1 //! Contains basic data about various HIR declarations.
5 use hir_expand::{name::Name, InFile};
12 item_tree::{AssocItem, 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 param_names: Vec<Option<Name>>,
23 pub params: Vec<TypeRef>,
24 pub ret_type: TypeRef,
26 /// True if the first param is `self`. This is relevant to decide whether this
27 /// can be called as a method.
28 pub has_self_param: 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 item_tree = db.item_tree(loc.id.file_id);
39 let func = &item_tree[loc.id.value];
41 Arc::new(FunctionData {
42 name: func.name.clone(),
43 param_names: func.param_names.to_vec(),
44 params: func.params.to_vec(),
45 ret_type: func.ret_type.clone(),
46 attrs: item_tree.attrs(ModItem::from(loc.id.value).into()).clone(),
47 has_self_param: func.has_self_param,
48 has_body: func.has_body,
49 is_unsafe: func.is_unsafe,
50 is_varargs: func.is_varargs,
51 visibility: item_tree[func.visibility].clone(),
56 #[derive(Debug, Clone, PartialEq, Eq)]
57 pub struct TypeAliasData {
59 pub type_ref: Option<TypeRef>,
60 pub visibility: RawVisibility,
62 /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
63 pub bounds: Vec<TypeBound>,
67 pub(crate) fn type_alias_data_query(
70 ) -> Arc<TypeAliasData> {
71 let loc = typ.lookup(db);
72 let item_tree = db.item_tree(loc.id.file_id);
73 let typ = &item_tree[loc.id.value];
75 Arc::new(TypeAliasData {
76 name: typ.name.clone(),
77 type_ref: typ.type_ref.clone(),
78 visibility: item_tree[typ.visibility].clone(),
79 is_extern: typ.is_extern,
80 bounds: typ.bounds.to_vec(),
85 #[derive(Debug, Clone, PartialEq, Eq)]
86 pub struct TraitData {
88 pub items: Vec<(Name, AssocItemId)>,
93 pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
94 let tr_loc = tr.lookup(db);
95 let item_tree = db.item_tree(tr_loc.id.file_id);
96 let tr_def = &item_tree[tr_loc.id.value];
97 let name = tr_def.name.clone();
98 let auto = tr_def.auto;
99 let module_id = tr_loc.container.module(db);
100 let container = AssocContainerId::TraitId(tr);
101 let mut expander = Expander::new(db, tr_loc.id.file_id, module_id);
103 let items = collect_items(
107 tr_def.items.iter().copied(),
113 Arc::new(TraitData { name, items, auto })
116 pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
117 self.items.iter().filter_map(|(_name, item)| match item {
118 AssocItemId::TypeAliasId(t) => Some(*t),
123 pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
124 self.items.iter().find_map(|(item_name, item)| match item {
125 AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
131 #[derive(Debug, Clone, PartialEq, Eq)]
132 pub struct ImplData {
133 pub target_trait: Option<TypeRef>,
134 pub target_type: TypeRef,
135 pub items: Vec<AssocItemId>,
136 pub is_negative: bool,
140 pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
141 let _p = profile::span("impl_data_query");
142 let impl_loc = id.lookup(db);
144 let item_tree = db.item_tree(impl_loc.id.file_id);
145 let impl_def = &item_tree[impl_loc.id.value];
146 let target_trait = impl_def.target_trait.clone();
147 let target_type = impl_def.target_type.clone();
148 let is_negative = impl_def.is_negative;
149 let module_id = impl_loc.container.module(db);
150 let container = AssocContainerId::ImplId(id);
151 let mut expander = Expander::new(db, impl_loc.id.file_id, module_id);
153 let items = collect_items(
157 impl_def.items.iter().copied(),
162 let items = items.into_iter().map(|(_, item)| item).collect();
164 Arc::new(ImplData { target_trait, target_type, items, is_negative })
168 #[derive(Debug, Clone, PartialEq, Eq)]
169 pub struct ConstData {
170 /// const _: () = ();
171 pub name: Option<Name>,
172 pub type_ref: TypeRef,
173 pub visibility: RawVisibility,
177 pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
178 let loc = konst.lookup(db);
179 let item_tree = db.item_tree(loc.id.file_id);
180 let konst = &item_tree[loc.id.value];
183 name: konst.name.clone(),
184 type_ref: konst.type_ref.clone(),
185 visibility: item_tree[konst.visibility].clone(),
190 #[derive(Debug, Clone, PartialEq, Eq)]
191 pub struct StaticData {
192 pub name: Option<Name>,
193 pub type_ref: TypeRef,
194 pub visibility: RawVisibility,
199 pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
200 let node = konst.lookup(db);
201 let item_tree = db.item_tree(node.id.file_id);
202 let statik = &item_tree[node.id.value];
204 Arc::new(StaticData {
205 name: Some(statik.name.clone()),
206 type_ref: statik.type_ref.clone(),
207 visibility: item_tree[statik.visibility].clone(),
208 mutable: statik.mutable,
214 db: &dyn DefDatabase,
216 expander: &mut Expander,
217 assoc_items: impl Iterator<Item = AssocItem>,
218 file_id: crate::HirFileId,
219 container: AssocContainerId,
221 ) -> Vec<(Name, AssocItemId)> {
226 let item_tree = db.item_tree(file_id);
227 let cfg_options = db.crate_graph()[module.krate].cfg_options.clone();
229 let mut items = Vec::new();
230 for item in assoc_items {
232 AssocItem::Function(id) => {
233 let item = &item_tree[id];
234 let attrs = item_tree.attrs(ModItem::from(id).into());
235 if !attrs.is_cfg_enabled(&cfg_options) {
238 let def = FunctionLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
239 items.push((item.name.clone(), def.into()));
242 AssocItem::Const(id) => {
243 let item = &item_tree[id];
244 let name = match item.name.clone() {
248 let def = ConstLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
249 items.push((name, def.into()));
251 AssocItem::TypeAlias(id) => {
252 let item = &item_tree[id];
253 let def = TypeAliasLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
254 items.push((item.name.clone(), def.into()));
256 AssocItem::MacroCall(call) => {
257 let call = &item_tree[call];
258 let ast_id_map = db.ast_id_map(file_id);
259 let root = db.parse_or_expand(file_id).unwrap();
260 let call = ast_id_map.get(call.ast_id).to_node(&root);
262 if let Some((mark, mac)) = expander.enter_expand(db, None, call) {
263 let src: InFile<ast::MacroItems> = expander.to_source(mac);
264 let item_tree = db.item_tree(src.file_id);
266 item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
267 items.extend(collect_items(
277 expander.exit(db, mark);