1 //! File symbol extraction.
3 use base_db::FileRange;
5 item_tree::ItemTreeNode, src::HasSource, AdtId, AssocItemId, AssocItemLoc, DefWithBodyId,
6 HasModule, ImplId, ItemContainerId, Lookup, MacroId, ModuleDefId, ModuleId, TraitId,
8 use hir_expand::{HirFileId, InFile};
9 use hir_ty::db::HirDatabase;
10 use syntax::{ast::HasName, AstNode, SmolStr, SyntaxNode, SyntaxNodePtr};
12 use crate::{Module, Semantics};
14 /// The actual data that is stored in the index. It should be as compact as
16 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
17 pub struct FileSymbol {
19 pub loc: DeclarationLocation,
20 pub kind: FileSymbolKind,
21 pub container_name: Option<SmolStr>,
24 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
25 pub struct DeclarationLocation {
26 /// The file id for both the `ptr` and `name_ptr`.
27 pub hir_file_id: HirFileId,
28 /// This points to the whole syntax node of the declaration.
29 pub ptr: SyntaxNodePtr,
30 /// This points to the [`syntax::ast::Name`] identifier of the declaration.
31 pub name_ptr: SyntaxNodePtr,
34 impl DeclarationLocation {
35 pub fn syntax<DB: HirDatabase>(&self, sema: &Semantics<'_, DB>) -> Option<SyntaxNode> {
36 let root = sema.parse_or_expand(self.hir_file_id)?;
37 Some(self.ptr.to_node(&root))
40 pub fn original_range(&self, db: &dyn HirDatabase) -> Option<FileRange> {
41 let node = resolve_node(db, self.hir_file_id, &self.ptr)?;
42 Some(node.as_ref().original_file_range(db.upcast()))
45 pub fn original_name_range(&self, db: &dyn HirDatabase) -> Option<FileRange> {
46 let node = resolve_node(db, self.hir_file_id, &self.name_ptr)?;
47 node.as_ref().original_file_range_opt(db.upcast())
55 ) -> Option<InFile<SyntaxNode>> {
56 let root = db.parse_or_expand(file_id)?;
57 let node = ptr.to_node(&root);
58 Some(InFile::new(file_id, node))
61 #[derive(PartialEq, Eq, Hash, Clone, Copy, Debug)]
62 pub enum FileSymbolKind {
76 pub fn is_type(self: FileSymbolKind) -> bool {
79 FileSymbolKind::Struct
80 | FileSymbolKind::Enum
81 | FileSymbolKind::Trait
82 | FileSymbolKind::TypeAlias
83 | FileSymbolKind::Union
88 /// Represents an outstanding module that the symbol collector must collect symbols from.
89 struct SymbolCollectorWork {
91 parent: Option<DefWithBodyId>,
94 pub struct SymbolCollector<'a> {
95 db: &'a dyn HirDatabase,
96 symbols: Vec<FileSymbol>,
97 work: Vec<SymbolCollectorWork>,
98 current_container_name: Option<SmolStr>,
101 /// Given a [`ModuleId`] and a [`HirDatabase`], use the DefMap for the module's crate to collect
102 /// all symbols that should be indexed for the given module.
103 impl<'a> SymbolCollector<'a> {
104 pub fn collect(db: &dyn HirDatabase, module: Module) -> Vec<FileSymbol> {
105 let mut symbol_collector = SymbolCollector {
107 symbols: Default::default(),
108 current_container_name: None,
109 // The initial work is the root module we're collecting, additional work will
110 // be populated as we traverse the module's definitions.
111 work: vec![SymbolCollectorWork { module_id: module.into(), parent: None }],
114 while let Some(work) = symbol_collector.work.pop() {
115 symbol_collector.do_work(work);
118 symbol_collector.symbols
121 fn do_work(&mut self, work: SymbolCollectorWork) {
122 self.db.unwind_if_cancelled();
124 let parent_name = work.parent.and_then(|id| self.def_with_body_id_name(id));
125 self.with_container_name(parent_name, |s| s.collect_from_module(work.module_id));
128 fn collect_from_module(&mut self, module_id: ModuleId) {
129 let def_map = module_id.def_map(self.db.upcast());
130 let scope = &def_map[module_id.local_id].scope;
132 for module_def_id in scope.declarations() {
133 match module_def_id {
134 ModuleDefId::ModuleId(id) => self.push_module(id),
135 ModuleDefId::FunctionId(id) => {
136 self.push_decl_assoc(id, FileSymbolKind::Function);
137 self.collect_from_body(id);
139 ModuleDefId::AdtId(AdtId::StructId(id)) => {
140 self.push_decl(id, FileSymbolKind::Struct)
142 ModuleDefId::AdtId(AdtId::EnumId(id)) => self.push_decl(id, FileSymbolKind::Enum),
143 ModuleDefId::AdtId(AdtId::UnionId(id)) => self.push_decl(id, FileSymbolKind::Union),
144 ModuleDefId::ConstId(id) => {
145 self.push_decl_assoc(id, FileSymbolKind::Const);
146 self.collect_from_body(id);
148 ModuleDefId::StaticId(id) => {
149 self.push_decl_assoc(id, FileSymbolKind::Static);
150 self.collect_from_body(id);
152 ModuleDefId::TraitId(id) => {
153 self.push_decl(id, FileSymbolKind::Trait);
154 self.collect_from_trait(id);
156 ModuleDefId::TypeAliasId(id) => {
157 self.push_decl_assoc(id, FileSymbolKind::TypeAlias);
159 ModuleDefId::MacroId(id) => match id {
160 MacroId::Macro2Id(id) => self.push_decl(id, FileSymbolKind::Macro),
161 MacroId::MacroRulesId(id) => self.push_decl(id, FileSymbolKind::Macro),
162 MacroId::ProcMacroId(id) => self.push_decl(id, FileSymbolKind::Macro),
164 // Don't index these.
165 ModuleDefId::BuiltinType(_) => {}
166 ModuleDefId::EnumVariantId(_) => {}
170 for impl_id in scope.impls() {
171 self.collect_from_impl(impl_id);
174 for const_id in scope.unnamed_consts() {
175 self.collect_from_body(const_id);
178 for (_, id) in scope.legacy_macros() {
180 if id.module(self.db.upcast()) == module_id {
182 MacroId::Macro2Id(id) => self.push_decl(id, FileSymbolKind::Macro),
183 MacroId::MacroRulesId(id) => self.push_decl(id, FileSymbolKind::Macro),
184 MacroId::ProcMacroId(id) => self.push_decl(id, FileSymbolKind::Macro),
191 fn collect_from_body(&mut self, body_id: impl Into<DefWithBodyId>) {
192 let body_id = body_id.into();
193 let body = self.db.body(body_id);
195 // Descend into the blocks and enqueue collection of all modules within.
196 for (_, def_map) in body.blocks(self.db.upcast()) {
197 for (id, _) in def_map.modules() {
198 self.work.push(SymbolCollectorWork {
199 module_id: def_map.module_id(id),
200 parent: Some(body_id),
206 fn collect_from_impl(&mut self, impl_id: ImplId) {
207 let impl_data = self.db.impl_data(impl_id);
208 for &assoc_item_id in &impl_data.items {
209 self.push_assoc_item(assoc_item_id)
213 fn collect_from_trait(&mut self, trait_id: TraitId) {
214 let trait_data = self.db.trait_data(trait_id);
215 self.with_container_name(trait_data.name.as_text(), |s| {
216 for &(_, assoc_item_id) in &trait_data.items {
217 s.push_assoc_item(assoc_item_id);
222 fn with_container_name(&mut self, container_name: Option<SmolStr>, f: impl FnOnce(&mut Self)) {
223 if let Some(container_name) = container_name {
224 let prev = self.current_container_name.replace(container_name);
226 self.current_container_name = prev;
232 fn current_container_name(&self) -> Option<SmolStr> {
233 self.current_container_name.clone()
236 fn def_with_body_id_name(&self, body_id: DefWithBodyId) -> Option<SmolStr> {
238 DefWithBodyId::FunctionId(id) => Some(
239 id.lookup(self.db.upcast()).source(self.db.upcast()).value.name()?.text().into(),
241 DefWithBodyId::StaticId(id) => Some(
242 id.lookup(self.db.upcast()).source(self.db.upcast()).value.name()?.text().into(),
244 DefWithBodyId::ConstId(id) => Some(
245 id.lookup(self.db.upcast()).source(self.db.upcast()).value.name()?.text().into(),
250 fn push_assoc_item(&mut self, assoc_item_id: AssocItemId) {
251 match assoc_item_id {
252 AssocItemId::FunctionId(id) => self.push_decl_assoc(id, FileSymbolKind::Function),
253 AssocItemId::ConstId(id) => self.push_decl_assoc(id, FileSymbolKind::Const),
254 AssocItemId::TypeAliasId(id) => self.push_decl_assoc(id, FileSymbolKind::TypeAlias),
258 fn push_decl_assoc<L, T>(&mut self, id: L, kind: FileSymbolKind)
260 L: Lookup<Data = AssocItemLoc<T>>,
262 <T as ItemTreeNode>::Source: HasName,
264 fn container_name(db: &dyn HirDatabase, container: ItemContainerId) -> Option<SmolStr> {
266 ItemContainerId::ModuleId(module_id) => {
267 let module = Module::from(module_id);
268 module.name(db).and_then(|name| name.as_text())
270 ItemContainerId::TraitId(trait_id) => {
271 let trait_data = db.trait_data(trait_id);
272 trait_data.name.as_text()
274 ItemContainerId::ImplId(_) | ItemContainerId::ExternBlockId(_) => None,
278 self.push_file_symbol(|s| {
279 let loc = id.lookup(s.db.upcast());
280 let source = loc.source(s.db.upcast());
281 let name_node = source.value.name()?;
283 container_name(s.db, loc.container).or_else(|| s.current_container_name());
286 name: name_node.text().into(),
289 loc: DeclarationLocation {
290 hir_file_id: source.file_id,
291 ptr: SyntaxNodePtr::new(source.value.syntax()),
292 name_ptr: SyntaxNodePtr::new(name_node.syntax()),
298 fn push_decl<L>(&mut self, id: L, kind: FileSymbolKind)
301 <L as Lookup>::Data: HasSource,
302 <<L as Lookup>::Data as HasSource>::Value: HasName,
304 self.push_file_symbol(|s| {
305 let loc = id.lookup(s.db.upcast());
306 let source = loc.source(s.db.upcast());
307 let name_node = source.value.name()?;
310 name: name_node.text().into(),
312 container_name: s.current_container_name(),
313 loc: DeclarationLocation {
314 hir_file_id: source.file_id,
315 ptr: SyntaxNodePtr::new(source.value.syntax()),
316 name_ptr: SyntaxNodePtr::new(name_node.syntax()),
322 fn push_module(&mut self, module_id: ModuleId) {
323 self.push_file_symbol(|s| {
324 let def_map = module_id.def_map(s.db.upcast());
325 let module_data = &def_map[module_id.local_id];
326 let declaration = module_data.origin.declaration()?;
327 let module = declaration.to_node(s.db.upcast());
328 let name_node = module.name()?;
331 name: name_node.text().into(),
332 kind: FileSymbolKind::Module,
333 container_name: s.current_container_name(),
334 loc: DeclarationLocation {
335 hir_file_id: declaration.file_id,
336 ptr: SyntaxNodePtr::new(module.syntax()),
337 name_ptr: SyntaxNodePtr::new(name_node.syntax()),
343 fn push_file_symbol(&mut self, f: impl FnOnce(&Self) -> Option<FileSymbol>) {
344 if let Some(file_symbol) = f(self) {
345 self.symbols.push(file_symbol);