1 // Copyright 2012-2013 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 //! This module contains the "cleaned" pieces of the AST, and the functions
14 pub use self::Type::*;
15 pub use self::Mutability::*;
16 pub use self::ItemEnum::*;
17 pub use self::TyParamBound::*;
18 pub use self::SelfTy::*;
19 pub use self::FunctionRetTy::*;
20 pub use self::Visibility::*;
23 use rustc_target::spec::abi::Abi;
24 use syntax::ast::{self, AttrStyle, Ident};
26 use syntax::codemap::{dummy_spanned, Spanned};
27 use syntax::feature_gate::UnstableFeatures;
29 use syntax::symbol::keywords;
30 use syntax::symbol::{Symbol, InternedString};
31 use syntax_pos::{self, DUMMY_SP, Pos, FileName};
33 use rustc::middle::const_val::ConstVal;
34 use rustc::middle::privacy::AccessLevels;
35 use rustc::middle::resolve_lifetime as rl;
36 use rustc::ty::fold::TypeFolder;
37 use rustc::middle::lang_items;
38 use rustc::mir::interpret::GlobalId;
39 use rustc::hir::{self, HirVec};
40 use rustc::hir::def::{self, Def, CtorKind};
41 use rustc::hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE};
42 use rustc::hir::def_id::DefIndexAddressSpace;
43 use rustc::ty::subst::Substs;
44 use rustc::ty::{self, TyCtxt, Region, RegionVid, Ty, AdtKind};
45 use rustc::middle::stability;
46 use rustc::util::nodemap::{FxHashMap, FxHashSet};
47 use rustc_typeck::hir_ty_to_ty;
48 use rustc::infer::region_constraints::{RegionConstraintData, Constraint};
49 use std::collections::hash_map::Entry;
52 use std::default::Default;
53 use std::{mem, slice, vec};
54 use std::iter::{FromIterator, once};
55 use rustc_data_structures::sync::Lrc;
57 use std::cell::RefCell;
61 use core::{self, DocContext};
64 use html::render::{cache, ExternalLocation};
65 use html::item_type::ItemType;
66 use html::markdown::markdown_links;
74 use self::auto_trait::AutoTraitFinder;
76 thread_local!(static MAX_DEF_ID: RefCell<FxHashMap<CrateNum, DefId>> = RefCell::new(FxHashMap()));
78 const FN_OUTPUT_NAME: &'static str = "Output";
80 // extract the stability index for a node from tcx, if possible
81 fn get_stability(cx: &DocContext, def_id: DefId) -> Option<Stability> {
82 cx.tcx.lookup_stability(def_id).clean(cx)
85 fn get_deprecation(cx: &DocContext, def_id: DefId) -> Option<Deprecation> {
86 cx.tcx.lookup_deprecation(def_id).clean(cx)
90 fn clean(&self, cx: &DocContext) -> T;
93 impl<T: Clean<U>, U> Clean<Vec<U>> for [T] {
94 fn clean(&self, cx: &DocContext) -> Vec<U> {
95 self.iter().map(|x| x.clean(cx)).collect()
99 impl<T: Clean<U>, U> Clean<U> for P<T> {
100 fn clean(&self, cx: &DocContext) -> U {
105 impl<T: Clean<U>, U> Clean<U> for Rc<T> {
106 fn clean(&self, cx: &DocContext) -> U {
111 impl<T: Clean<U>, U> Clean<Option<U>> for Option<T> {
112 fn clean(&self, cx: &DocContext) -> Option<U> {
113 self.as_ref().map(|v| v.clean(cx))
117 impl<T, U> Clean<U> for ty::Binder<T> where T: Clean<U> {
118 fn clean(&self, cx: &DocContext) -> U {
119 self.skip_binder().clean(cx)
123 impl<T: Clean<U>, U> Clean<Vec<U>> for P<[T]> {
124 fn clean(&self, cx: &DocContext) -> Vec<U> {
125 self.iter().map(|x| x.clean(cx)).collect()
129 #[derive(Clone, Debug)]
132 pub version: Option<String>,
134 pub module: Option<Item>,
135 pub externs: Vec<(CrateNum, ExternalCrate)>,
136 pub primitives: Vec<(DefId, PrimitiveType, Attributes)>,
137 pub access_levels: Arc<AccessLevels<DefId>>,
138 // These are later on moved into `CACHEKEY`, leaving the map empty.
139 // Only here so that they can be filtered through the rustdoc passes.
140 pub external_traits: FxHashMap<DefId, Trait>,
141 pub masked_crates: FxHashSet<CrateNum>,
144 impl<'a, 'tcx, 'rcx> Clean<Crate> for visit_ast::RustdocVisitor<'a, 'tcx, 'rcx> {
145 fn clean(&self, cx: &DocContext) -> Crate {
146 use ::visit_lib::LibEmbargoVisitor;
149 let mut r = cx.renderinfo.borrow_mut();
150 r.deref_trait_did = cx.tcx.lang_items().deref_trait();
151 r.deref_mut_trait_did = cx.tcx.lang_items().deref_mut_trait();
152 r.owned_box_did = cx.tcx.lang_items().owned_box();
155 let mut externs = Vec::new();
156 for &cnum in cx.tcx.crates().iter() {
157 externs.push((cnum, cnum.clean(cx)));
158 // Analyze doc-reachability for extern items
159 LibEmbargoVisitor::new(cx).visit_lib(cnum);
161 externs.sort_by(|&(a, _), &(b, _)| a.cmp(&b));
163 // Clean the crate, translating the entire libsyntax AST to one that is
164 // understood by rustdoc.
165 let mut module = self.module.clean(cx);
166 let mut masked_crates = FxHashSet();
169 ModuleItem(ref module) => {
170 for it in &module.items {
171 if it.is_extern_crate() && it.attrs.has_doc_flag("masked") {
172 masked_crates.insert(it.def_id.krate);
179 let ExternalCrate { name, src, primitives, .. } = LOCAL_CRATE.clean(cx);
181 let m = match module.inner {
182 ModuleItem(ref mut m) => m,
185 m.items.extend(primitives.iter().map(|&(def_id, prim, ref attrs)| {
187 source: Span::empty(),
188 name: Some(prim.to_url_str().to_string()),
189 attrs: attrs.clone(),
190 visibility: Some(Public),
191 stability: get_stability(cx, def_id),
192 deprecation: get_deprecation(cx, def_id),
194 inner: PrimitiveItem(prim),
199 let mut access_levels = cx.access_levels.borrow_mut();
200 let mut external_traits = cx.external_traits.borrow_mut();
206 module: Some(module),
209 access_levels: Arc::new(mem::replace(&mut access_levels, Default::default())),
210 external_traits: mem::replace(&mut external_traits, Default::default()),
216 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
217 pub struct ExternalCrate {
220 pub attrs: Attributes,
221 pub primitives: Vec<(DefId, PrimitiveType, Attributes)>,
224 impl Clean<ExternalCrate> for CrateNum {
225 fn clean(&self, cx: &DocContext) -> ExternalCrate {
226 let root = DefId { krate: *self, index: CRATE_DEF_INDEX };
227 let krate_span = cx.tcx.def_span(root);
228 let krate_src = cx.sess().codemap().span_to_filename(krate_span);
230 // Collect all inner modules which are tagged as implementations of
233 // Note that this loop only searches the top-level items of the crate,
234 // and this is intentional. If we were to search the entire crate for an
235 // item tagged with `#[doc(primitive)]` then we would also have to
236 // search the entirety of external modules for items tagged
237 // `#[doc(primitive)]`, which is a pretty inefficient process (decoding
238 // all that metadata unconditionally).
240 // In order to keep the metadata load under control, the
241 // `#[doc(primitive)]` feature is explicitly designed to only allow the
242 // primitive tags to show up as the top level items in a crate.
244 // Also note that this does not attempt to deal with modules tagged
245 // duplicately for the same primitive. This is handled later on when
246 // rendering by delegating everything to a hash map.
247 let as_primitive = |def: Def| {
248 if let Def::Mod(def_id) = def {
249 let attrs = cx.tcx.get_attrs(def_id).clean(cx);
251 for attr in attrs.lists("doc") {
252 if let Some(v) = attr.value_str() {
253 if attr.check_name("primitive") {
254 prim = PrimitiveType::from_str(&v.as_str());
258 // FIXME: should warn on unknown primitives?
262 return prim.map(|p| (def_id, p, attrs));
266 let primitives = if root.is_local() {
267 cx.tcx.hir.krate().module.item_ids.iter().filter_map(|&id| {
268 let item = cx.tcx.hir.expect_item(id.id);
271 as_primitive(Def::Mod(cx.tcx.hir.local_def_id(id.id)))
273 hir::ItemUse(ref path, hir::UseKind::Single)
274 if item.vis == hir::Visibility::Public => {
275 as_primitive(path.def).map(|(_, prim, attrs)| {
276 // Pretend the primitive is local.
277 (cx.tcx.hir.local_def_id(id.id), prim, attrs)
284 cx.tcx.item_children(root).iter().map(|item| item.def)
285 .filter_map(as_primitive).collect()
289 name: cx.tcx.crate_name(*self).to_string(),
291 attrs: cx.tcx.get_attrs(root).clean(cx),
297 /// Anything with a source location and set of attributes and, optionally, a
298 /// name. That is, anything that can be documented. This doesn't correspond
299 /// directly to the AST's concept of an item; it's a strict superset.
300 #[derive(Clone, RustcEncodable, RustcDecodable)]
304 /// Not everything has a name. E.g., impls
305 pub name: Option<String>,
306 pub attrs: Attributes,
308 pub visibility: Option<Visibility>,
310 pub stability: Option<Stability>,
311 pub deprecation: Option<Deprecation>,
314 impl fmt::Debug for Item {
315 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
317 let fake = MAX_DEF_ID.with(|m| m.borrow().get(&self.def_id.krate)
318 .map(|id| self.def_id >= *id).unwrap_or(false));
319 let def_id: &fmt::Debug = if fake { &"**FAKE**" } else { &self.def_id };
321 fmt.debug_struct("Item")
322 .field("source", &self.source)
323 .field("name", &self.name)
324 .field("attrs", &self.attrs)
325 .field("inner", &self.inner)
326 .field("visibility", &self.visibility)
327 .field("def_id", def_id)
328 .field("stability", &self.stability)
329 .field("deprecation", &self.deprecation)
335 /// Finds the `doc` attribute as a NameValue and returns the corresponding
337 pub fn doc_value<'a>(&'a self) -> Option<&'a str> {
338 self.attrs.doc_value()
340 /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined
342 pub fn collapsed_doc_value(&self) -> Option<String> {
343 self.attrs.collapsed_doc_value()
346 pub fn links(&self) -> Vec<(String, String)> {
347 self.attrs.links(&self.def_id.krate)
350 pub fn is_crate(&self) -> bool {
352 StrippedItem(box ModuleItem(Module { is_crate: true, ..})) |
353 ModuleItem(Module { is_crate: true, ..}) => true,
357 pub fn is_mod(&self) -> bool {
358 self.type_() == ItemType::Module
360 pub fn is_trait(&self) -> bool {
361 self.type_() == ItemType::Trait
363 pub fn is_struct(&self) -> bool {
364 self.type_() == ItemType::Struct
366 pub fn is_enum(&self) -> bool {
367 self.type_() == ItemType::Enum
369 pub fn is_fn(&self) -> bool {
370 self.type_() == ItemType::Function
372 pub fn is_associated_type(&self) -> bool {
373 self.type_() == ItemType::AssociatedType
375 pub fn is_associated_const(&self) -> bool {
376 self.type_() == ItemType::AssociatedConst
378 pub fn is_method(&self) -> bool {
379 self.type_() == ItemType::Method
381 pub fn is_ty_method(&self) -> bool {
382 self.type_() == ItemType::TyMethod
384 pub fn is_typedef(&self) -> bool {
385 self.type_() == ItemType::Typedef
387 pub fn is_primitive(&self) -> bool {
388 self.type_() == ItemType::Primitive
390 pub fn is_union(&self) -> bool {
391 self.type_() == ItemType::Union
393 pub fn is_import(&self) -> bool {
394 self.type_() == ItemType::Import
396 pub fn is_extern_crate(&self) -> bool {
397 self.type_() == ItemType::ExternCrate
400 pub fn is_stripped(&self) -> bool {
401 match self.inner { StrippedItem(..) => true, _ => false }
403 pub fn has_stripped_fields(&self) -> Option<bool> {
405 StructItem(ref _struct) => Some(_struct.fields_stripped),
406 UnionItem(ref union) => Some(union.fields_stripped),
407 VariantItem(Variant { kind: VariantKind::Struct(ref vstruct)} ) => {
408 Some(vstruct.fields_stripped)
414 pub fn stability_class(&self) -> Option<String> {
415 self.stability.as_ref().and_then(|ref s| {
416 let mut classes = Vec::with_capacity(2);
418 if s.level == stability::Unstable {
419 classes.push("unstable");
422 if !s.deprecated_since.is_empty() {
423 classes.push("deprecated");
426 if classes.len() != 0 {
427 Some(classes.join(" "))
434 pub fn stable_since(&self) -> Option<&str> {
435 self.stability.as_ref().map(|s| &s.since[..])
438 /// Returns a documentation-level item type from the item.
439 pub fn type_(&self) -> ItemType {
444 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
446 ExternCrateItem(String, Option<String>),
451 FunctionItem(Function),
453 TypedefItem(Typedef, bool /* is associated type */),
455 ConstantItem(Constant),
458 /// A method signature only. Used for required methods in traits (ie,
459 /// non-default-methods).
460 TyMethodItem(TyMethod),
461 /// A method with a body.
463 StructFieldItem(Type),
464 VariantItem(Variant),
465 /// `fn`s from an extern block
466 ForeignFunctionItem(Function),
467 /// `static`s from an extern block
468 ForeignStaticItem(Static),
469 /// `type`s from an extern block
472 PrimitiveItem(PrimitiveType),
473 AssociatedConstItem(Type, Option<String>),
474 AssociatedTypeItem(Vec<TyParamBound>, Option<Type>),
475 /// An item that has been stripped by a rustdoc pass
476 StrippedItem(Box<ItemEnum>),
480 pub fn generics(&self) -> Option<&Generics> {
482 ItemEnum::StructItem(ref s) => &s.generics,
483 ItemEnum::EnumItem(ref e) => &e.generics,
484 ItemEnum::FunctionItem(ref f) => &f.generics,
485 ItemEnum::TypedefItem(ref t, _) => &t.generics,
486 ItemEnum::TraitItem(ref t) => &t.generics,
487 ItemEnum::ImplItem(ref i) => &i.generics,
488 ItemEnum::TyMethodItem(ref i) => &i.generics,
489 ItemEnum::MethodItem(ref i) => &i.generics,
490 ItemEnum::ForeignFunctionItem(ref f) => &f.generics,
496 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
498 pub items: Vec<Item>,
502 impl Clean<Item> for doctree::Module {
503 fn clean(&self, cx: &DocContext) -> Item {
504 let name = if self.name.is_some() {
505 self.name.unwrap().clean(cx)
510 // maintain a stack of mod ids, for doc comment path resolution
511 // but we also need to resolve the module's own docs based on whether its docs were written
512 // inside or outside the module, so check for that
513 let attrs = if self.attrs.iter()
514 .filter(|a| a.check_name("doc"))
516 .map_or(true, |a| a.style == AttrStyle::Inner) {
517 // inner doc comment, use the module's own scope for resolution
518 cx.mod_ids.borrow_mut().push(self.id);
521 // outer doc comment, use its parent's scope
522 let attrs = self.attrs.clean(cx);
523 cx.mod_ids.borrow_mut().push(self.id);
527 let mut items: Vec<Item> = vec![];
528 items.extend(self.extern_crates.iter().map(|x| x.clean(cx)));
529 items.extend(self.imports.iter().flat_map(|x| x.clean(cx)));
530 items.extend(self.structs.iter().flat_map(|x| x.clean(cx)));
531 items.extend(self.unions.iter().flat_map(|x| x.clean(cx)));
532 items.extend(self.enums.iter().flat_map(|x| x.clean(cx)));
533 items.extend(self.fns.iter().map(|x| x.clean(cx)));
534 items.extend(self.foreigns.iter().flat_map(|x| x.clean(cx)));
535 items.extend(self.mods.iter().map(|x| x.clean(cx)));
536 items.extend(self.typedefs.iter().map(|x| x.clean(cx)));
537 items.extend(self.statics.iter().map(|x| x.clean(cx)));
538 items.extend(self.constants.iter().map(|x| x.clean(cx)));
539 items.extend(self.traits.iter().map(|x| x.clean(cx)));
540 items.extend(self.impls.iter().flat_map(|x| x.clean(cx)));
541 items.extend(self.macros.iter().map(|x| x.clean(cx)));
543 cx.mod_ids.borrow_mut().pop();
545 // determine if we should display the inner contents or
546 // the outer `mod` item for the source code.
548 let cm = cx.sess().codemap();
549 let outer = cm.lookup_char_pos(self.where_outer.lo());
550 let inner = cm.lookup_char_pos(self.where_inner.lo());
551 if outer.file.start_pos == inner.file.start_pos {
555 // mod foo; (and a separate FileMap for the contents)
563 source: whence.clean(cx),
564 visibility: self.vis.clean(cx),
565 stability: self.stab.clean(cx),
566 deprecation: self.depr.clean(cx),
567 def_id: cx.tcx.hir.local_def_id(self.id),
568 inner: ModuleItem(Module {
569 is_crate: self.is_crate,
576 pub struct ListAttributesIter<'a> {
577 attrs: slice::Iter<'a, ast::Attribute>,
578 current_list: vec::IntoIter<ast::NestedMetaItem>,
582 impl<'a> Iterator for ListAttributesIter<'a> {
583 type Item = ast::NestedMetaItem;
585 fn next(&mut self) -> Option<Self::Item> {
586 if let Some(nested) = self.current_list.next() {
590 for attr in &mut self.attrs {
591 if let Some(list) = attr.meta_item_list() {
592 if attr.check_name(self.name) {
593 self.current_list = list.into_iter();
594 if let Some(nested) = self.current_list.next() {
604 fn size_hint(&self) -> (usize, Option<usize>) {
605 let lower = self.current_list.len();
610 pub trait AttributesExt {
611 /// Finds an attribute as List and returns the list of attributes nested inside.
612 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a>;
615 impl AttributesExt for [ast::Attribute] {
616 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a> {
619 current_list: Vec::new().into_iter(),
625 pub trait NestedAttributesExt {
626 /// Returns whether the attribute list contains a specific `Word`
627 fn has_word(self, word: &str) -> bool;
630 impl<I: IntoIterator<Item=ast::NestedMetaItem>> NestedAttributesExt for I {
631 fn has_word(self, word: &str) -> bool {
632 self.into_iter().any(|attr| attr.is_word() && attr.check_name(word))
636 /// A portion of documentation, extracted from a `#[doc]` attribute.
638 /// Each variant contains the line number within the complete doc-comment where the fragment
639 /// starts, as well as the Span where the corresponding doc comment or attribute is located.
641 /// Included files are kept separate from inline doc comments so that proper line-number
642 /// information can be given when a doctest fails. Sugared doc comments and "raw" doc comments are
643 /// kept separate because of issue #42760.
644 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
645 pub enum DocFragment {
646 // FIXME #44229 (misdreavus): sugared and raw doc comments can be brought back together once
647 // hoedown is completely removed from rustdoc.
648 /// A doc fragment created from a `///` or `//!` doc comment.
649 SugaredDoc(usize, syntax_pos::Span, String),
650 /// A doc fragment created from a "raw" `#[doc=""]` attribute.
651 RawDoc(usize, syntax_pos::Span, String),
652 /// A doc fragment created from a `#[doc(include="filename")]` attribute. Contains both the
653 /// given filename and the file contents.
654 Include(usize, syntax_pos::Span, String, String),
658 pub fn as_str(&self) -> &str {
660 DocFragment::SugaredDoc(_, _, ref s) => &s[..],
661 DocFragment::RawDoc(_, _, ref s) => &s[..],
662 DocFragment::Include(_, _, _, ref s) => &s[..],
666 pub fn span(&self) -> syntax_pos::Span {
668 DocFragment::SugaredDoc(_, span, _) |
669 DocFragment::RawDoc(_, span, _) |
670 DocFragment::Include(_, span, _, _) => span,
675 impl<'a> FromIterator<&'a DocFragment> for String {
676 fn from_iter<T>(iter: T) -> Self
678 T: IntoIterator<Item = &'a DocFragment>
680 iter.into_iter().fold(String::new(), |mut acc, frag| {
685 DocFragment::SugaredDoc(_, _, ref docs)
686 | DocFragment::RawDoc(_, _, ref docs)
687 | DocFragment::Include(_, _, _, ref docs) =>
696 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Default, Hash)]
697 pub struct Attributes {
698 pub doc_strings: Vec<DocFragment>,
699 pub other_attrs: Vec<ast::Attribute>,
700 pub cfg: Option<Rc<Cfg>>,
701 pub span: Option<syntax_pos::Span>,
702 /// map from Rust paths to resolved defs and potential URL fragments
703 pub links: Vec<(String, Option<DefId>, Option<String>)>,
707 /// Extracts the content from an attribute `#[doc(cfg(content))]`.
708 fn extract_cfg(mi: &ast::MetaItem) -> Option<&ast::MetaItem> {
709 use syntax::ast::NestedMetaItemKind::MetaItem;
711 if let ast::MetaItemKind::List(ref nmis) = mi.node {
713 if let MetaItem(ref cfg_mi) = nmis[0].node {
714 if cfg_mi.check_name("cfg") {
715 if let ast::MetaItemKind::List(ref cfg_nmis) = cfg_mi.node {
716 if cfg_nmis.len() == 1 {
717 if let MetaItem(ref content_mi) = cfg_nmis[0].node {
718 return Some(content_mi);
730 /// Reads a `MetaItem` from within an attribute, looks for whether it is a
731 /// `#[doc(include="file")]`, and returns the filename and contents of the file as loaded from
733 fn extract_include(mi: &ast::MetaItem)
734 -> Option<(String, String)>
736 mi.meta_item_list().and_then(|list| {
738 if meta.check_name("include") {
739 // the actual compiled `#[doc(include="filename")]` gets expanded to
740 // `#[doc(include(file="filename", contents="file contents")]` so we need to
741 // look for that instead
742 return meta.meta_item_list().and_then(|list| {
743 let mut filename: Option<String> = None;
744 let mut contents: Option<String> = None;
747 if it.check_name("file") {
748 if let Some(name) = it.value_str() {
749 filename = Some(name.to_string());
751 } else if it.check_name("contents") {
752 if let Some(docs) = it.value_str() {
753 contents = Some(docs.to_string());
758 if let (Some(filename), Some(contents)) = (filename, contents) {
759 Some((filename, contents))
771 pub fn has_doc_flag(&self, flag: &str) -> bool {
772 for attr in &self.other_attrs {
773 if !attr.check_name("doc") { continue; }
775 if let Some(items) = attr.meta_item_list() {
776 if items.iter().filter_map(|i| i.meta_item()).any(|it| it.check_name(flag)) {
785 pub fn from_ast(diagnostic: &::errors::Handler,
786 attrs: &[ast::Attribute]) -> Attributes {
787 let mut doc_strings = vec![];
789 let mut cfg = Cfg::True;
790 let mut doc_line = 0;
792 let other_attrs = attrs.iter().filter_map(|attr| {
793 attr.with_desugared_doc(|attr| {
794 if attr.check_name("doc") {
795 if let Some(mi) = attr.meta() {
796 if let Some(value) = mi.value_str() {
797 // Extracted #[doc = "..."]
798 let value = value.to_string();
800 doc_line += value.lines().count();
802 if attr.is_sugared_doc {
803 doc_strings.push(DocFragment::SugaredDoc(line, attr.span, value));
805 doc_strings.push(DocFragment::RawDoc(line, attr.span, value));
809 sp = Some(attr.span);
812 } else if let Some(cfg_mi) = Attributes::extract_cfg(&mi) {
813 // Extracted #[doc(cfg(...))]
814 match Cfg::parse(cfg_mi) {
815 Ok(new_cfg) => cfg &= new_cfg,
816 Err(e) => diagnostic.span_err(e.span, e.msg),
819 } else if let Some((filename, contents)) = Attributes::extract_include(&mi)
822 doc_line += contents.lines().count();
823 doc_strings.push(DocFragment::Include(line,
834 // treat #[target_feature(enable = "feat")] attributes as if they were
835 // #[doc(cfg(target_feature = "feat"))] attributes as well
836 for attr in attrs.lists("target_feature") {
837 if attr.check_name("enable") {
838 if let Some(feat) = attr.value_str() {
839 let meta = attr::mk_name_value_item_str(Ident::from_str("target_feature"),
840 dummy_spanned(feat));
841 if let Ok(feat_cfg) = Cfg::parse(&meta) {
851 cfg: if cfg == Cfg::True { None } else { Some(Rc::new(cfg)) },
857 /// Finds the `doc` attribute as a NameValue and returns the corresponding
859 pub fn doc_value<'a>(&'a self) -> Option<&'a str> {
860 self.doc_strings.first().map(|s| s.as_str())
863 /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined
865 pub fn collapsed_doc_value(&self) -> Option<String> {
866 if !self.doc_strings.is_empty() {
867 Some(self.doc_strings.iter().collect())
873 /// Get links as a vector
875 /// Cache must be populated before call
876 pub fn links(&self, krate: &CrateNum) -> Vec<(String, String)> {
877 use html::format::href;
878 self.links.iter().filter_map(|&(ref s, did, ref fragment)| {
881 if let Some((mut href, ..)) = href(did) {
882 if let Some(ref fragment) = *fragment {
884 href.push_str(fragment);
886 Some((s.clone(), href))
892 if let Some(ref fragment) = *fragment {
894 let url = match cache.extern_locations.get(krate) {
895 Some(&(_, ref src, ExternalLocation::Local)) =>
896 src.to_str().expect("invalid file path"),
897 Some(&(_, _, ExternalLocation::Remote(ref s))) => s,
898 Some(&(_, _, ExternalLocation::Unknown)) | None =>
899 "https://doc.rust-lang.org/nightly",
901 // This is a primitive so the url is done "by hand".
903 format!("{}{}std/primitive.{}.html",
905 if !url.ends_with('/') { "/" } else { "" },
908 panic!("This isn't a primitive?!");
916 impl AttributesExt for Attributes {
917 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a> {
918 self.other_attrs.lists(name)
922 /// Given a def, returns its name and disambiguator
923 /// for a value namespace
925 /// Returns None for things which cannot be ambiguous since
926 /// they exist in both namespaces (structs and modules)
927 fn value_ns_kind(def: Def, path_str: &str) -> Option<(&'static str, String)> {
929 // structs, variants, and mods exist in both namespaces. skip them
930 Def::StructCtor(..) | Def::Mod(..) | Def::Variant(..) | Def::VariantCtor(..) => None,
932 => Some(("function", format!("{}()", path_str))),
934 => Some(("method", format!("{}()", path_str))),
936 => Some(("const", format!("const@{}", path_str))),
938 => Some(("static", format!("static@{}", path_str))),
939 _ => Some(("value", format!("value@{}", path_str))),
943 /// Given a def, returns its name, the article to be used, and a disambiguator
944 /// for the type namespace
945 fn type_ns_kind(def: Def, path_str: &str) -> (&'static str, &'static str, String) {
946 let (kind, article) = match def {
947 // we can still have non-tuple structs
948 Def::Struct(..) => ("struct", "a"),
949 Def::Enum(..) => ("enum", "an"),
950 Def::Trait(..) => ("trait", "a"),
951 Def::Union(..) => ("union", "a"),
954 (kind, article, format!("{}@{}", kind, path_str))
957 fn ambiguity_error(cx: &DocContext, attrs: &Attributes,
959 article1: &str, kind1: &str, disambig1: &str,
960 article2: &str, kind2: &str, disambig2: &str) {
961 let sp = attrs.doc_strings.first()
962 .map_or(DUMMY_SP, |a| a.span());
964 .struct_span_warn(sp,
965 &format!("`{}` is both {} {} and {} {}",
966 path_str, article1, kind1,
968 .help(&format!("try `{}` if you want to select the {}, \
969 or `{}` if you want to \
971 disambig1, kind1, disambig2,
976 /// Given an enum variant's def, return the def of its enum and the associated fragment
977 fn handle_variant(cx: &DocContext, def: Def) -> Result<(Def, Option<String>), ()> {
978 use rustc::ty::DefIdTree;
980 let parent = if let Some(parent) = cx.tcx.parent(def.def_id()) {
985 let parent_def = Def::Enum(parent);
986 let variant = cx.tcx.expect_variant_def(def);
987 Ok((parent_def, Some(format!("{}.v", variant.name))))
990 const PRIMITIVES: &[(&str, Def)] = &[
991 ("u8", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U8))),
992 ("u16", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U16))),
993 ("u32", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U32))),
994 ("u64", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U64))),
995 ("u128", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U128))),
996 ("usize", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::Usize))),
997 ("i8", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I8))),
998 ("i16", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I16))),
999 ("i32", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I32))),
1000 ("i64", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I64))),
1001 ("i128", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I128))),
1002 ("isize", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::Isize))),
1003 ("f32", Def::PrimTy(hir::PrimTy::TyFloat(syntax::ast::FloatTy::F32))),
1004 ("f64", Def::PrimTy(hir::PrimTy::TyFloat(syntax::ast::FloatTy::F64))),
1005 ("str", Def::PrimTy(hir::PrimTy::TyStr)),
1006 ("bool", Def::PrimTy(hir::PrimTy::TyBool)),
1007 ("char", Def::PrimTy(hir::PrimTy::TyChar)),
1010 fn is_primitive(path_str: &str, is_val: bool) -> Option<Def> {
1014 PRIMITIVES.iter().find(|x| x.0 == path_str).map(|x| x.1)
1018 /// Resolve a given string as a path, along with whether or not it is
1019 /// in the value namespace. Also returns an optional URL fragment in the case
1020 /// of variants and methods
1021 fn resolve(cx: &DocContext, path_str: &str, is_val: bool) -> Result<(Def, Option<String>), ()> {
1022 // In case we're in a module, try to resolve the relative
1024 if let Some(id) = cx.mod_ids.borrow().last() {
1025 let result = cx.resolver.borrow_mut()
1028 resolver.resolve_str_path_error(DUMMY_SP,
1032 if let Ok(result) = result {
1033 // In case this is a trait item, skip the
1034 // early return and try looking for the trait
1035 let value = match result.def {
1036 Def::Method(_) | Def::AssociatedConst(_) => true,
1037 Def::AssociatedTy(_) => false,
1038 Def::Variant(_) => return handle_variant(cx, result.def),
1039 // not a trait item, just return what we found
1040 _ => return Ok((result.def, None))
1043 if value != is_val {
1046 } else if let Some(prim) = is_primitive(path_str, is_val) {
1047 return Ok((prim, Some(path_str.to_owned())))
1049 // If resolution failed, it may still be a method
1050 // because methods are not handled by the resolver
1051 // If so, bail when we're not looking for a value
1057 // Try looking for methods and associated items
1058 let mut split = path_str.rsplitn(2, "::");
1059 let mut item_name = if let Some(first) = split.next() {
1065 let mut path = if let Some(second) = split.next() {
1071 let ty = cx.resolver.borrow_mut()
1074 resolver.resolve_str_path_error(DUMMY_SP, &path, false)
1077 Def::Struct(did) | Def::Union(did) | Def::Enum(did) | Def::TyAlias(did) => {
1078 let item = cx.tcx.inherent_impls(did).iter()
1079 .flat_map(|imp| cx.tcx.associated_items(*imp))
1080 .find(|item| item.name == item_name);
1081 if let Some(item) = item {
1082 let out = match item.kind {
1083 ty::AssociatedKind::Method if is_val => "method",
1084 ty::AssociatedKind::Const if is_val => "associatedconstant",
1087 Ok((ty.def, Some(format!("{}.{}", out, item_name))))
1089 let is_enum = match ty.def {
1090 Def::Enum(_) => true,
1093 let elem = if is_enum {
1094 cx.tcx.adt_def(did).all_fields().find(|item| item.name == item_name)
1100 .find(|item| item.name == item_name)
1102 if let Some(item) = elem {
1104 Some(format!("{}.{}",
1105 if is_enum { "variant" } else { "structfield" },
1112 Def::Trait(did) => {
1113 let item = cx.tcx.associated_item_def_ids(did).iter()
1114 .map(|item| cx.tcx.associated_item(*item))
1115 .find(|item| item.name == item_name);
1116 if let Some(item) = item {
1117 let kind = match item.kind {
1118 ty::AssociatedKind::Const if is_val => "associatedconstant",
1119 ty::AssociatedKind::Type if !is_val => "associatedtype",
1120 ty::AssociatedKind::Method if is_val => {
1121 if item.defaultness.has_value() {
1130 Ok((ty.def, Some(format!("{}.{}", kind, item_name))))
1142 /// Resolve a string as a macro
1143 fn macro_resolve(cx: &DocContext, path_str: &str) -> Option<Def> {
1144 use syntax::ext::base::{MacroKind, SyntaxExtension};
1145 use syntax::ext::hygiene::Mark;
1146 let segment = ast::PathSegment::from_ident(Ident::from_str(path_str));
1147 let path = ast::Path { segments: vec![segment], span: DUMMY_SP };
1148 let mut resolver = cx.resolver.borrow_mut();
1149 let mark = Mark::root();
1151 .resolve_macro_to_def_inner(mark, &path, MacroKind::Bang, false);
1152 if let Ok(def) = res {
1153 if let SyntaxExtension::DeclMacro(..) = *resolver.get_macro(def) {
1158 } else if let Some(def) = resolver.all_macros.get(&Symbol::intern(path_str)) {
1167 /// can be either value or type, not a macro
1171 /// values, functions, consts, statics, everything in the value namespace
1173 /// types, traits, everything in the type namespace
1177 fn resolution_failure(cx: &DocContext, path_str: &str) {
1178 cx.sess().warn(&format!("[{}] cannot be resolved, ignoring it...", path_str));
1181 impl Clean<Attributes> for [ast::Attribute] {
1182 fn clean(&self, cx: &DocContext) -> Attributes {
1183 let mut attrs = Attributes::from_ast(cx.sess().diagnostic(), self);
1185 if UnstableFeatures::from_environment().is_nightly_build() {
1186 let dox = attrs.collapsed_doc_value().unwrap_or_else(String::new);
1187 for ori_link in markdown_links(&dox) {
1188 // bail early for real links
1189 if ori_link.contains('/') {
1192 let link = ori_link.replace("`", "");
1193 let (def, fragment) = {
1194 let mut kind = PathKind::Unknown;
1195 let path_str = if let Some(prefix) =
1196 ["struct@", "enum@", "type@",
1197 "trait@", "union@"].iter()
1198 .find(|p| link.starts_with(**p)) {
1199 kind = PathKind::Type;
1200 link.trim_left_matches(prefix)
1201 } else if let Some(prefix) =
1202 ["const@", "static@",
1203 "value@", "function@", "mod@",
1204 "fn@", "module@", "method@"]
1205 .iter().find(|p| link.starts_with(**p)) {
1206 kind = PathKind::Value;
1207 link.trim_left_matches(prefix)
1208 } else if link.ends_with("()") {
1209 kind = PathKind::Value;
1210 link.trim_right_matches("()")
1211 } else if link.starts_with("macro@") {
1212 kind = PathKind::Macro;
1213 link.trim_left_matches("macro@")
1214 } else if link.ends_with('!') {
1215 kind = PathKind::Macro;
1216 link.trim_right_matches('!')
1221 if path_str.contains(|ch: char| !(ch.is_alphanumeric() ||
1222 ch == ':' || ch == '_')) {
1227 PathKind::Value => {
1228 if let Ok(def) = resolve(cx, path_str, true) {
1231 resolution_failure(cx, path_str);
1232 // this could just be a normal link or a broken link
1233 // we could potentially check if something is
1234 // "intra-doc-link-like" and warn in that case
1239 if let Ok(def) = resolve(cx, path_str, false) {
1242 resolution_failure(cx, path_str);
1243 // this could just be a normal link
1247 PathKind::Unknown => {
1249 if let Some(macro_def) = macro_resolve(cx, path_str) {
1250 if let Ok(type_def) = resolve(cx, path_str, false) {
1251 let (type_kind, article, type_disambig)
1252 = type_ns_kind(type_def.0, path_str);
1253 ambiguity_error(cx, &attrs, path_str,
1254 article, type_kind, &type_disambig,
1255 "a", "macro", &format!("macro@{}", path_str));
1257 } else if let Ok(value_def) = resolve(cx, path_str, true) {
1258 let (value_kind, value_disambig)
1259 = value_ns_kind(value_def.0, path_str)
1260 .expect("struct and mod cases should have been \
1261 caught in previous branch");
1262 ambiguity_error(cx, &attrs, path_str,
1263 "a", value_kind, &value_disambig,
1264 "a", "macro", &format!("macro@{}", path_str));
1267 } else if let Ok(type_def) = resolve(cx, path_str, false) {
1268 // It is imperative we search for not-a-value first
1269 // Otherwise we will find struct ctors for when we are looking
1270 // for structs, and the link won't work.
1271 // if there is something in both namespaces
1272 if let Ok(value_def) = resolve(cx, path_str, true) {
1273 let kind = value_ns_kind(value_def.0, path_str);
1274 if let Some((value_kind, value_disambig)) = kind {
1275 let (type_kind, article, type_disambig)
1276 = type_ns_kind(type_def.0, path_str);
1277 ambiguity_error(cx, &attrs, path_str,
1278 article, type_kind, &type_disambig,
1279 "a", value_kind, &value_disambig);
1284 } else if let Ok(value_def) = resolve(cx, path_str, true) {
1287 resolution_failure(cx, path_str);
1288 // this could just be a normal link
1292 PathKind::Macro => {
1293 if let Some(def) = macro_resolve(cx, path_str) {
1296 resolution_failure(cx, path_str);
1303 if let Def::PrimTy(_) = def {
1304 attrs.links.push((ori_link, None, fragment));
1306 let id = register_def(cx, def);
1307 attrs.links.push((ori_link, Some(id), fragment));
1311 cx.sess().abort_if_errors();
1318 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1319 pub struct TyParam {
1322 pub bounds: Vec<TyParamBound>,
1323 pub default: Option<Type>,
1324 pub synthetic: Option<hir::SyntheticTyParamKind>,
1327 impl Clean<TyParam> for hir::TyParam {
1328 fn clean(&self, cx: &DocContext) -> TyParam {
1330 name: self.name.clean(cx),
1331 did: cx.tcx.hir.local_def_id(self.id),
1332 bounds: self.bounds.clean(cx),
1333 default: self.default.clean(cx),
1334 synthetic: self.synthetic,
1339 impl<'tcx> Clean<TyParam> for ty::TypeParameterDef {
1340 fn clean(&self, cx: &DocContext) -> TyParam {
1341 cx.renderinfo.borrow_mut().external_typarams.insert(self.def_id, self.name.clean(cx));
1343 name: self.name.clean(cx),
1345 bounds: vec![], // these are filled in from the where-clauses
1346 default: if self.has_default {
1347 Some(cx.tcx.type_of(self.def_id).clean(cx))
1356 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1357 pub enum TyParamBound {
1358 RegionBound(Lifetime),
1359 TraitBound(PolyTrait, hir::TraitBoundModifier)
1363 fn maybe_sized(cx: &DocContext) -> TyParamBound {
1364 let did = cx.tcx.require_lang_item(lang_items::SizedTraitLangItem);
1365 let empty = cx.tcx.intern_substs(&[]);
1366 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
1367 Some(did), false, vec![], empty);
1368 inline::record_extern_fqn(cx, did, TypeKind::Trait);
1369 TraitBound(PolyTrait {
1370 trait_: ResolvedPath {
1376 generic_params: Vec::new(),
1377 }, hir::TraitBoundModifier::Maybe)
1380 fn is_sized_bound(&self, cx: &DocContext) -> bool {
1381 use rustc::hir::TraitBoundModifier as TBM;
1382 if let TyParamBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self {
1383 if trait_.def_id() == cx.tcx.lang_items().sized_trait() {
1390 fn get_poly_trait(&self) -> Option<PolyTrait> {
1391 if let TyParamBound::TraitBound(ref p, _) = *self {
1392 return Some(p.clone())
1397 fn get_trait_type(&self) -> Option<Type> {
1399 if let TyParamBound::TraitBound(PolyTrait { ref trait_, .. }, _) = *self {
1400 return Some(trait_.clone());
1406 impl Clean<TyParamBound> for hir::TyParamBound {
1407 fn clean(&self, cx: &DocContext) -> TyParamBound {
1409 hir::RegionTyParamBound(lt) => RegionBound(lt.clean(cx)),
1410 hir::TraitTyParamBound(ref t, modifier) => TraitBound(t.clean(cx), modifier),
1415 fn external_path_params(cx: &DocContext, trait_did: Option<DefId>, has_self: bool,
1416 bindings: Vec<TypeBinding>, substs: &Substs) -> PathParameters {
1417 let lifetimes = substs.regions().filter_map(|v| v.clean(cx)).collect();
1418 let types = substs.types().skip(has_self as usize).collect::<Vec<_>>();
1421 // Attempt to sugar an external path like Fn<(A, B,), C> to Fn(A, B) -> C
1422 Some(did) if cx.tcx.lang_items().fn_trait_kind(did).is_some() => {
1423 assert_eq!(types.len(), 1);
1424 let inputs = match types[0].sty {
1425 ty::TyTuple(ref tys) => tys.iter().map(|t| t.clean(cx)).collect(),
1427 return PathParameters::AngleBracketed {
1429 types: types.clean(cx),
1435 // FIXME(#20299) return type comes from a projection now
1436 // match types[1].sty {
1437 // ty::TyTuple(ref v) if v.is_empty() => None, // -> ()
1438 // _ => Some(types[1].clean(cx))
1440 PathParameters::Parenthesized {
1446 PathParameters::AngleBracketed {
1448 types: types.clean(cx),
1455 // trait_did should be set to a trait's DefId if called on a TraitRef, in order to sugar
1456 // from Fn<(A, B,), C> to Fn(A, B) -> C
1457 fn external_path(cx: &DocContext, name: &str, trait_did: Option<DefId>, has_self: bool,
1458 bindings: Vec<TypeBinding>, substs: &Substs) -> Path {
1462 segments: vec![PathSegment {
1463 name: name.to_string(),
1464 params: external_path_params(cx, trait_did, has_self, bindings, substs)
1469 impl<'a, 'tcx> Clean<TyParamBound> for (&'a ty::TraitRef<'tcx>, Vec<TypeBinding>) {
1470 fn clean(&self, cx: &DocContext) -> TyParamBound {
1471 let (trait_ref, ref bounds) = *self;
1472 inline::record_extern_fqn(cx, trait_ref.def_id, TypeKind::Trait);
1473 let path = external_path(cx, &cx.tcx.item_name(trait_ref.def_id).as_str(),
1474 Some(trait_ref.def_id), true, bounds.clone(), trait_ref.substs);
1476 debug!("ty::TraitRef\n subst: {:?}\n", trait_ref.substs);
1478 // collect any late bound regions
1479 let mut late_bounds = vec![];
1480 for ty_s in trait_ref.input_types().skip(1) {
1481 if let ty::TyTuple(ts) = ty_s.sty {
1483 if let ty::TyRef(ref reg, _, _) = ty_s.sty {
1484 if let &ty::RegionKind::ReLateBound(..) = *reg {
1485 debug!(" hit an ReLateBound {:?}", reg);
1486 if let Some(lt) = reg.clean(cx) {
1487 late_bounds.push(GenericParam::Lifetime(lt));
1497 trait_: ResolvedPath {
1500 did: trait_ref.def_id,
1503 generic_params: late_bounds,
1505 hir::TraitBoundModifier::None
1510 impl<'tcx> Clean<TyParamBound> for ty::TraitRef<'tcx> {
1511 fn clean(&self, cx: &DocContext) -> TyParamBound {
1512 (self, vec![]).clean(cx)
1516 impl<'tcx> Clean<Option<Vec<TyParamBound>>> for Substs<'tcx> {
1517 fn clean(&self, cx: &DocContext) -> Option<Vec<TyParamBound>> {
1518 let mut v = Vec::new();
1519 v.extend(self.regions().filter_map(|r| r.clean(cx))
1521 v.extend(self.types().map(|t| TraitBound(PolyTrait {
1522 trait_: t.clean(cx),
1523 generic_params: Vec::new(),
1524 }, hir::TraitBoundModifier::None)));
1525 if !v.is_empty() {Some(v)} else {None}
1529 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1530 pub struct Lifetime(String);
1533 pub fn get_ref<'a>(&'a self) -> &'a str {
1534 let Lifetime(ref s) = *self;
1539 pub fn statik() -> Lifetime {
1540 Lifetime("'static".to_string())
1544 impl Clean<Lifetime> for hir::Lifetime {
1545 fn clean(&self, cx: &DocContext) -> Lifetime {
1546 if self.id != ast::DUMMY_NODE_ID {
1547 let hir_id = cx.tcx.hir.node_to_hir_id(self.id);
1548 let def = cx.tcx.named_region(hir_id);
1550 Some(rl::Region::EarlyBound(_, node_id, _)) |
1551 Some(rl::Region::LateBound(_, node_id, _)) |
1552 Some(rl::Region::Free(_, node_id)) => {
1553 if let Some(lt) = cx.lt_substs.borrow().get(&node_id).cloned() {
1560 Lifetime(self.name.name().to_string())
1564 impl Clean<Lifetime> for hir::LifetimeDef {
1565 fn clean(&self, _: &DocContext) -> Lifetime {
1566 if self.bounds.len() > 0 {
1567 let mut s = format!("{}: {}",
1568 self.lifetime.name.name(),
1569 self.bounds[0].name.name());
1570 for bound in self.bounds.iter().skip(1) {
1571 s.push_str(&format!(" + {}", bound.name.name()));
1575 Lifetime(self.lifetime.name.name().to_string())
1580 impl Clean<Lifetime> for ty::RegionParameterDef {
1581 fn clean(&self, _: &DocContext) -> Lifetime {
1582 Lifetime(self.name.to_string())
1586 impl Clean<Option<Lifetime>> for ty::RegionKind {
1587 fn clean(&self, cx: &DocContext) -> Option<Lifetime> {
1589 ty::ReStatic => Some(Lifetime::statik()),
1590 ty::ReLateBound(_, ty::BrNamed(_, name)) => Some(Lifetime(name.to_string())),
1591 ty::ReEarlyBound(ref data) => Some(Lifetime(data.name.clean(cx))),
1593 ty::ReLateBound(..) |
1597 ty::ReSkolemized(..) |
1599 ty::ReClosureBound(_) |
1600 ty::ReCanonical(_) |
1601 ty::ReErased => None
1606 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1607 pub enum WherePredicate {
1608 BoundPredicate { ty: Type, bounds: Vec<TyParamBound> },
1609 RegionPredicate { lifetime: Lifetime, bounds: Vec<Lifetime>},
1610 EqPredicate { lhs: Type, rhs: Type },
1613 impl Clean<WherePredicate> for hir::WherePredicate {
1614 fn clean(&self, cx: &DocContext) -> WherePredicate {
1616 hir::WherePredicate::BoundPredicate(ref wbp) => {
1617 WherePredicate::BoundPredicate {
1618 ty: wbp.bounded_ty.clean(cx),
1619 bounds: wbp.bounds.clean(cx)
1623 hir::WherePredicate::RegionPredicate(ref wrp) => {
1624 WherePredicate::RegionPredicate {
1625 lifetime: wrp.lifetime.clean(cx),
1626 bounds: wrp.bounds.clean(cx)
1630 hir::WherePredicate::EqPredicate(ref wrp) => {
1631 WherePredicate::EqPredicate {
1632 lhs: wrp.lhs_ty.clean(cx),
1633 rhs: wrp.rhs_ty.clean(cx)
1640 impl<'a> Clean<WherePredicate> for ty::Predicate<'a> {
1641 fn clean(&self, cx: &DocContext) -> WherePredicate {
1642 use rustc::ty::Predicate;
1645 Predicate::Trait(ref pred) => pred.clean(cx),
1646 Predicate::Subtype(ref pred) => pred.clean(cx),
1647 Predicate::RegionOutlives(ref pred) => pred.clean(cx),
1648 Predicate::TypeOutlives(ref pred) => pred.clean(cx),
1649 Predicate::Projection(ref pred) => pred.clean(cx),
1650 Predicate::WellFormed(_) => panic!("not user writable"),
1651 Predicate::ObjectSafe(_) => panic!("not user writable"),
1652 Predicate::ClosureKind(..) => panic!("not user writable"),
1653 Predicate::ConstEvaluatable(..) => panic!("not user writable"),
1658 impl<'a> Clean<WherePredicate> for ty::TraitPredicate<'a> {
1659 fn clean(&self, cx: &DocContext) -> WherePredicate {
1660 WherePredicate::BoundPredicate {
1661 ty: self.trait_ref.self_ty().clean(cx),
1662 bounds: vec![self.trait_ref.clean(cx)]
1667 impl<'tcx> Clean<WherePredicate> for ty::SubtypePredicate<'tcx> {
1668 fn clean(&self, _cx: &DocContext) -> WherePredicate {
1669 panic!("subtype predicates are an internal rustc artifact \
1670 and should not be seen by rustdoc")
1674 impl<'tcx> Clean<WherePredicate> for ty::OutlivesPredicate<ty::Region<'tcx>, ty::Region<'tcx>> {
1675 fn clean(&self, cx: &DocContext) -> WherePredicate {
1676 let ty::OutlivesPredicate(ref a, ref b) = *self;
1677 WherePredicate::RegionPredicate {
1678 lifetime: a.clean(cx).unwrap(),
1679 bounds: vec![b.clean(cx).unwrap()]
1684 impl<'tcx> Clean<WherePredicate> for ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>> {
1685 fn clean(&self, cx: &DocContext) -> WherePredicate {
1686 let ty::OutlivesPredicate(ref ty, ref lt) = *self;
1688 WherePredicate::BoundPredicate {
1690 bounds: vec![TyParamBound::RegionBound(lt.clean(cx).unwrap())]
1695 impl<'tcx> Clean<WherePredicate> for ty::ProjectionPredicate<'tcx> {
1696 fn clean(&self, cx: &DocContext) -> WherePredicate {
1697 WherePredicate::EqPredicate {
1698 lhs: self.projection_ty.clean(cx),
1699 rhs: self.ty.clean(cx)
1704 impl<'tcx> Clean<Type> for ty::ProjectionTy<'tcx> {
1705 fn clean(&self, cx: &DocContext) -> Type {
1706 let trait_ = match self.trait_ref(cx.tcx).clean(cx) {
1707 TyParamBound::TraitBound(t, _) => t.trait_,
1708 TyParamBound::RegionBound(_) => {
1709 panic!("cleaning a trait got a region")
1713 name: cx.tcx.associated_item(self.item_def_id).name.clean(cx),
1714 self_type: box self.self_ty().clean(cx),
1720 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1721 pub enum GenericParam {
1727 pub fn is_synthetic_type_param(&self) -> bool {
1728 if let GenericParam::Type(ref t) = *self {
1729 t.synthetic.is_some()
1736 impl Clean<GenericParam> for hir::GenericParam {
1737 fn clean(&self, cx: &DocContext) -> GenericParam {
1739 hir::GenericParam::Lifetime(ref l) => GenericParam::Lifetime(l.clean(cx)),
1740 hir::GenericParam::Type(ref t) => GenericParam::Type(t.clean(cx)),
1745 // maybe use a Generic enum and use Vec<Generic>?
1746 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Default, Hash)]
1747 pub struct Generics {
1748 pub params: Vec<GenericParam>,
1749 pub where_predicates: Vec<WherePredicate>,
1752 impl Clean<Generics> for hir::Generics {
1753 fn clean(&self, cx: &DocContext) -> Generics {
1754 let mut params = Vec::with_capacity(self.params.len());
1755 for p in &self.params {
1756 let p = p.clean(cx);
1757 if let GenericParam::Type(ref tp) = p {
1758 if tp.synthetic == Some(hir::SyntheticTyParamKind::ImplTrait) {
1759 cx.impl_trait_bounds.borrow_mut().insert(tp.did, tp.bounds.clone());
1764 let mut g = Generics {
1766 where_predicates: self.where_clause.predicates.clean(cx)
1769 // Some duplicates are generated for ?Sized bounds between type params and where
1770 // predicates. The point in here is to move the bounds definitions from type params
1771 // to where predicates when such cases occur.
1772 for where_pred in &mut g.where_predicates {
1774 WherePredicate::BoundPredicate { ty: Generic(ref name), ref mut bounds } => {
1775 if bounds.is_empty() {
1776 for param in &mut g.params {
1777 if let GenericParam::Type(ref mut type_param) = *param {
1778 if &type_param.name == name {
1779 mem::swap(bounds, &mut type_param.bounds);
1793 impl<'a, 'tcx> Clean<Generics> for (&'a ty::Generics,
1794 &'a ty::GenericPredicates<'tcx>) {
1795 fn clean(&self, cx: &DocContext) -> Generics {
1796 use self::WherePredicate as WP;
1798 let (gens, preds) = *self;
1800 // Bounds in the type_params and lifetimes fields are repeated in the
1801 // predicates field (see rustc_typeck::collect::ty_generics), so remove
1803 let stripped_typarams = gens.types.iter().filter_map(|tp| {
1804 if tp.name == keywords::SelfType.name().as_str() {
1805 assert_eq!(tp.index, 0);
1810 }).collect::<Vec<_>>();
1812 let mut where_predicates = preds.predicates.to_vec().clean(cx);
1814 // Type parameters and have a Sized bound by default unless removed with
1815 // ?Sized. Scan through the predicates and mark any type parameter with
1816 // a Sized bound, removing the bounds as we find them.
1818 // Note that associated types also have a sized bound by default, but we
1819 // don't actually know the set of associated types right here so that's
1820 // handled in cleaning associated types
1821 let mut sized_params = FxHashSet();
1822 where_predicates.retain(|pred| {
1824 WP::BoundPredicate { ty: Generic(ref g), ref bounds } => {
1825 if bounds.iter().any(|b| b.is_sized_bound(cx)) {
1826 sized_params.insert(g.clone());
1836 // Run through the type parameters again and insert a ?Sized
1837 // unbound for any we didn't find to be Sized.
1838 for tp in &stripped_typarams {
1839 if !sized_params.contains(&tp.name) {
1840 where_predicates.push(WP::BoundPredicate {
1841 ty: Type::Generic(tp.name.clone()),
1842 bounds: vec![TyParamBound::maybe_sized(cx)],
1847 // It would be nice to collect all of the bounds on a type and recombine
1848 // them if possible, to avoid e.g. `where T: Foo, T: Bar, T: Sized, T: 'a`
1849 // and instead see `where T: Foo + Bar + Sized + 'a`
1852 params: gens.regions
1855 .map(|lp| GenericParam::Lifetime(lp))
1857 simplify::ty_params(stripped_typarams)
1859 .map(|tp| GenericParam::Type(tp))
1862 where_predicates: simplify::where_clauses(cx, where_predicates),
1867 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1869 pub generics: Generics,
1870 pub unsafety: hir::Unsafety,
1871 pub constness: hir::Constness,
1876 impl<'a> Clean<Method> for (&'a hir::MethodSig, &'a hir::Generics, hir::BodyId) {
1877 fn clean(&self, cx: &DocContext) -> Method {
1878 let (generics, decl) = enter_impl_trait(cx, || {
1879 (self.1.clean(cx), (&*self.0.decl, self.2).clean(cx))
1884 unsafety: self.0.unsafety,
1885 constness: self.0.constness,
1891 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1892 pub struct TyMethod {
1893 pub unsafety: hir::Unsafety,
1895 pub generics: Generics,
1899 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1900 pub struct Function {
1902 pub generics: Generics,
1903 pub unsafety: hir::Unsafety,
1904 pub constness: hir::Constness,
1908 impl Clean<Item> for doctree::Function {
1909 fn clean(&self, cx: &DocContext) -> Item {
1910 let (generics, decl) = enter_impl_trait(cx, || {
1911 (self.generics.clean(cx), (&self.decl, self.body).clean(cx))
1914 name: Some(self.name.clean(cx)),
1915 attrs: self.attrs.clean(cx),
1916 source: self.whence.clean(cx),
1917 visibility: self.vis.clean(cx),
1918 stability: self.stab.clean(cx),
1919 deprecation: self.depr.clean(cx),
1920 def_id: cx.tcx.hir.local_def_id(self.id),
1921 inner: FunctionItem(Function {
1924 unsafety: self.unsafety,
1925 constness: self.constness,
1932 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1934 pub inputs: Arguments,
1935 pub output: FunctionRetTy,
1937 pub attrs: Attributes,
1941 pub fn has_self(&self) -> bool {
1942 self.inputs.values.len() > 0 && self.inputs.values[0].name == "self"
1945 pub fn self_type(&self) -> Option<SelfTy> {
1946 self.inputs.values.get(0).and_then(|v| v.to_self())
1950 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1951 pub struct Arguments {
1952 pub values: Vec<Argument>,
1955 impl<'a> Clean<Arguments> for (&'a [P<hir::Ty>], &'a [Spanned<ast::Name>]) {
1956 fn clean(&self, cx: &DocContext) -> Arguments {
1958 values: self.0.iter().enumerate().map(|(i, ty)| {
1959 let mut name = self.1.get(i).map(|n| n.node.to_string())
1960 .unwrap_or(String::new());
1961 if name.is_empty() {
1962 name = "_".to_string();
1966 type_: ty.clean(cx),
1973 impl<'a> Clean<Arguments> for (&'a [P<hir::Ty>], hir::BodyId) {
1974 fn clean(&self, cx: &DocContext) -> Arguments {
1975 let body = cx.tcx.hir.body(self.1);
1978 values: self.0.iter().enumerate().map(|(i, ty)| {
1980 name: name_from_pat(&body.arguments[i].pat),
1981 type_: ty.clean(cx),
1988 impl<'a, A: Copy> Clean<FnDecl> for (&'a hir::FnDecl, A)
1989 where (&'a [P<hir::Ty>], A): Clean<Arguments>
1991 fn clean(&self, cx: &DocContext) -> FnDecl {
1993 inputs: (&self.0.inputs[..], self.1).clean(cx),
1994 output: self.0.output.clean(cx),
1995 variadic: self.0.variadic,
1996 attrs: Attributes::default()
2001 impl<'a, 'tcx> Clean<FnDecl> for (DefId, ty::PolyFnSig<'tcx>) {
2002 fn clean(&self, cx: &DocContext) -> FnDecl {
2003 let (did, sig) = *self;
2004 let mut names = if cx.tcx.hir.as_local_node_id(did).is_some() {
2007 cx.tcx.fn_arg_names(did).into_iter()
2011 output: Return(sig.skip_binder().output().clean(cx)),
2012 attrs: Attributes::default(),
2013 variadic: sig.skip_binder().variadic,
2015 values: sig.skip_binder().inputs().iter().map(|t| {
2018 name: names.next().map_or("".to_string(), |name| name.to_string()),
2026 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2027 pub struct Argument {
2032 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Debug)]
2035 SelfBorrowed(Option<Lifetime>, Mutability),
2040 pub fn to_self(&self) -> Option<SelfTy> {
2041 if self.name != "self" {
2044 if self.type_.is_self_type() {
2045 return Some(SelfValue);
2048 BorrowedRef{ref lifetime, mutability, ref type_} if type_.is_self_type() => {
2049 Some(SelfBorrowed(lifetime.clone(), mutability))
2051 _ => Some(SelfExplicit(self.type_.clone()))
2056 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2057 pub enum FunctionRetTy {
2062 impl Clean<FunctionRetTy> for hir::FunctionRetTy {
2063 fn clean(&self, cx: &DocContext) -> FunctionRetTy {
2065 hir::Return(ref typ) => Return(typ.clean(cx)),
2066 hir::DefaultReturn(..) => DefaultReturn,
2071 impl GetDefId for FunctionRetTy {
2072 fn def_id(&self) -> Option<DefId> {
2074 Return(ref ty) => ty.def_id(),
2075 DefaultReturn => None,
2080 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
2083 pub unsafety: hir::Unsafety,
2084 pub items: Vec<Item>,
2085 pub generics: Generics,
2086 pub bounds: Vec<TyParamBound>,
2087 pub is_spotlight: bool,
2091 impl Clean<Item> for doctree::Trait {
2092 fn clean(&self, cx: &DocContext) -> Item {
2093 let attrs = self.attrs.clean(cx);
2094 let is_spotlight = attrs.has_doc_flag("spotlight");
2096 name: Some(self.name.clean(cx)),
2098 source: self.whence.clean(cx),
2099 def_id: cx.tcx.hir.local_def_id(self.id),
2100 visibility: self.vis.clean(cx),
2101 stability: self.stab.clean(cx),
2102 deprecation: self.depr.clean(cx),
2103 inner: TraitItem(Trait {
2104 auto: self.is_auto.clean(cx),
2105 unsafety: self.unsafety,
2106 items: self.items.clean(cx),
2107 generics: self.generics.clean(cx),
2108 bounds: self.bounds.clean(cx),
2109 is_spotlight: is_spotlight,
2110 is_auto: self.is_auto.clean(cx),
2116 impl Clean<bool> for hir::IsAuto {
2117 fn clean(&self, _: &DocContext) -> bool {
2119 hir::IsAuto::Yes => true,
2120 hir::IsAuto::No => false,
2125 impl Clean<Type> for hir::TraitRef {
2126 fn clean(&self, cx: &DocContext) -> Type {
2127 resolve_type(cx, self.path.clean(cx), self.ref_id)
2131 impl Clean<PolyTrait> for hir::PolyTraitRef {
2132 fn clean(&self, cx: &DocContext) -> PolyTrait {
2134 trait_: self.trait_ref.clean(cx),
2135 generic_params: self.bound_generic_params.clean(cx)
2140 impl Clean<Item> for hir::TraitItem {
2141 fn clean(&self, cx: &DocContext) -> Item {
2142 let inner = match self.node {
2143 hir::TraitItemKind::Const(ref ty, default) => {
2144 AssociatedConstItem(ty.clean(cx),
2145 default.map(|e| print_const_expr(cx, e)))
2147 hir::TraitItemKind::Method(ref sig, hir::TraitMethod::Provided(body)) => {
2148 MethodItem((sig, &self.generics, body).clean(cx))
2150 hir::TraitItemKind::Method(ref sig, hir::TraitMethod::Required(ref names)) => {
2151 let (generics, decl) = enter_impl_trait(cx, || {
2152 (self.generics.clean(cx), (&*sig.decl, &names[..]).clean(cx))
2154 TyMethodItem(TyMethod {
2155 unsafety: sig.unsafety.clone(),
2161 hir::TraitItemKind::Type(ref bounds, ref default) => {
2162 AssociatedTypeItem(bounds.clean(cx), default.clean(cx))
2166 name: Some(self.name.clean(cx)),
2167 attrs: self.attrs.clean(cx),
2168 source: self.span.clean(cx),
2169 def_id: cx.tcx.hir.local_def_id(self.id),
2171 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2172 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2178 impl Clean<Item> for hir::ImplItem {
2179 fn clean(&self, cx: &DocContext) -> Item {
2180 let inner = match self.node {
2181 hir::ImplItemKind::Const(ref ty, expr) => {
2182 AssociatedConstItem(ty.clean(cx),
2183 Some(print_const_expr(cx, expr)))
2185 hir::ImplItemKind::Method(ref sig, body) => {
2186 MethodItem((sig, &self.generics, body).clean(cx))
2188 hir::ImplItemKind::Type(ref ty) => TypedefItem(Typedef {
2189 type_: ty.clean(cx),
2190 generics: Generics::default(),
2194 name: Some(self.name.clean(cx)),
2195 source: self.span.clean(cx),
2196 attrs: self.attrs.clean(cx),
2197 def_id: cx.tcx.hir.local_def_id(self.id),
2198 visibility: self.vis.clean(cx),
2199 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2200 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2206 impl<'tcx> Clean<Item> for ty::AssociatedItem {
2207 fn clean(&self, cx: &DocContext) -> Item {
2208 let inner = match self.kind {
2209 ty::AssociatedKind::Const => {
2210 let ty = cx.tcx.type_of(self.def_id);
2211 let default = if self.defaultness.has_value() {
2212 Some(inline::print_inlined_const(cx, self.def_id))
2216 AssociatedConstItem(ty.clean(cx), default)
2218 ty::AssociatedKind::Method => {
2219 let generics = (cx.tcx.generics_of(self.def_id),
2220 &cx.tcx.predicates_of(self.def_id)).clean(cx);
2221 let sig = cx.tcx.fn_sig(self.def_id);
2222 let mut decl = (self.def_id, sig).clean(cx);
2224 if self.method_has_self_argument {
2225 let self_ty = match self.container {
2226 ty::ImplContainer(def_id) => {
2227 cx.tcx.type_of(def_id)
2229 ty::TraitContainer(_) => cx.tcx.mk_self_type()
2231 let self_arg_ty = *sig.input(0).skip_binder();
2232 if self_arg_ty == self_ty {
2233 decl.inputs.values[0].type_ = Generic(String::from("Self"));
2234 } else if let ty::TyRef(_, ty, _) = self_arg_ty.sty {
2236 match decl.inputs.values[0].type_ {
2237 BorrowedRef{ref mut type_, ..} => {
2238 **type_ = Generic(String::from("Self"))
2240 _ => unreachable!(),
2246 let provided = match self.container {
2247 ty::ImplContainer(_) => true,
2248 ty::TraitContainer(_) => self.defaultness.has_value()
2251 let constness = if cx.tcx.is_const_fn(self.def_id) {
2252 hir::Constness::Const
2254 hir::Constness::NotConst
2257 unsafety: sig.unsafety(),
2264 TyMethodItem(TyMethod {
2265 unsafety: sig.unsafety(),
2272 ty::AssociatedKind::Type => {
2273 let my_name = self.name.clean(cx);
2275 if let ty::TraitContainer(did) = self.container {
2276 // When loading a cross-crate associated type, the bounds for this type
2277 // are actually located on the trait/impl itself, so we need to load
2278 // all of the generics from there and then look for bounds that are
2279 // applied to this associated type in question.
2280 let predicates = cx.tcx.predicates_of(did);
2281 let generics = (cx.tcx.generics_of(did), &predicates).clean(cx);
2282 let mut bounds = generics.where_predicates.iter().filter_map(|pred| {
2283 let (name, self_type, trait_, bounds) = match *pred {
2284 WherePredicate::BoundPredicate {
2285 ty: QPath { ref name, ref self_type, ref trait_ },
2287 } => (name, self_type, trait_, bounds),
2290 if *name != my_name { return None }
2292 ResolvedPath { did, .. } if did == self.container.id() => {}
2296 Generic(ref s) if *s == "Self" => {}
2300 }).flat_map(|i| i.iter().cloned()).collect::<Vec<_>>();
2301 // Our Sized/?Sized bound didn't get handled when creating the generics
2302 // because we didn't actually get our whole set of bounds until just now
2303 // (some of them may have come from the trait). If we do have a sized
2304 // bound, we remove it, and if we don't then we add the `?Sized` bound
2306 match bounds.iter().position(|b| b.is_sized_bound(cx)) {
2307 Some(i) => { bounds.remove(i); }
2308 None => bounds.push(TyParamBound::maybe_sized(cx)),
2311 let ty = if self.defaultness.has_value() {
2312 Some(cx.tcx.type_of(self.def_id))
2317 AssociatedTypeItem(bounds, ty.clean(cx))
2319 TypedefItem(Typedef {
2320 type_: cx.tcx.type_of(self.def_id).clean(cx),
2321 generics: Generics {
2323 where_predicates: Vec::new(),
2330 let visibility = match self.container {
2331 ty::ImplContainer(_) => self.vis.clean(cx),
2332 ty::TraitContainer(_) => None,
2336 name: Some(self.name.clean(cx)),
2338 stability: get_stability(cx, self.def_id),
2339 deprecation: get_deprecation(cx, self.def_id),
2340 def_id: self.def_id,
2341 attrs: inline::load_attrs(cx, self.def_id),
2342 source: cx.tcx.def_span(self.def_id).clean(cx),
2348 /// A trait reference, which may have higher ranked lifetimes.
2349 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2350 pub struct PolyTrait {
2352 pub generic_params: Vec<GenericParam>,
2355 /// A representation of a Type suitable for hyperlinking purposes. Ideally one can get the original
2356 /// type out of the AST/TyCtxt given one of these, if more information is needed. Most importantly
2357 /// it does not preserve mutability or boxes.
2358 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2360 /// structs/enums/traits (most that'd be an hir::TyPath)
2363 typarams: Option<Vec<TyParamBound>>,
2365 /// true if is a `T::Name` path for associated types
2368 /// For parameterized types, so the consumer of the JSON don't go
2369 /// looking for types which don't exist anywhere.
2371 /// Primitives are the fixed-size numeric types (plus int/usize/float), char,
2372 /// arrays, slices, and tuples.
2373 Primitive(PrimitiveType),
2375 BareFunction(Box<BareFunctionDecl>),
2378 Array(Box<Type>, String),
2381 RawPointer(Mutability, Box<Type>),
2383 lifetime: Option<Lifetime>,
2384 mutability: Mutability,
2388 // <Type as Trait>::Name
2391 self_type: Box<Type>,
2398 // impl TraitA+TraitB
2399 ImplTrait(Vec<TyParamBound>),
2402 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Hash, Copy, Debug)]
2403 pub enum PrimitiveType {
2404 Isize, I8, I16, I32, I64, I128,
2405 Usize, U8, U16, U32, U64, U128,
2420 #[derive(Clone, RustcEncodable, RustcDecodable, Copy, Debug)]
2436 pub trait GetDefId {
2437 fn def_id(&self) -> Option<DefId>;
2440 impl<T: GetDefId> GetDefId for Option<T> {
2441 fn def_id(&self) -> Option<DefId> {
2442 self.as_ref().and_then(|d| d.def_id())
2447 pub fn primitive_type(&self) -> Option<PrimitiveType> {
2449 Primitive(p) | BorrowedRef { type_: box Primitive(p), ..} => Some(p),
2450 Slice(..) | BorrowedRef { type_: box Slice(..), .. } => Some(PrimitiveType::Slice),
2451 Array(..) | BorrowedRef { type_: box Array(..), .. } => Some(PrimitiveType::Array),
2452 Tuple(ref tys) => if tys.is_empty() {
2453 Some(PrimitiveType::Unit)
2455 Some(PrimitiveType::Tuple)
2457 RawPointer(..) => Some(PrimitiveType::RawPointer),
2458 BorrowedRef { type_: box Generic(..), .. } => Some(PrimitiveType::Reference),
2459 BareFunction(..) => Some(PrimitiveType::Fn),
2460 Never => Some(PrimitiveType::Never),
2465 pub fn is_generic(&self) -> bool {
2467 ResolvedPath { is_generic, .. } => is_generic,
2472 pub fn is_self_type(&self) -> bool {
2474 Generic(ref name) => name == "Self",
2479 pub fn generics(&self) -> Option<&[Type]> {
2481 ResolvedPath { ref path, .. } => {
2482 path.segments.last().and_then(|seg| {
2483 if let PathParameters::AngleBracketed { ref types, .. } = seg.params {
2495 impl GetDefId for Type {
2496 fn def_id(&self) -> Option<DefId> {
2498 ResolvedPath { did, .. } => Some(did),
2499 Primitive(p) => ::html::render::cache().primitive_locations.get(&p).cloned(),
2500 BorrowedRef { type_: box Generic(..), .. } =>
2501 Primitive(PrimitiveType::Reference).def_id(),
2502 BorrowedRef { ref type_, .. } => type_.def_id(),
2503 Tuple(ref tys) => if tys.is_empty() {
2504 Primitive(PrimitiveType::Unit).def_id()
2506 Primitive(PrimitiveType::Tuple).def_id()
2508 BareFunction(..) => Primitive(PrimitiveType::Fn).def_id(),
2509 Never => Primitive(PrimitiveType::Never).def_id(),
2510 Slice(..) => Primitive(PrimitiveType::Slice).def_id(),
2511 Array(..) => Primitive(PrimitiveType::Array).def_id(),
2512 RawPointer(..) => Primitive(PrimitiveType::RawPointer).def_id(),
2513 QPath { ref self_type, .. } => self_type.def_id(),
2519 impl PrimitiveType {
2520 fn from_str(s: &str) -> Option<PrimitiveType> {
2522 "isize" => Some(PrimitiveType::Isize),
2523 "i8" => Some(PrimitiveType::I8),
2524 "i16" => Some(PrimitiveType::I16),
2525 "i32" => Some(PrimitiveType::I32),
2526 "i64" => Some(PrimitiveType::I64),
2527 "i128" => Some(PrimitiveType::I128),
2528 "usize" => Some(PrimitiveType::Usize),
2529 "u8" => Some(PrimitiveType::U8),
2530 "u16" => Some(PrimitiveType::U16),
2531 "u32" => Some(PrimitiveType::U32),
2532 "u64" => Some(PrimitiveType::U64),
2533 "u128" => Some(PrimitiveType::U128),
2534 "bool" => Some(PrimitiveType::Bool),
2535 "char" => Some(PrimitiveType::Char),
2536 "str" => Some(PrimitiveType::Str),
2537 "f32" => Some(PrimitiveType::F32),
2538 "f64" => Some(PrimitiveType::F64),
2539 "array" => Some(PrimitiveType::Array),
2540 "slice" => Some(PrimitiveType::Slice),
2541 "tuple" => Some(PrimitiveType::Tuple),
2542 "unit" => Some(PrimitiveType::Unit),
2543 "pointer" => Some(PrimitiveType::RawPointer),
2544 "reference" => Some(PrimitiveType::Reference),
2545 "fn" => Some(PrimitiveType::Fn),
2546 "never" => Some(PrimitiveType::Never),
2551 pub fn as_str(&self) -> &'static str {
2552 use self::PrimitiveType::*;
2575 RawPointer => "pointer",
2576 Reference => "reference",
2582 pub fn to_url_str(&self) -> &'static str {
2587 impl From<ast::IntTy> for PrimitiveType {
2588 fn from(int_ty: ast::IntTy) -> PrimitiveType {
2590 ast::IntTy::Isize => PrimitiveType::Isize,
2591 ast::IntTy::I8 => PrimitiveType::I8,
2592 ast::IntTy::I16 => PrimitiveType::I16,
2593 ast::IntTy::I32 => PrimitiveType::I32,
2594 ast::IntTy::I64 => PrimitiveType::I64,
2595 ast::IntTy::I128 => PrimitiveType::I128,
2600 impl From<ast::UintTy> for PrimitiveType {
2601 fn from(uint_ty: ast::UintTy) -> PrimitiveType {
2603 ast::UintTy::Usize => PrimitiveType::Usize,
2604 ast::UintTy::U8 => PrimitiveType::U8,
2605 ast::UintTy::U16 => PrimitiveType::U16,
2606 ast::UintTy::U32 => PrimitiveType::U32,
2607 ast::UintTy::U64 => PrimitiveType::U64,
2608 ast::UintTy::U128 => PrimitiveType::U128,
2613 impl From<ast::FloatTy> for PrimitiveType {
2614 fn from(float_ty: ast::FloatTy) -> PrimitiveType {
2616 ast::FloatTy::F32 => PrimitiveType::F32,
2617 ast::FloatTy::F64 => PrimitiveType::F64,
2622 impl Clean<Type> for hir::Ty {
2623 fn clean(&self, cx: &DocContext) -> Type {
2627 TyPtr(ref m) => RawPointer(m.mutbl.clean(cx), box m.ty.clean(cx)),
2628 TyRptr(ref l, ref m) => {
2629 let lifetime = if l.is_elided() {
2634 BorrowedRef {lifetime: lifetime, mutability: m.mutbl.clean(cx),
2635 type_: box m.ty.clean(cx)}
2637 TySlice(ref ty) => Slice(box ty.clean(cx)),
2638 TyArray(ref ty, n) => {
2639 let def_id = cx.tcx.hir.body_owner_def_id(n);
2640 let param_env = cx.tcx.param_env(def_id);
2641 let substs = Substs::identity_for_item(cx.tcx, def_id);
2642 let cid = GlobalId {
2643 instance: ty::Instance::new(def_id, substs),
2646 let n = cx.tcx.const_eval(param_env.and(cid)).unwrap_or_else(|_| {
2647 cx.tcx.mk_const(ty::Const {
2648 val: ConstVal::Unevaluated(def_id, substs),
2649 ty: cx.tcx.types.usize
2652 let n = print_const(cx, n);
2653 Array(box ty.clean(cx), n)
2655 TyTup(ref tys) => Tuple(tys.clean(cx)),
2656 TyPath(hir::QPath::Resolved(None, ref path)) => {
2657 if let Some(new_ty) = cx.ty_substs.borrow().get(&path.def).cloned() {
2661 if let Def::TyParam(did) = path.def {
2662 if let Some(bounds) = cx.impl_trait_bounds.borrow_mut().remove(&did) {
2663 return ImplTrait(bounds);
2667 let mut alias = None;
2668 if let Def::TyAlias(def_id) = path.def {
2669 // Substitute private type aliases
2670 if let Some(node_id) = cx.tcx.hir.as_local_node_id(def_id) {
2671 if !cx.access_levels.borrow().is_exported(def_id) {
2672 alias = Some(&cx.tcx.hir.expect_item(node_id).node);
2677 if let Some(&hir::ItemTy(ref ty, ref generics)) = alias {
2678 let provided_params = &path.segments.last().unwrap();
2679 let mut ty_substs = FxHashMap();
2680 let mut lt_substs = FxHashMap();
2681 provided_params.with_parameters(|provided_params| {
2682 for (i, ty_param) in generics.ty_params().enumerate() {
2683 let ty_param_def = Def::TyParam(cx.tcx.hir.local_def_id(ty_param.id));
2684 if let Some(ty) = provided_params.types.get(i).cloned() {
2685 ty_substs.insert(ty_param_def, ty.into_inner().clean(cx));
2686 } else if let Some(default) = ty_param.default.clone() {
2687 ty_substs.insert(ty_param_def, default.into_inner().clean(cx));
2691 for (i, lt_param) in generics.lifetimes().enumerate() {
2692 if let Some(lt) = provided_params.lifetimes.get(i).cloned() {
2693 if !lt.is_elided() {
2694 let lt_def_id = cx.tcx.hir.local_def_id(lt_param.lifetime.id);
2695 lt_substs.insert(lt_def_id, lt.clean(cx));
2700 return cx.enter_alias(ty_substs, lt_substs, || ty.clean(cx));
2702 resolve_type(cx, path.clean(cx), self.id)
2704 TyPath(hir::QPath::Resolved(Some(ref qself), ref p)) => {
2705 let mut segments: Vec<_> = p.segments.clone().into();
2707 let trait_path = hir::Path {
2709 def: Def::Trait(cx.tcx.associated_item(p.def.def_id()).container.id()),
2710 segments: segments.into(),
2713 name: p.segments.last().unwrap().name.clean(cx),
2714 self_type: box qself.clean(cx),
2715 trait_: box resolve_type(cx, trait_path.clean(cx), self.id)
2718 TyPath(hir::QPath::TypeRelative(ref qself, ref segment)) => {
2719 let mut def = Def::Err;
2720 let ty = hir_ty_to_ty(cx.tcx, self);
2721 if let ty::TyProjection(proj) = ty.sty {
2722 def = Def::Trait(proj.trait_ref(cx.tcx).def_id);
2724 let trait_path = hir::Path {
2727 segments: vec![].into(),
2730 name: segment.name.clean(cx),
2731 self_type: box qself.clean(cx),
2732 trait_: box resolve_type(cx, trait_path.clean(cx), self.id)
2735 TyTraitObject(ref bounds, ref lifetime) => {
2736 match bounds[0].clean(cx).trait_ {
2737 ResolvedPath { path, typarams: None, did, is_generic } => {
2738 let mut bounds: Vec<_> = bounds[1..].iter().map(|bound| {
2739 TraitBound(bound.clean(cx), hir::TraitBoundModifier::None)
2741 if !lifetime.is_elided() {
2742 bounds.push(RegionBound(lifetime.clean(cx)));
2746 typarams: Some(bounds),
2751 _ => Infer // shouldn't happen
2754 TyBareFn(ref barefn) => BareFunction(box barefn.clean(cx)),
2755 TyImplTraitExistential(ref exist_ty, ref _lts) => ImplTrait(exist_ty.bounds.clean(cx)),
2756 TyInfer | TyErr => Infer,
2757 TyTypeof(..) => panic!("Unimplemented type {:?}", self.node),
2762 impl<'tcx> Clean<Type> for Ty<'tcx> {
2763 fn clean(&self, cx: &DocContext) -> Type {
2765 ty::TyNever => Never,
2766 ty::TyBool => Primitive(PrimitiveType::Bool),
2767 ty::TyChar => Primitive(PrimitiveType::Char),
2768 ty::TyInt(int_ty) => Primitive(int_ty.into()),
2769 ty::TyUint(uint_ty) => Primitive(uint_ty.into()),
2770 ty::TyFloat(float_ty) => Primitive(float_ty.into()),
2771 ty::TyStr => Primitive(PrimitiveType::Str),
2772 ty::TySlice(ty) => Slice(box ty.clean(cx)),
2773 ty::TyArray(ty, n) => {
2774 let mut n = cx.tcx.lift(&n).unwrap();
2775 if let ConstVal::Unevaluated(def_id, substs) = n.val {
2776 let param_env = cx.tcx.param_env(def_id);
2777 let cid = GlobalId {
2778 instance: ty::Instance::new(def_id, substs),
2781 if let Ok(new_n) = cx.tcx.const_eval(param_env.and(cid)) {
2785 let n = print_const(cx, n);
2786 Array(box ty.clean(cx), n)
2788 ty::TyRawPtr(mt) => RawPointer(mt.mutbl.clean(cx), box mt.ty.clean(cx)),
2789 ty::TyRef(r, ty, mutbl) => BorrowedRef {
2790 lifetime: r.clean(cx),
2791 mutability: mutbl.clean(cx),
2792 type_: box ty.clean(cx),
2796 let ty = cx.tcx.lift(self).unwrap();
2797 let sig = ty.fn_sig(cx.tcx);
2798 BareFunction(box BareFunctionDecl {
2799 unsafety: sig.unsafety(),
2800 generic_params: Vec::new(),
2801 decl: (cx.tcx.hir.local_def_id(ast::CRATE_NODE_ID), sig).clean(cx),
2805 ty::TyAdt(def, substs) => {
2807 let kind = match def.adt_kind() {
2808 AdtKind::Struct => TypeKind::Struct,
2809 AdtKind::Union => TypeKind::Union,
2810 AdtKind::Enum => TypeKind::Enum,
2812 inline::record_extern_fqn(cx, did, kind);
2813 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2814 None, false, vec![], substs);
2822 ty::TyForeign(did) => {
2823 inline::record_extern_fqn(cx, did, TypeKind::Foreign);
2824 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2825 None, false, vec![], Substs::empty());
2833 ty::TyDynamic(ref obj, ref reg) => {
2834 if let Some(principal) = obj.principal() {
2835 let did = principal.def_id();
2836 inline::record_extern_fqn(cx, did, TypeKind::Trait);
2838 let mut typarams = vec![];
2839 reg.clean(cx).map(|b| typarams.push(RegionBound(b)));
2840 for did in obj.auto_traits() {
2841 let empty = cx.tcx.intern_substs(&[]);
2842 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2843 Some(did), false, vec![], empty);
2844 inline::record_extern_fqn(cx, did, TypeKind::Trait);
2845 let bound = TraitBound(PolyTrait {
2846 trait_: ResolvedPath {
2852 generic_params: Vec::new(),
2853 }, hir::TraitBoundModifier::None);
2854 typarams.push(bound);
2857 let mut bindings = vec![];
2858 for pb in obj.projection_bounds() {
2859 bindings.push(TypeBinding {
2860 name: cx.tcx.associated_item(pb.item_def_id()).name.clean(cx),
2861 ty: pb.skip_binder().ty.clean(cx)
2865 let path = external_path(cx, &cx.tcx.item_name(did).as_str(), Some(did),
2866 false, bindings, principal.skip_binder().substs);
2869 typarams: Some(typarams),
2877 ty::TyTuple(ref t) => Tuple(t.clean(cx)),
2879 ty::TyProjection(ref data) => data.clean(cx),
2881 ty::TyParam(ref p) => Generic(p.name.to_string()),
2883 ty::TyAnon(def_id, substs) => {
2884 // Grab the "TraitA + TraitB" from `impl TraitA + TraitB`,
2885 // by looking up the projections associated with the def_id.
2886 let predicates_of = cx.tcx.predicates_of(def_id);
2887 let substs = cx.tcx.lift(&substs).unwrap();
2888 let bounds = predicates_of.instantiate(cx.tcx, substs);
2889 let mut regions = vec![];
2890 let mut has_sized = false;
2891 let mut bounds = bounds.predicates.iter().filter_map(|predicate| {
2892 let trait_ref = if let Some(tr) = predicate.to_opt_poly_trait_ref() {
2894 } else if let ty::Predicate::TypeOutlives(pred) = *predicate {
2895 // these should turn up at the end
2896 pred.skip_binder().1.clean(cx).map(|r| regions.push(RegionBound(r)));
2902 if let Some(sized) = cx.tcx.lang_items().sized_trait() {
2903 if trait_ref.def_id() == sized {
2910 let bounds = bounds.predicates.iter().filter_map(|pred|
2911 if let ty::Predicate::Projection(proj) = *pred {
2912 let proj = proj.skip_binder();
2913 if proj.projection_ty.trait_ref(cx.tcx) == *trait_ref.skip_binder() {
2915 name: cx.tcx.associated_item(proj.projection_ty.item_def_id)
2917 ty: proj.ty.clean(cx),
2927 Some((trait_ref.skip_binder(), bounds).clean(cx))
2928 }).collect::<Vec<_>>();
2929 bounds.extend(regions);
2930 if !has_sized && !bounds.is_empty() {
2931 bounds.insert(0, TyParamBound::maybe_sized(cx));
2936 ty::TyClosure(..) | ty::TyGenerator(..) => Tuple(vec![]), // FIXME(pcwalton)
2938 ty::TyGeneratorWitness(..) => panic!("TyGeneratorWitness"),
2939 ty::TyInfer(..) => panic!("TyInfer"),
2940 ty::TyError => panic!("TyError"),
2945 impl Clean<Item> for hir::StructField {
2946 fn clean(&self, cx: &DocContext) -> Item {
2948 name: Some(self.name).clean(cx),
2949 attrs: self.attrs.clean(cx),
2950 source: self.span.clean(cx),
2951 visibility: self.vis.clean(cx),
2952 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2953 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2954 def_id: cx.tcx.hir.local_def_id(self.id),
2955 inner: StructFieldItem(self.ty.clean(cx)),
2960 impl<'tcx> Clean<Item> for ty::FieldDef {
2961 fn clean(&self, cx: &DocContext) -> Item {
2963 name: Some(self.name).clean(cx),
2964 attrs: cx.tcx.get_attrs(self.did).clean(cx),
2965 source: cx.tcx.def_span(self.did).clean(cx),
2966 visibility: self.vis.clean(cx),
2967 stability: get_stability(cx, self.did),
2968 deprecation: get_deprecation(cx, self.did),
2970 inner: StructFieldItem(cx.tcx.type_of(self.did).clean(cx)),
2975 #[derive(Clone, PartialEq, Eq, RustcDecodable, RustcEncodable, Debug)]
2976 pub enum Visibility {
2981 impl Clean<Option<Visibility>> for hir::Visibility {
2982 fn clean(&self, _: &DocContext) -> Option<Visibility> {
2983 Some(if *self == hir::Visibility::Public { Public } else { Inherited })
2987 impl Clean<Option<Visibility>> for ty::Visibility {
2988 fn clean(&self, _: &DocContext) -> Option<Visibility> {
2989 Some(if *self == ty::Visibility::Public { Public } else { Inherited })
2993 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
2995 pub struct_type: doctree::StructType,
2996 pub generics: Generics,
2997 pub fields: Vec<Item>,
2998 pub fields_stripped: bool,
3001 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3003 pub struct_type: doctree::StructType,
3004 pub generics: Generics,
3005 pub fields: Vec<Item>,
3006 pub fields_stripped: bool,
3009 impl Clean<Vec<Item>> for doctree::Struct {
3010 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3011 let name = self.name.clean(cx);
3012 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3016 attrs: self.attrs.clean(cx),
3017 source: self.whence.clean(cx),
3018 def_id: cx.tcx.hir.local_def_id(self.id),
3019 visibility: self.vis.clean(cx),
3020 stability: self.stab.clean(cx),
3021 deprecation: self.depr.clean(cx),
3022 inner: StructItem(Struct {
3023 struct_type: self.struct_type,
3024 generics: self.generics.clean(cx),
3025 fields: self.fields.clean(cx),
3026 fields_stripped: false,
3034 impl Clean<Vec<Item>> for doctree::Union {
3035 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3036 let name = self.name.clean(cx);
3037 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3041 attrs: self.attrs.clean(cx),
3042 source: self.whence.clean(cx),
3043 def_id: cx.tcx.hir.local_def_id(self.id),
3044 visibility: self.vis.clean(cx),
3045 stability: self.stab.clean(cx),
3046 deprecation: self.depr.clean(cx),
3047 inner: UnionItem(Union {
3048 struct_type: self.struct_type,
3049 generics: self.generics.clean(cx),
3050 fields: self.fields.clean(cx),
3051 fields_stripped: false,
3059 /// This is a more limited form of the standard Struct, different in that
3060 /// it lacks the things most items have (name, id, parameterization). Found
3061 /// only as a variant in an enum.
3062 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3063 pub struct VariantStruct {
3064 pub struct_type: doctree::StructType,
3065 pub fields: Vec<Item>,
3066 pub fields_stripped: bool,
3069 impl Clean<VariantStruct> for ::rustc::hir::VariantData {
3070 fn clean(&self, cx: &DocContext) -> VariantStruct {
3072 struct_type: doctree::struct_type_from_def(self),
3073 fields: self.fields().iter().map(|x| x.clean(cx)).collect(),
3074 fields_stripped: false,
3079 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3081 pub variants: Vec<Item>,
3082 pub generics: Generics,
3083 pub variants_stripped: bool,
3086 impl Clean<Vec<Item>> for doctree::Enum {
3087 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3088 let name = self.name.clean(cx);
3089 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3093 attrs: self.attrs.clean(cx),
3094 source: self.whence.clean(cx),
3095 def_id: cx.tcx.hir.local_def_id(self.id),
3096 visibility: self.vis.clean(cx),
3097 stability: self.stab.clean(cx),
3098 deprecation: self.depr.clean(cx),
3099 inner: EnumItem(Enum {
3100 variants: self.variants.clean(cx),
3101 generics: self.generics.clean(cx),
3102 variants_stripped: false,
3110 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3111 pub struct Variant {
3112 pub kind: VariantKind,
3115 impl Clean<Item> for doctree::Variant {
3116 fn clean(&self, cx: &DocContext) -> Item {
3118 name: Some(self.name.clean(cx)),
3119 attrs: self.attrs.clean(cx),
3120 source: self.whence.clean(cx),
3122 stability: self.stab.clean(cx),
3123 deprecation: self.depr.clean(cx),
3124 def_id: cx.tcx.hir.local_def_id(self.def.id()),
3125 inner: VariantItem(Variant {
3126 kind: self.def.clean(cx),
3132 impl<'tcx> Clean<Item> for ty::VariantDef {
3133 fn clean(&self, cx: &DocContext) -> Item {
3134 let kind = match self.ctor_kind {
3135 CtorKind::Const => VariantKind::CLike,
3138 self.fields.iter().map(|f| cx.tcx.type_of(f.did).clean(cx)).collect()
3141 CtorKind::Fictive => {
3142 VariantKind::Struct(VariantStruct {
3143 struct_type: doctree::Plain,
3144 fields_stripped: false,
3145 fields: self.fields.iter().map(|field| {
3147 source: cx.tcx.def_span(field.did).clean(cx),
3148 name: Some(field.name.clean(cx)),
3149 attrs: cx.tcx.get_attrs(field.did).clean(cx),
3150 visibility: field.vis.clean(cx),
3152 stability: get_stability(cx, field.did),
3153 deprecation: get_deprecation(cx, field.did),
3154 inner: StructFieldItem(cx.tcx.type_of(field.did).clean(cx))
3161 name: Some(self.name.clean(cx)),
3162 attrs: inline::load_attrs(cx, self.did),
3163 source: cx.tcx.def_span(self.did).clean(cx),
3164 visibility: Some(Inherited),
3166 inner: VariantItem(Variant { kind: kind }),
3167 stability: get_stability(cx, self.did),
3168 deprecation: get_deprecation(cx, self.did),
3173 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3174 pub enum VariantKind {
3177 Struct(VariantStruct),
3180 impl Clean<VariantKind> for hir::VariantData {
3181 fn clean(&self, cx: &DocContext) -> VariantKind {
3182 if self.is_struct() {
3183 VariantKind::Struct(self.clean(cx))
3184 } else if self.is_unit() {
3187 VariantKind::Tuple(self.fields().iter().map(|x| x.ty.clean(cx)).collect())
3192 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3194 pub filename: FileName,
3202 pub fn empty() -> Span {
3204 filename: FileName::Anon,
3205 loline: 0, locol: 0,
3206 hiline: 0, hicol: 0,
3211 impl Clean<Span> for syntax_pos::Span {
3212 fn clean(&self, cx: &DocContext) -> Span {
3213 if *self == DUMMY_SP {
3214 return Span::empty();
3217 let cm = cx.sess().codemap();
3218 let filename = cm.span_to_filename(*self);
3219 let lo = cm.lookup_char_pos(self.lo());
3220 let hi = cm.lookup_char_pos(self.hi());
3224 locol: lo.col.to_usize(),
3226 hicol: hi.col.to_usize(),
3231 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3235 pub segments: Vec<PathSegment>,
3239 pub fn singleton(name: String) -> Path {
3243 segments: vec![PathSegment {
3245 params: PathParameters::AngleBracketed {
3246 lifetimes: Vec::new(),
3248 bindings: Vec::new(),
3254 pub fn last_name(&self) -> &str {
3255 self.segments.last().unwrap().name.as_str()
3259 impl Clean<Path> for hir::Path {
3260 fn clean(&self, cx: &DocContext) -> Path {
3262 global: self.is_global(),
3264 segments: if self.is_global() { &self.segments[1..] } else { &self.segments }.clean(cx),
3269 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3270 pub enum PathParameters {
3272 lifetimes: Vec<Lifetime>,
3274 bindings: Vec<TypeBinding>,
3278 output: Option<Type>,
3282 impl Clean<PathParameters> for hir::PathParameters {
3283 fn clean(&self, cx: &DocContext) -> PathParameters {
3284 if self.parenthesized {
3285 let output = self.bindings[0].ty.clean(cx);
3286 PathParameters::Parenthesized {
3287 inputs: self.inputs().clean(cx),
3288 output: if output != Type::Tuple(Vec::new()) { Some(output) } else { None }
3291 PathParameters::AngleBracketed {
3292 lifetimes: if self.lifetimes.iter().all(|lt| lt.is_elided()) {
3295 self.lifetimes.clean(cx)
3297 types: self.types.clean(cx),
3298 bindings: self.bindings.clean(cx),
3304 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3305 pub struct PathSegment {
3307 pub params: PathParameters,
3310 impl Clean<PathSegment> for hir::PathSegment {
3311 fn clean(&self, cx: &DocContext) -> PathSegment {
3313 name: self.name.clean(cx),
3314 params: self.with_parameters(|parameters| parameters.clean(cx))
3319 fn strip_type(ty: Type) -> Type {
3321 Type::ResolvedPath { path, typarams, did, is_generic } => {
3322 Type::ResolvedPath { path: strip_path(&path), typarams, did, is_generic }
3324 Type::Tuple(inner_tys) => {
3325 Type::Tuple(inner_tys.iter().map(|t| strip_type(t.clone())).collect())
3327 Type::Slice(inner_ty) => Type::Slice(Box::new(strip_type(*inner_ty))),
3328 Type::Array(inner_ty, s) => Type::Array(Box::new(strip_type(*inner_ty)), s),
3329 Type::Unique(inner_ty) => Type::Unique(Box::new(strip_type(*inner_ty))),
3330 Type::RawPointer(m, inner_ty) => Type::RawPointer(m, Box::new(strip_type(*inner_ty))),
3331 Type::BorrowedRef { lifetime, mutability, type_ } => {
3332 Type::BorrowedRef { lifetime, mutability, type_: Box::new(strip_type(*type_)) }
3334 Type::QPath { name, self_type, trait_ } => {
3337 self_type: Box::new(strip_type(*self_type)), trait_: Box::new(strip_type(*trait_))
3344 fn strip_path(path: &Path) -> Path {
3345 let segments = path.segments.iter().map(|s| {
3347 name: s.name.clone(),
3348 params: PathParameters::AngleBracketed {
3349 lifetimes: Vec::new(),
3351 bindings: Vec::new(),
3357 global: path.global,
3358 def: path.def.clone(),
3363 fn qpath_to_string(p: &hir::QPath) -> String {
3364 let segments = match *p {
3365 hir::QPath::Resolved(_, ref path) => &path.segments,
3366 hir::QPath::TypeRelative(_, ref segment) => return segment.name.to_string(),
3369 let mut s = String::new();
3370 for (i, seg) in segments.iter().enumerate() {
3374 if seg.name != keywords::CrateRoot.name() {
3375 s.push_str(&*seg.name.as_str());
3381 impl Clean<String> for ast::Name {
3382 fn clean(&self, _: &DocContext) -> String {
3387 impl Clean<String> for InternedString {
3388 fn clean(&self, _: &DocContext) -> String {
3393 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3394 pub struct Typedef {
3396 pub generics: Generics,
3399 impl Clean<Item> for doctree::Typedef {
3400 fn clean(&self, cx: &DocContext) -> Item {
3402 name: Some(self.name.clean(cx)),
3403 attrs: self.attrs.clean(cx),
3404 source: self.whence.clean(cx),
3405 def_id: cx.tcx.hir.local_def_id(self.id.clone()),
3406 visibility: self.vis.clean(cx),
3407 stability: self.stab.clean(cx),
3408 deprecation: self.depr.clean(cx),
3409 inner: TypedefItem(Typedef {
3410 type_: self.ty.clean(cx),
3411 generics: self.gen.clean(cx),
3417 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3418 pub struct BareFunctionDecl {
3419 pub unsafety: hir::Unsafety,
3420 pub generic_params: Vec<GenericParam>,
3425 impl Clean<BareFunctionDecl> for hir::BareFnTy {
3426 fn clean(&self, cx: &DocContext) -> BareFunctionDecl {
3427 let (generic_params, decl) = enter_impl_trait(cx, || {
3428 (self.generic_params.clean(cx), (&*self.decl, &self.arg_names[..]).clean(cx))
3431 unsafety: self.unsafety,
3439 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3442 pub mutability: Mutability,
3443 /// It's useful to have the value of a static documented, but I have no
3444 /// desire to represent expressions (that'd basically be all of the AST,
3445 /// which is huge!). So, have a string.
3449 impl Clean<Item> for doctree::Static {
3450 fn clean(&self, cx: &DocContext) -> Item {
3451 debug!("cleaning static {}: {:?}", self.name.clean(cx), self);
3453 name: Some(self.name.clean(cx)),
3454 attrs: self.attrs.clean(cx),
3455 source: self.whence.clean(cx),
3456 def_id: cx.tcx.hir.local_def_id(self.id),
3457 visibility: self.vis.clean(cx),
3458 stability: self.stab.clean(cx),
3459 deprecation: self.depr.clean(cx),
3460 inner: StaticItem(Static {
3461 type_: self.type_.clean(cx),
3462 mutability: self.mutability.clean(cx),
3463 expr: print_const_expr(cx, self.expr),
3469 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3470 pub struct Constant {
3475 impl Clean<Item> for doctree::Constant {
3476 fn clean(&self, cx: &DocContext) -> Item {
3478 name: Some(self.name.clean(cx)),
3479 attrs: self.attrs.clean(cx),
3480 source: self.whence.clean(cx),
3481 def_id: cx.tcx.hir.local_def_id(self.id),
3482 visibility: self.vis.clean(cx),
3483 stability: self.stab.clean(cx),
3484 deprecation: self.depr.clean(cx),
3485 inner: ConstantItem(Constant {
3486 type_: self.type_.clean(cx),
3487 expr: print_const_expr(cx, self.expr),
3493 #[derive(Debug, Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Copy, Hash)]
3494 pub enum Mutability {
3499 impl Clean<Mutability> for hir::Mutability {
3500 fn clean(&self, _: &DocContext) -> Mutability {
3502 &hir::MutMutable => Mutable,
3503 &hir::MutImmutable => Immutable,
3508 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Copy, Debug, Hash)]
3509 pub enum ImplPolarity {
3514 impl Clean<ImplPolarity> for hir::ImplPolarity {
3515 fn clean(&self, _: &DocContext) -> ImplPolarity {
3517 &hir::ImplPolarity::Positive => ImplPolarity::Positive,
3518 &hir::ImplPolarity::Negative => ImplPolarity::Negative,
3523 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3525 pub unsafety: hir::Unsafety,
3526 pub generics: Generics,
3527 pub provided_trait_methods: FxHashSet<String>,
3528 pub trait_: Option<Type>,
3530 pub items: Vec<Item>,
3531 pub polarity: Option<ImplPolarity>,
3532 pub synthetic: bool,
3535 pub fn get_auto_traits_with_node_id(cx: &DocContext, id: ast::NodeId, name: String) -> Vec<Item> {
3536 let finder = AutoTraitFinder::new(cx);
3537 finder.get_with_node_id(id, name)
3540 pub fn get_auto_traits_with_def_id(cx: &DocContext, id: DefId) -> Vec<Item> {
3541 let finder = AutoTraitFinder::new(cx);
3543 finder.get_with_def_id(id)
3546 impl Clean<Vec<Item>> for doctree::Impl {
3547 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3548 let mut ret = Vec::new();
3549 let trait_ = self.trait_.clean(cx);
3550 let items = self.items.clean(cx);
3552 // If this impl block is an implementation of the Deref trait, then we
3553 // need to try inlining the target's inherent impl blocks as well.
3554 if trait_.def_id() == cx.tcx.lang_items().deref_trait() {
3555 build_deref_target_impls(cx, &items, &mut ret);
3558 let provided = trait_.def_id().map(|did| {
3559 cx.tcx.provided_trait_methods(did)
3561 .map(|meth| meth.name.to_string())
3563 }).unwrap_or(FxHashSet());
3567 attrs: self.attrs.clean(cx),
3568 source: self.whence.clean(cx),
3569 def_id: cx.tcx.hir.local_def_id(self.id),
3570 visibility: self.vis.clean(cx),
3571 stability: self.stab.clean(cx),
3572 deprecation: self.depr.clean(cx),
3573 inner: ImplItem(Impl {
3574 unsafety: self.unsafety,
3575 generics: self.generics.clean(cx),
3576 provided_trait_methods: provided,
3578 for_: self.for_.clean(cx),
3580 polarity: Some(self.polarity.clean(cx)),
3588 fn build_deref_target_impls(cx: &DocContext,
3590 ret: &mut Vec<Item>) {
3591 use self::PrimitiveType::*;
3595 let target = match item.inner {
3596 TypedefItem(ref t, true) => &t.type_,
3599 let primitive = match *target {
3600 ResolvedPath { did, .. } if did.is_local() => continue,
3601 ResolvedPath { did, .. } => {
3602 // We set the last parameter to false to avoid looking for auto-impls for traits
3603 // and therefore avoid an ICE.
3604 // The reason behind this is that auto-traits don't propagate through Deref so
3605 // we're not supposed to synthesise impls for them.
3606 ret.extend(inline::build_impls(cx, did, false));
3609 _ => match target.primitive_type() {
3614 let did = match primitive {
3615 Isize => tcx.lang_items().isize_impl(),
3616 I8 => tcx.lang_items().i8_impl(),
3617 I16 => tcx.lang_items().i16_impl(),
3618 I32 => tcx.lang_items().i32_impl(),
3619 I64 => tcx.lang_items().i64_impl(),
3620 I128 => tcx.lang_items().i128_impl(),
3621 Usize => tcx.lang_items().usize_impl(),
3622 U8 => tcx.lang_items().u8_impl(),
3623 U16 => tcx.lang_items().u16_impl(),
3624 U32 => tcx.lang_items().u32_impl(),
3625 U64 => tcx.lang_items().u64_impl(),
3626 U128 => tcx.lang_items().u128_impl(),
3627 F32 => tcx.lang_items().f32_impl(),
3628 F64 => tcx.lang_items().f64_impl(),
3629 Char => tcx.lang_items().char_impl(),
3631 Str => tcx.lang_items().str_impl(),
3632 Slice => tcx.lang_items().slice_impl(),
3633 Array => tcx.lang_items().slice_impl(),
3636 RawPointer => tcx.lang_items().const_ptr_impl(),
3641 if let Some(did) = did {
3642 if !did.is_local() {
3643 inline::build_impl(cx, did, ret);
3649 impl Clean<Item> for doctree::ExternCrate {
3650 fn clean(&self, cx: &DocContext) -> Item {
3653 attrs: self.attrs.clean(cx),
3654 source: self.whence.clean(cx),
3655 def_id: DefId { krate: self.cnum, index: CRATE_DEF_INDEX },
3656 visibility: self.vis.clean(cx),
3659 inner: ExternCrateItem(self.name.clean(cx), self.path.clone())
3664 impl Clean<Vec<Item>> for doctree::Import {
3665 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3666 // We consider inlining the documentation of `pub use` statements, but we
3667 // forcefully don't inline if this is not public or if the
3668 // #[doc(no_inline)] attribute is present.
3669 // Don't inline doc(hidden) imports so they can be stripped at a later stage.
3670 let denied = self.vis != hir::Public || self.attrs.iter().any(|a| {
3671 a.name() == "doc" && match a.meta_item_list() {
3672 Some(l) => attr::list_contains_name(&l, "no_inline") ||
3673 attr::list_contains_name(&l, "hidden"),
3677 let path = self.path.clean(cx);
3678 let inner = if self.glob {
3679 Import::Glob(resolve_use_source(cx, path))
3681 let name = self.name;
3683 let mut visited = FxHashSet();
3684 if let Some(items) = inline::try_inline(cx, path.def, name, &mut visited) {
3688 Import::Simple(name.clean(cx), resolve_use_source(cx, path))
3692 attrs: self.attrs.clean(cx),
3693 source: self.whence.clean(cx),
3694 def_id: cx.tcx.hir.local_def_id(ast::CRATE_NODE_ID),
3695 visibility: self.vis.clean(cx),
3698 inner: ImportItem(inner)
3703 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3705 // use source as str;
3706 Simple(String, ImportSource),
3711 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3712 pub struct ImportSource {
3714 pub did: Option<DefId>,
3717 impl Clean<Vec<Item>> for hir::ForeignMod {
3718 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3719 let mut items = self.items.clean(cx);
3720 for item in &mut items {
3721 if let ForeignFunctionItem(ref mut f) = item.inner {
3729 impl Clean<Item> for hir::ForeignItem {
3730 fn clean(&self, cx: &DocContext) -> Item {
3731 let inner = match self.node {
3732 hir::ForeignItemFn(ref decl, ref names, ref generics) => {
3733 let (generics, decl) = enter_impl_trait(cx, || {
3734 (generics.clean(cx), (&**decl, &names[..]).clean(cx))
3736 ForeignFunctionItem(Function {
3739 unsafety: hir::Unsafety::Unsafe,
3741 constness: hir::Constness::NotConst,
3744 hir::ForeignItemStatic(ref ty, mutbl) => {
3745 ForeignStaticItem(Static {
3746 type_: ty.clean(cx),
3747 mutability: if mutbl {Mutable} else {Immutable},
3748 expr: "".to_string(),
3751 hir::ForeignItemType => {
3756 name: Some(self.name.clean(cx)),
3757 attrs: self.attrs.clean(cx),
3758 source: self.span.clean(cx),
3759 def_id: cx.tcx.hir.local_def_id(self.id),
3760 visibility: self.vis.clean(cx),
3761 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
3762 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
3771 fn to_src(&self, cx: &DocContext) -> String;
3774 impl ToSource for syntax_pos::Span {
3775 fn to_src(&self, cx: &DocContext) -> String {
3776 debug!("converting span {:?} to snippet", self.clean(cx));
3777 let sn = match cx.sess().codemap().span_to_snippet(*self) {
3778 Ok(x) => x.to_string(),
3779 Err(_) => "".to_string()
3781 debug!("got snippet {}", sn);
3786 fn name_from_pat(p: &hir::Pat) -> String {
3788 debug!("Trying to get a name from pattern: {:?}", p);
3791 PatKind::Wild => "_".to_string(),
3792 PatKind::Binding(_, _, ref p, _) => p.node.to_string(),
3793 PatKind::TupleStruct(ref p, ..) | PatKind::Path(ref p) => qpath_to_string(p),
3794 PatKind::Struct(ref name, ref fields, etc) => {
3795 format!("{} {{ {}{} }}", qpath_to_string(name),
3796 fields.iter().map(|&Spanned { node: ref fp, .. }|
3797 format!("{}: {}", fp.name, name_from_pat(&*fp.pat)))
3798 .collect::<Vec<String>>().join(", "),
3799 if etc { ", ..." } else { "" }
3802 PatKind::Tuple(ref elts, _) => format!("({})", elts.iter().map(|p| name_from_pat(&**p))
3803 .collect::<Vec<String>>().join(", ")),
3804 PatKind::Box(ref p) => name_from_pat(&**p),
3805 PatKind::Ref(ref p, _) => name_from_pat(&**p),
3806 PatKind::Lit(..) => {
3807 warn!("tried to get argument name from PatKind::Lit, \
3808 which is silly in function arguments");
3811 PatKind::Range(..) => panic!("tried to get argument name from PatKind::Range, \
3812 which is not allowed in function arguments"),
3813 PatKind::Slice(ref begin, ref mid, ref end) => {
3814 let begin = begin.iter().map(|p| name_from_pat(&**p));
3815 let mid = mid.as_ref().map(|p| format!("..{}", name_from_pat(&**p))).into_iter();
3816 let end = end.iter().map(|p| name_from_pat(&**p));
3817 format!("[{}]", begin.chain(mid).chain(end).collect::<Vec<_>>().join(", "))
3822 fn print_const(cx: &DocContext, n: &ty::Const) -> String {
3824 ConstVal::Unevaluated(def_id, _) => {
3825 if let Some(node_id) = cx.tcx.hir.as_local_node_id(def_id) {
3826 print_const_expr(cx, cx.tcx.hir.body_owned_by(node_id))
3828 inline::print_inlined_const(cx, def_id)
3831 ConstVal::Value(val) => {
3832 let mut s = String::new();
3833 ::rustc::mir::print_miri_value(val, n.ty, &mut s).unwrap();
3834 // array lengths are obviously usize
3835 if s.ends_with("usize") {
3836 let n = s.len() - "usize".len();
3844 fn print_const_expr(cx: &DocContext, body: hir::BodyId) -> String {
3845 cx.tcx.hir.node_to_pretty_string(body.node_id)
3848 /// Given a type Path, resolve it to a Type using the TyCtxt
3849 fn resolve_type(cx: &DocContext,
3851 id: ast::NodeId) -> Type {
3852 if id == ast::DUMMY_NODE_ID {
3853 debug!("resolve_type({:?})", path);
3855 debug!("resolve_type({:?},{:?})", path, id);
3858 let is_generic = match path.def {
3859 Def::PrimTy(p) => match p {
3860 hir::TyStr => return Primitive(PrimitiveType::Str),
3861 hir::TyBool => return Primitive(PrimitiveType::Bool),
3862 hir::TyChar => return Primitive(PrimitiveType::Char),
3863 hir::TyInt(int_ty) => return Primitive(int_ty.into()),
3864 hir::TyUint(uint_ty) => return Primitive(uint_ty.into()),
3865 hir::TyFloat(float_ty) => return Primitive(float_ty.into()),
3867 Def::SelfTy(..) if path.segments.len() == 1 => {
3868 return Generic(keywords::SelfType.name().to_string());
3870 Def::TyParam(..) if path.segments.len() == 1 => {
3871 return Generic(format!("{:#}", path));
3873 Def::SelfTy(..) | Def::TyParam(..) | Def::AssociatedTy(..) => true,
3876 let did = register_def(&*cx, path.def);
3877 ResolvedPath { path: path, typarams: None, did: did, is_generic: is_generic }
3880 fn register_def(cx: &DocContext, def: Def) -> DefId {
3881 debug!("register_def({:?})", def);
3883 let (did, kind) = match def {
3884 Def::Fn(i) => (i, TypeKind::Function),
3885 Def::TyAlias(i) => (i, TypeKind::Typedef),
3886 Def::Enum(i) => (i, TypeKind::Enum),
3887 Def::Trait(i) => (i, TypeKind::Trait),
3888 Def::Struct(i) => (i, TypeKind::Struct),
3889 Def::Union(i) => (i, TypeKind::Union),
3890 Def::Mod(i) => (i, TypeKind::Module),
3891 Def::TyForeign(i) => (i, TypeKind::Foreign),
3892 Def::Const(i) => (i, TypeKind::Const),
3893 Def::Static(i, _) => (i, TypeKind::Static),
3894 Def::Variant(i) => (cx.tcx.parent_def_id(i).unwrap(), TypeKind::Enum),
3895 Def::Macro(i, _) => (i, TypeKind::Macro),
3896 Def::SelfTy(Some(def_id), _) => (def_id, TypeKind::Trait),
3897 Def::SelfTy(_, Some(impl_def_id)) => {
3900 _ => return def.def_id()
3902 if did.is_local() { return did }
3903 inline::record_extern_fqn(cx, did, kind);
3904 if let TypeKind::Trait = kind {
3905 inline::record_extern_trait(cx, did);
3910 fn resolve_use_source(cx: &DocContext, path: Path) -> ImportSource {
3912 did: if path.def == Def::Err {
3915 Some(register_def(cx, path.def))
3921 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3924 pub imported_from: Option<String>,
3927 impl Clean<Item> for doctree::Macro {
3928 fn clean(&self, cx: &DocContext) -> Item {
3929 let name = self.name.clean(cx);
3931 name: Some(name.clone()),
3932 attrs: self.attrs.clean(cx),
3933 source: self.whence.clean(cx),
3934 visibility: Some(Public),
3935 stability: self.stab.clean(cx),
3936 deprecation: self.depr.clean(cx),
3937 def_id: self.def_id,
3938 inner: MacroItem(Macro {
3939 source: format!("macro_rules! {} {{\n{}}}",
3941 self.matchers.iter().map(|span| {
3942 format!(" {} => {{ ... }};\n", span.to_src(cx))
3943 }).collect::<String>()),
3944 imported_from: self.imported_from.clean(cx),
3950 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3951 pub struct Stability {
3952 pub level: stability::StabilityLevel,
3953 pub feature: String,
3955 pub deprecated_since: String,
3956 pub deprecated_reason: String,
3957 pub unstable_reason: String,
3958 pub issue: Option<u32>
3961 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3962 pub struct Deprecation {
3967 impl Clean<Stability> for attr::Stability {
3968 fn clean(&self, _: &DocContext) -> Stability {
3970 level: stability::StabilityLevel::from_attr_level(&self.level),
3971 feature: self.feature.to_string(),
3972 since: match self.level {
3973 attr::Stable {ref since} => since.to_string(),
3974 _ => "".to_string(),
3976 deprecated_since: match self.rustc_depr {
3977 Some(attr::RustcDeprecation {ref since, ..}) => since.to_string(),
3980 deprecated_reason: match self.rustc_depr {
3981 Some(ref depr) => depr.reason.to_string(),
3982 _ => "".to_string(),
3984 unstable_reason: match self.level {
3985 attr::Unstable { reason: Some(ref reason), .. } => reason.to_string(),
3986 _ => "".to_string(),
3988 issue: match self.level {
3989 attr::Unstable {issue, ..} => Some(issue),
3996 impl<'a> Clean<Stability> for &'a attr::Stability {
3997 fn clean(&self, dc: &DocContext) -> Stability {
4002 impl Clean<Deprecation> for attr::Deprecation {
4003 fn clean(&self, _: &DocContext) -> Deprecation {
4005 since: self.since.as_ref().map_or("".to_string(), |s| s.to_string()),
4006 note: self.note.as_ref().map_or("".to_string(), |s| s.to_string()),
4011 /// An equality constraint on an associated type, e.g. `A=Bar` in `Foo<A=Bar>`
4012 #[derive(Clone, PartialEq, Eq, RustcDecodable, RustcEncodable, Debug, Hash)]
4013 pub struct TypeBinding {
4018 impl Clean<TypeBinding> for hir::TypeBinding {
4019 fn clean(&self, cx: &DocContext) -> TypeBinding {
4021 name: self.name.clean(cx),
4022 ty: self.ty.clean(cx)
4027 pub fn def_id_to_path(cx: &DocContext, did: DefId, name: Option<String>) -> Vec<String> {
4028 let crate_name = name.unwrap_or_else(|| cx.tcx.crate_name(did.krate).to_string());
4029 let relative = cx.tcx.def_path(did).data.into_iter().filter_map(|elem| {
4030 // extern blocks have an empty name
4031 let s = elem.data.to_string();
4038 once(crate_name).chain(relative).collect()
4041 pub fn enter_impl_trait<F, R>(cx: &DocContext, f: F) -> R
4045 let old_bounds = mem::replace(&mut *cx.impl_trait_bounds.borrow_mut(), Default::default());
4047 assert!(cx.impl_trait_bounds.borrow().is_empty());
4048 *cx.impl_trait_bounds.borrow_mut() = old_bounds;
4052 // Start of code copied from rust-clippy
4054 pub fn get_trait_def_id(tcx: &TyCtxt, path: &[&str], use_local: bool) -> Option<DefId> {
4056 path_to_def_local(tcx, path)
4058 path_to_def(tcx, path)
4062 pub fn path_to_def_local(tcx: &TyCtxt, path: &[&str]) -> Option<DefId> {
4063 let krate = tcx.hir.krate();
4064 let mut items = krate.module.item_ids.clone();
4065 let mut path_it = path.iter().peekable();
4068 let segment = match path_it.next() {
4069 Some(segment) => segment,
4070 None => return None,
4073 for item_id in mem::replace(&mut items, HirVec::new()).iter() {
4074 let item = tcx.hir.expect_item(item_id.id);
4075 if item.name == *segment {
4076 if path_it.peek().is_none() {
4077 return Some(tcx.hir.local_def_id(item_id.id))
4080 items = match &item.node {
4081 &hir::ItemMod(ref m) => m.item_ids.clone(),
4082 _ => panic!("Unexpected item {:?} in path {:?} path")
4090 pub fn path_to_def(tcx: &TyCtxt, path: &[&str]) -> Option<DefId> {
4091 let crates = tcx.crates();
4095 .find(|&&krate| tcx.crate_name(krate) == path[0]);
4097 if let Some(krate) = krate {
4100 index: CRATE_DEF_INDEX,
4102 let mut items = tcx.item_children(krate);
4103 let mut path_it = path.iter().skip(1).peekable();
4106 let segment = match path_it.next() {
4107 Some(segment) => segment,
4108 None => return None,
4111 for item in mem::replace(&mut items, Lrc::new(vec![])).iter() {
4112 if item.ident.name == *segment {
4113 if path_it.peek().is_none() {
4114 return match item.def {
4115 def::Def::Trait(did) => Some(did),
4120 items = tcx.item_children(item.def.def_id());
4130 fn get_path_for_type(tcx: TyCtxt, def_id: DefId, def_ctor: fn(DefId) -> Def) -> hir::Path {
4131 struct AbsolutePathBuffer {
4135 impl ty::item_path::ItemPathBuffer for AbsolutePathBuffer {
4136 fn root_mode(&self) -> &ty::item_path::RootMode {
4137 const ABSOLUTE: &'static ty::item_path::RootMode = &ty::item_path::RootMode::Absolute;
4141 fn push(&mut self, text: &str) {
4142 self.names.push(text.to_owned());
4146 let mut apb = AbsolutePathBuffer { names: vec![] };
4148 tcx.push_item_path(&mut apb, def_id);
4152 def: def_ctor(def_id),
4153 segments: hir::HirVec::from_vec(apb.names.iter().map(|s| hir::PathSegment {
4154 name: ast::Name::intern(&s),
4161 // End of code copied from rust-clippy
4164 #[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]
4165 enum RegionTarget<'tcx> {
4166 Region(Region<'tcx>),
4167 RegionVid(RegionVid)
4170 #[derive(Default, Debug, Clone)]
4171 struct RegionDeps<'tcx> {
4172 larger: FxHashSet<RegionTarget<'tcx>>,
4173 smaller: FxHashSet<RegionTarget<'tcx>>
4176 #[derive(Eq, PartialEq, Hash, Debug)]
4178 RegionBound(Lifetime),
4179 TraitBound(Vec<PathSegment>, Vec<SimpleBound>, Vec<GenericParam>, hir::TraitBoundModifier)
4182 enum AutoTraitResult {
4184 PositiveImpl(Generics),
4188 impl AutoTraitResult {
4189 fn is_auto(&self) -> bool {
4191 AutoTraitResult::PositiveImpl(_) | AutoTraitResult::NegativeImpl => true,
4197 impl From<TyParamBound> for SimpleBound {
4198 fn from(bound: TyParamBound) -> Self {
4199 match bound.clone() {
4200 TyParamBound::RegionBound(l) => SimpleBound::RegionBound(l),
4201 TyParamBound::TraitBound(t, mod_) => match t.trait_ {
4202 Type::ResolvedPath { path, typarams, .. } => {
4203 SimpleBound::TraitBound(path.segments,
4205 .map_or_else(|| Vec::new(), |v| v.iter()
4206 .map(|p| SimpleBound::from(p.clone()))
4211 _ => panic!("Unexpected bound {:?}", bound),