Extract `Cache` and other types from `html` module

1 files changed, 0 insertions, 4599 deletions

diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
deleted file mode 100644
index fd32ba66d91..00000000000
--- a/src/librustdoc/html/render.rs
+++ /dev/null
@@ -1,4599 +0,0 @@
-// ignore-tidy-filelength
-
-//! Rustdoc's HTML rendering module.
-//!
-//! This modules contains the bulk of the logic necessary for rendering a
-//! rustdoc `clean::Crate` instance to a set of static HTML pages. This
-//! rendering process is largely driven by the `format!` syntax extension to
-//! perform all I/O into files and streams.
-//!
-//! The rendering process is largely driven by the `Context` and `Cache`
-//! structures. The cache is pre-populated by crawling the crate in question,
-//! and then it is shared among the various rendering threads. The cache is meant
-//! to be a fairly large structure not implementing `Clone` (because it's shared
-//! among threads). The context, however, should be a lightweight structure. This
-//! is cloned per-thread and contains information about what is currently being
-//! rendered.
-//!
-//! In order to speed up rendering (mostly because of markdown rendering), the
-//! rendering process has been parallelized. This parallelization is only
-//! exposed through the `crate` method on the context, and then also from the
-//! fact that the shared cache is stored in TLS (and must be accessed as such).
-//!
-//! In addition to rendering the crate itself, this module is also responsible
-//! for creating the corresponding search index and source file renderings.
-//! These threads are not parallelized (they haven't been a bottleneck yet), and
-//! both occur before the crate is rendered.
-
-use std::borrow::Cow;
-use std::cell::{Cell, RefCell};
-use std::cmp::Ordering;
-use std::collections::{BTreeMap, VecDeque};
-use std::default::Default;
-use std::ffi::OsStr;
-use std::fmt::{self, Write};
-use std::fs::{self, File};
-use std::io::prelude::*;
-use std::io::{self, BufReader};
-use std::path::{Component, Path, PathBuf};
-use std::rc::Rc;
-use std::str;
-use std::string::ToString;
-use std::sync::Arc;
-
-use itertools::Itertools;
-use rustc_ast_pretty::pprust;
-use rustc_data_structures::flock;
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_feature::UnstableFeatures;
-use rustc_hir as hir;
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
-use rustc_hir::Mutability;
-use rustc_middle::middle::stability;
-use rustc_span::edition::Edition;
-use rustc_span::hygiene::MacroKind;
-use rustc_span::source_map::FileName;
-use rustc_span::symbol::{sym, Symbol};
-use serde::ser::SerializeSeq;
-use serde::{Serialize, Serializer};
-
-use crate::clean::{self, AttributesExt, Deprecation, GetDefId, SelfTy, TypeKind};
-use crate::config::RenderInfo;
-use crate::config::RenderOptions;
-use crate::docfs::{DocFS, ErrorStorage, PathError};
-use crate::doctree;
-use crate::error::Error;
-use crate::formats::{FormatRenderer, Renderer};
-use crate::html::escape::Escape;
-use crate::html::format::fmt_impl_for_trait_page;
-use crate::html::format::Function;
-use crate::html::format::{href, print_default_space, print_generic_bounds, WhereClause};
-use crate::html::format::{print_abi_with_space, Buffer, PrintWithSpace};
-use crate::html::item_type::ItemType;
-use crate::html::markdown::{self, ErrorCodes, IdMap, Markdown, MarkdownHtml, MarkdownSummaryLine};
-use crate::html::sources;
-use crate::html::{highlight, layout, static_files};
-
-#[cfg(test)]
-mod tests;
-
-mod cache;
-
-use cache::Cache;
-crate use cache::ExternalLocation::{self, *};
-
-/// A pair of name and its optional document.
-pub type NameDoc = (String, Option<String>);
-
-crate fn ensure_trailing_slash(v: &str) -> impl fmt::Display + '_ {
-    crate::html::format::display_fn(move |f| {
-        if !v.ends_with('/') && !v.is_empty() { write!(f, "{}/", v) } else { write!(f, "{}", v) }
-    })
-}
-
-/// Major driving force in all rustdoc rendering. This contains information
-/// about where in the tree-like hierarchy rendering is occurring and controls
-/// how the current page is being rendered.
-///
-/// It is intended that this context is a lightweight object which can be fairly
-/// easily cloned because it is cloned per work-job (about once per item in the
-/// rustdoc tree).
-#[derive(Clone)]
-crate struct Context {
-    /// Current hierarchy of components leading down to what's currently being
-    /// rendered
-    pub current: Vec<String>,
-    /// The current destination folder of where HTML artifacts should be placed.
-    /// This changes as the context descends into the module hierarchy.
-    pub dst: PathBuf,
-    /// A flag, which when `true`, will render pages which redirect to the
-    /// real location of an item. This is used to allow external links to
-    /// publicly reused items to redirect to the right location.
-    pub render_redirect_pages: bool,
-    /// The map used to ensure all generated 'id=' attributes are unique.
-    id_map: Rc<RefCell<IdMap>>,
-    pub shared: Arc<SharedContext>,
-    pub cache: Arc<Cache>,
-    pub parent: Rc<RefCell<Renderer>>,
-    all: Rc<RefCell<AllTypes>>,
-    pub errors: Arc<ErrorStorage>,
-}
-
-crate struct SharedContext {
-    /// The path to the crate root source minus the file name.
-    /// Used for simplifying paths to the highlighted source code files.
-    pub src_root: PathBuf,
-    /// This describes the layout of each page, and is not modified after
-    /// creation of the context (contains info like the favicon and added html).
-    pub layout: layout::Layout,
-    /// This flag indicates whether `[src]` links should be generated or not. If
-    /// the source files are present in the html rendering, then this will be
-    /// `true`.
-    pub include_sources: bool,
-    /// The local file sources we've emitted and their respective url-paths.
-    pub local_sources: FxHashMap<PathBuf, String>,
-    /// Whether the collapsed pass ran
-    pub collapsed: bool,
-    /// The base-URL of the issue tracker for when an item has been tagged with
-    /// an issue number.
-    pub issue_tracker_base_url: Option<String>,
-    /// The directories that have already been created in this doc run. Used to reduce the number
-    /// of spurious `create_dir_all` calls.
-    pub created_dirs: RefCell<FxHashSet<PathBuf>>,
-    /// This flag indicates whether listings of modules (in the side bar and documentation itself)
-    /// should be ordered alphabetically or in order of appearance (in the source code).
-    pub sort_modules_alphabetically: bool,
-    /// Additional CSS files to be added to the generated docs.
-    pub style_files: Vec<StylePath>,
-    /// Suffix to be added on resource files (if suffix is "-v2" then "light.css" becomes
-    /// "light-v2.css").
-    pub resource_suffix: String,
-    /// Optional path string to be used to load static files on output pages. If not set, uses
-    /// combinations of `../` to reach the documentation root.
-    pub static_root_path: Option<String>,
-    /// The fs handle we are working with.
-    pub fs: DocFS,
-    /// The default edition used to parse doctests.
-    pub edition: Edition,
-    pub codes: ErrorCodes,
-    playground: Option<markdown::Playground>,
-}
-
-impl Context {
-    fn path(&self, filename: &str) -> PathBuf {
-        // We use splitn vs Path::extension here because we might get a filename
-        // like `style.min.css` and we want to process that into
-        // `style-suffix.min.css`.  Path::extension would just return `css`
-        // which would result in `style.min-suffix.css` which isn't what we
-        // want.
-        let mut iter = filename.splitn(2, '.');
-        let base = iter.next().unwrap();
-        let ext = iter.next().unwrap();
-        let filename = format!("{}{}.{}", base, self.shared.resource_suffix, ext,);
-        self.dst.join(&filename)
-    }
-}
-
-impl SharedContext {
-    crate fn ensure_dir(&self, dst: &Path) -> Result<(), Error> {
-        let mut dirs = self.created_dirs.borrow_mut();
-        if !dirs.contains(dst) {
-            try_err!(self.fs.create_dir_all(dst), dst);
-            dirs.insert(dst.to_path_buf());
-        }
-
-        Ok(())
-    }
-
-    /// Based on whether the `collapse-docs` pass was run, return either the `doc_value` or the
-    /// `collapsed_doc_value` of the given item.
-    pub fn maybe_collapsed_doc_value<'a>(&self, item: &'a clean::Item) -> Option<Cow<'a, str>> {
-        if self.collapsed {
-            item.collapsed_doc_value().map(|s| s.into())
-        } else {
-            item.doc_value().map(|s| s.into())
-        }
-    }
-}
-
-/// Metadata about implementations for a type or trait.
-#[derive(Clone, Debug)]
-pub struct Impl {
-    pub impl_item: clean::Item,
-}
-
-impl Impl {
-    fn inner_impl(&self) -> &clean::Impl {
-        match self.impl_item.inner {
-            clean::ImplItem(ref impl_) => impl_,
-            _ => panic!("non-impl item found in impl"),
-        }
-    }
-
-    fn trait_did(&self) -> Option<DefId> {
-        self.inner_impl().trait_.def_id()
-    }
-}
-
-// Helper structs for rendering items/sidebars and carrying along contextual
-// information
-
-/// Struct representing one entry in the JS search index. These are all emitted
-/// by hand to a large JS file at the end of cache-creation.
-#[derive(Debug)]
-struct IndexItem {
-    ty: ItemType,
-    name: String,
-    path: String,
-    desc: String,
-    parent: Option<DefId>,
-    parent_idx: Option<usize>,
-    search_type: Option<IndexItemFunctionType>,
-}
-
-impl Serialize for IndexItem {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        assert_eq!(
-            self.parent.is_some(),
-            self.parent_idx.is_some(),
-            "`{}` is missing idx",
-            self.name
-        );
-
-        (self.ty, &self.name, &self.path, &self.desc, self.parent_idx, &self.search_type)
-            .serialize(serializer)
-    }
-}
-
-/// A type used for the search index.
-#[derive(Debug)]
-struct RenderType {
-    ty: Option<DefId>,
-    idx: Option<usize>,
-    name: Option<String>,
-    generics: Option<Vec<Generic>>,
-}
-
-impl Serialize for RenderType {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        if let Some(name) = &self.name {
-            let mut seq = serializer.serialize_seq(None)?;
-            if let Some(id) = self.idx {
-                seq.serialize_element(&id)?;
-            } else {
-                seq.serialize_element(&name)?;
-            }
-            if let Some(generics) = &self.generics {
-                seq.serialize_element(&generics)?;
-            }
-            seq.end()
-        } else {
-            serializer.serialize_none()
-        }
-    }
-}
-
-/// A type used for the search index.
-#[derive(Debug)]
-struct Generic {
-    name: String,
-    defid: Option<DefId>,
-    idx: Option<usize>,
-}
-
-impl Serialize for Generic {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        if let Some(id) = self.idx {
-            serializer.serialize_some(&id)
-        } else {
-            serializer.serialize_some(&self.name)
-        }
-    }
-}
-
-/// Full type of functions/methods in the search index.
-#[derive(Debug)]
-struct IndexItemFunctionType {
-    inputs: Vec<TypeWithKind>,
-    output: Option<Vec<TypeWithKind>>,
-}
-
-impl Serialize for IndexItemFunctionType {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        // If we couldn't figure out a type, just write `null`.
-        let mut iter = self.inputs.iter();
-        if match self.output {
-            Some(ref output) => iter.chain(output.iter()).any(|ref i| i.ty.name.is_none()),
-            None => iter.any(|ref i| i.ty.name.is_none()),
-        } {
-            serializer.serialize_none()
-        } else {
-            let mut seq = serializer.serialize_seq(None)?;
-            seq.serialize_element(&self.inputs)?;
-            if let Some(output) = &self.output {
-                if output.len() > 1 {
-                    seq.serialize_element(&output)?;
-                } else {
-                    seq.serialize_element(&output[0])?;
-                }
-            }
-            seq.end()
-        }
-    }
-}
-
-#[derive(Debug)]
-pub struct TypeWithKind {
-    ty: RenderType,
-    kind: TypeKind,
-}
-
-impl From<(RenderType, TypeKind)> for TypeWithKind {
-    fn from(x: (RenderType, TypeKind)) -> TypeWithKind {
-        TypeWithKind { ty: x.0, kind: x.1 }
-    }
-}
-
-impl Serialize for TypeWithKind {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        let mut seq = serializer.serialize_seq(None)?;
-        seq.serialize_element(&self.ty.name)?;
-        let x: ItemType = self.kind.into();
-        seq.serialize_element(&x)?;
-        seq.end()
-    }
-}
-
-#[derive(Debug, Clone)]
-pub struct StylePath {
-    /// The path to the theme
-    pub path: PathBuf,
-    /// What the `disabled` attribute should be set to in the HTML tag
-    pub disabled: bool,
-}
-
-thread_local!(static CACHE_KEY: RefCell<Arc<Cache>> = Default::default());
-thread_local!(pub static CURRENT_DEPTH: Cell<usize> = Cell::new(0));
-
-pub fn initial_ids() -> Vec<String> {
-    [
-        "main",
-        "search",
-        "help",
-        "TOC",
-        "render-detail",
-        "associated-types",
-        "associated-const",
-        "required-methods",
-        "provided-methods",
-        "implementors",
-        "synthetic-implementors",
-        "implementors-list",
-        "synthetic-implementors-list",
-        "methods",
-        "deref-methods",
-        "implementations",
-    ]
-    .iter()
-    .map(|id| (String::from(*id)))
-    .collect()
-}
-
-impl FormatRenderer for Context {
-    type Output = Self;
-
-    /// Generates the documentation for `crate` into the directory `dst`
-    fn init(
-        mut krate: clean::Crate,
-        options: RenderOptions,
-        renderinfo: RenderInfo,
-        _diag: &rustc_errors::Handler,
-        edition: Edition,
-        parent: Rc<RefCell<Renderer>>,
-    ) -> Result<(Context, clean::Crate), Error> {
-        // need to save a copy of the options for rendering the index page
-        let md_opts = options.clone();
-        let RenderOptions {
-            output,
-            external_html,
-            id_map,
-            playground_url,
-            sort_modules_alphabetically,
-            themes: style_files,
-            extension_css,
-            extern_html_root_urls,
-            resource_suffix,
-            static_root_path,
-            generate_search_filter,
-            document_private,
-            ..
-        } = options;
-
-        let src_root = match krate.src {
-            FileName::Real(ref p) => match p.local_path().parent() {
-                Some(p) => p.to_path_buf(),
-                None => PathBuf::new(),
-            },
-            _ => PathBuf::new(),
-        };
-        let errors = Arc::new(ErrorStorage::new());
-        // If user passed in `--playground-url` arg, we fill in crate name here
-        let mut playground = None;
-        if let Some(url) = playground_url {
-            playground = Some(markdown::Playground { crate_name: Some(krate.name.clone()), url });
-        }
-        let mut layout = layout::Layout {
-            logo: String::new(),
-            favicon: String::new(),
-            external_html,
-            krate: krate.name.clone(),
-            css_file_extension: extension_css,
-            generate_search_filter,
-        };
-        let mut issue_tracker_base_url = None;
-        let mut include_sources = true;
-
-        // Crawl the crate attributes looking for attributes which control how we're
-        // going to emit HTML
-        if let Some(attrs) = krate.module.as_ref().map(|m| &m.attrs) {
-            for attr in attrs.lists(sym::doc) {
-                match (attr.name_or_empty(), attr.value_str()) {
-                    (sym::html_favicon_url, Some(s)) => {
-                        layout.favicon = s.to_string();
-                    }
-                    (sym::html_logo_url, Some(s)) => {
-                        layout.logo = s.to_string();
-                    }
-                    (sym::html_playground_url, Some(s)) => {
-                        playground = Some(markdown::Playground {
-                            crate_name: Some(krate.name.clone()),
-                            url: s.to_string(),
-                        });
-                    }
-                    (sym::issue_tracker_base_url, Some(s)) => {
-                        issue_tracker_base_url = Some(s.to_string());
-                    }
-                    (sym::html_no_source, None) if attr.is_word() => {
-                        include_sources = false;
-                    }
-                    _ => {}
-                }
-            }
-        }
-        let mut scx = SharedContext {
-            collapsed: krate.collapsed,
-            src_root,
-            include_sources,
-            local_sources: Default::default(),
-            issue_tracker_base_url,
-            layout,
-            created_dirs: Default::default(),
-            sort_modules_alphabetically,
-            style_files,
-            resource_suffix,
-            static_root_path,
-            fs: DocFS::new(&errors),
-            edition,
-            codes: ErrorCodes::from(UnstableFeatures::from_environment().is_nightly_build()),
-            playground,
-        };
-
-        // Add the default themes to the `Vec` of stylepaths
-        //
-        // Note that these must be added before `sources::render` is called
-        // so that the resulting source pages are styled
-        //
-        // `light.css` is not disabled because it is the stylesheet that stays loaded
-        // by the browser as the theme stylesheet. The theme system (hackily) works by
-        // changing the href to this stylesheet. All other themes are disabled to
-        // prevent rule conflicts
-        scx.style_files.push(StylePath { path: PathBuf::from("light.css"), disabled: false });
-        scx.style_files.push(StylePath { path: PathBuf::from("dark.css"), disabled: true });
-        scx.style_files.push(StylePath { path: PathBuf::from("ayu.css"), disabled: true });
-
-        let dst = output;
-        scx.ensure_dir(&dst)?;
-        krate = sources::render(&dst, &mut scx, krate)?;
-        let (new_crate, index, cache) =
-            Cache::from_krate(renderinfo, document_private, &extern_html_root_urls, &dst, krate);
-        krate = new_crate;
-        let cache = Arc::new(cache);
-        let mut cx = Context {
-            current: Vec::new(),
-            dst,
-            render_redirect_pages: false,
-            id_map: Rc::new(RefCell::new(id_map)),
-            shared: Arc::new(scx),
-            cache: cache.clone(),
-            parent,
-            all: Rc::new(RefCell::new(AllTypes::new())),
-            errors,
-        };
-
-        // Freeze the cache now that the index has been built. Put an Arc into TLS
-        // for future parallelization opportunities
-        CACHE_KEY.with(|v| *v.borrow_mut() = cache.clone());
-        CURRENT_DEPTH.with(|s| s.set(0));
-
-        // Write shared runs within a flock; disable thread dispatching of IO temporarily.
-        Arc::get_mut(&mut cx.shared).unwrap().fs.set_sync_only(true);
-        write_shared(&cx, &krate, index, &md_opts)?;
-        Arc::get_mut(&mut cx.shared).unwrap().fs.set_sync_only(false);
-        Ok((cx, krate))
-    }
-
-    fn after_run(&mut self, diag: &rustc_errors::Handler) -> Result<(), Error> {
-        let nb_errors =
-            Arc::get_mut(&mut self.errors).map_or_else(|| 0, |errors| errors.write_errors(diag));
-        if nb_errors > 0 {
-            Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), ""))
-        } else {
-            Ok(())
-        }
-    }
-
-    fn after_krate(&mut self, krate: &clean::Crate) -> Result<(), Error> {
-        let final_file = self.dst.join(&krate.name).join("all.html");
-        let settings_file = self.dst.join("settings.html");
-        let crate_name = krate.name.clone();
-
-        let mut root_path = self.dst.to_str().expect("invalid path").to_owned();
-        if !root_path.ends_with('/') {
-            root_path.push('/');
-        }
-        let mut page = layout::Page {
-            title: "List of all items in this crate",
-            css_class: "mod",
-            root_path: "../",
-            static_root_path: self.shared.static_root_path.as_deref(),
-            description: "List of all items in this crate",
-            keywords: BASIC_KEYWORDS,
-            resource_suffix: &self.shared.resource_suffix,
-            extra_scripts: &[],
-            static_extra_scripts: &[],
-        };
-        let sidebar = if let Some(ref version) = self.cache.crate_version {
-            format!(
-                "<p class='location'>Crate {}</p>\
-                     <div class='block version'>\
-                         <p>Version {}</p>\
-                     </div>\
-                     <a id='all-types' href='index.html'><p>Back to index</p></a>",
-                crate_name,
-                Escape(version),
-            )
-        } else {
-            String::new()
-        };
-        let all = self.all.replace(AllTypes::new());
-        let v = layout::render(
-            &self.shared.layout,
-            &page,
-            sidebar,
-            |buf: &mut Buffer| all.print(buf),
-            &self.shared.style_files,
-        );
-        self.shared.fs.write(&final_file, v.as_bytes())?;
-
-        // Generating settings page.
-        page.title = "Rustdoc settings";
-        page.description = "Settings of Rustdoc";
-        page.root_path = "./";
-
-        let mut style_files = self.shared.style_files.clone();
-        let sidebar = "<p class='location'>Settings</p><div class='sidebar-elems'></div>";
-        style_files.push(StylePath { path: PathBuf::from("settings.css"), disabled: false });
-        let v = layout::render(
-            &self.shared.layout,
-            &page,
-            sidebar,
-            settings(
-                self.shared.static_root_path.as_deref().unwrap_or("./"),
-                &self.shared.resource_suffix,
-            ),
-            &style_files,
-        );
-        self.shared.fs.write(&settings_file, v.as_bytes())?;
-        Ok(())
-    }
-
-    fn mod_item_in(
-        &mut self,
-        item: &clean::Item,
-        item_name: &str,
-        module: &clean::Module,
-    ) -> Result<(), Error> {
-        // Stripped modules survive the rustdoc passes (i.e., `strip-private`)
-        // if they contain impls for public types. These modules can also
-        // contain items such as publicly re-exported structures.
-        //
-        // External crates will provide links to these structures, so
-        // these modules are recursed into, but not rendered normally
-        // (a flag on the context).
-        if !self.render_redirect_pages {
-            self.render_redirect_pages = item.is_stripped();
-        }
-        let scx = &self.shared;
-        self.dst.push(item_name);
-        self.current.push(item_name.to_owned());
-
-        info!("Recursing into {}", self.dst.display());
-
-        let buf = self.render_item(item, false);
-        // buf will be empty if the module is stripped and there is no redirect for it
-        if !buf.is_empty() {
-            self.shared.ensure_dir(&self.dst)?;
-            let joint_dst = self.dst.join("index.html");
-            scx.fs.write(&joint_dst, buf.as_bytes())?;
-        }
-
-        // Render sidebar-items.js used throughout this module.
-        if !self.render_redirect_pages {
-            let items = self.build_sidebar_items(module);
-            let js_dst = self.dst.join("sidebar-items.js");
-            let v = format!("initSidebarItems({});", serde_json::to_string(&items).unwrap());
-            scx.fs.write(&js_dst, &v)?;
-        }
-        Ok(())
-    }
-
-    fn mod_item_out(&mut self) -> Result<(), Error> {
-        info!("Recursed; leaving {}", self.dst.display());
-
-        // Go back to where we were at
-        self.dst.pop();
-        self.current.pop();
-        Ok(())
-    }
-
-    fn item(&mut self, item: clean::Item) -> Result<(), Error> {
-        // Stripped modules survive the rustdoc passes (i.e., `strip-private`)
-        // if they contain impls for public types. These modules can also
-        // contain items such as publicly re-exported structures.
-        //
-        // External crates will provide links to these structures, so
-        // these modules are recursed into, but not rendered normally
-        // (a flag on the context).
-        if !self.render_redirect_pages {
-            self.render_redirect_pages = item.is_stripped();
-        }
-
-        let buf = self.render_item(&item, true);
-        // buf will be empty if the item is stripped and there is no redirect for it
-        if !buf.is_empty() {
-            let name = item.name.as_ref().unwrap();
-            let item_type = item.type_();
-            let file_name = &item_path(item_type, name);
-            self.shared.ensure_dir(&self.dst)?;
-            let joint_dst = self.dst.join(file_name);
-            self.shared.fs.write(&joint_dst, buf.as_bytes())?;
-
-            if !self.render_redirect_pages {
-                self.all.borrow_mut().append(full_path(self, &item), &item_type);
-            }
-            // If the item is a macro, redirect from the old macro URL (with !)
-            // to the new one (without).
-            if item_type == ItemType::Macro {
-                let redir_name = format!("{}.{}!.html", item_type, name);
-                let redir_dst = self.dst.join(redir_name);
-                let v = layout::redirect(file_name);
-                self.shared.fs.write(&redir_dst, v.as_bytes())?;
-            }
-        }
-        Ok(())
-    }
-}
-
-fn write_shared(
-    cx: &Context,
-    krate: &clean::Crate,
-    search_index: String,
-    options: &RenderOptions,
-) -> Result<(), Error> {
-    // Write out the shared files. Note that these are shared among all rustdoc
-    // docs placed in the output directory, so this needs to be a synchronized
-    // operation with respect to all other rustdocs running around.
-    let lock_file = cx.dst.join(".lock");
-    let _lock = try_err!(flock::Lock::new(&lock_file, true, true, true), &lock_file);
-
-    // Add all the static files. These may already exist, but we just
-    // overwrite them anyway to make sure that they're fresh and up-to-date.
-
-    write_minify(
-        &cx.shared.fs,
-        cx.path("rustdoc.css"),
-        static_files::RUSTDOC_CSS,
-        options.enable_minification,
-    )?;
-    write_minify(
-        &cx.shared.fs,
-        cx.path("settings.css"),
-        static_files::SETTINGS_CSS,
-        options.enable_minification,
-    )?;
-    write_minify(
-        &cx.shared.fs,
-        cx.path("noscript.css"),
-        static_files::NOSCRIPT_CSS,
-        options.enable_minification,
-    )?;
-
-    // To avoid "light.css" to be overwritten, we'll first run over the received themes and only
-    // then we'll run over the "official" styles.
-    let mut themes: FxHashSet<String> = FxHashSet::default();
-
-    for entry in &cx.shared.style_files {
-        let theme = try_none!(try_none!(entry.path.file_stem(), &entry.path).to_str(), &entry.path);
-        let extension =
-            try_none!(try_none!(entry.path.extension(), &entry.path).to_str(), &entry.path);
-
-        // Handle the official themes
-        match theme {
-            "light" => write_minify(
-                &cx.shared.fs,
-                cx.path("light.css"),
-                static_files::themes::LIGHT,
-                options.enable_minification,
-            )?,
-            "dark" => write_minify(
-                &cx.shared.fs,
-                cx.path("dark.css"),
-                static_files::themes::DARK,
-                options.enable_minification,
-            )?,
-            "ayu" => write_minify(
-                &cx.shared.fs,
-                cx.path("ayu.css"),
-                static_files::themes::AYU,
-                options.enable_minification,
-            )?,
-            _ => {
-                // Handle added third-party themes
-                let content = try_err!(fs::read(&entry.path), &entry.path);
-                cx.shared
-                    .fs
-                    .write(cx.path(&format!("{}.{}", theme, extension)), content.as_slice())?;
-            }
-        };
-
-        themes.insert(theme.to_owned());
-    }
-
-    let write = |p, c| cx.shared.fs.write(p, c);
-    if (*cx.shared).layout.logo.is_empty() {
-        write(cx.path("rust-logo.png"), static_files::RUST_LOGO)?;
-    }
-    if (*cx.shared).layout.favicon.is_empty() {
-        write(cx.path("favicon.ico"), static_files::RUST_FAVICON)?;
-    }
-    write(cx.path("brush.svg"), static_files::BRUSH_SVG)?;
-    write(cx.path("wheel.svg"), static_files::WHEEL_SVG)?;
-    write(cx.path("down-arrow.svg"), static_files::DOWN_ARROW_SVG)?;
-
-    let mut themes: Vec<&String> = themes.iter().collect();
-    themes.sort();
-    // To avoid theme switch latencies as much as possible, we put everything theme related
-    // at the beginning of the html files into another js file.
-    let theme_js = format!(
-        r#"var themes = document.getElementById("theme-choices");
-var themePicker = document.getElementById("theme-picker");
-
-function showThemeButtonState() {{
-    themes.style.display = "block";
-    themePicker.style.borderBottomRightRadius = "0";
-    themePicker.style.borderBottomLeftRadius = "0";
-}}
-
-function hideThemeButtonState() {{
-    themes.style.display = "none";
-    themePicker.style.borderBottomRightRadius = "3px";
-    themePicker.style.borderBottomLeftRadius = "3px";
-}}
-
-function switchThemeButtonState() {{
-    if (themes.style.display === "block") {{
-        hideThemeButtonState();
-    }} else {{
-        showThemeButtonState();
-    }}
-}};
-
-function handleThemeButtonsBlur(e) {{
-    var active = document.activeElement;
-    var related = e.relatedTarget;
-
-    if (active.id !== "themePicker" &&
-        (!active.parentNode || active.parentNode.id !== "theme-choices") &&
-        (!related ||
-         (related.id !== "themePicker" &&
-          (!related.parentNode || related.parentNode.id !== "theme-choices")))) {{
-        hideThemeButtonState();
-    }}
-}}
-
-themePicker.onclick = switchThemeButtonState;
-themePicker.onblur = handleThemeButtonsBlur;
-{}.forEach(function(item) {{
-    var but = document.createElement('button');
-    but.textContent = item;
-    but.onclick = function(el) {{
-        switchTheme(currentTheme, mainTheme, item, true);
-    }};
-    but.onblur = handleThemeButtonsBlur;
-    themes.appendChild(but);
-}});"#,
-        serde_json::to_string(&themes).unwrap()
-    );
-
-    write_minify(&cx.shared.fs, cx.path("theme.js"), &theme_js, options.enable_minification)?;
-    write_minify(
-        &cx.shared.fs,
-        cx.path("main.js"),
-        static_files::MAIN_JS,
-        options.enable_minification,
-    )?;
-    write_minify(
-        &cx.shared.fs,
-        cx.path("settings.js"),
-        static_files::SETTINGS_JS,
-        options.enable_minification,
-    )?;
-    if cx.shared.include_sources {
-        write_minify(
-            &cx.shared.fs,
-            cx.path("source-script.js"),
-            static_files::sidebar::SOURCE_SCRIPT,
-            options.enable_minification,
-        )?;
-    }
-
-    {
-        write_minify(
-            &cx.shared.fs,
-            cx.path("storage.js"),
-            &format!(
-                "var resourcesSuffix = \"{}\";{}",
-                cx.shared.resource_suffix,
-                static_files::STORAGE_JS
-            ),
-            options.enable_minification,
-        )?;
-    }
-
-    if let Some(ref css) = cx.shared.layout.css_file_extension {
-        let out = cx.path("theme.css");
-        let buffer = try_err!(fs::read_to_string(css), css);
-        if !options.enable_minification {
-            cx.shared.fs.write(&out, &buffer)?;
-        } else {
-            write_minify(&cx.shared.fs, out, &buffer, options.enable_minification)?;
-        }
-    }
-    write_minify(
-        &cx.shared.fs,
-        cx.path("normalize.css"),
-        static_files::NORMALIZE_CSS,
-        options.enable_minification,
-    )?;
-    write(cx.dst.join("FiraSans-Regular.woff"), static_files::fira_sans::REGULAR)?;
-    write(cx.dst.join("FiraSans-Medium.woff"), static_files::fira_sans::MEDIUM)?;
-    write(cx.dst.join("FiraSans-LICENSE.txt"), static_files::fira_sans::LICENSE)?;
-    write(cx.dst.join("SourceSerifPro-Regular.ttf.woff"), static_files::source_serif_pro::REGULAR)?;
-    write(cx.dst.join("SourceSerifPro-Bold.ttf.woff"), static_files::source_serif_pro::BOLD)?;
-    write(cx.dst.join("SourceSerifPro-It.ttf.woff"), static_files::source_serif_pro::ITALIC)?;
-    write(cx.dst.join("SourceSerifPro-LICENSE.md"), static_files::source_serif_pro::LICENSE)?;
-    write(cx.dst.join("SourceCodePro-Regular.woff"), static_files::source_code_pro::REGULAR)?;
-    write(cx.dst.join("SourceCodePro-Semibold.woff"), static_files::source_code_pro::SEMIBOLD)?;
-    write(cx.dst.join("SourceCodePro-LICENSE.txt"), static_files::source_code_pro::LICENSE)?;
-    write(cx.dst.join("LICENSE-MIT.txt"), static_files::LICENSE_MIT)?;
-    write(cx.dst.join("LICENSE-APACHE.txt"), static_files::LICENSE_APACHE)?;
-    write(cx.dst.join("COPYRIGHT.txt"), static_files::COPYRIGHT)?;
-
-    fn collect(path: &Path, krate: &str, key: &str) -> io::Result<(Vec<String>, Vec<String>)> {
-        let mut ret = Vec::new();
-        let mut krates = Vec::new();
-
-        if path.exists() {
-            for line in BufReader::new(File::open(path)?).lines() {
-                let line = line?;
-                if !line.starts_with(key) {
-                    continue;
-                }
-                if line.starts_with(&format!(r#"{}["{}"]"#, key, krate)) {
-                    continue;
-                }
-                ret.push(line.to_string());
-                krates.push(
-                    line[key.len() + 2..]
-                        .split('"')
-                        .next()
-                        .map(|s| s.to_owned())
-                        .unwrap_or_else(String::new),
-                );
-            }
-        }
-        Ok((ret, krates))
-    }
-
-    fn collect_json(path: &Path, krate: &str) -> io::Result<(Vec<String>, Vec<String>)> {
-        let mut ret = Vec::new();
-        let mut krates = Vec::new();
-
-        if path.exists() {
-            for line in BufReader::new(File::open(path)?).lines() {
-                let line = line?;
-                if !line.starts_with('"') {
-                    continue;
-                }
-                if line.starts_with(&format!("\"{}\"", krate)) {
-                    continue;
-                }
-                if line.ends_with(",\\") {
-                    ret.push(line[..line.len() - 2].to_string());
-                } else {
-                    // Ends with "\\" (it's the case for the last added crate line)
-                    ret.push(line[..line.len() - 1].to_string());
-                }
-                krates.push(
-                    line.split('"')
-                        .find(|s| !s.is_empty())
-                        .map(|s| s.to_owned())
-                        .unwrap_or_else(String::new),
-                );
-            }
-        }
-        Ok((ret, krates))
-    }
-
-    use std::ffi::OsString;
-
-    #[derive(Debug)]
-    struct Hierarchy {
-        elem: OsString,
-        children: FxHashMap<OsString, Hierarchy>,
-        elems: FxHashSet<OsString>,
-    }
-
-    impl Hierarchy {
-        fn new(elem: OsString) -> Hierarchy {
-            Hierarchy { elem, children: FxHashMap::default(), elems: FxHashSet::default() }
-        }
-
-        fn to_json_string(&self) -> String {
-            let mut subs: Vec<&Hierarchy> = self.children.values().collect();
-            subs.sort_unstable_by(|a, b| a.elem.cmp(&b.elem));
-            let mut files = self
-                .elems
-                .iter()
-                .map(|s| format!("\"{}\"", s.to_str().expect("invalid osstring conversion")))
-                .collect::<Vec<_>>();
-            files.sort_unstable_by(|a, b| a.cmp(b));
-            let subs = subs.iter().map(|s| s.to_json_string()).collect::<Vec<_>>().join(",");
-            let dirs =
-                if subs.is_empty() { String::new() } else { format!(",\"dirs\":[{}]", subs) };
-            let files = files.join(",");
-            let files =
-                if files.is_empty() { String::new() } else { format!(",\"files\":[{}]", files) };
-            format!(
-                "{{\"name\":\"{name}\"{dirs}{files}}}",
-                name = self.elem.to_str().expect("invalid osstring conversion"),
-                dirs = dirs,
-                files = files
-            )
-        }
-    }
-
-    if cx.shared.include_sources {
-        let mut hierarchy = Hierarchy::new(OsString::new());
-        for source in cx
-            .shared
-            .local_sources
-            .iter()
-            .filter_map(|p| p.0.strip_prefix(&cx.shared.src_root).ok())
-        {
-            let mut h = &mut hierarchy;
-            let mut elems = source
-                .components()
-                .filter_map(|s| match s {
-                    Component::Normal(s) => Some(s.to_owned()),
-                    _ => None,
-                })
-                .peekable();
-            loop {
-                let cur_elem = elems.next().expect("empty file path");
-                if elems.peek().is_none() {
-                    h.elems.insert(cur_elem);
-                    break;
-                } else {
-                    let e = cur_elem.clone();
-                    h.children.entry(cur_elem.clone()).or_insert_with(|| Hierarchy::new(e));
-                    h = h.children.get_mut(&cur_elem).expect("not found child");
-                }
-            }
-        }
-
-        let dst = cx.dst.join(&format!("source-files{}.js", cx.shared.resource_suffix));
-        let (mut all_sources, _krates) = try_err!(collect(&dst, &krate.name, "sourcesIndex"), &dst);
-        all_sources.push(format!(
-            "sourcesIndex[\"{}\"] = {};",
-            &krate.name,
-            hierarchy.to_json_string()
-        ));
-        all_sources.sort();
-        let v = format!(
-            "var N = null;var sourcesIndex = {{}};\n{}\ncreateSourceSidebar();\n",
-            all_sources.join("\n")
-        );
-        cx.shared.fs.write(&dst, v.as_bytes())?;
-    }
-
-    // Update the search index
-    let dst = cx.dst.join(&format!("search-index{}.js", cx.shared.resource_suffix));
-    let (mut all_indexes, mut krates) = try_err!(collect_json(&dst, &krate.name), &dst);
-    all_indexes.push(search_index);
-
-    // Sort the indexes by crate so the file will be generated identically even
-    // with rustdoc running in parallel.
-    all_indexes.sort();
-    {
-        let mut v = String::from("var searchIndex = JSON.parse('{\\\n");
-        v.push_str(&all_indexes.join(",\\\n"));
-        // "addSearchOptions" has to be called first so the crate filtering can be set before the
-        // search might start (if it's set into the URL for example).
-        v.push_str("\\\n}');\naddSearchOptions(searchIndex);initSearch(searchIndex);");
-        cx.shared.fs.write(&dst, &v)?;
-    }
-    if options.enable_index_page {
-        if let Some(index_page) = options.index_page.clone() {
-            let mut md_opts = options.clone();
-            md_opts.output = cx.dst.clone();
-            md_opts.external_html = (*cx.shared).layout.external_html.clone();
-
-            crate::markdown::render(&index_page, md_opts, cx.shared.edition)
-                .map_err(|e| Error::new(e, &index_page))?;
-        } else {
-            let dst = cx.dst.join("index.html");
-            let page = layout::Page {
-                title: "Index of crates",
-                css_class: "mod",
-                root_path: "./",
-                static_root_path: cx.shared.static_root_path.as_deref(),
-                description: "List of crates",
-                keywords: BASIC_KEYWORDS,
-                resource_suffix: &cx.shared.resource_suffix,
-                extra_scripts: &[],
-                static_extra_scripts: &[],
-            };
-            krates.push(krate.name.clone());
-            krates.sort();
-            krates.dedup();
-
-            let content = format!(
-                "<h1 class='fqn'>\
-     <span class='in-band'>List of all crates</span>\
-</h1><ul class='mod'>{}</ul>",
-                krates
-                    .iter()
-                    .map(|s| {
-                        format!("<li><a href=\"{}index.html\">{}</li>", ensure_trailing_slash(s), s)
-                    })
-                    .collect::<String>()
-            );
-            let v = layout::render(&cx.shared.layout, &page, "", content, &cx.shared.style_files);
-            cx.shared.fs.write(&dst, v.as_bytes())?;
-        }
-    }
-
-    // Update the list of all implementors for traits
-    let dst = cx.dst.join("implementors");
-    for (&did, imps) in &cx.cache.implementors {
-        // Private modules can leak through to this phase of rustdoc, which
-        // could contain implementations for otherwise private types. In some
-        // rare cases we could find an implementation for an item which wasn't
-        // indexed, so we just skip this step in that case.
-        //
-        // FIXME: this is a vague explanation for why this can't be a `get`, in
-        //        theory it should be...
-        let &(ref remote_path, remote_item_type) = match cx.cache.paths.get(&did) {
-            Some(p) => p,
-            None => match cx.cache.external_paths.get(&did) {
-                Some(p) => p,
-                None => continue,
-            },
-        };
-
-        #[derive(Serialize)]
-        struct Implementor {
-            text: String,
-            synthetic: bool,
-            types: Vec<String>,
-        }
-
-        let implementors = imps
-            .iter()
-            .filter_map(|imp| {
-                // If the trait and implementation are in the same crate, then
-                // there's no need to emit information about it (there's inlining
-                // going on). If they're in different crates then the crate defining
-                // the trait will be interested in our implementation.
-                //
-                // If the implementation is from another crate then that crate
-                // should add it.
-                if imp.impl_item.def_id.krate == did.krate || !imp.impl_item.def_id.is_local() {
-                    None
-                } else {
-                    Some(Implementor {
-                        text: imp.inner_impl().print().to_string(),
-                        synthetic: imp.inner_impl().synthetic,
-                        types: collect_paths_for_type(imp.inner_impl().for_.clone()),
-                    })
-                }
-            })
-            .collect::<Vec<_>>();
-
-        // Only create a js file if we have impls to add to it. If the trait is
-        // documented locally though we always create the file to avoid dead
-        // links.
-        if implementors.is_empty() && !cx.cache.paths.contains_key(&did) {
-            continue;
-        }
-
-        let implementors = format!(
-            r#"implementors["{}"] = {};"#,
-            krate.name,
-            serde_json::to_string(&implementors).unwrap()
-        );
-
-        let mut mydst = dst.clone();
-        for part in &remote_path[..remote_path.len() - 1] {
-            mydst.push(part);
-        }
-        cx.shared.ensure_dir(&mydst)?;
-        mydst.push(&format!("{}.{}.js", remote_item_type, remote_path[remote_path.len() - 1]));
-
-        let (mut all_implementors, _) =
-            try_err!(collect(&mydst, &krate.name, "implementors"), &mydst);
-        all_implementors.push(implementors);
-        // Sort the implementors by crate so the file will be generated
-        // identically even with rustdoc running in parallel.
-        all_implementors.sort();
-
-        let mut v = String::from("(function() {var implementors = {};\n");
-        for implementor in &all_implementors {
-            writeln!(v, "{}", *implementor).unwrap();
-        }
-        v.push_str(
-            "if (window.register_implementors) {\
-                 window.register_implementors(implementors);\
-             } else {\
-                 window.pending_implementors = implementors;\
-             }",
-        );
-        v.push_str("})()");
-        cx.shared.fs.write(&mydst, &v)?;
-    }
-    Ok(())
-}
-
-fn write_minify(
-    fs: &DocFS,
-    dst: PathBuf,
-    contents: &str,
-    enable_minification: bool,
-) -> Result<(), Error> {
-    if enable_minification {
-        if dst.extension() == Some(&OsStr::new("css")) {
-            let res = try_none!(minifier::css::minify(contents).ok(), &dst);
-            fs.write(dst, res.as_bytes())
-        } else {
-            fs.write(dst, minifier::js::minify(contents).as_bytes())
-        }
-    } else {
-        fs.write(dst, contents.as_bytes())
-    }
-}
-
-#[derive(Debug, Eq, PartialEq, Hash)]
-struct ItemEntry {
-    url: String,
-    name: String,
-}
-
-impl ItemEntry {
-    fn new(mut url: String, name: String) -> ItemEntry {
-        while url.starts_with('/') {
-            url.remove(0);
-        }
-        ItemEntry { url, name }
-    }
-}
-
-impl ItemEntry {
-    crate fn print(&self) -> impl fmt::Display + '_ {
-        crate::html::format::display_fn(move |f| {
-            write!(f, "<a href='{}'>{}</a>", self.url, Escape(&self.name))
-        })
-    }
-}
-
-impl PartialOrd for ItemEntry {
-    fn partial_cmp(&self, other: &ItemEntry) -> Option<::std::cmp::Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-impl Ord for ItemEntry {
-    fn cmp(&self, other: &ItemEntry) -> ::std::cmp::Ordering {
-        self.name.cmp(&other.name)
-    }
-}
-
-#[derive(Debug)]
-struct AllTypes {
-    structs: FxHashSet<ItemEntry>,
-    enums: FxHashSet<ItemEntry>,
-    unions: FxHashSet<ItemEntry>,
-    primitives: FxHashSet<ItemEntry>,
-    traits: FxHashSet<ItemEntry>,
-    macros: FxHashSet<ItemEntry>,
-    functions: FxHashSet<ItemEntry>,
-    typedefs: FxHashSet<ItemEntry>,
-    opaque_tys: FxHashSet<ItemEntry>,
-    statics: FxHashSet<ItemEntry>,
-    constants: FxHashSet<ItemEntry>,
-    keywords: FxHashSet<ItemEntry>,
-    attributes: FxHashSet<ItemEntry>,
-    derives: FxHashSet<ItemEntry>,
-    trait_aliases: FxHashSet<ItemEntry>,
-}
-
-impl AllTypes {
-    fn new() -> AllTypes {
-        let new_set = |cap| FxHashSet::with_capacity_and_hasher(cap, Default::default());
-        AllTypes {
-            structs: new_set(100),
-            enums: new_set(100),
-            unions: new_set(100),
-            primitives: new_set(26),
-            traits: new_set(100),
-            macros: new_set(100),
-            functions: new_set(100),
-            typedefs: new_set(100),
-            opaque_tys: new_set(100),
-            statics: new_set(100),
-            constants: new_set(100),
-            keywords: new_set(100),
-            attributes: new_set(100),
-            derives: new_set(100),
-            trait_aliases: new_set(100),
-        }
-    }
-
-    fn append(&mut self, item_name: String, item_type: &ItemType) {
-        let mut url: Vec<_> = item_name.split("::").skip(1).collect();
-        if let Some(name) = url.pop() {
-            let new_url = format!("{}/{}.{}.html", url.join("/"), item_type, name);
-            url.push(name);
-            let name = url.join("::");
-            match *item_type {
-                ItemType::Struct => self.structs.insert(ItemEntry::new(new_url, name)),
-                ItemType::Enum => self.enums.insert(ItemEntry::new(new_url, name)),
-                ItemType::Union => self.unions.insert(ItemEntry::new(new_url, name)),
-                ItemType::Primitive => self.primitives.insert(ItemEntry::new(new_url, name)),
-                ItemType::Trait => self.traits.insert(ItemEntry::new(new_url, name)),
-                ItemType::Macro => self.macros.insert(ItemEntry::new(new_url, name)),
-                ItemType::Function => self.functions.insert(ItemEntry::new(new_url, name)),
-                ItemType::Typedef => self.typedefs.insert(ItemEntry::new(new_url, name)),
-                ItemType::OpaqueTy => self.opaque_tys.insert(ItemEntry::new(new_url, name)),
-                ItemType::Static => self.statics.insert(ItemEntry::new(new_url, name)),
-                ItemType::Constant => self.constants.insert(ItemEntry::new(new_url, name)),
-                ItemType::ProcAttribute => self.attributes.insert(ItemEntry::new(new_url, name)),
-                ItemType::ProcDerive => self.derives.insert(ItemEntry::new(new_url, name)),
-                ItemType::TraitAlias => self.trait_aliases.insert(ItemEntry::new(new_url, name)),
-                _ => true,
-            };
-        }
-    }
-}
-
-fn print_entries(f: &mut Buffer, e: &FxHashSet<ItemEntry>, title: &str, class: &str) {
-    if !e.is_empty() {
-        let mut e: Vec<&ItemEntry> = e.iter().collect();
-        e.sort();
-        write!(
-            f,
-            "<h3 id='{}'>{}</h3><ul class='{} docblock'>{}</ul>",
-            title,
-            Escape(title),
-            class,
-            e.iter().map(|s| format!("<li>{}</li>", s.print())).collect::<String>()
-        );
-    }
-}
-
-impl AllTypes {
-    fn print(self, f: &mut Buffer) {
-        write!(
-            f,
-            "<h1 class='fqn'>\
-        <span class='out-of-band'>\
-            <span id='render-detail'>\
-                <a id=\"toggle-all-docs\" href=\"javascript:void(0)\" title=\"collapse all docs\">\
-                    [<span class='inner'>&#x2212;</span>]\
-                </a>\
-            </span>
-        </span>
-        <span class='in-band'>List of all items</span>\
-    </h1>"
-        );
-        print_entries(f, &self.structs, "Structs", "structs");
-        print_entries(f, &self.enums, "Enums", "enums");
-        print_entries(f, &self.unions, "Unions", "unions");
-        print_entries(f, &self.primitives, "Primitives", "primitives");
-        print_entries(f, &self.traits, "Traits", "traits");
-        print_entries(f, &self.macros, "Macros", "macros");
-        print_entries(f, &self.attributes, "Attribute Macros", "attributes");
-        print_entries(f, &self.derives, "Derive Macros", "derives");
-        print_entries(f, &self.functions, "Functions", "functions");
-        print_entries(f, &self.typedefs, "Typedefs", "typedefs");
-        print_entries(f, &self.trait_aliases, "Trait Aliases", "trait-aliases");
-        print_entries(f, &self.opaque_tys, "Opaque Types", "opaque-types");
-        print_entries(f, &self.statics, "Statics", "statics");
-        print_entries(f, &self.constants, "Constants", "constants")
-    }
-}
-
-#[derive(Debug)]
-enum Setting {
-    Section { description: &'static str, sub_settings: Vec<Setting> },
-    Entry { js_data_name: &'static str, description: &'static str, default_value: bool },
-}
-
-impl Setting {
-    fn display(&self) -> String {
-        match *self {
-            Setting::Section { ref description, ref sub_settings } => format!(
-                "<div class='setting-line'>\
-                        <div class='title'>{}</div>\
-                        <div class='sub-settings'>{}</div>
-                    </div>",
-                description,
-                sub_settings.iter().map(|s| s.display()).collect::<String>()
-            ),
-            Setting::Entry { ref js_data_name, ref description, ref default_value } => format!(
-                "<div class='setting-line'>\
-                        <label class='toggle'>\
-                        <input type='checkbox' id='{}' {}>\
-                        <span class='slider'></span>\
-                        </label>\
-                        <div>{}</div>\
-                    </div>",
-                js_data_name,
-                if *default_value { " checked" } else { "" },
-                description,
-            ),
-        }
-    }
-}
-
-impl From<(&'static str, &'static str, bool)> for Setting {
-    fn from(values: (&'static str, &'static str, bool)) -> Setting {
-        Setting::Entry { js_data_name: values.0, description: values.1, default_value: values.2 }
-    }
-}
-
-impl<T: Into<Setting>> From<(&'static str, Vec<T>)> for Setting {
-    fn from(values: (&'static str, Vec<T>)) -> Setting {
-        Setting::Section {
-            description: values.0,
-            sub_settings: values.1.into_iter().map(|v| v.into()).collect::<Vec<_>>(),
-        }
-    }
-}
-
-fn settings(root_path: &str, suffix: &str) -> String {
-    // (id, explanation, default value)
-    let settings: &[Setting] = &[
-        (
-            "Auto-hide item declarations",
-            vec![
-                ("auto-hide-struct", "Auto-hide structs declaration", true),
-                ("auto-hide-enum", "Auto-hide enums declaration", false),
-                ("auto-hide-union", "Auto-hide unions declaration", true),
-                ("auto-hide-trait", "Auto-hide traits declaration", true),
-                ("auto-hide-macro", "Auto-hide macros declaration", false),
-            ],
-        )
-            .into(),
-        ("auto-hide-attributes", "Auto-hide item attributes.", true).into(),
-        ("auto-hide-method-docs", "Auto-hide item methods' documentation", false).into(),
-        ("auto-hide-trait-implementations", "Auto-hide trait implementation documentation", true)
-            .into(),
-        ("auto-collapse-implementors", "Auto-hide implementors of a trait", true).into(),
-        ("go-to-only-result", "Directly go to item in search if there is only one result", false)
-            .into(),
-        ("line-numbers", "Show line numbers on code examples", false).into(),
-        ("disable-shortcuts", "Disable keyboard shortcuts", false).into(),
-    ];
-    format!(
-        "<h1 class='fqn'>\
-    <span class='in-band'>Rustdoc settings</span>\
-</h1>\
-<div class='settings'>{}</div>\
-<script src='{}settings{}.js'></script>",
-        settings.iter().map(|s| s.display()).collect::<String>(),
-        root_path,
-        suffix
-    )
-}
-
-impl Context {
-    fn derive_id(&self, id: String) -> String {
-        let mut map = self.id_map.borrow_mut();
-        map.derive(id)
-    }
-
-    /// String representation of how to get back to the root path of the 'doc/'
-    /// folder in terms of a relative URL.
-    fn root_path(&self) -> String {
-        "../".repeat(self.current.len())
-    }
-
-    fn render_item(&self, it: &clean::Item, pushname: bool) -> String {
-        // A little unfortunate that this is done like this, but it sure
-        // does make formatting *a lot* nicer.
-        CURRENT_DEPTH.with(|slot| {
-            slot.set(self.current.len());
-        });
-
-        let mut title = if it.is_primitive() || it.is_keyword() {
-            // No need to include the namespace for primitive types and keywords
-            String::new()
-        } else {
-            self.current.join("::")
-        };
-        if pushname {
-            if !title.is_empty() {
-                title.push_str("::");
-            }
-            title.push_str(it.name.as_ref().unwrap());
-        }
-        title.push_str(" - Rust");
-        let tyname = it.type_();
-        let desc = if it.is_crate() {
-            format!("API documentation for the Rust `{}` crate.", self.shared.layout.krate)
-        } else {
-            format!(
-                "API documentation for the Rust `{}` {} in crate `{}`.",
-                it.name.as_ref().unwrap(),
-                tyname,
-                self.shared.layout.krate
-            )
-        };
-        let keywords = make_item_keywords(it);
-        let page = layout::Page {
-            css_class: tyname.as_str(),
-            root_path: &self.root_path(),
-            static_root_path: self.shared.static_root_path.as_deref(),
-            title: &title,
-            description: &desc,
-            keywords: &keywords,
-            resource_suffix: &self.shared.resource_suffix,
-            extra_scripts: &[],
-            static_extra_scripts: &[],
-        };
-
-        {
-            self.id_map.borrow_mut().reset();
-            self.id_map.borrow_mut().populate(initial_ids());
-        }
-
-        if !self.render_redirect_pages {
-            layout::render(
-                &self.shared.layout,
-                &page,
-                |buf: &mut _| print_sidebar(self, it, buf),
-                |buf: &mut _| print_item(self, it, buf),
-                &self.shared.style_files,
-            )
-        } else {
-            let mut url = self.root_path();
-            if let Some(&(ref names, ty)) = self.cache.paths.get(&it.def_id) {
-                for name in &names[..names.len() - 1] {
-                    url.push_str(name);
-                    url.push_str("/");
-                }
-                url.push_str(&item_path(ty, names.last().unwrap()));
-                layout::redirect(&url)
-            } else {
-                String::new()
-            }
-        }
-    }
-
-    fn build_sidebar_items(&self, m: &clean::Module) -> BTreeMap<String, Vec<NameDoc>> {
-        // BTreeMap instead of HashMap to get a sorted output
-        let mut map: BTreeMap<_, Vec<_>> = BTreeMap::new();
-        for item in &m.items {
-            if item.is_stripped() {
-                continue;
-            }
-
-            let short = item.type_();
-            let myname = match item.name {
-                None => continue,
-                Some(ref s) => s.to_string(),
-            };
-            let short = short.to_string();
-            map.entry(short)
-                .or_default()
-                .push((myname, Some(plain_summary_line(item.doc_value()))));
-        }
-
-        if self.shared.sort_modules_alphabetically {
-            for items in map.values_mut() {
-                items.sort();
-            }
-        }
-        map
-    }
-}
-
-impl Context {
-    /// Generates a url appropriate for an `href` attribute back to the source of
-    /// this item.
-    ///
-    /// The url generated, when clicked, will redirect the browser back to the
-    /// original source code.
-    ///
-    /// If `None` is returned, then a source link couldn't be generated. This
-    /// may happen, for example, with externally inlined items where the source
-    /// of their crate documentation isn't known.
-    fn src_href(&self, item: &clean::Item) -> Option<String> {
-        let mut root = self.root_path();
-
-        let mut path = String::new();
-
-        // We can safely ignore synthetic `SourceFile`s.
-        let file = match item.source.filename {
-            FileName::Real(ref path) => path.local_path().to_path_buf(),
-            _ => return None,
-        };
-        let file = &file;
-
-        let (krate, path) = if item.source.cnum == LOCAL_CRATE {
-            if let Some(path) = self.shared.local_sources.get(file) {
-                (&self.shared.layout.krate, path)
-            } else {
-                return None;
-            }
-        } else {
-            let (krate, src_root) = match *self.cache.extern_locations.get(&item.source.cnum)? {
-                (ref name, ref src, Local) => (name, src),
-                (ref name, ref src, Remote(ref s)) => {
-                    root = s.to_string();
-                    (name, src)
-                }
-                (_, _, Unknown) => return None,
-            };
-
-            sources::clean_path(&src_root, file, false, |component| {
-                path.push_str(&component.to_string_lossy());
-                path.push('/');
-            });
-            let mut fname = file.file_name().expect("source has no filename").to_os_string();
-            fname.push(".html");
-            path.push_str(&fname.to_string_lossy());
-            (krate, &path)
-        };
-
-        let lines = if item.source.loline == item.source.hiline {
-            item.source.loline.to_string()
-        } else {
-            format!("{}-{}", item.source.loline, item.source.hiline)
-        };
-        Some(format!(
-            "{root}src/{krate}/{path}#{lines}",
-            root = Escape(&root),
-            krate = krate,
-            path = path,
-            lines = lines
-        ))
-    }
-}
-
-fn wrap_into_docblock<F>(w: &mut Buffer, f: F)
-where
-    F: FnOnce(&mut Buffer),
-{
-    write!(w, "<div class=\"docblock type-decl hidden-by-usual-hider\">");
-    f(w);
-    write!(w, "</div>")
-}
-
-fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
-    debug_assert!(!item.is_stripped());
-    // Write the breadcrumb trail header for the top
-    write!(buf, "<h1 class='fqn'><span class='out-of-band'>");
-    if let Some(version) = item.stable_since() {
-        write!(
-            buf,
-            "<span class='since' title='Stable since Rust version {0}'>{0}</span>",
-            version
-        );
-    }
-    write!(
-        buf,
-        "<span id='render-detail'>\
-                <a id=\"toggle-all-docs\" href=\"javascript:void(0)\" \
-                    title=\"collapse all docs\">\
-                    [<span class='inner'>&#x2212;</span>]\
-                </a>\
-            </span>"
-    );
-
-    // Write `src` tag
-    //
-    // When this item is part of a `pub use` in a downstream crate, the
-    // [src] link in the downstream documentation will actually come back to
-    // this page, and this link will be auto-clicked. The `id` attribute is
-    // used to find the link to auto-click.
-    if cx.shared.include_sources && !item.is_primitive() {
-        if let Some(l) = cx.src_href(item) {
-            write!(buf, "<a class='srclink' href='{}' title='{}'>[src]</a>", l, "goto source code");
-        }
-    }
-
-    write!(buf, "</span>"); // out-of-band
-    write!(buf, "<span class='in-band'>");
-    let name = match item.inner {
-        clean::ModuleItem(ref m) => {
-            if m.is_crate {
-                "Crate "
-            } else {
-                "Module "
-            }
-        }
-        clean::FunctionItem(..) | clean::ForeignFunctionItem(..) => "Function ",
-        clean::TraitItem(..) => "Trait ",
-        clean::StructItem(..) => "Struct ",
-        clean::UnionItem(..) => "Union ",
-        clean::EnumItem(..) => "Enum ",
-        clean::TypedefItem(..) => "Type Definition ",
-        clean::MacroItem(..) => "Macro ",
-        clean::ProcMacroItem(ref mac) => match mac.kind {
-            MacroKind::Bang => "Macro ",
-            MacroKind::Attr => "Attribute Macro ",
-            MacroKind::Derive => "Derive Macro ",
-        },
-        clean::PrimitiveItem(..) => "Primitive Type ",
-        clean::StaticItem(..) | clean::ForeignStaticItem(..) => "Static ",
-        clean::ConstantItem(..) => "Constant ",
-        clean::ForeignTypeItem => "Foreign Type ",
-        clean::KeywordItem(..) => "Keyword ",
-        clean::OpaqueTyItem(..) => "Opaque Type ",
-        clean::TraitAliasItem(..) => "Trait Alias ",
-        _ => {
-            // We don't generate pages for any other type.
-            unreachable!();
-        }
-    };
-    buf.write_str(name);
-    if !item.is_primitive() && !item.is_keyword() {
-        let cur = &cx.current;
-        let amt = if item.is_mod() { cur.len() - 1 } else { cur.len() };
-        for (i, component) in cur.iter().enumerate().take(amt) {
-            write!(
-                buf,
-                "<a href='{}index.html'>{}</a>::<wbr>",
-                "../".repeat(cur.len() - i - 1),
-                component
-            );
-        }
-    }
-    write!(buf, "<a class=\"{}\" href=''>{}</a>", item.type_(), item.name.as_ref().unwrap());
-
-    write!(buf, "</span></h1>"); // in-band
-
-    match item.inner {
-        clean::ModuleItem(ref m) => item_module(buf, cx, item, &m.items),
-        clean::FunctionItem(ref f) | clean::ForeignFunctionItem(ref f) => {
-            item_function(buf, cx, item, f)
-        }
-        clean::TraitItem(ref t) => item_trait(buf, cx, item, t),
-        clean::StructItem(ref s) => item_struct(buf, cx, item, s),
-        clean::UnionItem(ref s) => item_union(buf, cx, item, s),
-        clean::EnumItem(ref e) => item_enum(buf, cx, item, e),
-        clean::TypedefItem(ref t, _) => item_typedef(buf, cx, item, t),
-        clean::MacroItem(ref m) => item_macro(buf, cx, item, m),
-        clean::ProcMacroItem(ref m) => item_proc_macro(buf, cx, item, m),
-        clean::PrimitiveItem(_) => item_primitive(buf, cx, item),
-        clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) => item_static(buf, cx, item, i),
-        clean::ConstantItem(ref c) => item_constant(buf, cx, item, c),
-        clean::ForeignTypeItem => item_foreign_type(buf, cx, item),
-        clean::KeywordItem(_) => item_keyword(buf, cx, item),
-        clean::OpaqueTyItem(ref e, _) => item_opaque_ty(buf, cx, item, e),
-        clean::TraitAliasItem(ref ta) => item_trait_alias(buf, cx, item, ta),
-        _ => {
-            // We don't generate pages for any other type.
-            unreachable!();
-        }
-    }
-}
-
-fn item_path(ty: ItemType, name: &str) -> String {
-    match ty {
-        ItemType::Module => format!("{}index.html", ensure_trailing_slash(name)),
-        _ => format!("{}.{}.html", ty, name),
-    }
-}
-
-fn full_path(cx: &Context, item: &clean::Item) -> String {
-    let mut s = cx.current.join("::");
-    s.push_str("::");
-    s.push_str(item.name.as_ref().unwrap());
-    s
-}
-
-#[inline]
-fn plain_summary_line(s: Option<&str>) -> String {
-    let s = s.unwrap_or("");
-    // This essentially gets the first paragraph of text in one line.
-    let mut line = s
-        .lines()
-        .skip_while(|line| line.chars().all(|c| c.is_whitespace()))
-        .take_while(|line| line.chars().any(|c| !c.is_whitespace()))
-        .fold(String::new(), |mut acc, line| {
-            acc.push_str(line);
-            acc.push(' ');
-            acc
-        });
-    // remove final whitespace
-    line.pop();
-    markdown::plain_summary_line(&line[..])
-}
-
-fn shorten(s: String) -> String {
-    if s.chars().count() > 60 {
-        let mut len = 0;
-        let mut ret = s
-            .split_whitespace()
-            .take_while(|p| {
-                // + 1 for the added character after the word.
-                len += p.chars().count() + 1;
-                len < 60
-            })
-            .collect::<Vec<_>>()
-            .join(" ");
-        ret.push('…');
-        ret
-    } else {
-        s
-    }
-}
-
-fn document(w: &mut Buffer, cx: &Context, item: &clean::Item) {
-    if let Some(ref name) = item.name {
-        info!("Documenting {}", name);
-    }
-    document_stability(w, cx, item, false);
-    document_full(w, item, cx, "", false);
-}
-
-/// Render md_text as markdown.
-fn render_markdown(
-    w: &mut Buffer,
-    cx: &Context,
-    md_text: &str,
-    links: Vec<(String, String)>,
-    prefix: &str,
-    is_hidden: bool,
-) {
-    let mut ids = cx.id_map.borrow_mut();
-    write!(
-        w,
-        "<div class='docblock{}'>{}{}</div>",
-        if is_hidden { " hidden" } else { "" },
-        prefix,
-        Markdown(
-            md_text,
-            &links,
-            &mut ids,
-            cx.shared.codes,
-            cx.shared.edition,
-            &cx.shared.playground
-        )
-        .into_string()
-    )
-}
-
-fn document_short(
-    w: &mut Buffer,
-    cx: &Context,
-    item: &clean::Item,
-    link: AssocItemLink<'_>,
-    prefix: &str,
-    is_hidden: bool,
-) {
-    if let Some(s) = item.doc_value() {
-        let markdown = if s.contains('\n') {
-            format!(
-                "{} [Read more]({})",
-                &plain_summary_line(Some(s)),
-                naive_assoc_href(item, link)
-            )
-        } else {
-            plain_summary_line(Some(s))
-        };
-        render_markdown(w, cx, &markdown, item.links(), prefix, is_hidden);
-    } else if !prefix.is_empty() {
-        write!(
-            w,
-            "<div class='docblock{}'>{}</div>",
-            if is_hidden { " hidden" } else { "" },
-            prefix
-        );
-    }
-}
-
-fn document_full(w: &mut Buffer, item: &clean::Item, cx: &Context, prefix: &str, is_hidden: bool) {
-    if let Some(s) = cx.shared.maybe_collapsed_doc_value(item) {
-        debug!("Doc block: =====\n{}\n=====", s);
-        render_markdown(w, cx, &*s, item.links(), prefix, is_hidden);
-    } else if !prefix.is_empty() {
-        write!(
-            w,
-            "<div class='docblock{}'>{}</div>",
-            if is_hidden { " hidden" } else { "" },
-            prefix
-        );
-    }
-}
-
-fn document_stability(w: &mut Buffer, cx: &Context, item: &clean::Item, is_hidden: bool) {
-    let stabilities = short_stability(item, cx);
-    if !stabilities.is_empty() {
-        write!(w, "<div class='stability{}'>", if is_hidden { " hidden" } else { "" });
-        for stability in stabilities {
-            write!(w, "{}", stability);
-        }
-        write!(w, "</div>");
-    }
-}
-
-fn document_non_exhaustive_header(item: &clean::Item) -> &str {
-    if item.is_non_exhaustive() { " (Non-exhaustive)" } else { "" }
-}
-
-fn document_non_exhaustive(w: &mut Buffer, item: &clean::Item) {
-    if item.is_non_exhaustive() {
-        write!(w, "<div class='docblock non-exhaustive non-exhaustive-{}'>", {
-            if item.is_struct() {
-                "struct"
-            } else if item.is_enum() {
-                "enum"
-            } else if item.is_variant() {
-                "variant"
-            } else {
-                "type"
-            }
-        });
-
-        if item.is_struct() {
-            write!(
-                w,
-                "Non-exhaustive structs could have additional fields added in future. \
-                       Therefore, non-exhaustive structs cannot be constructed in external crates \
-                       using the traditional <code>Struct {{ .. }}</code> syntax; cannot be \
-                       matched against without a wildcard <code>..</code>; and \
-                       struct update syntax will not work."
-            );
-        } else if item.is_enum() {
-            write!(
-                w,
-                "Non-exhaustive enums could have additional variants added in future. \
-                       Therefore, when matching against variants of non-exhaustive enums, an \
-                       extra wildcard arm must be added to account for any future variants."
-            );
-        } else if item.is_variant() {
-            write!(
-                w,
-                "Non-exhaustive enum variants could have additional fields added in future. \
-                       Therefore, non-exhaustive enum variants cannot be constructed in external \
-                       crates and cannot be matched against."
-            );
-        } else {
-            write!(
-                w,
-                "This type will require a wildcard arm in any match statements or \
-                       constructors."
-            );
-        }
-
-        write!(w, "</div>");
-    }
-}
-
-fn name_key(name: &str) -> (&str, u64, usize) {
-    let end = name.bytes().rposition(|b| b.is_ascii_digit()).map_or(name.len(), |i| i + 1);
-
-    // find number at end
-    let split = name[0..end].bytes().rposition(|b| !b.is_ascii_digit()).map_or(0, |i| i + 1);
-
-    // count leading zeroes
-    let after_zeroes =
-        name[split..end].bytes().position(|b| b != b'0').map_or(name.len(), |extra| split + extra);
-
-    // sort leading zeroes last
-    let num_zeroes = after_zeroes - split;
-
-    match name[split..end].parse() {
-        Ok(n) => (&name[..split], n, num_zeroes),
-        Err(_) => (name, 0, num_zeroes),
-    }
-}
-
-fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean::Item]) {
-    document(w, cx, item);
-
-    let mut indices = (0..items.len()).filter(|i| !items[*i].is_stripped()).collect::<Vec<usize>>();
-
-    // the order of item types in the listing
-    fn reorder(ty: ItemType) -> u8 {
-        match ty {
-            ItemType::ExternCrate => 0,
-            ItemType::Import => 1,
-            ItemType::Primitive => 2,
-            ItemType::Module => 3,
-            ItemType::Macro => 4,
-            ItemType::Struct => 5,
-            ItemType::Enum => 6,
-            ItemType::Constant => 7,
-            ItemType::Static => 8,
-            ItemType::Trait => 9,
-            ItemType::Function => 10,
-            ItemType::Typedef => 12,
-            ItemType::Union => 13,
-            _ => 14 + ty as u8,
-        }
-    }
-
-    fn cmp(i1: &clean::Item, i2: &clean::Item, idx1: usize, idx2: usize) -> Ordering {
-        let ty1 = i1.type_();
-        let ty2 = i2.type_();
-        if ty1 != ty2 {
-            return (reorder(ty1), idx1).cmp(&(reorder(ty2), idx2));
-        }
-        let s1 = i1.stability.as_ref().map(|s| s.level);
-        let s2 = i2.stability.as_ref().map(|s| s.level);
-        match (s1, s2) {
-            (Some(stability::Unstable), Some(stability::Stable)) => return Ordering::Greater,
-            (Some(stability::Stable), Some(stability::Unstable)) => return Ordering::Less,
-            _ => {}
-        }
-        let lhs = i1.name.as_ref().map_or("", |s| &**s);
-        let rhs = i2.name.as_ref().map_or("", |s| &**s);
-        name_key(lhs).cmp(&name_key(rhs))
-    }
-
-    if cx.shared.sort_modules_alphabetically {
-        indices.sort_by(|&i1, &i2| cmp(&items[i1], &items[i2], i1, i2));
-    }
-    // This call is to remove re-export duplicates in cases such as:
-    //
-    // ```
-    // pub mod foo {
-    //     pub mod bar {
-    //         pub trait Double { fn foo(); }
-    //     }
-    // }
-    //
-    // pub use foo::bar::*;
-    // pub use foo::*;
-    // ```
-    //
-    // `Double` will appear twice in the generated docs.
-    //
-    // FIXME: This code is quite ugly and could be improved. Small issue: DefId
-    // can be identical even if the elements are different (mostly in imports).
-    // So in case this is an import, we keep everything by adding a "unique id"
-    // (which is the position in the vector).
-    indices.dedup_by_key(|i| {
-        (
-            items[*i].def_id,
-            if items[*i].name.as_ref().is_some() { Some(full_path(cx, &items[*i])) } else { None },
-            items[*i].type_(),
-            if items[*i].is_import() { *i } else { 0 },
-        )
-    });
-
-    debug!("{:?}", indices);
-    let mut curty = None;
-    for &idx in &indices {
-        let myitem = &items[idx];
-        if myitem.is_stripped() {
-            continue;
-        }
-
-        let myty = Some(myitem.type_());
-        if curty == Some(ItemType::ExternCrate) && myty == Some(ItemType::Import) {
-            // Put `extern crate` and `use` re-exports in the same section.
-            curty = myty;
-        } else if myty != curty {
-            if curty.is_some() {
-                write!(w, "</table>");
-            }
-            curty = myty;
-            let (short, name) = item_ty_to_strs(&myty.unwrap());
-            write!(
-                w,
-                "<h2 id='{id}' class='section-header'>\
-                       <a href=\"#{id}\">{name}</a></h2>\n<table>",
-                id = cx.derive_id(short.to_owned()),
-                name = name
-            );
-        }
-
-        match myitem.inner {
-            clean::ExternCrateItem(ref name, ref src) => {
-                use crate::html::format::anchor;
-
-                match *src {
-                    Some(ref src) => write!(
-                        w,
-                        "<tr><td><code>{}extern crate {} as {};",
-                        myitem.visibility.print_with_space(),
-                        anchor(myitem.def_id, src),
-                        name
-                    ),
-                    None => write!(
-                        w,
-                        "<tr><td><code>{}extern crate {};",
-                        myitem.visibility.print_with_space(),
-                        anchor(myitem.def_id, name)
-                    ),
-                }
-                write!(w, "</code></td></tr>");
-            }
-
-            clean::ImportItem(ref import) => {
-                write!(
-                    w,
-                    "<tr><td><code>{}{}</code></td></tr>",
-                    myitem.visibility.print_with_space(),
-                    import.print()
-                );
-            }
-
-            _ => {
-                if myitem.name.is_none() {
-                    continue;
-                }
-
-                let unsafety_flag = match myitem.inner {
-                    clean::FunctionItem(ref func) | clean::ForeignFunctionItem(ref func)
-                        if func.header.unsafety == hir::Unsafety::Unsafe =>
-                    {
-                        "<a title='unsafe function' href='#'><sup>⚠</sup></a>"
-                    }
-                    _ => "",
-                };
-
-                let stab = myitem.stability_class();
-                let add = if stab.is_some() { " " } else { "" };
-
-                let doc_value = myitem.doc_value().unwrap_or("");
-                write!(
-                    w,
-                    "\
-                       <tr class='{stab}{add}module-item'>\
-                           <td><a class=\"{class}\" href=\"{href}\" \
-                                  title='{title}'>{name}</a>{unsafety_flag}</td>\
-                           <td class='docblock-short'>{stab_tags}{docs}</td>\
-                       </tr>",
-                    name = *myitem.name.as_ref().unwrap(),
-                    stab_tags = stability_tags(myitem),
-                    docs = MarkdownSummaryLine(doc_value, &myitem.links()).into_string(),
-                    class = myitem.type_(),
-                    add = add,
-                    stab = stab.unwrap_or_else(String::new),
-                    unsafety_flag = unsafety_flag,
-                    href = item_path(myitem.type_(), myitem.name.as_ref().unwrap()),
-                    title = [full_path(cx, myitem), myitem.type_().to_string()]
-                        .iter()
-                        .filter_map(|s| if !s.is_empty() { Some(s.as_str()) } else { None })
-                        .collect::<Vec<_>>()
-                        .join(" "),
-                );
-            }
-        }
-    }
-
-    if curty.is_some() {
-        write!(w, "</table>");
-    }
-}
-
-/// Render the stability and deprecation tags that are displayed in the item's summary at the
-/// module level.
-fn stability_tags(item: &clean::Item) -> String {
-    let mut tags = String::new();
-
-    fn tag_html(class: &str, contents: &str) -> String {
-        format!(r#"<span class="stab {}">{}</span>"#, class, contents)
-    }
-
-    // The trailing space after each tag is to space it properly against the rest of the docs.
-    if let Some(depr) = &item.deprecation {
-        let mut message = "Deprecated";
-        if !stability::deprecation_in_effect(depr.is_since_rustc_version, depr.since.as_deref()) {
-            message = "Deprecation planned";
-        }
-        tags += &tag_html("deprecated", message);
-    }
-
-    // The "rustc_private" crates are permanently unstable so it makes no sense
-    // to render "unstable" everywhere.
-    if item
-        .stability
-        .as_ref()
-        .map(|s| s.level == stability::Unstable && s.feature.as_deref() != Some("rustc_private"))
-        == Some(true)
-    {
-        tags += &tag_html("unstable", "Experimental");
-    }
-
-    if let Some(ref cfg) = item.attrs.cfg {
-        tags += &tag_html("portability", &cfg.render_short_html());
-    }
-
-    tags
-}
-
-/// Render the stability and/or deprecation warning that is displayed at the top of the item's
-/// documentation.
-fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
-    let mut stability = vec![];
-    let error_codes = cx.shared.codes;
-
-    if let Some(Deprecation { ref note, ref since, is_since_rustc_version }) = item.deprecation {
-        // We display deprecation messages for #[deprecated] and #[rustc_deprecated]
-        // but only display the future-deprecation messages for #[rustc_deprecated].
-        let mut message = if let Some(since) = since {
-            if !stability::deprecation_in_effect(is_since_rustc_version, Some(since)) {
-                format!("Deprecating in {}", Escape(&since))
-            } else {
-                format!("Deprecated since {}", Escape(&since))
-            }
-        } else {
-            String::from("Deprecated")
-        };
-
-        if let Some(note) = note {
-            let mut ids = cx.id_map.borrow_mut();
-            let html = MarkdownHtml(
-                &note,
-                &mut ids,
-                error_codes,
-                cx.shared.edition,
-                &cx.shared.playground,
-            );
-            message.push_str(&format!(": {}", html.into_string()));
-        }
-        stability.push(format!(
-            "<div class='stab deprecated'><span class='emoji'>👎</span> {}</div>",
-            message,
-        ));
-    }
-
-    // Render unstable items. But don't render "rustc_private" crates (internal compiler crates).
-    // Those crates are permanently unstable so it makes no sense to render "unstable" everywhere.
-    if let Some(stab) = item.stability.as_ref().filter(|stab| {
-        stab.level == stability::Unstable && stab.feature.as_deref() != Some("rustc_private")
-    }) {
-        let mut message =
-            "<span class='emoji'>🔬</span> This is a nightly-only experimental API.".to_owned();
-
-        if let Some(feature) = stab.feature.as_deref() {
-            let mut feature = format!("<code>{}</code>", Escape(&feature));
-            if let (Some(url), Some(issue)) = (&cx.shared.issue_tracker_base_url, stab.issue) {
-                feature.push_str(&format!(
-                    "&nbsp;<a href=\"{url}{issue}\">#{issue}</a>",
-                    url = url,
-                    issue = issue
-                ));
-            }
-
-            message.push_str(&format!(" ({})", feature));
-        }
-
-        if let Some(unstable_reason) = &stab.unstable_reason {
-            let mut ids = cx.id_map.borrow_mut();
-            message = format!(
-                "<details><summary>{}</summary>{}</details>",
-                message,
-                MarkdownHtml(
-                    &unstable_reason,
-                    &mut ids,
-                    error_codes,
-                    cx.shared.edition,
-                    &cx.shared.playground,
-                )
-                .into_string()
-            );
-        }
-
-        stability.push(format!("<div class='stab unstable'>{}</div>", message));
-    }
-
-    if let Some(ref cfg) = item.attrs.cfg {
-        stability.push(format!("<div class='stab portability'>{}</div>", cfg.render_long_html()));
-    }
-
-    stability
-}
-
-fn item_constant(w: &mut Buffer, cx: &Context, it: &clean::Item, c: &clean::Constant) {
-    write!(w, "<pre class='rust const'>");
-    render_attributes(w, it, false);
-
-    write!(
-        w,
-        "{vis}const \
-               {name}: {typ}",
-        vis = it.visibility.print_with_space(),
-        name = it.name.as_ref().unwrap(),
-        typ = c.type_.print(),
-    );
-
-    if c.value.is_some() || c.is_literal {
-        write!(w, " = {expr};", expr = Escape(&c.expr));
-    } else {
-        write!(w, ";");
-    }
-
-    if let Some(value) = &c.value {
-        if !c.is_literal {
-            let value_lowercase = value.to_lowercase();
-            let expr_lowercase = c.expr.to_lowercase();
-
-            if value_lowercase != expr_lowercase
-                && value_lowercase.trim_end_matches("i32") != expr_lowercase
-            {
-                write!(w, " // {value}", value = Escape(value));
-            }
-        }
-    }
-
-    write!(w, "</pre>");
-    document(w, cx, it)
-}
-
-fn item_static(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Static) {
-    write!(w, "<pre class='rust static'>");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "{vis}static {mutability}\
-               {name}: {typ}</pre>",
-        vis = it.visibility.print_with_space(),
-        mutability = s.mutability.print_with_space(),
-        name = it.name.as_ref().unwrap(),
-        typ = s.type_.print()
-    );
-    document(w, cx, it)
-}
-
-fn item_function(w: &mut Buffer, cx: &Context, it: &clean::Item, f: &clean::Function) {
-    let header_len = format!(
-        "{}{}{}{}{:#}fn {}{:#}",
-        it.visibility.print_with_space(),
-        f.header.constness.print_with_space(),
-        f.header.asyncness.print_with_space(),
-        f.header.unsafety.print_with_space(),
-        print_abi_with_space(f.header.abi),
-        it.name.as_ref().unwrap(),
-        f.generics.print()
-    )
-    .len();
-    write!(w, "<pre class='rust fn'>");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "{vis}{constness}{asyncness}{unsafety}{abi}fn \
-           {name}{generics}{decl}{spotlight}{where_clause}</pre>",
-        vis = it.visibility.print_with_space(),
-        constness = f.header.constness.print_with_space(),
-        asyncness = f.header.asyncness.print_with_space(),
-        unsafety = f.header.unsafety.print_with_space(),
-        abi = print_abi_with_space(f.header.abi),
-        name = it.name.as_ref().unwrap(),
-        generics = f.generics.print(),
-        where_clause = WhereClause { gens: &f.generics, indent: 0, end_newline: true },
-        decl = Function { decl: &f.decl, header_len, indent: 0, asyncness: f.header.asyncness }
-            .print(),
-        spotlight = spotlight_decl(&f.decl),
-    );
-    document(w, cx, it)
-}
-
-fn render_implementor(
-    cx: &Context,
-    implementor: &Impl,
-    w: &mut Buffer,
-    implementor_dups: &FxHashMap<&str, (DefId, bool)>,
-    aliases: &[String],
-) {
-    // If there's already another implementor that has the same abbridged name, use the
-    // full path, for example in `std::iter::ExactSizeIterator`
-    let use_absolute = match implementor.inner_impl().for_ {
-        clean::ResolvedPath { ref path, is_generic: false, .. }
-        | clean::BorrowedRef {
-            type_: box clean::ResolvedPath { ref path, is_generic: false, .. },
-            ..
-        } => implementor_dups[path.last_name()].1,
-        _ => false,
-    };
-    render_impl(
-        w,
-        cx,
-        implementor,
-        AssocItemLink::Anchor(None),
-        RenderMode::Normal,
-        implementor.impl_item.stable_since(),
-        false,
-        Some(use_absolute),
-        false,
-        false,
-        aliases,
-    );
-}
-
-fn render_impls(cx: &Context, w: &mut Buffer, traits: &[&&Impl], containing_item: &clean::Item) {
-    let mut impls = traits
-        .iter()
-        .map(|i| {
-            let did = i.trait_did().unwrap();
-            let assoc_link = AssocItemLink::GotoSource(did, &i.inner_impl().provided_trait_methods);
-            let mut buffer = if w.is_for_html() { Buffer::html() } else { Buffer::new() };
-            render_impl(
-                &mut buffer,
-                cx,
-                i,
-                assoc_link,
-                RenderMode::Normal,
-                containing_item.stable_since(),
-                true,
-                None,
-                false,
-                true,
-                &[],
-            );
-            buffer.into_inner()
-        })
-        .collect::<Vec<_>>();
-    impls.sort();
-    w.write_str(&impls.join(""));
-}
-
-fn bounds(t_bounds: &[clean::GenericBound], trait_alias: bool) -> String {
-    let mut bounds = String::new();
-    if !t_bounds.is_empty() {
-        if !trait_alias {
-            bounds.push_str(": ");
-        }
-        for (i, p) in t_bounds.iter().enumerate() {
-            if i > 0 {
-                bounds.push_str(" + ");
-            }
-            bounds.push_str(&p.print().to_string());
-        }
-    }
-    bounds
-}
-
-fn compare_impl<'a, 'b>(lhs: &'a &&Impl, rhs: &'b &&Impl) -> Ordering {
-    let lhs = format!("{}", lhs.inner_impl().print());
-    let rhs = format!("{}", rhs.inner_impl().print());
-
-    // lhs and rhs are formatted as HTML, which may be unnecessary
-    name_key(&lhs).cmp(&name_key(&rhs))
-}
-
-fn item_trait(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Trait) {
-    let bounds = bounds(&t.bounds, false);
-    let types = t.items.iter().filter(|m| m.is_associated_type()).collect::<Vec<_>>();
-    let consts = t.items.iter().filter(|m| m.is_associated_const()).collect::<Vec<_>>();
-    let required = t.items.iter().filter(|m| m.is_ty_method()).collect::<Vec<_>>();
-    let provided = t.items.iter().filter(|m| m.is_method()).collect::<Vec<_>>();
-
-    // Output the trait definition
-    wrap_into_docblock(w, |w| {
-        write!(w, "<pre class='rust trait'>");
-        render_attributes(w, it, true);
-        write!(
-            w,
-            "{}{}{}trait {}{}{}",
-            it.visibility.print_with_space(),
-            t.unsafety.print_with_space(),
-            if t.is_auto { "auto " } else { "" },
-            it.name.as_ref().unwrap(),
-            t.generics.print(),
-            bounds
-        );
-
-        if !t.generics.where_predicates.is_empty() {
-            write!(w, "{}", WhereClause { gens: &t.generics, indent: 0, end_newline: true });
-        } else {
-            write!(w, " ");
-        }
-
-        if t.items.is_empty() {
-            write!(w, "{{ }}");
-        } else {
-            // FIXME: we should be using a derived_id for the Anchors here
-            write!(w, "{{\n");
-            for t in &types {
-                render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait);
-                write!(w, ";\n");
-            }
-            if !types.is_empty() && !consts.is_empty() {
-                w.write_str("\n");
-            }
-            for t in &consts {
-                render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait);
-                write!(w, ";\n");
-            }
-            if !consts.is_empty() && !required.is_empty() {
-                w.write_str("\n");
-            }
-            for (pos, m) in required.iter().enumerate() {
-                render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait);
-                write!(w, ";\n");
-
-                if pos < required.len() - 1 {
-                    write!(w, "<div class='item-spacer'></div>");
-                }
-            }
-            if !required.is_empty() && !provided.is_empty() {
-                w.write_str("\n");
-            }
-            for (pos, m) in provided.iter().enumerate() {
-                render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait);
-                match m.inner {
-                    clean::MethodItem(ref inner) if !inner.generics.where_predicates.is_empty() => {
-                        write!(w, ",\n    {{ ... }}\n");
-                    }
-                    _ => {
-                        write!(w, " {{ ... }}\n");
-                    }
-                }
-                if pos < provided.len() - 1 {
-                    write!(w, "<div class='item-spacer'></div>");
-                }
-            }
-            write!(w, "}}");
-        }
-        write!(w, "</pre>")
-    });
-
-    // Trait documentation
-    document(w, cx, it);
-
-    fn write_small_section_header(w: &mut Buffer, id: &str, title: &str, extra_content: &str) {
-        write!(
-            w,
-            "
-            <h2 id='{0}' class='small-section-header'>\
-              {1}<a href='#{0}' class='anchor'></a>\
-            </h2>{2}",
-            id, title, extra_content
-        )
-    }
-
-    fn write_loading_content(w: &mut Buffer, extra_content: &str) {
-        write!(w, "{}<span class='loading-content'>Loading content...</span>", extra_content)
-    }
-
-    fn trait_item(w: &mut Buffer, cx: &Context, m: &clean::Item, t: &clean::Item) {
-        let name = m.name.as_ref().unwrap();
-        let item_type = m.type_();
-        let id = cx.derive_id(format!("{}.{}", item_type, name));
-        write!(w, "<h3 id='{id}' class='method'><code>", id = id,);
-        render_assoc_item(w, m, AssocItemLink::Anchor(Some(&id)), ItemType::Impl);
-        write!(w, "</code>");
-        render_stability_since(w, m, t);
-        write!(w, "</h3>");
-        document(w, cx, m);
-    }
-
-    if !types.is_empty() {
-        write_small_section_header(
-            w,
-            "associated-types",
-            "Associated Types",
-            "<div class='methods'>",
-        );
-        for t in &types {
-            trait_item(w, cx, *t, it);
-        }
-        write_loading_content(w, "</div>");
-    }
-
-    if !consts.is_empty() {
-        write_small_section_header(
-            w,
-            "associated-const",
-            "Associated Constants",
-            "<div class='methods'>",
-        );
-        for t in &consts {
-            trait_item(w, cx, *t, it);
-        }
-        write_loading_content(w, "</div>");
-    }
-
-    // Output the documentation for each function individually
-    if !required.is_empty() {
-        write_small_section_header(
-            w,
-            "required-methods",
-            "Required methods",
-            "<div class='methods'>",
-        );
-        for m in &required {
-            trait_item(w, cx, *m, it);
-        }
-        write_loading_content(w, "</div>");
-    }
-    if !provided.is_empty() {
-        write_small_section_header(
-            w,
-            "provided-methods",
-            "Provided methods",
-            "<div class='methods'>",
-        );
-        for m in &provided {
-            trait_item(w, cx, *m, it);
-        }
-        write_loading_content(w, "</div>");
-    }
-
-    // If there are methods directly on this trait object, render them here.
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All);
-
-    if let Some(implementors) = cx.cache.implementors.get(&it.def_id) {
-        // The DefId is for the first Type found with that name. The bool is
-        // if any Types with the same name but different DefId have been found.
-        let mut implementor_dups: FxHashMap<&str, (DefId, bool)> = FxHashMap::default();
-        for implementor in implementors {
-            match implementor.inner_impl().for_ {
-                clean::ResolvedPath { ref path, did, is_generic: false, .. }
-                | clean::BorrowedRef {
-                    type_: box clean::ResolvedPath { ref path, did, is_generic: false, .. },
-                    ..
-                } => {
-                    let &mut (prev_did, ref mut has_duplicates) =
-                        implementor_dups.entry(path.last_name()).or_insert((did, false));
-                    if prev_did != did {
-                        *has_duplicates = true;
-                    }
-                }
-                _ => {}
-            }
-        }
-
-        let (local, foreign) = implementors.iter().partition::<Vec<_>, _>(|i| {
-            i.inner_impl().for_.def_id().map_or(true, |d| cx.cache.paths.contains_key(&d))
-        });
-
-        let (mut synthetic, mut concrete): (Vec<&&Impl>, Vec<&&Impl>) =
-            local.iter().partition(|i| i.inner_impl().synthetic);
-
-        synthetic.sort_by(compare_impl);
-        concrete.sort_by(compare_impl);
-
-        if !foreign.is_empty() {
-            write_small_section_header(w, "foreign-impls", "Implementations on Foreign Types", "");
-
-            for implementor in foreign {
-                let assoc_link = AssocItemLink::GotoSource(
-                    implementor.impl_item.def_id,
-                    &implementor.inner_impl().provided_trait_methods,
-                );
-                render_impl(
-                    w,
-                    cx,
-                    &implementor,
-                    assoc_link,
-                    RenderMode::Normal,
-                    implementor.impl_item.stable_since(),
-                    false,
-                    None,
-                    true,
-                    false,
-                    &[],
-                );
-            }
-            write_loading_content(w, "");
-        }
-
-        write_small_section_header(
-            w,
-            "implementors",
-            "Implementors",
-            "<div class='item-list' id='implementors-list'>",
-        );
-        for implementor in concrete {
-            render_implementor(cx, implementor, w, &implementor_dups, &[]);
-        }
-        write_loading_content(w, "</div>");
-
-        if t.auto {
-            write_small_section_header(
-                w,
-                "synthetic-implementors",
-                "Auto implementors",
-                "<div class='item-list' id='synthetic-implementors-list'>",
-            );
-            for implementor in synthetic {
-                render_implementor(
-                    cx,
-                    implementor,
-                    w,
-                    &implementor_dups,
-                    &collect_paths_for_type(implementor.inner_impl().for_.clone()),
-                );
-            }
-            write_loading_content(w, "</div>");
-        }
-    } else {
-        // even without any implementations to write in, we still want the heading and list, so the
-        // implementors javascript file pulled in below has somewhere to write the impls into
-        write_small_section_header(
-            w,
-            "implementors",
-            "Implementors",
-            "<div class='item-list' id='implementors-list'>",
-        );
-        write_loading_content(w, "</div>");
-
-        if t.auto {
-            write_small_section_header(
-                w,
-                "synthetic-implementors",
-                "Auto implementors",
-                "<div class='item-list' id='synthetic-implementors-list'>",
-            );
-            write_loading_content(w, "</div>");
-        }
-    }
-
-    write!(
-        w,
-        "<script type=\"text/javascript\" \
-                 src=\"{root_path}/implementors/{path}/{ty}.{name}.js\" async>\
-         </script>",
-        root_path = vec![".."; cx.current.len()].join("/"),
-        path = if it.def_id.is_local() {
-            cx.current.join("/")
-        } else {
-            let (ref path, _) = cx.cache.external_paths[&it.def_id];
-            path[..path.len() - 1].join("/")
-        },
-        ty = it.type_(),
-        name = *it.name.as_ref().unwrap()
-    );
-}
-
-fn naive_assoc_href(it: &clean::Item, link: AssocItemLink<'_>) -> String {
-    use crate::html::item_type::ItemType::*;
-
-    let name = it.name.as_ref().unwrap();
-    let ty = match it.type_() {
-        Typedef | AssocType => AssocType,
-        s => s,
-    };
-
-    let anchor = format!("#{}.{}", ty, name);
-    match link {
-        AssocItemLink::Anchor(Some(ref id)) => format!("#{}", id),
-        AssocItemLink::Anchor(None) => anchor,
-        AssocItemLink::GotoSource(did, _) => {
-            href(did).map(|p| format!("{}{}", p.0, anchor)).unwrap_or(anchor)
-        }
-    }
-}
-
-fn assoc_const(
-    w: &mut Buffer,
-    it: &clean::Item,
-    ty: &clean::Type,
-    _default: Option<&String>,
-    link: AssocItemLink<'_>,
-    extra: &str,
-) {
-    write!(
-        w,
-        "{}{}const <a href='{}' class=\"constant\"><b>{}</b></a>: {}",
-        extra,
-        it.visibility.print_with_space(),
-        naive_assoc_href(it, link),
-        it.name.as_ref().unwrap(),
-        ty.print()
-    );
-}
-
-fn assoc_type(
-    w: &mut Buffer,
-    it: &clean::Item,
-    bounds: &[clean::GenericBound],
-    default: Option<&clean::Type>,
-    link: AssocItemLink<'_>,
-    extra: &str,
-) {
-    write!(
-        w,
-        "{}type <a href='{}' class=\"type\">{}</a>",
-        extra,
-        naive_assoc_href(it, link),
-        it.name.as_ref().unwrap()
-    );
-    if !bounds.is_empty() {
-        write!(w, ": {}", print_generic_bounds(bounds))
-    }
-    if let Some(default) = default {
-        write!(w, " = {}", default.print())
-    }
-}
-
-fn render_stability_since_raw(w: &mut Buffer, ver: Option<&str>, containing_ver: Option<&str>) {
-    if let Some(v) = ver {
-        if containing_ver != ver && !v.is_empty() {
-            write!(w, "<span class='since' title='Stable since Rust version {0}'>{0}</span>", v)
-        }
-    }
-}
-
-fn render_stability_since(w: &mut Buffer, item: &clean::Item, containing_item: &clean::Item) {
-    render_stability_since_raw(w, item.stable_since(), containing_item.stable_since())
-}
-
-fn render_assoc_item(
-    w: &mut Buffer,
-    item: &clean::Item,
-    link: AssocItemLink<'_>,
-    parent: ItemType,
-) {
-    fn method(
-        w: &mut Buffer,
-        meth: &clean::Item,
-        header: hir::FnHeader,
-        g: &clean::Generics,
-        d: &clean::FnDecl,
-        link: AssocItemLink<'_>,
-        parent: ItemType,
-    ) {
-        let name = meth.name.as_ref().unwrap();
-        let anchor = format!("#{}.{}", meth.type_(), name);
-        let href = match link {
-            AssocItemLink::Anchor(Some(ref id)) => format!("#{}", id),
-            AssocItemLink::Anchor(None) => anchor,
-            AssocItemLink::GotoSource(did, provided_methods) => {
-                // We're creating a link from an impl-item to the corresponding
-                // trait-item and need to map the anchored type accordingly.
-                let ty = if provided_methods.contains(name) {
-                    ItemType::Method
-                } else {
-                    ItemType::TyMethod
-                };
-
-                href(did).map(|p| format!("{}#{}.{}", p.0, ty, name)).unwrap_or(anchor)
-            }
-        };
-        let mut header_len = format!(
-            "{}{}{}{}{}{:#}fn {}{:#}",
-            meth.visibility.print_with_space(),
-            header.constness.print_with_space(),
-            header.asyncness.print_with_space(),
-            header.unsafety.print_with_space(),
-            print_default_space(meth.is_default()),
-            print_abi_with_space(header.abi),
-            name,
-            g.print()
-        )
-        .len();
-        let (indent, end_newline) = if parent == ItemType::Trait {
-            header_len += 4;
-            (4, false)
-        } else {
-            (0, true)
-        };
-        render_attributes(w, meth, false);
-        write!(
-            w,
-            "{}{}{}{}{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
-                   {generics}{decl}{spotlight}{where_clause}",
-            if parent == ItemType::Trait { "    " } else { "" },
-            meth.visibility.print_with_space(),
-            header.constness.print_with_space(),
-            header.asyncness.print_with_space(),
-            header.unsafety.print_with_space(),
-            print_default_space(meth.is_default()),
-            print_abi_with_space(header.abi),
-            href = href,
-            name = name,
-            generics = g.print(),
-            decl = Function { decl: d, header_len, indent, asyncness: header.asyncness }.print(),
-            spotlight = spotlight_decl(&d),
-            where_clause = WhereClause { gens: g, indent, end_newline }
-        )
-    }
-    match item.inner {
-        clean::StrippedItem(..) => {}
-        clean::TyMethodItem(ref m) => method(w, item, m.header, &m.generics, &m.decl, link, parent),
-        clean::MethodItem(ref m) => method(w, item, m.header, &m.generics, &m.decl, link, parent),
-        clean::AssocConstItem(ref ty, ref default) => assoc_const(
-            w,
-            item,
-            ty,
-            default.as_ref(),
-            link,
-            if parent == ItemType::Trait { "    " } else { "" },
-        ),
-        clean::AssocTypeItem(ref bounds, ref default) => assoc_type(
-            w,
-            item,
-            bounds,
-            default.as_ref(),
-            link,
-            if parent == ItemType::Trait { "    " } else { "" },
-        ),
-        _ => panic!("render_assoc_item called on non-associated-item"),
-    }
-}
-
-fn item_struct(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Struct) {
-    wrap_into_docblock(w, |w| {
-        write!(w, "<pre class='rust struct'>");
-        render_attributes(w, it, true);
-        render_struct(w, it, Some(&s.generics), s.struct_type, &s.fields, "", true);
-        write!(w, "</pre>")
-    });
-
-    document(w, cx, it);
-    let mut fields = s
-        .fields
-        .iter()
-        .filter_map(|f| match f.inner {
-            clean::StructFieldItem(ref ty) => Some((f, ty)),
-            _ => None,
-        })
-        .peekable();
-    if let doctree::Plain = s.struct_type {
-        if fields.peek().is_some() {
-            write!(
-                w,
-                "<h2 id='fields' class='fields small-section-header'>
-                       Fields{}<a href='#fields' class='anchor'></a></h2>",
-                document_non_exhaustive_header(it)
-            );
-            document_non_exhaustive(w, it);
-            for (field, ty) in fields {
-                let id = cx.derive_id(format!(
-                    "{}.{}",
-                    ItemType::StructField,
-                    field.name.as_ref().unwrap()
-                ));
-                write!(
-                    w,
-                    "<span id=\"{id}\" class=\"{item_type} small-section-header\">\
-                           <a href=\"#{id}\" class=\"anchor field\"></a>\
-                           <code>{name}: {ty}</code>\
-                           </span>",
-                    item_type = ItemType::StructField,
-                    id = id,
-                    name = field.name.as_ref().unwrap(),
-                    ty = ty.print()
-                );
-                document(w, cx, field);
-            }
-        }
-    }
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_union(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Union) {
-    wrap_into_docblock(w, |w| {
-        write!(w, "<pre class='rust union'>");
-        render_attributes(w, it, true);
-        render_union(w, it, Some(&s.generics), &s.fields, "", true);
-        write!(w, "</pre>")
-    });
-
-    document(w, cx, it);
-    let mut fields = s
-        .fields
-        .iter()
-        .filter_map(|f| match f.inner {
-            clean::StructFieldItem(ref ty) => Some((f, ty)),
-            _ => None,
-        })
-        .peekable();
-    if fields.peek().is_some() {
-        write!(
-            w,
-            "<h2 id='fields' class='fields small-section-header'>
-                   Fields<a href='#fields' class='anchor'></a></h2>"
-        );
-        for (field, ty) in fields {
-            let name = field.name.as_ref().expect("union field name");
-            let id = format!("{}.{}", ItemType::StructField, name);
-            write!(
-                w,
-                "<span id=\"{id}\" class=\"{shortty} small-section-header\">\
-                           <a href=\"#{id}\" class=\"anchor field\"></a>\
-                           <code>{name}: {ty}</code>\
-                       </span>",
-                id = id,
-                name = name,
-                shortty = ItemType::StructField,
-                ty = ty.print()
-            );
-            if let Some(stability_class) = field.stability_class() {
-                write!(w, "<span class='stab {stab}'></span>", stab = stability_class);
-            }
-            document(w, cx, field);
-        }
-    }
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_enum(w: &mut Buffer, cx: &Context, it: &clean::Item, e: &clean::Enum) {
-    wrap_into_docblock(w, |w| {
-        write!(w, "<pre class='rust enum'>");
-        render_attributes(w, it, true);
-        write!(
-            w,
-            "{}enum {}{}{}",
-            it.visibility.print_with_space(),
-            it.name.as_ref().unwrap(),
-            e.generics.print(),
-            WhereClause { gens: &e.generics, indent: 0, end_newline: true }
-        );
-        if e.variants.is_empty() && !e.variants_stripped {
-            write!(w, " {{}}");
-        } else {
-            write!(w, " {{\n");
-            for v in &e.variants {
-                write!(w, "    ");
-                let name = v.name.as_ref().unwrap();
-                match v.inner {
-                    clean::VariantItem(ref var) => match var.kind {
-                        clean::VariantKind::CLike => write!(w, "{}", name),
-                        clean::VariantKind::Tuple(ref tys) => {
-                            write!(w, "{}(", name);
-                            for (i, ty) in tys.iter().enumerate() {
-                                if i > 0 {
-                                    write!(w, ",&nbsp;")
-                                }
-                                write!(w, "{}", ty.print());
-                            }
-                            write!(w, ")");
-                        }
-                        clean::VariantKind::Struct(ref s) => {
-                            render_struct(w, v, None, s.struct_type, &s.fields, "    ", false);
-                        }
-                    },
-                    _ => unreachable!(),
-                }
-                write!(w, ",\n");
-            }
-
-            if e.variants_stripped {
-                write!(w, "    // some variants omitted\n");
-            }
-            write!(w, "}}");
-        }
-        write!(w, "</pre>")
-    });
-
-    document(w, cx, it);
-    if !e.variants.is_empty() {
-        write!(
-            w,
-            "<h2 id='variants' class='variants small-section-header'>
-                   Variants{}<a href='#variants' class='anchor'></a></h2>\n",
-            document_non_exhaustive_header(it)
-        );
-        document_non_exhaustive(w, it);
-        for variant in &e.variants {
-            let id =
-                cx.derive_id(format!("{}.{}", ItemType::Variant, variant.name.as_ref().unwrap()));
-            write!(
-                w,
-                "<div id=\"{id}\" class=\"variant small-section-header\">\
-                    <a href=\"#{id}\" class=\"anchor field\"></a>\
-                    <code>{name}",
-                id = id,
-                name = variant.name.as_ref().unwrap()
-            );
-            if let clean::VariantItem(ref var) = variant.inner {
-                if let clean::VariantKind::Tuple(ref tys) = var.kind {
-                    write!(w, "(");
-                    for (i, ty) in tys.iter().enumerate() {
-                        if i > 0 {
-                            write!(w, ",&nbsp;");
-                        }
-                        write!(w, "{}", ty.print());
-                    }
-                    write!(w, ")");
-                }
-            }
-            write!(w, "</code></div>");
-            document(w, cx, variant);
-            document_non_exhaustive(w, variant);
-
-            use crate::clean::{Variant, VariantKind};
-            if let clean::VariantItem(Variant { kind: VariantKind::Struct(ref s) }) = variant.inner
-            {
-                let variant_id = cx.derive_id(format!(
-                    "{}.{}.fields",
-                    ItemType::Variant,
-                    variant.name.as_ref().unwrap()
-                ));
-                write!(w, "<div class='autohide sub-variant' id='{id}'>", id = variant_id);
-                write!(
-                    w,
-                    "<h3>Fields of <b>{name}</b></h3><div>",
-                    name = variant.name.as_ref().unwrap()
-                );
-                for field in &s.fields {
-                    use crate::clean::StructFieldItem;
-                    if let StructFieldItem(ref ty) = field.inner {
-                        let id = cx.derive_id(format!(
-                            "variant.{}.field.{}",
-                            variant.name.as_ref().unwrap(),
-                            field.name.as_ref().unwrap()
-                        ));
-                        write!(
-                            w,
-                            "<span id=\"{id}\" class=\"variant small-section-header\">\
-                                   <a href=\"#{id}\" class=\"anchor field\"></a>\
-                                   <code>{f}:&nbsp;{t}\
-                                   </code></span>",
-                            id = id,
-                            f = field.name.as_ref().unwrap(),
-                            t = ty.print()
-                        );
-                        document(w, cx, field);
-                    }
-                }
-                write!(w, "</div></div>");
-            }
-            render_stability_since(w, variant, it);
-        }
-    }
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-const ALLOWED_ATTRIBUTES: &[Symbol] = &[
-    sym::export_name,
-    sym::lang,
-    sym::link_section,
-    sym::must_use,
-    sym::no_mangle,
-    sym::repr,
-    sym::non_exhaustive,
-];
-
-// The `top` parameter is used when generating the item declaration to ensure it doesn't have a
-// left padding. For example:
-//
-// #[foo] <----- "top" attribute
-// struct Foo {
-//     #[bar] <---- not "top" attribute
-//     bar: usize,
-// }
-fn render_attributes(w: &mut Buffer, it: &clean::Item, top: bool) {
-    let attrs = it
-        .attrs
-        .other_attrs
-        .iter()
-        .filter_map(|attr| {
-            if ALLOWED_ATTRIBUTES.contains(&attr.name_or_empty()) {
-                Some(pprust::attribute_to_string(&attr))
-            } else {
-                None
-            }
-        })
-        .join("\n");
-
-    if !attrs.is_empty() {
-        write!(
-            w,
-            "<span class=\"docblock attributes{}\">{}</span>",
-            if top { " top-attr" } else { "" },
-            &attrs
-        );
-    }
-}
-
-fn render_struct(
-    w: &mut Buffer,
-    it: &clean::Item,
-    g: Option<&clean::Generics>,
-    ty: doctree::StructType,
-    fields: &[clean::Item],
-    tab: &str,
-    structhead: bool,
-) {
-    write!(
-        w,
-        "{}{}{}",
-        it.visibility.print_with_space(),
-        if structhead { "struct " } else { "" },
-        it.name.as_ref().unwrap()
-    );
-    if let Some(g) = g {
-        write!(w, "{}", g.print())
-    }
-    match ty {
-        doctree::Plain => {
-            if let Some(g) = g {
-                write!(w, "{}", WhereClause { gens: g, indent: 0, end_newline: true })
-            }
-            let mut has_visible_fields = false;
-            write!(w, " {{");
-            for field in fields {
-                if let clean::StructFieldItem(ref ty) = field.inner {
-                    write!(
-                        w,
-                        "\n{}    {}{}: {},",
-                        tab,
-                        field.visibility.print_with_space(),
-                        field.name.as_ref().unwrap(),
-                        ty.print()
-                    );
-                    has_visible_fields = true;
-                }
-            }
-
-            if has_visible_fields {
-                if it.has_stripped_fields().unwrap() {
-                    write!(w, "\n{}    // some fields omitted", tab);
-                }
-                write!(w, "\n{}", tab);
-            } else if it.has_stripped_fields().unwrap() {
-                // If there are no visible fields we can just display
-                // `{ /* fields omitted */ }` to save space.
-                write!(w, " /* fields omitted */ ");
-            }
-            write!(w, "}}");
-        }
-        doctree::Tuple => {
-            write!(w, "(");
-            for (i, field) in fields.iter().enumerate() {
-                if i > 0 {
-                    write!(w, ", ");
-                }
-                match field.inner {
-                    clean::StrippedItem(box clean::StructFieldItem(..)) => write!(w, "_"),
-                    clean::StructFieldItem(ref ty) => {
-                        write!(w, "{}{}", field.visibility.print_with_space(), ty.print())
-                    }
-                    _ => unreachable!(),
-                }
-            }
-            write!(w, ")");
-            if let Some(g) = g {
-                write!(w, "{}", WhereClause { gens: g, indent: 0, end_newline: false })
-            }
-            write!(w, ";");
-        }
-        doctree::Unit => {
-            // Needed for PhantomData.
-            if let Some(g) = g {
-                write!(w, "{}", WhereClause { gens: g, indent: 0, end_newline: false })
-            }
-            write!(w, ";");
-        }
-    }
-}
-
-fn render_union(
-    w: &mut Buffer,
-    it: &clean::Item,
-    g: Option<&clean::Generics>,
-    fields: &[clean::Item],
-    tab: &str,
-    structhead: bool,
-) {
-    write!(
-        w,
-        "{}{}{}",
-        it.visibility.print_with_space(),
-        if structhead { "union " } else { "" },
-        it.name.as_ref().unwrap()
-    );
-    if let Some(g) = g {
-        write!(w, "{}", g.print());
-        write!(w, "{}", WhereClause { gens: g, indent: 0, end_newline: true });
-    }
-
-    write!(w, " {{\n{}", tab);
-    for field in fields {
-        if let clean::StructFieldItem(ref ty) = field.inner {
-            write!(
-                w,
-                "    {}{}: {},\n{}",
-                field.visibility.print_with_space(),
-                field.name.as_ref().unwrap(),
-                ty.print(),
-                tab
-            );
-        }
-    }
-
-    if it.has_stripped_fields().unwrap() {
-        write!(w, "    // some fields omitted\n{}", tab);
-    }
-    write!(w, "}}");
-}
-
-#[derive(Copy, Clone)]
-enum AssocItemLink<'a> {
-    Anchor(Option<&'a str>),
-    GotoSource(DefId, &'a FxHashSet<String>),
-}
-
-impl<'a> AssocItemLink<'a> {
-    fn anchor(&self, id: &'a String) -> Self {
-        match *self {
-            AssocItemLink::Anchor(_) => AssocItemLink::Anchor(Some(&id)),
-            ref other => *other,
-        }
-    }
-}
-
-enum AssocItemRender<'a> {
-    All,
-    DerefFor { trait_: &'a clean::Type, type_: &'a clean::Type, deref_mut_: bool },
-}
-
-#[derive(Copy, Clone, PartialEq)]
-enum RenderMode {
-    Normal,
-    ForDeref { mut_: bool },
-}
-
-fn render_assoc_items(
-    w: &mut Buffer,
-    cx: &Context,
-    containing_item: &clean::Item,
-    it: DefId,
-    what: AssocItemRender<'_>,
-) {
-    let c = &cx.cache;
-    let v = match c.impls.get(&it) {
-        Some(v) => v,
-        None => return,
-    };
-    let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| i.inner_impl().trait_.is_none());
-    if !non_trait.is_empty() {
-        let render_mode = match what {
-            AssocItemRender::All => {
-                write!(
-                    w,
-                    "\
-                    <h2 id='implementations' class='small-section-header'>\
-                      Implementations<a href='#implementations' class='anchor'></a>\
-                    </h2>\
-                "
-                );
-                RenderMode::Normal
-            }
-            AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => {
-                write!(
-                    w,
-                    "\
-                    <h2 id='deref-methods' class='small-section-header'>\
-                      Methods from {}&lt;Target = {}&gt;\
-                      <a href='#deref-methods' class='anchor'></a>\
-                    </h2>\
-                ",
-                    trait_.print(),
-                    type_.print()
-                );
-                RenderMode::ForDeref { mut_: deref_mut_ }
-            }
-        };
-        for i in &non_trait {
-            render_impl(
-                w,
-                cx,
-                i,
-                AssocItemLink::Anchor(None),
-                render_mode,
-                containing_item.stable_since(),
-                true,
-                None,
-                false,
-                true,
-                &[],
-            );
-        }
-    }
-    if let AssocItemRender::DerefFor { .. } = what {
-        return;
-    }
-    if !traits.is_empty() {
-        let deref_impl =
-            traits.iter().find(|t| t.inner_impl().trait_.def_id() == c.deref_trait_did);
-        if let Some(impl_) = deref_impl {
-            let has_deref_mut =
-                traits.iter().any(|t| t.inner_impl().trait_.def_id() == c.deref_mut_trait_did);
-            render_deref_methods(w, cx, impl_, containing_item, has_deref_mut);
-        }
-
-        let (synthetic, concrete): (Vec<&&Impl>, Vec<&&Impl>) =
-            traits.iter().partition(|t| t.inner_impl().synthetic);
-        let (blanket_impl, concrete): (Vec<&&Impl>, _) =
-            concrete.into_iter().partition(|t| t.inner_impl().blanket_impl.is_some());
-
-        let mut impls = Buffer::empty_from(&w);
-        render_impls(cx, &mut impls, &concrete, containing_item);
-        let impls = impls.into_inner();
-        if !impls.is_empty() {
-            write!(
-                w,
-                "\
-                <h2 id='trait-implementations' class='small-section-header'>\
-                  Trait Implementations<a href='#trait-implementations' class='anchor'></a>\
-                </h2>\
-                <div id='trait-implementations-list'>{}</div>",
-                impls
-            );
-        }
-
-        if !synthetic.is_empty() {
-            write!(
-                w,
-                "\
-                <h2 id='synthetic-implementations' class='small-section-header'>\
-                  Auto Trait Implementations\
-                  <a href='#synthetic-implementations' class='anchor'></a>\
-                </h2>\
-                <div id='synthetic-implementations-list'>\
-            "
-            );
-            render_impls(cx, w, &synthetic, containing_item);
-            write!(w, "</div>");
-        }
-
-        if !blanket_impl.is_empty() {
-            write!(
-                w,
-                "\
-                <h2 id='blanket-implementations' class='small-section-header'>\
-                  Blanket Implementations\
-                  <a href='#blanket-implementations' class='anchor'></a>\
-                </h2>\
-                <div id='blanket-implementations-list'>\
-            "
-            );
-            render_impls(cx, w, &blanket_impl, containing_item);
-            write!(w, "</div>");
-        }
-    }
-}
-
-fn render_deref_methods(
-    w: &mut Buffer,
-    cx: &Context,
-    impl_: &Impl,
-    container_item: &clean::Item,
-    deref_mut: bool,
-) {
-    let deref_type = impl_.inner_impl().trait_.as_ref().unwrap();
-    let (target, real_target) = impl_
-        .inner_impl()
-        .items
-        .iter()
-        .find_map(|item| match item.inner {
-            clean::TypedefItem(ref t, true) => Some(match *t {
-                clean::Typedef { item_type: Some(ref type_), .. } => (type_, &t.type_),
-                _ => (&t.type_, &t.type_),
-            }),
-            _ => None,
-        })
-        .expect("Expected associated type binding");
-    let what =
-        AssocItemRender::DerefFor { trait_: deref_type, type_: real_target, deref_mut_: deref_mut };
-    if let Some(did) = target.def_id() {
-        render_assoc_items(w, cx, container_item, did, what);
-    } else {
-        if let Some(prim) = target.primitive_type() {
-            if let Some(&did) = cx.cache.primitive_locations.get(&prim) {
-                render_assoc_items(w, cx, container_item, did, what);
-            }
-        }
-    }
-}
-
-fn should_render_item(item: &clean::Item, deref_mut_: bool) -> bool {
-    let self_type_opt = match item.inner {
-        clean::MethodItem(ref method) => method.decl.self_type(),
-        clean::TyMethodItem(ref method) => method.decl.self_type(),
-        _ => None,
-    };
-
-    if let Some(self_ty) = self_type_opt {
-        let (by_mut_ref, by_box, by_value) = match self_ty {
-            SelfTy::SelfBorrowed(_, mutability)
-            | SelfTy::SelfExplicit(clean::BorrowedRef { mutability, .. }) => {
-                (mutability == Mutability::Mut, false, false)
-            }
-            SelfTy::SelfExplicit(clean::ResolvedPath { did, .. }) => {
-                (false, Some(did) == cache().owned_box_did, false)
-            }
-            SelfTy::SelfValue => (false, false, true),
-            _ => (false, false, false),
-        };
-
-        (deref_mut_ || !by_mut_ref) && !by_box && !by_value
-    } else {
-        false
-    }
-}
-
-fn spotlight_decl(decl: &clean::FnDecl) -> String {
-    let mut out = Buffer::html();
-    let mut trait_ = String::new();
-
-    if let Some(did) = decl.output.def_id() {
-        let c = cache();
-        if let Some(impls) = c.impls.get(&did) {
-            for i in impls {
-                let impl_ = i.inner_impl();
-                if impl_.trait_.def_id().map_or(false, |d| c.traits[&d].is_spotlight) {
-                    if out.is_empty() {
-                        out.push_str(&format!(
-                            "<h3 class=\"important\">Important traits for {}</h3>\
-                                      <code class=\"content\">",
-                            impl_.for_.print()
-                        ));
-                        trait_.push_str(&impl_.for_.print().to_string());
-                    }
-
-                    //use the "where" class here to make it small
-                    out.push_str(&format!(
-                        "<span class=\"where fmt-newline\">{}</span>",
-                        impl_.print()
-                    ));
-                    let t_did = impl_.trait_.def_id().unwrap();
-                    for it in &impl_.items {
-                        if let clean::TypedefItem(ref tydef, _) = it.inner {
-                            out.push_str("<span class=\"where fmt-newline\">    ");
-                            assoc_type(
-                                &mut out,
-                                it,
-                                &[],
-                                Some(&tydef.type_),
-                                AssocItemLink::GotoSource(t_did, &FxHashSet::default()),
-                                "",
-                            );
-                            out.push_str(";</span>");
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    if !out.is_empty() {
-        out.insert_str(
-            0,
-            "<span class=\"important-traits\"><span class=\"important-traits-tooltip\">ⓘ<div class='important-traits-tooltiptext'><span class=\"docblock\">"
-
-        );
-        out.push_str("</code></span></div></span></span>");
-    }
-
-    out.into_inner()
-}
-
-fn render_impl(
-    w: &mut Buffer,
-    cx: &Context,
-    i: &Impl,
-    link: AssocItemLink<'_>,
-    render_mode: RenderMode,
-    outer_version: Option<&str>,
-    show_def_docs: bool,
-    use_absolute: Option<bool>,
-    is_on_foreign_type: bool,
-    show_default_items: bool,
-    // This argument is used to reference same type with different paths to avoid duplication
-    // in documentation pages for trait with automatic implementations like "Send" and "Sync".
-    aliases: &[String],
-) {
-    if render_mode == RenderMode::Normal {
-        let id = cx.derive_id(match i.inner_impl().trait_ {
-            Some(ref t) => {
-                if is_on_foreign_type {
-                    get_id_for_impl_on_foreign_type(&i.inner_impl().for_, t)
-                } else {
-                    format!("impl-{}", small_url_encode(&format!("{:#}", t.print())))
-                }
-            }
-            None => "impl".to_string(),
-        });
-        let aliases = if aliases.is_empty() {
-            String::new()
-        } else {
-            format!(" aliases=\"{}\"", aliases.join(","))
-        };
-        if let Some(use_absolute) = use_absolute {
-            write!(w, "<h3 id='{}' class='impl'{}><code class='in-band'>", id, aliases);
-            fmt_impl_for_trait_page(&i.inner_impl(), w, use_absolute);
-            if show_def_docs {
-                for it in &i.inner_impl().items {
-                    if let clean::TypedefItem(ref tydef, _) = it.inner {
-                        write!(w, "<span class=\"where fmt-newline\">  ");
-                        assoc_type(w, it, &[], Some(&tydef.type_), AssocItemLink::Anchor(None), "");
-                        write!(w, ";</span>");
-                    }
-                }
-            }
-            write!(w, "</code>");
-        } else {
-            write!(
-                w,
-                "<h3 id='{}' class='impl'{}><code class='in-band'>{}</code>",
-                id,
-                aliases,
-                i.inner_impl().print()
-            );
-        }
-        write!(w, "<a href='#{}' class='anchor'></a>", id);
-        let since = i.impl_item.stability.as_ref().map(|s| &s.since[..]);
-        render_stability_since_raw(w, since, outer_version);
-        if let Some(l) = cx.src_href(&i.impl_item) {
-            write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>", l, "goto source code");
-        }
-        write!(w, "</h3>");
-        if let Some(ref dox) = cx.shared.maybe_collapsed_doc_value(&i.impl_item) {
-            let mut ids = cx.id_map.borrow_mut();
-            write!(
-                w,
-                "<div class='docblock'>{}</div>",
-                Markdown(
-                    &*dox,
-                    &i.impl_item.links(),
-                    &mut ids,
-                    cx.shared.codes,
-                    cx.shared.edition,
-                    &cx.shared.playground
-                )
-                .into_string()
-            );
-        }
-    }
-
-    fn doc_impl_item(
-        w: &mut Buffer,
-        cx: &Context,
-        item: &clean::Item,
-        link: AssocItemLink<'_>,
-        render_mode: RenderMode,
-        is_default_item: bool,
-        outer_version: Option<&str>,
-        trait_: Option<&clean::Trait>,
-        show_def_docs: bool,
-    ) {
-        let item_type = item.type_();
-        let name = item.name.as_ref().unwrap();
-
-        let render_method_item = match render_mode {
-            RenderMode::Normal => true,
-            RenderMode::ForDeref { mut_: deref_mut_ } => should_render_item(&item, deref_mut_),
-        };
-
-        let (is_hidden, extra_class) =
-            if (trait_.is_none() || item.doc_value().is_some() || item.inner.is_associated())
-                && !is_default_item
-            {
-                (false, "")
-            } else {
-                (true, " hidden")
-            };
-        match item.inner {
-            clean::MethodItem(clean::Method { .. })
-            | clean::TyMethodItem(clean::TyMethod { .. }) => {
-                // Only render when the method is not static or we allow static methods
-                if render_method_item {
-                    let id = cx.derive_id(format!("{}.{}", item_type, name));
-                    write!(w, "<h4 id='{}' class=\"{}{}\">", id, item_type, extra_class);
-                    write!(w, "<code>");
-                    render_assoc_item(w, item, link.anchor(&id), ItemType::Impl);
-                    write!(w, "</code>");
-                    render_stability_since_raw(w, item.stable_since(), outer_version);
-                    if let Some(l) = cx.src_href(item) {
-                        write!(
-                            w,
-                            "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                            l, "goto source code"
-                        );
-                    }
-                    write!(w, "</h4>");
-                }
-            }
-            clean::TypedefItem(ref tydef, _) => {
-                let id = cx.derive_id(format!("{}.{}", ItemType::AssocType, name));
-                write!(w, "<h4 id='{}' class=\"{}{}\"><code>", id, item_type, extra_class);
-                assoc_type(w, item, &Vec::new(), Some(&tydef.type_), link.anchor(&id), "");
-                write!(w, "</code></h4>");
-            }
-            clean::AssocConstItem(ref ty, ref default) => {
-                let id = cx.derive_id(format!("{}.{}", item_type, name));
-                write!(w, "<h4 id='{}' class=\"{}{}\"><code>", id, item_type, extra_class);
-                assoc_const(w, item, ty, default.as_ref(), link.anchor(&id), "");
-                write!(w, "</code>");
-                render_stability_since_raw(w, item.stable_since(), outer_version);
-                if let Some(l) = cx.src_href(item) {
-                    write!(
-                        w,
-                        "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                        l, "goto source code"
-                    );
-                }
-                write!(w, "</h4>");
-            }
-            clean::AssocTypeItem(ref bounds, ref default) => {
-                let id = cx.derive_id(format!("{}.{}", item_type, name));
-                write!(w, "<h4 id='{}' class=\"{}{}\"><code>", id, item_type, extra_class);
-                assoc_type(w, item, bounds, default.as_ref(), link.anchor(&id), "");
-                write!(w, "</code></h4>");
-            }
-            clean::StrippedItem(..) => return,
-            _ => panic!("can't make docs for trait item with name {:?}", item.name),
-        }
-
-        if render_method_item {
-            if !is_default_item {
-                if let Some(t) = trait_ {
-                    // The trait item may have been stripped so we might not
-                    // find any documentation or stability for it.
-                    if let Some(it) = t.items.iter().find(|i| i.name == item.name) {
-                        // We need the stability of the item from the trait
-                        // because impls can't have a stability.
-                        document_stability(w, cx, it, is_hidden);
-                        if item.doc_value().is_some() {
-                            document_full(w, item, cx, "", is_hidden);
-                        } else if show_def_docs {
-                            // In case the item isn't documented,
-                            // provide short documentation from the trait.
-                            document_short(w, cx, it, link, "", is_hidden);
-                        }
-                    }
-                } else {
-                    document_stability(w, cx, item, is_hidden);
-                    if show_def_docs {
-                        document_full(w, item, cx, "", is_hidden);
-                    }
-                }
-            } else {
-                document_stability(w, cx, item, is_hidden);
-                if show_def_docs {
-                    document_short(w, cx, item, link, "", is_hidden);
-                }
-            }
-        }
-    }
-
-    let traits = &cx.cache.traits;
-    let trait_ = i.trait_did().map(|did| &traits[&did]);
-
-    write!(w, "<div class='impl-items'>");
-    for trait_item in &i.inner_impl().items {
-        doc_impl_item(
-            w,
-            cx,
-            trait_item,
-            link,
-            render_mode,
-            false,
-            outer_version,
-            trait_,
-            show_def_docs,
-        );
-    }
-
-    fn render_default_items(
-        w: &mut Buffer,
-        cx: &Context,
-        t: &clean::Trait,
-        i: &clean::Impl,
-        render_mode: RenderMode,
-        outer_version: Option<&str>,
-        show_def_docs: bool,
-    ) {
-        for trait_item in &t.items {
-            let n = trait_item.name.clone();
-            if i.items.iter().any(|m| m.name == n) {
-                continue;
-            }
-            let did = i.trait_.as_ref().unwrap().def_id().unwrap();
-            let assoc_link = AssocItemLink::GotoSource(did, &i.provided_trait_methods);
-
-            doc_impl_item(
-                w,
-                cx,
-                trait_item,
-                assoc_link,
-                render_mode,
-                true,
-                outer_version,
-                None,
-                show_def_docs,
-            );
-        }
-    }
-
-    // If we've implemented a trait, then also emit documentation for all
-    // default items which weren't overridden in the implementation block.
-    // We don't emit documentation for default items if they appear in the
-    // Implementations on Foreign Types or Implementors sections.
-    if show_default_items {
-        if let Some(t) = trait_ {
-            render_default_items(
-                w,
-                cx,
-                t,
-                &i.inner_impl(),
-                render_mode,
-                outer_version,
-                show_def_docs,
-            );
-        }
-    }
-    write!(w, "</div>");
-}
-
-fn item_opaque_ty(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::OpaqueTy) {
-    write!(w, "<pre class='rust opaque'>");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "type {}{}{where_clause} = impl {bounds};</pre>",
-        it.name.as_ref().unwrap(),
-        t.generics.print(),
-        where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-        bounds = bounds(&t.bounds, false)
-    );
-
-    document(w, cx, it);
-
-    // Render any items associated directly to this alias, as otherwise they
-    // won't be visible anywhere in the docs. It would be nice to also show
-    // associated items from the aliased type (see discussion in #32077), but
-    // we need #14072 to make sense of the generics.
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_trait_alias(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::TraitAlias) {
-    write!(w, "<pre class='rust trait-alias'>");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "trait {}{}{} = {};</pre>",
-        it.name.as_ref().unwrap(),
-        t.generics.print(),
-        WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-        bounds(&t.bounds, true)
-    );
-
-    document(w, cx, it);
-
-    // Render any items associated directly to this alias, as otherwise they
-    // won't be visible anywhere in the docs. It would be nice to also show
-    // associated items from the aliased type (see discussion in #32077), but
-    // we need #14072 to make sense of the generics.
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_typedef(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Typedef) {
-    write!(w, "<pre class='rust typedef'>");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "type {}{}{where_clause} = {type_};</pre>",
-        it.name.as_ref().unwrap(),
-        t.generics.print(),
-        where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-        type_ = t.type_.print()
-    );
-
-    document(w, cx, it);
-
-    // Render any items associated directly to this alias, as otherwise they
-    // won't be visible anywhere in the docs. It would be nice to also show
-    // associated items from the aliased type (see discussion in #32077), but
-    // we need #14072 to make sense of the generics.
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_foreign_type(w: &mut Buffer, cx: &Context, it: &clean::Item) {
-    writeln!(w, "<pre class='rust foreigntype'>extern {{");
-    render_attributes(w, it, false);
-    write!(
-        w,
-        "    {}type {};\n}}</pre>",
-        it.visibility.print_with_space(),
-        it.name.as_ref().unwrap(),
-    );
-
-    document(w, cx, it);
-
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn print_sidebar(cx: &Context, it: &clean::Item, buffer: &mut Buffer) {
-    let parentlen = cx.current.len() - if it.is_mod() { 1 } else { 0 };
-
-    if it.is_struct()
-        || it.is_trait()
-        || it.is_primitive()
-        || it.is_union()
-        || it.is_enum()
-        || it.is_mod()
-        || it.is_typedef()
-    {
-        write!(
-            buffer,
-            "<p class='location'>{}{}</p>",
-            match it.inner {
-                clean::StructItem(..) => "Struct ",
-                clean::TraitItem(..) => "Trait ",
-                clean::PrimitiveItem(..) => "Primitive Type ",
-                clean::UnionItem(..) => "Union ",
-                clean::EnumItem(..) => "Enum ",
-                clean::TypedefItem(..) => "Type Definition ",
-                clean::ForeignTypeItem => "Foreign Type ",
-                clean::ModuleItem(..) =>
-                    if it.is_crate() {
-                        "Crate "
-                    } else {
-                        "Module "
-                    },
-                _ => "",
-            },
-            it.name.as_ref().unwrap()
-        );
-    }
-
-    if it.is_crate() {
-        if let Some(ref version) = cx.cache.crate_version {
-            write!(
-                buffer,
-                "<div class='block version'>\
-                    <p>Version {}</p>\
-                    </div>",
-                Escape(version)
-            );
-        }
-    }
-
-    write!(buffer, "<div class=\"sidebar-elems\">");
-    if it.is_crate() {
-        write!(
-            buffer,
-            "<a id='all-types' href='all.html'><p>See all {}'s items</p></a>",
-            it.name.as_ref().expect("crates always have a name")
-        );
-    }
-    match it.inner {
-        clean::StructItem(ref s) => sidebar_struct(buffer, it, s),
-        clean::TraitItem(ref t) => sidebar_trait(buffer, it, t),
-        clean::PrimitiveItem(_) => sidebar_primitive(buffer, it),
-        clean::UnionItem(ref u) => sidebar_union(buffer, it, u),
-        clean::EnumItem(ref e) => sidebar_enum(buffer, it, e),
-        clean::TypedefItem(_, _) => sidebar_typedef(buffer, it),
-        clean::ModuleItem(ref m) => sidebar_module(buffer, &m.items),
-        clean::ForeignTypeItem => sidebar_foreign_type(buffer, it),
-        _ => (),
-    }
-
-    // The sidebar is designed to display sibling functions, modules and
-    // other miscellaneous information. since there are lots of sibling
-    // items (and that causes quadratic growth in large modules),
-    // we refactor common parts into a shared JavaScript file per module.
-    // still, we don't move everything into JS because we want to preserve
-    // as much HTML as possible in order to allow non-JS-enabled browsers
-    // to navigate the documentation (though slightly inefficiently).
-
-    write!(buffer, "<p class='location'>");
-    for (i, name) in cx.current.iter().take(parentlen).enumerate() {
-        if i > 0 {
-            write!(buffer, "::<wbr>");
-        }
-        write!(
-            buffer,
-            "<a href='{}index.html'>{}</a>",
-            &cx.root_path()[..(cx.current.len() - i - 1) * 3],
-            *name
-        );
-    }
-    write!(buffer, "</p>");
-
-    // Sidebar refers to the enclosing module, not this module.
-    let relpath = if it.is_mod() { "../" } else { "" };
-    write!(
-        buffer,
-        "<script>window.sidebarCurrent = {{\
-                name: '{name}', \
-                ty: '{ty}', \
-                relpath: '{path}'\
-            }};</script>",
-        name = it.name.as_ref().map(|x| &x[..]).unwrap_or(""),
-        ty = it.type_(),
-        path = relpath
-    );
-    if parentlen == 0 {
-        // There is no sidebar-items.js beyond the crate root path
-        // FIXME maybe dynamic crate loading can be merged here
-    } else {
-        write!(buffer, "<script defer src=\"{path}sidebar-items.js\"></script>", path = relpath);
-    }
-    // Closes sidebar-elems div.
-    write!(buffer, "</div>");
-}
-
-fn get_next_url(used_links: &mut FxHashSet<String>, url: String) -> String {
-    if used_links.insert(url.clone()) {
-        return url;
-    }
-    let mut add = 1;
-    while !used_links.insert(format!("{}-{}", url, add)) {
-        add += 1;
-    }
-    format!("{}-{}", url, add)
-}
-
-fn get_methods(
-    i: &clean::Impl,
-    for_deref: bool,
-    used_links: &mut FxHashSet<String>,
-    deref_mut: bool,
-) -> Vec<String> {
-    i.items
-        .iter()
-        .filter_map(|item| match item.name {
-            Some(ref name) if !name.is_empty() && item.is_method() => {
-                if !for_deref || should_render_item(item, deref_mut) {
-                    Some(format!(
-                        "<a href=\"#{}\">{}</a>",
-                        get_next_url(used_links, format!("method.{}", name)),
-                        name
-                    ))
-                } else {
-                    None
-                }
-            }
-            _ => None,
-        })
-        .collect::<Vec<_>>()
-}
-
-// The point is to url encode any potential character from a type with genericity.
-fn small_url_encode(s: &str) -> String {
-    s.replace("<", "%3C")
-        .replace(">", "%3E")
-        .replace(" ", "%20")
-        .replace("?", "%3F")
-        .replace("'", "%27")
-        .replace("&", "%26")
-        .replace(",", "%2C")
-        .replace(":", "%3A")
-        .replace(";", "%3B")
-        .replace("[", "%5B")
-        .replace("]", "%5D")
-        .replace("\"", "%22")
-}
-
-fn sidebar_assoc_items(it: &clean::Item) -> String {
-    let mut out = String::new();
-    let c = cache();
-    if let Some(v) = c.impls.get(&it.def_id) {
-        let mut used_links = FxHashSet::default();
-
-        {
-            let used_links_bor = &mut used_links;
-            let mut ret = v
-                .iter()
-                .filter(|i| i.inner_impl().trait_.is_none())
-                .flat_map(move |i| get_methods(i.inner_impl(), false, used_links_bor, false))
-                .collect::<Vec<_>>();
-            if !ret.is_empty() {
-                // We want links' order to be reproducible so we don't use unstable sort.
-                ret.sort();
-                out.push_str(&format!(
-                    "<a class=\"sidebar-title\" href=\"#implementations\">Methods</a>\
-                     <div class=\"sidebar-links\">{}</div>",
-                    ret.join("")
-                ));
-            }
-        }
-
-        if v.iter().any(|i| i.inner_impl().trait_.is_some()) {
-            if let Some(impl_) = v
-                .iter()
-                .filter(|i| i.inner_impl().trait_.is_some())
-                .find(|i| i.inner_impl().trait_.def_id() == c.deref_trait_did)
-            {
-                if let Some((target, real_target)) =
-                    impl_.inner_impl().items.iter().find_map(|item| match item.inner {
-                        clean::TypedefItem(ref t, true) => Some(match *t {
-                            clean::Typedef { item_type: Some(ref type_), .. } => (type_, &t.type_),
-                            _ => (&t.type_, &t.type_),
-                        }),
-                        _ => None,
-                    })
-                {
-                    let deref_mut = v
-                        .iter()
-                        .filter(|i| i.inner_impl().trait_.is_some())
-                        .any(|i| i.inner_impl().trait_.def_id() == c.deref_mut_trait_did);
-                    let inner_impl = target
-                        .def_id()
-                        .or(target
-                            .primitive_type()
-                            .and_then(|prim| c.primitive_locations.get(&prim).cloned()))
-                        .and_then(|did| c.impls.get(&did));
-                    if let Some(impls) = inner_impl {
-                        out.push_str("<a class=\"sidebar-title\" href=\"#deref-methods\">");
-                        out.push_str(&format!(
-                            "Methods from {}&lt;Target={}&gt;",
-                            Escape(&format!(
-                                "{:#}",
-                                impl_.inner_impl().trait_.as_ref().unwrap().print()
-                            )),
-                            Escape(&format!("{:#}", real_target.print()))
-                        ));
-                        out.push_str("</a>");
-                        let mut ret = impls
-                            .iter()
-                            .filter(|i| i.inner_impl().trait_.is_none())
-                            .flat_map(|i| {
-                                get_methods(i.inner_impl(), true, &mut used_links, deref_mut)
-                            })
-                            .collect::<Vec<_>>();
-                        // We want links' order to be reproducible so we don't use unstable sort.
-                        ret.sort();
-                        if !ret.is_empty() {
-                            out.push_str(&format!(
-                                "<div class=\"sidebar-links\">{}</div>",
-                                ret.join("")
-                            ));
-                        }
-                    }
-                }
-            }
-            let format_impls = |impls: Vec<&Impl>| {
-                let mut links = FxHashSet::default();
-
-                let mut ret = impls
-                    .iter()
-                    .filter_map(|i| {
-                        let is_negative_impl = is_negative_impl(i.inner_impl());
-                        if let Some(ref i) = i.inner_impl().trait_ {
-                            let i_display = format!("{:#}", i.print());
-                            let out = Escape(&i_display);
-                            let encoded = small_url_encode(&format!("{:#}", i.print()));
-                            let generated = format!(
-                                "<a href=\"#impl-{}\">{}{}</a>",
-                                encoded,
-                                if is_negative_impl { "!" } else { "" },
-                                out
-                            );
-                            if links.insert(generated.clone()) { Some(generated) } else { None }
-                        } else {
-                            None
-                        }
-                    })
-                    .collect::<Vec<String>>();
-                ret.sort();
-                ret.join("")
-            };
-
-            let (synthetic, concrete): (Vec<&Impl>, Vec<&Impl>) =
-                v.iter().partition::<Vec<_>, _>(|i| i.inner_impl().synthetic);
-            let (blanket_impl, concrete): (Vec<&Impl>, Vec<&Impl>) = concrete
-                .into_iter()
-                .partition::<Vec<_>, _>(|i| i.inner_impl().blanket_impl.is_some());
-
-            let concrete_format = format_impls(concrete);
-            let synthetic_format = format_impls(synthetic);
-            let blanket_format = format_impls(blanket_impl);
-
-            if !concrete_format.is_empty() {
-                out.push_str(
-                    "<a class=\"sidebar-title\" href=\"#trait-implementations\">\
-                        Trait Implementations</a>",
-                );
-                out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", concrete_format));
-            }
-
-            if !synthetic_format.is_empty() {
-                out.push_str(
-                    "<a class=\"sidebar-title\" href=\"#synthetic-implementations\">\
-                        Auto Trait Implementations</a>",
-                );
-                out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", synthetic_format));
-            }
-
-            if !blanket_format.is_empty() {
-                out.push_str(
-                    "<a class=\"sidebar-title\" href=\"#blanket-implementations\">\
-                        Blanket Implementations</a>",
-                );
-                out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", blanket_format));
-            }
-        }
-    }
-
-    out
-}
-
-fn sidebar_struct(buf: &mut Buffer, it: &clean::Item, s: &clean::Struct) {
-    let mut sidebar = String::new();
-    let fields = get_struct_fields_name(&s.fields);
-
-    if !fields.is_empty() {
-        if let doctree::Plain = s.struct_type {
-            sidebar.push_str(&format!(
-                "<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
-                                       <div class=\"sidebar-links\">{}</div>",
-                fields
-            ));
-        }
-    }
-
-    sidebar.push_str(&sidebar_assoc_items(it));
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn get_id_for_impl_on_foreign_type(for_: &clean::Type, trait_: &clean::Type) -> String {
-    small_url_encode(&format!("impl-{:#}-for-{:#}", trait_.print(), for_.print()))
-}
-
-fn extract_for_impl_name(item: &clean::Item) -> Option<(String, String)> {
-    match item.inner {
-        clean::ItemEnum::ImplItem(ref i) => {
-            if let Some(ref trait_) = i.trait_ {
-                Some((
-                    format!("{:#}", i.for_.print()),
-                    get_id_for_impl_on_foreign_type(&i.for_, trait_),
-                ))
-            } else {
-                None
-            }
-        }
-        _ => None,
-    }
-}
-
-fn is_negative_impl(i: &clean::Impl) -> bool {
-    i.polarity == Some(clean::ImplPolarity::Negative)
-}
-
-fn sidebar_trait(buf: &mut Buffer, it: &clean::Item, t: &clean::Trait) {
-    let mut sidebar = String::new();
-
-    let mut types = t
-        .items
-        .iter()
-        .filter_map(|m| match m.name {
-            Some(ref name) if m.is_associated_type() => {
-                Some(format!("<a href=\"#associatedtype.{name}\">{name}</a>", name = name))
-            }
-            _ => None,
-        })
-        .collect::<Vec<_>>();
-    let mut consts = t
-        .items
-        .iter()
-        .filter_map(|m| match m.name {
-            Some(ref name) if m.is_associated_const() => {
-                Some(format!("<a href=\"#associatedconstant.{name}\">{name}</a>", name = name))
-            }
-            _ => None,
-        })
-        .collect::<Vec<_>>();
-    let mut required = t
-        .items
-        .iter()
-        .filter_map(|m| match m.name {
-            Some(ref name) if m.is_ty_method() => {
-                Some(format!("<a href=\"#tymethod.{name}\">{name}</a>", name = name))
-            }
-            _ => None,
-        })
-        .collect::<Vec<String>>();
-    let mut provided = t
-        .items
-        .iter()
-        .filter_map(|m| match m.name {
-            Some(ref name) if m.is_method() => {
-                Some(format!("<a href=\"#method.{0}\">{0}</a>", name))
-            }
-            _ => None,
-        })
-        .collect::<Vec<String>>();
-
-    if !types.is_empty() {
-        types.sort();
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#associated-types\">\
-                Associated Types</a><div class=\"sidebar-links\">{}</div>",
-            types.join("")
-        ));
-    }
-    if !consts.is_empty() {
-        consts.sort();
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#associated-const\">\
-                Associated Constants</a><div class=\"sidebar-links\">{}</div>",
-            consts.join("")
-        ));
-    }
-    if !required.is_empty() {
-        required.sort();
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#required-methods\">\
-                Required Methods</a><div class=\"sidebar-links\">{}</div>",
-            required.join("")
-        ));
-    }
-    if !provided.is_empty() {
-        provided.sort();
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#provided-methods\">\
-                Provided Methods</a><div class=\"sidebar-links\">{}</div>",
-            provided.join("")
-        ));
-    }
-
-    let c = cache();
-
-    if let Some(implementors) = c.implementors.get(&it.def_id) {
-        let mut res = implementors
-            .iter()
-            .filter(|i| i.inner_impl().for_.def_id().map_or(false, |d| !c.paths.contains_key(&d)))
-            .filter_map(|i| extract_for_impl_name(&i.impl_item))
-            .collect::<Vec<_>>();
-
-        if !res.is_empty() {
-            res.sort();
-            sidebar.push_str(&format!(
-                "<a class=\"sidebar-title\" href=\"#foreign-impls\">\
-                    Implementations on Foreign Types</a><div \
-                    class=\"sidebar-links\">{}</div>",
-                res.into_iter()
-                    .map(|(name, id)| format!("<a href=\"#{}\">{}</a>", id, Escape(&name)))
-                    .collect::<Vec<_>>()
-                    .join("")
-            ));
-        }
-    }
-
-    sidebar.push_str(&sidebar_assoc_items(it));
-
-    sidebar.push_str("<a class=\"sidebar-title\" href=\"#implementors\">Implementors</a>");
-    if t.auto {
-        sidebar.push_str(
-            "<a class=\"sidebar-title\" \
-                href=\"#synthetic-implementors\">Auto Implementors</a>",
-        );
-    }
-
-    write!(buf, "<div class=\"block items\">{}</div>", sidebar)
-}
-
-fn sidebar_primitive(buf: &mut Buffer, it: &clean::Item) {
-    let sidebar = sidebar_assoc_items(it);
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn sidebar_typedef(buf: &mut Buffer, it: &clean::Item) {
-    let sidebar = sidebar_assoc_items(it);
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn get_struct_fields_name(fields: &[clean::Item]) -> String {
-    let mut fields = fields
-        .iter()
-        .filter(|f| if let clean::StructFieldItem(..) = f.inner { true } else { false })
-        .filter_map(|f| match f.name {
-            Some(ref name) => {
-                Some(format!("<a href=\"#structfield.{name}\">{name}</a>", name = name))
-            }
-            _ => None,
-        })
-        .collect::<Vec<_>>();
-    fields.sort();
-    fields.join("")
-}
-
-fn sidebar_union(buf: &mut Buffer, it: &clean::Item, u: &clean::Union) {
-    let mut sidebar = String::new();
-    let fields = get_struct_fields_name(&u.fields);
-
-    if !fields.is_empty() {
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
-             <div class=\"sidebar-links\">{}</div>",
-            fields
-        ));
-    }
-
-    sidebar.push_str(&sidebar_assoc_items(it));
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn sidebar_enum(buf: &mut Buffer, it: &clean::Item, e: &clean::Enum) {
-    let mut sidebar = String::new();
-
-    let mut variants = e
-        .variants
-        .iter()
-        .filter_map(|v| match v.name {
-            Some(ref name) => Some(format!("<a href=\"#variant.{name}\">{name}</a>", name = name)),
-            _ => None,
-        })
-        .collect::<Vec<_>>();
-    if !variants.is_empty() {
-        variants.sort_unstable();
-        sidebar.push_str(&format!(
-            "<a class=\"sidebar-title\" href=\"#variants\">Variants</a>\
-             <div class=\"sidebar-links\">{}</div>",
-            variants.join(""),
-        ));
-    }
-
-    sidebar.push_str(&sidebar_assoc_items(it));
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn item_ty_to_strs(ty: &ItemType) -> (&'static str, &'static str) {
-    match *ty {
-        ItemType::ExternCrate | ItemType::Import => ("reexports", "Re-exports"),
-        ItemType::Module => ("modules", "Modules"),
-        ItemType::Struct => ("structs", "Structs"),
-        ItemType::Union => ("unions", "Unions"),
-        ItemType::Enum => ("enums", "Enums"),
-        ItemType::Function => ("functions", "Functions"),
-        ItemType::Typedef => ("types", "Type Definitions"),
-        ItemType::Static => ("statics", "Statics"),
-        ItemType::Constant => ("constants", "Constants"),
-        ItemType::Trait => ("traits", "Traits"),
-        ItemType::Impl => ("impls", "Implementations"),
-        ItemType::TyMethod => ("tymethods", "Type Methods"),
-        ItemType::Method => ("methods", "Methods"),
-        ItemType::StructField => ("fields", "Struct Fields"),
-        ItemType::Variant => ("variants", "Variants"),
-        ItemType::Macro => ("macros", "Macros"),
-        ItemType::Primitive => ("primitives", "Primitive Types"),
-        ItemType::AssocType => ("associated-types", "Associated Types"),
-        ItemType::AssocConst => ("associated-consts", "Associated Constants"),
-        ItemType::ForeignType => ("foreign-types", "Foreign Types"),
-        ItemType::Keyword => ("keywords", "Keywords"),
-        ItemType::OpaqueTy => ("opaque-types", "Opaque Types"),
-        ItemType::ProcAttribute => ("attributes", "Attribute Macros"),
-        ItemType::ProcDerive => ("derives", "Derive Macros"),
-        ItemType::TraitAlias => ("trait-aliases", "Trait aliases"),
-    }
-}
-
-fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) {
-    let mut sidebar = String::new();
-
-    if items.iter().any(|it| it.type_() == ItemType::ExternCrate || it.type_() == ItemType::Import)
-    {
-        sidebar.push_str(&format!(
-            "<li><a href=\"#{id}\">{name}</a></li>",
-            id = "reexports",
-            name = "Re-exports"
-        ));
-    }
-
-    // ordering taken from item_module, reorder, where it prioritized elements in a certain order
-    // to print its headings
-    for &myty in &[
-        ItemType::Primitive,
-        ItemType::Module,
-        ItemType::Macro,
-        ItemType::Struct,
-        ItemType::Enum,
-        ItemType::Constant,
-        ItemType::Static,
-        ItemType::Trait,
-        ItemType::Function,
-        ItemType::Typedef,
-        ItemType::Union,
-        ItemType::Impl,
-        ItemType::TyMethod,
-        ItemType::Method,
-        ItemType::StructField,
-        ItemType::Variant,
-        ItemType::AssocType,
-        ItemType::AssocConst,
-        ItemType::ForeignType,
-        ItemType::Keyword,
-    ] {
-        if items.iter().any(|it| !it.is_stripped() && it.type_() == myty) {
-            let (short, name) = item_ty_to_strs(&myty);
-            sidebar.push_str(&format!(
-                "<li><a href=\"#{id}\">{name}</a></li>",
-                id = short,
-                name = name
-            ));
-        }
-    }
-
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\"><ul>{}</ul></div>", sidebar);
-    }
-}
-
-fn sidebar_foreign_type(buf: &mut Buffer, it: &clean::Item) {
-    let sidebar = sidebar_assoc_items(it);
-    if !sidebar.is_empty() {
-        write!(buf, "<div class=\"block items\">{}</div>", sidebar);
-    }
-}
-
-fn item_macro(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Macro) {
-    wrap_into_docblock(w, |w| {
-        w.write_str(&highlight::render_with_highlighting(
-            t.source.clone(),
-            Some("macro"),
-            None,
-            None,
-        ))
-    });
-    document(w, cx, it)
-}
-
-fn item_proc_macro(w: &mut Buffer, cx: &Context, it: &clean::Item, m: &clean::ProcMacro) {
-    let name = it.name.as_ref().expect("proc-macros always have names");
-    match m.kind {
-        MacroKind::Bang => {
-            write!(w, "<pre class='rust macro'>");
-            write!(w, "{}!() {{ /* proc-macro */ }}", name);
-            write!(w, "</pre>");
-        }
-        MacroKind::Attr => {
-            write!(w, "<pre class='rust attr'>");
-            write!(w, "#[{}]", name);
-            write!(w, "</pre>");
-        }
-        MacroKind::Derive => {
-            write!(w, "<pre class='rust derive'>");
-            write!(w, "#[derive({})]", name);
-            if !m.helpers.is_empty() {
-                writeln!(w, "\n{{");
-                writeln!(w, "    // Attributes available to this derive:");
-                for attr in &m.helpers {
-                    writeln!(w, "    #[{}]", attr);
-                }
-                write!(w, "}}");
-            }
-            write!(w, "</pre>");
-        }
-    }
-    document(w, cx, it)
-}
-
-fn item_primitive(w: &mut Buffer, cx: &Context, it: &clean::Item) {
-    document(w, cx, it);
-    render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
-}
-
-fn item_keyword(w: &mut Buffer, cx: &Context, it: &clean::Item) {
-    document(w, cx, it)
-}
-
-crate const BASIC_KEYWORDS: &str = "rust, rustlang, rust-lang";
-
-fn make_item_keywords(it: &clean::Item) -> String {
-    format!("{}, {}", BASIC_KEYWORDS, it.name.as_ref().unwrap())
-}
-
-/// Returns a list of all paths used in the type.
-/// This is used to help deduplicate imported impls
-/// for reexported types. If any of the contained
-/// types are re-exported, we don't use the corresponding
-/// entry from the js file, as inlining will have already
-/// picked up the impl
-fn collect_paths_for_type(first_ty: clean::Type) -> Vec<String> {
-    let mut out = Vec::new();
-    let mut visited = FxHashSet::default();
-    let mut work = VecDeque::new();
-    let cache = cache();
-
-    work.push_back(first_ty);
-
-    while let Some(ty) = work.pop_front() {
-        if !visited.insert(ty.clone()) {
-            continue;
-        }
-
-        match ty {
-            clean::Type::ResolvedPath { did, .. } => {
-                let get_extern = || cache.external_paths.get(&did).map(|s| s.0.clone());
-                let fqp = cache.exact_paths.get(&did).cloned().or_else(get_extern);
-
-                if let Some(path) = fqp {
-                    out.push(path.join("::"));
-                }
-            }
-            clean::Type::Tuple(tys) => {
-                work.extend(tys.into_iter());
-            }
-            clean::Type::Slice(ty) => {
-                work.push_back(*ty);
-            }
-            clean::Type::Array(ty, _) => {
-                work.push_back(*ty);
-            }
-            clean::Type::RawPointer(_, ty) => {
-                work.push_back(*ty);
-            }
-            clean::Type::BorrowedRef { type_, .. } => {
-                work.push_back(*type_);
-            }
-            clean::Type::QPath { self_type, trait_, .. } => {
-                work.push_back(*self_type);
-                work.push_back(*trait_);
-            }
-            _ => {}
-        }
-    }
-    out
-}
-
-crate fn cache() -> Arc<Cache> {
-    CACHE_KEY.with(|c| c.borrow().clone())
-}