use crate::rmeta::table::TableBuilder;
use crate::rmeta::*;
+use rustc_ast::util::comments;
use rustc_ast::Attribute;
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
}
}
+struct AnalyzeAttrState {
+ is_exported: bool,
+ may_have_doc_links: bool,
+ is_doc_hidden: bool,
+}
+
/// Returns whether an attribute needs to be recorded in metadata, that is, if it's usable and
/// useful in downstream crates. Local-only attributes are an obvious example, but some
/// rustdoc-specific attributes can equally be of use while documenting the current crate only.
///
/// Removing these superfluous attributes speeds up compilation by making the metadata smaller.
///
-/// Note: the `is_def_id_public` parameter is used to cache whether the given `DefId` has a public
+/// Note: the `is_exported` parameter is used to cache whether the given `DefId` has a public
/// visibility: this is a piece of data that can be computed once per defid, and not once per
/// attribute. Some attributes would only be usable downstream if they are public.
#[inline]
-fn should_encode_attr(
- tcx: TyCtxt<'_>,
- attr: &Attribute,
- def_id: LocalDefId,
- is_def_id_public: &mut Option<bool>,
-) -> bool {
+fn analyze_attr(attr: &Attribute, state: &mut AnalyzeAttrState) -> bool {
+ let mut should_encode = false;
if rustc_feature::is_builtin_only_local(attr.name_or_empty()) {
// Attributes marked local-only don't need to be encoded for downstream crates.
- false
- } else if attr.doc_str().is_some() {
- // We keep all public doc comments because they might be "imported" into downstream crates
- // if they use `#[doc(inline)]` to copy an item's documentation into their own.
- *is_def_id_public.get_or_insert_with(|| tcx.effective_visibilities(()).is_exported(def_id))
+ } else if let Some(s) = attr.doc_str() {
+ // We keep all doc comments reachable to rustdoc because they might be "imported" into
+ // downstream crates if they use `#[doc(inline)]` to copy an item's documentation into
+ // their own.
+ if state.is_exported {
+ should_encode = true;
+ if comments::may_have_doc_links(s.as_str()) {
+ state.may_have_doc_links = true;
+ }
+ }
} else if attr.has_name(sym::doc) {
- // If this is a `doc` attribute, and it's marked `inline` (as in `#[doc(inline)]`), we can
- // remove it. It won't be inlinable in downstream crates.
- attr.meta_item_list().map(|l| l.iter().any(|l| !l.has_name(sym::inline))).unwrap_or(false)
+ // If this is a `doc` attribute that doesn't have anything except maybe `inline` (as in
+ // `#[doc(inline)]`), then we can remove it. It won't be inlinable in downstream crates.
+ if let Some(item_list) = attr.meta_item_list() {
+ for item in item_list {
+ if !item.has_name(sym::inline) {
+ should_encode = true;
+ if item.has_name(sym::hidden) {
+ state.is_doc_hidden = true;
+ break;
+ }
+ }
+ }
+ }
} else {
- true
+ should_encode = true;
}
+ should_encode
}
fn should_encode_visibility(def_kind: DefKind) -> bool {
// of the trait fn to look for any RPITITs, but that's kinda doing a lot
// of work. We can probably remove this when we refactor RPITITs to be
// associated types.
- tcx.fn_sig(trait_item_def_id).skip_binder().output().walk().any(|arg| {
+ tcx.fn_sig(trait_item_def_id).subst_identity().skip_binder().output().walk().any(|arg| {
if let ty::GenericArgKind::Type(ty) = arg.unpack()
&& let ty::Alias(ty::Projection, data) = ty.kind()
&& tcx.def_kind(data.def_id) == DefKind::ImplTraitPlaceholder
impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
fn encode_attrs(&mut self, def_id: LocalDefId) {
let tcx = self.tcx;
- let mut is_public: Option<bool> = None;
-
- let hir_attrs = tcx.hir().attrs(tcx.hir().local_def_id_to_hir_id(def_id));
- let mut attrs = hir_attrs
+ let mut state = AnalyzeAttrState {
+ is_exported: tcx.effective_visibilities(()).is_exported(def_id),
+ may_have_doc_links: false,
+ is_doc_hidden: false,
+ };
+ let attr_iter = tcx
+ .hir()
+ .attrs(tcx.hir().local_def_id_to_hir_id(def_id))
.iter()
- .filter(move |attr| should_encode_attr(tcx, attr, def_id, &mut is_public));
+ .filter(|attr| analyze_attr(attr, &mut state));
+
+ record_array!(self.tables.attributes[def_id.to_def_id()] <- attr_iter);
- record_array!(self.tables.attributes[def_id.to_def_id()] <- attrs.clone());
let mut attr_flags = AttrFlags::empty();
- if attrs.any(|attr| attr.may_have_doc_links()) {
+ if state.may_have_doc_links {
attr_flags |= AttrFlags::MAY_HAVE_DOC_LINKS;
}
- if hir_attrs
- .iter()
- .filter(|attr| attr.has_name(sym::doc))
- .filter_map(|attr| attr.meta_item_list())
- .any(|items| items.iter().any(|item| item.has_name(sym::hidden)))
- {
+ if state.is_doc_hidden {
attr_flags |= AttrFlags::IS_DOC_HIDDEN;
}
if !attr_flags.is_empty() {
hir::ItemKind::Struct(ref vdata, _) => {
yield item_id.owner_id.def_id.local_def_index;
// Encode constructors which take a separate slot in value namespace.
- if let Some(ctor_hir_id) = vdata.ctor_hir_id() {
- yield tcx.hir().local_def_id(ctor_hir_id).local_def_index;
+ if let Some(ctor_def_id) = vdata.ctor_def_id() {
+ yield ctor_def_id.local_def_index;
}
}
_ if tcx.def_key(item_id.owner_id.to_def_id()).get_opt_name().is_some() => {
debug!("EntryBuilder::encode_mir({:?})", def_id);
if encode_opt {
record!(self.tables.optimized_mir[def_id.to_def_id()] <- tcx.optimized_mir(def_id));
+
+ if tcx.sess.opts.unstable_opts.drop_tracking_mir && let DefKind::Generator = self.tcx.def_kind(def_id) {
+ record!(self.tables.mir_generator_witnesses[def_id.to_def_id()] <- tcx.mir_generator_witnesses(def_id));
+ }
}
if encode_const {
record!(self.tables.mir_for_ctfe[def_id.to_def_id()] <- tcx.mir_for_ctfe(def_id));
ty::Closure(_, substs) => {
let constness = self.tcx.constness(def_id.to_def_id());
self.tables.constness.set(def_id.to_def_id().index, constness);
- record!(self.tables.fn_sig[def_id.to_def_id()] <- substs.as_closure().sig());
+ record!(self.tables.fn_sig[def_id.to_def_id()] <- ty::EarlyBinder(substs.as_closure().sig()));
}
_ => bug!("closure that is neither generator nor closure"),
projects / rust.git / blobdiff