1 // Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Rustdoc's HTML Rendering module
13 //! This modules contains the bulk of the logic necessary for rendering a
14 //! rustdoc `clean::Crate` instance to a set of static HTML pages. This
15 //! rendering process is largely driven by the `format!` syntax extension to
16 //! perform all I/O into files and streams.
18 //! The rendering process is largely driven by the `Context` and `Cache`
19 //! structures. The cache is pre-populated by crawling the crate in question,
20 //! and then it is shared among the various rendering threads. The cache is meant
21 //! to be a fairly large structure not implementing `Clone` (because it's shared
22 //! among threads). The context, however, should be a lightweight structure. This
23 //! is cloned per-thread and contains information about what is currently being
26 //! In order to speed up rendering (mostly because of markdown rendering), the
27 //! rendering process has been parallelized. This parallelization is only
28 //! exposed through the `crate` method on the context, and then also from the
29 //! fact that the shared cache is stored in TLS (and must be accessed as such).
31 //! In addition to rendering the crate itself, this module is also responsible
32 //! for creating the corresponding search index and source file renderings.
33 //! These threads are not parallelized (they haven't been a bottleneck yet), and
34 //! both occur before the crate is rendered.
35 pub use self::ExternalLocation::*;
37 use std::ascii::AsciiExt;
38 use std::cell::RefCell;
39 use std::cmp::Ordering;
40 use std::collections::BTreeMap;
41 use std::default::Default;
43 use std::fmt::{self, Display, Formatter, Write as FmtWrite};
44 use std::fs::{self, File, OpenOptions};
45 use std::io::prelude::*;
46 use std::io::{self, BufWriter, BufReader};
47 use std::iter::repeat;
49 use std::path::{PathBuf, Path, Component};
53 use externalfiles::ExternalHtml;
55 use serialize::json::{ToJson, Json, as_json};
56 use syntax::{abi, ast};
57 use syntax::feature_gate::UnstableFeatures;
58 use rustc::hir::def_id::{CrateNum, CRATE_DEF_INDEX, DefId};
59 use rustc::middle::privacy::AccessLevels;
60 use rustc::middle::stability;
62 use rustc::util::nodemap::{FxHashMap, FxHashSet};
63 use rustc_data_structures::flock;
65 use clean::{self, AttributesExt, GetDefId, SelfTy, Mutability};
68 use html::escape::Escape;
69 use html::format::{ConstnessSpace};
70 use html::format::{TyParamBounds, WhereClause, href, AbiSpace};
71 use html::format::{VisSpace, Method, UnsafetySpace, MutableSpace};
72 use html::format::fmt_impl_for_trait_page;
73 use html::item_type::ItemType;
74 use html::markdown::{self, Markdown, MarkdownHtml};
75 use html::{highlight, layout};
77 /// A pair of name and its optional document.
78 pub type NameDoc = (String, Option<String>);
80 /// Major driving force in all rustdoc rendering. This contains information
81 /// about where in the tree-like hierarchy rendering is occurring and controls
82 /// how the current page is being rendered.
84 /// It is intended that this context is a lightweight object which can be fairly
85 /// easily cloned because it is cloned per work-job (about once per item in the
89 /// Current hierarchy of components leading down to what's currently being
91 pub current: Vec<String>,
92 /// The current destination folder of where HTML artifacts should be placed.
93 /// This changes as the context descends into the module hierarchy.
95 /// A flag, which when `true`, will render pages which redirect to the
96 /// real location of an item. This is used to allow external links to
97 /// publicly reused items to redirect to the right location.
98 pub render_redirect_pages: bool,
99 pub shared: Arc<SharedContext>,
102 pub struct SharedContext {
103 /// The path to the crate root source minus the file name.
104 /// Used for simplifying paths to the highlighted source code files.
105 pub src_root: PathBuf,
106 /// This describes the layout of each page, and is not modified after
107 /// creation of the context (contains info like the favicon and added html).
108 pub layout: layout::Layout,
109 /// This flag indicates whether [src] links should be generated or not. If
110 /// the source files are present in the html rendering, then this will be
112 pub include_sources: bool,
113 /// The local file sources we've emitted and their respective url-paths.
114 pub local_sources: FxHashMap<PathBuf, String>,
115 /// All the passes that were run on this crate.
116 pub passes: FxHashSet<String>,
117 /// The base-URL of the issue tracker for when an item has been tagged with
119 pub issue_tracker_base_url: Option<String>,
120 /// The given user css file which allow to customize the generated
121 /// documentation theme.
122 pub css_file_extension: Option<PathBuf>,
125 /// Indicates where an external crate can be found.
126 pub enum ExternalLocation {
127 /// Remote URL root of the external crate
129 /// This external crate can be found in the local doc/ folder
131 /// The external crate could not be found.
135 /// Metadata about an implementor of a trait.
136 pub struct Implementor {
138 pub stability: Option<clean::Stability>,
139 pub impl_: clean::Impl,
142 /// Metadata about implementations for a type.
145 pub impl_item: clean::Item,
149 fn inner_impl(&self) -> &clean::Impl {
150 match self.impl_item.inner {
151 clean::ImplItem(ref impl_) => impl_,
152 _ => panic!("non-impl item found in impl")
156 fn trait_did(&self) -> Option<DefId> {
157 self.inner_impl().trait_.def_id()
167 impl error::Error for Error {
168 fn description(&self) -> &str {
169 self.error.description()
173 impl Display for Error {
174 fn fmt(&self, f: &mut Formatter) -> fmt::Result {
175 write!(f, "\"{}\": {}", self.file.display(), self.error)
180 pub fn new(e: io::Error, file: &Path) -> Error {
182 file: file.to_path_buf(),
188 macro_rules! try_err {
189 ($e:expr, $file:expr) => ({
192 Err(e) => return Err(Error::new(e, $file)),
197 /// This cache is used to store information about the `clean::Crate` being
198 /// rendered in order to provide more useful documentation. This contains
199 /// information like all implementors of a trait, all traits a type implements,
200 /// documentation for all known traits, etc.
202 /// This structure purposefully does not implement `Clone` because it's intended
203 /// to be a fairly large and expensive structure to clone. Instead this adheres
204 /// to `Send` so it may be stored in a `Arc` instance and shared among the various
205 /// rendering threads.
208 /// Mapping of typaram ids to the name of the type parameter. This is used
209 /// when pretty-printing a type (so pretty printing doesn't have to
210 /// painfully maintain a context like this)
211 pub typarams: FxHashMap<DefId, String>,
213 /// Maps a type id to all known implementations for that type. This is only
214 /// recognized for intra-crate `ResolvedPath` types, and is used to print
215 /// out extra documentation on the page of an enum/struct.
217 /// The values of the map are a list of implementations and documentation
218 /// found on that implementation.
219 pub impls: FxHashMap<DefId, Vec<Impl>>,
221 /// Maintains a mapping of local crate node ids to the fully qualified name
222 /// and "short type description" of that node. This is used when generating
223 /// URLs when a type is being linked to. External paths are not located in
224 /// this map because the `External` type itself has all the information
226 pub paths: FxHashMap<DefId, (Vec<String>, ItemType)>,
228 /// Similar to `paths`, but only holds external paths. This is only used for
229 /// generating explicit hyperlinks to other crates.
230 pub external_paths: FxHashMap<DefId, (Vec<String>, ItemType)>,
232 /// This map contains information about all known traits of this crate.
233 /// Implementations of a crate should inherit the documentation of the
234 /// parent trait if no extra documentation is specified, and default methods
235 /// should show up in documentation about trait implementations.
236 pub traits: FxHashMap<DefId, clean::Trait>,
238 /// When rendering traits, it's often useful to be able to list all
239 /// implementors of the trait, and this mapping is exactly, that: a mapping
240 /// of trait ids to the list of known implementors of the trait
241 pub implementors: FxHashMap<DefId, Vec<Implementor>>,
243 /// Cache of where external crate documentation can be found.
244 pub extern_locations: FxHashMap<CrateNum, (String, PathBuf, ExternalLocation)>,
246 /// Cache of where documentation for primitives can be found.
247 pub primitive_locations: FxHashMap<clean::PrimitiveType, DefId>,
249 // Note that external items for which `doc(hidden)` applies to are shown as
250 // non-reachable while local items aren't. This is because we're reusing
251 // the access levels from crateanalysis.
252 pub access_levels: Arc<AccessLevels<DefId>>,
254 // Private fields only used when initially crawling a crate to build a cache
257 parent_stack: Vec<DefId>,
258 parent_is_trait_impl: bool,
259 search_index: Vec<IndexItem>,
261 deref_trait_did: Option<DefId>,
262 deref_mut_trait_did: Option<DefId>,
264 // In rare case where a structure is defined in one module but implemented
265 // in another, if the implementing module is parsed before defining module,
266 // then the fully qualified name of the structure isn't presented in `paths`
267 // yet when its implementation methods are being indexed. Caches such methods
268 // and their parent id here and indexes them at the end of crate parsing.
269 orphan_impl_items: Vec<(DefId, clean::Item)>,
272 /// Temporary storage for data obtained during `RustdocVisitor::clean()`.
273 /// Later on moved into `CACHE_KEY`.
275 pub struct RenderInfo {
276 pub inlined: FxHashSet<DefId>,
277 pub external_paths: ::core::ExternalPaths,
278 pub external_typarams: FxHashMap<DefId, String>,
279 pub deref_trait_did: Option<DefId>,
280 pub deref_mut_trait_did: Option<DefId>,
283 /// Helper struct to render all source code to HTML pages
284 struct SourceCollector<'a> {
285 scx: &'a mut SharedContext,
287 /// Root destination to place all HTML output into
291 /// Wrapper struct to render the source code of a file. This will do things like
292 /// adding line numbers to the left-hand side.
293 struct Source<'a>(&'a str);
295 // Helper structs for rendering items/sidebars and carrying along contextual
298 #[derive(Copy, Clone)]
301 item: &'a clean::Item,
304 struct Sidebar<'a> { cx: &'a Context, item: &'a clean::Item, }
306 /// Struct representing one entry in the JS search index. These are all emitted
307 /// by hand to a large JS file at the end of cache-creation.
313 parent: Option<DefId>,
314 parent_idx: Option<usize>,
315 search_type: Option<IndexItemFunctionType>,
318 impl ToJson for IndexItem {
319 fn to_json(&self) -> Json {
320 assert_eq!(self.parent.is_some(), self.parent_idx.is_some());
322 let mut data = Vec::with_capacity(6);
323 data.push((self.ty as usize).to_json());
324 data.push(self.name.to_json());
325 data.push(self.path.to_json());
326 data.push(self.desc.to_json());
327 data.push(self.parent_idx.to_json());
328 data.push(self.search_type.to_json());
334 /// A type used for the search index.
336 name: Option<String>,
339 impl ToJson for Type {
340 fn to_json(&self) -> Json {
343 let mut data = BTreeMap::new();
344 data.insert("name".to_owned(), name.to_json());
352 /// Full type of functions/methods in the search index.
353 struct IndexItemFunctionType {
358 impl ToJson for IndexItemFunctionType {
359 fn to_json(&self) -> Json {
360 // If we couldn't figure out a type, just write `null`.
361 if self.inputs.iter().chain(self.output.iter()).any(|ref i| i.name.is_none()) {
364 let mut data = BTreeMap::new();
365 data.insert("inputs".to_owned(), self.inputs.to_json());
366 data.insert("output".to_owned(), self.output.to_json());
372 // TLS keys used to carry information around during rendering.
374 thread_local!(static CACHE_KEY: RefCell<Arc<Cache>> = Default::default());
375 thread_local!(pub static CURRENT_LOCATION_KEY: RefCell<Vec<String>> =
376 RefCell::new(Vec::new()));
377 thread_local!(static USED_ID_MAP: RefCell<FxHashMap<String, usize>> =
378 RefCell::new(init_ids()));
380 fn init_ids() -> FxHashMap<String, usize> {
396 ].into_iter().map(|id| (String::from(*id), 1)).collect()
399 /// This method resets the local table of used ID attributes. This is typically
400 /// used at the beginning of rendering an entire HTML page to reset from the
401 /// previous state (if any).
402 pub fn reset_ids(embedded: bool) {
403 USED_ID_MAP.with(|s| {
404 *s.borrow_mut() = if embedded {
412 pub fn derive_id(candidate: String) -> String {
413 USED_ID_MAP.with(|map| {
414 let id = match map.borrow_mut().get_mut(&candidate) {
417 let id = format!("{}-{}", candidate, *a);
423 map.borrow_mut().insert(id.clone(), 1);
428 /// Generates the documentation for `crate` into the directory `dst`
429 pub fn run(mut krate: clean::Crate,
430 external_html: &ExternalHtml,
431 playground_url: Option<String>,
433 passes: FxHashSet<String>,
434 css_file_extension: Option<PathBuf>,
435 renderinfo: RenderInfo) -> Result<(), Error> {
436 let src_root = match krate.src.parent() {
437 Some(p) => p.to_path_buf(),
438 None => PathBuf::new(),
440 let mut scx = SharedContext {
443 include_sources: true,
444 local_sources: FxHashMap(),
445 issue_tracker_base_url: None,
446 layout: layout::Layout {
447 logo: "".to_string(),
448 favicon: "".to_string(),
449 external_html: external_html.clone(),
450 krate: krate.name.clone(),
452 css_file_extension: css_file_extension.clone(),
455 // If user passed in `--playground-url` arg, we fill in crate name here
456 if let Some(url) = playground_url {
457 markdown::PLAYGROUND.with(|slot| {
458 *slot.borrow_mut() = Some((Some(krate.name.clone()), url));
462 // Crawl the crate attributes looking for attributes which control how we're
463 // going to emit HTML
464 if let Some(attrs) = krate.module.as_ref().map(|m| &m.attrs) {
465 for attr in attrs.lists("doc") {
466 let name = attr.name().map(|s| s.as_str());
467 match (name.as_ref().map(|s| &s[..]), attr.value_str()) {
468 (Some("html_favicon_url"), Some(s)) => {
469 scx.layout.favicon = s.to_string();
471 (Some("html_logo_url"), Some(s)) => {
472 scx.layout.logo = s.to_string();
474 (Some("html_playground_url"), Some(s)) => {
475 markdown::PLAYGROUND.with(|slot| {
476 let name = krate.name.clone();
477 *slot.borrow_mut() = Some((Some(name), s.to_string()));
480 (Some("issue_tracker_base_url"), Some(s)) => {
481 scx.issue_tracker_base_url = Some(s.to_string());
483 (Some("html_no_source"), None) if attr.is_word() => {
484 scx.include_sources = false;
490 try_err!(mkdir(&dst), &dst);
491 krate = render_sources(&dst, &mut scx, krate)?;
495 render_redirect_pages: false,
496 shared: Arc::new(scx),
499 // Crawl the crate to build various caches used for the output
508 let external_paths = external_paths.into_iter()
509 .map(|(k, (v, t))| (k, (v, ItemType::from(t))))
512 let mut cache = Cache {
514 external_paths: external_paths,
516 implementors: FxHashMap(),
518 parent_stack: Vec::new(),
519 search_index: Vec::new(),
520 parent_is_trait_impl: false,
521 extern_locations: FxHashMap(),
522 primitive_locations: FxHashMap(),
524 access_levels: krate.access_levels.clone(),
525 orphan_impl_items: Vec::new(),
526 traits: mem::replace(&mut krate.external_traits, FxHashMap()),
527 deref_trait_did: deref_trait_did,
528 deref_mut_trait_did: deref_mut_trait_did,
529 typarams: external_typarams,
532 // Cache where all our extern crates are located
533 for &(n, ref e) in &krate.externs {
534 let src_root = match Path::new(&e.src).parent() {
535 Some(p) => p.to_path_buf(),
536 None => PathBuf::new(),
538 cache.extern_locations.insert(n, (e.name.clone(), src_root,
539 extern_location(e, &cx.dst)));
541 let did = DefId { krate: n, index: CRATE_DEF_INDEX };
542 cache.external_paths.insert(did, (vec![e.name.to_string()], ItemType::Module));
545 // Cache where all known primitives have their documentation located.
547 // Favor linking to as local extern as possible, so iterate all crates in
548 // reverse topological order.
549 for &(_, ref e) in krate.externs.iter().rev() {
550 for &(def_id, prim, _) in &e.primitives {
551 cache.primitive_locations.insert(prim, def_id);
554 for &(def_id, prim, _) in &krate.primitives {
555 cache.primitive_locations.insert(prim, def_id);
558 cache.stack.push(krate.name.clone());
559 krate = cache.fold_crate(krate);
561 // Build our search index
562 let index = build_index(&krate, &mut cache);
564 // Freeze the cache now that the index has been built. Put an Arc into TLS
565 // for future parallelization opportunities
566 let cache = Arc::new(cache);
567 CACHE_KEY.with(|v| *v.borrow_mut() = cache.clone());
568 CURRENT_LOCATION_KEY.with(|s| s.borrow_mut().clear());
570 write_shared(&cx, &krate, &*cache, index)?;
572 // And finally render the whole crate's documentation
576 /// Build the search index from the collected metadata
577 fn build_index(krate: &clean::Crate, cache: &mut Cache) -> String {
578 let mut nodeid_to_pathid = FxHashMap();
579 let mut crate_items = Vec::with_capacity(cache.search_index.len());
580 let mut crate_paths = Vec::<Json>::new();
582 let Cache { ref mut search_index,
583 ref orphan_impl_items,
584 ref mut paths, .. } = *cache;
586 // Attach all orphan items to the type's definition if the type
587 // has since been learned.
588 for &(did, ref item) in orphan_impl_items {
589 if let Some(&(ref fqp, _)) = paths.get(&did) {
590 search_index.push(IndexItem {
592 name: item.name.clone().unwrap(),
593 path: fqp[..fqp.len() - 1].join("::"),
594 desc: plain_summary_line(item.doc_value()),
597 search_type: get_index_search_type(&item),
602 // Reduce `NodeId` in paths into smaller sequential numbers,
603 // and prune the paths that do not appear in the index.
604 let mut lastpath = String::new();
605 let mut lastpathid = 0usize;
607 for item in search_index {
608 item.parent_idx = item.parent.map(|nodeid| {
609 if nodeid_to_pathid.contains_key(&nodeid) {
610 *nodeid_to_pathid.get(&nodeid).unwrap()
612 let pathid = lastpathid;
613 nodeid_to_pathid.insert(nodeid, pathid);
616 let &(ref fqp, short) = paths.get(&nodeid).unwrap();
617 crate_paths.push(((short as usize), fqp.last().unwrap().clone()).to_json());
622 // Omit the parent path if it is same to that of the prior item.
623 if lastpath == item.path {
626 lastpath = item.path.clone();
628 crate_items.push(item.to_json());
631 let crate_doc = krate.module.as_ref().map(|module| {
632 plain_summary_line(module.doc_value())
633 }).unwrap_or(String::new());
635 let mut crate_data = BTreeMap::new();
636 crate_data.insert("doc".to_owned(), Json::String(crate_doc));
637 crate_data.insert("items".to_owned(), Json::Array(crate_items));
638 crate_data.insert("paths".to_owned(), Json::Array(crate_paths));
640 // Collect the index into a string
641 format!("searchIndex[{}] = {};",
642 as_json(&krate.name),
643 Json::Object(crate_data))
646 fn write_shared(cx: &Context,
647 krate: &clean::Crate,
649 search_index: String) -> Result<(), Error> {
650 // Write out the shared files. Note that these are shared among all rustdoc
651 // docs placed in the output directory, so this needs to be a synchronized
652 // operation with respect to all other rustdocs running around.
653 try_err!(mkdir(&cx.dst), &cx.dst);
654 let _lock = flock::Lock::panicking_new(&cx.dst.join(".lock"), true, true, true);
656 // Add all the static files. These may already exist, but we just
657 // overwrite them anyway to make sure that they're fresh and up-to-date.
659 write(cx.dst.join("jquery.js"),
660 include_bytes!("static/jquery-2.1.4.min.js"))?;
661 write(cx.dst.join("main.js"),
662 include_bytes!("static/main.js"))?;
663 write(cx.dst.join("rustdoc.css"),
664 include_bytes!("static/rustdoc.css"))?;
665 write(cx.dst.join("main.css"),
666 include_bytes!("static/styles/main.css"))?;
667 if let Some(ref css) = cx.shared.css_file_extension {
668 let mut content = String::new();
669 let css = css.as_path();
670 let mut f = try_err!(File::open(css), css);
672 try_err!(f.read_to_string(&mut content), css);
673 let css = cx.dst.join("theme.css");
674 let css = css.as_path();
675 let mut f = try_err!(File::create(css), css);
676 try_err!(write!(f, "{}", &content), css);
678 write(cx.dst.join("normalize.css"),
679 include_bytes!("static/normalize.css"))?;
680 write(cx.dst.join("FiraSans-Regular.woff"),
681 include_bytes!("static/FiraSans-Regular.woff"))?;
682 write(cx.dst.join("FiraSans-Medium.woff"),
683 include_bytes!("static/FiraSans-Medium.woff"))?;
684 write(cx.dst.join("FiraSans-LICENSE.txt"),
685 include_bytes!("static/FiraSans-LICENSE.txt"))?;
686 write(cx.dst.join("Heuristica-Italic.woff"),
687 include_bytes!("static/Heuristica-Italic.woff"))?;
688 write(cx.dst.join("Heuristica-LICENSE.txt"),
689 include_bytes!("static/Heuristica-LICENSE.txt"))?;
690 write(cx.dst.join("SourceSerifPro-Regular.woff"),
691 include_bytes!("static/SourceSerifPro-Regular.woff"))?;
692 write(cx.dst.join("SourceSerifPro-Bold.woff"),
693 include_bytes!("static/SourceSerifPro-Bold.woff"))?;
694 write(cx.dst.join("SourceSerifPro-LICENSE.txt"),
695 include_bytes!("static/SourceSerifPro-LICENSE.txt"))?;
696 write(cx.dst.join("SourceCodePro-Regular.woff"),
697 include_bytes!("static/SourceCodePro-Regular.woff"))?;
698 write(cx.dst.join("SourceCodePro-Semibold.woff"),
699 include_bytes!("static/SourceCodePro-Semibold.woff"))?;
700 write(cx.dst.join("SourceCodePro-LICENSE.txt"),
701 include_bytes!("static/SourceCodePro-LICENSE.txt"))?;
702 write(cx.dst.join("LICENSE-MIT.txt"),
703 include_bytes!("static/LICENSE-MIT.txt"))?;
704 write(cx.dst.join("LICENSE-APACHE.txt"),
705 include_bytes!("static/LICENSE-APACHE.txt"))?;
706 write(cx.dst.join("COPYRIGHT.txt"),
707 include_bytes!("static/COPYRIGHT.txt"))?;
709 fn collect(path: &Path, krate: &str,
710 key: &str) -> io::Result<Vec<String>> {
711 let mut ret = Vec::new();
713 for line in BufReader::new(File::open(path)?).lines() {
715 if !line.starts_with(key) {
718 if line.starts_with(&format!(r#"{}["{}"]"#, key, krate)) {
721 ret.push(line.to_string());
727 // Update the search index
728 let dst = cx.dst.join("search-index.js");
729 let mut all_indexes = try_err!(collect(&dst, &krate.name, "searchIndex"), &dst);
730 all_indexes.push(search_index);
731 // Sort the indexes by crate so the file will be generated identically even
732 // with rustdoc running in parallel.
734 let mut w = try_err!(File::create(&dst), &dst);
735 try_err!(writeln!(&mut w, "var searchIndex = {{}};"), &dst);
736 for index in &all_indexes {
737 try_err!(writeln!(&mut w, "{}", *index), &dst);
739 try_err!(writeln!(&mut w, "initSearch(searchIndex);"), &dst);
741 // Update the list of all implementors for traits
742 let dst = cx.dst.join("implementors");
743 for (&did, imps) in &cache.implementors {
744 // Private modules can leak through to this phase of rustdoc, which
745 // could contain implementations for otherwise private types. In some
746 // rare cases we could find an implementation for an item which wasn't
747 // indexed, so we just skip this step in that case.
749 // FIXME: this is a vague explanation for why this can't be a `get`, in
750 // theory it should be...
751 let &(ref remote_path, remote_item_type) = match cache.paths.get(&did) {
753 None => match cache.external_paths.get(&did) {
759 let mut implementors = format!(r#"implementors["{}"] = ["#, krate.name);
761 // If the trait and implementation are in the same crate, then
762 // there's no need to emit information about it (there's inlining
763 // going on). If they're in different crates then the crate defining
764 // the trait will be interested in our implementation.
765 if imp.def_id.krate == did.krate { continue }
766 write!(implementors, r#""{}","#, imp.impl_).unwrap();
768 implementors.push_str("];");
770 let mut mydst = dst.clone();
771 for part in &remote_path[..remote_path.len() - 1] {
774 try_err!(fs::create_dir_all(&mydst), &mydst);
775 mydst.push(&format!("{}.{}.js",
776 remote_item_type.css_class(),
777 remote_path[remote_path.len() - 1]));
779 let mut all_implementors = try_err!(collect(&mydst, &krate.name, "implementors"), &mydst);
780 all_implementors.push(implementors);
781 // Sort the implementors by crate so the file will be generated
782 // identically even with rustdoc running in parallel.
783 all_implementors.sort();
785 let mut f = try_err!(File::create(&mydst), &mydst);
786 try_err!(writeln!(&mut f, "(function() {{var implementors = {{}};"), &mydst);
787 for implementor in &all_implementors {
788 try_err!(writeln!(&mut f, "{}", *implementor), &mydst);
790 try_err!(writeln!(&mut f, "{}", r"
791 if (window.register_implementors) {
792 window.register_implementors(implementors);
794 window.pending_implementors = implementors;
797 try_err!(writeln!(&mut f, r"}})()"), &mydst);
802 fn render_sources(dst: &Path, scx: &mut SharedContext,
803 krate: clean::Crate) -> Result<clean::Crate, Error> {
804 info!("emitting source files");
805 let dst = dst.join("src");
806 try_err!(mkdir(&dst), &dst);
807 let dst = dst.join(&krate.name);
808 try_err!(mkdir(&dst), &dst);
809 let mut folder = SourceCollector {
813 Ok(folder.fold_crate(krate))
816 /// Writes the entire contents of a string to a destination, not attempting to
817 /// catch any errors.
818 fn write(dst: PathBuf, contents: &[u8]) -> Result<(), Error> {
819 Ok(try_err!(try_err!(File::create(&dst), &dst).write_all(contents), &dst))
822 /// Makes a directory on the filesystem, failing the thread if an error occurs
823 /// and skipping if the directory already exists.
825 /// Note that this also handles races as rustdoc is likely to be run
826 /// concurrently against another invocation.
827 fn mkdir(path: &Path) -> io::Result<()> {
828 match fs::create_dir(path) {
830 Err(ref e) if e.kind() == io::ErrorKind::AlreadyExists => Ok(()),
835 /// Takes a path to a source file and cleans the path to it. This canonicalizes
836 /// things like ".." to components which preserve the "top down" hierarchy of a
837 /// static HTML tree. Each component in the cleaned path will be passed as an
838 /// argument to `f`. The very last component of the path (ie the file name) will
839 /// be passed to `f` if `keep_filename` is true, and ignored otherwise.
840 // FIXME (#9639): The closure should deal with &[u8] instead of &str
841 // FIXME (#9639): This is too conservative, rejecting non-UTF-8 paths
842 fn clean_srcpath<F>(src_root: &Path, p: &Path, keep_filename: bool, mut f: F) where
845 // make it relative, if possible
846 let p = p.strip_prefix(src_root).unwrap_or(p);
848 let mut iter = p.components().peekable();
850 while let Some(c) = iter.next() {
851 if !keep_filename && iter.peek().is_none() {
856 Component::ParentDir => f("up"),
857 Component::Normal(c) => f(c.to_str().unwrap()),
863 /// Attempts to find where an external crate is located, given that we're
864 /// rendering in to the specified source destination.
865 fn extern_location(e: &clean::ExternalCrate, dst: &Path) -> ExternalLocation {
866 // See if there's documentation generated into the local directory
867 let local_location = dst.join(&e.name);
868 if local_location.is_dir() {
872 // Failing that, see if there's an attribute specifying where to find this
875 .filter(|a| a.check_name("html_root_url"))
876 .filter_map(|a| a.value_str())
878 let mut url = url.to_string();
879 if !url.ends_with("/") {
883 }).next().unwrap_or(Unknown) // Well, at least we tried.
886 impl<'a> DocFolder for SourceCollector<'a> {
887 fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
888 // If we're including source files, and we haven't seen this file yet,
889 // then we need to render it out to the filesystem.
890 if self.scx.include_sources
891 // skip all invalid spans
892 && item.source.filename != ""
893 // skip non-local items
894 && item.def_id.is_local()
895 // Macros from other libraries get special filenames which we can
897 && !(item.source.filename.starts_with("<")
898 && item.source.filename.ends_with("macros>")) {
900 // If it turns out that we couldn't read this file, then we probably
901 // can't read any of the files (generating html output from json or
902 // something like that), so just don't include sources for the
903 // entire crate. The other option is maintaining this mapping on a
904 // per-file basis, but that's probably not worth it...
906 .include_sources = match self.emit_source(&item.source.filename) {
909 println!("warning: source code was requested to be rendered, \
910 but processing `{}` had an error: {}",
911 item.source.filename, e);
912 println!(" skipping rendering of source code");
917 self.fold_item_recur(item)
921 impl<'a> SourceCollector<'a> {
922 /// Renders the given filename into its corresponding HTML source file.
923 fn emit_source(&mut self, filename: &str) -> io::Result<()> {
924 let p = PathBuf::from(filename);
925 if self.scx.local_sources.contains_key(&p) {
926 // We've already emitted this source
930 let mut contents = Vec::new();
931 File::open(&p).and_then(|mut f| f.read_to_end(&mut contents))?;
933 let contents = str::from_utf8(&contents).unwrap();
935 // Remove the utf-8 BOM if any
936 let contents = if contents.starts_with("\u{feff}") {
942 // Create the intermediate directories
943 let mut cur = self.dst.clone();
944 let mut root_path = String::from("../../");
945 let mut href = String::new();
946 clean_srcpath(&self.scx.src_root, &p, false, |component| {
948 mkdir(&cur).unwrap();
949 root_path.push_str("../");
950 href.push_str(component);
953 let mut fname = p.file_name().expect("source has no filename")
957 href.push_str(&fname.to_string_lossy());
959 let mut w = BufWriter::new(File::create(&cur)?);
960 let title = format!("{} -- source", cur.file_name().unwrap()
962 let desc = format!("Source to the Rust file `{}`.", filename);
963 let page = layout::Page {
966 root_path: &root_path,
968 keywords: BASIC_KEYWORDS,
970 layout::render(&mut w, &self.scx.layout,
971 &page, &(""), &Source(contents),
972 self.scx.css_file_extension.is_some())?;
974 self.scx.local_sources.insert(p, href);
979 impl DocFolder for Cache {
980 fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
981 // If this is a stripped module,
982 // we don't want it or its children in the search index.
983 let orig_stripped_mod = match item.inner {
984 clean::StrippedItem(box clean::ModuleItem(..)) => {
985 mem::replace(&mut self.stripped_mod, true)
987 _ => self.stripped_mod,
990 // Register any generics to their corresponding string. This is used
991 // when pretty-printing types.
992 if let Some(generics) = item.inner.generics() {
993 self.generics(generics);
996 // Propagate a trait method's documentation to all implementors of the
998 if let clean::TraitItem(ref t) = item.inner {
999 self.traits.entry(item.def_id).or_insert_with(|| t.clone());
1002 // Collect all the implementors of traits.
1003 if let clean::ImplItem(ref i) = item.inner {
1004 if let Some(did) = i.trait_.def_id() {
1005 self.implementors.entry(did).or_insert(vec![]).push(Implementor {
1006 def_id: item.def_id,
1007 stability: item.stability.clone(),
1013 // Index this method for searching later on.
1014 if let Some(ref s) = item.name {
1015 let (parent, is_inherent_impl_item) = match item.inner {
1016 clean::StrippedItem(..) => ((None, None), false),
1017 clean::AssociatedConstItem(..) |
1018 clean::TypedefItem(_, true) if self.parent_is_trait_impl => {
1019 // skip associated items in trait impls
1020 ((None, None), false)
1022 clean::AssociatedTypeItem(..) |
1023 clean::TyMethodItem(..) |
1024 clean::StructFieldItem(..) |
1025 clean::VariantItem(..) => {
1026 ((Some(*self.parent_stack.last().unwrap()),
1027 Some(&self.stack[..self.stack.len() - 1])),
1030 clean::MethodItem(..) | clean::AssociatedConstItem(..) => {
1031 if self.parent_stack.is_empty() {
1032 ((None, None), false)
1034 let last = self.parent_stack.last().unwrap();
1036 let path = match self.paths.get(&did) {
1037 // The current stack not necessarily has correlation
1038 // for where the type was defined. On the other
1039 // hand, `paths` always has the right
1040 // information if present.
1041 Some(&(ref fqp, ItemType::Trait)) |
1042 Some(&(ref fqp, ItemType::Struct)) |
1043 Some(&(ref fqp, ItemType::Union)) |
1044 Some(&(ref fqp, ItemType::Enum)) =>
1045 Some(&fqp[..fqp.len() - 1]),
1046 Some(..) => Some(&*self.stack),
1049 ((Some(*last), path), true)
1052 _ => ((None, Some(&*self.stack)), false)
1056 (parent, Some(path)) if is_inherent_impl_item || (!self.stripped_mod) => {
1057 debug_assert!(!item.is_stripped());
1059 // A crate has a module at its root, containing all items,
1060 // which should not be indexed. The crate-item itself is
1061 // inserted later on when serializing the search-index.
1062 if item.def_id.index != CRATE_DEF_INDEX {
1063 self.search_index.push(IndexItem {
1065 name: s.to_string(),
1066 path: path.join("::").to_string(),
1067 desc: plain_summary_line(item.doc_value()),
1070 search_type: get_index_search_type(&item),
1074 (Some(parent), None) if is_inherent_impl_item => {
1075 // We have a parent, but we don't know where they're
1076 // defined yet. Wait for later to index this item.
1077 self.orphan_impl_items.push((parent, item.clone()));
1083 // Keep track of the fully qualified path for this item.
1084 let pushed = match item.name {
1085 Some(ref n) if !n.is_empty() => {
1086 self.stack.push(n.to_string());
1093 clean::StructItem(..) | clean::EnumItem(..) |
1094 clean::TypedefItem(..) | clean::TraitItem(..) |
1095 clean::FunctionItem(..) | clean::ModuleItem(..) |
1096 clean::ForeignFunctionItem(..) | clean::ForeignStaticItem(..) |
1097 clean::ConstantItem(..) | clean::StaticItem(..) |
1098 clean::UnionItem(..)
1099 if !self.stripped_mod => {
1100 // Reexported items mean that the same id can show up twice
1101 // in the rustdoc ast that we're looking at. We know,
1102 // however, that a reexported item doesn't show up in the
1103 // `public_items` map, so we can skip inserting into the
1104 // paths map if there was already an entry present and we're
1105 // not a public item.
1107 !self.paths.contains_key(&item.def_id) ||
1108 self.access_levels.is_public(item.def_id)
1110 self.paths.insert(item.def_id,
1111 (self.stack.clone(), item.type_()));
1114 // Link variants to their parent enum because pages aren't emitted
1115 // for each variant.
1116 clean::VariantItem(..) if !self.stripped_mod => {
1117 let mut stack = self.stack.clone();
1119 self.paths.insert(item.def_id, (stack, ItemType::Enum));
1122 clean::PrimitiveItem(..) if item.visibility.is_some() => {
1123 self.paths.insert(item.def_id, (self.stack.clone(),
1130 // Maintain the parent stack
1131 let orig_parent_is_trait_impl = self.parent_is_trait_impl;
1132 let parent_pushed = match item.inner {
1133 clean::TraitItem(..) | clean::EnumItem(..) |
1134 clean::StructItem(..) | clean::UnionItem(..) => {
1135 self.parent_stack.push(item.def_id);
1136 self.parent_is_trait_impl = false;
1139 clean::ImplItem(ref i) => {
1140 self.parent_is_trait_impl = i.trait_.is_some();
1142 clean::ResolvedPath{ did, .. } => {
1143 self.parent_stack.push(did);
1147 let prim_did = t.primitive_type().and_then(|t| {
1148 self.primitive_locations.get(&t).cloned()
1152 self.parent_stack.push(did);
1163 // Once we've recursively found all the generics, hoard off all the
1164 // implementations elsewhere.
1165 let ret = self.fold_item_recur(item).and_then(|item| {
1166 if let clean::Item { inner: clean::ImplItem(_), .. } = item {
1167 // Figure out the id of this impl. This may map to a
1168 // primitive rather than always to a struct/enum.
1169 // Note: matching twice to restrict the lifetime of the `i` borrow.
1170 let did = if let clean::Item { inner: clean::ImplItem(ref i), .. } = item {
1172 clean::ResolvedPath { did, .. } |
1173 clean::BorrowedRef {
1174 type_: box clean::ResolvedPath { did, .. }, ..
1179 t.primitive_type().and_then(|t| {
1180 self.primitive_locations.get(&t).cloned()
1187 if let Some(did) = did {
1188 self.impls.entry(did).or_insert(vec![]).push(Impl {
1198 if pushed { self.stack.pop().unwrap(); }
1199 if parent_pushed { self.parent_stack.pop().unwrap(); }
1200 self.stripped_mod = orig_stripped_mod;
1201 self.parent_is_trait_impl = orig_parent_is_trait_impl;
1207 fn generics(&mut self, generics: &clean::Generics) {
1208 for typ in &generics.type_params {
1209 self.typarams.insert(typ.did, typ.name.clone());
1215 /// String representation of how to get back to the root path of the 'doc/'
1216 /// folder in terms of a relative URL.
1217 fn root_path(&self) -> String {
1218 repeat("../").take(self.current.len()).collect::<String>()
1221 /// Recurse in the directory structure and change the "root path" to make
1222 /// sure it always points to the top (relatively).
1223 fn recurse<T, F>(&mut self, s: String, f: F) -> T where
1224 F: FnOnce(&mut Context) -> T,
1227 panic!("Unexpected empty destination: {:?}", self.current);
1229 let prev = self.dst.clone();
1231 self.current.push(s);
1233 info!("Recursing into {}", self.dst.display());
1237 info!("Recursed; leaving {}", self.dst.display());
1239 // Go back to where we were at
1241 self.current.pop().unwrap();
1246 /// Main method for rendering a crate.
1248 /// This currently isn't parallelized, but it'd be pretty easy to add
1249 /// parallelization to this function.
1250 fn krate(self, mut krate: clean::Crate) -> Result<(), Error> {
1251 let mut item = match krate.module.take() {
1253 None => return Ok(()),
1255 item.name = Some(krate.name);
1257 // Render the crate documentation
1258 let mut work = vec![(self, item)];
1260 while let Some((mut cx, item)) = work.pop() {
1261 cx.item(item, |cx, item| {
1262 work.push((cx.clone(), item))
1268 fn render_item(&self,
1269 writer: &mut io::Write,
1273 // A little unfortunate that this is done like this, but it sure
1274 // does make formatting *a lot* nicer.
1275 CURRENT_LOCATION_KEY.with(|slot| {
1276 *slot.borrow_mut() = self.current.clone();
1279 let mut title = if it.is_primitive() {
1280 // No need to include the namespace for primitive types
1283 self.current.join("::")
1286 if !title.is_empty() {
1287 title.push_str("::");
1289 title.push_str(it.name.as_ref().unwrap());
1291 title.push_str(" - Rust");
1292 let tyname = it.type_().css_class();
1293 let desc = if it.is_crate() {
1294 format!("API documentation for the Rust `{}` crate.",
1295 self.shared.layout.krate)
1297 format!("API documentation for the Rust `{}` {} in crate `{}`.",
1298 it.name.as_ref().unwrap(), tyname, self.shared.layout.krate)
1300 let keywords = make_item_keywords(it);
1301 let page = layout::Page {
1303 root_path: &self.root_path(),
1306 keywords: &keywords,
1311 if !self.render_redirect_pages {
1312 layout::render(writer, &self.shared.layout, &page,
1313 &Sidebar{ cx: self, item: it },
1314 &Item{ cx: self, item: it },
1315 self.shared.css_file_extension.is_some())?;
1317 let mut url = self.root_path();
1318 if let Some(&(ref names, ty)) = cache().paths.get(&it.def_id) {
1319 for name in &names[..names.len() - 1] {
1323 url.push_str(&item_path(ty, names.last().unwrap()));
1324 layout::redirect(writer, &url)?;
1330 /// Non-parallelized version of rendering an item. This will take the input
1331 /// item, render its contents, and then invoke the specified closure with
1332 /// all sub-items which need to be rendered.
1334 /// The rendering driver uses this closure to queue up more work.
1335 fn item<F>(&mut self, item: clean::Item, mut f: F) -> Result<(), Error> where
1336 F: FnMut(&mut Context, clean::Item),
1338 // Stripped modules survive the rustdoc passes (i.e. `strip-private`)
1339 // if they contain impls for public types. These modules can also
1340 // contain items such as publicly reexported structures.
1342 // External crates will provide links to these structures, so
1343 // these modules are recursed into, but not rendered normally
1344 // (a flag on the context).
1345 if !self.render_redirect_pages {
1346 self.render_redirect_pages = maybe_ignore_item(&item);
1350 // modules are special because they add a namespace. We also need to
1351 // recurse into the items of the module as well.
1352 let name = item.name.as_ref().unwrap().to_string();
1353 let mut item = Some(item);
1354 self.recurse(name, |this| {
1355 let item = item.take().unwrap();
1357 let mut buf = Vec::new();
1358 this.render_item(&mut buf, &item, false).unwrap();
1359 // buf will be empty if the module is stripped and there is no redirect for it
1360 if !buf.is_empty() {
1361 let joint_dst = this.dst.join("index.html");
1362 try_err!(fs::create_dir_all(&this.dst), &this.dst);
1363 let mut dst = try_err!(File::create(&joint_dst), &joint_dst);
1364 try_err!(dst.write_all(&buf), &joint_dst);
1367 let m = match item.inner {
1368 clean::StrippedItem(box clean::ModuleItem(m)) |
1369 clean::ModuleItem(m) => m,
1373 // Render sidebar-items.js used throughout this module.
1374 if !this.render_redirect_pages {
1375 let items = this.build_sidebar_items(&m);
1376 let js_dst = this.dst.join("sidebar-items.js");
1377 let mut js_out = BufWriter::new(try_err!(File::create(&js_dst), &js_dst));
1378 try_err!(write!(&mut js_out, "initSidebarItems({});",
1379 as_json(&items)), &js_dst);
1382 for item in m.items {
1388 } else if item.name.is_some() {
1389 let mut buf = Vec::new();
1390 self.render_item(&mut buf, &item, true).unwrap();
1391 // buf will be empty if the item is stripped and there is no redirect for it
1392 if !buf.is_empty() {
1393 let name = item.name.as_ref().unwrap();
1394 let item_type = item.type_();
1395 let file_name = &item_path(item_type, name);
1396 let joint_dst = self.dst.join(file_name);
1397 try_err!(fs::create_dir_all(&self.dst), &self.dst);
1398 let mut dst = try_err!(File::create(&joint_dst), &joint_dst);
1399 try_err!(dst.write_all(&buf), &joint_dst);
1401 // Redirect from a sane URL using the namespace to Rustdoc's
1402 // URL for the page.
1403 let redir_name = format!("{}.{}.html", name, item_type.name_space());
1404 let redir_dst = self.dst.join(redir_name);
1405 if let Ok(mut redirect_out) = OpenOptions::new().create_new(true)
1408 try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
1411 // If the item is a macro, redirect from the old macro URL (with !)
1412 // to the new one (without).
1413 // FIXME(#35705) remove this redirect.
1414 if item_type == ItemType::Macro {
1415 let redir_name = format!("{}.{}!.html", item_type, name);
1416 let redir_dst = self.dst.join(redir_name);
1417 let mut redirect_out = try_err!(File::create(&redir_dst), &redir_dst);
1418 try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
1425 fn build_sidebar_items(&self, m: &clean::Module) -> BTreeMap<String, Vec<NameDoc>> {
1426 // BTreeMap instead of HashMap to get a sorted output
1427 let mut map = BTreeMap::new();
1428 for item in &m.items {
1429 if maybe_ignore_item(item) { continue }
1431 let short = item.type_().css_class();
1432 let myname = match item.name {
1434 Some(ref s) => s.to_string(),
1436 let short = short.to_string();
1437 map.entry(short).or_insert(vec![])
1438 .push((myname, Some(plain_summary_line(item.doc_value()))));
1441 for (_, items) in &mut map {
1449 /// Generate a url appropriate for an `href` attribute back to the source of
1452 /// The url generated, when clicked, will redirect the browser back to the
1453 /// original source code.
1455 /// If `None` is returned, then a source link couldn't be generated. This
1456 /// may happen, for example, with externally inlined items where the source
1457 /// of their crate documentation isn't known.
1458 fn src_href(&self) -> Option<String> {
1459 let mut root = self.cx.root_path();
1461 let cache = cache();
1462 let mut path = String::new();
1463 let (krate, path) = if self.item.def_id.is_local() {
1464 let path = PathBuf::from(&self.item.source.filename);
1465 if let Some(path) = self.cx.shared.local_sources.get(&path) {
1466 (&self.cx.shared.layout.krate, path)
1471 // Macros from other libraries get special filenames which we can
1473 if self.item.source.filename.starts_with("<") &&
1474 self.item.source.filename.ends_with("macros>") {
1478 let (krate, src_root) = match cache.extern_locations.get(&self.item.def_id.krate) {
1479 Some(&(ref name, ref src, Local)) => (name, src),
1480 Some(&(ref name, ref src, Remote(ref s))) => {
1481 root = s.to_string();
1484 Some(&(_, _, Unknown)) | None => return None,
1487 let file = Path::new(&self.item.source.filename);
1488 clean_srcpath(&src_root, file, false, |component| {
1489 path.push_str(component);
1492 let mut fname = file.file_name().expect("source has no filename")
1494 fname.push(".html");
1495 path.push_str(&fname.to_string_lossy());
1499 let lines = if self.item.source.loline == self.item.source.hiline {
1500 format!("{}", self.item.source.loline)
1502 format!("{}-{}", self.item.source.loline, self.item.source.hiline)
1504 Some(format!("{root}src/{krate}/{path}#{lines}",
1512 impl<'a> fmt::Display for Item<'a> {
1513 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
1514 debug_assert!(!self.item.is_stripped());
1515 // Write the breadcrumb trail header for the top
1516 write!(fmt, "\n<h1 class='fqn'><span class='in-band'>")?;
1517 match self.item.inner {
1518 clean::ModuleItem(ref m) => if m.is_crate {
1519 write!(fmt, "Crate ")?;
1521 write!(fmt, "Module ")?;
1523 clean::FunctionItem(..) | clean::ForeignFunctionItem(..) =>
1524 write!(fmt, "Function ")?,
1525 clean::TraitItem(..) => write!(fmt, "Trait ")?,
1526 clean::StructItem(..) => write!(fmt, "Struct ")?,
1527 clean::UnionItem(..) => write!(fmt, "Union ")?,
1528 clean::EnumItem(..) => write!(fmt, "Enum ")?,
1529 clean::TypedefItem(..) => write!(fmt, "Type Definition ")?,
1530 clean::MacroItem(..) => write!(fmt, "Macro ")?,
1531 clean::PrimitiveItem(..) => write!(fmt, "Primitive Type ")?,
1532 clean::StaticItem(..) | clean::ForeignStaticItem(..) =>
1533 write!(fmt, "Static ")?,
1534 clean::ConstantItem(..) => write!(fmt, "Constant ")?,
1536 // We don't generate pages for any other type.
1540 if !self.item.is_primitive() {
1541 let cur = &self.cx.current;
1542 let amt = if self.item.is_mod() { cur.len() - 1 } else { cur.len() };
1543 for (i, component) in cur.iter().enumerate().take(amt) {
1544 write!(fmt, "<a href='{}index.html'>{}</a>::<wbr>",
1545 repeat("../").take(cur.len() - i - 1)
1546 .collect::<String>(),
1550 write!(fmt, "<a class='{}' href=''>{}</a>",
1551 self.item.type_(), self.item.name.as_ref().unwrap())?;
1553 write!(fmt, "</span>")?; // in-band
1554 write!(fmt, "<span class='out-of-band'>")?;
1555 if let Some(version) = self.item.stable_since() {
1556 write!(fmt, "<span class='since' title='Stable since Rust version {0}'>{0}</span>",
1560 r##"<span id='render-detail'>
1561 <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
1562 [<span class='inner'>−</span>]
1568 // When this item is part of a `pub use` in a downstream crate, the
1569 // [src] link in the downstream documentation will actually come back to
1570 // this page, and this link will be auto-clicked. The `id` attribute is
1571 // used to find the link to auto-click.
1572 if self.cx.shared.include_sources && !self.item.is_primitive() {
1573 if let Some(l) = self.src_href() {
1574 write!(fmt, "<a class='srclink' href='{}' title='{}'>[src]</a>",
1575 l, "goto source code")?;
1579 write!(fmt, "</span>")?; // out-of-band
1581 write!(fmt, "</h1>\n")?;
1583 match self.item.inner {
1584 clean::ModuleItem(ref m) => {
1585 item_module(fmt, self.cx, self.item, &m.items)
1587 clean::FunctionItem(ref f) | clean::ForeignFunctionItem(ref f) =>
1588 item_function(fmt, self.cx, self.item, f),
1589 clean::TraitItem(ref t) => item_trait(fmt, self.cx, self.item, t),
1590 clean::StructItem(ref s) => item_struct(fmt, self.cx, self.item, s),
1591 clean::UnionItem(ref s) => item_union(fmt, self.cx, self.item, s),
1592 clean::EnumItem(ref e) => item_enum(fmt, self.cx, self.item, e),
1593 clean::TypedefItem(ref t, _) => item_typedef(fmt, self.cx, self.item, t),
1594 clean::MacroItem(ref m) => item_macro(fmt, self.cx, self.item, m),
1595 clean::PrimitiveItem(ref p) => item_primitive(fmt, self.cx, self.item, p),
1596 clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) =>
1597 item_static(fmt, self.cx, self.item, i),
1598 clean::ConstantItem(ref c) => item_constant(fmt, self.cx, self.item, c),
1600 // We don't generate pages for any other type.
1607 fn item_path(ty: ItemType, name: &str) -> String {
1609 ItemType::Module => format!("{}/index.html", name),
1610 _ => format!("{}.{}.html", ty.css_class(), name),
1614 fn full_path(cx: &Context, item: &clean::Item) -> String {
1615 let mut s = cx.current.join("::");
1617 s.push_str(item.name.as_ref().unwrap());
1621 fn shorter<'a>(s: Option<&'a str>) -> String {
1623 Some(s) => s.lines().take_while(|line|{
1624 (*line).chars().any(|chr|{
1625 !chr.is_whitespace()
1627 }).collect::<Vec<_>>().join("\n"),
1628 None => "".to_string()
1633 fn plain_summary_line(s: Option<&str>) -> String {
1634 let line = shorter(s).replace("\n", " ");
1635 markdown::plain_summary_line(&line[..])
1638 fn document(w: &mut fmt::Formatter, cx: &Context, item: &clean::Item) -> fmt::Result {
1639 document_stability(w, cx, item)?;
1640 document_full(w, item)?;
1644 fn document_short(w: &mut fmt::Formatter, item: &clean::Item, link: AssocItemLink) -> fmt::Result {
1645 if let Some(s) = item.doc_value() {
1646 let markdown = if s.contains('\n') {
1647 format!("{} [Read more]({})",
1648 &plain_summary_line(Some(s)), naive_assoc_href(item, link))
1650 format!("{}", &plain_summary_line(Some(s)))
1652 write!(w, "<div class='docblock'>{}</div>", Markdown(&markdown))?;
1657 fn document_full(w: &mut fmt::Formatter, item: &clean::Item) -> fmt::Result {
1658 if let Some(s) = item.doc_value() {
1659 write!(w, "<div class='docblock'>{}</div>", Markdown(s))?;
1664 fn document_stability(w: &mut fmt::Formatter, cx: &Context, item: &clean::Item) -> fmt::Result {
1665 let stabilities = short_stability(item, cx, true);
1666 if !stabilities.is_empty() {
1667 write!(w, "<div class='stability'>")?;
1668 for stability in stabilities {
1669 write!(w, "{}", stability)?;
1671 write!(w, "</div>")?;
1676 fn item_module(w: &mut fmt::Formatter, cx: &Context,
1677 item: &clean::Item, items: &[clean::Item]) -> fmt::Result {
1678 document(w, cx, item)?;
1680 let mut indices = (0..items.len()).filter(|i| {
1681 if let clean::DefaultImplItem(..) = items[*i].inner {
1684 !maybe_ignore_item(&items[*i])
1685 }).collect::<Vec<usize>>();
1687 // the order of item types in the listing
1688 fn reorder(ty: ItemType) -> u8 {
1690 ItemType::ExternCrate => 0,
1691 ItemType::Import => 1,
1692 ItemType::Primitive => 2,
1693 ItemType::Module => 3,
1694 ItemType::Macro => 4,
1695 ItemType::Struct => 5,
1696 ItemType::Enum => 6,
1697 ItemType::Constant => 7,
1698 ItemType::Static => 8,
1699 ItemType::Trait => 9,
1700 ItemType::Function => 10,
1701 ItemType::Typedef => 12,
1702 ItemType::Union => 13,
1707 fn cmp(i1: &clean::Item, i2: &clean::Item, idx1: usize, idx2: usize) -> Ordering {
1708 let ty1 = i1.type_();
1709 let ty2 = i2.type_();
1711 return (reorder(ty1), idx1).cmp(&(reorder(ty2), idx2))
1713 let s1 = i1.stability.as_ref().map(|s| s.level);
1714 let s2 = i2.stability.as_ref().map(|s| s.level);
1716 (Some(stability::Unstable), Some(stability::Stable)) => return Ordering::Greater,
1717 (Some(stability::Stable), Some(stability::Unstable)) => return Ordering::Less,
1720 i1.name.cmp(&i2.name)
1723 indices.sort_by(|&i1, &i2| cmp(&items[i1], &items[i2], i1, i2));
1725 debug!("{:?}", indices);
1726 let mut curty = None;
1727 for &idx in &indices {
1728 let myitem = &items[idx];
1729 if myitem.is_stripped() {
1733 let myty = Some(myitem.type_());
1734 if curty == Some(ItemType::ExternCrate) && myty == Some(ItemType::Import) {
1735 // Put `extern crate` and `use` re-exports in the same section.
1737 } else if myty != curty {
1738 if curty.is_some() {
1739 write!(w, "</table>")?;
1742 let (short, name) = match myty.unwrap() {
1743 ItemType::ExternCrate |
1744 ItemType::Import => ("reexports", "Reexports"),
1745 ItemType::Module => ("modules", "Modules"),
1746 ItemType::Struct => ("structs", "Structs"),
1747 ItemType::Union => ("unions", "Unions"),
1748 ItemType::Enum => ("enums", "Enums"),
1749 ItemType::Function => ("functions", "Functions"),
1750 ItemType::Typedef => ("types", "Type Definitions"),
1751 ItemType::Static => ("statics", "Statics"),
1752 ItemType::Constant => ("constants", "Constants"),
1753 ItemType::Trait => ("traits", "Traits"),
1754 ItemType::Impl => ("impls", "Implementations"),
1755 ItemType::TyMethod => ("tymethods", "Type Methods"),
1756 ItemType::Method => ("methods", "Methods"),
1757 ItemType::StructField => ("fields", "Struct Fields"),
1758 ItemType::Variant => ("variants", "Variants"),
1759 ItemType::Macro => ("macros", "Macros"),
1760 ItemType::Primitive => ("primitives", "Primitive Types"),
1761 ItemType::AssociatedType => ("associated-types", "Associated Types"),
1762 ItemType::AssociatedConst => ("associated-consts", "Associated Constants"),
1764 write!(w, "<h2 id='{id}' class='section-header'>\
1765 <a href=\"#{id}\">{name}</a></h2>\n<table>",
1766 id = derive_id(short.to_owned()), name = name)?;
1769 match myitem.inner {
1770 clean::ExternCrateItem(ref name, ref src) => {
1771 use html::format::HRef;
1775 write!(w, "<tr><td><code>{}extern crate {} as {};",
1776 VisSpace(&myitem.visibility),
1777 HRef::new(myitem.def_id, src),
1781 write!(w, "<tr><td><code>{}extern crate {};",
1782 VisSpace(&myitem.visibility),
1783 HRef::new(myitem.def_id, name))?
1786 write!(w, "</code></td></tr>")?;
1789 clean::ImportItem(ref import) => {
1790 write!(w, "<tr><td><code>{}{}</code></td></tr>",
1791 VisSpace(&myitem.visibility), *import)?;
1795 if myitem.name.is_none() { continue }
1797 let stabilities = short_stability(myitem, cx, false);
1799 let stab_docs = if !stabilities.is_empty() {
1801 .map(|s| format!("[{}]", s))
1802 .collect::<Vec<_>>()
1809 let unsafety_flag = match myitem.inner {
1810 clean::FunctionItem(ref func) | clean::ForeignFunctionItem(ref func)
1811 if func.unsafety == hir::Unsafety::Unsafe => {
1812 "<a title='unsafe function' href='#'><sup>âš </sup></a>"
1817 let doc_value = myitem.doc_value().unwrap_or("");
1819 <tr class='{stab} module-item'>
1820 <td><a class='{class}' href='{href}'
1821 title='{title}'>{name}</a>{unsafety_flag}</td>
1822 <td class='docblock-short'>
1826 name = *myitem.name.as_ref().unwrap(),
1827 stab_docs = stab_docs,
1828 docs = shorter(Some(&Markdown(doc_value).to_string())),
1829 class = myitem.type_(),
1830 stab = myitem.stability_class(),
1831 unsafety_flag = unsafety_flag,
1832 href = item_path(myitem.type_(), myitem.name.as_ref().unwrap()),
1833 title = full_path(cx, myitem))?;
1838 if curty.is_some() {
1839 write!(w, "</table>")?;
1844 fn maybe_ignore_item(it: &clean::Item) -> bool {
1846 clean::StrippedItem(..) => true,
1847 clean::ModuleItem(ref m) => {
1848 it.doc_value().is_none() && m.items.is_empty()
1849 && it.visibility != Some(clean::Public)
1855 fn short_stability(item: &clean::Item, cx: &Context, show_reason: bool) -> Vec<String> {
1856 let mut stability = vec![];
1858 if let Some(stab) = item.stability.as_ref() {
1859 let deprecated_reason = if show_reason && !stab.deprecated_reason.is_empty() {
1860 format!(": {}", stab.deprecated_reason)
1864 if !stab.deprecated_since.is_empty() {
1865 let since = if show_reason {
1866 format!(" since {}", Escape(&stab.deprecated_since))
1870 let text = format!("Deprecated{}{}", since, MarkdownHtml(&deprecated_reason));
1871 stability.push(format!("<div class='stab deprecated'>{}</div>", text))
1874 if stab.level == stability::Unstable {
1876 let unstable_extra = match (!stab.feature.is_empty(),
1877 &cx.shared.issue_tracker_base_url,
1879 (true, &Some(ref tracker_url), Some(issue_no)) if issue_no > 0 =>
1880 format!(" (<code>{}</code> <a href=\"{}{}\">#{}</a>)",
1881 Escape(&stab.feature), tracker_url, issue_no, issue_no),
1882 (false, &Some(ref tracker_url), Some(issue_no)) if issue_no > 0 =>
1883 format!(" (<a href=\"{}{}\">#{}</a>)", Escape(&tracker_url), issue_no,
1886 format!(" (<code>{}</code>)", Escape(&stab.feature)),
1889 if stab.unstable_reason.is_empty() {
1890 stability.push(format!("<div class='stab unstable'>\
1891 <span class=microscope>🔬</span> \
1892 This is a nightly-only experimental API. {}\
1896 let text = format!("<summary><span class=microscope>🔬</span> \
1897 This is a nightly-only experimental API. {}\
1899 unstable_extra, MarkdownHtml(&stab.unstable_reason));
1900 stability.push(format!("<div class='stab unstable'><details>{}</details></div>",
1904 stability.push(format!("<div class='stab unstable'>Experimental</div>"))
1907 } else if let Some(depr) = item.deprecation.as_ref() {
1908 let note = if show_reason && !depr.note.is_empty() {
1909 format!(": {}", depr.note)
1913 let since = if show_reason && !depr.since.is_empty() {
1914 format!(" since {}", Escape(&depr.since))
1919 let text = format!("Deprecated{}{}", since, MarkdownHtml(¬e));
1920 stability.push(format!("<div class='stab deprecated'>{}</div>", text))
1926 struct Initializer<'a>(&'a str);
1928 impl<'a> fmt::Display for Initializer<'a> {
1929 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
1930 let Initializer(s) = *self;
1931 if s.is_empty() { return Ok(()); }
1932 write!(f, "<code> = </code>")?;
1933 write!(f, "<code>{}</code>", Escape(s))
1937 fn item_constant(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
1938 c: &clean::Constant) -> fmt::Result {
1939 write!(w, "<pre class='rust const'>{vis}const \
1940 {name}: {typ}{init}</pre>",
1941 vis = VisSpace(&it.visibility),
1942 name = it.name.as_ref().unwrap(),
1944 init = Initializer(&c.expr))?;
1948 fn item_static(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
1949 s: &clean::Static) -> fmt::Result {
1950 write!(w, "<pre class='rust static'>{vis}static {mutability}\
1951 {name}: {typ}{init}</pre>",
1952 vis = VisSpace(&it.visibility),
1953 mutability = MutableSpace(s.mutability),
1954 name = it.name.as_ref().unwrap(),
1956 init = Initializer(&s.expr))?;
1960 fn item_function(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
1961 f: &clean::Function) -> fmt::Result {
1962 // FIXME(#24111): remove when `const_fn` is stabilized
1963 let vis_constness = match UnstableFeatures::from_environment() {
1964 UnstableFeatures::Allow => f.constness,
1965 _ => hir::Constness::NotConst
1967 let indent = format!("{}{}{}{:#}fn {}{:#}",
1968 VisSpace(&it.visibility),
1969 ConstnessSpace(vis_constness),
1970 UnsafetySpace(f.unsafety),
1972 it.name.as_ref().unwrap(),
1974 write!(w, "<pre class='rust fn'>{vis}{constness}{unsafety}{abi}fn \
1975 {name}{generics}{decl}{where_clause}</pre>",
1976 vis = VisSpace(&it.visibility),
1977 constness = ConstnessSpace(vis_constness),
1978 unsafety = UnsafetySpace(f.unsafety),
1979 abi = AbiSpace(f.abi),
1980 name = it.name.as_ref().unwrap(),
1981 generics = f.generics,
1982 where_clause = WhereClause(&f.generics, 2),
1983 decl = Method(&f.decl, indent))?;
1987 fn item_trait(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
1988 t: &clean::Trait) -> fmt::Result {
1989 let mut bounds = String::new();
1990 let mut bounds_plain = String::new();
1991 if !t.bounds.is_empty() {
1992 if !bounds.is_empty() {
1994 bounds_plain.push(' ');
1996 bounds.push_str(": ");
1997 bounds_plain.push_str(": ");
1998 for (i, p) in t.bounds.iter().enumerate() {
2000 bounds.push_str(" + ");
2001 bounds_plain.push_str(" + ");
2003 bounds.push_str(&format!("{}", *p));
2004 bounds_plain.push_str(&format!("{:#}", *p));
2008 // Output the trait definition
2009 write!(w, "<pre class='rust trait'>{}{}trait {}{}{}{} ",
2010 VisSpace(&it.visibility),
2011 UnsafetySpace(t.unsafety),
2012 it.name.as_ref().unwrap(),
2015 // Where clauses in traits are indented nine spaces, per rustdoc.css
2016 WhereClause(&t.generics, 9))?;
2018 let types = t.items.iter().filter(|m| m.is_associated_type()).collect::<Vec<_>>();
2019 let consts = t.items.iter().filter(|m| m.is_associated_const()).collect::<Vec<_>>();
2020 let required = t.items.iter().filter(|m| m.is_ty_method()).collect::<Vec<_>>();
2021 let provided = t.items.iter().filter(|m| m.is_method()).collect::<Vec<_>>();
2023 if t.items.is_empty() {
2024 write!(w, "{{ }}")?;
2026 // FIXME: we should be using a derived_id for the Anchors here
2030 render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait)?;
2033 if !types.is_empty() && !consts.is_empty() {
2038 render_assoc_item(w, t, AssocItemLink::Anchor(None), ItemType::Trait)?;
2041 if !consts.is_empty() && !required.is_empty() {
2044 for m in &required {
2046 render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait)?;
2049 if !required.is_empty() && !provided.is_empty() {
2052 for m in &provided {
2054 render_assoc_item(w, m, AssocItemLink::Anchor(None), ItemType::Trait)?;
2055 write!(w, " {{ ... }}\n")?;
2059 write!(w, "</pre>")?;
2061 // Trait documentation
2062 document(w, cx, it)?;
2064 fn trait_item(w: &mut fmt::Formatter, cx: &Context, m: &clean::Item, t: &clean::Item)
2066 let name = m.name.as_ref().unwrap();
2067 let item_type = m.type_();
2068 let id = derive_id(format!("{}.{}", item_type, name));
2069 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2070 write!(w, "<h3 id='{id}' class='method'>\
2071 <span id='{ns_id}' class='invisible'><code>",
2074 render_assoc_item(w, m, AssocItemLink::Anchor(Some(&id)), ItemType::Impl)?;
2075 write!(w, "</code>")?;
2076 render_stability_since(w, m, t)?;
2077 write!(w, "</span></h3>")?;
2078 document(w, cx, m)?;
2082 if !types.is_empty() {
2084 <h2 id='associated-types'>Associated Types</h2>
2085 <div class='methods'>
2088 trait_item(w, cx, *t, it)?;
2090 write!(w, "</div>")?;
2093 if !consts.is_empty() {
2095 <h2 id='associated-const'>Associated Constants</h2>
2096 <div class='methods'>
2099 trait_item(w, cx, *t, it)?;
2101 write!(w, "</div>")?;
2104 // Output the documentation for each function individually
2105 if !required.is_empty() {
2107 <h2 id='required-methods'>Required Methods</h2>
2108 <div class='methods'>
2110 for m in &required {
2111 trait_item(w, cx, *m, it)?;
2113 write!(w, "</div>")?;
2115 if !provided.is_empty() {
2117 <h2 id='provided-methods'>Provided Methods</h2>
2118 <div class='methods'>
2120 for m in &provided {
2121 trait_item(w, cx, *m, it)?;
2123 write!(w, "</div>")?;
2126 // If there are methods directly on this trait object, render them here.
2127 render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)?;
2129 let cache = cache();
2131 <h2 id='implementors'>Implementors</h2>
2132 <ul class='item-list' id='implementors-list'>
2134 if let Some(implementors) = cache.implementors.get(&it.def_id) {
2135 // The DefId is for the first Type found with that name. The bool is
2136 // if any Types with the same name but different DefId have been found.
2137 let mut implementor_dups: FxHashMap<&str, (DefId, bool)> = FxHashMap();
2138 for implementor in implementors {
2139 match implementor.impl_.for_ {
2140 clean::ResolvedPath { ref path, did, is_generic: false, .. } |
2141 clean::BorrowedRef {
2142 type_: box clean::ResolvedPath { ref path, did, is_generic: false, .. },
2145 let &mut (prev_did, ref mut has_duplicates) =
2146 implementor_dups.entry(path.last_name()).or_insert((did, false));
2147 if prev_did != did {
2148 *has_duplicates = true;
2155 for implementor in implementors {
2156 write!(w, "<li><code>")?;
2157 // If there's already another implementor that has the same abbridged name, use the
2158 // full path, for example in `std::iter::ExactSizeIterator`
2159 let use_absolute = match implementor.impl_.for_ {
2160 clean::ResolvedPath { ref path, is_generic: false, .. } |
2161 clean::BorrowedRef {
2162 type_: box clean::ResolvedPath { ref path, is_generic: false, .. },
2164 } => implementor_dups[path.last_name()].1,
2167 fmt_impl_for_trait_page(&implementor.impl_, w, use_absolute)?;
2168 writeln!(w, "</code></li>")?;
2171 write!(w, "</ul>")?;
2172 write!(w, r#"<script type="text/javascript" async
2173 src="{root_path}/implementors/{path}/{ty}.{name}.js">
2175 root_path = vec![".."; cx.current.len()].join("/"),
2176 path = if it.def_id.is_local() {
2177 cx.current.join("/")
2179 let (ref path, _) = cache.external_paths[&it.def_id];
2180 path[..path.len() - 1].join("/")
2182 ty = it.type_().css_class(),
2183 name = *it.name.as_ref().unwrap())?;
2187 fn naive_assoc_href(it: &clean::Item, link: AssocItemLink) -> String {
2188 use html::item_type::ItemType::*;
2190 let name = it.name.as_ref().unwrap();
2191 let ty = match it.type_() {
2192 Typedef | AssociatedType => AssociatedType,
2196 let anchor = format!("#{}.{}", ty, name);
2198 AssocItemLink::Anchor(Some(ref id)) => format!("#{}", id),
2199 AssocItemLink::Anchor(None) => anchor,
2200 AssocItemLink::GotoSource(did, _) => {
2201 href(did).map(|p| format!("{}{}", p.0, anchor)).unwrap_or(anchor)
2206 fn assoc_const(w: &mut fmt::Formatter,
2209 default: Option<&String>,
2210 link: AssocItemLink) -> fmt::Result {
2211 write!(w, "const <a href='{}' class='constant'>{}</a>",
2212 naive_assoc_href(it, link),
2213 it.name.as_ref().unwrap())?;
2215 write!(w, ": {}", ty)?;
2216 if let Some(default) = default {
2217 write!(w, " = {}", Escape(default))?;
2222 fn assoc_type(w: &mut fmt::Formatter, it: &clean::Item,
2223 bounds: &Vec<clean::TyParamBound>,
2224 default: Option<&clean::Type>,
2225 link: AssocItemLink) -> fmt::Result {
2226 write!(w, "type <a href='{}' class='type'>{}</a>",
2227 naive_assoc_href(it, link),
2228 it.name.as_ref().unwrap())?;
2229 if !bounds.is_empty() {
2230 write!(w, ": {}", TyParamBounds(bounds))?
2232 if let Some(default) = default {
2233 write!(w, " = {}", default)?;
2238 fn render_stability_since_raw<'a>(w: &mut fmt::Formatter,
2239 ver: Option<&'a str>,
2240 containing_ver: Option<&'a str>) -> fmt::Result {
2241 if let Some(v) = ver {
2242 if containing_ver != ver && v.len() > 0 {
2243 write!(w, "<div class='since' title='Stable since Rust version {0}'>{0}</div>",
2250 fn render_stability_since(w: &mut fmt::Formatter,
2252 containing_item: &clean::Item) -> fmt::Result {
2253 render_stability_since_raw(w, item.stable_since(), containing_item.stable_since())
2256 fn render_assoc_item(w: &mut fmt::Formatter,
2258 link: AssocItemLink,
2259 parent: ItemType) -> fmt::Result {
2260 fn method(w: &mut fmt::Formatter,
2262 unsafety: hir::Unsafety,
2263 constness: hir::Constness,
2265 g: &clean::Generics,
2267 link: AssocItemLink,
2270 let name = meth.name.as_ref().unwrap();
2271 let anchor = format!("#{}.{}", meth.type_(), name);
2272 let href = match link {
2273 AssocItemLink::Anchor(Some(ref id)) => format!("#{}", id),
2274 AssocItemLink::Anchor(None) => anchor,
2275 AssocItemLink::GotoSource(did, provided_methods) => {
2276 // We're creating a link from an impl-item to the corresponding
2277 // trait-item and need to map the anchored type accordingly.
2278 let ty = if provided_methods.contains(name) {
2284 href(did).map(|p| format!("{}#{}.{}", p.0, ty, name)).unwrap_or(anchor)
2287 // FIXME(#24111): remove when `const_fn` is stabilized
2288 let vis_constness = match UnstableFeatures::from_environment() {
2289 UnstableFeatures::Allow => constness,
2290 _ => hir::Constness::NotConst
2292 let prefix = format!("{}{}{:#}fn {}{:#}",
2293 ConstnessSpace(vis_constness),
2294 UnsafetySpace(unsafety),
2298 let mut indent = prefix.len();
2299 let where_indent = if parent == ItemType::Trait {
2302 } else if parent == ItemType::Impl {
2305 let prefix = prefix + &format!("{:#}", Method(d, indent));
2306 prefix.lines().last().unwrap().len() + 1
2308 write!(w, "{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
2309 {generics}{decl}{where_clause}",
2310 ConstnessSpace(vis_constness),
2311 UnsafetySpace(unsafety),
2316 decl = Method(d, indent),
2317 where_clause = WhereClause(g, where_indent))
2320 clean::StrippedItem(..) => Ok(()),
2321 clean::TyMethodItem(ref m) => {
2322 method(w, item, m.unsafety, hir::Constness::NotConst,
2323 m.abi, &m.generics, &m.decl, link, parent)
2325 clean::MethodItem(ref m) => {
2326 method(w, item, m.unsafety, m.constness,
2327 m.abi, &m.generics, &m.decl, link, parent)
2329 clean::AssociatedConstItem(ref ty, ref default) => {
2330 assoc_const(w, item, ty, default.as_ref(), link)
2332 clean::AssociatedTypeItem(ref bounds, ref default) => {
2333 assoc_type(w, item, bounds, default.as_ref(), link)
2335 _ => panic!("render_assoc_item called on non-associated-item")
2339 fn item_struct(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
2340 s: &clean::Struct) -> fmt::Result {
2341 write!(w, "<pre class='rust struct'>")?;
2342 render_attributes(w, it)?;
2350 write!(w, "</pre>")?;
2352 document(w, cx, it)?;
2353 let mut fields = s.fields.iter().filter_map(|f| {
2355 clean::StructFieldItem(ref ty) => Some((f, ty)),
2359 if let doctree::Plain = s.struct_type {
2360 if fields.peek().is_some() {
2361 write!(w, "<h2 class='fields'>Fields</h2>")?;
2362 for (field, ty) in fields {
2363 let id = derive_id(format!("{}.{}",
2364 ItemType::StructField,
2365 field.name.as_ref().unwrap()));
2366 let ns_id = derive_id(format!("{}.{}",
2367 field.name.as_ref().unwrap(),
2368 ItemType::StructField.name_space()));
2369 write!(w, "<span id='{id}' class='{item_type}'>
2370 <span id='{ns_id}' class='invisible'>
2371 <code>{name}: {ty}</code>
2372 </span></span><span class='stab {stab}'></span>",
2373 item_type = ItemType::StructField,
2376 stab = field.stability_class(),
2377 name = field.name.as_ref().unwrap(),
2379 document(w, cx, field)?;
2383 render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
2386 fn item_union(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
2387 s: &clean::Union) -> fmt::Result {
2388 write!(w, "<pre class='rust union'>")?;
2389 render_attributes(w, it)?;
2396 write!(w, "</pre>")?;
2398 document(w, cx, it)?;
2399 let mut fields = s.fields.iter().filter_map(|f| {
2401 clean::StructFieldItem(ref ty) => Some((f, ty)),
2405 if fields.peek().is_some() {
2406 write!(w, "<h2 class='fields'>Fields</h2>")?;
2407 for (field, ty) in fields {
2408 write!(w, "<span id='{shortty}.{name}' class='{shortty}'><code>{name}: {ty}</code>
2409 </span><span class='stab {stab}'></span>",
2410 shortty = ItemType::StructField,
2411 stab = field.stability_class(),
2412 name = field.name.as_ref().unwrap(),
2414 document(w, cx, field)?;
2417 render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
2420 fn item_enum(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
2421 e: &clean::Enum) -> fmt::Result {
2422 write!(w, "<pre class='rust enum'>")?;
2423 render_attributes(w, it)?;
2424 let padding = format!("{}enum {}{:#} ",
2425 VisSpace(&it.visibility),
2426 it.name.as_ref().unwrap(),
2428 write!(w, "{}enum {}{}{}",
2429 VisSpace(&it.visibility),
2430 it.name.as_ref().unwrap(),
2432 WhereClause(&e.generics, padding))?;
2433 if e.variants.is_empty() && !e.variants_stripped {
2434 write!(w, " {{}}")?;
2436 write!(w, " {{\n")?;
2437 for v in &e.variants {
2439 let name = v.name.as_ref().unwrap();
2441 clean::VariantItem(ref var) => {
2443 clean::VariantKind::CLike => write!(w, "{}", name)?,
2444 clean::VariantKind::Tuple(ref tys) => {
2445 write!(w, "{}(", name)?;
2446 for (i, ty) in tys.iter().enumerate() {
2448 write!(w, ", ")?
2450 write!(w, "{}", *ty)?;
2454 clean::VariantKind::Struct(ref s) => {
2470 if e.variants_stripped {
2471 write!(w, " // some variants omitted\n")?;
2475 write!(w, "</pre>")?;
2477 document(w, cx, it)?;
2478 if !e.variants.is_empty() {
2479 write!(w, "<h2 class='variants'>Variants</h2>\n")?;
2480 for variant in &e.variants {
2481 let id = derive_id(format!("{}.{}",
2483 variant.name.as_ref().unwrap()));
2484 let ns_id = derive_id(format!("{}.{}",
2485 variant.name.as_ref().unwrap(),
2486 ItemType::Variant.name_space()));
2487 write!(w, "<span id='{id}' class='variant'>\
2488 <span id='{ns_id}' class='invisible'><code>{name}",
2491 name = variant.name.as_ref().unwrap())?;
2492 if let clean::VariantItem(ref var) = variant.inner {
2493 if let clean::VariantKind::Tuple(ref tys) = var.kind {
2495 for (i, ty) in tys.iter().enumerate() {
2497 write!(w, ", ")?;
2499 write!(w, "{}", *ty)?;
2504 write!(w, "</code></span></span>")?;
2505 document(w, cx, variant)?;
2507 use clean::{Variant, VariantKind};
2508 if let clean::VariantItem(Variant {
2509 kind: VariantKind::Struct(ref s)
2510 }) = variant.inner {
2511 let variant_id = derive_id(format!("{}.{}.fields",
2513 variant.name.as_ref().unwrap()));
2514 write!(w, "<span class='docblock autohide sub-variant' id='{id}'>",
2516 write!(w, "<h3 class='fields'>Fields of <code>{name}</code></h3>\n
2517 <table>", name = variant.name.as_ref().unwrap())?;
2518 for field in &s.fields {
2519 use clean::StructFieldItem;
2520 if let StructFieldItem(ref ty) = field.inner {
2521 let id = derive_id(format!("variant.{}.field.{}",
2522 variant.name.as_ref().unwrap(),
2523 field.name.as_ref().unwrap()));
2524 let ns_id = derive_id(format!("{}.{}.{}.{}",
2525 variant.name.as_ref().unwrap(),
2526 ItemType::Variant.name_space(),
2527 field.name.as_ref().unwrap(),
2528 ItemType::StructField.name_space()));
2529 write!(w, "<tr><td \
2531 <span id='{ns_id}' class='invisible'>\
2532 <code>{f}: {t}</code></span></td><td>",
2535 f = field.name.as_ref().unwrap(),
2537 document(w, cx, field)?;
2538 write!(w, "</td></tr>")?;
2541 write!(w, "</table></span>")?;
2543 render_stability_since(w, variant, it)?;
2546 render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)?;
2550 fn render_attribute(attr: &ast::MetaItem) -> Option<String> {
2551 let name = attr.name();
2554 Some(format!("{}", name))
2555 } else if let Some(v) = attr.value_str() {
2556 Some(format!("{} = {:?}", name, &v.as_str()[..]))
2557 } else if let Some(values) = attr.meta_item_list() {
2558 let display: Vec<_> = values.iter().filter_map(|attr| {
2559 attr.meta_item().and_then(|mi| render_attribute(mi))
2562 if display.len() > 0 {
2563 Some(format!("{}({})", name, display.join(", ")))
2572 const ATTRIBUTE_WHITELIST: &'static [&'static str] = &[
2579 "unsafe_destructor_blind_to_params"
2582 fn render_attributes(w: &mut fmt::Formatter, it: &clean::Item) -> fmt::Result {
2583 let mut attrs = String::new();
2585 for attr in &it.attrs.other_attrs {
2586 let name = attr.name();
2587 if !ATTRIBUTE_WHITELIST.contains(&&name.as_str()[..]) {
2590 if let Some(s) = render_attribute(attr.meta()) {
2591 attrs.push_str(&format!("#[{}]\n", s));
2594 if attrs.len() > 0 {
2595 write!(w, "<div class=\"docblock attributes\">{}</div>", &attrs)?;
2600 fn render_struct(w: &mut fmt::Formatter, it: &clean::Item,
2601 g: Option<&clean::Generics>,
2602 ty: doctree::StructType,
2603 fields: &[clean::Item],
2605 structhead: bool) -> fmt::Result {
2606 let mut plain = String::new();
2608 VisSpace(&it.visibility),
2609 if structhead {"struct "} else {""},
2610 it.name.as_ref().unwrap())?;
2611 plain.push_str(&format!("{}{}{}",
2612 VisSpace(&it.visibility),
2613 if structhead {"struct "} else {""},
2614 it.name.as_ref().unwrap()));
2615 if let Some(g) = g {
2616 plain.push_str(&format!("{:#}", g));
2621 if let Some(g) = g {
2622 write!(w, "{}", WhereClause(g, plain.len() + 1))?
2624 let mut has_visible_fields = false;
2626 for field in fields {
2627 if let clean::StructFieldItem(ref ty) = field.inner {
2628 write!(w, "\n{} {}{}: {},",
2630 VisSpace(&field.visibility),
2631 field.name.as_ref().unwrap(),
2633 has_visible_fields = true;
2637 if has_visible_fields {
2638 if it.has_stripped_fields().unwrap() {
2639 write!(w, "\n{} // some fields omitted", tab)?;
2641 write!(w, "\n{}", tab)?;
2642 } else if it.has_stripped_fields().unwrap() {
2643 // If there are no visible fields we can just display
2644 // `{ /* fields omitted */ }` to save space.
2645 write!(w, " /* fields omitted */ ")?;
2651 plain.push_str("(");
2652 for (i, field) in fields.iter().enumerate() {
2655 plain.push_str(", ");
2658 clean::StrippedItem(box clean::StructFieldItem(..)) => {
2659 plain.push_str("_");
2662 clean::StructFieldItem(ref ty) => {
2663 plain.push_str(&format!("{}{:#}", VisSpace(&field.visibility), *ty));
2664 write!(w, "{}{}", VisSpace(&field.visibility), *ty)?
2670 plain.push_str(")");
2671 if let Some(g) = g {
2672 write!(w, "{}", WhereClause(g, plain.len() + 1))?
2677 // Needed for PhantomData.
2678 if let Some(g) = g {
2679 write!(w, "{}", WhereClause(g, plain.len() + 1))?
2687 fn render_union(w: &mut fmt::Formatter, it: &clean::Item,
2688 g: Option<&clean::Generics>,
2689 fields: &[clean::Item],
2691 structhead: bool) -> fmt::Result {
2692 let mut plain = String::new();
2694 VisSpace(&it.visibility),
2695 if structhead {"union "} else {""},
2696 it.name.as_ref().unwrap())?;
2697 plain.push_str(&format!("{}{}{}",
2698 VisSpace(&it.visibility),
2699 if structhead {"union "} else {""},
2700 it.name.as_ref().unwrap()));
2701 if let Some(g) = g {
2702 write!(w, "{}", g)?;
2703 plain.push_str(&format!("{:#}", g));
2704 write!(w, "{}", WhereClause(g, plain.len() + 1))?;
2707 write!(w, " {{\n{}", tab)?;
2708 for field in fields {
2709 if let clean::StructFieldItem(ref ty) = field.inner {
2710 write!(w, " {}{}: {},\n{}",
2711 VisSpace(&field.visibility),
2712 field.name.as_ref().unwrap(),
2718 if it.has_stripped_fields().unwrap() {
2719 write!(w, " // some fields omitted\n{}", tab)?;
2725 #[derive(Copy, Clone)]
2726 enum AssocItemLink<'a> {
2727 Anchor(Option<&'a str>),
2728 GotoSource(DefId, &'a FxHashSet<String>),
2731 impl<'a> AssocItemLink<'a> {
2732 fn anchor(&self, id: &'a String) -> Self {
2734 AssocItemLink::Anchor(_) => { AssocItemLink::Anchor(Some(&id)) },
2735 ref other => *other,
2740 enum AssocItemRender<'a> {
2742 DerefFor { trait_: &'a clean::Type, type_: &'a clean::Type, deref_mut_: bool }
2745 #[derive(Copy, Clone, PartialEq)]
2748 ForDeref { mut_: bool },
2751 fn render_assoc_items(w: &mut fmt::Formatter,
2753 containing_item: &clean::Item,
2755 what: AssocItemRender) -> fmt::Result {
2757 let v = match c.impls.get(&it) {
2759 None => return Ok(()),
2761 let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| {
2762 i.inner_impl().trait_.is_none()
2764 if !non_trait.is_empty() {
2765 let render_mode = match what {
2766 AssocItemRender::All => {
2767 write!(w, "<h2 id='methods'>Methods</h2>")?;
2770 AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => {
2771 write!(w, "<h2 id='deref-methods'>Methods from \
2772 {}<Target={}></h2>", trait_, type_)?;
2773 RenderMode::ForDeref { mut_: deref_mut_ }
2776 for i in &non_trait {
2777 render_impl(w, cx, i, AssocItemLink::Anchor(None), render_mode,
2778 containing_item.stable_since())?;
2781 if let AssocItemRender::DerefFor { .. } = what {
2784 if !traits.is_empty() {
2785 let deref_impl = traits.iter().find(|t| {
2786 t.inner_impl().trait_.def_id() == c.deref_trait_did
2788 if let Some(impl_) = deref_impl {
2789 let has_deref_mut = traits.iter().find(|t| {
2790 t.inner_impl().trait_.def_id() == c.deref_mut_trait_did
2792 render_deref_methods(w, cx, impl_, containing_item, has_deref_mut)?;
2794 write!(w, "<h2 id='implementations'>Trait \
2795 Implementations</h2>")?;
2797 let did = i.trait_did().unwrap();
2798 let assoc_link = AssocItemLink::GotoSource(did, &i.inner_impl().provided_trait_methods);
2799 render_impl(w, cx, i, assoc_link,
2800 RenderMode::Normal, containing_item.stable_since())?;
2806 fn render_deref_methods(w: &mut fmt::Formatter, cx: &Context, impl_: &Impl,
2807 container_item: &clean::Item, deref_mut: bool) -> fmt::Result {
2808 let deref_type = impl_.inner_impl().trait_.as_ref().unwrap();
2809 let target = impl_.inner_impl().items.iter().filter_map(|item| {
2811 clean::TypedefItem(ref t, true) => Some(&t.type_),
2814 }).next().expect("Expected associated type binding");
2815 let what = AssocItemRender::DerefFor { trait_: deref_type, type_: target,
2816 deref_mut_: deref_mut };
2817 if let Some(did) = target.def_id() {
2818 render_assoc_items(w, cx, container_item, did, what)
2820 if let Some(prim) = target.primitive_type() {
2821 if let Some(&did) = cache().primitive_locations.get(&prim) {
2822 render_assoc_items(w, cx, container_item, did, what)?;
2829 fn render_impl(w: &mut fmt::Formatter, cx: &Context, i: &Impl, link: AssocItemLink,
2830 render_mode: RenderMode, outer_version: Option<&str>) -> fmt::Result {
2831 if render_mode == RenderMode::Normal {
2832 write!(w, "<h3 class='impl'><span class='in-band'><code>{}</code>", i.inner_impl())?;
2833 write!(w, "</span><span class='out-of-band'>")?;
2834 let since = i.impl_item.stability.as_ref().map(|s| &s.since[..]);
2835 if let Some(l) = (Item { item: &i.impl_item, cx: cx }).src_href() {
2836 write!(w, "<div class='ghost'></div>")?;
2837 render_stability_since_raw(w, since, outer_version)?;
2838 write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>",
2839 l, "goto source code")?;
2841 render_stability_since_raw(w, since, outer_version)?;
2843 write!(w, "</span>")?;
2844 write!(w, "</h3>\n")?;
2845 if let Some(ref dox) = i.impl_item.doc_value() {
2846 write!(w, "<div class='docblock'>{}</div>", Markdown(dox))?;
2850 fn doc_impl_item(w: &mut fmt::Formatter, cx: &Context, item: &clean::Item,
2851 link: AssocItemLink, render_mode: RenderMode,
2852 is_default_item: bool, outer_version: Option<&str>,
2853 trait_: Option<&clean::Trait>) -> fmt::Result {
2854 let item_type = item.type_();
2855 let name = item.name.as_ref().unwrap();
2857 let render_method_item: bool = match render_mode {
2858 RenderMode::Normal => true,
2859 RenderMode::ForDeref { mut_: deref_mut_ } => {
2860 let self_type_opt = match item.inner {
2861 clean::MethodItem(ref method) => method.decl.self_type(),
2862 clean::TyMethodItem(ref method) => method.decl.self_type(),
2866 if let Some(self_ty) = self_type_opt {
2867 let by_mut_ref = match self_ty {
2868 SelfTy::SelfBorrowed(_lifetime, mutability) => {
2869 mutability == Mutability::Mutable
2871 SelfTy::SelfExplicit(clean::BorrowedRef { mutability, .. }) => {
2872 mutability == Mutability::Mutable
2877 deref_mut_ || !by_mut_ref
2885 clean::MethodItem(..) | clean::TyMethodItem(..) => {
2886 // Only render when the method is not static or we allow static methods
2887 if render_method_item {
2888 let id = derive_id(format!("{}.{}", item_type, name));
2889 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2890 write!(w, "<h4 id='{}' class='{}'>", id, item_type)?;
2891 write!(w, "<span id='{}' class='invisible'>", ns_id)?;
2892 write!(w, "<code>")?;
2893 render_assoc_item(w, item, link.anchor(&id), ItemType::Impl)?;
2894 write!(w, "</code>")?;
2895 render_stability_since_raw(w, item.stable_since(), outer_version)?;
2896 write!(w, "</span></h4>\n")?;
2899 clean::TypedefItem(ref tydef, _) => {
2900 let id = derive_id(format!("{}.{}", ItemType::AssociatedType, name));
2901 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2902 write!(w, "<h4 id='{}' class='{}'>", id, item_type)?;
2903 write!(w, "<span id='{}' class='invisible'><code>", ns_id)?;
2904 assoc_type(w, item, &Vec::new(), Some(&tydef.type_), link.anchor(&id))?;
2905 write!(w, "</code></span></h4>\n")?;
2907 clean::AssociatedConstItem(ref ty, ref default) => {
2908 let id = derive_id(format!("{}.{}", item_type, name));
2909 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2910 write!(w, "<h4 id='{}' class='{}'>", id, item_type)?;
2911 write!(w, "<span id='{}' class='invisible'><code>", ns_id)?;
2912 assoc_const(w, item, ty, default.as_ref(), link.anchor(&id))?;
2913 write!(w, "</code></span></h4>\n")?;
2915 clean::ConstantItem(ref c) => {
2916 let id = derive_id(format!("{}.{}", item_type, name));
2917 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2918 write!(w, "<h4 id='{}' class='{}'>", id, item_type)?;
2919 write!(w, "<span id='{}' class='invisible'><code>", ns_id)?;
2920 assoc_const(w, item, &c.type_, Some(&c.expr), link.anchor(&id))?;
2921 write!(w, "</code></span></h4>\n")?;
2923 clean::AssociatedTypeItem(ref bounds, ref default) => {
2924 let id = derive_id(format!("{}.{}", item_type, name));
2925 let ns_id = derive_id(format!("{}.{}", name, item_type.name_space()));
2926 write!(w, "<h4 id='{}' class='{}'>", id, item_type)?;
2927 write!(w, "<span id='{}' class='invisible'><code>", ns_id)?;
2928 assoc_type(w, item, bounds, default.as_ref(), link.anchor(&id))?;
2929 write!(w, "</code></span></h4>\n")?;
2931 clean::StrippedItem(..) => return Ok(()),
2932 _ => panic!("can't make docs for trait item with name {:?}", item.name)
2935 if render_method_item || render_mode == RenderMode::Normal {
2936 if !is_default_item {
2937 if let Some(t) = trait_ {
2938 // The trait item may have been stripped so we might not
2939 // find any documentation or stability for it.
2940 if let Some(it) = t.items.iter().find(|i| i.name == item.name) {
2941 // We need the stability of the item from the trait
2942 // because impls can't have a stability.
2943 document_stability(w, cx, it)?;
2944 if item.doc_value().is_some() {
2945 document_full(w, item)?;
2947 // In case the item isn't documented,
2948 // provide short documentation from the trait.
2949 document_short(w, it, link)?;
2953 document(w, cx, item)?;
2956 document_stability(w, cx, item)?;
2957 document_short(w, item, link)?;
2963 let traits = &cache().traits;
2964 let trait_ = i.trait_did().and_then(|did| traits.get(&did));
2966 write!(w, "<div class='impl-items'>")?;
2967 for trait_item in &i.inner_impl().items {
2968 doc_impl_item(w, cx, trait_item, link, render_mode,
2969 false, outer_version, trait_)?;
2972 fn render_default_items(w: &mut fmt::Formatter,
2976 render_mode: RenderMode,
2977 outer_version: Option<&str>) -> fmt::Result {
2978 for trait_item in &t.items {
2979 let n = trait_item.name.clone();
2980 if i.items.iter().find(|m| m.name == n).is_some() {
2983 let did = i.trait_.as_ref().unwrap().def_id().unwrap();
2984 let assoc_link = AssocItemLink::GotoSource(did, &i.provided_trait_methods);
2986 doc_impl_item(w, cx, trait_item, assoc_link, render_mode, true,
2987 outer_version, None)?;
2992 // If we've implemented a trait, then also emit documentation for all
2993 // default items which weren't overridden in the implementation block.
2994 if let Some(t) = trait_ {
2995 render_default_items(w, cx, t, &i.inner_impl(), render_mode, outer_version)?;
2997 write!(w, "</div>")?;
3001 fn item_typedef(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
3002 t: &clean::Typedef) -> fmt::Result {
3003 let indent = format!("type {}{:#} ", it.name.as_ref().unwrap(), t.generics).len();
3004 write!(w, "<pre class='rust typedef'>type {}{}{where_clause} = {type_};</pre>",
3005 it.name.as_ref().unwrap(),
3007 where_clause = WhereClause(&t.generics, indent),
3013 impl<'a> fmt::Display for Sidebar<'a> {
3014 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
3017 let parentlen = cx.current.len() - if it.is_mod() {1} else {0};
3019 // The sidebar is designed to display sibling functions, modules and
3020 // other miscellaneous information. since there are lots of sibling
3021 // items (and that causes quadratic growth in large modules),
3022 // we refactor common parts into a shared JavaScript file per module.
3023 // still, we don't move everything into JS because we want to preserve
3024 // as much HTML as possible in order to allow non-JS-enabled browsers
3025 // to navigate the documentation (though slightly inefficiently).
3027 write!(fmt, "<p class='location'>")?;
3028 for (i, name) in cx.current.iter().take(parentlen).enumerate() {
3030 write!(fmt, "::<wbr>")?;
3032 write!(fmt, "<a href='{}index.html'>{}</a>",
3033 &cx.root_path()[..(cx.current.len() - i - 1) * 3],
3036 write!(fmt, "</p>")?;
3038 // Sidebar refers to the enclosing module, not this module.
3039 let relpath = if it.is_mod() { "../" } else { "" };
3041 "<script>window.sidebarCurrent = {{\
3046 name = it.name.as_ref().map(|x| &x[..]).unwrap_or(""),
3047 ty = it.type_().css_class(),
3050 // There is no sidebar-items.js beyond the crate root path
3051 // FIXME maybe dynamic crate loading can be merged here
3053 write!(fmt, "<script defer src=\"{path}sidebar-items.js\"></script>",
3061 impl<'a> fmt::Display for Source<'a> {
3062 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
3063 let Source(s) = *self;
3064 let lines = s.lines().count();
3066 let mut tmp = lines;
3071 write!(fmt, "<pre class=\"line-numbers\">")?;
3072 for i in 1..lines + 1 {
3073 write!(fmt, "<span id=\"{0}\">{0:1$}</span>\n", i, cols)?;
3075 write!(fmt, "</pre>")?;
3076 write!(fmt, "{}", highlight::render_with_highlighting(s, None, None, None))?;
3081 fn item_macro(w: &mut fmt::Formatter, cx: &Context, it: &clean::Item,
3082 t: &clean::Macro) -> fmt::Result {
3083 w.write_str(&highlight::render_with_highlighting(&t.source,
3090 fn item_primitive(w: &mut fmt::Formatter, cx: &Context,
3092 _p: &clean::PrimitiveType) -> fmt::Result {
3093 document(w, cx, it)?;
3094 render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
3097 const BASIC_KEYWORDS: &'static str = "rust, rustlang, rust-lang";
3099 fn make_item_keywords(it: &clean::Item) -> String {
3100 format!("{}, {}", BASIC_KEYWORDS, it.name.as_ref().unwrap())
3103 fn get_index_search_type(item: &clean::Item) -> Option<IndexItemFunctionType> {
3104 let decl = match item.inner {
3105 clean::FunctionItem(ref f) => &f.decl,
3106 clean::MethodItem(ref m) => &m.decl,
3107 clean::TyMethodItem(ref m) => &m.decl,
3111 let inputs = decl.inputs.values.iter().map(|arg| get_index_type(&arg.type_)).collect();
3112 let output = match decl.output {
3113 clean::FunctionRetTy::Return(ref return_type) => Some(get_index_type(return_type)),
3117 Some(IndexItemFunctionType { inputs: inputs, output: output })
3120 fn get_index_type(clean_type: &clean::Type) -> Type {
3121 Type { name: get_index_type_name(clean_type).map(|s| s.to_ascii_lowercase()) }
3124 fn get_index_type_name(clean_type: &clean::Type) -> Option<String> {
3126 clean::ResolvedPath { ref path, .. } => {
3127 let segments = &path.segments;
3128 Some(segments[segments.len() - 1].name.clone())
3130 clean::Generic(ref s) => Some(s.clone()),
3131 clean::Primitive(ref p) => Some(format!("{:?}", p)),
3132 clean::BorrowedRef { ref type_, .. } => get_index_type_name(type_),
3133 // FIXME: add all from clean::Type.
3138 pub fn cache() -> Arc<Cache> {
3139 CACHE_KEY.with(|c| c.borrow().clone())
3144 fn test_unique_id() {
3145 let input = ["foo", "examples", "examples", "method.into_iter","examples",
3146 "method.into_iter", "foo", "main", "search", "methods",
3147 "examples", "method.into_iter", "assoc_type.Item", "assoc_type.Item"];
3148 let expected = ["foo", "examples", "examples-1", "method.into_iter", "examples-2",
3149 "method.into_iter-1", "foo-1", "main-1", "search-1", "methods-1",
3150 "examples-3", "method.into_iter-2", "assoc_type.Item", "assoc_type.Item-1"];
3153 let actual: Vec<String> = input.iter().map(|s| derive_id(s.to_string())).collect();
3154 assert_eq!(&actual[..], expected);