1 //! Contains basic data about various HIR declarations.
5 use hir_expand::{name::Name, InFile};
12 item_tree::{AssocItem, FunctionQualifier, ItemTreeId, ModItem, Param},
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 crate_graph = db.crate_graph();
40 let cfg_options = &crate_graph[krate].cfg_options;
41 let item_tree = db.item_tree(loc.id.file_id);
42 let func = &item_tree[loc.id.value];
44 let enabled_params = func
47 .filter(|¶m| item_tree.attrs(db, krate, param.into()).is_cfg_enabled(cfg_options));
49 // If last cfg-enabled param is a `...` param, it's a varargs function.
50 let is_varargs = enabled_params
53 .map_or(false, |param| matches!(item_tree[param], Param::Varargs));
55 Arc::new(FunctionData {
56 name: func.name.clone(),
57 params: enabled_params
59 .filter_map(|id| match &item_tree[id] {
60 Param::Normal(ty) => Some(item_tree[*ty].clone()),
61 Param::Varargs => None,
64 ret_type: item_tree[func.ret_type].clone(),
65 attrs: item_tree.attrs(db, krate, ModItem::from(loc.id.value).into()),
66 has_self_param: func.has_self_param,
67 has_body: func.has_body,
68 qualifier: func.qualifier.clone(),
69 is_in_extern_block: func.is_in_extern_block,
71 visibility: item_tree[func.visibility].clone(),
76 #[derive(Debug, Clone, PartialEq, Eq)]
77 pub struct TypeAliasData {
79 pub type_ref: Option<TypeRef>,
80 pub visibility: RawVisibility,
82 /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
83 pub bounds: Vec<TypeBound>,
87 pub(crate) fn type_alias_data_query(
90 ) -> Arc<TypeAliasData> {
91 let loc = typ.lookup(db);
92 let item_tree = db.item_tree(loc.id.file_id);
93 let typ = &item_tree[loc.id.value];
95 Arc::new(TypeAliasData {
96 name: typ.name.clone(),
97 type_ref: typ.type_ref.map(|id| item_tree[id].clone()),
98 visibility: item_tree[typ.visibility].clone(),
99 is_extern: typ.is_extern,
100 bounds: typ.bounds.to_vec(),
105 #[derive(Debug, Clone, PartialEq, Eq)]
106 pub struct TraitData {
108 pub items: Vec<(Name, AssocItemId)>,
111 pub visibility: RawVisibility,
112 pub bounds: Box<[TypeBound]>,
116 pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
117 let tr_loc = tr.lookup(db);
118 let item_tree = db.item_tree(tr_loc.id.file_id);
119 let tr_def = &item_tree[tr_loc.id.value];
120 let name = tr_def.name.clone();
121 let is_auto = tr_def.is_auto;
122 let is_unsafe = tr_def.is_unsafe;
123 let module_id = tr_loc.container;
124 let container = AssocContainerId::TraitId(tr);
125 let mut expander = Expander::new(db, tr_loc.id.file_id, module_id);
126 let visibility = item_tree[tr_def.visibility].clone();
127 let bounds = tr_def.bounds.clone();
129 let items = collect_items(
133 tr_def.items.iter().copied(),
139 Arc::new(TraitData { name, items, is_auto, is_unsafe, visibility, bounds })
142 pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
143 self.items.iter().filter_map(|(_name, item)| match item {
144 AssocItemId::TypeAliasId(t) => Some(*t),
149 pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
150 self.items.iter().find_map(|(item_name, item)| match item {
151 AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
157 #[derive(Debug, Clone, PartialEq, Eq)]
158 pub struct ImplData {
159 pub target_trait: Option<TypeRef>,
160 pub target_type: TypeRef,
161 pub items: Vec<AssocItemId>,
162 pub is_negative: bool,
166 pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
167 let _p = profile::span("impl_data_query");
168 let impl_loc = id.lookup(db);
170 let item_tree = db.item_tree(impl_loc.id.file_id);
171 let impl_def = &item_tree[impl_loc.id.value];
172 let target_trait = impl_def.target_trait.map(|id| item_tree[id].clone());
173 let target_type = item_tree[impl_def.target_type].clone();
174 let is_negative = impl_def.is_negative;
175 let module_id = impl_loc.container;
176 let container = AssocContainerId::ImplId(id);
177 let mut expander = Expander::new(db, impl_loc.id.file_id, module_id);
179 let items = collect_items(
183 impl_def.items.iter().copied(),
188 let items = items.into_iter().map(|(_, item)| item).collect();
190 Arc::new(ImplData { target_trait, target_type, items, is_negative })
194 #[derive(Debug, Clone, PartialEq, Eq)]
195 pub struct ConstData {
196 /// const _: () = ();
197 pub name: Option<Name>,
198 pub type_ref: TypeRef,
199 pub visibility: RawVisibility,
203 pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
204 let loc = konst.lookup(db);
205 let item_tree = db.item_tree(loc.id.file_id);
206 let konst = &item_tree[loc.id.value];
209 name: konst.name.clone(),
210 type_ref: item_tree[konst.type_ref].clone(),
211 visibility: item_tree[konst.visibility].clone(),
216 #[derive(Debug, Clone, PartialEq, Eq)]
217 pub struct StaticData {
218 pub name: Option<Name>,
219 pub type_ref: TypeRef,
220 pub visibility: RawVisibility,
226 pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
227 let node = konst.lookup(db);
228 let item_tree = db.item_tree(node.id.file_id);
229 let statik = &item_tree[node.id.value];
231 Arc::new(StaticData {
232 name: Some(statik.name.clone()),
233 type_ref: item_tree[statik.type_ref].clone(),
234 visibility: item_tree[statik.visibility].clone(),
235 mutable: statik.mutable,
236 is_extern: statik.is_extern,
242 db: &dyn DefDatabase,
244 expander: &mut Expander,
245 assoc_items: impl Iterator<Item = AssocItem>,
246 file_id: crate::HirFileId,
247 container: AssocContainerId,
249 ) -> Vec<(Name, AssocItemId)> {
254 let item_tree = db.item_tree(file_id);
255 let cfg_options = db.crate_graph()[module.krate].cfg_options.clone();
257 let mut items = Vec::new();
258 for item in assoc_items {
260 AssocItem::Function(id) => {
261 let item = &item_tree[id];
262 let attrs = item_tree.attrs(db, module.krate, ModItem::from(id).into());
263 if !attrs.is_cfg_enabled(&cfg_options) {
266 let def = FunctionLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
267 items.push((item.name.clone(), def.into()));
270 AssocItem::Const(id) => {
271 let item = &item_tree[id];
272 let name = match item.name.clone() {
276 let def = ConstLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
277 items.push((name, def.into()));
279 AssocItem::TypeAlias(id) => {
280 let item = &item_tree[id];
281 let def = TypeAliasLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
282 items.push((item.name.clone(), def.into()));
284 AssocItem::MacroCall(call) => {
285 let call = &item_tree[call];
286 let ast_id_map = db.ast_id_map(file_id);
287 let root = db.parse_or_expand(file_id).unwrap();
288 let call = ast_id_map.get(call.ast_id).to_node(&root);
289 let res = expander.enter_expand(db, call);
291 if let Ok(res) = res {
292 if let Some((mark, mac)) = res.value {
293 let src: InFile<ast::MacroItems> = expander.to_source(mac);
294 let item_tree = db.item_tree(src.file_id);
296 item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
297 items.extend(collect_items(
307 expander.exit(db, mark);