1 use rustc::middle::privacy::{AccessLevels, AccessLevel};
2 use rustc::hir::def::{Res, DefKind};
3 use rustc::hir::def_id::{CrateNum, CRATE_DEF_INDEX, DefId};
4 use rustc::ty::Visibility;
5 use rustc::util::nodemap::FxHashSet;
6 use syntax::symbol::sym;
10 use crate::clean::{AttributesExt, NestedAttributesExt};
12 // FIXME: this may not be exhaustive, but is sufficient for rustdocs current uses
14 /// Similar to `librustc_privacy::EmbargoVisitor`, but also takes
15 /// specific rustdoc annotations into account (i.e., `doc(hidden)`)
16 pub struct LibEmbargoVisitor<'a, 'tcx> {
17 cx: &'a crate::core::DocContext<'tcx>,
18 // Accessibility levels for reachable nodes
19 access_levels: RefMut<'a, AccessLevels<DefId>>,
20 // Previous accessibility level, None means unreachable
21 prev_level: Option<AccessLevel>,
22 // Keeps track of already visited modules, in case a module re-exports its parent
23 visited_mods: FxHashSet<DefId>,
26 impl<'a, 'tcx> LibEmbargoVisitor<'a, 'tcx> {
28 cx: &'a crate::core::DocContext<'tcx>
29 ) -> LibEmbargoVisitor<'a, 'tcx> {
32 access_levels: RefMut::map(cx.renderinfo.borrow_mut(), |ri| &mut ri.access_levels),
33 prev_level: Some(AccessLevel::Public),
34 visited_mods: FxHashSet::default()
38 pub fn visit_lib(&mut self, cnum: CrateNum) {
39 let did = DefId { krate: cnum, index: CRATE_DEF_INDEX };
40 self.update(did, Some(AccessLevel::Public));
44 // Updates node level and returns the updated level
45 fn update(&mut self, did: DefId, level: Option<AccessLevel>) -> Option<AccessLevel> {
46 let is_hidden = self.cx.tcx.get_attrs(did).lists(sym::doc).has_word(sym::hidden);
48 let old_level = self.access_levels.map.get(&did).cloned();
49 // Accessibility levels can only grow
50 if level > old_level && !is_hidden {
51 self.access_levels.map.insert(did, level.unwrap());
58 pub fn visit_mod(&mut self, def_id: DefId) {
59 if !self.visited_mods.insert(def_id) {
63 for item in self.cx.tcx.item_children(def_id).iter() {
64 if let Some(def_id) = item.res.opt_def_id() {
65 if self.cx.tcx.def_key(def_id).parent.map_or(false, |d| d == def_id.index) ||
66 item.vis == Visibility::Public {
67 self.visit_item(item.res);
73 fn visit_item(&mut self, res: Res) {
74 let def_id = res.def_id();
75 let vis = self.cx.tcx.visibility(def_id);
76 let inherited_item_level = if vis == Visibility::Public {
82 let item_level = self.update(def_id, inherited_item_level);
84 if let Res::Def(DefKind::Mod, _) = res {
85 let orig_level = self.prev_level;
87 self.prev_level = item_level;
88 self.visit_mod(def_id);
89 self.prev_level = orig_level;