1 //! Contains basic data about various HIR declarations.
5 use hir_expand::{name::Name, InFile};
12 item_tree::{AssocItem, FunctionQualifier, ItemTreeId, ModItem},
13 type_ref::{TypeBound, TypeRef},
14 visibility::RawVisibility,
15 AssocContainerId, AssocItemId, ConstId, ConstLoc, FunctionId, FunctionLoc, HasModule, ImplId,
16 Intern, Lookup, ModuleId, StaticId, TraitId, TypeAliasId, TypeAliasLoc,
19 #[derive(Debug, Clone, PartialEq, Eq)]
20 pub struct FunctionData {
22 pub params: Vec<TypeRef>,
23 pub ret_type: TypeRef,
25 /// True if the first param is `self`. This is relevant to decide whether this
26 /// can be called as a method.
27 pub has_self_param: bool,
29 pub qualifier: FunctionQualifier,
30 pub is_in_extern_block: bool,
32 pub visibility: RawVisibility,
36 pub(crate) fn fn_data_query(db: &dyn DefDatabase, func: FunctionId) -> Arc<FunctionData> {
37 let loc = func.lookup(db);
38 let krate = loc.container.module(db).krate;
39 let item_tree = db.item_tree(loc.id.file_id);
40 let func = &item_tree[loc.id.value];
42 Arc::new(FunctionData {
43 name: func.name.clone(),
44 params: func.params.iter().map(|id| item_tree[*id].clone()).collect(),
45 ret_type: item_tree[func.ret_type].clone(),
46 attrs: item_tree.attrs(db, krate, ModItem::from(loc.id.value).into()),
47 has_self_param: func.has_self_param,
48 has_body: func.has_body,
49 qualifier: func.qualifier.clone(),
50 is_in_extern_block: func.is_in_extern_block,
51 is_varargs: func.is_varargs,
52 visibility: item_tree[func.visibility].clone(),
57 #[derive(Debug, Clone, PartialEq, Eq)]
58 pub struct TypeAliasData {
60 pub type_ref: Option<TypeRef>,
61 pub visibility: RawVisibility,
63 /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
64 pub bounds: Vec<TypeBound>,
68 pub(crate) fn type_alias_data_query(
71 ) -> Arc<TypeAliasData> {
72 let loc = typ.lookup(db);
73 let item_tree = db.item_tree(loc.id.file_id);
74 let typ = &item_tree[loc.id.value];
76 Arc::new(TypeAliasData {
77 name: typ.name.clone(),
78 type_ref: typ.type_ref.map(|id| item_tree[id].clone()),
79 visibility: item_tree[typ.visibility].clone(),
80 is_extern: typ.is_extern,
81 bounds: typ.bounds.to_vec(),
86 #[derive(Debug, Clone, PartialEq, Eq)]
87 pub struct TraitData {
89 pub items: Vec<(Name, AssocItemId)>,
92 pub visibility: RawVisibility,
93 pub bounds: Box<[TypeBound]>,
97 pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
98 let tr_loc = tr.lookup(db);
99 let item_tree = db.item_tree(tr_loc.id.file_id);
100 let tr_def = &item_tree[tr_loc.id.value];
101 let name = tr_def.name.clone();
102 let is_auto = tr_def.is_auto;
103 let is_unsafe = tr_def.is_unsafe;
104 let module_id = tr_loc.container;
105 let container = AssocContainerId::TraitId(tr);
106 let mut expander = Expander::new(db, tr_loc.id.file_id, module_id);
107 let visibility = item_tree[tr_def.visibility].clone();
108 let bounds = tr_def.bounds.clone();
110 let items = collect_items(
114 tr_def.items.iter().copied(),
120 Arc::new(TraitData { name, items, is_auto, is_unsafe, visibility, bounds })
123 pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
124 self.items.iter().filter_map(|(_name, item)| match item {
125 AssocItemId::TypeAliasId(t) => Some(*t),
130 pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
131 self.items.iter().find_map(|(item_name, item)| match item {
132 AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
138 #[derive(Debug, Clone, PartialEq, Eq)]
139 pub struct ImplData {
140 pub target_trait: Option<TypeRef>,
141 pub target_type: TypeRef,
142 pub items: Vec<AssocItemId>,
143 pub is_negative: bool,
147 pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
148 let _p = profile::span("impl_data_query");
149 let impl_loc = id.lookup(db);
151 let item_tree = db.item_tree(impl_loc.id.file_id);
152 let impl_def = &item_tree[impl_loc.id.value];
153 let target_trait = impl_def.target_trait.map(|id| item_tree[id].clone());
154 let target_type = item_tree[impl_def.target_type].clone();
155 let is_negative = impl_def.is_negative;
156 let module_id = impl_loc.container;
157 let container = AssocContainerId::ImplId(id);
158 let mut expander = Expander::new(db, impl_loc.id.file_id, module_id);
160 let items = collect_items(
164 impl_def.items.iter().copied(),
169 let items = items.into_iter().map(|(_, item)| item).collect();
171 Arc::new(ImplData { target_trait, target_type, items, is_negative })
175 #[derive(Debug, Clone, PartialEq, Eq)]
176 pub struct ConstData {
177 /// const _: () = ();
178 pub name: Option<Name>,
179 pub type_ref: TypeRef,
180 pub visibility: RawVisibility,
184 pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
185 let loc = konst.lookup(db);
186 let item_tree = db.item_tree(loc.id.file_id);
187 let konst = &item_tree[loc.id.value];
190 name: konst.name.clone(),
191 type_ref: item_tree[konst.type_ref].clone(),
192 visibility: item_tree[konst.visibility].clone(),
197 #[derive(Debug, Clone, PartialEq, Eq)]
198 pub struct StaticData {
199 pub name: Option<Name>,
200 pub type_ref: TypeRef,
201 pub visibility: RawVisibility,
207 pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
208 let node = konst.lookup(db);
209 let item_tree = db.item_tree(node.id.file_id);
210 let statik = &item_tree[node.id.value];
212 Arc::new(StaticData {
213 name: Some(statik.name.clone()),
214 type_ref: item_tree[statik.type_ref].clone(),
215 visibility: item_tree[statik.visibility].clone(),
216 mutable: statik.mutable,
217 is_extern: statik.is_extern,
223 db: &dyn DefDatabase,
225 expander: &mut Expander,
226 assoc_items: impl Iterator<Item = AssocItem>,
227 file_id: crate::HirFileId,
228 container: AssocContainerId,
230 ) -> Vec<(Name, AssocItemId)> {
235 let item_tree = db.item_tree(file_id);
236 let cfg_options = db.crate_graph()[module.krate].cfg_options.clone();
238 let mut items = Vec::new();
239 for item in assoc_items {
241 AssocItem::Function(id) => {
242 let item = &item_tree[id];
243 let attrs = item_tree.attrs(db, module.krate, ModItem::from(id).into());
244 if !attrs.is_cfg_enabled(&cfg_options) {
247 let def = FunctionLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
248 items.push((item.name.clone(), def.into()));
251 AssocItem::Const(id) => {
252 let item = &item_tree[id];
253 let name = match item.name.clone() {
257 let def = ConstLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
258 items.push((name, def.into()));
260 AssocItem::TypeAlias(id) => {
261 let item = &item_tree[id];
262 let def = TypeAliasLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
263 items.push((item.name.clone(), def.into()));
265 AssocItem::MacroCall(call) => {
266 let call = &item_tree[call];
267 let ast_id_map = db.ast_id_map(file_id);
268 let root = db.parse_or_expand(file_id).unwrap();
269 let call = ast_id_map.get(call.ast_id).to_node(&root);
271 if let Some((mark, mac)) = expander.enter_expand(db, call).value {
272 let src: InFile<ast::MacroItems> = expander.to_source(mac);
273 let item_tree = db.item_tree(src.file_id);
275 item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
276 items.extend(collect_items(
286 expander.exit(db, mark);