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;
44 use rustc::ty::subst::Substs;
45 use rustc::ty::{self, TyCtxt, Region, RegionVid, Ty, AdtKind};
46 use rustc::middle::stability;
47 use rustc::util::nodemap::{FxHashMap, FxHashSet};
48 use rustc_typeck::hir_ty_to_ty;
49 use rustc::infer::{InferCtxt, RegionObligation};
50 use rustc::infer::region_constraints::{RegionConstraintData, Constraint};
52 use std::collections::hash_map::Entry;
53 use std::collections::VecDeque;
56 use std::default::Default;
57 use std::{mem, slice, vec};
58 use std::iter::{FromIterator, once};
59 use rustc_data_structures::sync::Lrc;
61 use std::cell::RefCell;
65 use core::{self, DocContext};
68 use html::render::{cache, ExternalLocation};
69 use html::item_type::ItemType;
70 use html::markdown::markdown_links;
78 use self::auto_trait::AutoTraitFinder;
80 thread_local!(static MAX_DEF_ID: RefCell<FxHashMap<CrateNum, DefId>> = RefCell::new(FxHashMap()));
82 const FN_OUTPUT_NAME: &'static str = "Output";
84 // extract the stability index for a node from tcx, if possible
85 fn get_stability(cx: &DocContext, def_id: DefId) -> Option<Stability> {
86 cx.tcx.lookup_stability(def_id).clean(cx)
89 fn get_deprecation(cx: &DocContext, def_id: DefId) -> Option<Deprecation> {
90 cx.tcx.lookup_deprecation(def_id).clean(cx)
94 fn clean(&self, cx: &DocContext) -> T;
97 impl<T: Clean<U>, U> Clean<Vec<U>> for [T] {
98 fn clean(&self, cx: &DocContext) -> Vec<U> {
99 self.iter().map(|x| x.clean(cx)).collect()
103 impl<T: Clean<U>, U> Clean<U> for P<T> {
104 fn clean(&self, cx: &DocContext) -> U {
109 impl<T: Clean<U>, U> Clean<U> for Rc<T> {
110 fn clean(&self, cx: &DocContext) -> U {
115 impl<T: Clean<U>, U> Clean<Option<U>> for Option<T> {
116 fn clean(&self, cx: &DocContext) -> Option<U> {
117 self.as_ref().map(|v| v.clean(cx))
121 impl<T, U> Clean<U> for ty::Binder<T> where T: Clean<U> {
122 fn clean(&self, cx: &DocContext) -> U {
123 self.skip_binder().clean(cx)
127 impl<T: Clean<U>, U> Clean<Vec<U>> for P<[T]> {
128 fn clean(&self, cx: &DocContext) -> Vec<U> {
129 self.iter().map(|x| x.clean(cx)).collect()
133 #[derive(Clone, Debug)]
136 pub version: Option<String>,
138 pub module: Option<Item>,
139 pub externs: Vec<(CrateNum, ExternalCrate)>,
140 pub primitives: Vec<(DefId, PrimitiveType, Attributes)>,
141 pub access_levels: Arc<AccessLevels<DefId>>,
142 // These are later on moved into `CACHEKEY`, leaving the map empty.
143 // Only here so that they can be filtered through the rustdoc passes.
144 pub external_traits: FxHashMap<DefId, Trait>,
145 pub masked_crates: FxHashSet<CrateNum>,
148 impl<'a, 'tcx, 'rcx> Clean<Crate> for visit_ast::RustdocVisitor<'a, 'tcx, 'rcx> {
149 fn clean(&self, cx: &DocContext) -> Crate {
150 use ::visit_lib::LibEmbargoVisitor;
153 let mut r = cx.renderinfo.borrow_mut();
154 r.deref_trait_did = cx.tcx.lang_items().deref_trait();
155 r.deref_mut_trait_did = cx.tcx.lang_items().deref_mut_trait();
156 r.owned_box_did = cx.tcx.lang_items().owned_box();
159 let mut externs = Vec::new();
160 for &cnum in cx.tcx.crates().iter() {
161 externs.push((cnum, cnum.clean(cx)));
162 // Analyze doc-reachability for extern items
163 LibEmbargoVisitor::new(cx).visit_lib(cnum);
165 externs.sort_by(|&(a, _), &(b, _)| a.cmp(&b));
167 // Clean the crate, translating the entire libsyntax AST to one that is
168 // understood by rustdoc.
169 let mut module = self.module.clean(cx);
170 let mut masked_crates = FxHashSet();
173 ModuleItem(ref module) => {
174 for it in &module.items {
175 if it.is_extern_crate() && it.attrs.has_doc_flag("masked") {
176 masked_crates.insert(it.def_id.krate);
183 let ExternalCrate { name, src, primitives, .. } = LOCAL_CRATE.clean(cx);
185 let m = match module.inner {
186 ModuleItem(ref mut m) => m,
189 m.items.extend(primitives.iter().map(|&(def_id, prim, ref attrs)| {
191 source: Span::empty(),
192 name: Some(prim.to_url_str().to_string()),
193 attrs: attrs.clone(),
194 visibility: Some(Public),
195 stability: get_stability(cx, def_id),
196 deprecation: get_deprecation(cx, def_id),
198 inner: PrimitiveItem(prim),
203 let mut access_levels = cx.access_levels.borrow_mut();
204 let mut external_traits = cx.external_traits.borrow_mut();
210 module: Some(module),
213 access_levels: Arc::new(mem::replace(&mut access_levels, Default::default())),
214 external_traits: mem::replace(&mut external_traits, Default::default()),
220 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
221 pub struct ExternalCrate {
224 pub attrs: Attributes,
225 pub primitives: Vec<(DefId, PrimitiveType, Attributes)>,
228 impl Clean<ExternalCrate> for CrateNum {
229 fn clean(&self, cx: &DocContext) -> ExternalCrate {
230 let root = DefId { krate: *self, index: CRATE_DEF_INDEX };
231 let krate_span = cx.tcx.def_span(root);
232 let krate_src = cx.sess().codemap().span_to_filename(krate_span);
234 // Collect all inner modules which are tagged as implementations of
237 // Note that this loop only searches the top-level items of the crate,
238 // and this is intentional. If we were to search the entire crate for an
239 // item tagged with `#[doc(primitive)]` then we would also have to
240 // search the entirety of external modules for items tagged
241 // `#[doc(primitive)]`, which is a pretty inefficient process (decoding
242 // all that metadata unconditionally).
244 // In order to keep the metadata load under control, the
245 // `#[doc(primitive)]` feature is explicitly designed to only allow the
246 // primitive tags to show up as the top level items in a crate.
248 // Also note that this does not attempt to deal with modules tagged
249 // duplicately for the same primitive. This is handled later on when
250 // rendering by delegating everything to a hash map.
251 let as_primitive = |def: Def| {
252 if let Def::Mod(def_id) = def {
253 let attrs = cx.tcx.get_attrs(def_id).clean(cx);
255 for attr in attrs.lists("doc") {
256 if let Some(v) = attr.value_str() {
257 if attr.check_name("primitive") {
258 prim = PrimitiveType::from_str(&v.as_str());
262 // FIXME: should warn on unknown primitives?
266 return prim.map(|p| (def_id, p, attrs));
270 let primitives = if root.is_local() {
271 cx.tcx.hir.krate().module.item_ids.iter().filter_map(|&id| {
272 let item = cx.tcx.hir.expect_item(id.id);
275 as_primitive(Def::Mod(cx.tcx.hir.local_def_id(id.id)))
277 hir::ItemUse(ref path, hir::UseKind::Single)
278 if item.vis == hir::Visibility::Public => {
279 as_primitive(path.def).map(|(_, prim, attrs)| {
280 // Pretend the primitive is local.
281 (cx.tcx.hir.local_def_id(id.id), prim, attrs)
288 cx.tcx.item_children(root).iter().map(|item| item.def)
289 .filter_map(as_primitive).collect()
293 name: cx.tcx.crate_name(*self).to_string(),
295 attrs: cx.tcx.get_attrs(root).clean(cx),
301 /// Anything with a source location and set of attributes and, optionally, a
302 /// name. That is, anything that can be documented. This doesn't correspond
303 /// directly to the AST's concept of an item; it's a strict superset.
304 #[derive(Clone, RustcEncodable, RustcDecodable)]
308 /// Not everything has a name. E.g., impls
309 pub name: Option<String>,
310 pub attrs: Attributes,
312 pub visibility: Option<Visibility>,
314 pub stability: Option<Stability>,
315 pub deprecation: Option<Deprecation>,
318 impl fmt::Debug for Item {
319 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
321 let fake = MAX_DEF_ID.with(|m| m.borrow().get(&self.def_id.krate)
322 .map(|id| self.def_id >= *id).unwrap_or(false));
323 let def_id: &fmt::Debug = if fake { &"**FAKE**" } else { &self.def_id };
325 fmt.debug_struct("Item")
326 .field("source", &self.source)
327 .field("name", &self.name)
328 .field("attrs", &self.attrs)
329 .field("inner", &self.inner)
330 .field("visibility", &self.visibility)
331 .field("def_id", def_id)
332 .field("stability", &self.stability)
333 .field("deprecation", &self.deprecation)
339 /// Finds the `doc` attribute as a NameValue and returns the corresponding
341 pub fn doc_value<'a>(&'a self) -> Option<&'a str> {
342 self.attrs.doc_value()
344 /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined
346 pub fn collapsed_doc_value(&self) -> Option<String> {
347 self.attrs.collapsed_doc_value()
350 pub fn links(&self) -> Vec<(String, String)> {
351 self.attrs.links(&self.def_id.krate)
354 pub fn is_crate(&self) -> bool {
356 StrippedItem(box ModuleItem(Module { is_crate: true, ..})) |
357 ModuleItem(Module { is_crate: true, ..}) => true,
361 pub fn is_mod(&self) -> bool {
362 self.type_() == ItemType::Module
364 pub fn is_trait(&self) -> bool {
365 self.type_() == ItemType::Trait
367 pub fn is_struct(&self) -> bool {
368 self.type_() == ItemType::Struct
370 pub fn is_enum(&self) -> bool {
371 self.type_() == ItemType::Enum
373 pub fn is_fn(&self) -> bool {
374 self.type_() == ItemType::Function
376 pub fn is_associated_type(&self) -> bool {
377 self.type_() == ItemType::AssociatedType
379 pub fn is_associated_const(&self) -> bool {
380 self.type_() == ItemType::AssociatedConst
382 pub fn is_method(&self) -> bool {
383 self.type_() == ItemType::Method
385 pub fn is_ty_method(&self) -> bool {
386 self.type_() == ItemType::TyMethod
388 pub fn is_typedef(&self) -> bool {
389 self.type_() == ItemType::Typedef
391 pub fn is_primitive(&self) -> bool {
392 self.type_() == ItemType::Primitive
394 pub fn is_union(&self) -> bool {
395 self.type_() == ItemType::Union
397 pub fn is_import(&self) -> bool {
398 self.type_() == ItemType::Import
400 pub fn is_extern_crate(&self) -> bool {
401 self.type_() == ItemType::ExternCrate
404 pub fn is_stripped(&self) -> bool {
405 match self.inner { StrippedItem(..) => true, _ => false }
407 pub fn has_stripped_fields(&self) -> Option<bool> {
409 StructItem(ref _struct) => Some(_struct.fields_stripped),
410 UnionItem(ref union) => Some(union.fields_stripped),
411 VariantItem(Variant { kind: VariantKind::Struct(ref vstruct)} ) => {
412 Some(vstruct.fields_stripped)
418 pub fn stability_class(&self) -> Option<String> {
419 self.stability.as_ref().and_then(|ref s| {
420 let mut classes = Vec::with_capacity(2);
422 if s.level == stability::Unstable {
423 classes.push("unstable");
426 if !s.deprecated_since.is_empty() {
427 classes.push("deprecated");
430 if classes.len() != 0 {
431 Some(classes.join(" "))
438 pub fn stable_since(&self) -> Option<&str> {
439 self.stability.as_ref().map(|s| &s.since[..])
442 /// Returns a documentation-level item type from the item.
443 pub fn type_(&self) -> ItemType {
448 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
450 ExternCrateItem(String, Option<String>),
455 FunctionItem(Function),
457 TypedefItem(Typedef, bool /* is associated type */),
459 ConstantItem(Constant),
462 /// A method signature only. Used for required methods in traits (ie,
463 /// non-default-methods).
464 TyMethodItem(TyMethod),
465 /// A method with a body.
467 StructFieldItem(Type),
468 VariantItem(Variant),
469 /// `fn`s from an extern block
470 ForeignFunctionItem(Function),
471 /// `static`s from an extern block
472 ForeignStaticItem(Static),
473 /// `type`s from an extern block
476 PrimitiveItem(PrimitiveType),
477 AssociatedConstItem(Type, Option<String>),
478 AssociatedTypeItem(Vec<TyParamBound>, Option<Type>),
479 /// An item that has been stripped by a rustdoc pass
480 StrippedItem(Box<ItemEnum>),
484 pub fn generics(&self) -> Option<&Generics> {
486 ItemEnum::StructItem(ref s) => &s.generics,
487 ItemEnum::EnumItem(ref e) => &e.generics,
488 ItemEnum::FunctionItem(ref f) => &f.generics,
489 ItemEnum::TypedefItem(ref t, _) => &t.generics,
490 ItemEnum::TraitItem(ref t) => &t.generics,
491 ItemEnum::ImplItem(ref i) => &i.generics,
492 ItemEnum::TyMethodItem(ref i) => &i.generics,
493 ItemEnum::MethodItem(ref i) => &i.generics,
494 ItemEnum::ForeignFunctionItem(ref f) => &f.generics,
500 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
502 pub items: Vec<Item>,
506 impl Clean<Item> for doctree::Module {
507 fn clean(&self, cx: &DocContext) -> Item {
508 let name = if self.name.is_some() {
509 self.name.unwrap().clean(cx)
514 // maintain a stack of mod ids, for doc comment path resolution
515 // but we also need to resolve the module's own docs based on whether its docs were written
516 // inside or outside the module, so check for that
517 let attrs = if self.attrs.iter()
518 .filter(|a| a.check_name("doc"))
520 .map_or(true, |a| a.style == AttrStyle::Inner) {
521 // inner doc comment, use the module's own scope for resolution
522 cx.mod_ids.borrow_mut().push(self.id);
525 // outer doc comment, use its parent's scope
526 let attrs = self.attrs.clean(cx);
527 cx.mod_ids.borrow_mut().push(self.id);
531 let mut items: Vec<Item> = vec![];
532 items.extend(self.extern_crates.iter().map(|x| x.clean(cx)));
533 items.extend(self.imports.iter().flat_map(|x| x.clean(cx)));
534 items.extend(self.structs.iter().flat_map(|x| x.clean(cx)));
535 items.extend(self.unions.iter().flat_map(|x| x.clean(cx)));
536 items.extend(self.enums.iter().flat_map(|x| x.clean(cx)));
537 items.extend(self.fns.iter().map(|x| x.clean(cx)));
538 items.extend(self.foreigns.iter().flat_map(|x| x.clean(cx)));
539 items.extend(self.mods.iter().map(|x| x.clean(cx)));
540 items.extend(self.typedefs.iter().map(|x| x.clean(cx)));
541 items.extend(self.statics.iter().map(|x| x.clean(cx)));
542 items.extend(self.constants.iter().map(|x| x.clean(cx)));
543 items.extend(self.traits.iter().map(|x| x.clean(cx)));
544 items.extend(self.impls.iter().flat_map(|x| x.clean(cx)));
545 items.extend(self.macros.iter().map(|x| x.clean(cx)));
547 cx.mod_ids.borrow_mut().pop();
549 // determine if we should display the inner contents or
550 // the outer `mod` item for the source code.
552 let cm = cx.sess().codemap();
553 let outer = cm.lookup_char_pos(self.where_outer.lo());
554 let inner = cm.lookup_char_pos(self.where_inner.lo());
555 if outer.file.start_pos == inner.file.start_pos {
559 // mod foo; (and a separate FileMap for the contents)
567 source: whence.clean(cx),
568 visibility: self.vis.clean(cx),
569 stability: self.stab.clean(cx),
570 deprecation: self.depr.clean(cx),
571 def_id: cx.tcx.hir.local_def_id(self.id),
572 inner: ModuleItem(Module {
573 is_crate: self.is_crate,
580 pub struct ListAttributesIter<'a> {
581 attrs: slice::Iter<'a, ast::Attribute>,
582 current_list: vec::IntoIter<ast::NestedMetaItem>,
586 impl<'a> Iterator for ListAttributesIter<'a> {
587 type Item = ast::NestedMetaItem;
589 fn next(&mut self) -> Option<Self::Item> {
590 if let Some(nested) = self.current_list.next() {
594 for attr in &mut self.attrs {
595 if let Some(list) = attr.meta_item_list() {
596 if attr.check_name(self.name) {
597 self.current_list = list.into_iter();
598 if let Some(nested) = self.current_list.next() {
608 fn size_hint(&self) -> (usize, Option<usize>) {
609 let lower = self.current_list.len();
614 pub trait AttributesExt {
615 /// Finds an attribute as List and returns the list of attributes nested inside.
616 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a>;
619 impl AttributesExt for [ast::Attribute] {
620 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a> {
623 current_list: Vec::new().into_iter(),
629 pub trait NestedAttributesExt {
630 /// Returns whether the attribute list contains a specific `Word`
631 fn has_word(self, word: &str) -> bool;
634 impl<I: IntoIterator<Item=ast::NestedMetaItem>> NestedAttributesExt for I {
635 fn has_word(self, word: &str) -> bool {
636 self.into_iter().any(|attr| attr.is_word() && attr.check_name(word))
640 /// A portion of documentation, extracted from a `#[doc]` attribute.
642 /// Each variant contains the line number within the complete doc-comment where the fragment
643 /// starts, as well as the Span where the corresponding doc comment or attribute is located.
645 /// Included files are kept separate from inline doc comments so that proper line-number
646 /// information can be given when a doctest fails. Sugared doc comments and "raw" doc comments are
647 /// kept separate because of issue #42760.
648 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
649 pub enum DocFragment {
650 // FIXME #44229 (misdreavus): sugared and raw doc comments can be brought back together once
651 // hoedown is completely removed from rustdoc.
652 /// A doc fragment created from a `///` or `//!` doc comment.
653 SugaredDoc(usize, syntax_pos::Span, String),
654 /// A doc fragment created from a "raw" `#[doc=""]` attribute.
655 RawDoc(usize, syntax_pos::Span, String),
656 /// A doc fragment created from a `#[doc(include="filename")]` attribute. Contains both the
657 /// given filename and the file contents.
658 Include(usize, syntax_pos::Span, String, String),
662 pub fn as_str(&self) -> &str {
664 DocFragment::SugaredDoc(_, _, ref s) => &s[..],
665 DocFragment::RawDoc(_, _, ref s) => &s[..],
666 DocFragment::Include(_, _, _, ref s) => &s[..],
670 pub fn span(&self) -> syntax_pos::Span {
672 DocFragment::SugaredDoc(_, span, _) |
673 DocFragment::RawDoc(_, span, _) |
674 DocFragment::Include(_, span, _, _) => span,
679 impl<'a> FromIterator<&'a DocFragment> for String {
680 fn from_iter<T>(iter: T) -> Self
682 T: IntoIterator<Item = &'a DocFragment>
684 iter.into_iter().fold(String::new(), |mut acc, frag| {
689 DocFragment::SugaredDoc(_, _, ref docs)
690 | DocFragment::RawDoc(_, _, ref docs)
691 | DocFragment::Include(_, _, _, ref docs) =>
700 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Default, Hash)]
701 pub struct Attributes {
702 pub doc_strings: Vec<DocFragment>,
703 pub other_attrs: Vec<ast::Attribute>,
704 pub cfg: Option<Rc<Cfg>>,
705 pub span: Option<syntax_pos::Span>,
706 /// map from Rust paths to resolved defs and potential URL fragments
707 pub links: Vec<(String, Option<DefId>, Option<String>)>,
711 /// Extracts the content from an attribute `#[doc(cfg(content))]`.
712 fn extract_cfg(mi: &ast::MetaItem) -> Option<&ast::MetaItem> {
713 use syntax::ast::NestedMetaItemKind::MetaItem;
715 if let ast::MetaItemKind::List(ref nmis) = mi.node {
717 if let MetaItem(ref cfg_mi) = nmis[0].node {
718 if cfg_mi.check_name("cfg") {
719 if let ast::MetaItemKind::List(ref cfg_nmis) = cfg_mi.node {
720 if cfg_nmis.len() == 1 {
721 if let MetaItem(ref content_mi) = cfg_nmis[0].node {
722 return Some(content_mi);
734 /// Reads a `MetaItem` from within an attribute, looks for whether it is a
735 /// `#[doc(include="file")]`, and returns the filename and contents of the file as loaded from
737 fn extract_include(mi: &ast::MetaItem)
738 -> Option<(String, String)>
740 mi.meta_item_list().and_then(|list| {
742 if meta.check_name("include") {
743 // the actual compiled `#[doc(include="filename")]` gets expanded to
744 // `#[doc(include(file="filename", contents="file contents")]` so we need to
745 // look for that instead
746 return meta.meta_item_list().and_then(|list| {
747 let mut filename: Option<String> = None;
748 let mut contents: Option<String> = None;
751 if it.check_name("file") {
752 if let Some(name) = it.value_str() {
753 filename = Some(name.to_string());
755 } else if it.check_name("contents") {
756 if let Some(docs) = it.value_str() {
757 contents = Some(docs.to_string());
762 if let (Some(filename), Some(contents)) = (filename, contents) {
763 Some((filename, contents))
775 pub fn has_doc_flag(&self, flag: &str) -> bool {
776 for attr in &self.other_attrs {
777 if !attr.check_name("doc") { continue; }
779 if let Some(items) = attr.meta_item_list() {
780 if items.iter().filter_map(|i| i.meta_item()).any(|it| it.check_name(flag)) {
789 pub fn from_ast(diagnostic: &::errors::Handler,
790 attrs: &[ast::Attribute]) -> Attributes {
791 let mut doc_strings = vec![];
793 let mut cfg = Cfg::True;
794 let mut doc_line = 0;
796 let other_attrs = attrs.iter().filter_map(|attr| {
797 attr.with_desugared_doc(|attr| {
798 if attr.check_name("doc") {
799 if let Some(mi) = attr.meta() {
800 if let Some(value) = mi.value_str() {
801 // Extracted #[doc = "..."]
802 let value = value.to_string();
804 doc_line += value.lines().count();
806 if attr.is_sugared_doc {
807 doc_strings.push(DocFragment::SugaredDoc(line, attr.span, value));
809 doc_strings.push(DocFragment::RawDoc(line, attr.span, value));
813 sp = Some(attr.span);
816 } else if let Some(cfg_mi) = Attributes::extract_cfg(&mi) {
817 // Extracted #[doc(cfg(...))]
818 match Cfg::parse(cfg_mi) {
819 Ok(new_cfg) => cfg &= new_cfg,
820 Err(e) => diagnostic.span_err(e.span, e.msg),
823 } else if let Some((filename, contents)) = Attributes::extract_include(&mi)
826 doc_line += contents.lines().count();
827 doc_strings.push(DocFragment::Include(line,
838 // treat #[target_feature(enable = "feat")] attributes as if they were
839 // #[doc(cfg(target_feature = "feat"))] attributes as well
840 for attr in attrs.lists("target_feature") {
841 if attr.check_name("enable") {
842 if let Some(feat) = attr.value_str() {
843 let meta = attr::mk_name_value_item_str(Ident::from_str("target_feature"),
844 dummy_spanned(feat));
845 if let Ok(feat_cfg) = Cfg::parse(&meta) {
855 cfg: if cfg == Cfg::True { None } else { Some(Rc::new(cfg)) },
861 /// Finds the `doc` attribute as a NameValue and returns the corresponding
863 pub fn doc_value<'a>(&'a self) -> Option<&'a str> {
864 self.doc_strings.first().map(|s| s.as_str())
867 /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined
869 pub fn collapsed_doc_value(&self) -> Option<String> {
870 if !self.doc_strings.is_empty() {
871 Some(self.doc_strings.iter().collect())
877 /// Get links as a vector
879 /// Cache must be populated before call
880 pub fn links(&self, krate: &CrateNum) -> Vec<(String, String)> {
881 use html::format::href;
882 self.links.iter().filter_map(|&(ref s, did, ref fragment)| {
885 if let Some((mut href, ..)) = href(did) {
886 if let Some(ref fragment) = *fragment {
888 href.push_str(fragment);
890 Some((s.clone(), href))
896 if let Some(ref fragment) = *fragment {
898 let url = match cache.extern_locations.get(krate) {
899 Some(&(_, ref src, ExternalLocation::Local)) =>
900 src.to_str().expect("invalid file path"),
901 Some(&(_, _, ExternalLocation::Remote(ref s))) => s,
902 Some(&(_, _, ExternalLocation::Unknown)) | None =>
903 "https://doc.rust-lang.org/nightly",
905 // This is a primitive so the url is done "by hand".
907 format!("{}{}std/primitive.{}.html",
909 if !url.ends_with('/') { "/" } else { "" },
912 panic!("This isn't a primitive?!");
920 impl AttributesExt for Attributes {
921 fn lists<'a>(&'a self, name: &'a str) -> ListAttributesIter<'a> {
922 self.other_attrs.lists(name)
926 /// Given a def, returns its name and disambiguator
927 /// for a value namespace
929 /// Returns None for things which cannot be ambiguous since
930 /// they exist in both namespaces (structs and modules)
931 fn value_ns_kind(def: Def, path_str: &str) -> Option<(&'static str, String)> {
933 // structs, variants, and mods exist in both namespaces. skip them
934 Def::StructCtor(..) | Def::Mod(..) | Def::Variant(..) | Def::VariantCtor(..) => None,
936 => Some(("function", format!("{}()", path_str))),
938 => Some(("method", format!("{}()", path_str))),
940 => Some(("const", format!("const@{}", path_str))),
942 => Some(("static", format!("static@{}", path_str))),
943 _ => Some(("value", format!("value@{}", path_str))),
947 /// Given a def, returns its name, the article to be used, and a disambiguator
948 /// for the type namespace
949 fn type_ns_kind(def: Def, path_str: &str) -> (&'static str, &'static str, String) {
950 let (kind, article) = match def {
951 // we can still have non-tuple structs
952 Def::Struct(..) => ("struct", "a"),
953 Def::Enum(..) => ("enum", "an"),
954 Def::Trait(..) => ("trait", "a"),
955 Def::Union(..) => ("union", "a"),
958 (kind, article, format!("{}@{}", kind, path_str))
961 fn ambiguity_error(cx: &DocContext, attrs: &Attributes,
963 article1: &str, kind1: &str, disambig1: &str,
964 article2: &str, kind2: &str, disambig2: &str) {
965 let sp = attrs.doc_strings.first()
966 .map_or(DUMMY_SP, |a| a.span());
968 .struct_span_warn(sp,
969 &format!("`{}` is both {} {} and {} {}",
970 path_str, article1, kind1,
972 .help(&format!("try `{}` if you want to select the {}, \
973 or `{}` if you want to \
975 disambig1, kind1, disambig2,
980 /// Given an enum variant's def, return the def of its enum and the associated fragment
981 fn handle_variant(cx: &DocContext, def: Def) -> Result<(Def, Option<String>), ()> {
982 use rustc::ty::DefIdTree;
984 let parent = if let Some(parent) = cx.tcx.parent(def.def_id()) {
989 let parent_def = Def::Enum(parent);
990 let variant = cx.tcx.expect_variant_def(def);
991 Ok((parent_def, Some(format!("{}.v", variant.name))))
994 const PRIMITIVES: &[(&str, Def)] = &[
995 ("u8", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U8))),
996 ("u16", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U16))),
997 ("u32", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U32))),
998 ("u64", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U64))),
999 ("u128", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::U128))),
1000 ("usize", Def::PrimTy(hir::PrimTy::TyUint(syntax::ast::UintTy::Usize))),
1001 ("i8", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I8))),
1002 ("i16", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I16))),
1003 ("i32", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I32))),
1004 ("i64", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I64))),
1005 ("i128", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::I128))),
1006 ("isize", Def::PrimTy(hir::PrimTy::TyInt(syntax::ast::IntTy::Isize))),
1007 ("f32", Def::PrimTy(hir::PrimTy::TyFloat(syntax::ast::FloatTy::F32))),
1008 ("f64", Def::PrimTy(hir::PrimTy::TyFloat(syntax::ast::FloatTy::F64))),
1009 ("str", Def::PrimTy(hir::PrimTy::TyStr)),
1010 ("bool", Def::PrimTy(hir::PrimTy::TyBool)),
1011 ("char", Def::PrimTy(hir::PrimTy::TyChar)),
1014 fn is_primitive(path_str: &str, is_val: bool) -> Option<Def> {
1018 PRIMITIVES.iter().find(|x| x.0 == path_str).map(|x| x.1)
1022 /// Resolve a given string as a path, along with whether or not it is
1023 /// in the value namespace. Also returns an optional URL fragment in the case
1024 /// of variants and methods
1025 fn resolve(cx: &DocContext, path_str: &str, is_val: bool) -> Result<(Def, Option<String>), ()> {
1026 // In case we're in a module, try to resolve the relative
1028 if let Some(id) = cx.mod_ids.borrow().last() {
1029 let result = cx.resolver.borrow_mut()
1032 resolver.resolve_str_path_error(DUMMY_SP,
1036 if let Ok(result) = result {
1037 // In case this is a trait item, skip the
1038 // early return and try looking for the trait
1039 let value = match result.def {
1040 Def::Method(_) | Def::AssociatedConst(_) => true,
1041 Def::AssociatedTy(_) => false,
1042 Def::Variant(_) => return handle_variant(cx, result.def),
1043 // not a trait item, just return what we found
1044 _ => return Ok((result.def, None))
1047 if value != is_val {
1050 } else if let Some(prim) = is_primitive(path_str, is_val) {
1051 return Ok((prim, Some(path_str.to_owned())))
1053 // If resolution failed, it may still be a method
1054 // because methods are not handled by the resolver
1055 // If so, bail when we're not looking for a value
1061 // Try looking for methods and associated items
1062 let mut split = path_str.rsplitn(2, "::");
1063 let mut item_name = if let Some(first) = split.next() {
1069 let mut path = if let Some(second) = split.next() {
1075 let ty = cx.resolver.borrow_mut()
1078 resolver.resolve_str_path_error(DUMMY_SP, &path, false)
1081 Def::Struct(did) | Def::Union(did) | Def::Enum(did) | Def::TyAlias(did) => {
1082 let item = cx.tcx.inherent_impls(did).iter()
1083 .flat_map(|imp| cx.tcx.associated_items(*imp))
1084 .find(|item| item.name == item_name);
1085 if let Some(item) = item {
1086 let out = match item.kind {
1087 ty::AssociatedKind::Method if is_val => "method",
1088 ty::AssociatedKind::Const if is_val => "associatedconstant",
1091 Ok((ty.def, Some(format!("{}.{}", out, item_name))))
1093 let is_enum = match ty.def {
1094 Def::Enum(_) => true,
1097 let elem = if is_enum {
1098 cx.tcx.adt_def(did).all_fields().find(|item| item.name == item_name)
1104 .find(|item| item.name == item_name)
1106 if let Some(item) = elem {
1108 Some(format!("{}.{}",
1109 if is_enum { "variant" } else { "structfield" },
1116 Def::Trait(did) => {
1117 let item = cx.tcx.associated_item_def_ids(did).iter()
1118 .map(|item| cx.tcx.associated_item(*item))
1119 .find(|item| item.name == item_name);
1120 if let Some(item) = item {
1121 let kind = match item.kind {
1122 ty::AssociatedKind::Const if is_val => "associatedconstant",
1123 ty::AssociatedKind::Type if !is_val => "associatedtype",
1124 ty::AssociatedKind::Method if is_val => {
1125 if item.defaultness.has_value() {
1134 Ok((ty.def, Some(format!("{}.{}", kind, item_name))))
1146 /// Resolve a string as a macro
1147 fn macro_resolve(cx: &DocContext, path_str: &str) -> Option<Def> {
1148 use syntax::ext::base::{MacroKind, SyntaxExtension};
1149 use syntax::ext::hygiene::Mark;
1150 let segment = ast::PathSegment::from_ident(Ident::from_str(path_str));
1151 let path = ast::Path { segments: vec![segment], span: DUMMY_SP };
1152 let mut resolver = cx.resolver.borrow_mut();
1153 let mark = Mark::root();
1155 .resolve_macro_to_def_inner(mark, &path, MacroKind::Bang, false);
1156 if let Ok(def) = res {
1157 if let SyntaxExtension::DeclMacro(..) = *resolver.get_macro(def) {
1162 } else if let Some(def) = resolver.all_macros.get(&Symbol::intern(path_str)) {
1171 /// can be either value or type, not a macro
1175 /// values, functions, consts, statics, everything in the value namespace
1177 /// types, traits, everything in the type namespace
1181 fn resolution_failure(cx: &DocContext, path_str: &str) {
1182 cx.sess().warn(&format!("[{}] cannot be resolved, ignoring it...", path_str));
1185 impl Clean<Attributes> for [ast::Attribute] {
1186 fn clean(&self, cx: &DocContext) -> Attributes {
1187 let mut attrs = Attributes::from_ast(cx.sess().diagnostic(), self);
1189 if UnstableFeatures::from_environment().is_nightly_build() {
1190 let dox = attrs.collapsed_doc_value().unwrap_or_else(String::new);
1191 for ori_link in markdown_links(&dox) {
1192 // bail early for real links
1193 if ori_link.contains('/') {
1196 let link = ori_link.replace("`", "");
1197 let (def, fragment) = {
1198 let mut kind = PathKind::Unknown;
1199 let path_str = if let Some(prefix) =
1200 ["struct@", "enum@", "type@",
1201 "trait@", "union@"].iter()
1202 .find(|p| link.starts_with(**p)) {
1203 kind = PathKind::Type;
1204 link.trim_left_matches(prefix)
1205 } else if let Some(prefix) =
1206 ["const@", "static@",
1207 "value@", "function@", "mod@",
1208 "fn@", "module@", "method@"]
1209 .iter().find(|p| link.starts_with(**p)) {
1210 kind = PathKind::Value;
1211 link.trim_left_matches(prefix)
1212 } else if link.ends_with("()") {
1213 kind = PathKind::Value;
1214 link.trim_right_matches("()")
1215 } else if link.starts_with("macro@") {
1216 kind = PathKind::Macro;
1217 link.trim_left_matches("macro@")
1218 } else if link.ends_with('!') {
1219 kind = PathKind::Macro;
1220 link.trim_right_matches('!')
1225 if path_str.contains(|ch: char| !(ch.is_alphanumeric() ||
1226 ch == ':' || ch == '_')) {
1231 PathKind::Value => {
1232 if let Ok(def) = resolve(cx, path_str, true) {
1235 resolution_failure(cx, path_str);
1236 // this could just be a normal link or a broken link
1237 // we could potentially check if something is
1238 // "intra-doc-link-like" and warn in that case
1243 if let Ok(def) = resolve(cx, path_str, false) {
1246 resolution_failure(cx, path_str);
1247 // this could just be a normal link
1251 PathKind::Unknown => {
1253 if let Some(macro_def) = macro_resolve(cx, path_str) {
1254 if let Ok(type_def) = resolve(cx, path_str, false) {
1255 let (type_kind, article, type_disambig)
1256 = type_ns_kind(type_def.0, path_str);
1257 ambiguity_error(cx, &attrs, path_str,
1258 article, type_kind, &type_disambig,
1259 "a", "macro", &format!("macro@{}", path_str));
1261 } else if let Ok(value_def) = resolve(cx, path_str, true) {
1262 let (value_kind, value_disambig)
1263 = value_ns_kind(value_def.0, path_str)
1264 .expect("struct and mod cases should have been \
1265 caught in previous branch");
1266 ambiguity_error(cx, &attrs, path_str,
1267 "a", value_kind, &value_disambig,
1268 "a", "macro", &format!("macro@{}", path_str));
1271 } else if let Ok(type_def) = resolve(cx, path_str, false) {
1272 // It is imperative we search for not-a-value first
1273 // Otherwise we will find struct ctors for when we are looking
1274 // for structs, and the link won't work.
1275 // if there is something in both namespaces
1276 if let Ok(value_def) = resolve(cx, path_str, true) {
1277 let kind = value_ns_kind(value_def.0, path_str);
1278 if let Some((value_kind, value_disambig)) = kind {
1279 let (type_kind, article, type_disambig)
1280 = type_ns_kind(type_def.0, path_str);
1281 ambiguity_error(cx, &attrs, path_str,
1282 article, type_kind, &type_disambig,
1283 "a", value_kind, &value_disambig);
1288 } else if let Ok(value_def) = resolve(cx, path_str, true) {
1291 resolution_failure(cx, path_str);
1292 // this could just be a normal link
1296 PathKind::Macro => {
1297 if let Some(def) = macro_resolve(cx, path_str) {
1300 resolution_failure(cx, path_str);
1307 if let Def::PrimTy(_) = def {
1308 attrs.links.push((ori_link, None, fragment));
1310 let id = register_def(cx, def);
1311 attrs.links.push((ori_link, Some(id), fragment));
1315 cx.sess().abort_if_errors();
1322 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1323 pub struct TyParam {
1326 pub bounds: Vec<TyParamBound>,
1327 pub default: Option<Type>,
1328 pub synthetic: Option<hir::SyntheticTyParamKind>,
1331 impl Clean<TyParam> for hir::TyParam {
1332 fn clean(&self, cx: &DocContext) -> TyParam {
1334 name: self.name.clean(cx),
1335 did: cx.tcx.hir.local_def_id(self.id),
1336 bounds: self.bounds.clean(cx),
1337 default: self.default.clean(cx),
1338 synthetic: self.synthetic,
1343 impl<'tcx> Clean<TyParam> for ty::TypeParameterDef {
1344 fn clean(&self, cx: &DocContext) -> TyParam {
1345 cx.renderinfo.borrow_mut().external_typarams.insert(self.def_id, self.name.clean(cx));
1347 name: self.name.clean(cx),
1349 bounds: vec![], // these are filled in from the where-clauses
1350 default: if self.has_default {
1351 Some(cx.tcx.type_of(self.def_id).clean(cx))
1360 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1361 pub enum TyParamBound {
1362 RegionBound(Lifetime),
1363 TraitBound(PolyTrait, hir::TraitBoundModifier)
1367 fn maybe_sized(cx: &DocContext) -> TyParamBound {
1368 let did = cx.tcx.require_lang_item(lang_items::SizedTraitLangItem);
1369 let empty = cx.tcx.intern_substs(&[]);
1370 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
1371 Some(did), false, vec![], empty);
1372 inline::record_extern_fqn(cx, did, TypeKind::Trait);
1373 TraitBound(PolyTrait {
1374 trait_: ResolvedPath {
1380 generic_params: Vec::new(),
1381 }, hir::TraitBoundModifier::Maybe)
1384 fn is_sized_bound(&self, cx: &DocContext) -> bool {
1385 use rustc::hir::TraitBoundModifier as TBM;
1386 if let TyParamBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self {
1387 if trait_.def_id() == cx.tcx.lang_items().sized_trait() {
1394 fn get_poly_trait(&self) -> Option<PolyTrait> {
1395 if let TyParamBound::TraitBound(ref p, _) = *self {
1396 return Some(p.clone())
1401 fn get_trait_type(&self) -> Option<Type> {
1403 if let TyParamBound::TraitBound(PolyTrait { ref trait_, .. }, _) = *self {
1404 return Some(trait_.clone());
1410 impl Clean<TyParamBound> for hir::TyParamBound {
1411 fn clean(&self, cx: &DocContext) -> TyParamBound {
1413 hir::RegionTyParamBound(lt) => RegionBound(lt.clean(cx)),
1414 hir::TraitTyParamBound(ref t, modifier) => TraitBound(t.clean(cx), modifier),
1419 fn external_path_params(cx: &DocContext, trait_did: Option<DefId>, has_self: bool,
1420 bindings: Vec<TypeBinding>, substs: &Substs) -> PathParameters {
1421 let lifetimes = substs.regions().filter_map(|v| v.clean(cx)).collect();
1422 let types = substs.types().skip(has_self as usize).collect::<Vec<_>>();
1425 // Attempt to sugar an external path like Fn<(A, B,), C> to Fn(A, B) -> C
1426 Some(did) if cx.tcx.lang_items().fn_trait_kind(did).is_some() => {
1427 assert_eq!(types.len(), 1);
1428 let inputs = match types[0].sty {
1429 ty::TyTuple(ref tys) => tys.iter().map(|t| t.clean(cx)).collect(),
1431 return PathParameters::AngleBracketed {
1433 types: types.clean(cx),
1439 // FIXME(#20299) return type comes from a projection now
1440 // match types[1].sty {
1441 // ty::TyTuple(ref v) if v.is_empty() => None, // -> ()
1442 // _ => Some(types[1].clean(cx))
1444 PathParameters::Parenthesized {
1450 PathParameters::AngleBracketed {
1452 types: types.clean(cx),
1459 // trait_did should be set to a trait's DefId if called on a TraitRef, in order to sugar
1460 // from Fn<(A, B,), C> to Fn(A, B) -> C
1461 fn external_path(cx: &DocContext, name: &str, trait_did: Option<DefId>, has_self: bool,
1462 bindings: Vec<TypeBinding>, substs: &Substs) -> Path {
1466 segments: vec![PathSegment {
1467 name: name.to_string(),
1468 params: external_path_params(cx, trait_did, has_self, bindings, substs)
1473 impl<'a, 'tcx> Clean<TyParamBound> for (&'a ty::TraitRef<'tcx>, Vec<TypeBinding>) {
1474 fn clean(&self, cx: &DocContext) -> TyParamBound {
1475 let (trait_ref, ref bounds) = *self;
1476 inline::record_extern_fqn(cx, trait_ref.def_id, TypeKind::Trait);
1477 let path = external_path(cx, &cx.tcx.item_name(trait_ref.def_id).as_str(),
1478 Some(trait_ref.def_id), true, bounds.clone(), trait_ref.substs);
1480 debug!("ty::TraitRef\n subst: {:?}\n", trait_ref.substs);
1482 // collect any late bound regions
1483 let mut late_bounds = vec![];
1484 for ty_s in trait_ref.input_types().skip(1) {
1485 if let ty::TyTuple(ts) = ty_s.sty {
1487 if let ty::TyRef(ref reg, _) = ty_s.sty {
1488 if let &ty::RegionKind::ReLateBound(..) = *reg {
1489 debug!(" hit an ReLateBound {:?}", reg);
1490 if let Some(lt) = reg.clean(cx) {
1491 late_bounds.push(GenericParam::Lifetime(lt));
1501 trait_: ResolvedPath {
1504 did: trait_ref.def_id,
1507 generic_params: late_bounds,
1509 hir::TraitBoundModifier::None
1514 impl<'tcx> Clean<TyParamBound> for ty::TraitRef<'tcx> {
1515 fn clean(&self, cx: &DocContext) -> TyParamBound {
1516 (self, vec![]).clean(cx)
1520 impl<'tcx> Clean<Option<Vec<TyParamBound>>> for Substs<'tcx> {
1521 fn clean(&self, cx: &DocContext) -> Option<Vec<TyParamBound>> {
1522 let mut v = Vec::new();
1523 v.extend(self.regions().filter_map(|r| r.clean(cx))
1525 v.extend(self.types().map(|t| TraitBound(PolyTrait {
1526 trait_: t.clean(cx),
1527 generic_params: Vec::new(),
1528 }, hir::TraitBoundModifier::None)));
1529 if !v.is_empty() {Some(v)} else {None}
1533 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1534 pub struct Lifetime(String);
1537 pub fn get_ref<'a>(&'a self) -> &'a str {
1538 let Lifetime(ref s) = *self;
1543 pub fn statik() -> Lifetime {
1544 Lifetime("'static".to_string())
1548 impl Clean<Lifetime> for hir::Lifetime {
1549 fn clean(&self, cx: &DocContext) -> Lifetime {
1550 if self.id != ast::DUMMY_NODE_ID {
1551 let hir_id = cx.tcx.hir.node_to_hir_id(self.id);
1552 let def = cx.tcx.named_region(hir_id);
1554 Some(rl::Region::EarlyBound(_, node_id, _)) |
1555 Some(rl::Region::LateBound(_, node_id, _)) |
1556 Some(rl::Region::Free(_, node_id)) => {
1557 if let Some(lt) = cx.lt_substs.borrow().get(&node_id).cloned() {
1564 Lifetime(self.name.name().to_string())
1568 impl Clean<Lifetime> for hir::LifetimeDef {
1569 fn clean(&self, _: &DocContext) -> Lifetime {
1570 if self.bounds.len() > 0 {
1571 let mut s = format!("{}: {}",
1572 self.lifetime.name.name(),
1573 self.bounds[0].name.name());
1574 for bound in self.bounds.iter().skip(1) {
1575 s.push_str(&format!(" + {}", bound.name.name()));
1579 Lifetime(self.lifetime.name.name().to_string())
1584 impl Clean<Lifetime> for ty::RegionParameterDef {
1585 fn clean(&self, _: &DocContext) -> Lifetime {
1586 Lifetime(self.name.to_string())
1590 impl Clean<Option<Lifetime>> for ty::RegionKind {
1591 fn clean(&self, cx: &DocContext) -> Option<Lifetime> {
1593 ty::ReStatic => Some(Lifetime::statik()),
1594 ty::ReLateBound(_, ty::BrNamed(_, name)) => Some(Lifetime(name.to_string())),
1595 ty::ReEarlyBound(ref data) => Some(Lifetime(data.name.clean(cx))),
1597 ty::ReLateBound(..) |
1601 ty::ReSkolemized(..) |
1603 ty::ReClosureBound(_) |
1604 ty::ReCanonical(_) |
1605 ty::ReErased => None
1610 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1611 pub enum WherePredicate {
1612 BoundPredicate { ty: Type, bounds: Vec<TyParamBound> },
1613 RegionPredicate { lifetime: Lifetime, bounds: Vec<Lifetime>},
1614 EqPredicate { lhs: Type, rhs: Type },
1617 impl Clean<WherePredicate> for hir::WherePredicate {
1618 fn clean(&self, cx: &DocContext) -> WherePredicate {
1620 hir::WherePredicate::BoundPredicate(ref wbp) => {
1621 WherePredicate::BoundPredicate {
1622 ty: wbp.bounded_ty.clean(cx),
1623 bounds: wbp.bounds.clean(cx)
1627 hir::WherePredicate::RegionPredicate(ref wrp) => {
1628 WherePredicate::RegionPredicate {
1629 lifetime: wrp.lifetime.clean(cx),
1630 bounds: wrp.bounds.clean(cx)
1634 hir::WherePredicate::EqPredicate(ref wrp) => {
1635 WherePredicate::EqPredicate {
1636 lhs: wrp.lhs_ty.clean(cx),
1637 rhs: wrp.rhs_ty.clean(cx)
1644 impl<'a> Clean<WherePredicate> for ty::Predicate<'a> {
1645 fn clean(&self, cx: &DocContext) -> WherePredicate {
1646 use rustc::ty::Predicate;
1649 Predicate::Trait(ref pred) => pred.clean(cx),
1650 Predicate::Subtype(ref pred) => pred.clean(cx),
1651 Predicate::RegionOutlives(ref pred) => pred.clean(cx),
1652 Predicate::TypeOutlives(ref pred) => pred.clean(cx),
1653 Predicate::Projection(ref pred) => pred.clean(cx),
1654 Predicate::WellFormed(_) => panic!("not user writable"),
1655 Predicate::ObjectSafe(_) => panic!("not user writable"),
1656 Predicate::ClosureKind(..) => panic!("not user writable"),
1657 Predicate::ConstEvaluatable(..) => panic!("not user writable"),
1662 impl<'a> Clean<WherePredicate> for ty::TraitPredicate<'a> {
1663 fn clean(&self, cx: &DocContext) -> WherePredicate {
1664 WherePredicate::BoundPredicate {
1665 ty: self.trait_ref.self_ty().clean(cx),
1666 bounds: vec![self.trait_ref.clean(cx)]
1671 impl<'tcx> Clean<WherePredicate> for ty::SubtypePredicate<'tcx> {
1672 fn clean(&self, _cx: &DocContext) -> WherePredicate {
1673 panic!("subtype predicates are an internal rustc artifact \
1674 and should not be seen by rustdoc")
1678 impl<'tcx> Clean<WherePredicate> for ty::OutlivesPredicate<ty::Region<'tcx>, ty::Region<'tcx>> {
1679 fn clean(&self, cx: &DocContext) -> WherePredicate {
1680 let ty::OutlivesPredicate(ref a, ref b) = *self;
1681 WherePredicate::RegionPredicate {
1682 lifetime: a.clean(cx).unwrap(),
1683 bounds: vec![b.clean(cx).unwrap()]
1688 impl<'tcx> Clean<WherePredicate> for ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>> {
1689 fn clean(&self, cx: &DocContext) -> WherePredicate {
1690 let ty::OutlivesPredicate(ref ty, ref lt) = *self;
1692 WherePredicate::BoundPredicate {
1694 bounds: vec![TyParamBound::RegionBound(lt.clean(cx).unwrap())]
1699 impl<'tcx> Clean<WherePredicate> for ty::ProjectionPredicate<'tcx> {
1700 fn clean(&self, cx: &DocContext) -> WherePredicate {
1701 WherePredicate::EqPredicate {
1702 lhs: self.projection_ty.clean(cx),
1703 rhs: self.ty.clean(cx)
1708 impl<'tcx> Clean<Type> for ty::ProjectionTy<'tcx> {
1709 fn clean(&self, cx: &DocContext) -> Type {
1710 let trait_ = match self.trait_ref(cx.tcx).clean(cx) {
1711 TyParamBound::TraitBound(t, _) => t.trait_,
1712 TyParamBound::RegionBound(_) => {
1713 panic!("cleaning a trait got a region")
1717 name: cx.tcx.associated_item(self.item_def_id).name.clean(cx),
1718 self_type: box self.self_ty().clean(cx),
1724 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1725 pub enum GenericParam {
1731 pub fn is_synthetic_type_param(&self) -> bool {
1732 if let GenericParam::Type(ref t) = *self {
1733 t.synthetic.is_some()
1740 impl Clean<GenericParam> for hir::GenericParam {
1741 fn clean(&self, cx: &DocContext) -> GenericParam {
1743 hir::GenericParam::Lifetime(ref l) => GenericParam::Lifetime(l.clean(cx)),
1744 hir::GenericParam::Type(ref t) => GenericParam::Type(t.clean(cx)),
1749 // maybe use a Generic enum and use Vec<Generic>?
1750 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Default, Hash)]
1751 pub struct Generics {
1752 pub params: Vec<GenericParam>,
1753 pub where_predicates: Vec<WherePredicate>,
1756 impl Clean<Generics> for hir::Generics {
1757 fn clean(&self, cx: &DocContext) -> Generics {
1758 let mut g = Generics {
1759 params: self.params.clean(cx),
1760 where_predicates: self.where_clause.predicates.clean(cx)
1763 // Some duplicates are generated for ?Sized bounds between type params and where
1764 // predicates. The point in here is to move the bounds definitions from type params
1765 // to where predicates when such cases occur.
1766 for where_pred in &mut g.where_predicates {
1768 WherePredicate::BoundPredicate { ty: Generic(ref name), ref mut bounds } => {
1769 if bounds.is_empty() {
1770 for param in &mut g.params {
1771 if let GenericParam::Type(ref mut type_param) = *param {
1772 if &type_param.name == name {
1773 mem::swap(bounds, &mut type_param.bounds);
1787 impl<'a, 'tcx> Clean<Generics> for (&'a ty::Generics,
1788 &'a ty::GenericPredicates<'tcx>) {
1789 fn clean(&self, cx: &DocContext) -> Generics {
1790 use self::WherePredicate as WP;
1792 let (gens, preds) = *self;
1794 // Bounds in the type_params and lifetimes fields are repeated in the
1795 // predicates field (see rustc_typeck::collect::ty_generics), so remove
1797 let stripped_typarams = gens.types.iter().filter_map(|tp| {
1798 if tp.name == keywords::SelfType.name().as_str() {
1799 assert_eq!(tp.index, 0);
1804 }).collect::<Vec<_>>();
1806 let mut where_predicates = preds.predicates.to_vec().clean(cx);
1808 // Type parameters and have a Sized bound by default unless removed with
1809 // ?Sized. Scan through the predicates and mark any type parameter with
1810 // a Sized bound, removing the bounds as we find them.
1812 // Note that associated types also have a sized bound by default, but we
1813 // don't actually know the set of associated types right here so that's
1814 // handled in cleaning associated types
1815 let mut sized_params = FxHashSet();
1816 where_predicates.retain(|pred| {
1818 WP::BoundPredicate { ty: Generic(ref g), ref bounds } => {
1819 if bounds.iter().any(|b| b.is_sized_bound(cx)) {
1820 sized_params.insert(g.clone());
1830 // Run through the type parameters again and insert a ?Sized
1831 // unbound for any we didn't find to be Sized.
1832 for tp in &stripped_typarams {
1833 if !sized_params.contains(&tp.name) {
1834 where_predicates.push(WP::BoundPredicate {
1835 ty: Type::Generic(tp.name.clone()),
1836 bounds: vec![TyParamBound::maybe_sized(cx)],
1841 // It would be nice to collect all of the bounds on a type and recombine
1842 // them if possible, to avoid e.g. `where T: Foo, T: Bar, T: Sized, T: 'a`
1843 // and instead see `where T: Foo + Bar + Sized + 'a`
1846 params: gens.regions
1849 .map(|lp| GenericParam::Lifetime(lp))
1851 simplify::ty_params(stripped_typarams)
1853 .map(|tp| GenericParam::Type(tp))
1856 where_predicates: simplify::where_clauses(cx, where_predicates),
1861 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1863 pub generics: Generics,
1864 pub unsafety: hir::Unsafety,
1865 pub constness: hir::Constness,
1870 impl<'a> Clean<Method> for (&'a hir::MethodSig, &'a hir::Generics, hir::BodyId) {
1871 fn clean(&self, cx: &DocContext) -> Method {
1872 let generics = self.1.clean(cx);
1874 decl: enter_impl_trait(cx, &generics.params, || (&*self.0.decl, self.2).clean(cx)),
1876 unsafety: self.0.unsafety,
1877 constness: self.0.constness,
1883 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1884 pub struct TyMethod {
1885 pub unsafety: hir::Unsafety,
1887 pub generics: Generics,
1891 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
1892 pub struct Function {
1894 pub generics: Generics,
1895 pub unsafety: hir::Unsafety,
1896 pub constness: hir::Constness,
1900 impl Clean<Item> for doctree::Function {
1901 fn clean(&self, cx: &DocContext) -> Item {
1902 let generics = self.generics.clean(cx);
1903 let decl = enter_impl_trait(cx, &generics.params, || (&self.decl, self.body).clean(cx));
1905 name: Some(self.name.clean(cx)),
1906 attrs: self.attrs.clean(cx),
1907 source: self.whence.clean(cx),
1908 visibility: self.vis.clean(cx),
1909 stability: self.stab.clean(cx),
1910 deprecation: self.depr.clean(cx),
1911 def_id: cx.tcx.hir.local_def_id(self.id),
1912 inner: FunctionItem(Function {
1915 unsafety: self.unsafety,
1916 constness: self.constness,
1923 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1925 pub inputs: Arguments,
1926 pub output: FunctionRetTy,
1928 pub attrs: Attributes,
1932 pub fn has_self(&self) -> bool {
1933 self.inputs.values.len() > 0 && self.inputs.values[0].name == "self"
1936 pub fn self_type(&self) -> Option<SelfTy> {
1937 self.inputs.values.get(0).and_then(|v| v.to_self())
1941 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
1942 pub struct Arguments {
1943 pub values: Vec<Argument>,
1946 impl<'a> Clean<Arguments> for (&'a [P<hir::Ty>], &'a [Spanned<ast::Name>]) {
1947 fn clean(&self, cx: &DocContext) -> Arguments {
1949 values: self.0.iter().enumerate().map(|(i, ty)| {
1950 let mut name = self.1.get(i).map(|n| n.node.to_string())
1951 .unwrap_or(String::new());
1952 if name.is_empty() {
1953 name = "_".to_string();
1957 type_: ty.clean(cx),
1964 impl<'a> Clean<Arguments> for (&'a [P<hir::Ty>], hir::BodyId) {
1965 fn clean(&self, cx: &DocContext) -> Arguments {
1966 let body = cx.tcx.hir.body(self.1);
1969 values: self.0.iter().enumerate().map(|(i, ty)| {
1971 name: name_from_pat(&body.arguments[i].pat),
1972 type_: ty.clean(cx),
1979 impl<'a, A: Copy> Clean<FnDecl> for (&'a hir::FnDecl, A)
1980 where (&'a [P<hir::Ty>], A): Clean<Arguments>
1982 fn clean(&self, cx: &DocContext) -> FnDecl {
1984 inputs: (&self.0.inputs[..], self.1).clean(cx),
1985 output: self.0.output.clean(cx),
1986 variadic: self.0.variadic,
1987 attrs: Attributes::default()
1992 impl<'a, 'tcx> Clean<FnDecl> for (DefId, ty::PolyFnSig<'tcx>) {
1993 fn clean(&self, cx: &DocContext) -> FnDecl {
1994 let (did, sig) = *self;
1995 let mut names = if cx.tcx.hir.as_local_node_id(did).is_some() {
1998 cx.tcx.fn_arg_names(did).into_iter()
2002 output: Return(sig.skip_binder().output().clean(cx)),
2003 attrs: Attributes::default(),
2004 variadic: sig.skip_binder().variadic,
2006 values: sig.skip_binder().inputs().iter().map(|t| {
2009 name: names.next().map_or("".to_string(), |name| name.to_string()),
2017 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2018 pub struct Argument {
2023 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Debug)]
2026 SelfBorrowed(Option<Lifetime>, Mutability),
2031 pub fn to_self(&self) -> Option<SelfTy> {
2032 if self.name != "self" {
2035 if self.type_.is_self_type() {
2036 return Some(SelfValue);
2039 BorrowedRef{ref lifetime, mutability, ref type_} if type_.is_self_type() => {
2040 Some(SelfBorrowed(lifetime.clone(), mutability))
2042 _ => Some(SelfExplicit(self.type_.clone()))
2047 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2048 pub enum FunctionRetTy {
2053 impl Clean<FunctionRetTy> for hir::FunctionRetTy {
2054 fn clean(&self, cx: &DocContext) -> FunctionRetTy {
2056 hir::Return(ref typ) => Return(typ.clean(cx)),
2057 hir::DefaultReturn(..) => DefaultReturn,
2062 impl GetDefId for FunctionRetTy {
2063 fn def_id(&self) -> Option<DefId> {
2065 Return(ref ty) => ty.def_id(),
2066 DefaultReturn => None,
2071 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
2074 pub unsafety: hir::Unsafety,
2075 pub items: Vec<Item>,
2076 pub generics: Generics,
2077 pub bounds: Vec<TyParamBound>,
2078 pub is_spotlight: bool,
2082 impl Clean<Item> for doctree::Trait {
2083 fn clean(&self, cx: &DocContext) -> Item {
2084 let attrs = self.attrs.clean(cx);
2085 let is_spotlight = attrs.has_doc_flag("spotlight");
2087 name: Some(self.name.clean(cx)),
2089 source: self.whence.clean(cx),
2090 def_id: cx.tcx.hir.local_def_id(self.id),
2091 visibility: self.vis.clean(cx),
2092 stability: self.stab.clean(cx),
2093 deprecation: self.depr.clean(cx),
2094 inner: TraitItem(Trait {
2095 auto: self.is_auto.clean(cx),
2096 unsafety: self.unsafety,
2097 items: self.items.clean(cx),
2098 generics: self.generics.clean(cx),
2099 bounds: self.bounds.clean(cx),
2100 is_spotlight: is_spotlight,
2101 is_auto: self.is_auto.clean(cx),
2107 impl Clean<bool> for hir::IsAuto {
2108 fn clean(&self, _: &DocContext) -> bool {
2110 hir::IsAuto::Yes => true,
2111 hir::IsAuto::No => false,
2116 impl Clean<Type> for hir::TraitRef {
2117 fn clean(&self, cx: &DocContext) -> Type {
2118 resolve_type(cx, self.path.clean(cx), self.ref_id)
2122 impl Clean<PolyTrait> for hir::PolyTraitRef {
2123 fn clean(&self, cx: &DocContext) -> PolyTrait {
2125 trait_: self.trait_ref.clean(cx),
2126 generic_params: self.bound_generic_params.clean(cx)
2131 impl Clean<Item> for hir::TraitItem {
2132 fn clean(&self, cx: &DocContext) -> Item {
2133 let inner = match self.node {
2134 hir::TraitItemKind::Const(ref ty, default) => {
2135 AssociatedConstItem(ty.clean(cx),
2136 default.map(|e| print_const_expr(cx, e)))
2138 hir::TraitItemKind::Method(ref sig, hir::TraitMethod::Provided(body)) => {
2139 MethodItem((sig, &self.generics, body).clean(cx))
2141 hir::TraitItemKind::Method(ref sig, hir::TraitMethod::Required(ref names)) => {
2142 let generics = self.generics.clean(cx);
2143 TyMethodItem(TyMethod {
2144 unsafety: sig.unsafety.clone(),
2145 decl: enter_impl_trait(cx, &generics.params, || {
2146 (&*sig.decl, &names[..]).clean(cx)
2152 hir::TraitItemKind::Type(ref bounds, ref default) => {
2153 AssociatedTypeItem(bounds.clean(cx), default.clean(cx))
2157 name: Some(self.name.clean(cx)),
2158 attrs: self.attrs.clean(cx),
2159 source: self.span.clean(cx),
2160 def_id: cx.tcx.hir.local_def_id(self.id),
2162 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2163 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2169 impl Clean<Item> for hir::ImplItem {
2170 fn clean(&self, cx: &DocContext) -> Item {
2171 let inner = match self.node {
2172 hir::ImplItemKind::Const(ref ty, expr) => {
2173 AssociatedConstItem(ty.clean(cx),
2174 Some(print_const_expr(cx, expr)))
2176 hir::ImplItemKind::Method(ref sig, body) => {
2177 MethodItem((sig, &self.generics, body).clean(cx))
2179 hir::ImplItemKind::Type(ref ty) => TypedefItem(Typedef {
2180 type_: ty.clean(cx),
2181 generics: Generics::default(),
2185 name: Some(self.name.clean(cx)),
2186 source: self.span.clean(cx),
2187 attrs: self.attrs.clean(cx),
2188 def_id: cx.tcx.hir.local_def_id(self.id),
2189 visibility: self.vis.clean(cx),
2190 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2191 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2197 impl<'tcx> Clean<Item> for ty::AssociatedItem {
2198 fn clean(&self, cx: &DocContext) -> Item {
2199 let inner = match self.kind {
2200 ty::AssociatedKind::Const => {
2201 let ty = cx.tcx.type_of(self.def_id);
2202 let default = if self.defaultness.has_value() {
2203 Some(inline::print_inlined_const(cx, self.def_id))
2207 AssociatedConstItem(ty.clean(cx), default)
2209 ty::AssociatedKind::Method => {
2210 let generics = (cx.tcx.generics_of(self.def_id),
2211 &cx.tcx.predicates_of(self.def_id)).clean(cx);
2212 let sig = cx.tcx.fn_sig(self.def_id);
2213 let mut decl = (self.def_id, sig).clean(cx);
2215 if self.method_has_self_argument {
2216 let self_ty = match self.container {
2217 ty::ImplContainer(def_id) => {
2218 cx.tcx.type_of(def_id)
2220 ty::TraitContainer(_) => cx.tcx.mk_self_type()
2222 let self_arg_ty = *sig.input(0).skip_binder();
2223 if self_arg_ty == self_ty {
2224 decl.inputs.values[0].type_ = Generic(String::from("Self"));
2225 } else if let ty::TyRef(_, mt) = self_arg_ty.sty {
2226 if mt.ty == self_ty {
2227 match decl.inputs.values[0].type_ {
2228 BorrowedRef{ref mut type_, ..} => {
2229 **type_ = Generic(String::from("Self"))
2231 _ => unreachable!(),
2237 let provided = match self.container {
2238 ty::ImplContainer(_) => true,
2239 ty::TraitContainer(_) => self.defaultness.has_value()
2242 let constness = if cx.tcx.is_const_fn(self.def_id) {
2243 hir::Constness::Const
2245 hir::Constness::NotConst
2248 unsafety: sig.unsafety(),
2255 TyMethodItem(TyMethod {
2256 unsafety: sig.unsafety(),
2263 ty::AssociatedKind::Type => {
2264 let my_name = self.name.clean(cx);
2266 if let ty::TraitContainer(did) = self.container {
2267 // When loading a cross-crate associated type, the bounds for this type
2268 // are actually located on the trait/impl itself, so we need to load
2269 // all of the generics from there and then look for bounds that are
2270 // applied to this associated type in question.
2271 let predicates = cx.tcx.predicates_of(did);
2272 let generics = (cx.tcx.generics_of(did), &predicates).clean(cx);
2273 let mut bounds = generics.where_predicates.iter().filter_map(|pred| {
2274 let (name, self_type, trait_, bounds) = match *pred {
2275 WherePredicate::BoundPredicate {
2276 ty: QPath { ref name, ref self_type, ref trait_ },
2278 } => (name, self_type, trait_, bounds),
2281 if *name != my_name { return None }
2283 ResolvedPath { did, .. } if did == self.container.id() => {}
2287 Generic(ref s) if *s == "Self" => {}
2291 }).flat_map(|i| i.iter().cloned()).collect::<Vec<_>>();
2292 // Our Sized/?Sized bound didn't get handled when creating the generics
2293 // because we didn't actually get our whole set of bounds until just now
2294 // (some of them may have come from the trait). If we do have a sized
2295 // bound, we remove it, and if we don't then we add the `?Sized` bound
2297 match bounds.iter().position(|b| b.is_sized_bound(cx)) {
2298 Some(i) => { bounds.remove(i); }
2299 None => bounds.push(TyParamBound::maybe_sized(cx)),
2302 let ty = if self.defaultness.has_value() {
2303 Some(cx.tcx.type_of(self.def_id))
2308 AssociatedTypeItem(bounds, ty.clean(cx))
2310 TypedefItem(Typedef {
2311 type_: cx.tcx.type_of(self.def_id).clean(cx),
2312 generics: Generics {
2314 where_predicates: Vec::new(),
2321 let visibility = match self.container {
2322 ty::ImplContainer(_) => self.vis.clean(cx),
2323 ty::TraitContainer(_) => None,
2327 name: Some(self.name.clean(cx)),
2329 stability: get_stability(cx, self.def_id),
2330 deprecation: get_deprecation(cx, self.def_id),
2331 def_id: self.def_id,
2332 attrs: inline::load_attrs(cx, self.def_id),
2333 source: cx.tcx.def_span(self.def_id).clean(cx),
2339 /// A trait reference, which may have higher ranked lifetimes.
2340 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2341 pub struct PolyTrait {
2343 pub generic_params: Vec<GenericParam>,
2346 /// A representation of a Type suitable for hyperlinking purposes. Ideally one can get the original
2347 /// type out of the AST/TyCtxt given one of these, if more information is needed. Most importantly
2348 /// it does not preserve mutability or boxes.
2349 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
2351 /// structs/enums/traits (most that'd be an hir::TyPath)
2354 typarams: Option<Vec<TyParamBound>>,
2356 /// true if is a `T::Name` path for associated types
2359 /// For parameterized types, so the consumer of the JSON don't go
2360 /// looking for types which don't exist anywhere.
2362 /// Primitives are the fixed-size numeric types (plus int/usize/float), char,
2363 /// arrays, slices, and tuples.
2364 Primitive(PrimitiveType),
2366 BareFunction(Box<BareFunctionDecl>),
2369 Array(Box<Type>, String),
2372 RawPointer(Mutability, Box<Type>),
2374 lifetime: Option<Lifetime>,
2375 mutability: Mutability,
2379 // <Type as Trait>::Name
2382 self_type: Box<Type>,
2389 // impl TraitA+TraitB
2390 ImplTrait(Vec<TyParamBound>),
2393 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Hash, Copy, Debug)]
2394 pub enum PrimitiveType {
2395 Isize, I8, I16, I32, I64, I128,
2396 Usize, U8, U16, U32, U64, U128,
2411 #[derive(Clone, RustcEncodable, RustcDecodable, Copy, Debug)]
2427 pub trait GetDefId {
2428 fn def_id(&self) -> Option<DefId>;
2431 impl<T: GetDefId> GetDefId for Option<T> {
2432 fn def_id(&self) -> Option<DefId> {
2433 self.as_ref().and_then(|d| d.def_id())
2438 pub fn primitive_type(&self) -> Option<PrimitiveType> {
2440 Primitive(p) | BorrowedRef { type_: box Primitive(p), ..} => Some(p),
2441 Slice(..) | BorrowedRef { type_: box Slice(..), .. } => Some(PrimitiveType::Slice),
2442 Array(..) | BorrowedRef { type_: box Array(..), .. } => Some(PrimitiveType::Array),
2443 Tuple(ref tys) => if tys.is_empty() {
2444 Some(PrimitiveType::Unit)
2446 Some(PrimitiveType::Tuple)
2448 RawPointer(..) => Some(PrimitiveType::RawPointer),
2449 BorrowedRef { type_: box Generic(..), .. } => Some(PrimitiveType::Reference),
2450 BareFunction(..) => Some(PrimitiveType::Fn),
2451 Never => Some(PrimitiveType::Never),
2456 pub fn is_generic(&self) -> bool {
2458 ResolvedPath { is_generic, .. } => is_generic,
2463 pub fn is_self_type(&self) -> bool {
2465 Generic(ref name) => name == "Self",
2470 pub fn generics(&self) -> Option<&[Type]> {
2472 ResolvedPath { ref path, .. } => {
2473 path.segments.last().and_then(|seg| {
2474 if let PathParameters::AngleBracketed { ref types, .. } = seg.params {
2486 impl GetDefId for Type {
2487 fn def_id(&self) -> Option<DefId> {
2489 ResolvedPath { did, .. } => Some(did),
2490 Primitive(p) => ::html::render::cache().primitive_locations.get(&p).cloned(),
2491 BorrowedRef { type_: box Generic(..), .. } =>
2492 Primitive(PrimitiveType::Reference).def_id(),
2493 BorrowedRef { ref type_, .. } => type_.def_id(),
2494 Tuple(ref tys) => if tys.is_empty() {
2495 Primitive(PrimitiveType::Unit).def_id()
2497 Primitive(PrimitiveType::Tuple).def_id()
2499 BareFunction(..) => Primitive(PrimitiveType::Fn).def_id(),
2500 Never => Primitive(PrimitiveType::Never).def_id(),
2501 Slice(..) => Primitive(PrimitiveType::Slice).def_id(),
2502 Array(..) => Primitive(PrimitiveType::Array).def_id(),
2503 RawPointer(..) => Primitive(PrimitiveType::RawPointer).def_id(),
2504 QPath { ref self_type, .. } => self_type.def_id(),
2510 impl PrimitiveType {
2511 fn from_str(s: &str) -> Option<PrimitiveType> {
2513 "isize" => Some(PrimitiveType::Isize),
2514 "i8" => Some(PrimitiveType::I8),
2515 "i16" => Some(PrimitiveType::I16),
2516 "i32" => Some(PrimitiveType::I32),
2517 "i64" => Some(PrimitiveType::I64),
2518 "i128" => Some(PrimitiveType::I128),
2519 "usize" => Some(PrimitiveType::Usize),
2520 "u8" => Some(PrimitiveType::U8),
2521 "u16" => Some(PrimitiveType::U16),
2522 "u32" => Some(PrimitiveType::U32),
2523 "u64" => Some(PrimitiveType::U64),
2524 "u128" => Some(PrimitiveType::U128),
2525 "bool" => Some(PrimitiveType::Bool),
2526 "char" => Some(PrimitiveType::Char),
2527 "str" => Some(PrimitiveType::Str),
2528 "f32" => Some(PrimitiveType::F32),
2529 "f64" => Some(PrimitiveType::F64),
2530 "array" => Some(PrimitiveType::Array),
2531 "slice" => Some(PrimitiveType::Slice),
2532 "tuple" => Some(PrimitiveType::Tuple),
2533 "unit" => Some(PrimitiveType::Unit),
2534 "pointer" => Some(PrimitiveType::RawPointer),
2535 "reference" => Some(PrimitiveType::Reference),
2536 "fn" => Some(PrimitiveType::Fn),
2537 "never" => Some(PrimitiveType::Never),
2542 pub fn as_str(&self) -> &'static str {
2543 use self::PrimitiveType::*;
2566 RawPointer => "pointer",
2567 Reference => "reference",
2573 pub fn to_url_str(&self) -> &'static str {
2578 impl From<ast::IntTy> for PrimitiveType {
2579 fn from(int_ty: ast::IntTy) -> PrimitiveType {
2581 ast::IntTy::Isize => PrimitiveType::Isize,
2582 ast::IntTy::I8 => PrimitiveType::I8,
2583 ast::IntTy::I16 => PrimitiveType::I16,
2584 ast::IntTy::I32 => PrimitiveType::I32,
2585 ast::IntTy::I64 => PrimitiveType::I64,
2586 ast::IntTy::I128 => PrimitiveType::I128,
2591 impl From<ast::UintTy> for PrimitiveType {
2592 fn from(uint_ty: ast::UintTy) -> PrimitiveType {
2594 ast::UintTy::Usize => PrimitiveType::Usize,
2595 ast::UintTy::U8 => PrimitiveType::U8,
2596 ast::UintTy::U16 => PrimitiveType::U16,
2597 ast::UintTy::U32 => PrimitiveType::U32,
2598 ast::UintTy::U64 => PrimitiveType::U64,
2599 ast::UintTy::U128 => PrimitiveType::U128,
2604 impl From<ast::FloatTy> for PrimitiveType {
2605 fn from(float_ty: ast::FloatTy) -> PrimitiveType {
2607 ast::FloatTy::F32 => PrimitiveType::F32,
2608 ast::FloatTy::F64 => PrimitiveType::F64,
2613 impl Clean<Type> for hir::Ty {
2614 fn clean(&self, cx: &DocContext) -> Type {
2618 TyPtr(ref m) => RawPointer(m.mutbl.clean(cx), box m.ty.clean(cx)),
2619 TyRptr(ref l, ref m) => {
2620 let lifetime = if l.is_elided() {
2625 BorrowedRef {lifetime: lifetime, mutability: m.mutbl.clean(cx),
2626 type_: box m.ty.clean(cx)}
2628 TySlice(ref ty) => Slice(box ty.clean(cx)),
2629 TyArray(ref ty, n) => {
2630 let def_id = cx.tcx.hir.body_owner_def_id(n);
2631 let param_env = cx.tcx.param_env(def_id);
2632 let substs = Substs::identity_for_item(cx.tcx, def_id);
2633 let cid = GlobalId {
2634 instance: ty::Instance::new(def_id, substs),
2637 let n = cx.tcx.const_eval(param_env.and(cid)).unwrap_or_else(|_| {
2638 cx.tcx.mk_const(ty::Const {
2639 val: ConstVal::Unevaluated(def_id, substs),
2640 ty: cx.tcx.types.usize
2643 let n = print_const(cx, n);
2644 Array(box ty.clean(cx), n)
2646 TyTup(ref tys) => Tuple(tys.clean(cx)),
2647 TyPath(hir::QPath::Resolved(None, ref path)) => {
2648 if let Some(new_ty) = cx.ty_substs.borrow().get(&path.def).cloned() {
2652 if let Def::TyParam(did) = path.def {
2653 if let Some(bounds) = cx.impl_trait_bounds.borrow_mut().remove(&did) {
2654 return ImplTrait(bounds);
2658 let mut alias = None;
2659 if let Def::TyAlias(def_id) = path.def {
2660 // Substitute private type aliases
2661 if let Some(node_id) = cx.tcx.hir.as_local_node_id(def_id) {
2662 if !cx.access_levels.borrow().is_exported(def_id) {
2663 alias = Some(&cx.tcx.hir.expect_item(node_id).node);
2668 if let Some(&hir::ItemTy(ref ty, ref generics)) = alias {
2669 let provided_params = &path.segments.last().unwrap();
2670 let mut ty_substs = FxHashMap();
2671 let mut lt_substs = FxHashMap();
2672 provided_params.with_parameters(|provided_params| {
2673 for (i, ty_param) in generics.ty_params().enumerate() {
2674 let ty_param_def = Def::TyParam(cx.tcx.hir.local_def_id(ty_param.id));
2675 if let Some(ty) = provided_params.types.get(i).cloned() {
2676 ty_substs.insert(ty_param_def, ty.into_inner().clean(cx));
2677 } else if let Some(default) = ty_param.default.clone() {
2678 ty_substs.insert(ty_param_def, default.into_inner().clean(cx));
2682 for (i, lt_param) in generics.lifetimes().enumerate() {
2683 if let Some(lt) = provided_params.lifetimes.get(i).cloned() {
2684 if !lt.is_elided() {
2685 let lt_def_id = cx.tcx.hir.local_def_id(lt_param.lifetime.id);
2686 lt_substs.insert(lt_def_id, lt.clean(cx));
2691 return cx.enter_alias(ty_substs, lt_substs, || ty.clean(cx));
2693 resolve_type(cx, path.clean(cx), self.id)
2695 TyPath(hir::QPath::Resolved(Some(ref qself), ref p)) => {
2696 let mut segments: Vec<_> = p.segments.clone().into();
2698 let trait_path = hir::Path {
2700 def: Def::Trait(cx.tcx.associated_item(p.def.def_id()).container.id()),
2701 segments: segments.into(),
2704 name: p.segments.last().unwrap().name.clean(cx),
2705 self_type: box qself.clean(cx),
2706 trait_: box resolve_type(cx, trait_path.clean(cx), self.id)
2709 TyPath(hir::QPath::TypeRelative(ref qself, ref segment)) => {
2710 let mut def = Def::Err;
2711 let ty = hir_ty_to_ty(cx.tcx, self);
2712 if let ty::TyProjection(proj) = ty.sty {
2713 def = Def::Trait(proj.trait_ref(cx.tcx).def_id);
2715 let trait_path = hir::Path {
2718 segments: vec![].into(),
2721 name: segment.name.clean(cx),
2722 self_type: box qself.clean(cx),
2723 trait_: box resolve_type(cx, trait_path.clean(cx), self.id)
2726 TyTraitObject(ref bounds, ref lifetime) => {
2727 match bounds[0].clean(cx).trait_ {
2728 ResolvedPath { path, typarams: None, did, is_generic } => {
2729 let mut bounds: Vec<_> = bounds[1..].iter().map(|bound| {
2730 TraitBound(bound.clean(cx), hir::TraitBoundModifier::None)
2732 if !lifetime.is_elided() {
2733 bounds.push(RegionBound(lifetime.clean(cx)));
2737 typarams: Some(bounds),
2742 _ => Infer // shouldn't happen
2745 TyBareFn(ref barefn) => BareFunction(box barefn.clean(cx)),
2746 TyImplTraitExistential(ref exist_ty, ref _lts) => ImplTrait(exist_ty.bounds.clean(cx)),
2747 TyInfer | TyErr => Infer,
2748 TyTypeof(..) => panic!("Unimplemented type {:?}", self.node),
2753 impl<'tcx> Clean<Type> for Ty<'tcx> {
2754 fn clean(&self, cx: &DocContext) -> Type {
2756 ty::TyNever => Never,
2757 ty::TyBool => Primitive(PrimitiveType::Bool),
2758 ty::TyChar => Primitive(PrimitiveType::Char),
2759 ty::TyInt(int_ty) => Primitive(int_ty.into()),
2760 ty::TyUint(uint_ty) => Primitive(uint_ty.into()),
2761 ty::TyFloat(float_ty) => Primitive(float_ty.into()),
2762 ty::TyStr => Primitive(PrimitiveType::Str),
2763 ty::TySlice(ty) => Slice(box ty.clean(cx)),
2764 ty::TyArray(ty, n) => {
2765 let mut n = cx.tcx.lift(&n).unwrap();
2766 if let ConstVal::Unevaluated(def_id, substs) = n.val {
2767 let param_env = cx.tcx.param_env(def_id);
2768 let cid = GlobalId {
2769 instance: ty::Instance::new(def_id, substs),
2772 if let Ok(new_n) = cx.tcx.const_eval(param_env.and(cid)) {
2776 let n = print_const(cx, n);
2777 Array(box ty.clean(cx), n)
2779 ty::TyRawPtr(mt) => RawPointer(mt.mutbl.clean(cx), box mt.ty.clean(cx)),
2780 ty::TyRef(r, mt) => BorrowedRef {
2781 lifetime: r.clean(cx),
2782 mutability: mt.mutbl.clean(cx),
2783 type_: box mt.ty.clean(cx),
2787 let ty = cx.tcx.lift(self).unwrap();
2788 let sig = ty.fn_sig(cx.tcx);
2789 BareFunction(box BareFunctionDecl {
2790 unsafety: sig.unsafety(),
2791 generic_params: Vec::new(),
2792 decl: (cx.tcx.hir.local_def_id(ast::CRATE_NODE_ID), sig).clean(cx),
2796 ty::TyAdt(def, substs) => {
2798 let kind = match def.adt_kind() {
2799 AdtKind::Struct => TypeKind::Struct,
2800 AdtKind::Union => TypeKind::Union,
2801 AdtKind::Enum => TypeKind::Enum,
2803 inline::record_extern_fqn(cx, did, kind);
2804 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2805 None, false, vec![], substs);
2813 ty::TyForeign(did) => {
2814 inline::record_extern_fqn(cx, did, TypeKind::Foreign);
2815 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2816 None, false, vec![], Substs::empty());
2824 ty::TyDynamic(ref obj, ref reg) => {
2825 if let Some(principal) = obj.principal() {
2826 let did = principal.def_id();
2827 inline::record_extern_fqn(cx, did, TypeKind::Trait);
2829 let mut typarams = vec![];
2830 reg.clean(cx).map(|b| typarams.push(RegionBound(b)));
2831 for did in obj.auto_traits() {
2832 let empty = cx.tcx.intern_substs(&[]);
2833 let path = external_path(cx, &cx.tcx.item_name(did).as_str(),
2834 Some(did), false, vec![], empty);
2835 inline::record_extern_fqn(cx, did, TypeKind::Trait);
2836 let bound = TraitBound(PolyTrait {
2837 trait_: ResolvedPath {
2843 generic_params: Vec::new(),
2844 }, hir::TraitBoundModifier::None);
2845 typarams.push(bound);
2848 let mut bindings = vec![];
2849 for pb in obj.projection_bounds() {
2850 bindings.push(TypeBinding {
2851 name: cx.tcx.associated_item(pb.item_def_id()).name.clean(cx),
2852 ty: pb.skip_binder().ty.clean(cx)
2856 let path = external_path(cx, &cx.tcx.item_name(did).as_str(), Some(did),
2857 false, bindings, principal.skip_binder().substs);
2860 typarams: Some(typarams),
2868 ty::TyTuple(ref t) => Tuple(t.clean(cx)),
2870 ty::TyProjection(ref data) => data.clean(cx),
2872 ty::TyParam(ref p) => Generic(p.name.to_string()),
2874 ty::TyAnon(def_id, substs) => {
2875 // Grab the "TraitA + TraitB" from `impl TraitA + TraitB`,
2876 // by looking up the projections associated with the def_id.
2877 let predicates_of = cx.tcx.predicates_of(def_id);
2878 let substs = cx.tcx.lift(&substs).unwrap();
2879 let bounds = predicates_of.instantiate(cx.tcx, substs);
2880 let mut regions = vec![];
2881 let mut has_sized = false;
2882 let mut bounds = bounds.predicates.iter().filter_map(|predicate| {
2883 let trait_ref = if let Some(tr) = predicate.to_opt_poly_trait_ref() {
2885 } else if let ty::Predicate::TypeOutlives(pred) = *predicate {
2886 // these should turn up at the end
2887 pred.skip_binder().1.clean(cx).map(|r| regions.push(RegionBound(r)));
2893 if let Some(sized) = cx.tcx.lang_items().sized_trait() {
2894 if trait_ref.def_id() == sized {
2901 let bounds = bounds.predicates.iter().filter_map(|pred|
2902 if let ty::Predicate::Projection(proj) = *pred {
2903 let proj = proj.skip_binder();
2904 if proj.projection_ty.trait_ref(cx.tcx) == *trait_ref.skip_binder() {
2906 name: cx.tcx.associated_item(proj.projection_ty.item_def_id)
2908 ty: proj.ty.clean(cx),
2918 Some((trait_ref.skip_binder(), bounds).clean(cx))
2919 }).collect::<Vec<_>>();
2920 bounds.extend(regions);
2921 if !has_sized && !bounds.is_empty() {
2922 bounds.insert(0, TyParamBound::maybe_sized(cx));
2927 ty::TyClosure(..) | ty::TyGenerator(..) => Tuple(vec![]), // FIXME(pcwalton)
2929 ty::TyGeneratorWitness(..) => panic!("TyGeneratorWitness"),
2930 ty::TyInfer(..) => panic!("TyInfer"),
2931 ty::TyError => panic!("TyError"),
2936 impl Clean<Item> for hir::StructField {
2937 fn clean(&self, cx: &DocContext) -> Item {
2939 name: Some(self.name).clean(cx),
2940 attrs: self.attrs.clean(cx),
2941 source: self.span.clean(cx),
2942 visibility: self.vis.clean(cx),
2943 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
2944 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
2945 def_id: cx.tcx.hir.local_def_id(self.id),
2946 inner: StructFieldItem(self.ty.clean(cx)),
2951 impl<'tcx> Clean<Item> for ty::FieldDef {
2952 fn clean(&self, cx: &DocContext) -> Item {
2954 name: Some(self.name).clean(cx),
2955 attrs: cx.tcx.get_attrs(self.did).clean(cx),
2956 source: cx.tcx.def_span(self.did).clean(cx),
2957 visibility: self.vis.clean(cx),
2958 stability: get_stability(cx, self.did),
2959 deprecation: get_deprecation(cx, self.did),
2961 inner: StructFieldItem(cx.tcx.type_of(self.did).clean(cx)),
2966 #[derive(Clone, PartialEq, Eq, RustcDecodable, RustcEncodable, Debug)]
2967 pub enum Visibility {
2972 impl Clean<Option<Visibility>> for hir::Visibility {
2973 fn clean(&self, _: &DocContext) -> Option<Visibility> {
2974 Some(if *self == hir::Visibility::Public { Public } else { Inherited })
2978 impl Clean<Option<Visibility>> for ty::Visibility {
2979 fn clean(&self, _: &DocContext) -> Option<Visibility> {
2980 Some(if *self == ty::Visibility::Public { Public } else { Inherited })
2984 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
2986 pub struct_type: doctree::StructType,
2987 pub generics: Generics,
2988 pub fields: Vec<Item>,
2989 pub fields_stripped: bool,
2992 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
2994 pub struct_type: doctree::StructType,
2995 pub generics: Generics,
2996 pub fields: Vec<Item>,
2997 pub fields_stripped: bool,
3000 impl Clean<Vec<Item>> for doctree::Struct {
3001 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3002 let name = self.name.clean(cx);
3003 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3007 attrs: self.attrs.clean(cx),
3008 source: self.whence.clean(cx),
3009 def_id: cx.tcx.hir.local_def_id(self.id),
3010 visibility: self.vis.clean(cx),
3011 stability: self.stab.clean(cx),
3012 deprecation: self.depr.clean(cx),
3013 inner: StructItem(Struct {
3014 struct_type: self.struct_type,
3015 generics: self.generics.clean(cx),
3016 fields: self.fields.clean(cx),
3017 fields_stripped: false,
3025 impl Clean<Vec<Item>> for doctree::Union {
3026 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3027 let name = self.name.clean(cx);
3028 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3032 attrs: self.attrs.clean(cx),
3033 source: self.whence.clean(cx),
3034 def_id: cx.tcx.hir.local_def_id(self.id),
3035 visibility: self.vis.clean(cx),
3036 stability: self.stab.clean(cx),
3037 deprecation: self.depr.clean(cx),
3038 inner: UnionItem(Union {
3039 struct_type: self.struct_type,
3040 generics: self.generics.clean(cx),
3041 fields: self.fields.clean(cx),
3042 fields_stripped: false,
3050 /// This is a more limited form of the standard Struct, different in that
3051 /// it lacks the things most items have (name, id, parameterization). Found
3052 /// only as a variant in an enum.
3053 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3054 pub struct VariantStruct {
3055 pub struct_type: doctree::StructType,
3056 pub fields: Vec<Item>,
3057 pub fields_stripped: bool,
3060 impl Clean<VariantStruct> for ::rustc::hir::VariantData {
3061 fn clean(&self, cx: &DocContext) -> VariantStruct {
3063 struct_type: doctree::struct_type_from_def(self),
3064 fields: self.fields().iter().map(|x| x.clean(cx)).collect(),
3065 fields_stripped: false,
3070 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3072 pub variants: Vec<Item>,
3073 pub generics: Generics,
3074 pub variants_stripped: bool,
3077 impl Clean<Vec<Item>> for doctree::Enum {
3078 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3079 let name = self.name.clean(cx);
3080 let mut ret = get_auto_traits_with_node_id(cx, self.id, name.clone());
3084 attrs: self.attrs.clean(cx),
3085 source: self.whence.clean(cx),
3086 def_id: cx.tcx.hir.local_def_id(self.id),
3087 visibility: self.vis.clean(cx),
3088 stability: self.stab.clean(cx),
3089 deprecation: self.depr.clean(cx),
3090 inner: EnumItem(Enum {
3091 variants: self.variants.clean(cx),
3092 generics: self.generics.clean(cx),
3093 variants_stripped: false,
3101 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3102 pub struct Variant {
3103 pub kind: VariantKind,
3106 impl Clean<Item> for doctree::Variant {
3107 fn clean(&self, cx: &DocContext) -> Item {
3109 name: Some(self.name.clean(cx)),
3110 attrs: self.attrs.clean(cx),
3111 source: self.whence.clean(cx),
3113 stability: self.stab.clean(cx),
3114 deprecation: self.depr.clean(cx),
3115 def_id: cx.tcx.hir.local_def_id(self.def.id()),
3116 inner: VariantItem(Variant {
3117 kind: self.def.clean(cx),
3123 impl<'tcx> Clean<Item> for ty::VariantDef {
3124 fn clean(&self, cx: &DocContext) -> Item {
3125 let kind = match self.ctor_kind {
3126 CtorKind::Const => VariantKind::CLike,
3129 self.fields.iter().map(|f| cx.tcx.type_of(f.did).clean(cx)).collect()
3132 CtorKind::Fictive => {
3133 VariantKind::Struct(VariantStruct {
3134 struct_type: doctree::Plain,
3135 fields_stripped: false,
3136 fields: self.fields.iter().map(|field| {
3138 source: cx.tcx.def_span(field.did).clean(cx),
3139 name: Some(field.name.clean(cx)),
3140 attrs: cx.tcx.get_attrs(field.did).clean(cx),
3141 visibility: field.vis.clean(cx),
3143 stability: get_stability(cx, field.did),
3144 deprecation: get_deprecation(cx, field.did),
3145 inner: StructFieldItem(cx.tcx.type_of(field.did).clean(cx))
3152 name: Some(self.name.clean(cx)),
3153 attrs: inline::load_attrs(cx, self.did),
3154 source: cx.tcx.def_span(self.did).clean(cx),
3155 visibility: Some(Inherited),
3157 inner: VariantItem(Variant { kind: kind }),
3158 stability: get_stability(cx, self.did),
3159 deprecation: get_deprecation(cx, self.did),
3164 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3165 pub enum VariantKind {
3168 Struct(VariantStruct),
3171 impl Clean<VariantKind> for hir::VariantData {
3172 fn clean(&self, cx: &DocContext) -> VariantKind {
3173 if self.is_struct() {
3174 VariantKind::Struct(self.clean(cx))
3175 } else if self.is_unit() {
3178 VariantKind::Tuple(self.fields().iter().map(|x| x.ty.clean(cx)).collect())
3183 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3185 pub filename: FileName,
3193 pub fn empty() -> Span {
3195 filename: FileName::Anon,
3196 loline: 0, locol: 0,
3197 hiline: 0, hicol: 0,
3202 impl Clean<Span> for syntax_pos::Span {
3203 fn clean(&self, cx: &DocContext) -> Span {
3204 if *self == DUMMY_SP {
3205 return Span::empty();
3208 let cm = cx.sess().codemap();
3209 let filename = cm.span_to_filename(*self);
3210 let lo = cm.lookup_char_pos(self.lo());
3211 let hi = cm.lookup_char_pos(self.hi());
3215 locol: lo.col.to_usize(),
3217 hicol: hi.col.to_usize(),
3222 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3226 pub segments: Vec<PathSegment>,
3230 pub fn singleton(name: String) -> Path {
3234 segments: vec![PathSegment {
3236 params: PathParameters::AngleBracketed {
3237 lifetimes: Vec::new(),
3239 bindings: Vec::new(),
3245 pub fn last_name(&self) -> &str {
3246 self.segments.last().unwrap().name.as_str()
3250 impl Clean<Path> for hir::Path {
3251 fn clean(&self, cx: &DocContext) -> Path {
3253 global: self.is_global(),
3255 segments: if self.is_global() { &self.segments[1..] } else { &self.segments }.clean(cx),
3260 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3261 pub enum PathParameters {
3263 lifetimes: Vec<Lifetime>,
3265 bindings: Vec<TypeBinding>,
3269 output: Option<Type>,
3273 impl Clean<PathParameters> for hir::PathParameters {
3274 fn clean(&self, cx: &DocContext) -> PathParameters {
3275 if self.parenthesized {
3276 let output = self.bindings[0].ty.clean(cx);
3277 PathParameters::Parenthesized {
3278 inputs: self.inputs().clean(cx),
3279 output: if output != Type::Tuple(Vec::new()) { Some(output) } else { None }
3282 PathParameters::AngleBracketed {
3283 lifetimes: if self.lifetimes.iter().all(|lt| lt.is_elided()) {
3286 self.lifetimes.clean(cx)
3288 types: self.types.clean(cx),
3289 bindings: self.bindings.clean(cx),
3295 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3296 pub struct PathSegment {
3298 pub params: PathParameters,
3301 impl Clean<PathSegment> for hir::PathSegment {
3302 fn clean(&self, cx: &DocContext) -> PathSegment {
3304 name: self.name.clean(cx),
3305 params: self.with_parameters(|parameters| parameters.clean(cx))
3310 fn strip_type(ty: Type) -> Type {
3312 Type::ResolvedPath { path, typarams, did, is_generic } => {
3313 Type::ResolvedPath { path: strip_path(&path), typarams, did, is_generic }
3315 Type::Tuple(inner_tys) => {
3316 Type::Tuple(inner_tys.iter().map(|t| strip_type(t.clone())).collect())
3318 Type::Slice(inner_ty) => Type::Slice(Box::new(strip_type(*inner_ty))),
3319 Type::Array(inner_ty, s) => Type::Array(Box::new(strip_type(*inner_ty)), s),
3320 Type::Unique(inner_ty) => Type::Unique(Box::new(strip_type(*inner_ty))),
3321 Type::RawPointer(m, inner_ty) => Type::RawPointer(m, Box::new(strip_type(*inner_ty))),
3322 Type::BorrowedRef { lifetime, mutability, type_ } => {
3323 Type::BorrowedRef { lifetime, mutability, type_: Box::new(strip_type(*type_)) }
3325 Type::QPath { name, self_type, trait_ } => {
3328 self_type: Box::new(strip_type(*self_type)), trait_: Box::new(strip_type(*trait_))
3335 fn strip_path(path: &Path) -> Path {
3336 let segments = path.segments.iter().map(|s| {
3338 name: s.name.clone(),
3339 params: PathParameters::AngleBracketed {
3340 lifetimes: Vec::new(),
3342 bindings: Vec::new(),
3348 global: path.global,
3349 def: path.def.clone(),
3354 fn qpath_to_string(p: &hir::QPath) -> String {
3355 let segments = match *p {
3356 hir::QPath::Resolved(_, ref path) => &path.segments,
3357 hir::QPath::TypeRelative(_, ref segment) => return segment.name.to_string(),
3360 let mut s = String::new();
3361 for (i, seg) in segments.iter().enumerate() {
3365 if seg.name != keywords::CrateRoot.name() {
3366 s.push_str(&*seg.name.as_str());
3372 impl Clean<String> for ast::Name {
3373 fn clean(&self, _: &DocContext) -> String {
3378 impl Clean<String> for InternedString {
3379 fn clean(&self, _: &DocContext) -> String {
3384 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3385 pub struct Typedef {
3387 pub generics: Generics,
3390 impl Clean<Item> for doctree::Typedef {
3391 fn clean(&self, cx: &DocContext) -> Item {
3393 name: Some(self.name.clean(cx)),
3394 attrs: self.attrs.clean(cx),
3395 source: self.whence.clean(cx),
3396 def_id: cx.tcx.hir.local_def_id(self.id.clone()),
3397 visibility: self.vis.clean(cx),
3398 stability: self.stab.clean(cx),
3399 deprecation: self.depr.clean(cx),
3400 inner: TypedefItem(Typedef {
3401 type_: self.ty.clean(cx),
3402 generics: self.gen.clean(cx),
3408 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Debug, Hash)]
3409 pub struct BareFunctionDecl {
3410 pub unsafety: hir::Unsafety,
3411 pub generic_params: Vec<GenericParam>,
3416 impl Clean<BareFunctionDecl> for hir::BareFnTy {
3417 fn clean(&self, cx: &DocContext) -> BareFunctionDecl {
3418 let generic_params = self.generic_params.clean(cx);
3420 unsafety: self.unsafety,
3421 decl: enter_impl_trait(cx, &generic_params, || {
3422 (&*self.decl, &self.arg_names[..]).clean(cx)
3430 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3433 pub mutability: Mutability,
3434 /// It's useful to have the value of a static documented, but I have no
3435 /// desire to represent expressions (that'd basically be all of the AST,
3436 /// which is huge!). So, have a string.
3440 impl Clean<Item> for doctree::Static {
3441 fn clean(&self, cx: &DocContext) -> Item {
3442 debug!("cleaning static {}: {:?}", self.name.clean(cx), self);
3444 name: Some(self.name.clean(cx)),
3445 attrs: self.attrs.clean(cx),
3446 source: self.whence.clean(cx),
3447 def_id: cx.tcx.hir.local_def_id(self.id),
3448 visibility: self.vis.clean(cx),
3449 stability: self.stab.clean(cx),
3450 deprecation: self.depr.clean(cx),
3451 inner: StaticItem(Static {
3452 type_: self.type_.clean(cx),
3453 mutability: self.mutability.clean(cx),
3454 expr: print_const_expr(cx, self.expr),
3460 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3461 pub struct Constant {
3466 impl Clean<Item> for doctree::Constant {
3467 fn clean(&self, cx: &DocContext) -> Item {
3469 name: Some(self.name.clean(cx)),
3470 attrs: self.attrs.clean(cx),
3471 source: self.whence.clean(cx),
3472 def_id: cx.tcx.hir.local_def_id(self.id),
3473 visibility: self.vis.clean(cx),
3474 stability: self.stab.clean(cx),
3475 deprecation: self.depr.clean(cx),
3476 inner: ConstantItem(Constant {
3477 type_: self.type_.clean(cx),
3478 expr: print_const_expr(cx, self.expr),
3484 #[derive(Debug, Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Copy, Hash)]
3485 pub enum Mutability {
3490 impl Clean<Mutability> for hir::Mutability {
3491 fn clean(&self, _: &DocContext) -> Mutability {
3493 &hir::MutMutable => Mutable,
3494 &hir::MutImmutable => Immutable,
3499 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Eq, Copy, Debug, Hash)]
3500 pub enum ImplPolarity {
3505 impl Clean<ImplPolarity> for hir::ImplPolarity {
3506 fn clean(&self, _: &DocContext) -> ImplPolarity {
3508 &hir::ImplPolarity::Positive => ImplPolarity::Positive,
3509 &hir::ImplPolarity::Negative => ImplPolarity::Negative,
3514 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3516 pub unsafety: hir::Unsafety,
3517 pub generics: Generics,
3518 pub provided_trait_methods: FxHashSet<String>,
3519 pub trait_: Option<Type>,
3521 pub items: Vec<Item>,
3522 pub polarity: Option<ImplPolarity>,
3523 pub synthetic: bool,
3526 pub fn get_auto_traits_with_node_id(cx: &DocContext, id: ast::NodeId, name: String) -> Vec<Item> {
3527 let finder = AutoTraitFinder { cx };
3528 finder.get_with_node_id(id, name)
3531 pub fn get_auto_traits_with_def_id(cx: &DocContext, id: DefId) -> Vec<Item> {
3532 let finder = AutoTraitFinder {
3536 finder.get_with_def_id(id)
3539 impl Clean<Vec<Item>> for doctree::Impl {
3540 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3541 let mut ret = Vec::new();
3542 let trait_ = self.trait_.clean(cx);
3543 let items = self.items.clean(cx);
3545 // If this impl block is an implementation of the Deref trait, then we
3546 // need to try inlining the target's inherent impl blocks as well.
3547 if trait_.def_id() == cx.tcx.lang_items().deref_trait() {
3548 build_deref_target_impls(cx, &items, &mut ret);
3551 let provided = trait_.def_id().map(|did| {
3552 cx.tcx.provided_trait_methods(did)
3554 .map(|meth| meth.name.to_string())
3556 }).unwrap_or(FxHashSet());
3560 attrs: self.attrs.clean(cx),
3561 source: self.whence.clean(cx),
3562 def_id: cx.tcx.hir.local_def_id(self.id),
3563 visibility: self.vis.clean(cx),
3564 stability: self.stab.clean(cx),
3565 deprecation: self.depr.clean(cx),
3566 inner: ImplItem(Impl {
3567 unsafety: self.unsafety,
3568 generics: self.generics.clean(cx),
3569 provided_trait_methods: provided,
3571 for_: self.for_.clean(cx),
3573 polarity: Some(self.polarity.clean(cx)),
3581 fn build_deref_target_impls(cx: &DocContext,
3583 ret: &mut Vec<Item>) {
3584 use self::PrimitiveType::*;
3588 let target = match item.inner {
3589 TypedefItem(ref t, true) => &t.type_,
3592 let primitive = match *target {
3593 ResolvedPath { did, .. } if did.is_local() => continue,
3594 ResolvedPath { did, .. } => {
3595 // We set the last parameter to false to avoid looking for auto-impls for traits
3596 // and therefore avoid an ICE.
3597 // The reason behind this is that auto-traits don't propagate through Deref so
3598 // we're not supposed to synthesise impls for them.
3599 ret.extend(inline::build_impls(cx, did, false));
3602 _ => match target.primitive_type() {
3607 let did = match primitive {
3608 Isize => tcx.lang_items().isize_impl(),
3609 I8 => tcx.lang_items().i8_impl(),
3610 I16 => tcx.lang_items().i16_impl(),
3611 I32 => tcx.lang_items().i32_impl(),
3612 I64 => tcx.lang_items().i64_impl(),
3613 I128 => tcx.lang_items().i128_impl(),
3614 Usize => tcx.lang_items().usize_impl(),
3615 U8 => tcx.lang_items().u8_impl(),
3616 U16 => tcx.lang_items().u16_impl(),
3617 U32 => tcx.lang_items().u32_impl(),
3618 U64 => tcx.lang_items().u64_impl(),
3619 U128 => tcx.lang_items().u128_impl(),
3620 F32 => tcx.lang_items().f32_impl(),
3621 F64 => tcx.lang_items().f64_impl(),
3622 Char => tcx.lang_items().char_impl(),
3624 Str => tcx.lang_items().str_impl(),
3625 Slice => tcx.lang_items().slice_impl(),
3626 Array => tcx.lang_items().slice_impl(),
3629 RawPointer => tcx.lang_items().const_ptr_impl(),
3634 if let Some(did) = did {
3635 if !did.is_local() {
3636 inline::build_impl(cx, did, ret);
3642 impl Clean<Item> for doctree::ExternCrate {
3643 fn clean(&self, cx: &DocContext) -> Item {
3646 attrs: self.attrs.clean(cx),
3647 source: self.whence.clean(cx),
3648 def_id: DefId { krate: self.cnum, index: CRATE_DEF_INDEX },
3649 visibility: self.vis.clean(cx),
3652 inner: ExternCrateItem(self.name.clean(cx), self.path.clone())
3657 impl Clean<Vec<Item>> for doctree::Import {
3658 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3659 // We consider inlining the documentation of `pub use` statements, but we
3660 // forcefully don't inline if this is not public or if the
3661 // #[doc(no_inline)] attribute is present.
3662 // Don't inline doc(hidden) imports so they can be stripped at a later stage.
3663 let denied = self.vis != hir::Public || self.attrs.iter().any(|a| {
3664 a.name() == "doc" && match a.meta_item_list() {
3665 Some(l) => attr::list_contains_name(&l, "no_inline") ||
3666 attr::list_contains_name(&l, "hidden"),
3670 let path = self.path.clean(cx);
3671 let inner = if self.glob {
3672 Import::Glob(resolve_use_source(cx, path))
3674 let name = self.name;
3676 if let Some(items) = inline::try_inline(cx, path.def, name) {
3680 Import::Simple(name.clean(cx), resolve_use_source(cx, path))
3684 attrs: self.attrs.clean(cx),
3685 source: self.whence.clean(cx),
3686 def_id: cx.tcx.hir.local_def_id(ast::CRATE_NODE_ID),
3687 visibility: self.vis.clean(cx),
3690 inner: ImportItem(inner)
3695 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3697 // use source as str;
3698 Simple(String, ImportSource),
3703 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3704 pub struct ImportSource {
3706 pub did: Option<DefId>,
3709 impl Clean<Vec<Item>> for hir::ForeignMod {
3710 fn clean(&self, cx: &DocContext) -> Vec<Item> {
3711 let mut items = self.items.clean(cx);
3712 for item in &mut items {
3713 if let ForeignFunctionItem(ref mut f) = item.inner {
3721 impl Clean<Item> for hir::ForeignItem {
3722 fn clean(&self, cx: &DocContext) -> Item {
3723 let inner = match self.node {
3724 hir::ForeignItemFn(ref decl, ref names, ref generics) => {
3725 let generics = generics.clean(cx);
3726 ForeignFunctionItem(Function {
3727 decl: enter_impl_trait(cx, &generics.params, || {
3728 (&**decl, &names[..]).clean(cx)
3731 unsafety: hir::Unsafety::Unsafe,
3733 constness: hir::Constness::NotConst,
3736 hir::ForeignItemStatic(ref ty, mutbl) => {
3737 ForeignStaticItem(Static {
3738 type_: ty.clean(cx),
3739 mutability: if mutbl {Mutable} else {Immutable},
3740 expr: "".to_string(),
3743 hir::ForeignItemType => {
3748 name: Some(self.name.clean(cx)),
3749 attrs: self.attrs.clean(cx),
3750 source: self.span.clean(cx),
3751 def_id: cx.tcx.hir.local_def_id(self.id),
3752 visibility: self.vis.clean(cx),
3753 stability: get_stability(cx, cx.tcx.hir.local_def_id(self.id)),
3754 deprecation: get_deprecation(cx, cx.tcx.hir.local_def_id(self.id)),
3763 fn to_src(&self, cx: &DocContext) -> String;
3766 impl ToSource for syntax_pos::Span {
3767 fn to_src(&self, cx: &DocContext) -> String {
3768 debug!("converting span {:?} to snippet", self.clean(cx));
3769 let sn = match cx.sess().codemap().span_to_snippet(*self) {
3770 Ok(x) => x.to_string(),
3771 Err(_) => "".to_string()
3773 debug!("got snippet {}", sn);
3778 fn name_from_pat(p: &hir::Pat) -> String {
3780 debug!("Trying to get a name from pattern: {:?}", p);
3783 PatKind::Wild => "_".to_string(),
3784 PatKind::Binding(_, _, ref p, _) => p.node.to_string(),
3785 PatKind::TupleStruct(ref p, ..) | PatKind::Path(ref p) => qpath_to_string(p),
3786 PatKind::Struct(ref name, ref fields, etc) => {
3787 format!("{} {{ {}{} }}", qpath_to_string(name),
3788 fields.iter().map(|&Spanned { node: ref fp, .. }|
3789 format!("{}: {}", fp.name, name_from_pat(&*fp.pat)))
3790 .collect::<Vec<String>>().join(", "),
3791 if etc { ", ..." } else { "" }
3794 PatKind::Tuple(ref elts, _) => format!("({})", elts.iter().map(|p| name_from_pat(&**p))
3795 .collect::<Vec<String>>().join(", ")),
3796 PatKind::Box(ref p) => name_from_pat(&**p),
3797 PatKind::Ref(ref p, _) => name_from_pat(&**p),
3798 PatKind::Lit(..) => {
3799 warn!("tried to get argument name from PatKind::Lit, \
3800 which is silly in function arguments");
3803 PatKind::Range(..) => panic!("tried to get argument name from PatKind::Range, \
3804 which is not allowed in function arguments"),
3805 PatKind::Slice(ref begin, ref mid, ref end) => {
3806 let begin = begin.iter().map(|p| name_from_pat(&**p));
3807 let mid = mid.as_ref().map(|p| format!("..{}", name_from_pat(&**p))).into_iter();
3808 let end = end.iter().map(|p| name_from_pat(&**p));
3809 format!("[{}]", begin.chain(mid).chain(end).collect::<Vec<_>>().join(", "))
3814 fn print_const(cx: &DocContext, n: &ty::Const) -> String {
3816 ConstVal::Unevaluated(def_id, _) => {
3817 if let Some(node_id) = cx.tcx.hir.as_local_node_id(def_id) {
3818 print_const_expr(cx, cx.tcx.hir.body_owned_by(node_id))
3820 inline::print_inlined_const(cx, def_id)
3823 ConstVal::Value(val) => {
3824 let mut s = String::new();
3825 ::rustc::mir::print_miri_value(val, n.ty, &mut s).unwrap();
3826 // array lengths are obviously usize
3827 if s.ends_with("usize") {
3828 let n = s.len() - "usize".len();
3836 fn print_const_expr(cx: &DocContext, body: hir::BodyId) -> String {
3837 cx.tcx.hir.node_to_pretty_string(body.node_id)
3840 /// Given a type Path, resolve it to a Type using the TyCtxt
3841 fn resolve_type(cx: &DocContext,
3843 id: ast::NodeId) -> Type {
3844 if id == ast::DUMMY_NODE_ID {
3845 debug!("resolve_type({:?})", path);
3847 debug!("resolve_type({:?},{:?})", path, id);
3850 let is_generic = match path.def {
3851 Def::PrimTy(p) => match p {
3852 hir::TyStr => return Primitive(PrimitiveType::Str),
3853 hir::TyBool => return Primitive(PrimitiveType::Bool),
3854 hir::TyChar => return Primitive(PrimitiveType::Char),
3855 hir::TyInt(int_ty) => return Primitive(int_ty.into()),
3856 hir::TyUint(uint_ty) => return Primitive(uint_ty.into()),
3857 hir::TyFloat(float_ty) => return Primitive(float_ty.into()),
3859 Def::SelfTy(..) if path.segments.len() == 1 => {
3860 return Generic(keywords::SelfType.name().to_string());
3862 Def::TyParam(..) if path.segments.len() == 1 => {
3863 return Generic(format!("{:#}", path));
3865 Def::SelfTy(..) | Def::TyParam(..) | Def::AssociatedTy(..) => true,
3868 let did = register_def(&*cx, path.def);
3869 ResolvedPath { path: path, typarams: None, did: did, is_generic: is_generic }
3872 fn register_def(cx: &DocContext, def: Def) -> DefId {
3873 debug!("register_def({:?})", def);
3875 let (did, kind) = match def {
3876 Def::Fn(i) => (i, TypeKind::Function),
3877 Def::TyAlias(i) => (i, TypeKind::Typedef),
3878 Def::Enum(i) => (i, TypeKind::Enum),
3879 Def::Trait(i) => (i, TypeKind::Trait),
3880 Def::Struct(i) => (i, TypeKind::Struct),
3881 Def::Union(i) => (i, TypeKind::Union),
3882 Def::Mod(i) => (i, TypeKind::Module),
3883 Def::TyForeign(i) => (i, TypeKind::Foreign),
3884 Def::Const(i) => (i, TypeKind::Const),
3885 Def::Static(i, _) => (i, TypeKind::Static),
3886 Def::Variant(i) => (cx.tcx.parent_def_id(i).unwrap(), TypeKind::Enum),
3887 Def::Macro(i, _) => (i, TypeKind::Macro),
3888 Def::SelfTy(Some(def_id), _) => (def_id, TypeKind::Trait),
3889 Def::SelfTy(_, Some(impl_def_id)) => {
3892 _ => return def.def_id()
3894 if did.is_local() { return did }
3895 inline::record_extern_fqn(cx, did, kind);
3896 if let TypeKind::Trait = kind {
3897 inline::record_extern_trait(cx, did);
3902 fn resolve_use_source(cx: &DocContext, path: Path) -> ImportSource {
3904 did: if path.def == Def::Err {
3907 Some(register_def(cx, path.def))
3913 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3916 pub imported_from: Option<String>,
3919 impl Clean<Item> for doctree::Macro {
3920 fn clean(&self, cx: &DocContext) -> Item {
3921 let name = self.name.clean(cx);
3923 name: Some(name.clone()),
3924 attrs: self.attrs.clean(cx),
3925 source: self.whence.clean(cx),
3926 visibility: Some(Public),
3927 stability: self.stab.clean(cx),
3928 deprecation: self.depr.clean(cx),
3929 def_id: self.def_id,
3930 inner: MacroItem(Macro {
3931 source: format!("macro_rules! {} {{\n{}}}",
3933 self.matchers.iter().map(|span| {
3934 format!(" {} => {{ ... }};\n", span.to_src(cx))
3935 }).collect::<String>()),
3936 imported_from: self.imported_from.clean(cx),
3942 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3943 pub struct Stability {
3944 pub level: stability::StabilityLevel,
3945 pub feature: String,
3947 pub deprecated_since: String,
3948 pub deprecated_reason: String,
3949 pub unstable_reason: String,
3950 pub issue: Option<u32>
3953 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
3954 pub struct Deprecation {
3959 impl Clean<Stability> for attr::Stability {
3960 fn clean(&self, _: &DocContext) -> Stability {
3962 level: stability::StabilityLevel::from_attr_level(&self.level),
3963 feature: self.feature.to_string(),
3964 since: match self.level {
3965 attr::Stable {ref since} => since.to_string(),
3966 _ => "".to_string(),
3968 deprecated_since: match self.rustc_depr {
3969 Some(attr::RustcDeprecation {ref since, ..}) => since.to_string(),
3972 deprecated_reason: match self.rustc_depr {
3973 Some(ref depr) => depr.reason.to_string(),
3974 _ => "".to_string(),
3976 unstable_reason: match self.level {
3977 attr::Unstable { reason: Some(ref reason), .. } => reason.to_string(),
3978 _ => "".to_string(),
3980 issue: match self.level {
3981 attr::Unstable {issue, ..} => Some(issue),
3988 impl<'a> Clean<Stability> for &'a attr::Stability {
3989 fn clean(&self, dc: &DocContext) -> Stability {
3994 impl Clean<Deprecation> for attr::Deprecation {
3995 fn clean(&self, _: &DocContext) -> Deprecation {
3997 since: self.since.as_ref().map_or("".to_string(), |s| s.to_string()),
3998 note: self.note.as_ref().map_or("".to_string(), |s| s.to_string()),
4003 /// An equality constraint on an associated type, e.g. `A=Bar` in `Foo<A=Bar>`
4004 #[derive(Clone, PartialEq, Eq, RustcDecodable, RustcEncodable, Debug, Hash)]
4005 pub struct TypeBinding {
4010 impl Clean<TypeBinding> for hir::TypeBinding {
4011 fn clean(&self, cx: &DocContext) -> TypeBinding {
4013 name: self.name.clean(cx),
4014 ty: self.ty.clean(cx)
4019 pub fn def_id_to_path(cx: &DocContext, did: DefId, name: Option<String>) -> Vec<String> {
4020 let crate_name = name.unwrap_or_else(|| cx.tcx.crate_name(did.krate).to_string());
4021 let relative = cx.tcx.def_path(did).data.into_iter().filter_map(|elem| {
4022 // extern blocks have an empty name
4023 let s = elem.data.to_string();
4030 once(crate_name).chain(relative).collect()
4033 pub fn enter_impl_trait<F, R>(cx: &DocContext, gps: &[GenericParam], f: F) -> R
4037 let bounds = gps.iter()
4039 if let GenericParam::Type(ref tp) = *p {
4040 if tp.synthetic == Some(hir::SyntheticTyParamKind::ImplTrait) {
4041 return Some((tp.did, tp.bounds.clone()));
4047 .collect::<FxHashMap<DefId, Vec<TyParamBound>>>();
4049 let old_bounds = mem::replace(&mut *cx.impl_trait_bounds.borrow_mut(), bounds);
4051 assert!(cx.impl_trait_bounds.borrow().is_empty());
4052 *cx.impl_trait_bounds.borrow_mut() = old_bounds;
4056 // Start of code copied from rust-clippy
4058 pub fn get_trait_def_id(tcx: &TyCtxt, path: &[&str], use_local: bool) -> Option<DefId> {
4060 path_to_def_local(tcx, path)
4062 path_to_def(tcx, path)
4066 pub fn path_to_def_local(tcx: &TyCtxt, path: &[&str]) -> Option<DefId> {
4067 let krate = tcx.hir.krate();
4068 let mut items = krate.module.item_ids.clone();
4069 let mut path_it = path.iter().peekable();
4072 let segment = match path_it.next() {
4073 Some(segment) => segment,
4074 None => return None,
4077 for item_id in mem::replace(&mut items, HirVec::new()).iter() {
4078 let item = tcx.hir.expect_item(item_id.id);
4079 if item.name == *segment {
4080 if path_it.peek().is_none() {
4081 return Some(tcx.hir.local_def_id(item_id.id))
4084 items = match &item.node {
4085 &hir::ItemMod(ref m) => m.item_ids.clone(),
4086 _ => panic!("Unexpected item {:?} in path {:?} path")
4094 pub fn path_to_def(tcx: &TyCtxt, path: &[&str]) -> Option<DefId> {
4095 let crates = tcx.crates();
4099 .find(|&&krate| tcx.crate_name(krate) == path[0]);
4101 if let Some(krate) = krate {
4104 index: CRATE_DEF_INDEX,
4106 let mut items = tcx.item_children(krate);
4107 let mut path_it = path.iter().skip(1).peekable();
4110 let segment = match path_it.next() {
4111 Some(segment) => segment,
4112 None => return None,
4115 for item in mem::replace(&mut items, Lrc::new(vec![])).iter() {
4116 if item.ident.name == *segment {
4117 if path_it.peek().is_none() {
4118 return match item.def {
4119 def::Def::Trait(did) => Some(did),
4124 items = tcx.item_children(item.def.def_id());
4134 fn get_path_for_type(tcx: TyCtxt, def_id: DefId, def_ctor: fn(DefId) -> Def) -> hir::Path {
4135 struct AbsolutePathBuffer {
4139 impl ty::item_path::ItemPathBuffer for AbsolutePathBuffer {
4140 fn root_mode(&self) -> &ty::item_path::RootMode {
4141 const ABSOLUTE: &'static ty::item_path::RootMode = &ty::item_path::RootMode::Absolute;
4145 fn push(&mut self, text: &str) {
4146 self.names.push(text.to_owned());
4150 let mut apb = AbsolutePathBuffer { names: vec![] };
4152 tcx.push_item_path(&mut apb, def_id);
4156 def: def_ctor(def_id),
4157 segments: hir::HirVec::from_vec(apb.names.iter().map(|s| hir::PathSegment {
4158 name: ast::Name::intern(&s),
4165 // End of code copied from rust-clippy
4168 #[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]
4169 enum RegionTarget<'tcx> {
4170 Region(Region<'tcx>),
4171 RegionVid(RegionVid)
4174 #[derive(Default, Debug, Clone)]
4175 struct RegionDeps<'tcx> {
4176 larger: FxHashSet<RegionTarget<'tcx>>,
4177 smaller: FxHashSet<RegionTarget<'tcx>>
4180 #[derive(Eq, PartialEq, Hash, Debug)]
4182 RegionBound(Lifetime),
4183 TraitBound(Vec<PathSegment>, Vec<SimpleBound>, Vec<GenericParam>, hir::TraitBoundModifier)
4186 enum AutoTraitResult {
4188 PositiveImpl(Generics),
4192 impl AutoTraitResult {
4193 fn is_auto(&self) -> bool {
4195 AutoTraitResult::PositiveImpl(_) | AutoTraitResult::NegativeImpl => true,
4201 impl From<TyParamBound> for SimpleBound {
4202 fn from(bound: TyParamBound) -> Self {
4203 match bound.clone() {
4204 TyParamBound::RegionBound(l) => SimpleBound::RegionBound(l),
4205 TyParamBound::TraitBound(t, mod_) => match t.trait_ {
4206 Type::ResolvedPath { path, typarams, .. } => {
4207 SimpleBound::TraitBound(path.segments,
4209 .map_or_else(|| Vec::new(), |v| v.iter()
4210 .map(|p| SimpleBound::from(p.clone()))
4215 _ => panic!("Unexpected bound {:?}", bound),