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use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::DefId;
use rustc_hir::Node;
use rustc_hir::CRATE_HIR_ID;
use rustc_middle::middle::privacy::AccessLevel;
use rustc_middle::ty::TyCtxt;
use rustc_span::def_id::{CRATE_DEF_ID, LOCAL_CRATE};
use rustc_span::symbol::{kw, sym, Symbol};
use rustc_span::Span;
use std::mem;
use crate::clean::{self, cfg::Cfg, AttributesExt, NestedAttributesExt};
use crate::core;
#[derive(Debug)]
pub(crate) struct Module<'hir> {
pub(crate) name: Symbol,
pub(crate) where_inner: Span,
pub(crate) mods: Vec<Module<'hir>>,
pub(crate) id: hir::HirId,
pub(crate) items: Vec<(&'hir hir::Item<'hir>, Option<Symbol>)>,
pub(crate) foreigns: Vec<(&'hir hir::ForeignItem<'hir>, Option<Symbol>)>,
}
impl Module<'_> {
pub(crate) fn new(name: Symbol, id: hir::HirId, where_inner: Span) -> Self {
Module { name, id, where_inner, mods: Vec::new(), items: Vec::new(), foreigns: Vec::new() }
}
pub(crate) fn where_outer(&self, tcx: TyCtxt<'_>) -> Span {
tcx.hir().span(self.id)
}
}
fn def_id_to_path(tcx: TyCtxt<'_>, did: DefId) -> Vec<Symbol> {
let crate_name = tcx.crate_name(did.krate);
let relative = tcx.def_path(did).data.into_iter().filter_map(|elem| elem.data.get_opt_name());
std::iter::once(crate_name).chain(relative).collect()
}
pub(crate) fn inherits_doc_hidden(tcx: TyCtxt<'_>, mut node: hir::HirId) -> bool {
while let Some(id) = tcx.hir().get_enclosing_scope(node) {
node = id;
if tcx.hir().attrs(node).lists(sym::doc).has_word(sym::hidden) {
return true;
}
}
false
}
pub(crate) struct RustdocVisitor<'a, 'tcx> {
cx: &'a mut core::DocContext<'tcx>,
view_item_stack: FxHashSet<hir::HirId>,
inlining: bool,
inside_public_path: bool,
exact_paths: FxHashMap<DefId, Vec<Symbol>>,
}
impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
pub(crate) fn new(cx: &'a mut core::DocContext<'tcx>) -> RustdocVisitor<'a, 'tcx> {
let mut stack = FxHashSet::default();
stack.insert(hir::CRATE_HIR_ID);
RustdocVisitor {
cx,
view_item_stack: stack,
inlining: false,
inside_public_path: true,
exact_paths: FxHashMap::default(),
}
}
fn store_path(&mut self, did: DefId) {
let tcx = self.cx.tcx;
self.exact_paths.entry(did).or_insert_with(|| def_id_to_path(tcx, did));
}
pub(crate) fn visit(mut self) -> Module<'tcx> {
let mut top_level_module = self.visit_mod_contents(
hir::CRATE_HIR_ID,
self.cx.tcx.hir().root_module(),
self.cx.tcx.crate_name(LOCAL_CRATE),
);
let mut inserted = FxHashSet::default();
for export in self.cx.tcx.module_reexports(CRATE_DEF_ID).unwrap_or(&[]) {
if let Res::Def(DefKind::Macro(_), def_id) = export.res {
if let Some(local_def_id) = def_id.as_local() {
if self.cx.tcx.has_attr(def_id, sym::macro_export) {
if inserted.insert(def_id) {
let item = self.cx.tcx.hir().expect_item(local_def_id);
top_level_module.items.push((item, None));
}
}
}
}
}
self.cx.cache.hidden_cfg = self
.cx
.tcx
.hir()
.attrs(CRATE_HIR_ID)
.iter()
.filter(|attr| attr.has_name(sym::doc))
.flat_map(|attr| attr.meta_item_list().into_iter().flatten())
.filter(|attr| attr.has_name(sym::cfg_hide))
.flat_map(|attr| {
attr.meta_item_list()
.unwrap_or(&[])
.iter()
.filter_map(|attr| {
Cfg::parse(attr.meta_item()?)
.map_err(|e| self.cx.sess().diagnostic().span_err(e.span, e.msg))
.ok()
})
.collect::<Vec<_>>()
})
.chain(
[Cfg::Cfg(sym::test, None), Cfg::Cfg(sym::doc, None), Cfg::Cfg(sym::doctest, None)]
.into_iter(),
)
.collect();
self.cx.cache.exact_paths = self.exact_paths;
top_level_module
}
fn visit_mod_contents(
&mut self,
id: hir::HirId,
m: &'tcx hir::Mod<'tcx>,
name: Symbol,
) -> Module<'tcx> {
let mut om = Module::new(name, id, m.spans.inner_span);
let def_id = self.cx.tcx.hir().local_def_id(id).to_def_id();
let orig_inside_public_path = self.inside_public_path;
self.inside_public_path &= self.cx.tcx.visibility(def_id).is_public();
for &i in m.item_ids {
let item = self.cx.tcx.hir().item(i);
if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
continue;
}
self.visit_item(item, None, &mut om);
}
for &i in m.item_ids {
let item = self.cx.tcx.hir().item(i);
if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
self.visit_item(item, None, &mut om);
}
}
self.inside_public_path = orig_inside_public_path;
om
}
fn maybe_inline_local(
&mut self,
id: hir::HirId,
res: Res,
renamed: Option<Symbol>,
glob: bool,
om: &mut Module<'tcx>,
please_inline: bool,
) -> bool {
debug!("maybe_inline_local res: {:?}", res);
if self.cx.output_format.is_json() {
return false;
}
let tcx = self.cx.tcx;
let Some(res_did) = res.opt_def_id() else {
return false;
};
let use_attrs = tcx.hir().attrs(id);
let is_no_inline = use_attrs.lists(sym::doc).has_word(sym::no_inline)
|| use_attrs.lists(sym::doc).has_word(sym::hidden);
if !res_did.is_local() && !is_no_inline {
let attrs = clean::inline::load_attrs(self.cx, res_did);
let self_is_hidden = attrs.lists(sym::doc).has_word(sym::hidden);
if !self_is_hidden {
if let Res::Def(kind, did) = res {
if kind == DefKind::Mod {
crate::visit_lib::LibEmbargoVisitor::new(self.cx).visit_mod(did)
} else {
self.cx.cache.access_levels.map.insert(did, AccessLevel::Public);
}
}
}
return false;
}
let res_hir_id = match res_did.as_local() {
Some(n) => tcx.hir().local_def_id_to_hir_id(n),
None => return false,
};
let is_private = !self.cx.cache.access_levels.is_public(res_did);
let is_hidden = inherits_doc_hidden(self.cx.tcx, res_hir_id);
if (!please_inline && !is_private && !is_hidden) || is_no_inline {
return false;
}
if !self.view_item_stack.insert(res_hir_id) {
return false;
}
let ret = match tcx.hir().get(res_hir_id) {
Node::Item(&hir::Item { kind: hir::ItemKind::Mod(ref m), .. }) if glob => {
let prev = mem::replace(&mut self.inlining, true);
for &i in m.item_ids {
let i = self.cx.tcx.hir().item(i);
self.visit_item(i, None, om);
}
self.inlining = prev;
true
}
Node::Item(it) if !glob => {
let prev = mem::replace(&mut self.inlining, true);
self.visit_item(it, renamed, om);
self.inlining = prev;
true
}
Node::ForeignItem(it) if !glob => {
let prev = mem::replace(&mut self.inlining, true);
self.visit_foreign_item(it, renamed, om);
self.inlining = prev;
true
}
_ => false,
};
self.view_item_stack.remove(&res_hir_id);
ret
}
fn visit_item(
&mut self,
item: &'tcx hir::Item<'_>,
renamed: Option<Symbol>,
om: &mut Module<'tcx>,
) {
debug!("visiting item {:?}", item);
let name = renamed.unwrap_or(item.ident.name);
let def_id = item.def_id.to_def_id();
let is_pub = self.cx.tcx.visibility(def_id).is_public();
if is_pub {
self.store_path(item.def_id.to_def_id());
}
match item.kind {
hir::ItemKind::ForeignMod { items, .. } => {
for item in items {
let item = self.cx.tcx.hir().foreign_item(item.id);
self.visit_foreign_item(item, None, om);
}
}
_ if self.inlining && (!is_pub || renamed == Some(kw::Underscore)) => {}
hir::ItemKind::GlobalAsm(..) => {}
hir::ItemKind::Use(_, hir::UseKind::ListStem) => {}
hir::ItemKind::Use(path, kind) => {
let is_glob = kind == hir::UseKind::Glob;
if let Res::Def(DefKind::Ctor(..), _) | Res::SelfCtor(..) = path.res {
return;
}
let attrs = self.cx.tcx.hir().attrs(item.hir_id());
if is_pub && self.inside_public_path {
let please_inline = attrs.iter().any(|item| match item.meta_item_list() {
Some(ref list) if item.has_name(sym::doc) => {
list.iter().any(|i| i.has_name(sym::inline))
}
_ => false,
});
let ident = if is_glob { None } else { Some(name) };
if self.maybe_inline_local(
item.hir_id(),
path.res,
ident,
is_glob,
om,
please_inline,
) {
return;
}
}
om.items.push((item, renamed))
}
hir::ItemKind::Macro(ref macro_def, _) => {
let def_id = item.def_id.to_def_id();
let is_macro_2_0 = !macro_def.macro_rules;
let nonexported = !self.cx.tcx.has_attr(def_id, sym::macro_export);
if is_macro_2_0 || nonexported || self.inlining {
om.items.push((item, renamed));
}
}
hir::ItemKind::Mod(ref m) => {
om.mods.push(self.visit_mod_contents(item.hir_id(), m, name));
}
hir::ItemKind::Fn(..)
| hir::ItemKind::ExternCrate(..)
| hir::ItemKind::Enum(..)
| hir::ItemKind::Struct(..)
| hir::ItemKind::Union(..)
| hir::ItemKind::TyAlias(..)
| hir::ItemKind::OpaqueTy(..)
| hir::ItemKind::Static(..)
| hir::ItemKind::Trait(..)
| hir::ItemKind::TraitAlias(..) => om.items.push((item, renamed)),
hir::ItemKind::Const(..) => {
if name != kw::Underscore {
om.items.push((item, renamed));
}
}
hir::ItemKind::Impl(impl_) => {
if !self.inlining && impl_.of_trait.is_none() {
om.items.push((item, None));
}
}
}
}
fn visit_foreign_item(
&mut self,
item: &'tcx hir::ForeignItem<'_>,
renamed: Option<Symbol>,
om: &mut Module<'tcx>,
) {
if !self.inlining || self.cx.tcx.visibility(item.def_id).is_public() {
om.foreigns.push((item, renamed));
}
}
}