1use std::cell::Cell;
9use std::sync::Arc;
10
11use rustc_ast::visit::{self, AssocCtxt, Visitor, WalkItemKind};
12use rustc_ast::{
13 self as ast, AssocItem, AssocItemKind, Block, ConstItem, Delegation, Fn, ForeignItem,
14 ForeignItemKind, Impl, Item, ItemKind, MetaItemKind, NodeId, StaticItem, StmtKind, TyAlias,
15};
16use rustc_attr_parsing as attr;
17use rustc_expand::base::ResolverExpand;
18use rustc_expand::expand::AstFragment;
19use rustc_hir::def::{self, *};
20use rustc_hir::def_id::{CRATE_DEF_ID, DefId, LocalDefId};
21use rustc_index::bit_set::DenseBitSet;
22use rustc_metadata::creader::LoadedMacro;
23use rustc_middle::metadata::ModChild;
24use rustc_middle::ty::Feed;
25use rustc_middle::{bug, ty};
26use rustc_span::hygiene::{ExpnId, LocalExpnId, MacroKind};
27use rustc_span::{Ident, Span, Symbol, kw, sym};
28use tracing::debug;
29
30use crate::Namespace::{MacroNS, TypeNS, ValueNS};
31use crate::def_collector::collect_definitions;
32use crate::imports::{ImportData, ImportKind};
33use crate::macros::{MacroRulesBinding, MacroRulesScope, MacroRulesScopeRef};
34use crate::{
35 BindingKey, Determinacy, ExternPreludeEntry, Finalize, MacroData, Module, ModuleKind,
36 ModuleOrUniformRoot, NameBinding, NameBindingData, NameBindingKind, ParentScope, PathResult,
37 ResolutionError, Resolver, ResolverArenas, Segment, ToNameBinding, Used, VisResolutionError,
38 errors,
39};
40
41type Res = def::Res<NodeId>;
42
43impl<'ra, Id: Into<DefId>> ToNameBinding<'ra>
44 for (Module<'ra>, ty::Visibility<Id>, Span, LocalExpnId)
45{
46 fn to_name_binding(self, arenas: &'ra ResolverArenas<'ra>) -> NameBinding<'ra> {
47 arenas.alloc_name_binding(NameBindingData {
48 kind: NameBindingKind::Module(self.0),
49 ambiguity: None,
50 warn_ambiguity: false,
51 vis: self.1.to_def_id(),
52 span: self.2,
53 expansion: self.3,
54 })
55 }
56}
57
58impl<'ra, Id: Into<DefId>> ToNameBinding<'ra> for (Res, ty::Visibility<Id>, Span, LocalExpnId) {
59 fn to_name_binding(self, arenas: &'ra ResolverArenas<'ra>) -> NameBinding<'ra> {
60 arenas.alloc_name_binding(NameBindingData {
61 kind: NameBindingKind::Res(self.0),
62 ambiguity: None,
63 warn_ambiguity: false,
64 vis: self.1.to_def_id(),
65 span: self.2,
66 expansion: self.3,
67 })
68 }
69}
70
71impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
72 pub(crate) fn define<T>(&mut self, parent: Module<'ra>, ident: Ident, ns: Namespace, def: T)
75 where
76 T: ToNameBinding<'ra>,
77 {
78 let binding = def.to_name_binding(self.arenas);
79 let key = self.new_disambiguated_key(ident, ns);
80 if let Err(old_binding) = self.try_define(parent, key, binding, false) {
81 self.report_conflict(parent, ident, ns, old_binding, binding);
82 }
83 }
84
85 pub(crate) fn get_nearest_non_block_module(&mut self, mut def_id: DefId) -> Module<'ra> {
102 loop {
103 match self.get_module(def_id) {
104 Some(module) => return module,
105 None => def_id = self.tcx.parent(def_id),
106 }
107 }
108 }
109
110 pub(crate) fn expect_module(&mut self, def_id: DefId) -> Module<'ra> {
111 self.get_module(def_id).expect("argument `DefId` is not a module")
112 }
113
114 pub(crate) fn get_module(&mut self, def_id: DefId) -> Option<Module<'ra>> {
118 if let module @ Some(..) = self.module_map.get(&def_id) {
119 return module.copied();
120 }
121
122 if !def_id.is_local() {
123 let def_kind = self.cstore().def_kind_untracked(def_id);
125 if let DefKind::Mod | DefKind::Enum | DefKind::Trait = def_kind {
126 let parent = self
127 .tcx
128 .opt_parent(def_id)
129 .map(|parent_id| self.get_nearest_non_block_module(parent_id));
130 let expn_id = self.cstore().expn_that_defined_untracked(def_id, self.tcx.sess);
133 return Some(self.new_module(
134 parent,
135 ModuleKind::Def(def_kind, def_id, Some(self.tcx.item_name(def_id))),
136 expn_id,
137 self.def_span(def_id),
138 parent.is_some_and(|module| module.no_implicit_prelude),
140 ));
141 }
142 }
143
144 None
145 }
146
147 pub(crate) fn expn_def_scope(&mut self, expn_id: ExpnId) -> Module<'ra> {
148 match expn_id.expn_data().macro_def_id {
149 Some(def_id) => self.macro_def_scope(def_id),
150 None => expn_id
151 .as_local()
152 .and_then(|expn_id| self.ast_transform_scopes.get(&expn_id).copied())
153 .unwrap_or(self.graph_root),
154 }
155 }
156
157 pub(crate) fn macro_def_scope(&mut self, def_id: DefId) -> Module<'ra> {
158 if let Some(id) = def_id.as_local() {
159 self.local_macro_def_scopes[&id]
160 } else {
161 self.get_nearest_non_block_module(def_id)
162 }
163 }
164
165 pub(crate) fn get_macro(&mut self, res: Res) -> Option<&MacroData> {
166 match res {
167 Res::Def(DefKind::Macro(..), def_id) => Some(self.get_macro_by_def_id(def_id)),
168 Res::NonMacroAttr(_) => Some(&self.non_macro_attr),
169 _ => None,
170 }
171 }
172
173 pub(crate) fn get_macro_by_def_id(&mut self, def_id: DefId) -> &MacroData {
174 if self.macro_map.contains_key(&def_id) {
175 return &self.macro_map[&def_id];
176 }
177
178 let loaded_macro = self.cstore().load_macro_untracked(def_id, self.tcx);
179 let macro_data = match loaded_macro {
180 LoadedMacro::MacroDef { def, ident, attrs, span, edition } => {
181 self.compile_macro(&def, ident, &attrs, span, ast::DUMMY_NODE_ID, edition)
182 }
183 LoadedMacro::ProcMacro(ext) => MacroData::new(Arc::new(ext)),
184 };
185
186 self.macro_map.entry(def_id).or_insert(macro_data)
187 }
188
189 pub(crate) fn build_reduced_graph(
190 &mut self,
191 fragment: &AstFragment,
192 parent_scope: ParentScope<'ra>,
193 ) -> MacroRulesScopeRef<'ra> {
194 collect_definitions(self, fragment, parent_scope.expansion);
195 let mut visitor = BuildReducedGraphVisitor { r: self, parent_scope };
196 fragment.visit_with(&mut visitor);
197 visitor.parent_scope.macro_rules
198 }
199
200 pub(crate) fn build_reduced_graph_external(&mut self, module: Module<'ra>) {
201 for child in self.tcx.module_children(module.def_id()) {
202 let parent_scope = ParentScope::module(module, self);
203 self.build_reduced_graph_for_external_crate_res(child, parent_scope)
204 }
205 }
206
207 fn build_reduced_graph_for_external_crate_res(
209 &mut self,
210 child: &ModChild,
211 parent_scope: ParentScope<'ra>,
212 ) {
213 let parent = parent_scope.module;
214 let ModChild { ident, res, vis, ref reexport_chain } = *child;
215 let span = self.def_span(
216 reexport_chain
217 .first()
218 .and_then(|reexport| reexport.id())
219 .unwrap_or_else(|| res.def_id()),
220 );
221 let res = res.expect_non_local();
222 let expansion = parent_scope.expansion;
223 match res {
225 Res::Def(DefKind::Mod | DefKind::Enum | DefKind::Trait, def_id) => {
226 let module = self.expect_module(def_id);
227 self.define(parent, ident, TypeNS, (module, vis, span, expansion));
228 }
229 Res::Def(
230 DefKind::Struct
231 | DefKind::Union
232 | DefKind::Variant
233 | DefKind::TyAlias
234 | DefKind::ForeignTy
235 | DefKind::OpaqueTy
236 | DefKind::TraitAlias
237 | DefKind::AssocTy,
238 _,
239 )
240 | Res::PrimTy(..)
241 | Res::ToolMod => self.define(parent, ident, TypeNS, (res, vis, span, expansion)),
242 Res::Def(
243 DefKind::Fn
244 | DefKind::AssocFn
245 | DefKind::Static { .. }
246 | DefKind::Const
247 | DefKind::AssocConst
248 | DefKind::Ctor(..),
249 _,
250 ) => self.define(parent, ident, ValueNS, (res, vis, span, expansion)),
251 Res::Def(DefKind::Macro(..), _) | Res::NonMacroAttr(..) => {
252 self.define(parent, ident, MacroNS, (res, vis, span, expansion))
253 }
254 Res::Def(
255 DefKind::TyParam
256 | DefKind::ConstParam
257 | DefKind::ExternCrate
258 | DefKind::Use
259 | DefKind::ForeignMod
260 | DefKind::AnonConst
261 | DefKind::InlineConst
262 | DefKind::Field
263 | DefKind::LifetimeParam
264 | DefKind::GlobalAsm
265 | DefKind::Closure
266 | DefKind::SyntheticCoroutineBody
267 | DefKind::Impl { .. },
268 _,
269 )
270 | Res::Local(..)
271 | Res::SelfTyParam { .. }
272 | Res::SelfTyAlias { .. }
273 | Res::SelfCtor(..)
274 | Res::Err => bug!("unexpected resolution: {:?}", res),
275 }
276 }
277}
278
279struct BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
280 r: &'a mut Resolver<'ra, 'tcx>,
281 parent_scope: ParentScope<'ra>,
282}
283
284impl<'ra, 'tcx> AsMut<Resolver<'ra, 'tcx>> for BuildReducedGraphVisitor<'_, 'ra, 'tcx> {
285 fn as_mut(&mut self) -> &mut Resolver<'ra, 'tcx> {
286 self.r
287 }
288}
289
290impl<'a, 'ra, 'tcx> BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
291 fn res(&self, def_id: impl Into<DefId>) -> Res {
292 let def_id = def_id.into();
293 Res::Def(self.r.tcx.def_kind(def_id), def_id)
294 }
295
296 fn resolve_visibility(&mut self, vis: &ast::Visibility) -> ty::Visibility {
297 self.try_resolve_visibility(vis, true).unwrap_or_else(|err| {
298 self.r.report_vis_error(err);
299 ty::Visibility::Public
300 })
301 }
302
303 fn try_resolve_visibility<'ast>(
304 &mut self,
305 vis: &'ast ast::Visibility,
306 finalize: bool,
307 ) -> Result<ty::Visibility, VisResolutionError<'ast>> {
308 let parent_scope = &self.parent_scope;
309 match vis.kind {
310 ast::VisibilityKind::Public => Ok(ty::Visibility::Public),
311 ast::VisibilityKind::Inherited => {
312 Ok(match self.parent_scope.module.kind {
313 ModuleKind::Def(DefKind::Enum | DefKind::Trait, def_id, _) => {
317 self.r.tcx.visibility(def_id).expect_local()
318 }
319 _ => ty::Visibility::Restricted(
321 self.parent_scope.module.nearest_parent_mod().expect_local(),
322 ),
323 })
324 }
325 ast::VisibilityKind::Restricted { ref path, id, .. } => {
326 let ident = path.segments.get(0).expect("empty path in visibility").ident;
331 let crate_root = if ident.is_path_segment_keyword() {
332 None
333 } else if ident.span.is_rust_2015() {
334 Some(Segment::from_ident(Ident::new(
335 kw::PathRoot,
336 path.span.shrink_to_lo().with_ctxt(ident.span.ctxt()),
337 )))
338 } else {
339 return Err(VisResolutionError::Relative2018(ident.span, path));
340 };
341
342 let segments = crate_root
343 .into_iter()
344 .chain(path.segments.iter().map(|seg| seg.into()))
345 .collect::<Vec<_>>();
346 let expected_found_error = |res| {
347 Err(VisResolutionError::ExpectedFound(
348 path.span,
349 Segment::names_to_string(&segments),
350 res,
351 ))
352 };
353 match self.r.resolve_path(
354 &segments,
355 None,
356 parent_scope,
357 finalize.then(|| Finalize::new(id, path.span)),
358 None,
359 None,
360 ) {
361 PathResult::Module(ModuleOrUniformRoot::Module(module)) => {
362 let res = module.res().expect("visibility resolved to unnamed block");
363 if finalize {
364 self.r.record_partial_res(id, PartialRes::new(res));
365 }
366 if module.is_normal() {
367 match res {
368 Res::Err => Ok(ty::Visibility::Public),
369 _ => {
370 let vis = ty::Visibility::Restricted(res.def_id());
371 if self.r.is_accessible_from(vis, parent_scope.module) {
372 Ok(vis.expect_local())
373 } else {
374 Err(VisResolutionError::AncestorOnly(path.span))
375 }
376 }
377 }
378 } else {
379 expected_found_error(res)
380 }
381 }
382 PathResult::Module(..) => Err(VisResolutionError::ModuleOnly(path.span)),
383 PathResult::NonModule(partial_res) => {
384 expected_found_error(partial_res.expect_full_res())
385 }
386 PathResult::Failed { span, label, suggestion, .. } => {
387 Err(VisResolutionError::FailedToResolve(span, label, suggestion))
388 }
389 PathResult::Indeterminate => Err(VisResolutionError::Indeterminate(path.span)),
390 }
391 }
392 }
393 }
394
395 fn insert_field_idents(&mut self, def_id: LocalDefId, fields: &[ast::FieldDef]) {
396 if fields.iter().any(|field| field.is_placeholder) {
397 return;
399 }
400 let fields = fields
401 .iter()
402 .enumerate()
403 .map(|(i, field)| {
404 field.ident.unwrap_or_else(|| Ident::from_str_and_span(&format!("{i}"), field.span))
405 })
406 .collect();
407 self.r.field_names.insert(def_id, fields);
408 }
409
410 fn insert_field_visibilities_local(&mut self, def_id: DefId, fields: &[ast::FieldDef]) {
411 let field_vis = fields
412 .iter()
413 .map(|field| field.vis.span.until(field.ident.map_or(field.ty.span, |i| i.span)))
414 .collect();
415 self.r.field_visibility_spans.insert(def_id, field_vis);
416 }
417
418 fn block_needs_anonymous_module(&mut self, block: &Block) -> bool {
419 block
421 .stmts
422 .iter()
423 .any(|statement| matches!(statement.kind, StmtKind::Item(_) | StmtKind::MacCall(_)))
424 }
425
426 fn add_import(
428 &mut self,
429 module_path: Vec<Segment>,
430 kind: ImportKind<'ra>,
431 span: Span,
432 item: &ast::Item,
433 root_span: Span,
434 root_id: NodeId,
435 vis: ty::Visibility,
436 ) {
437 let current_module = self.parent_scope.module;
438 let import = self.r.arenas.alloc_import(ImportData {
439 kind,
440 parent_scope: self.parent_scope,
441 module_path,
442 imported_module: Cell::new(None),
443 span,
444 use_span: item.span,
445 use_span_with_attributes: item.span_with_attributes(),
446 has_attributes: !item.attrs.is_empty(),
447 root_span,
448 root_id,
449 vis,
450 });
451
452 self.r.indeterminate_imports.push(import);
453 match import.kind {
454 ImportKind::Single { target: Ident { name: kw::Underscore, .. }, .. } => {}
456 ImportKind::Single { target, type_ns_only, .. } => {
457 self.r.per_ns(|this, ns| {
458 if !type_ns_only || ns == TypeNS {
459 let key = BindingKey::new(target, ns);
460 let mut resolution = this.resolution(current_module, key).borrow_mut();
461 resolution.single_imports.insert(import);
462 }
463 });
464 }
465 ImportKind::Glob { is_prelude: true, .. } => {}
468 ImportKind::Glob { .. } => current_module.globs.borrow_mut().push(import),
469 _ => unreachable!(),
470 }
471 }
472
473 fn build_reduced_graph_for_use_tree(
474 &mut self,
475 use_tree: &ast::UseTree,
477 id: NodeId,
478 parent_prefix: &[Segment],
479 nested: bool,
480 list_stem: bool,
481 item: &Item,
483 vis: ty::Visibility,
484 root_span: Span,
485 ) {
486 debug!(
487 "build_reduced_graph_for_use_tree(parent_prefix={:?}, use_tree={:?}, nested={})",
488 parent_prefix, use_tree, nested
489 );
490
491 if nested && !list_stem {
494 self.r.feed_visibility(self.r.feed(id), vis);
495 }
496
497 let mut prefix_iter = parent_prefix
498 .iter()
499 .cloned()
500 .chain(use_tree.prefix.segments.iter().map(|seg| seg.into()))
501 .peekable();
502
503 let is_glob = matches!(use_tree.kind, ast::UseTreeKind::Glob);
508 let crate_root = match prefix_iter.peek() {
509 Some(seg) if !seg.ident.is_path_segment_keyword() && seg.ident.span.is_rust_2015() => {
510 Some(seg.ident.span.ctxt())
511 }
512 None if is_glob && use_tree.span.is_rust_2015() => Some(use_tree.span.ctxt()),
513 _ => None,
514 }
515 .map(|ctxt| {
516 Segment::from_ident(Ident::new(
517 kw::PathRoot,
518 use_tree.prefix.span.shrink_to_lo().with_ctxt(ctxt),
519 ))
520 });
521
522 let prefix = crate_root.into_iter().chain(prefix_iter).collect::<Vec<_>>();
523 debug!("build_reduced_graph_for_use_tree: prefix={:?}", prefix);
524
525 let empty_for_self = |prefix: &[Segment]| {
526 prefix.is_empty() || prefix.len() == 1 && prefix[0].ident.name == kw::PathRoot
527 };
528 match use_tree.kind {
529 ast::UseTreeKind::Simple(rename) => {
530 let mut ident = use_tree.ident();
531 let mut module_path = prefix;
532 let mut source = module_path.pop().unwrap();
533 let mut type_ns_only = false;
534
535 if nested {
536 if source.ident.name == kw::SelfLower {
538 type_ns_only = true;
539
540 if empty_for_self(&module_path) {
541 self.r.report_error(
542 use_tree.span,
543 ResolutionError::SelfImportOnlyInImportListWithNonEmptyPrefix,
544 );
545 return;
546 }
547
548 let self_span = source.ident.span;
550 source = module_path.pop().unwrap();
551 if rename.is_none() {
552 ident = Ident::new(source.ident.name, self_span);
554 }
555 }
556 } else {
557 if source.ident.name == kw::SelfLower {
559 let parent = module_path.last();
560
561 let span = match parent {
562 Some(seg) => seg.ident.span.shrink_to_hi().to(source.ident.span),
564 None => source.ident.span,
565 };
566 let span_with_rename = match rename {
567 Some(rename) => source.ident.span.to(rename.span),
569 None => source.ident.span,
570 };
571 self.r.report_error(
572 span,
573 ResolutionError::SelfImportsOnlyAllowedWithin {
574 root: parent.is_none(),
575 span_with_rename,
576 },
577 );
578
579 if let Some(parent) = module_path.pop() {
581 source = parent;
582 if rename.is_none() {
583 ident = source.ident;
584 }
585 }
586 }
587
588 if source.ident.name == kw::DollarCrate && module_path.is_empty() {
590 let crate_root = self.r.resolve_crate_root(source.ident);
591 let crate_name = match crate_root.kind {
592 ModuleKind::Def(.., name) => name,
593 ModuleKind::Block => unreachable!(),
594 };
595 if let Some(crate_name) = crate_name {
599 module_path.push(Segment::from_ident_and_id(
601 Ident::new(kw::PathRoot, source.ident.span),
602 self.r.next_node_id(),
603 ));
604 source.ident.name = crate_name;
605 }
606 if rename.is_none() {
607 ident.name = sym::dummy;
608 }
609
610 self.r.dcx().emit_err(errors::CrateImported { span: item.span });
611 }
612 }
613
614 if ident.name == kw::Crate {
615 self.r.dcx().emit_err(errors::UnnamedCrateRootImport { span: ident.span });
616 }
617
618 let kind = ImportKind::Single {
619 source: source.ident,
620 target: ident,
621 source_bindings: PerNS {
622 type_ns: Cell::new(Err(Determinacy::Undetermined)),
623 value_ns: Cell::new(Err(Determinacy::Undetermined)),
624 macro_ns: Cell::new(Err(Determinacy::Undetermined)),
625 },
626 target_bindings: PerNS {
627 type_ns: Cell::new(None),
628 value_ns: Cell::new(None),
629 macro_ns: Cell::new(None),
630 },
631 type_ns_only,
632 nested,
633 id,
634 };
635
636 self.add_import(module_path, kind, use_tree.span, item, root_span, item.id, vis);
637 }
638 ast::UseTreeKind::Glob => {
639 let kind = ImportKind::Glob {
640 is_prelude: ast::attr::contains_name(&item.attrs, sym::prelude_import),
641 max_vis: Cell::new(None),
642 id,
643 };
644
645 self.add_import(prefix, kind, use_tree.span, item, root_span, item.id, vis);
646 }
647 ast::UseTreeKind::Nested { ref items, .. } => {
648 let self_spans = items
650 .iter()
651 .filter_map(|(use_tree, _)| {
652 if let ast::UseTreeKind::Simple(..) = use_tree.kind
653 && use_tree.ident().name == kw::SelfLower
654 {
655 return Some(use_tree.span);
656 }
657
658 None
659 })
660 .collect::<Vec<_>>();
661 if self_spans.len() > 1 {
662 let mut e = self.r.into_struct_error(
663 self_spans[0],
664 ResolutionError::SelfImportCanOnlyAppearOnceInTheList,
665 );
666
667 for other_span in self_spans.iter().skip(1) {
668 e.span_label(*other_span, "another `self` import appears here");
669 }
670
671 e.emit();
672 }
673
674 for &(ref tree, id) in items {
675 self.build_reduced_graph_for_use_tree(
676 tree, id, &prefix, true, false, item, vis, root_span,
679 );
680 }
681
682 if items.is_empty() && !empty_for_self(&prefix) {
686 let new_span = prefix[prefix.len() - 1].ident.span;
687 let tree = ast::UseTree {
688 prefix: ast::Path::from_ident(Ident::new(kw::SelfLower, new_span)),
689 kind: ast::UseTreeKind::Simple(Some(Ident::new(kw::Underscore, new_span))),
690 span: use_tree.span,
691 };
692 self.build_reduced_graph_for_use_tree(
693 &tree,
695 id,
696 &prefix,
697 true,
698 true,
699 item,
701 ty::Visibility::Restricted(
702 self.parent_scope.module.nearest_parent_mod().expect_local(),
703 ),
704 root_span,
705 );
706 }
707 }
708 }
709 }
710
711 fn build_reduced_graph_for_struct_variant(
712 &mut self,
713 fields: &[ast::FieldDef],
714 ident: Ident,
715 feed: Feed<'tcx, LocalDefId>,
716 adt_res: Res,
717 adt_vis: ty::Visibility,
718 adt_span: Span,
719 ) {
720 let parent_scope = &self.parent_scope;
721 let parent = parent_scope.module;
722 let expansion = parent_scope.expansion;
723
724 self.r.define(parent, ident, TypeNS, (adt_res, adt_vis, adt_span, expansion));
726 self.r.feed_visibility(feed, adt_vis);
727 let def_id = feed.key();
728
729 self.insert_field_idents(def_id, fields);
731 self.insert_field_visibilities_local(def_id.to_def_id(), fields);
732 }
733
734 fn build_reduced_graph_for_item(&mut self, item: &'a Item) {
736 let parent_scope = &self.parent_scope;
737 let parent = parent_scope.module;
738 let expansion = parent_scope.expansion;
739 let sp = item.span;
740 let vis = self.resolve_visibility(&item.vis);
741 let feed = self.r.feed(item.id);
742 let local_def_id = feed.key();
743 let def_id = local_def_id.to_def_id();
744 let def_kind = self.r.tcx.def_kind(def_id);
745 let res = Res::Def(def_kind, def_id);
746
747 self.r.feed_visibility(feed, vis);
748
749 match item.kind {
750 ItemKind::Use(ref use_tree) => {
751 self.build_reduced_graph_for_use_tree(
752 use_tree,
754 item.id,
755 &[],
756 false,
757 false,
758 item,
760 vis,
761 use_tree.span,
762 );
763 }
764
765 ItemKind::ExternCrate(orig_name, ident) => {
766 self.build_reduced_graph_for_extern_crate(
767 orig_name,
768 item,
769 ident,
770 local_def_id,
771 vis,
772 parent,
773 );
774 }
775
776 ItemKind::Mod(_, ident, ref mod_kind) => {
777 let module = self.r.new_module(
778 Some(parent),
779 ModuleKind::Def(def_kind, def_id, Some(ident.name)),
780 expansion.to_expn_id(),
781 item.span,
782 parent.no_implicit_prelude
783 || ast::attr::contains_name(&item.attrs, sym::no_implicit_prelude),
784 );
785 self.r.define(parent, ident, TypeNS, (module, vis, sp, expansion));
786
787 if let ast::ModKind::Loaded(_, _, _, Err(_)) = mod_kind {
788 self.r.mods_with_parse_errors.insert(def_id);
789 }
790
791 self.parent_scope.module = module;
793 }
794
795 ItemKind::Const(box ConstItem { ident, .. })
797 | ItemKind::Delegation(box Delegation { ident, .. })
798 | ItemKind::Static(box StaticItem { ident, .. }) => {
799 self.r.define(parent, ident, ValueNS, (res, vis, sp, expansion));
800 }
801 ItemKind::Fn(box Fn { ident, .. }) => {
802 self.r.define(parent, ident, ValueNS, (res, vis, sp, expansion));
803
804 self.define_macro(item);
807 }
808
809 ItemKind::TyAlias(box TyAlias { ident, .. }) | ItemKind::TraitAlias(ident, ..) => {
811 self.r.define(parent, ident, TypeNS, (res, vis, sp, expansion));
812 }
813
814 ItemKind::Enum(ident, _, _) | ItemKind::Trait(box ast::Trait { ident, .. }) => {
815 let module = self.r.new_module(
816 Some(parent),
817 ModuleKind::Def(def_kind, def_id, Some(ident.name)),
818 expansion.to_expn_id(),
819 item.span,
820 parent.no_implicit_prelude,
821 );
822 self.r.define(parent, ident, TypeNS, (module, vis, sp, expansion));
823 self.parent_scope.module = module;
824 }
825
826 ItemKind::Struct(ident, _, ref vdata) => {
828 self.build_reduced_graph_for_struct_variant(
829 vdata.fields(),
830 ident,
831 feed,
832 res,
833 vis,
834 sp,
835 );
836
837 if let Some(ctor_node_id) = vdata.ctor_node_id() {
840 let mut ctor_vis = if vis.is_public()
843 && ast::attr::contains_name(&item.attrs, sym::non_exhaustive)
844 {
845 ty::Visibility::Restricted(CRATE_DEF_ID)
846 } else {
847 vis
848 };
849
850 let mut ret_fields = Vec::with_capacity(vdata.fields().len());
851
852 for field in vdata.fields() {
853 let field_vis = self
857 .try_resolve_visibility(&field.vis, false)
858 .unwrap_or(ty::Visibility::Public);
859 if ctor_vis.is_at_least(field_vis, self.r.tcx) {
860 ctor_vis = field_vis;
861 }
862 ret_fields.push(field_vis.to_def_id());
863 }
864 let feed = self.r.feed(ctor_node_id);
865 let ctor_def_id = feed.key();
866 let ctor_res = self.res(ctor_def_id);
867 self.r.define(parent, ident, ValueNS, (ctor_res, ctor_vis, sp, expansion));
868 self.r.feed_visibility(feed, ctor_vis);
869 self.insert_field_visibilities_local(ctor_def_id.to_def_id(), vdata.fields());
871
872 self.r
873 .struct_constructors
874 .insert(local_def_id, (ctor_res, ctor_vis.to_def_id(), ret_fields));
875 }
876 }
877
878 ItemKind::Union(ident, _, ref vdata) => {
879 self.build_reduced_graph_for_struct_variant(
880 vdata.fields(),
881 ident,
882 feed,
883 res,
884 vis,
885 sp,
886 );
887 }
888
889 ItemKind::Impl(box Impl { of_trait: Some(..), .. })
891 | ItemKind::Impl { .. }
892 | ItemKind::ForeignMod(..)
893 | ItemKind::GlobalAsm(..) => {}
894
895 ItemKind::MacroDef(..) | ItemKind::MacCall(_) | ItemKind::DelegationMac(..) => {
896 unreachable!()
897 }
898 }
899 }
900
901 fn build_reduced_graph_for_extern_crate(
902 &mut self,
903 orig_name: Option<Symbol>,
904 item: &Item,
905 ident: Ident,
906 local_def_id: LocalDefId,
907 vis: ty::Visibility,
908 parent: Module<'ra>,
909 ) {
910 let sp = item.span;
911 let parent_scope = self.parent_scope;
912 let expansion = parent_scope.expansion;
913
914 let (used, module, binding) = if orig_name.is_none() && ident.name == kw::SelfLower {
915 self.r.dcx().emit_err(errors::ExternCrateSelfRequiresRenaming { span: sp });
916 return;
917 } else if orig_name == Some(kw::SelfLower) {
918 Some(self.r.graph_root)
919 } else {
920 let tcx = self.r.tcx;
921 let crate_id = self.r.crate_loader(|c| {
922 c.process_extern_crate(item, local_def_id, &tcx.definitions_untracked())
923 });
924 crate_id.map(|crate_id| {
925 self.r.extern_crate_map.insert(local_def_id, crate_id);
926 self.r.expect_module(crate_id.as_def_id())
927 })
928 }
929 .map(|module| {
930 let used = self.process_macro_use_imports(item, module);
931 let vis = ty::Visibility::<LocalDefId>::Public;
932 let binding = (module, vis, sp, expansion).to_name_binding(self.r.arenas);
933 (used, Some(ModuleOrUniformRoot::Module(module)), binding)
934 })
935 .unwrap_or((true, None, self.r.dummy_binding));
936 let import = self.r.arenas.alloc_import(ImportData {
937 kind: ImportKind::ExternCrate { source: orig_name, target: ident, id: item.id },
938 root_id: item.id,
939 parent_scope: self.parent_scope,
940 imported_module: Cell::new(module),
941 has_attributes: !item.attrs.is_empty(),
942 use_span_with_attributes: item.span_with_attributes(),
943 use_span: item.span,
944 root_span: item.span,
945 span: item.span,
946 module_path: Vec::new(),
947 vis,
948 });
949 if used {
950 self.r.import_use_map.insert(import, Used::Other);
951 }
952 self.r.potentially_unused_imports.push(import);
953 let imported_binding = self.r.import(binding, import);
954 if parent == self.r.graph_root {
955 let ident = ident.normalize_to_macros_2_0();
956 if let Some(entry) = self.r.extern_prelude.get(&ident)
957 && expansion != LocalExpnId::ROOT
958 && orig_name.is_some()
959 && !entry.is_import()
960 {
961 self.r.dcx().emit_err(
962 errors::MacroExpandedExternCrateCannotShadowExternArguments { span: item.span },
963 );
964 return;
969 }
970 let entry = self
971 .r
972 .extern_prelude
973 .entry(ident)
974 .or_insert(ExternPreludeEntry { binding: None, introduced_by_item: true });
975 if orig_name.is_some() {
976 entry.introduced_by_item = true;
977 }
978 if !entry.is_import() {
981 entry.binding = Some(imported_binding)
982 } else if ident.name != kw::Underscore {
983 self.r.dcx().span_delayed_bug(
984 item.span,
985 format!("it had been define the external module '{ident}' multiple times"),
986 );
987 }
988 }
989 self.r.define(parent, ident, TypeNS, imported_binding);
990 }
991
992 fn build_reduced_graph_for_foreign_item(&mut self, item: &ForeignItem, ident: Ident) {
994 let feed = self.r.feed(item.id);
995 let local_def_id = feed.key();
996 let def_id = local_def_id.to_def_id();
997 let ns = match item.kind {
998 ForeignItemKind::Fn(..) => ValueNS,
999 ForeignItemKind::Static(..) => ValueNS,
1000 ForeignItemKind::TyAlias(..) => TypeNS,
1001 ForeignItemKind::MacCall(..) => unreachable!(),
1002 };
1003 let parent = self.parent_scope.module;
1004 let expansion = self.parent_scope.expansion;
1005 let vis = self.resolve_visibility(&item.vis);
1006 self.r.define(parent, ident, ns, (self.res(def_id), vis, item.span, expansion));
1007 self.r.feed_visibility(feed, vis);
1008 }
1009
1010 fn build_reduced_graph_for_block(&mut self, block: &Block) {
1011 let parent = self.parent_scope.module;
1012 let expansion = self.parent_scope.expansion;
1013 if self.block_needs_anonymous_module(block) {
1014 let module = self.r.new_module(
1015 Some(parent),
1016 ModuleKind::Block,
1017 expansion.to_expn_id(),
1018 block.span,
1019 parent.no_implicit_prelude,
1020 );
1021 self.r.block_map.insert(block.id, module);
1022 self.parent_scope.module = module; }
1024 }
1025
1026 fn add_macro_use_binding(
1027 &mut self,
1028 name: Symbol,
1029 binding: NameBinding<'ra>,
1030 span: Span,
1031 allow_shadowing: bool,
1032 ) {
1033 if self.r.macro_use_prelude.insert(name, binding).is_some() && !allow_shadowing {
1034 self.r.dcx().emit_err(errors::MacroUseNameAlreadyInUse { span, name });
1035 }
1036 }
1037
1038 fn process_macro_use_imports(&mut self, item: &Item, module: Module<'ra>) -> bool {
1040 let mut import_all = None;
1041 let mut single_imports = Vec::new();
1042 for attr in &item.attrs {
1043 if attr.has_name(sym::macro_use) {
1044 if self.parent_scope.module.parent.is_some() {
1045 self.r.dcx().emit_err(errors::ExternCrateLoadingMacroNotAtCrateRoot {
1046 span: item.span,
1047 });
1048 }
1049 if let ItemKind::ExternCrate(Some(orig_name), _) = item.kind
1050 && orig_name == kw::SelfLower
1051 {
1052 self.r.dcx().emit_err(errors::MacroUseExternCrateSelf { span: attr.span });
1053 }
1054 let ill_formed = |span| {
1055 self.r.dcx().emit_err(errors::BadMacroImport { span });
1056 };
1057 match attr.meta() {
1058 Some(meta) => match meta.kind {
1059 MetaItemKind::Word => {
1060 import_all = Some(meta.span);
1061 break;
1062 }
1063 MetaItemKind::List(meta_item_inners) => {
1064 for meta_item_inner in meta_item_inners {
1065 match meta_item_inner.ident() {
1066 Some(ident) if meta_item_inner.is_word() => {
1067 single_imports.push(ident)
1068 }
1069 _ => ill_formed(meta_item_inner.span()),
1070 }
1071 }
1072 }
1073 MetaItemKind::NameValue(..) => ill_formed(meta.span),
1074 },
1075 None => ill_formed(attr.span),
1076 }
1077 }
1078 }
1079
1080 let macro_use_import = |this: &Self, span, warn_private| {
1081 this.r.arenas.alloc_import(ImportData {
1082 kind: ImportKind::MacroUse { warn_private },
1083 root_id: item.id,
1084 parent_scope: this.parent_scope,
1085 imported_module: Cell::new(Some(ModuleOrUniformRoot::Module(module))),
1086 use_span_with_attributes: item.span_with_attributes(),
1087 has_attributes: !item.attrs.is_empty(),
1088 use_span: item.span,
1089 root_span: span,
1090 span,
1091 module_path: Vec::new(),
1092 vis: ty::Visibility::Restricted(CRATE_DEF_ID),
1093 })
1094 };
1095
1096 let allow_shadowing = self.parent_scope.expansion == LocalExpnId::ROOT;
1097 if let Some(span) = import_all {
1098 let import = macro_use_import(self, span, false);
1099 self.r.potentially_unused_imports.push(import);
1100 module.for_each_child(self, |this, ident, ns, binding| {
1101 if ns == MacroNS {
1102 let import = if this.r.is_accessible_from(binding.vis, this.parent_scope.module)
1103 {
1104 import
1105 } else {
1106 if this.r.macro_use_prelude.contains_key(&ident.name) {
1109 return;
1111 }
1112 macro_use_import(this, span, true)
1113 };
1114 let import_binding = this.r.import(binding, import);
1115 this.add_macro_use_binding(ident.name, import_binding, span, allow_shadowing);
1116 }
1117 });
1118 } else {
1119 for ident in single_imports.iter().cloned() {
1120 let result = self.r.maybe_resolve_ident_in_module(
1121 ModuleOrUniformRoot::Module(module),
1122 ident,
1123 MacroNS,
1124 &self.parent_scope,
1125 None,
1126 );
1127 if let Ok(binding) = result {
1128 let import = macro_use_import(self, ident.span, false);
1129 self.r.potentially_unused_imports.push(import);
1130 let imported_binding = self.r.import(binding, import);
1131 self.add_macro_use_binding(
1132 ident.name,
1133 imported_binding,
1134 ident.span,
1135 allow_shadowing,
1136 );
1137 } else {
1138 self.r.dcx().emit_err(errors::ImportedMacroNotFound { span: ident.span });
1139 }
1140 }
1141 }
1142 import_all.is_some() || !single_imports.is_empty()
1143 }
1144
1145 fn contains_macro_use(&mut self, attrs: &[ast::Attribute]) -> bool {
1147 for attr in attrs {
1148 if attr.has_name(sym::macro_escape) {
1149 let inner_attribute = matches!(attr.style, ast::AttrStyle::Inner);
1150 self.r
1151 .dcx()
1152 .emit_warn(errors::MacroExternDeprecated { span: attr.span, inner_attribute });
1153 } else if !attr.has_name(sym::macro_use) {
1154 continue;
1155 }
1156
1157 if !attr.is_word() {
1158 self.r.dcx().emit_err(errors::ArgumentsMacroUseNotAllowed { span: attr.span });
1159 }
1160 return true;
1161 }
1162
1163 false
1164 }
1165
1166 fn visit_invoc(&mut self, id: NodeId) -> LocalExpnId {
1167 let invoc_id = id.placeholder_to_expn_id();
1168 let old_parent_scope = self.r.invocation_parent_scopes.insert(invoc_id, self.parent_scope);
1169 assert!(old_parent_scope.is_none(), "invocation data is reset for an invocation");
1170 invoc_id
1171 }
1172
1173 fn visit_invoc_in_module(&mut self, id: NodeId) -> MacroRulesScopeRef<'ra> {
1176 let invoc_id = self.visit_invoc(id);
1177 self.parent_scope.module.unexpanded_invocations.borrow_mut().insert(invoc_id);
1178 self.r.arenas.alloc_macro_rules_scope(MacroRulesScope::Invocation(invoc_id))
1179 }
1180
1181 fn proc_macro_stub(
1182 &self,
1183 item: &ast::Item,
1184 fn_ident: Ident,
1185 ) -> Option<(MacroKind, Ident, Span)> {
1186 if ast::attr::contains_name(&item.attrs, sym::proc_macro) {
1187 return Some((MacroKind::Bang, fn_ident, item.span));
1188 } else if ast::attr::contains_name(&item.attrs, sym::proc_macro_attribute) {
1189 return Some((MacroKind::Attr, fn_ident, item.span));
1190 } else if let Some(attr) = ast::attr::find_by_name(&item.attrs, sym::proc_macro_derive)
1191 && let Some(meta_item_inner) =
1192 attr.meta_item_list().and_then(|list| list.get(0).cloned())
1193 && let Some(ident) = meta_item_inner.ident()
1194 {
1195 return Some((MacroKind::Derive, ident, ident.span));
1196 }
1197 None
1198 }
1199
1200 fn insert_unused_macro(&mut self, ident: Ident, def_id: LocalDefId, node_id: NodeId) {
1204 if !ident.as_str().starts_with('_') {
1205 self.r.unused_macros.insert(def_id, (node_id, ident));
1206 let nrules = self.r.macro_map[&def_id.to_def_id()].nrules;
1207 self.r.unused_macro_rules.insert(node_id, DenseBitSet::new_filled(nrules));
1208 }
1209 }
1210
1211 fn define_macro(&mut self, item: &ast::Item) -> MacroRulesScopeRef<'ra> {
1212 let parent_scope = self.parent_scope;
1213 let expansion = parent_scope.expansion;
1214 let feed = self.r.feed(item.id);
1215 let def_id = feed.key();
1216 let (res, ident, span, macro_rules) = match &item.kind {
1217 ItemKind::MacroDef(ident, def) => {
1218 (self.res(def_id), *ident, item.span, def.macro_rules)
1219 }
1220 ItemKind::Fn(box ast::Fn { ident: fn_ident, .. }) => {
1221 match self.proc_macro_stub(item, *fn_ident) {
1222 Some((macro_kind, ident, span)) => {
1223 let res = Res::Def(DefKind::Macro(macro_kind), def_id.to_def_id());
1224 let macro_data = MacroData::new(self.r.dummy_ext(macro_kind));
1225 self.r.macro_map.insert(def_id.to_def_id(), macro_data);
1226 self.r.proc_macro_stubs.insert(def_id);
1227 (res, ident, span, false)
1228 }
1229 None => return parent_scope.macro_rules,
1230 }
1231 }
1232 _ => unreachable!(),
1233 };
1234
1235 self.r.local_macro_def_scopes.insert(def_id, parent_scope.module);
1236
1237 if macro_rules {
1238 let ident = ident.normalize_to_macros_2_0();
1239 self.r.macro_names.insert(ident);
1240 let is_macro_export = ast::attr::contains_name(&item.attrs, sym::macro_export);
1241 let vis = if is_macro_export {
1242 ty::Visibility::Public
1243 } else {
1244 ty::Visibility::Restricted(CRATE_DEF_ID)
1245 };
1246 let binding = (res, vis, span, expansion).to_name_binding(self.r.arenas);
1247 self.r.set_binding_parent_module(binding, parent_scope.module);
1248 self.r.all_macro_rules.insert(ident.name);
1249 if is_macro_export {
1250 let import = self.r.arenas.alloc_import(ImportData {
1251 kind: ImportKind::MacroExport,
1252 root_id: item.id,
1253 parent_scope: self.parent_scope,
1254 imported_module: Cell::new(None),
1255 has_attributes: false,
1256 use_span_with_attributes: span,
1257 use_span: span,
1258 root_span: span,
1259 span,
1260 module_path: Vec::new(),
1261 vis,
1262 });
1263 self.r.import_use_map.insert(import, Used::Other);
1264 let import_binding = self.r.import(binding, import);
1265 self.r.define(self.r.graph_root, ident, MacroNS, import_binding);
1266 } else {
1267 self.r.check_reserved_macro_name(ident, res);
1268 self.insert_unused_macro(ident, def_id, item.id);
1269 }
1270 self.r.feed_visibility(feed, vis);
1271 let scope = self.r.arenas.alloc_macro_rules_scope(MacroRulesScope::Binding(
1272 self.r.arenas.alloc_macro_rules_binding(MacroRulesBinding {
1273 parent_macro_rules_scope: parent_scope.macro_rules,
1274 binding,
1275 ident,
1276 }),
1277 ));
1278 self.r.macro_rules_scopes.insert(def_id, scope);
1279 scope
1280 } else {
1281 let module = parent_scope.module;
1282 let vis = match item.kind {
1283 ItemKind::Fn(..) => {
1286 self.try_resolve_visibility(&item.vis, false).unwrap_or(ty::Visibility::Public)
1287 }
1288 _ => self.resolve_visibility(&item.vis),
1289 };
1290 if !vis.is_public() {
1291 self.insert_unused_macro(ident, def_id, item.id);
1292 }
1293 self.r.define(module, ident, MacroNS, (res, vis, span, expansion));
1294 self.r.feed_visibility(feed, vis);
1295 self.parent_scope.macro_rules
1296 }
1297 }
1298}
1299
1300macro_rules! method {
1301 ($visit:ident: $ty:ty, $invoc:path, $walk:ident) => {
1302 fn $visit(&mut self, node: &'a $ty) {
1303 if let $invoc(..) = node.kind {
1304 self.visit_invoc(node.id);
1305 } else {
1306 visit::$walk(self, node);
1307 }
1308 }
1309 };
1310}
1311
1312impl<'a, 'ra, 'tcx> Visitor<'a> for BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
1313 method!(visit_expr: ast::Expr, ast::ExprKind::MacCall, walk_expr);
1314 method!(visit_pat: ast::Pat, ast::PatKind::MacCall, walk_pat);
1315 method!(visit_ty: ast::Ty, ast::TyKind::MacCall, walk_ty);
1316
1317 fn visit_item(&mut self, item: &'a Item) {
1318 let orig_module_scope = self.parent_scope.module;
1319 self.parent_scope.macro_rules = match item.kind {
1320 ItemKind::MacroDef(..) => {
1321 let macro_rules_scope = self.define_macro(item);
1322 visit::walk_item(self, item);
1323 macro_rules_scope
1324 }
1325 ItemKind::MacCall(..) => self.visit_invoc_in_module(item.id),
1326 _ => {
1327 let orig_macro_rules_scope = self.parent_scope.macro_rules;
1328 self.build_reduced_graph_for_item(item);
1329 match item.kind {
1330 ItemKind::Mod(..) => {
1331 self.visit_vis(&item.vis);
1334 item.kind.walk(item.span, item.id, &item.vis, (), self);
1335 visit::walk_list!(self, visit_attribute, &item.attrs);
1336 }
1337 _ => visit::walk_item(self, item),
1338 }
1339 match item.kind {
1340 ItemKind::Mod(..) if self.contains_macro_use(&item.attrs) => {
1341 self.parent_scope.macro_rules
1342 }
1343 _ => orig_macro_rules_scope,
1344 }
1345 }
1346 };
1347 self.parent_scope.module = orig_module_scope;
1348 }
1349
1350 fn visit_stmt(&mut self, stmt: &'a ast::Stmt) {
1351 if let ast::StmtKind::MacCall(..) = stmt.kind {
1352 self.parent_scope.macro_rules = self.visit_invoc_in_module(stmt.id);
1353 } else {
1354 visit::walk_stmt(self, stmt);
1355 }
1356 }
1357
1358 fn visit_foreign_item(&mut self, foreign_item: &'a ForeignItem) {
1359 let ident = match foreign_item.kind {
1360 ForeignItemKind::Static(box StaticItem { ident, .. })
1361 | ForeignItemKind::Fn(box Fn { ident, .. })
1362 | ForeignItemKind::TyAlias(box TyAlias { ident, .. }) => ident,
1363 ForeignItemKind::MacCall(_) => {
1364 self.visit_invoc_in_module(foreign_item.id);
1365 return;
1366 }
1367 };
1368
1369 self.build_reduced_graph_for_foreign_item(foreign_item, ident);
1370 visit::walk_item(self, foreign_item);
1371 }
1372
1373 fn visit_block(&mut self, block: &'a Block) {
1374 let orig_current_module = self.parent_scope.module;
1375 let orig_current_macro_rules_scope = self.parent_scope.macro_rules;
1376 self.build_reduced_graph_for_block(block);
1377 visit::walk_block(self, block);
1378 self.parent_scope.module = orig_current_module;
1379 self.parent_scope.macro_rules = orig_current_macro_rules_scope;
1380 }
1381
1382 fn visit_assoc_item(&mut self, item: &'a AssocItem, ctxt: AssocCtxt) {
1383 let (ident, ns) = match item.kind {
1384 AssocItemKind::Const(box ConstItem { ident, .. })
1385 | AssocItemKind::Fn(box Fn { ident, .. })
1386 | AssocItemKind::Delegation(box Delegation { ident, .. }) => (ident, ValueNS),
1387
1388 AssocItemKind::Type(box TyAlias { ident, .. }) => (ident, TypeNS),
1389
1390 AssocItemKind::MacCall(_) => {
1391 match ctxt {
1392 AssocCtxt::Trait => {
1393 self.visit_invoc_in_module(item.id);
1394 }
1395 AssocCtxt::Impl { .. } => {
1396 let invoc_id = item.id.placeholder_to_expn_id();
1397 if !self.r.glob_delegation_invoc_ids.contains(&invoc_id) {
1398 self.r
1399 .impl_unexpanded_invocations
1400 .entry(self.r.invocation_parent(invoc_id))
1401 .or_default()
1402 .insert(invoc_id);
1403 }
1404 self.visit_invoc(item.id);
1405 }
1406 }
1407 return;
1408 }
1409
1410 AssocItemKind::DelegationMac(..) => bug!(),
1411 };
1412 let vis = self.resolve_visibility(&item.vis);
1413 let feed = self.r.feed(item.id);
1414 let local_def_id = feed.key();
1415 let def_id = local_def_id.to_def_id();
1416
1417 if !(matches!(ctxt, AssocCtxt::Impl { of_trait: true })
1418 && matches!(item.vis.kind, ast::VisibilityKind::Inherited))
1419 {
1420 self.r.feed_visibility(feed, vis);
1424 }
1425
1426 if ctxt == AssocCtxt::Trait {
1427 let parent = self.parent_scope.module;
1428 let expansion = self.parent_scope.expansion;
1429 self.r.define(parent, ident, ns, (self.res(def_id), vis, item.span, expansion));
1430 } else if !matches!(&item.kind, AssocItemKind::Delegation(deleg) if deleg.from_glob) {
1431 let impl_def_id = self.r.tcx.local_parent(local_def_id);
1432 let key = BindingKey::new(ident.normalize_to_macros_2_0(), ns);
1433 self.r.impl_binding_keys.entry(impl_def_id).or_default().insert(key);
1434 }
1435
1436 visit::walk_assoc_item(self, item, ctxt);
1437 }
1438
1439 fn visit_attribute(&mut self, attr: &'a ast::Attribute) {
1440 if !attr.is_doc_comment() && attr::is_builtin_attr(attr) {
1441 self.r
1442 .builtin_attrs
1443 .push((attr.get_normal_item().path.segments[0].ident, self.parent_scope));
1444 }
1445 visit::walk_attribute(self, attr);
1446 }
1447
1448 fn visit_arm(&mut self, arm: &'a ast::Arm) {
1449 if arm.is_placeholder {
1450 self.visit_invoc(arm.id);
1451 } else {
1452 visit::walk_arm(self, arm);
1453 }
1454 }
1455
1456 fn visit_expr_field(&mut self, f: &'a ast::ExprField) {
1457 if f.is_placeholder {
1458 self.visit_invoc(f.id);
1459 } else {
1460 visit::walk_expr_field(self, f);
1461 }
1462 }
1463
1464 fn visit_pat_field(&mut self, fp: &'a ast::PatField) {
1465 if fp.is_placeholder {
1466 self.visit_invoc(fp.id);
1467 } else {
1468 visit::walk_pat_field(self, fp);
1469 }
1470 }
1471
1472 fn visit_generic_param(&mut self, param: &'a ast::GenericParam) {
1473 if param.is_placeholder {
1474 self.visit_invoc(param.id);
1475 } else {
1476 visit::walk_generic_param(self, param);
1477 }
1478 }
1479
1480 fn visit_param(&mut self, p: &'a ast::Param) {
1481 if p.is_placeholder {
1482 self.visit_invoc(p.id);
1483 } else {
1484 visit::walk_param(self, p);
1485 }
1486 }
1487
1488 fn visit_field_def(&mut self, sf: &'a ast::FieldDef) {
1489 if sf.is_placeholder {
1490 self.visit_invoc(sf.id);
1491 } else {
1492 let vis = self.resolve_visibility(&sf.vis);
1493 self.r.feed_visibility(self.r.feed(sf.id), vis);
1494 visit::walk_field_def(self, sf);
1495 }
1496 }
1497
1498 fn visit_variant(&mut self, variant: &'a ast::Variant) {
1501 if variant.is_placeholder {
1502 self.visit_invoc_in_module(variant.id);
1503 return;
1504 }
1505
1506 let parent = self.parent_scope.module;
1507 let expn_id = self.parent_scope.expansion;
1508 let ident = variant.ident;
1509
1510 let feed = self.r.feed(variant.id);
1512 let def_id = feed.key();
1513 let vis = self.resolve_visibility(&variant.vis);
1514 self.r.define(parent, ident, TypeNS, (self.res(def_id), vis, variant.span, expn_id));
1515 self.r.feed_visibility(feed, vis);
1516
1517 let ctor_vis =
1519 if vis.is_public() && ast::attr::contains_name(&variant.attrs, sym::non_exhaustive) {
1520 ty::Visibility::Restricted(CRATE_DEF_ID)
1521 } else {
1522 vis
1523 };
1524
1525 if let Some(ctor_node_id) = variant.data.ctor_node_id() {
1527 let feed = self.r.feed(ctor_node_id);
1528 let ctor_def_id = feed.key();
1529 let ctor_res = self.res(ctor_def_id);
1530 self.r.define(parent, ident, ValueNS, (ctor_res, ctor_vis, variant.span, expn_id));
1531 self.r.feed_visibility(feed, ctor_vis);
1532 }
1533
1534 self.insert_field_idents(def_id, variant.data.fields());
1536 self.insert_field_visibilities_local(def_id.to_def_id(), variant.data.fields());
1537
1538 visit::walk_variant(self, variant);
1539 }
1540
1541 fn visit_where_predicate(&mut self, p: &'a ast::WherePredicate) {
1542 if p.is_placeholder {
1543 self.visit_invoc(p.id);
1544 } else {
1545 visit::walk_where_predicate(self, p);
1546 }
1547 }
1548
1549 fn visit_crate(&mut self, krate: &'a ast::Crate) {
1550 if krate.is_placeholder {
1551 self.visit_invoc_in_module(krate.id);
1552 } else {
1553 visit::walk_list!(self, visit_item, &krate.items);
1556 visit::walk_list!(self, visit_attribute, &krate.attrs);
1557 self.contains_macro_use(&krate.attrs);
1558 }
1559 }
1560}