1 //! Write the output of rustc's analysis to an implementor of Dump.
3 //! Dumping the analysis is implemented by walking the AST and getting a bunch of
4 //! info out from all over the place. We use `DefId`s to identify objects. The
5 //! tricky part is getting syntactic (span, source text) and semantic (reference
6 //! `DefId`s) information for parts of expressions which the compiler has discarded.
7 //! E.g., in a path `foo::bar::baz`, the compiler only keeps a span for the whole
8 //! path and a reference to `baz`, but we want spans and references for all three
11 //! SpanUtils is used to manipulate spans. In particular, to extract sub-spans
12 //! from spans (e.g., the span for `bar` from the above example path).
13 //! DumpVisitor walks the AST and processes it, and Dumper is used for
14 //! recording the output.
16 use rustc_ast::ast::{self};
17 use rustc_ast::{token, walk_list};
18 use rustc_data_structures::fx::FxHashSet;
20 use rustc_hir::def::{DefKind as HirDefKind, Res};
21 use rustc_hir::def_id::{DefId, LocalDefId};
22 use rustc_hir::intravisit::{self, Visitor};
23 use rustc_hir_pretty::{bounds_to_string, fn_to_string, generic_params_to_string, ty_to_string};
24 use rustc_middle::hir::map::Map;
25 use rustc_middle::span_bug;
26 use rustc_middle::ty::{self, DefIdTree, TyCtxt};
27 use rustc_session::config::Input;
28 use rustc_span::source_map::respan;
29 use rustc_span::symbol::Ident;
35 use crate::dumper::{Access, Dumper};
37 use crate::span_utils::SpanUtils;
39 escape, generated_code, id_from_def_id, id_from_hir_id, lower_attributes, PathCollector,
44 CompilationOptions, CratePreludeData, Def, DefKind, GlobalCrateId, Import, ImportKind, Ref,
45 RefKind, Relation, RelationKind, SpanData,
48 use log::{debug, error};
50 macro_rules! down_cast_data {
51 ($id:ident, $kind:ident, $sp:expr) => {
52 let $id = if let super::Data::$kind(data) = $id {
55 span_bug!($sp, "unexpected data kind: {:?}", $id);
60 macro_rules! access_from {
61 ($save_ctxt:expr, $item:expr, $id:expr) => {
63 public: $item.vis.node.is_pub(),
64 reachable: $save_ctxt.access_levels.is_reachable($id),
69 macro_rules! access_from_vis {
70 ($save_ctxt:expr, $vis:expr, $id:expr) => {
71 Access { public: $vis.node.is_pub(), reachable: $save_ctxt.access_levels.is_reachable($id) }
75 pub struct DumpVisitor<'tcx> {
76 pub save_ctxt: SaveContext<'tcx>,
80 span: SpanUtils<'tcx>,
81 // Set of macro definition (callee) spans, and the set
82 // of macro use (callsite) spans. We store these to ensure
83 // we only write one macro def per unique macro definition, and
84 // one macro use per unique callsite span.
85 // mac_defs: FxHashSet<Span>,
86 // macro_calls: FxHashSet<Span>,
89 impl<'tcx> DumpVisitor<'tcx> {
90 pub fn new(save_ctxt: SaveContext<'tcx>) -> DumpVisitor<'tcx> {
91 let span_utils = SpanUtils::new(&save_ctxt.tcx.sess);
92 let dumper = Dumper::new(save_ctxt.config.clone());
98 // mac_defs: FxHashSet::default(),
99 // macro_calls: FxHashSet::default(),
103 pub fn analysis(&self) -> &rls_data::Analysis {
104 self.dumper.analysis()
107 fn nest_tables<F>(&mut self, item_def_id: LocalDefId, f: F)
109 F: FnOnce(&mut Self),
111 let tables = if self.tcx.has_typeck_tables(item_def_id) {
112 Some(self.tcx.typeck_tables_of(item_def_id))
117 let old_maybe_typeck_tables = self.save_ctxt.maybe_typeck_tables;
118 self.save_ctxt.maybe_typeck_tables = tables;
120 self.save_ctxt.maybe_typeck_tables = old_maybe_typeck_tables;
123 fn span_from_span(&self, span: Span) -> SpanData {
124 self.save_ctxt.span_from_span(span)
127 fn lookup_def_id(&self, ref_id: hir::HirId) -> Option<DefId> {
128 self.save_ctxt.lookup_def_id(ref_id)
131 pub fn dump_crate_info(&mut self, name: &str, krate: &hir::Crate<'_>) {
132 let source_file = self.tcx.sess.local_crate_source_file.as_ref();
133 let crate_root = source_file.map(|source_file| {
134 let source_file = Path::new(source_file);
135 match source_file.file_name() {
136 Some(_) => source_file.parent().unwrap().display(),
137 None => source_file.display(),
142 let data = CratePreludeData {
143 crate_id: GlobalCrateId {
148 .local_crate_disambiguator()
152 crate_root: crate_root.unwrap_or_else(|| "<no source>".to_owned()),
153 external_crates: self.save_ctxt.get_external_crates(),
154 span: self.span_from_span(krate.item.span),
157 self.dumper.crate_prelude(data);
160 pub fn dump_compilation_options(&mut self, input: &Input, crate_name: &str) {
161 // Apply possible `remap-path-prefix` remapping to the input source file
162 // (and don't include remapping args anymore)
163 let (program, arguments) = {
164 let remap_arg_indices = {
165 let mut indices = FxHashSet::default();
166 // Args are guaranteed to be valid UTF-8 (checked early)
167 for (i, e) in env::args().enumerate() {
168 if e.starts_with("--remap-path-prefix=") {
170 } else if e == "--remap-path-prefix" {
172 indices.insert(i + 1);
178 let mut args = env::args()
180 .filter(|(i, _)| !remap_arg_indices.contains(i))
181 .map(|(_, arg)| match input {
182 Input::File(ref path) if path == Path::new(&arg) => {
183 let mapped = &self.tcx.sess.local_crate_source_file;
184 mapped.as_ref().unwrap().to_string_lossy().into()
189 (args.next().unwrap(), args.collect())
192 let data = CompilationOptions {
193 directory: self.tcx.sess.working_dir.0.clone(),
196 output: self.save_ctxt.compilation_output(crate_name),
199 self.dumper.compilation_opts(data);
202 fn write_segments(&mut self, segments: impl IntoIterator<Item = &'tcx hir::PathSegment<'tcx>>) {
203 for seg in segments {
204 if let Some(data) = self.save_ctxt.get_path_segment_data(seg) {
205 self.dumper.dump_ref(data);
210 fn write_sub_paths(&mut self, path: &'tcx hir::Path<'tcx>) {
211 self.write_segments(path.segments)
214 // As write_sub_paths, but does not process the last ident in the path (assuming it
215 // will be processed elsewhere). See note on write_sub_paths about global.
216 fn write_sub_paths_truncated(&mut self, path: &'tcx hir::Path<'tcx>) {
217 if let [segments @ .., _] = path.segments {
218 self.write_segments(segments)
222 fn process_formals(&mut self, formals: &'tcx [hir::Param<'tcx>], qualname: &str) {
224 self.visit_pat(&arg.pat);
225 let mut collector = PathCollector::new(self.tcx);
226 collector.visit_pat(&arg.pat);
228 for (hir_id, ident, ..) in collector.collected_idents {
229 let typ = match self.save_ctxt.tables().node_type_opt(hir_id) {
230 Some(s) => s.to_string(),
233 if !self.span.filter_generated(ident.span) {
234 let id = id_from_hir_id(hir_id, &self.save_ctxt);
235 let span = self.span_from_span(ident.span);
237 self.dumper.dump_def(
238 &Access { public: false, reachable: false },
240 kind: DefKind::Local,
243 name: ident.to_string(),
244 qualname: format!("{}::{}", qualname, ident.to_string()),
261 sig: &'tcx hir::FnSig<'tcx>,
262 body: Option<hir::BodyId>,
265 generics: &'tcx hir::Generics<'tcx>,
266 vis: &hir::Visibility<'tcx>,
269 debug!("process_method: {}:{}", hir_id, ident);
271 let map = &self.tcx.hir();
272 self.nest_tables(map.local_def_id(hir_id), |v| {
273 if let Some(mut method_data) = v.save_ctxt.get_method_data(hir_id, ident, span) {
274 if let Some(body) = body {
275 v.process_formals(map.body(body).params, &method_data.qualname);
277 v.process_generic_params(&generics, &method_data.qualname, hir_id);
280 fn_to_string(sig.decl, sig.header, Some(ident.name), generics, vis, &[], None);
281 method_data.sig = sig::method_signature(hir_id, ident, generics, sig, &v.save_ctxt);
283 v.dumper.dump_def(&access_from_vis!(v.save_ctxt, vis, hir_id), method_data);
286 // walk arg and return types
287 for arg in sig.decl.inputs {
291 if let hir::FnRetTy::Return(ref ret_ty) = sig.decl.output {
296 if let Some(body) = body {
297 v.visit_expr(&map.body(body).value);
302 fn process_struct_field_def(
304 field: &'tcx hir::StructField<'tcx>,
305 parent_id: hir::HirId,
307 let field_data = self.save_ctxt.get_field_data(field, parent_id);
308 if let Some(field_data) = field_data {
309 self.dumper.dump_def(&access_from!(self.save_ctxt, field, field.hir_id), field_data);
313 // Dump generic params bindings, then visit_generics
314 fn process_generic_params(
316 generics: &'tcx hir::Generics<'tcx>,
320 for param in generics.params {
322 hir::GenericParamKind::Lifetime { .. } => {}
323 hir::GenericParamKind::Type { .. } => {
324 let param_ss = param.name.ident().span;
325 let name = escape(self.span.snippet(param_ss));
326 // Append $id to name to make sure each one is unique.
327 let qualname = format!("{}::{}${}", prefix, name, id);
328 if !self.span.filter_generated(param_ss) {
329 let id = id_from_hir_id(param.hir_id, &self.save_ctxt);
330 let span = self.span_from_span(param_ss);
332 self.dumper.dump_def(
333 &Access { public: false, reachable: false },
340 value: String::new(),
351 hir::GenericParamKind::Const { .. } => {}
354 self.visit_generics(generics);
359 item: &'tcx hir::Item<'tcx>,
360 decl: &'tcx hir::FnDecl<'tcx>,
361 _header: &'tcx hir::FnHeader,
362 ty_params: &'tcx hir::Generics<'tcx>,
365 let map = &self.tcx.hir();
366 self.nest_tables(map.local_def_id(item.hir_id), |v| {
367 let body = map.body(body);
368 if let Some(fn_data) = v.save_ctxt.get_item_data(item) {
369 down_cast_data!(fn_data, DefData, item.span);
370 v.process_formals(body.params, &fn_data.qualname);
371 v.process_generic_params(ty_params, &fn_data.qualname, item.hir_id);
373 v.dumper.dump_def(&access_from!(v.save_ctxt, item, item.hir_id), fn_data);
376 for arg in decl.inputs {
380 if let hir::FnRetTy::Return(ref ret_ty) = decl.output {
384 v.visit_expr(&body.value);
388 fn process_static_or_const_item(
390 item: &'tcx hir::Item<'tcx>,
391 typ: &'tcx hir::Ty<'tcx>,
392 expr: &'tcx hir::Expr<'tcx>,
394 self.nest_tables(self.tcx.hir().local_def_id(item.hir_id), |v| {
395 if let Some(var_data) = v.save_ctxt.get_item_data(item) {
396 down_cast_data!(var_data, DefData, item.span);
397 v.dumper.dump_def(&access_from!(v.save_ctxt, item, item.hir_id), var_data);
404 fn process_assoc_const(
408 typ: &'tcx hir::Ty<'tcx>,
409 expr: Option<&'tcx hir::Expr<'tcx>>,
411 vis: &hir::Visibility<'tcx>,
412 attrs: &'tcx [ast::Attribute],
415 format!("::{}", self.tcx.def_path_str(self.tcx.hir().local_def_id(hir_id).to_def_id()));
417 if !self.span.filter_generated(ident.span) {
418 let sig = sig::assoc_const_signature(hir_id, ident.name, typ, expr, &self.save_ctxt);
419 let span = self.span_from_span(ident.span);
421 self.dumper.dump_def(
422 &access_from_vis!(self.save_ctxt, vis, hir_id),
424 kind: DefKind::Const,
425 id: id_from_hir_id(hir_id, &self.save_ctxt),
427 name: ident.name.to_string(),
429 value: ty_to_string(&typ),
430 parent: Some(id_from_def_id(parent_id)),
433 docs: self.save_ctxt.docs_for_attrs(attrs),
435 attributes: lower_attributes(attrs.to_owned(), &self.save_ctxt),
440 // walk type and init value
441 self.nest_tables(self.tcx.hir().local_def_id(hir_id), |v| {
443 if let Some(expr) = expr {
449 // FIXME tuple structs should generate tuple-specific data.
452 item: &'tcx hir::Item<'tcx>,
453 def: &'tcx hir::VariantData<'tcx>,
454 ty_params: &'tcx hir::Generics<'tcx>,
456 debug!("process_struct {:?} {:?}", item, item.span);
457 let name = item.ident.to_string();
458 let qualname = format!(
460 self.tcx.def_path_str(self.tcx.hir().local_def_id(item.hir_id).to_def_id())
463 let kind = match item.kind {
464 hir::ItemKind::Struct(_, _) => DefKind::Struct,
465 hir::ItemKind::Union(_, _) => DefKind::Union,
469 let (value, fields) = match item.kind {
470 hir::ItemKind::Struct(hir::VariantData::Struct(ref fields, ..), ..)
471 | hir::ItemKind::Union(hir::VariantData::Struct(ref fields, ..), ..) => {
472 let include_priv_fields = !self.save_ctxt.config.pub_only;
473 let fields_str = fields
476 if include_priv_fields || f.vis.node.is_pub() {
477 Some(f.ident.to_string())
484 let value = format!("{} {{ {} }}", name, fields_str);
485 (value, fields.iter().map(|f| id_from_hir_id(f.hir_id, &self.save_ctxt)).collect())
487 _ => (String::new(), vec![]),
490 if !self.span.filter_generated(item.ident.span) {
491 let span = self.span_from_span(item.ident.span);
492 self.dumper.dump_def(
493 &access_from!(self.save_ctxt, item, item.hir_id),
496 id: id_from_hir_id(item.hir_id, &self.save_ctxt),
499 qualname: qualname.clone(),
504 docs: self.save_ctxt.docs_for_attrs(&item.attrs),
505 sig: sig::item_signature(item, &self.save_ctxt),
506 attributes: lower_attributes(item.attrs.to_vec(), &self.save_ctxt),
511 self.nest_tables(self.tcx.hir().local_def_id(item.hir_id), |v| {
512 for field in def.fields() {
513 v.process_struct_field_def(field, item.hir_id);
514 v.visit_ty(&field.ty);
517 v.process_generic_params(ty_params, &qualname, item.hir_id);
523 item: &'tcx hir::Item<'tcx>,
524 enum_definition: &'tcx hir::EnumDef<'tcx>,
525 ty_params: &'tcx hir::Generics<'tcx>,
527 let enum_data = self.save_ctxt.get_item_data(item);
528 let enum_data = match enum_data {
532 down_cast_data!(enum_data, DefData, item.span);
534 let access = access_from!(self.save_ctxt, item, item.hir_id);
536 for variant in enum_definition.variants {
537 let name = variant.ident.name.to_string();
538 let qualname = format!("{}::{}", enum_data.qualname, name);
539 let name_span = variant.ident.span;
542 hir::VariantData::Struct(ref fields, ..) => {
544 fields.iter().map(|f| f.ident.to_string()).collect::<Vec<_>>().join(", ");
545 let value = format!("{}::{} {{ {} }}", enum_data.name, name, fields_str);
546 if !self.span.filter_generated(name_span) {
547 let span = self.span_from_span(name_span);
548 let id = id_from_hir_id(variant.id, &self.save_ctxt);
549 let parent = Some(id_from_hir_id(item.hir_id, &self.save_ctxt));
551 self.dumper.dump_def(
554 kind: DefKind::StructVariant,
563 docs: self.save_ctxt.docs_for_attrs(&variant.attrs),
564 sig: sig::variant_signature(variant, &self.save_ctxt),
565 attributes: lower_attributes(
566 variant.attrs.to_vec(),
574 let mut value = format!("{}::{}", enum_data.name, name);
575 if let &hir::VariantData::Tuple(ref fields, _) = v {
580 .map(|f| ty_to_string(&f.ty))
586 if !self.span.filter_generated(name_span) {
587 let span = self.span_from_span(name_span);
588 let id = id_from_hir_id(variant.id, &self.save_ctxt);
589 let parent = Some(id_from_hir_id(item.hir_id, &self.save_ctxt));
591 self.dumper.dump_def(
594 kind: DefKind::TupleVariant,
603 docs: self.save_ctxt.docs_for_attrs(&variant.attrs),
604 sig: sig::variant_signature(variant, &self.save_ctxt),
605 attributes: lower_attributes(
606 variant.attrs.to_vec(),
615 for field in variant.data.fields() {
616 self.process_struct_field_def(field, variant.id);
617 self.visit_ty(field.ty);
620 self.process_generic_params(ty_params, &enum_data.qualname, item.hir_id);
621 self.dumper.dump_def(&access, enum_data);
626 item: &'tcx hir::Item<'tcx>,
627 generics: &'tcx hir::Generics<'tcx>,
628 trait_ref: &'tcx Option<hir::TraitRef<'tcx>>,
629 typ: &'tcx hir::Ty<'tcx>,
630 impl_items: &'tcx [hir::ImplItemRef<'tcx>],
632 if let Some(impl_data) = self.save_ctxt.get_item_data(item) {
633 if !self.span.filter_generated(item.span) {
634 if let super::Data::RelationData(rel, imp) = impl_data {
635 self.dumper.dump_relation(rel);
636 self.dumper.dump_impl(imp);
638 span_bug!(item.span, "unexpected data kind: {:?}", impl_data);
643 let map = &self.tcx.hir();
644 self.nest_tables(map.local_def_id(item.hir_id), |v| {
646 if let &Some(ref trait_ref) = trait_ref {
647 v.process_path(trait_ref.hir_ref_id, &hir::QPath::Resolved(None, &trait_ref.path));
649 v.process_generic_params(generics, "", item.hir_id);
650 for impl_item in impl_items {
652 map.impl_item(impl_item.id),
653 map.local_def_id(item.hir_id).to_def_id(),
661 item: &'tcx hir::Item<'tcx>,
662 generics: &'tcx hir::Generics<'tcx>,
663 trait_refs: hir::GenericBounds<'tcx>,
664 methods: &'tcx [hir::TraitItemRef],
666 let name = item.ident.to_string();
667 let qualname = format!(
669 self.tcx.def_path_str(self.tcx.hir().local_def_id(item.hir_id).to_def_id())
671 let mut val = name.clone();
672 if !generics.params.is_empty() {
673 val.push_str(&generic_params_to_string(generics.params));
675 if !trait_refs.is_empty() {
677 val.push_str(&bounds_to_string(trait_refs));
679 if !self.span.filter_generated(item.ident.span) {
680 let id = id_from_hir_id(item.hir_id, &self.save_ctxt);
681 let span = self.span_from_span(item.ident.span);
683 methods.iter().map(|i| id_from_hir_id(i.id.hir_id, &self.save_ctxt)).collect();
684 self.dumper.dump_def(
685 &access_from!(self.save_ctxt, item, item.hir_id),
687 kind: DefKind::Trait,
691 qualname: qualname.clone(),
696 docs: self.save_ctxt.docs_for_attrs(&item.attrs),
697 sig: sig::item_signature(item, &self.save_ctxt),
698 attributes: lower_attributes(item.attrs.to_vec(), &self.save_ctxt),
704 for super_bound in trait_refs.iter() {
705 let trait_ref = match *super_bound {
706 hir::GenericBound::Trait(ref trait_ref, _) => trait_ref,
707 hir::GenericBound::Outlives(..) => continue,
710 let trait_ref = &trait_ref.trait_ref;
711 if let Some(id) = self.lookup_def_id(trait_ref.hir_ref_id) {
712 let sub_span = trait_ref.path.segments.last().unwrap().ident.span;
713 if !self.span.filter_generated(sub_span) {
714 let span = self.span_from_span(sub_span);
715 self.dumper.dump_ref(Ref {
718 ref_id: id_from_def_id(id),
721 self.dumper.dump_relation(Relation {
722 kind: RelationKind::SuperTrait,
724 from: id_from_def_id(id),
725 to: id_from_hir_id(item.hir_id, &self.save_ctxt),
731 // walk generics and methods
732 self.process_generic_params(generics, &qualname, item.hir_id);
733 for method in methods {
734 let map = &self.tcx.hir();
735 self.process_trait_item(
736 map.trait_item(method.id),
737 map.local_def_id(item.hir_id).to_def_id(),
742 // `item` is the module in question, represented as an( item.
743 fn process_mod(&mut self, item: &'tcx hir::Item<'tcx>) {
744 if let Some(mod_data) = self.save_ctxt.get_item_data(item) {
745 down_cast_data!(mod_data, DefData, item.span);
746 self.dumper.dump_def(&access_from!(self.save_ctxt, item, item.hir_id), mod_data);
750 fn dump_path_ref(&mut self, id: hir::HirId, path: &hir::QPath<'tcx>) {
751 let path_data = self.save_ctxt.get_path_data(id, path);
752 if let Some(path_data) = path_data {
753 self.dumper.dump_ref(path_data);
757 fn dump_path_segment_ref(&mut self, id: hir::HirId, segment: &hir::PathSegment<'tcx>) {
758 let segment_data = self.save_ctxt.get_path_segment_data_with_id(segment, id);
759 if let Some(segment_data) = segment_data {
760 self.dumper.dump_ref(segment_data);
764 fn process_path(&mut self, id: hir::HirId, path: &hir::QPath<'tcx>) {
765 let span = match path {
766 hir::QPath::Resolved(_, path) => path.span,
767 hir::QPath::TypeRelative(_, segment) => segment.ident.span,
769 if self.span.filter_generated(span) {
772 self.dump_path_ref(id, path);
775 let segments = match path {
776 hir::QPath::Resolved(ty, path) => {
777 if let Some(ty) = ty {
782 hir::QPath::TypeRelative(ty, segment) => {
784 std::slice::from_ref(*segment)
787 for seg in segments {
788 if let Some(ref generic_args) = seg.args {
789 for arg in generic_args.args {
790 if let hir::GenericArg::Type(ref ty) = arg {
797 if let hir::QPath::Resolved(_, path) = path {
798 self.write_sub_paths_truncated(path);
802 fn process_struct_lit(
804 ex: &'tcx hir::Expr<'tcx>,
805 path: &'tcx hir::QPath<'tcx>,
806 fields: &'tcx [hir::Field<'tcx>],
807 variant: &'tcx ty::VariantDef,
808 base: Option<&'tcx hir::Expr<'tcx>>,
810 if let Some(struct_lit_data) = self.save_ctxt.get_expr_data(ex) {
811 if let hir::QPath::Resolved(_, path) = path {
812 self.write_sub_paths_truncated(path);
814 down_cast_data!(struct_lit_data, RefData, ex.span);
815 if !generated_code(ex.span) {
816 self.dumper.dump_ref(struct_lit_data);
819 for field in fields {
820 if let Some(field_data) = self.save_ctxt.get_field_ref_data(field, variant) {
821 self.dumper.dump_ref(field_data);
824 self.visit_expr(&field.expr)
828 walk_list!(self, visit_expr, base);
831 fn process_method_call(
833 ex: &'tcx hir::Expr<'tcx>,
834 seg: &'tcx hir::PathSegment<'tcx>,
835 args: &'tcx [hir::Expr<'tcx>],
837 debug!("process_method_call {:?} {:?}", ex, ex.span);
838 if let Some(mcd) = self.save_ctxt.get_expr_data(ex) {
839 down_cast_data!(mcd, RefData, ex.span);
840 if !generated_code(ex.span) {
841 self.dumper.dump_ref(mcd);
845 // Explicit types in the turbo-fish.
846 if let Some(generic_args) = seg.args {
847 for arg in generic_args.args {
848 if let hir::GenericArg::Type(ty) = arg {
854 // walk receiver and args
855 walk_list!(self, visit_expr, args);
858 fn process_pat(&mut self, p: &'tcx hir::Pat<'tcx>) {
860 hir::PatKind::Struct(ref _path, fields, _) => {
861 // FIXME do something with _path?
862 let adt = match self.save_ctxt.tables().node_type_opt(p.hir_id) {
863 Some(ty) if ty.ty_adt_def().is_some() => ty.ty_adt_def().unwrap(),
865 intravisit::walk_pat(self, p);
869 let variant = adt.variant_of_res(self.save_ctxt.get_path_res(p.hir_id));
871 for field in fields {
872 if let Some(index) = self.tcx.find_field_index(field.ident, variant) {
873 if !self.span.filter_generated(field.ident.span) {
874 let span = self.span_from_span(field.ident.span);
875 self.dumper.dump_ref(Ref {
876 kind: RefKind::Variable,
878 ref_id: id_from_def_id(variant.fields[index].did),
882 self.visit_pat(&field.pat);
885 _ => intravisit::walk_pat(self, p),
889 fn process_var_decl(&mut self, pat: &'tcx hir::Pat<'tcx>) {
890 // The pattern could declare multiple new vars,
891 // we must walk the pattern and collect them all.
892 let mut collector = PathCollector::new(self.tcx);
893 collector.visit_pat(&pat);
894 self.visit_pat(&pat);
896 // Process collected paths.
897 for (id, ident, _) in collector.collected_idents {
898 let res = self.save_ctxt.get_path_res(id);
900 Res::Local(hir_id) => {
904 .node_type_opt(hir_id)
905 .map(|t| t.to_string())
906 .unwrap_or_default();
908 // Rust uses the id of the pattern for var lookups, so we'll use it too.
909 if !self.span.filter_generated(ident.span) {
910 let qualname = format!("{}${}", ident.to_string(), hir_id);
911 let id = id_from_hir_id(hir_id, &self.save_ctxt);
912 let span = self.span_from_span(ident.span);
914 self.dumper.dump_def(
915 &Access { public: false, reachable: false },
917 kind: DefKind::Local,
920 name: ident.to_string(),
936 | HirDefKind::AssocConst
938 | HirDefKind::Variant
939 | HirDefKind::TyAlias
940 | HirDefKind::AssocTy,
943 | Res::SelfTy(..) => {
944 self.dump_path_segment_ref(id, &hir::PathSegment::from_ident(ident));
947 error!("unexpected definition kind when processing collected idents: {:?}", def)
952 for (id, ref path) in collector.collected_paths {
953 self.process_path(id, path);
957 /// Extracts macro use and definition information from the AST node defined
958 /// by the given NodeId, using the expansion information from the node's
961 /// If the span is not macro-generated, do nothing, else use callee and
962 /// callsite spans to record macro definition and use data, using the
963 /// mac_uses and mac_defs sets to prevent multiples.
964 fn process_macro_use(&mut self, _span: Span) {
965 // FIXME if we're not dumping the defs (see below), there is no point
966 // dumping refs either.
967 // let source_span = span.source_callsite();
968 // if !self.macro_calls.insert(source_span) {
972 // let data = match self.save_ctxt.get_macro_use_data(span) {
974 // Some(data) => data,
977 // self.dumper.macro_use(data);
979 // FIXME write the macro def
980 // let mut hasher = DefaultHasher::new();
981 // data.callee_span.hash(&mut hasher);
982 // let hash = hasher.finish();
983 // let qualname = format!("{}::{}", data.name, hash);
984 // Don't write macro definition for imported macros
985 // if !self.mac_defs.contains(&data.callee_span)
986 // && !data.imported {
987 // self.mac_defs.insert(data.callee_span);
988 // if let Some(sub_span) = self.span.span_for_macro_def_name(data.callee_span) {
989 // self.dumper.macro_data(MacroData {
991 // name: data.name.clone(),
992 // qualname: qualname.clone(),
993 // // FIXME where do macro docs come from?
994 // docs: String::new(),
995 // }.lower(self.tcx));
1000 fn process_trait_item(&mut self, trait_item: &'tcx hir::TraitItem<'tcx>, trait_id: DefId) {
1001 self.process_macro_use(trait_item.span);
1002 let vis_span = trait_item.span.shrink_to_lo();
1003 match trait_item.kind {
1004 hir::TraitItemKind::Const(ref ty, body) => {
1005 let body = body.map(|b| &self.tcx.hir().body(b).value);
1006 let respan = respan(vis_span, hir::VisibilityKind::Public);
1007 self.process_assoc_const(
1017 hir::TraitItemKind::Fn(ref sig, ref trait_fn) => {
1019 if let hir::TraitFn::Provided(body) = trait_fn { Some(*body) } else { None };
1020 let respan = respan(vis_span, hir::VisibilityKind::Public);
1021 self.process_method(
1026 &trait_item.generics,
1031 hir::TraitItemKind::Type(ref bounds, ref default_ty) => {
1032 // FIXME do something with _bounds (for type refs)
1033 let name = trait_item.ident.name.to_string();
1034 let qualname = format!(
1037 .def_path_str(self.tcx.hir().local_def_id(trait_item.hir_id).to_def_id())
1040 if !self.span.filter_generated(trait_item.ident.span) {
1041 let span = self.span_from_span(trait_item.ident.span);
1042 let id = id_from_hir_id(trait_item.hir_id, &self.save_ctxt);
1044 self.dumper.dump_def(
1045 &Access { public: true, reachable: true },
1047 kind: DefKind::Type,
1052 value: self.span.snippet(trait_item.span),
1053 parent: Some(id_from_def_id(trait_id)),
1056 docs: self.save_ctxt.docs_for_attrs(&trait_item.attrs),
1057 sig: sig::assoc_type_signature(
1061 default_ty.as_ref().map(|ty| &**ty),
1064 attributes: lower_attributes(
1065 trait_item.attrs.to_vec(),
1072 if let &Some(ref default_ty) = default_ty {
1073 self.visit_ty(default_ty)
1079 fn process_impl_item(&mut self, impl_item: &'tcx hir::ImplItem<'tcx>, impl_id: DefId) {
1080 self.process_macro_use(impl_item.span);
1081 match impl_item.kind {
1082 hir::ImplItemKind::Const(ref ty, body) => {
1083 let body = self.tcx.hir().body(body);
1084 self.process_assoc_const(
1094 hir::ImplItemKind::Fn(ref sig, body) => {
1095 self.process_method(
1100 &impl_item.generics,
1105 hir::ImplItemKind::TyAlias(ref ty) => {
1106 // FIXME: uses of the assoc type should ideally point to this
1107 // 'def' and the name here should be a ref to the def in the
1114 pub(crate) fn process_crate(&mut self, krate: &'tcx hir::Crate<'tcx>) {
1115 let id = hir::CRATE_HIR_ID;
1117 format!("::{}", self.tcx.def_path_str(self.tcx.hir().local_def_id(id).to_def_id()));
1119 let sm = self.tcx.sess.source_map();
1120 let filename = sm.span_to_filename(krate.item.span);
1121 let data_id = id_from_hir_id(id, &self.save_ctxt);
1122 let children = krate
1127 .map(|i| id_from_hir_id(i.id, &self.save_ctxt))
1129 let span = self.span_from_span(krate.item.span);
1131 self.dumper.dump_def(
1132 &Access { public: true, reachable: true },
1136 name: String::new(),
1139 value: filename.to_string(),
1143 docs: self.save_ctxt.docs_for_attrs(krate.item.attrs),
1145 attributes: lower_attributes(krate.item.attrs.to_owned(), &self.save_ctxt),
1148 intravisit::walk_crate(self, krate);
1151 fn process_bounds(&mut self, bounds: hir::GenericBounds<'tcx>) {
1152 for bound in bounds {
1153 if let hir::GenericBound::Trait(ref trait_ref, _) = *bound {
1155 trait_ref.trait_ref.hir_ref_id,
1156 &hir::QPath::Resolved(None, &trait_ref.trait_ref.path),
1163 impl<'tcx> Visitor<'tcx> for DumpVisitor<'tcx> {
1164 type Map = Map<'tcx>;
1166 fn nested_visit_map(&mut self) -> intravisit::NestedVisitorMap<Self::Map> {
1167 intravisit::NestedVisitorMap::All(self.tcx.hir())
1170 fn visit_item(&mut self, item: &'tcx hir::Item<'tcx>) {
1171 self.process_macro_use(item.span);
1173 hir::ItemKind::Use(path, hir::UseKind::Single) => {
1174 let sub_span = path.segments.last().unwrap().ident.span;
1175 if !self.span.filter_generated(sub_span) {
1176 let access = access_from!(self.save_ctxt, item, item.hir_id);
1177 let ref_id = self.lookup_def_id(item.hir_id).map(id_from_def_id);
1178 let span = self.span_from_span(sub_span);
1183 .opt_local_def_id(item.hir_id)
1184 .and_then(|id| self.save_ctxt.tcx.parent(id.to_def_id()))
1185 .map(id_from_def_id);
1189 kind: ImportKind::Use,
1193 name: item.ident.to_string(),
1194 value: String::new(),
1198 self.write_sub_paths_truncated(&path);
1201 hir::ItemKind::Use(path, hir::UseKind::Glob) => {
1202 // Make a comma-separated list of names of imported modules.
1203 let def_id = self.tcx.hir().local_def_id(item.hir_id);
1204 let names = self.tcx.names_imported_by_glob_use(def_id);
1205 let names: Vec<_> = names.iter().map(|n| n.to_string()).collect();
1207 // Otherwise it's a span with wrong macro expansion info, which
1208 // we don't want to track anyway, since it's probably macro-internal `use`
1209 if let Some(sub_span) =
1210 self.span.sub_span_of_token(item.span, token::BinOp(token::Star))
1212 if !self.span.filter_generated(item.span) {
1213 let access = access_from!(self.save_ctxt, item, item.hir_id);
1214 let span = self.span_from_span(sub_span);
1219 .opt_local_def_id(item.hir_id)
1220 .and_then(|id| self.save_ctxt.tcx.parent(id.to_def_id()))
1221 .map(id_from_def_id);
1225 kind: ImportKind::GlobUse,
1229 name: "*".to_owned(),
1230 value: names.join(", "),
1234 self.write_sub_paths(&path);
1238 hir::ItemKind::ExternCrate(_) => {
1239 let name_span = item.ident.span;
1240 if !self.span.filter_generated(name_span) {
1241 let span = self.span_from_span(name_span);
1246 .opt_local_def_id(item.hir_id)
1247 .and_then(|id| self.save_ctxt.tcx.parent(id.to_def_id()))
1248 .map(id_from_def_id);
1250 &Access { public: false, reachable: false },
1252 kind: ImportKind::ExternCrate,
1256 name: item.ident.to_string(),
1257 value: String::new(),
1263 hir::ItemKind::Fn(ref sig, ref ty_params, body) => {
1264 self.process_fn(item, sig.decl, &sig.header, ty_params, body)
1266 hir::ItemKind::Static(ref typ, _, body) => {
1267 let body = self.tcx.hir().body(body);
1268 self.process_static_or_const_item(item, typ, &body.value)
1270 hir::ItemKind::Const(ref typ, body) => {
1271 let body = self.tcx.hir().body(body);
1272 self.process_static_or_const_item(item, typ, &body.value)
1274 hir::ItemKind::Struct(ref def, ref ty_params)
1275 | hir::ItemKind::Union(ref def, ref ty_params) => {
1276 self.process_struct(item, def, ty_params)
1278 hir::ItemKind::Enum(ref def, ref ty_params) => self.process_enum(item, def, ty_params),
1279 hir::ItemKind::Impl { ref generics, ref of_trait, ref self_ty, ref items, .. } => {
1280 self.process_impl(item, generics, of_trait, &self_ty, items)
1282 hir::ItemKind::Trait(_, _, ref generics, ref trait_refs, methods) => {
1283 self.process_trait(item, generics, trait_refs, methods)
1285 hir::ItemKind::Mod(ref m) => {
1286 self.process_mod(item);
1287 intravisit::walk_mod(self, m, item.hir_id);
1289 hir::ItemKind::TyAlias(ty, ref generics) => {
1290 let qualname = format!(
1292 self.tcx.def_path_str(self.tcx.hir().local_def_id(item.hir_id).to_def_id())
1294 let value = ty_to_string(&ty);
1295 if !self.span.filter_generated(item.ident.span) {
1296 let span = self.span_from_span(item.ident.span);
1297 let id = id_from_hir_id(item.hir_id, &self.save_ctxt);
1299 self.dumper.dump_def(
1300 &access_from!(self.save_ctxt, item, item.hir_id),
1302 kind: DefKind::Type,
1305 name: item.ident.to_string(),
1306 qualname: qualname.clone(),
1311 docs: self.save_ctxt.docs_for_attrs(&item.attrs),
1312 sig: sig::item_signature(item, &self.save_ctxt),
1313 attributes: lower_attributes(item.attrs.to_vec(), &self.save_ctxt),
1319 self.process_generic_params(generics, &qualname, item.hir_id);
1321 _ => intravisit::walk_item(self, item),
1325 fn visit_generics(&mut self, generics: &'tcx hir::Generics<'tcx>) {
1326 for param in generics.params {
1328 hir::GenericParamKind::Lifetime { .. } => {}
1329 hir::GenericParamKind::Type { ref default, .. } => {
1330 self.process_bounds(param.bounds);
1331 if let Some(ref ty) = default {
1335 hir::GenericParamKind::Const { ref ty } => {
1336 self.process_bounds(param.bounds);
1341 for pred in generics.where_clause.predicates {
1342 if let hir::WherePredicate::BoundPredicate(ref wbp) = *pred {
1343 self.process_bounds(wbp.bounds);
1344 self.visit_ty(wbp.bounded_ty);
1349 fn visit_ty(&mut self, t: &'tcx hir::Ty<'tcx>) {
1350 self.process_macro_use(t.span);
1352 hir::TyKind::Path(ref path) => {
1353 if generated_code(t.span) {
1357 if let Some(id) = self.lookup_def_id(t.hir_id) {
1358 let sub_span = match path {
1359 hir::QPath::Resolved(_, path) => path.segments.last().unwrap().ident.span,
1360 hir::QPath::TypeRelative(_, segment) => segment.ident.span,
1362 let span = self.span_from_span(sub_span);
1363 self.dumper.dump_ref(Ref {
1364 kind: RefKind::Type,
1366 ref_id: id_from_def_id(id),
1370 if let hir::QPath::Resolved(_, path) = path {
1371 self.write_sub_paths_truncated(path);
1373 intravisit::walk_qpath(self, path, t.hir_id, t.span);
1375 hir::TyKind::Array(ref ty, ref anon_const) => {
1377 let map = self.tcx.hir();
1378 self.nest_tables(self.tcx.hir().local_def_id(anon_const.hir_id), |v| {
1379 v.visit_expr(&map.body(anon_const.body).value)
1382 hir::TyKind::OpaqueDef(item_id, _) => {
1383 let item = self.tcx.hir().item(item_id.id);
1384 self.nest_tables(self.tcx.hir().local_def_id(item_id.id), |v| v.visit_item(item));
1386 _ => intravisit::walk_ty(self, t),
1390 fn visit_expr(&mut self, ex: &'tcx hir::Expr<'tcx>) {
1391 debug!("visit_expr {:?}", ex.kind);
1392 self.process_macro_use(ex.span);
1394 hir::ExprKind::Struct(ref path, ref fields, ref base) => {
1395 let hir_expr = self.save_ctxt.tcx.hir().expect_expr(ex.hir_id);
1396 let adt = match self.save_ctxt.tables().expr_ty_opt(&hir_expr) {
1397 Some(ty) if ty.ty_adt_def().is_some() => ty.ty_adt_def().unwrap(),
1399 intravisit::walk_expr(self, ex);
1403 let res = self.save_ctxt.get_path_res(hir_expr.hir_id);
1404 self.process_struct_lit(ex, path, fields, adt.variant_of_res(res), *base)
1406 hir::ExprKind::MethodCall(ref seg, _, args, _) => {
1407 self.process_method_call(ex, seg, args)
1409 hir::ExprKind::Field(ref sub_ex, _) => {
1410 self.visit_expr(&sub_ex);
1412 if let Some(field_data) = self.save_ctxt.get_expr_data(ex) {
1413 down_cast_data!(field_data, RefData, ex.span);
1414 if !generated_code(ex.span) {
1415 self.dumper.dump_ref(field_data);
1419 hir::ExprKind::Closure(_, ref decl, body, _fn_decl_span, _) => {
1420 let id = format!("${}", ex.hir_id);
1422 // walk arg and return types
1423 for ty in decl.inputs {
1427 if let hir::FnRetTy::Return(ref ret_ty) = decl.output {
1428 self.visit_ty(ret_ty);
1432 let map = self.tcx.hir();
1433 self.nest_tables(self.tcx.hir().local_def_id(ex.hir_id), |v| {
1434 let body = map.body(body);
1435 v.process_formals(body.params, &id);
1436 v.visit_expr(&body.value)
1439 hir::ExprKind::Repeat(ref expr, ref anon_const) => {
1440 self.visit_expr(expr);
1441 let map = self.tcx.hir();
1442 self.nest_tables(self.tcx.hir().local_def_id(anon_const.hir_id), |v| {
1443 v.visit_expr(&map.body(anon_const.body).value)
1446 // In particular, we take this branch for call and path expressions,
1447 // where we'll index the idents involved just by continuing to walk.
1448 _ => intravisit::walk_expr(self, ex),
1452 fn visit_pat(&mut self, p: &'tcx hir::Pat<'tcx>) {
1453 self.process_macro_use(p.span);
1454 self.process_pat(p);
1457 fn visit_arm(&mut self, arm: &'tcx hir::Arm<'tcx>) {
1458 self.process_var_decl(&arm.pat);
1459 if let Some(hir::Guard::If(expr)) = &arm.guard {
1460 self.visit_expr(expr);
1462 self.visit_expr(&arm.body);
1465 fn visit_qpath(&mut self, path: &'tcx hir::QPath<'tcx>, id: hir::HirId, _: Span) {
1466 self.process_path(id, path);
1469 fn visit_stmt(&mut self, s: &'tcx hir::Stmt<'tcx>) {
1470 self.process_macro_use(s.span);
1471 intravisit::walk_stmt(self, s)
1474 fn visit_local(&mut self, l: &'tcx hir::Local<'tcx>) {
1475 self.process_macro_use(l.span);
1476 self.process_var_decl(&l.pat);
1478 // Just walk the initialiser and type (don't want to walk the pattern again).
1479 walk_list!(self, visit_ty, &l.ty);
1480 walk_list!(self, visit_expr, &l.init);
1483 fn visit_foreign_item(&mut self, item: &'tcx hir::ForeignItem<'tcx>) {
1484 let access = access_from!(self.save_ctxt, item, item.hir_id);
1487 hir::ForeignItemKind::Fn(decl, _, ref generics) => {
1488 if let Some(fn_data) = self.save_ctxt.get_extern_item_data(item) {
1489 down_cast_data!(fn_data, DefData, item.span);
1491 self.process_generic_params(generics, &fn_data.qualname, item.hir_id);
1492 self.dumper.dump_def(&access, fn_data);
1495 for ty in decl.inputs {
1499 if let hir::FnRetTy::Return(ref ret_ty) = decl.output {
1500 self.visit_ty(ret_ty);
1503 hir::ForeignItemKind::Static(ref ty, _) => {
1504 if let Some(var_data) = self.save_ctxt.get_extern_item_data(item) {
1505 down_cast_data!(var_data, DefData, item.span);
1506 self.dumper.dump_def(&access, var_data);
1511 hir::ForeignItemKind::Type => {
1512 if let Some(var_data) = self.save_ctxt.get_extern_item_data(item) {
1513 down_cast_data!(var_data, DefData, item.span);
1514 self.dumper.dump_def(&access, var_data);