.content .method .where,
+.content .fn .where,
+.content .where.fmt-newline {
+	color: var(--main-color);
+}
+
+ol, ul {
+	padding-left: 24px;
+}
+ul ul, ol ul, ul ol, ol ol {
+	margin-bottom: .625em;
+}
+
+p {
+	/* Paragraph spacing at least 1.5 times line spacing per Web Content Accessibility Guidelines.
+	   Line-height is 1.5rem, so line spacing is .5rem; .75em is 1.5 times that.
+	   https://www.w3.org/WAI/WCAG21/Understanding/visual-presentation.html */
+	margin: 0 0 .75em 0;
+}
+
+summary {
+	outline: none;
+}
+
+/* Fix some style changes due to normalize.css 8 */
+
+td,
+th {
+	padding: 0;
+}
+
+table {
+	border-collapse: collapse;
+}
+
+button,
+input,
+optgroup,
+select,
+textarea {
+	color: inherit;
+	font: inherit;
+	margin: 0;
+}
+
+button {
+	/* Buttons on Safari have different default padding than other platforms. Make them the same. */
+	padding: 1px 6px;
+}
+
+/* end tweaks for normalize.css 8 */
+
+.rustdoc {
+	display: flex;
+	flex-direction: row;
+	flex-wrap: nowrap;
+}
+
+main {
+	position: relative;
+	flex-grow: 1;
+	padding: 10px 15px 40px 45px;
+	min-width: 0;
+}
+
+.source main {
+	padding: 15px;
+}
+
+.width-limiter {
+	max-width: 960px;
+	margin-right: auto;
+}
+
+.source .width-limiter {
+	max-width: unset;
+}
+
+details:not(.rustdoc-toggle) summary {
+	margin-bottom: .6em;
+}
+
+code, pre, a.test-arrow, .code-header {
+	font-family: "Source Code Pro", monospace;
+}
+.docblock code, .docblock-short code {
+	border-radius: 3px;
+	padding: 0 0.125em;
+}
+.docblock pre code, .docblock-short pre code {
+	padding: 0;
+}
+pre {
+	padding: 14px;
+}
+.docblock.item-decl {
+	margin-left: 0;
+}
+.item-decl pre {
+	overflow-x: auto;
+}
+
+.source .content pre {
+	padding: 20px;
+}
+
+img {
+	max-width: 100%;
+}
+
+li {
+	position: relative;
+}
+
+.source .content {
+	max-width: none;
+	overflow: visible;
+	margin-left: 0px;
+}
+
+nav.sub {
+	position: relative;
+	font-size: 1rem;
+}
+
+.sub-container {
+	display: flex;
+	flex-direction: row;
+	flex-wrap: nowrap;
+}
+
+.sub-logo-container {
+	display: none;
+	margin-right: 20px;
+}
+
+.source .sub-logo-container {
+	display: block;
+}
+
+.source .sub-logo-container > img {
+	height: 60px;
+	width: 60px;
+	object-fit: contain;
+}
+
+.sidebar, .mobile-topbar, .sidebar-menu-toggle {
+	background-color: var(--sidebar-background-color);
+}
+
+.sidebar {
+	font-size: 0.875rem;
+	width: 250px;
+	min-width: 200px;
+	overflow-y: scroll;
+	position: sticky;
+	height: 100vh;
+	top: 0;
+	left: 0;
+}
+
+.sidebar-elems,
+.sidebar > .location {
+	padding-left: 24px;
+}
+
+.sidebar .location {
+	overflow-wrap: anywhere;
+}
+
+.rustdoc.source .sidebar {
+	width: 50px;
+	min-width: 0px;
+	max-width: 300px;
+	flex-grow: 0;
+	flex-shrink: 0;
+	flex-basis: auto;
+	border-right: 1px solid;
+	overflow-x: hidden;
+	/* The sidebar is by default hidden  */
+	overflow-y: hidden;
+}
+
+.rustdoc.source .sidebar .sidebar-logo {
+	display: none;
+}
+
+.source .sidebar, #sidebar-toggle, #source-sidebar {
+	background-color: var(--sidebar-background-color);
+}
+
+#sidebar-toggle > button:hover, #sidebar-toggle > button:focus {
+	background-color: var(--sidebar-background-color-hover);
+}
+
+.source .sidebar > *:not(#sidebar-toggle) {
+	opacity: 0;
+	visibility: hidden;
+}
+
+.source-sidebar-expanded .source .sidebar {
+	overflow-y: auto;
+}
+
+.source-sidebar-expanded .source .sidebar > *:not(#sidebar-toggle) {
+	opacity: 1;
+	visibility: visible;
+}
+
+#all-types {
+	margin-top: 1em;
+}
+
+/* Improve the scrollbar display on firefox */
+* {
+	scrollbar-width: initial;
+	scrollbar-color: var(--scrollbar-color);
+}
+.sidebar {
+	scrollbar-width: thin;
+	scrollbar-color: var(--scrollbar-color);
+}
+
+/* Improve the scrollbar display on webkit-based browsers */
+::-webkit-scrollbar {
+	width: 12px;
+}
+.sidebar::-webkit-scrollbar {
+	width: 8px;
+}
+::-webkit-scrollbar-track {
+	-webkit-box-shadow: inset 0;
+	background-color: var(--scrollbar-track-background-color);
+}
+.sidebar::-webkit-scrollbar-track {
+	background-color: var(--scrollbar-track-background-color);
+}
+::-webkit-scrollbar-thumb, .sidebar::-webkit-scrollbar-thumb {
+	background-color: var(--scrollbar-thumb-background-color);
+}
+
+/* Everything else */
+
+.hidden {
+	display: none !important;
+}
+
+.sidebar .logo-container {
+	display: flex;
+	margin-top: 10px;
+	margin-bottom: 10px;
+	justify-content: center;
+}
+
+.version {
+	overflow-wrap: break-word;
+}
+
+.logo-container > img {
+	height: 100px;
+	width: 100px;
+}
+
+.location:empty {
+	border: none;
+}
+
+.location a:first-of-type {
+	font-weight: 500;
+}
+
+.block {
+	padding: 0;
+}
+.block ul, .block li {
+	padding: 0;
+	margin: 0;
+	list-style: none;
+}
+
+.block a,
+h2.location a {
+	display: block;
+	padding: 0.25rem;
+	margin-left: -0.25rem;
+
+	text-overflow: ellipsis;
+	overflow: hidden;
+}
+
+.sidebar h2 {
+	border-bottom: none;
+	font-weight: 500;
+	padding: 0;
+	margin: 0;
+	margin-top: 0.7rem;
+	margin-bottom: 0.7rem;
+}
+
+.sidebar h3 {
+	font-size: 1.125rem; /* 18px */
+	font-weight: 500;
+	padding: 0;
+	margin: 0;
+}
+
+.sidebar-elems .block {
+	margin-bottom: 2em;
+}
+
+.sidebar-elems .block li a {
+	white-space: nowrap;
+}
+
+.mobile-topbar {
+	display: none;
+}
+
+.source .content pre.rust {
+	white-space: pre;
+	overflow: auto;
+	padding-left: 0;
+}
+
+.rustdoc .example-wrap {
+	display: inline-flex;
+	margin-bottom: 10px;
+}
+
+.example-wrap {
+	position: relative;
+	width: 100%;
+}
+
+.example-wrap > pre.line-number {
+	overflow: initial;
+	border: 1px solid;
+	padding: 13px 8px;
+	text-align: right;
+	border-top-left-radius: 5px;
+	border-bottom-left-radius: 5px;
+}
+
+.example-wrap > pre.rust a:hover {
+	text-decoration: underline;
+}
+
+.line-numbers {
+	text-align: right;
+}
+.rustdoc:not(.source) .example-wrap > pre:not(.line-number) {
+	width: 100%;
+	overflow-x: auto;
+}
+
+.rustdoc:not(.source) .example-wrap > pre.line-numbers {
+	width: auto;
+	overflow-x: visible;
+}
+
+.rustdoc .example-wrap > pre {
+	margin: 0;
+}
+
+#search {
+	position: relative;
+}
+
+.search-loading {
+	text-align: center;
+}
+
+#results > table {
+	width: 100%;
+	table-layout: fixed;
+}
+
+.content > .example-wrap pre.line-numbers {
+	position: relative;
+	-webkit-user-select: none;
+	-moz-user-select: none;
+	-ms-user-select: none;
+	user-select: none;
+}
+.line-numbers span {
+	cursor: pointer;
+}
+
+.docblock-short {
+	overflow-wrap: break-word;
+	overflow-wrap: anywhere;
+}
+.docblock-short p {
+	display: inline;
+}
+
+.docblock-short p {
+	overflow: hidden;
+	text-overflow: ellipsis;
+	margin: 0;
+}
+/* Wrap non-pre code blocks (`text`) but not (```text```). */
+.docblock > :not(pre) > code,
+.docblock-short > :not(pre) > code {
+	white-space: pre-wrap;
+}
+
+.top-doc .docblock h2 { font-size: 1.375rem; }
+.top-doc .docblock h3 { font-size: 1.25rem; }
+.top-doc .docblock h4,
+.top-doc .docblock h5 {
+	font-size: 1.125rem;
+}
+.top-doc .docblock h6 {
+	font-size: 1rem;
+}
+
+.docblock h5 { font-size: 1rem; }
+.docblock h6 { font-size: 0.875rem; }
+.docblock h1, .docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 {
+	border-bottom-color: var(--headings-border-bottom-color);
+}
+
+.docblock {
+	margin-left: 24px;
+	position: relative;
+}
+
+.docblock > :not(.information):not(.more-examples-toggle) {
+	max-width: 100%;
+	overflow-x: auto;
+}
+
+.content .out-of-band {
+	flex-grow: 0;
+	font-size: 1.125rem;
+	font-weight: normal;
+	float: right;
+}
+
+.method > .code-header, .trait-impl > .code-header {
+	max-width: calc(100% - 41px);
+	display: block;
+}
+
+.content .in-band {
+	flex-grow: 1;
+	margin: 0px;
+	padding: 0px;
+	overflow-wrap: break-word;
+	overflow-wrap: anywhere;
+}
+
+.in-band > code, .in-band > .code-header {
+	display: inline-block;
+}
+
+.docblock code, .docblock-short code,
+pre, .rustdoc.source .example-wrap {
+	background-color: var(--code-block-background-color);
+}
+
+#main-content {
+	position: relative;
+}
+#main-content > .since {
+	top: inherit;
+}
+
+.content table:not(.table-display) {
+	border-spacing: 0 5px;
+}
+.content td { vertical-align: top; }
+.content td:first-child { padding-right: 20px; }
+.content td p:first-child { margin-top: 0; }
+.content td h1, .content td h2 { margin-left: 0; font-size: 1.125rem; }
+.content tr:first-child td { border-top: 0; }
+
+.docblock table {
+	margin: .5em 0;
+	width: calc(100% - 2px);
+	overflow-x: auto;
+	display: block;
+}
+
+.docblock table td {
+	padding: .5em;
+	border: 1px dashed;
+}
+
+.docblock table th {
+	padding: .5em;
+	text-align: left;
+	border: 1px solid;
+}
+
+.fields + table {
+	margin-bottom: 1em;
+}
+
+.content .item-list {
+	list-style-type: none;
+	padding: 0;
+}
+
+.content .multi-column {
+	-moz-column-count: 5;
+	-moz-column-gap: 2.5em;
+	-webkit-column-count: 5;
+	-webkit-column-gap: 2.5em;
+	column-count: 5;
+	column-gap: 2.5em;
+}
+.content .multi-column li { width: 100%; display: inline-block; }
+
+.content > .methods > .method {
+	font-size: 1rem;
+	position: relative;
+}
+/* Shift "where ..." part of method or fn definition down a line */
+.content .method .where,
+.content .fn .where,
+.content .where.fmt-newline {
+	display: block;
+	font-size: 0.875rem;
+}
+
+.content .methods > div:not(.notable-traits):not(.method) {
+	margin-left: 40px;
+	margin-bottom: 15px;
+}
+
+.content .docblock > .impl-items {
+	margin-left: 20px;
+	margin-top: -34px;
+}
+.content .docblock >.impl-items .table-display {
+	margin: 0;
+}
+.content .docblock >.impl-items table td {
+	padding: 0;
+}
+.content .docblock > .impl-items .table-display, .impl-items table td {
+	border: none;
+}
+
+.item-info {
+	display: block;
+}
+
+.content .item-info code {
+	font-size: 0.875rem;
+}
+
+.content .item-info {
+	position: relative;
+	margin-left: 24px;
+}
+
+.sub-variant > div > .item-info {
+	margin-top: initial;
+}
+
+.content .impl-items .docblock, .content .impl-items .item-info {
+	margin-bottom: .6em;
+}
+
+.content .impl-items > .item-info {
+	margin-left: 40px;
+}
+
+.methods > .item-info, .content .impl-items > .item-info {
+	margin-top: -8px;
+}
+
+.impl-items {
+	flex-basis: 100%;
+}
+
+#main-content > .item-info {
+	margin-top: 0;
+	margin-left: 0;
+}
+
+nav.sub {
+	flex-grow: 1;
+	margin-bottom: 25px;
+}
+.source nav.sub {
+	margin-left: 32px;
+}
+nav.main {
+	padding: 20px 0;
+	text-align: center;
+}
+nav.main .current {
+	border-top: 1px solid;
+	border-bottom: 1px solid;
+}
+nav.main .separator {
+	border: 1px solid;
+	display: inline-block;
+	height: 23px;
+	margin: 0 20px;
+}
+nav.sum { text-align: right; }
+nav.sub form { display: inline; }
+
+a {
+	text-decoration: none;
+	background: transparent;
+}
+
+.small-section-header {
+	display: flex;
+	justify-content: space-between;
+	position: relative;
+}
+
+.small-section-header:hover > .anchor {
+	display: initial;
+}
+
+.in-band:hover > .anchor, .impl:hover > .anchor, .method.trait-impl:hover > .anchor,
+.type.trait-impl:hover > .anchor, .associatedconstant.trait-impl:hover > .anchor,
+.associatedtype.trait-impl:hover > .anchor {
+	display: inline-block;
+	position: absolute;
+}
+.anchor {
+	display: none;
+	position: absolute;
+	left: -0.5em;
+	background: none !important;
+}
+.anchor.field {
+	left: -5px;
+}
+.small-section-header > .anchor {
+	left: -15px;
+	padding-right: 8px;
+}
+h2.small-section-header > .anchor {
+	padding-right: 6px;
+}
+.anchor::before {
+	content: '§';
+}
+
+.docblock a:not(.srclink):not(.test-arrow):not(.scrape-help):hover,
+.docblock-short a:not(.srclink):not(.test-arrow):not(.scrape-help):hover, .item-info a {
+	text-decoration: underline;
+}
+
+.block a.current.crate { font-weight: 500; }
+
+/*  In most contexts we use `overflow-wrap: anywhere` to ensure that we can wrap
+	as much as needed on mobile (see
+	src/test/rustdoc-gui/type-declaration-overflow.goml for an example of why
+	this matters). The `anywhere` value means:
+
+	"Soft wrap opportunities introduced by the word break are considered when
+	 calculating min-content intrinsic sizes."
+
+	https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-wrap#values
+
+	For table layouts, that becomes a problem: the browser tries to make each
+	column as narrow as possible, and `overflow-wrap: anywhere` means it can do
+	so by breaking words - even if some other column could be shrunk without
+	breaking words! This shows up, for instance, in the `Structs` / `Modules` /
+	`Functions` (etcetera) sections of a module page, and when a docblock
+	contains a table.
+
+	So, for table layouts, override the default with break-word, which does
+	_not_ affect min-content intrinsic sizes.
+*/
+table,
+.item-table {
+	overflow-wrap: break-word;
+}
+
+.item-table {
+	display: table;
+}
+.item-row {
+	display: table-row;
+}
+.item-left, .item-right {
+	display: table-cell;
+}
+.item-left {
+	padding-right: 1.25rem;
+}
+
+.search-container {
+	position: relative;
+	display: flex;
+	height: 34px;
+}
+.search-container > * {
+	height: 100%;
+}
+.search-results-title {
+	display: inline;
+}
+#search-settings {
+	font-size: 1.5rem;
+	font-weight: 500;
+	margin-bottom: 20px;
+}
+#crate-search {
+	min-width: 115px;
+	margin-top: 5px;
+	padding-left: 0.15em;
+	padding-right: 23px;
+	border: 1px solid;
+	border-radius: 4px;
+	outline: none;
+	cursor: pointer;
+	-moz-appearance: none;
+	-webkit-appearance: none;
+	/* Removes default arrow from firefox */
+	background-repeat: no-repeat;
+	background-color: transparent;
+	background-size: 20px;
+	background-position: calc(100% - 1px) 56%;
+	background-image: /* AUTOREPLACE: */url("down-arrow.svg");
+	max-width: 100%;
+	text-overflow: ellipsis;
+}
+.search-container {
+	margin-top: 4px;
+}
+.search-input {
+	/* Override Normalize.css: it has a rule that sets
+	   -webkit-appearance: textfield for search inputs. That
+	   causes rounded corners and no border on iOS Safari. */
+	-webkit-appearance: none;
+	/* Override Normalize.css: we have margins and do
+	 not want to overflow - the `moz` attribute is necessary
+	 until Firefox 29, too early to drop at this point */
+	-moz-box-sizing: border-box !important;
+	box-sizing: border-box !important;
+	outline: none;
+	border: 1px solid;
+	border-radius: 2px;
+	padding: 8px;
+	font-size: 1rem;
+	width: 100%;
+}
+
+.search-results {
+	display: none;
+	padding-bottom: 2em;
+}
+
+.search-results.active {
+	display: block;
+	/* prevent overhanging tabs from moving the first result */
+	clear: both;
+}
+
+.search-results .desc > span {
+	white-space: nowrap;
+	text-overflow: ellipsis;
+	overflow: hidden;
+	display: block;
+}
+
+.search-results > a {
+	display: block;
+	width: 100%;
+	/* A little margin ensures the browser's outlining of focused links has room to display. */
+	margin-left: 2px;
+	margin-right: 2px;
+	border-bottom: 1px solid #aaa3;
+}
+
+.search-results > a > div {
+	display: flex;
+	flex-flow: row wrap;
+}
+
+.search-results .result-name, .search-results div.desc, .search-results .result-description {
+	width: 50%;
+}
+.search-results .result-name {
+	padding-right: 1em;
+}
+
+.search-results .result-name > span {
+	display: inline-block;
+	margin: 0;
+	font-weight: normal;
+}
+
+.popover {
+	font-size: 1rem;
+	position: absolute;
+	right: 0;
+	z-index: 2;
+	display: block;
+	margin-top: 7px;
+	border-radius: 3px;
+	border: 1px solid;
+	font-size: 1rem;
+}
+
+/* This rule is to draw the little arrow connecting the settings menu to the gear icon. */
+.popover::before {
+	content: '';
+	position: absolute;
+	right: 11px;
+	border: solid;
+	border-width: 1px 1px 0 0;
+	display: inline-block;
+	padding: 4px;
+	transform: rotate(-45deg);
+	top: -5px;
+}
+
+.popover, .popover::before {
+	background-color: var(--main-background-color);
+	color: var(--main-color);
+}
+
+#help-button .popover {
+	max-width: 600px;
+}
+
+#help-button .popover::before {
+	right: 48px;
+}
+
+#help-button dt {
+	float: left;
+	clear: left;
+	display: block;
+	margin-right: 0.5rem;
+}
+#help-button span.top, #help-button span.bottom {
+	text-align: center;
+	display: block;
+	font-size: 1.125rem;
+}
+#help-button span.top {
+	text-align: center;
+	display: block;
+	margin: 10px 0;
+	border-bottom: 1px solid;
+	padding-bottom: 4px;
+	margin-bottom: 6px;
+}
+#help-button span.bottom {
+	clear: both;
+	border-top: 1px solid;
+}
+.side-by-side {
+	text-align: initial;
+}
+.side-by-side > div {
+	width: 50%;
+	float: left;
+	padding: 0 20px 20px 17px;
+}
+
+.item-info .stab {
+	width: fit-content;
+	/* This min-height is needed to unify the height of the stab elements because some of them
+	   have emojis.
+	*/
+	min-height: 36px;
+	display: flex;
+	align-items: center;
+	white-space: pre-wrap;
+}
+.stab {
+	padding: 3px;
+	margin-bottom: 5px;
+	font-size: 0.875rem;
+	font-weight: normal;
+}
+.stab p {
+	display: inline;
+	margin: 0;
+}
+
+.stab .emoji {
+	font-size: 1.25rem;
+}
+
+/* Black one-pixel outline around emoji shapes */
+.emoji {
+	text-shadow:
+		1px 0 0 black,
+		-1px 0 0 black,
+		0  1px 0 black,
+		0 -1px 0 black;
+}
+
+.module-item .stab,
+.import-item .stab {
+	border-radius: 3px;
+	display: inline-block;
+	font-size: 0.875rem;
+	line-height: 1.2;
+	margin-bottom: 0;
+	margin-left: 0.3125em;
+	padding: 2px;
+	vertical-align: text-bottom;
+}
+
+.module-item.unstable,
+.import-item.unstable {
+	opacity: 0.65;
+}
+
+.since {
+	font-weight: normal;
+	font-size: initial;
+}
+
+.rightside {
+	padding-left: 12px;
+	padding-right: 2px;
+	position: initial;
+}
+
+.impl-items .srclink, .impl .srclink, .methods .srclink {
+	/* Override header settings otherwise it's too bold */
+	font-weight: normal;
+	font-size: 1rem;
+}
+
+.rightside {
+	float: right;
+}
+
+.variants_table {
+	width: 100%;
+}
+
+.variants_table tbody tr td:first-child {
+	width: 1%; /* make the variant name as small as possible */
+}
+
+td.summary-column {
+	width: 100%;
+}
+
+.summary {
+	padding-right: 0px;
+}
+
+pre.rust .question-mark {
+	font-weight: bold;
+}
+
+a.test-arrow {
+	display: inline-block;
+	visibility: hidden;
+	position: absolute;
+	padding: 5px 10px 5px 10px;
+	border-radius: 5px;
+	font-size: 1.375rem;
+	top: 5px;
+	right: 5px;
+	z-index: 1;
+}
+.example-wrap:hover .test-arrow {
+	visibility: visible;
+}
+a.test-arrow:hover{
+	text-decoration: none;
+}
+
+.code-attribute {
+	font-weight: 300;
+}
+
+.item-spacer {
+	width: 100%;
+	height: 12px;
+}
+
+.out-of-band > span.since {
+	position: initial;
+	font-size: 1.25rem;
+}
+
+h3.variant {
+	font-weight: 600;
+	font-size: 1.125rem;
+	margin-bottom: 10px;
+	border-bottom: none;
+}
+
+.sub-variant h4 {
+	font-size: 1rem;
+	font-weight: 400;
+	border-bottom: none;
+	margin-top: 0;
+	margin-bottom: 0;
+}
+
+.sub-variant {
+	margin-left: 24px;
+	margin-bottom: 40px;
+}
+
+.sub-variant > .sub-variant-field {
+	margin-left: 24px;
+}
+
+.toggle-label {
+	display: inline-block;
+	margin-left: 4px;
+	margin-top: 3px;
+}
+
+:target > code, :target > .code-header {
+	opacity: 1;
+}
+
+:target {
+	padding-right: 3px;
+}
+
+.information {
+	position: absolute;
+	left: -25px;
+	margin-top: 7px;
+	z-index: 1;
+}
+
+.tooltip {
+	position: relative;
+	display: inline-block;
+	cursor: pointer;
+}
+
+.tooltip::after {
+	display: none;
+	text-align: center;
+	padding: 5px 3px 3px 3px;
+	border-radius: 6px;
+	margin-left: 5px;
+	font-size: 1rem;
+}
+
+.tooltip.ignore::after {
+	content: "This example is not tested";
+}
+.tooltip.compile_fail::after {
+	content: "This example deliberately fails to compile";
+}
+.tooltip.should_panic::after {
+	content: "This example panics";
+}
+.tooltip.edition::after {
+	content: "This code runs with edition " attr(data-edition);
+}
+
+.tooltip::before {
+	content: " ";
+	position: absolute;
+	top: 50%;
+	left: 16px;
+	margin-top: -5px;
+	border-width: 5px;
+	border-style: solid;
+	display: none;
+}
+
+.tooltip:hover::before, .tooltip:hover::after {
+	display: inline;
+}
+
+.tooltip.compile_fail, .tooltip.should_panic, .tooltip.ignore {
+	font-weight: bold;
+	font-size: 1.25rem;
+}
+
+.notable-traits-tooltip {
+	display: inline-block;
+	cursor: pointer;
+}
+
+.notable-traits:hover .notable-traits-tooltiptext,
+.notable-traits .notable-traits-tooltiptext.force-tooltip {
+	display: inline-block;
+}
+
+.notable-traits .notable-traits-tooltiptext {
+	display: none;
+	padding: 5px 3px 3px 3px;
+	border-radius: 6px;
+	margin-left: 5px;
+	z-index: 10;
+	font-size: 1rem;
+	cursor: default;
+	position: absolute;
+	border: 1px solid;
+}
+
+.notable-traits-tooltip::after {
+	/* The margin on the tooltip does not capture hover events,
+	   this extends the area of hover enough so that mouse hover is not
+	   lost when moving the mouse to the tooltip */
+	content: "\00a0\00a0\00a0";
+}
+
+.notable-traits .notable, .notable-traits .docblock {
+	margin: 0;
+}
+
+.notable-traits .notable {
+	margin: 0;
+	margin-bottom: 13px;
+	font-size: 1.1875rem;
+	font-weight: 600;
+	display: block;
+}
+
+.notable-traits .docblock code.content{
+	margin: 0;
+	padding: 0;
+	font-size: 1.25rem;
+}
+
+/* Example code has the "Run" button that needs to be positioned relative to the pre */
+pre.rust.rust-example-rendered {
+	position: relative;
+}
+
+pre.rust {
+	tab-size: 4;
+	-moz-tab-size: 4;
+}
+
+.search-failed {
+	text-align: center;
+	margin-top: 20px;
+	display: none;
+}
+
+.search-failed.active {
+	display: block;
+}
+
+.search-failed > ul {
+	text-align: left;
+	max-width: 570px;
+	margin-left: auto;
+	margin-right: auto;
+}
+
+#titles {
+	height: 35px;
+}
+
+#titles > button {
+	float: left;
+	width: 33.3%;
+	text-align: center;
+	font-size: 1.125rem;
+	cursor: pointer;
+	border: 0;
+	border-top: 2px solid;
+}
+
+#titles > button:first-child:last-child {
+	margin-right: 1px;
+	width: calc(100% - 1px);
+}
+
+#titles > button:not(:last-child) {
+	margin-right: 1px;
+	width: calc(33.3% - 1px);
+}
+
+#titles > button > div.count {
+	display: inline-block;
+	font-size: 1rem;
+}
+
+.notable-traits {
+	cursor: pointer;
+	z-index: 2;
+	margin-left: 5px;
+}
+
+#sidebar-toggle {
+	position: sticky;
+	top: 0;
+	left: 0;
+	font-weight: bold;
+	font-size: 1.25rem;
+	border-bottom: 1px solid;
+	display: flex;
+	height: 40px;
+	justify-content: center;
+	align-items: center;
+	z-index: 10;
+}
+#source-sidebar {
+	width: 100%;
+	z-index: 1;
+	overflow: auto;
+}
+#source-sidebar > .title {
+	font-size: 1.5rem;
+	text-align: center;
+	border-bottom: 1px solid;
+	margin-bottom: 6px;
+}
+#sidebar-toggle > button {
+	background: none;
+	color: inherit;
+	cursor: pointer;
+	text-align: center;
+	border: none;
+	outline: none;
+	position: absolute;
+	top: 0;
+	bottom: 0;
+	left: 0;
+	right: 0;
+	/* work around button layout strangeness: https://stackoverflow.com/q/7271561 */
+	width: 100%;
+	/* iOS button gradient: https://stackoverflow.com/q/5438567 */
+	-webkit-appearance: none;
+	opacity: 1;
+}
+#settings-menu, #help-button {
+	margin-left: 4px;
+	outline: none;
+}
+
+#copy-path {
+	height: 34px;
+}
+#settings-menu > a, #help-button > button, #copy-path {
+	padding: 5px;
+	width: 33px;
+	border: 1px solid;
+	border-radius: 2px;
+	cursor: pointer;
+}
+#settings-menu {
+	padding: 0;
+}
+#settings-menu > a, #help-button > button {
+	padding: 5px;
+	height: 100%;
+	display: block;
+}
+
+@keyframes rotating {
+	from {
+		transform: rotate(0deg);
+	}
+	to {
+		transform: rotate(360deg);
+	}
+}
+#settings-menu.rotate > a img {
+	animation: rotating 2s linear infinite;
+}
+
+.setting-line .radio-line input:checked {
+	box-shadow: inset 0 0 0 3px var(--main-background-color);
+	background-color: var(--settings-input-color);
+}
+.setting-line .radio-line input:focus {
+	box-shadow: 0 0 1px 1px var(--settings-input-color);
+}
+/* In here we combine both `:focus` and `:checked` properties. */
+.setting-line .radio-line input:checked:focus {
+	box-shadow: inset 0 0 0 3px var(--main-background-color),
+		0 0 2px 2px var(--settings-input-color);
+}
+.setting-line .radio-line input:hover {
+	border-color: var(--settings-input-color) !important;
+}
+input:checked + .slider {
+	background-color: var(--settings-input-color);
+}
+
+#help-button > button {
+	text-align: center;
+	/* Rare exception to specifying font sizes in rem. Since this is acting
+	   as an icon, it's okay to specify their sizes in pixels. */
+	font-size: 20px;
+	padding-top: 2px;
+}
+
+#copy-path {
+	background: initial;
+	margin-left: 10px;
+	padding: 0;
+	padding-left: 2px;
+	border: 0;
+}
+
+#theme-choices {
+	display: none;
+	position: absolute;
+	left: 0;
+	top: 28px;
+	border: 1px solid;
+	border-radius: 3px;
+	z-index: 1;
+	cursor: pointer;
+}
+
+#theme-choices > button {
+	border: none;
+	width: 100%;
+	padding: 4px 8px;
+	text-align: center;
+	background: rgba(0,0,0,0);
+	overflow-wrap: normal;
+}
+
+#theme-choices > button:not(:first-child) {
+	border-top: 1px solid;
+}
+
+kbd {
+	display: inline-block;
+	padding: 3px 5px;
+	font: 15px monospace;
+	line-height: 10px;
+	vertical-align: middle;
+	border: solid 1px;
+	border-radius: 3px;
+	cursor: default;
+}
+
+.hidden-by-impl-hider,
+.hidden-by-usual-hider {
+	/* important because of conflicting rule for small screens */
+	display: none !important;
+}
+
+#implementations-list > h3 > span.in-band {
+	width: 100%;
+}
+
+.table-display {
+	width: 100%;
+	border: 0;
+	border-collapse: collapse;
+	border-spacing: 0;
+	font-size: 1rem;
+}
+
+.table-display tr td:first-child {
+	padding-right: 0;
+}
+
+.table-display tr td:last-child {
+	float: right;
+}
+.table-display .out-of-band {
+	position: relative;
+	font-size: 1.125rem;
+	display: block;
+}
+
+.table-display td:hover .anchor {
+	display: block;
+	top: 2px;
+	left: -5px;
+}
+
+#main-content > ul {
+	padding-left: 10px;
+}
+#main-content > ul > li {
+	list-style: none;
+}
+
+.non-exhaustive {
+	margin-bottom: 1em;
+}
+
+details.dir-entry {
+	padding-left: 4px;
+}
+
+details.dir-entry > summary {
+	margin: 0 0 0 13px;
+	list-style-position: outside;
+	cursor: pointer;
+}
+
+details.dir-entry div.folders, details.dir-entry div.files {
+	padding-left: 23px;
+}
+
+details.dir-entry a {
+	display: block;
+}
+
+/* The hideme class is used on summary tags that contain a span with
+	placeholder text shown only when the toggle is closed. For instance,
+	"Expand description" or "Show methods". */
+details.rustdoc-toggle > summary.hideme {
+	cursor: pointer;
+}
+
+details.rustdoc-toggle > summary {
+	list-style: none;
+}
+details.rustdoc-toggle > summary::-webkit-details-marker,
+details.rustdoc-toggle > summary::marker {
+	display: none;
+}
+
+details.rustdoc-toggle > summary.hideme > span {
+	margin-left: 9px;
+}
+
+details.rustdoc-toggle > summary::before {
+	content: "";
+	cursor: pointer;
+	width: 16px;
+	height: 16px;
+	background-repeat: no-repeat;
+	background-position: top left;
+	display: inline-block;
+	vertical-align: middle;
+	opacity: .5;
+}
+
+/* Screen readers see the text version at the end the line.
+	Visual readers see the icon at the start of the line, but small and transparent. */
+details.rustdoc-toggle > summary::after {
+	content: "Expand";
+	overflow: hidden;
+	width: 0;
+	height: 0;
+	position: absolute;
+}
+
+details.rustdoc-toggle > summary.hideme::after {
+	/* "hideme" toggles already have a description when they're contracted */
+	content: "";
+}
+
+details.rustdoc-toggle > summary:focus::before,
+details.rustdoc-toggle > summary:hover::before {
+	opacity: 1;
+}
+
+details.rustdoc-toggle.top-doc > summary,
+details.rustdoc-toggle.top-doc > summary::before,
+details.rustdoc-toggle.non-exhaustive > summary,
+details.rustdoc-toggle.non-exhaustive > summary::before {
+	font-size: 1rem;
+}
+
+details.non-exhaustive {
+	margin-bottom: 8px;
+}
+
+details.rustdoc-toggle > summary.hideme::before {
+	position: relative;
+}
+
+details.rustdoc-toggle > summary:not(.hideme)::before {
+	position: absolute;
+	left: -24px;
+	top: 4px;
+}
+
+.impl-items > details.rustdoc-toggle > summary:not(.hideme)::before {
+	position: absolute;
+	left: -24px;
+}
+
+/* When a "hideme" summary is open and the "Expand description" or "Show
+	methods" text is hidden, we want the [-] toggle that remains to not
+	affect the layout of the items to its right. To do that, we use
+	absolute positioning. Note that we also set position: relative
+	on the parent <details> to make this work properly. */
+details.rustdoc-toggle[open] > summary.hideme {
+	position: absolute;
+}
+
+details.rustdoc-toggle {
+	position: relative;
+}
+
+details.rustdoc-toggle[open] > summary.hideme > span {
+	display: none;
+}
+
+details.rustdoc-toggle[open] > summary::before,
+details.rustdoc-toggle[open] > summary.hideme::before {
+	background-image: /* AUTOREPLACE: */url("toggle-minus.svg");
+}
+
+details.rustdoc-toggle > summary::before {
+	background-image: /* AUTOREPLACE: */url("toggle-plus.svg");
+}
+
+details.rustdoc-toggle[open] > summary::before,
+details.rustdoc-toggle[open] > summary.hideme::before {
+	width: 16px;
+	height: 16px;
+	background-repeat: no-repeat;
+	background-position: top left;
+	display: inline-block;
+	content: "";
+}
+
+details.rustdoc-toggle[open] > summary::after,
+details.rustdoc-toggle[open] > summary.hideme::after {
+	content: "Collapse";
+}
+
+/* This is needed in docblocks to have the "▶" element to be on the same line. */
+.docblock summary > * {
+	display: inline-block;
+}
+
+/* Media Queries */
+
+/*
+WARNING: RUSTDOC_MOBILE_BREAKPOINT MEDIA QUERY;
+If you update this line, then you also need to update the line with the same warning
+in storage.js plus the media query with (max-width: 700px)
+*/
+@media (min-width: 701px) {
+	/* In case there is no documentation before a code block, we need to add some margin at the top
+	to prevent an overlay between the "collapse toggle" and the information tooltip.
+	However, it's not needed with smaller screen width because the doc/code block is always put
+	"one line" below. */
+	.docblock > .information:first-child > .tooltip {
+		margin-top: 16px;
+	}
+
+	/* When we expand the sidebar on the source code page, we hide the logo on the left of the
+	search bar to have more space. */
+	.source-sidebar-expanded .source .sidebar + main .width-limiter .sub-logo-container.rust-logo {
+		display: none;
+	}
+
+	.source-sidebar-expanded .source .sidebar {
+		width: 300px;
+	}
+}
+
+/*
+WARNING: RUSTDOC_MOBILE_BREAKPOINT MEDIA QUERY
+If you update this line, then you also need to update the line with the same warning
+in storage.js plus the media query with (min-width: 701px)
+*/
+@media (max-width: 700px) {
+	/* When linking to an item with an `id` (for instance, by clicking a link in the sidebar,
+	   or visiting a URL with a fragment like `#method.new`, we don't want the item to be obscured
+	   by the topbar. Anything with an `id` gets scroll-margin-top equal to .mobile-topbar's size.
+	*/
+	*[id] {
+		scroll-margin-top: 45px;
+	}
+
+	.rustdoc {
+		padding-top: 0px;
+		/* Sidebar should overlay main content, rather than pushing main content to the right.
+		   Turn off `display: flex` on the body element. */
+		display: block;
+	}
+
+	main {
+		padding-left: 15px;
+		padding-top: 0px;
+	}
+
+	.rustdoc,
+	.main-heading {
+		flex-direction: column;
+	}
+
+	.content .out-of-band {
+		text-align: left;
+		margin-left: initial;
+		padding: initial;
+	}
+
+	.content .out-of-band .since::before {
+		content: "Since ";
+	}
+
+	#copy-path {
+		display: none;
+	}
+
+	/* Hide the logo and item name from the sidebar. Those are displayed
+	   in the mobile-topbar instead. */
+	.sidebar .sidebar-logo,
+	.sidebar .location {
+		display: none;
+	}
+
+	.sidebar-elems {
+		margin-top: 1em;
+	}
+
+	.sidebar {
+		position: fixed;
+		top: 45px;
+		/* Hide the sidebar offscreen while not in use. Doing this instead of display: none means
+		   the sidebar stays visible for screen readers, which is useful for navigation. */
+		left: -1000px;
+		margin-left: 0;
+		margin: 0;
+		padding: 0;
+		z-index: 11;
+		/* Reduce height slightly to account for mobile topbar. */
+		height: calc(100vh - 45px);
+	}
+
+	/* The source view uses a different design for the sidebar toggle, and doesn't have a topbar,
+	   so don't bump down the main content or the sidebar. */
+	.source main,
+	.rustdoc.source .sidebar {
+		top: 0;
+		padding: 0;
+		height: 100vh;
+		border: 0;
+	}
+
+	.sidebar.shown,
+	.source-sidebar-expanded .source .sidebar,
+	.sidebar:focus-within {
+		left: 0;
+	}
+
+	.rustdoc.source > .sidebar {
+		position: fixed;
+		margin: 0;
+		z-index: 11;
+		width: 0;
+	}
+
+	.mobile-topbar .location a {
+		padding: 0;
+		margin: 0;
+	}
+
+	.mobile-topbar .location {
+		border: none;
+		padding: 0;
+		margin: auto 0.5em auto auto;
+		text-overflow: ellipsis;
+		overflow: hidden;
+		white-space: nowrap;
+		/* Rare exception to specifying font sizes in rem. Since the topbar
+		   height is specified in pixels, this also has to be specified in
+		   pixels to avoid overflowing the topbar when the user sets a bigger
+		   font size. */
+		font-size: 24px;
+	}
+
+	.mobile-topbar .logo-container {
+		max-height: 45px;
+	}
+
+	.mobile-topbar .logo-container > img {
+		max-width: 35px;
+		max-height: 35px;
+		margin-left: 20px;
+		margin-top: 5px;
+		margin-bottom: 5px;
+	}
+
+	.mobile-topbar {
+		display: flex;
+		flex-direction: row;
+		position: sticky;
+		z-index: 10;
+		font-size: 2rem;
+		height: 45px;
+		width: 100%;
+		left: 0;
+		top: 0;
+	}
+
+	.source .mobile-topbar {
+		display: none;
+	}
+
+	.sidebar-menu-toggle {
+		width: 45px;
+		/* Rare exception to specifying font sizes in rem. Since this is acting
+		   as an icon, it's okay to specify its sizes in pixels. */
+		font-size: 32px;
+		border: none;
+	}
+
+	.sidebar-elems {
+		background-color: var(--sidebar-background-color);
+	}
+
+	.source nav:not(.sidebar).sub {
+		margin-left: 32px;
+	}
+
+	.content {
+		margin-left: 0px;
+	}
+
+	.source .content {
+		margin-top: 10px;
+	}
+
+	#search {
+		margin-left: 0;
+		padding: 0;
+	}
+
+	.anchor {
+		display: none !important;
+	}
+
+	.notable-traits {
+		position: absolute;
+		left: -22px;
+		top: 24px;
+	}
+
+	#titles > button > div.count {
+		float: left;
+		width: 100%;
+	}
+
+	#titles {
+		height: 50px;
+	}
+
+	/* Because of ios, we need to actually have a full height sidebar title so the
+	 * actual sidebar can show up. But then we need to make it transparent so we don't
+	 * hide content. The filler just allows to create the background for the sidebar
+	 * title. But because of the absolute position, I had to lower the z-index.
+	 */
+	#sidebar-filler {
+		position: fixed;
+		left: 45px;
+		width: calc(100% - 45px);
+		top: 0;
+		height: 45px;
+		z-index: -1;
+		border-bottom: 1px solid;
+	}
+
+	#main-content > details.rustdoc-toggle > summary::before,
+	#main-content > div > details.rustdoc-toggle > summary::before {
+		left: -11px;
+	}
+
+	#sidebar-toggle {
+		position: fixed;
+		left: 1px;
+		top: 100px;
+		width: 30px;
+		font-size: 1.5rem;
+		text-align: center;
+		padding: 0;
+		z-index: 10;
+		border-top-right-radius: 3px;
+		border-bottom-right-radius: 3px;
+		cursor: pointer;
+		font-weight: bold;
+		border: 1px solid;
+		border-left: 0;
+	}
+
+	.source-sidebar-expanded #sidebar-toggle {
+		left: unset;
+		top: unset;
+		width: unset;
+		border-top-right-radius: unset;
+		border-bottom-right-radius: unset;
+		position: sticky;
+		border: 0;
+		border-bottom: 1px solid;
+	}
+
+	#source-sidebar {
+		z-index: 11;
+	}
+
+	#main-content > .line-numbers {
+		margin-top: 0;
+	}
+
+	.notable-traits .notable-traits-tooltiptext {
+		left: 0;
+		top: 100%;
+	}
+
+	/* We don't display the help button on mobile devices. */
+	#help-button {
+		display: none;
+	}
+
+	/* Display an alternating layout on tablets and phones */
+	.item-table {
+		display: block;
+	}
+	.item-row {
+		display: flex;
+		flex-flow: column wrap;
+	}
+	.item-left, .item-right {
+		width: 100%;
+	}
+
+	/* Display an alternating layout on tablets and phones */
+	.search-results > a {
+		border-bottom: 1px solid #aaa9;
+		padding: 5px 0px;
+	}
+	.search-results .result-name, .search-results div.desc, .search-results .result-description {
+		width: 100%;
+	}
+	.search-results div.desc, .search-results .result-description, .item-right {
+		padding-left: 2em;
+	}
+
+	.source-sidebar-expanded .source .sidebar {
+		max-width: 100vw;
+		width: 100vw;
+	}
+
+	/* Position of the "[-]" element. */
+	details.rustdoc-toggle:not(.top-doc) > summary {
+		margin-left: 10px;
+	}
+	.impl-items > details.rustdoc-toggle > summary:not(.hideme)::before,
+	#main-content > details.rustdoc-toggle:not(.top-doc) > summary::before,
+	#main-content > div > details.rustdoc-toggle > summary::before {
+		left: -11px;
+	}
+}
+
+@media print {
+	nav.sidebar, nav.sub, .content .out-of-band, a.srclink, #copy-path,
+	details.rustdoc-toggle[open] > summary::before, details.rustdoc-toggle > summary::before,
+	details.rustdoc-toggle.top-doc > summary {
+		display: none;
+	}
+
+	.docblock {
+		margin-left: 0;
+	}
+
+	main {
+		padding: 10px;
+	}
+}
+
+@media (max-width: 464px) {
+	#titles, #titles > button {
+		height: 73px;
+	}
+
+	#main-content > table:not(.table-display) td {
+		word-break: break-word;
+		width: 50%;
+	}
+
+	#crate-search {
+		border-radius: 4px;
+	}
+
+	.docblock {
+		margin-left: 12px;
+	}
+
+	.docblock code {
+		overflow-wrap: break-word;
+		overflow-wrap: anywhere;
+	}
+
+	.sub-container {
+		flex-direction: column;
+	}
+
+	.sub-logo-container {
+		align-self: center;
+	}
+
+	.source .sub-logo-container > img {
+		height: 35px;
+		width: 35px;
+	}
+
+	#sidebar-toggle {
+		top: 10px;
+	}
+	.source-sidebar-expanded #sidebar-toggle {
+		top: unset;
+	}
+}
+
+.method-toggle summary,
+.implementors-toggle summary,
+.impl {
+	margin-bottom: 0.75em;
+}
+
+.method-toggle[open] {
+	margin-bottom: 2em;
+}
+
+.implementors-toggle[open]  {
+	margin-bottom: 2em;
+}
+
+#trait-implementations-list .method-toggle,
+#synthetic-implementations-list .method-toggle,
+#blanket-implementations-list .method-toggle {
+	margin-bottom: 1em;
+}
+
+/* Begin: styles for --scrape-examples feature */
+
+.scraped-example-list .scrape-help {
+	margin-left: 10px;
+	padding: 0 4px;
+	font-weight: normal;
+	font-size: 12px;
+	position: relative;
+	bottom: 1px;
+	background: transparent;
+	border-width: 1px;
+	border-style: solid;
+	border-radius: 50px;
+}
+
+.scraped-example .code-wrapper {
+	position: relative;
+	display: flex;
+	flex-direction: row;
+	flex-wrap: wrap;
+	width: 100%;
+}
+
+.scraped-example:not(.expanded) .code-wrapper {
+	max-height: 240px;
+}
+
+.scraped-example:not(.expanded) .code-wrapper pre {
+	overflow-y: hidden;
+	max-height: 240px;
+	padding-bottom: 0;
+}
+
+.scraped-example:not(.expanded) .code-wrapper pre.line-numbers {
+	overflow-x: hidden;
+}
+
+.scraped-example .code-wrapper .prev {
+	position: absolute;
+	top: 0.25em;
+	right: 2.25em;
+	z-index: 100;
+	cursor: pointer;
+}
+
+.scraped-example .code-wrapper .next {
+	position: absolute;
+	top: 0.25em;
+	right: 1.25em;
+	z-index: 100;
+	cursor: pointer;
+}
+
+.scraped-example .code-wrapper .expand {
+	position: absolute;
+	top: 0.25em;
+	right: 0.25em;
+	z-index: 100;
+	cursor: pointer;
+}
+
+.scraped-example:not(.expanded) .code-wrapper:before {
+	content: " ";
+	width: 100%;
+	height: 5px;
+	position: absolute;
+	z-index: 100;
+	top: 0;
+}
+
+.scraped-example:not(.expanded) .code-wrapper:after {
+	content: " ";
+	width: 100%;
+	height: 5px;
+	position: absolute;
+	z-index: 100;
+	bottom: 0;
+}
+
+.scraped-example .code-wrapper .line-numbers {
+	margin: 0;
+	padding: 14px 0;
+}
+
+.scraped-example .code-wrapper .line-numbers span {
+	padding: 0 14px;
+}
+
+.scraped-example .code-wrapper .example-wrap {
+	flex: 1;
+	overflow-x: auto;
+	overflow-y: hidden;
+	margin-bottom: 0;
+}
+
+.scraped-example:not(.expanded) .code-wrapper .example-wrap {
+	overflow-x: hidden;
+}
+
+.scraped-example .code-wrapper .example-wrap pre.rust {
+	overflow-x: inherit;
+	width: inherit;
+	overflow-y: hidden;
+}
+
+
+.more-examples-toggle {
+	max-width: calc(100% + 25px);
+	margin-top: 10px;
+	margin-left: -25px;
+}
+
+.more-examples-toggle .hide-more {
+	margin-left: 25px;
+	margin-bottom: 5px;
+	cursor: pointer;
+}
+
+.more-scraped-examples {
+	margin-left: 5px;
+	display: flex;
+	flex-direction: row;
+}
+
+.more-scraped-examples-inner {
+	/* 20px is width of toggle-line + toggle-line-inner */
+	width: calc(100% - 20px);
+}
+
+.toggle-line {
+	align-self: stretch;
+	margin-right: 10px;
+	margin-top: 5px;
+	padding: 0 4px;
+	cursor: pointer;
+}
+
+.toggle-line-inner {
+	min-width: 2px;
+	height: 100%;
+}
+
+.more-scraped-examples .scraped-example {
+	margin-bottom: 20px;
+}
+
+.more-scraped-examples .scraped-example:last-child {
+	margin-bottom: 0;
+}
+
+.example-links a {
+	margin-top: 20px;
+}
+
+.example-links ul {
+	margin-bottom: 0;
+}
+
+/* End: styles for --scrape-examples feature */
diff --git a/src/librustdoc/html/static/css/settings.css b/src/librustdoc/html/static/css/settings.css
new file mode 100644
index 000000000..e82ec0426
--- /dev/null
+++ b/src/librustdoc/html/static/css/settings.css
@@ -0,0 +1,90 @@
+.setting-line {
+	margin: 0.6em 0 0.6em 0.3em;
+	position: relative;
+}
+
+.setting-line .choices {
+	display: flex;
+	flex-wrap: wrap;
+}
+
+.setting-line .radio-line input {
+	margin-right: 0.3em;
+	height: 1.2rem;
+	width: 1.2rem;
+	border: 1px solid;
+	outline: none;
+	-webkit-appearance: none;
+	cursor: pointer;
+	border-radius: 50%;
+}
+.setting-line .radio-line input + span {
+	padding-bottom: 1px;
+}
+
+.radio-line .setting-name {
+	width: 100%;
+}
+
+.radio-line .choice {
+	margin-top: 0.1em;
+	margin-bottom: 0.1em;
+	min-width: 3.8em;
+	padding: 0.3em;
+	display: flex;
+	align-items: center;
+	cursor: pointer;
+}
+.radio-line .choice + .choice {
+	margin-left: 0.5em;
+}
+
+.toggle {
+	position: relative;
+	width: 100%;
+	margin-right: 20px;
+	display: flex;
+	align-items: center;
+	cursor: pointer;
+}
+
+.toggle input {
+	opacity: 0;
+	position: absolute;
+}
+
+.slider {
+	position: relative;
+	width: 45px;
+	min-width: 45px;
+	display: block;
+	height: 28px;
+	margin-right: 20px;
+	cursor: pointer;
+	background-color: #ccc;
+	transition: .3s;
+}
+
+.slider:before {
+	position: absolute;
+	content: "";
+	height: 19px;
+	width: 19px;
+	left: 4px;
+	bottom: 4px;
+	transition: .3s;
+}
+
+input:checked + .slider:before {
+	transform: translateX(19px);
+}
+
+.setting-line > .sub-settings {
+	padding-left: 42px;
+	width: 100%;
+	display: block;
+}
+
+#settings .setting-line {
+	margin: 1.2em 0.6em;
+}
diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
new file mode 100644
index 000000000..c42cac59b
--- /dev/null
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -0,0 +1,563 @@
+/*
+Based off of the Ayu theme
+Original by Dempfi (https://github.com/dempfi/ayu)
+*/
+
+:root {
+	--main-background-color: #0f1419;
+	--main-color: #c5c5c5;
+	--settings-input-color: #ffb454;
+	--sidebar-background-color: #14191f;
+	--sidebar-background-color-hover: rgba(70, 70, 70, 0.33);
+	--code-block-background-color: #191f26;
+	--scrollbar-track-background-color: transparent;
+	--scrollbar-thumb-background-color: #5c6773;
+	--scrollbar-color: #5c6773 #24292f;
+	--headings-border-bottom-color: #5c6773;
+}
+
+.slider {
+	background-color: #ccc;
+}
+.slider:before {
+	background-color: white;
+}
+input:focus + .slider {
+	box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3);
+}
+
+h1, h2, h3, h4 {
+	color: white;
+}
+h1.fqn  a {
+	color: #fff;
+}
+h4 {
+	border: none;
+}
+
+.in-band {
+	background-color: #0f1419;
+}
+
+.docblock code {
+	color: #ffb454;
+}
+.code-header {
+	color: #e6e1cf;
+}
+.docblock pre > code, pre > code {
+	color: #e6e1cf;
+}
+span code {
+	color: #e6e1cf;
+}
+.docblock a > code {
+	color: #39AFD7 !important;
+}
+pre, .rustdoc.source .example-wrap {
+	color: #e6e1cf;
+}
+
+.rust-logo {
+	filter: drop-shadow(1px 0 0px #fff)
+		drop-shadow(0 1px 0 #fff)
+		drop-shadow(-1px 0 0 #fff)
+		drop-shadow(0 -1px 0 #fff);
+}
+
+.sidebar .current,
+.sidebar a:hover {
+	background-color: transparent;
+	color: #ffb44c;
+}
+
+.sidebar-elems .location {
+	color: #ff7733;
+}
+
+.line-numbers span { color: #5c6773; }
+.line-numbers .line-highlighted {
+	color: #708090;
+	background-color: rgba(255, 236, 164, 0.06);
+	padding-right: 4px;
+	border-right: 1px solid #ffb44c;
+}
+
+.docblock table td, .docblock table th {
+	border-color: #5c6773;
+}
+
+.search-results a:hover {
+	background-color: #777;
+}
+
+.search-results a:focus {
+	color: #000 !important;
+	background-color: #c6afb3;
+}
+.search-results a {
+	color: #0096cf;
+}
+.search-results a div.desc {
+	color: #c5c5c5;
+}
+
+.content .item-info::before { color: #ccc; }
+
+.content span.foreigntype, .content a.foreigntype { color: #ffa0a5; }
+.content span.union, .content a.union { color: #ffa0a5; }
+.content span.constant, .content a.constant,
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+	border-bottom-color: #5c6773;
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+}
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+}
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+}
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+	   It cannot be in the group above because `.search-input` has a different border color on
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+}
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+}
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+	border-style: none !important;
+	border-radius: 4px;
+	padding: 3px 6px 3px 6px;
+}
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+	color: #e6e1cf;
+	background: none;
+}
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+}
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+}
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+}
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+	font-style: italic;
+}
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+}
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+}
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+}
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+	color: #c5c5c5;
+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+	border: 1px solid #5c6773;
+}
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+}
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+	border-color: #5c6773;
+}
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+	border-bottom-color: #5c6773;
+}
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+	background-color: #141920 !important;
+	border-bottom: 1px solid #ffb44c !important;
+	border-top: none;
+}
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+#titles > button:not(.selected) {
+	background-color: transparent !important;
+	border: none;
+}
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+#titles > button:hover {
+	border-bottom: 1px solid rgba(242, 151, 24, 0.3);
+}
+
+#titles > button > div.count {
+	color: #888;
+}
+
+/* rules that this theme does not need to set, here to satisfy the rule checker */
+/* note that a lot of these are partially set in some way (meaning they are set
+individually rather than as a group) */
+/* FIXME: these rules should be at the bottom of the file but currently must be
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+/* see https://github.com/rust-lang/rust/pull/71237#issuecomment-618170143 */
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+}
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+}
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+}
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+	background-color: #0f1419;
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+}
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+}
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+}
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+}
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+	color: #fff;
+	border-bottom-color: #5c6773;
+}
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+}
+#source-sidebar div.files > a.selected {
+	background-color: #14191f;
+	color: #ffb44c;
+}
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+	color: #eee;
+}
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+	color: white;
+}
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+	color: #999;
+}
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+}
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+}
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+	background: linear-gradient(to bottom, rgba(15, 20, 25, 1), rgba(15, 20, 25, 0));
+}
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+}
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+}
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+	background: #c5c5c5;
+}
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
new file mode 100644
index 000000000..a550eb1c1
--- /dev/null
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -0,0 +1,409 @@
+:root {
+	--main-background-color: #353535;
+	--main-color: #ddd;
+	--settings-input-color: #2196f3;
+	--sidebar-background-color: #505050;
+	--sidebar-background-color-hover: #676767;
+	--code-block-background-color: #2A2A2A;
+	--scrollbar-track-background-color: #717171;
+	--scrollbar-thumb-background-color: rgba(32, 34, 37, .6);
+	--scrollbar-color: rgba(32,34,37,.6) #5a5a5a;
+	--headings-border-bottom-color: #d2d2d2;
+}
+
+.slider {
+	background-color: #ccc;
+}
+.slider:before {
+	background-color: white;
+}
+input:focus + .slider {
+	box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3);
+}
+
+.in-band {
+	background-color: #353535;
+}
+
+.rust-logo {
+	filter: drop-shadow(1px 0 0px #fff)
+		drop-shadow(0 1px 0 #fff)
+		drop-shadow(-1px 0 0 #fff)
+		drop-shadow(0 -1px 0 #fff)
+}
+
+.sidebar .current,
+.sidebar a:hover {
+	background: #444;
+}
+
+.line-numbers span { color: #3B91E2; }
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+	background-color: #0a042f !important;
+}
+
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+	border-color: #ddd;
+}
+
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+	background-color: #777;
+}
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+	color: #eee !important;
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+}
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+.sidebar a.current.tymethod { color: #32d479; }
+.sidebar a.current.keyword { color: #fdbf35; }
+
+pre.rust .comment { color: #8d8d8b; }
+pre.rust .doccomment { color: #8ca375; }
+
+nav.main .current {
+	border-top-color: #eee;
+	border-bottom-color: #eee;
+}
+nav.main .separator {
+	border-color: #eee;
+}
+
+a {
+	color: #D2991D;
+}
+
+body.source .example-wrap pre.rust a {
+	background: #333;
+}
+
+details.rustdoc-toggle > summary.hideme > span,
+details.rustdoc-toggle > summary::before {
+	color: #999;
+}
+
+details.rustdoc-toggle > summary::before {
+	filter: invert(100%);
+}
+
+#crate-search, .search-input {
+	color: #111;
+	background-color: #f0f0f0;
+	border-color: #f0f0f0;
+}
+
+#crate-search {
+	/* Without the `!important`, the border-color is ignored for `<select>`...
+	   It cannot be in the group above because `.search-input` has a different border color on
+	   hover. */
+	border-color: #f0f0f0 !important;
+}
+
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+	border-color: #e0e0e0;
+}
+
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+	border-color: #008dfd;
+}
+
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+.stab.portability { background: #F3DFFF; border-color: #b07bdb; color: #2f2f2f; }
+.stab.portability > code { background: none; }
+
+.rightside,
+.out-of-band {
+	color: grey;
+}
+
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+
+/* Code highlighting */
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+pre.rust .kw-2, pre.rust .prelude-ty { color: #769acb; }
+pre.rust .number, pre.rust .string { color: #83a300; }
+pre.rust .self, pre.rust .bool-val, pre.rust .prelude-val,
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+pre.rust .macro, pre.rust .macro-nonterminal { color: #3E999F; }
+pre.rust .lifetime { color: #d97f26; }
+pre.rust .question-mark {
+	color: #ff9011;
+}
+
+.example-wrap > pre.line-number {
+	border-color: #4a4949;
+}
+
+a.test-arrow {
+	color: #dedede;
+	background-color: rgba(78, 139, 202, 0.2);
+}
+
+a.test-arrow:hover{
+	background-color: #4e8bca;
+}
+
+.toggle-label,
+.code-attribute {
+	color: #999;
+}
+
+:target {
+	background-color: #494a3d;
+	border-right: 3px solid #bb7410;
+}
+
+pre.compile_fail {
+	border-left: 2px solid rgba(255,0,0,.8);
+}
+
+pre.compile_fail:hover, .information:hover + pre.compile_fail {
+	border-left: 2px solid #f00;
+}
+
+pre.should_panic {
+	border-left: 2px solid rgba(255,0,0,.8);
+}
+
+pre.should_panic:hover, .information:hover + pre.should_panic {
+	border-left: 2px solid #f00;
+}
+
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+}
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+}
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diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
new file mode 100644
index 000000000..b751acff1
--- /dev/null
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -0,0 +1,395 @@
+:root {
+	--main-background-color: white;
+	--main-color: black;
+	--settings-input-color: #2196f3;
+	--sidebar-background-color: #F5F5F5;
+	--sidebar-background-color-hover: #E0E0E0;
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+}
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+}
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+	background-color: white;
+}
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+	/* This rule exists to force other themes to explicitly style the logo.
+	 * Rustdoc has a custom linter for this purpose.
+	 */
+}
+
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+}
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+	border-color: black;
+	color: black;
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