1 //! Contains basic data about various HIR declarations.
5 use hir_expand::{name::Name, InFile};
13 item_tree::{self, AssocItem, FnFlags, ItemTreeId, ModItem, Param},
14 type_ref::{TraitRef, TypeBound, TypeRef},
15 visibility::RawVisibility,
16 AssocContainerId, AssocItemId, ConstId, ConstLoc, FunctionId, FunctionLoc, HasModule, ImplId,
17 Intern, Lookup, ModuleId, StaticId, TraitId, TypeAliasId, TypeAliasLoc,
20 #[derive(Debug, Clone, PartialEq, Eq)]
21 pub struct FunctionData {
23 pub params: Vec<Interned<TypeRef>>,
24 pub ret_type: Interned<TypeRef>,
25 pub async_ret_type: Option<Interned<TypeRef>>,
27 pub visibility: RawVisibility,
28 pub abi: Option<Interned<str>>,
33 pub(crate) fn fn_data_query(db: &dyn DefDatabase, func: FunctionId) -> Arc<FunctionData> {
34 let loc = func.lookup(db);
35 let krate = loc.container.module(db).krate;
36 let crate_graph = db.crate_graph();
37 let cfg_options = &crate_graph[krate].cfg_options;
38 let item_tree = loc.id.item_tree(db);
39 let func = &item_tree[loc.id.value];
41 let enabled_params = func
44 .filter(|¶m| item_tree.attrs(db, krate, param.into()).is_cfg_enabled(cfg_options));
46 // If last cfg-enabled param is a `...` param, it's a varargs function.
47 let is_varargs = enabled_params
50 .map_or(false, |param| matches!(item_tree[param], Param::Varargs));
52 let mut flags = func.flags;
54 flags.bits |= FnFlags::IS_VARARGS;
57 Arc::new(FunctionData {
58 name: func.name.clone(),
59 params: enabled_params
61 .filter_map(|id| match &item_tree[id] {
62 Param::Normal(ty) => Some(ty.clone()),
63 Param::Varargs => None,
66 ret_type: func.ret_type.clone(),
67 async_ret_type: func.async_ret_type.clone(),
68 attrs: item_tree.attrs(db, krate, ModItem::from(loc.id.value).into()),
69 visibility: item_tree[func.visibility].clone(),
70 abi: func.abi.clone(),
75 pub fn has_body(&self) -> bool {
76 self.flags.bits & FnFlags::HAS_BODY != 0
79 /// True if the first param is `self`. This is relevant to decide whether this
80 /// can be called as a method.
81 pub fn has_self_param(&self) -> bool {
82 self.flags.bits & FnFlags::HAS_SELF_PARAM != 0
85 pub fn is_default(&self) -> bool {
86 self.flags.bits & FnFlags::IS_DEFAULT != 0
89 pub fn is_const(&self) -> bool {
90 self.flags.bits & FnFlags::IS_CONST != 0
93 pub fn is_async(&self) -> bool {
94 self.flags.bits & FnFlags::IS_ASYNC != 0
97 pub fn is_unsafe(&self) -> bool {
98 self.flags.bits & FnFlags::IS_UNSAFE != 0
101 pub fn is_in_extern_block(&self) -> bool {
102 self.flags.bits & FnFlags::IS_IN_EXTERN_BLOCK != 0
105 pub fn is_varargs(&self) -> bool {
106 self.flags.bits & FnFlags::IS_VARARGS != 0
110 #[derive(Debug, Clone, PartialEq, Eq)]
111 pub struct TypeAliasData {
113 pub type_ref: Option<Interned<TypeRef>>,
114 pub visibility: RawVisibility,
116 /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
117 pub bounds: Vec<Interned<TypeBound>>,
121 pub(crate) fn type_alias_data_query(
122 db: &dyn DefDatabase,
124 ) -> Arc<TypeAliasData> {
125 let loc = typ.lookup(db);
126 let item_tree = loc.id.item_tree(db);
127 let typ = &item_tree[loc.id.value];
129 Arc::new(TypeAliasData {
130 name: typ.name.clone(),
131 type_ref: typ.type_ref.clone(),
132 visibility: item_tree[typ.visibility].clone(),
133 is_extern: typ.is_extern,
134 bounds: typ.bounds.to_vec(),
139 #[derive(Debug, Clone, PartialEq, Eq)]
140 pub struct TraitData {
142 pub items: Vec<(Name, AssocItemId)>,
145 pub visibility: RawVisibility,
146 /// Whether the trait has `#[rust_skip_array_during_method_dispatch]`. `hir_ty` will ignore
147 /// method calls to this trait's methods when the receiver is an array and the crate edition is
149 pub skip_array_during_method_dispatch: bool,
153 pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
154 let tr_loc = tr.lookup(db);
155 let item_tree = tr_loc.id.item_tree(db);
156 let tr_def = &item_tree[tr_loc.id.value];
157 let name = tr_def.name.clone();
158 let is_auto = tr_def.is_auto;
159 let is_unsafe = tr_def.is_unsafe;
160 let module_id = tr_loc.container;
161 let container = AssocContainerId::TraitId(tr);
162 let visibility = item_tree[tr_def.visibility].clone();
163 let mut expander = Expander::new(db, tr_loc.id.file_id(), module_id);
164 let skip_array_during_method_dispatch = item_tree
165 .attrs(db, tr_loc.container.krate(), ModItem::from(tr_loc.id.value).into())
166 .by_key("rustc_skip_array_during_method_dispatch")
169 let items = collect_items(
173 tr_def.items.iter().copied(),
185 skip_array_during_method_dispatch,
189 pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
190 self.items.iter().filter_map(|(_name, item)| match item {
191 AssocItemId::TypeAliasId(t) => Some(*t),
196 pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
197 self.items.iter().find_map(|(item_name, item)| match item {
198 AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
203 pub fn method_by_name(&self, name: &Name) -> Option<FunctionId> {
204 self.items.iter().find_map(|(item_name, item)| match item {
205 AssocItemId::FunctionId(t) if item_name == name => Some(*t),
211 #[derive(Debug, Clone, PartialEq, Eq)]
212 pub struct ImplData {
213 pub target_trait: Option<Interned<TraitRef>>,
214 pub self_ty: Interned<TypeRef>,
215 pub items: Vec<AssocItemId>,
216 pub is_negative: bool,
220 pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
221 let _p = profile::span("impl_data_query");
222 let impl_loc = id.lookup(db);
224 let item_tree = impl_loc.id.item_tree(db);
225 let impl_def = &item_tree[impl_loc.id.value];
226 let target_trait = impl_def.target_trait.clone();
227 let self_ty = impl_def.self_ty.clone();
228 let is_negative = impl_def.is_negative;
229 let module_id = impl_loc.container;
230 let container = AssocContainerId::ImplId(id);
231 let mut expander = Expander::new(db, impl_loc.id.file_id(), module_id);
233 let items = collect_items(
237 impl_def.items.iter().copied(),
238 impl_loc.id.tree_id(),
242 let items = items.into_iter().map(|(_, item)| item).collect();
244 Arc::new(ImplData { target_trait, self_ty, items, is_negative })
248 #[derive(Debug, Clone, PartialEq, Eq)]
249 pub struct ConstData {
250 /// const _: () = ();
251 pub name: Option<Name>,
252 pub type_ref: Interned<TypeRef>,
253 pub visibility: RawVisibility,
257 pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
258 let loc = konst.lookup(db);
259 let item_tree = loc.id.item_tree(db);
260 let konst = &item_tree[loc.id.value];
263 name: konst.name.clone(),
264 type_ref: konst.type_ref.clone(),
265 visibility: item_tree[konst.visibility].clone(),
270 #[derive(Debug, Clone, PartialEq, Eq)]
271 pub struct StaticData {
272 pub name: Option<Name>,
273 pub type_ref: Interned<TypeRef>,
274 pub visibility: RawVisibility,
280 pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
281 let node = konst.lookup(db);
282 let item_tree = node.id.item_tree(db);
283 let statik = &item_tree[node.id.value];
285 Arc::new(StaticData {
286 name: Some(statik.name.clone()),
287 type_ref: statik.type_ref.clone(),
288 visibility: item_tree[statik.visibility].clone(),
289 mutable: statik.mutable,
290 is_extern: statik.is_extern,
296 db: &dyn DefDatabase,
298 expander: &mut Expander,
299 assoc_items: impl Iterator<Item = AssocItem>,
300 tree_id: item_tree::TreeId,
301 container: AssocContainerId,
303 ) -> Vec<(Name, AssocItemId)> {
308 let item_tree = tree_id.item_tree(db);
309 let crate_graph = db.crate_graph();
310 let cfg_options = &crate_graph[module.krate].cfg_options;
312 let mut items = Vec::new();
313 for item in assoc_items {
314 let attrs = item_tree.attrs(db, module.krate, ModItem::from(item).into());
315 if !attrs.is_cfg_enabled(cfg_options) {
320 AssocItem::Function(id) => {
321 let item = &item_tree[id];
322 let def = FunctionLoc { container, id: ItemTreeId::new(tree_id, id) }.intern(db);
323 items.push((item.name.clone(), def.into()));
325 AssocItem::Const(id) => {
326 let item = &item_tree[id];
327 let name = match item.name.clone() {
331 let def = ConstLoc { container, id: ItemTreeId::new(tree_id, id) }.intern(db);
332 items.push((name, def.into()));
334 AssocItem::TypeAlias(id) => {
335 let item = &item_tree[id];
336 let def = TypeAliasLoc { container, id: ItemTreeId::new(tree_id, id) }.intern(db);
337 items.push((item.name.clone(), def.into()));
339 AssocItem::MacroCall(call) => {
340 let call = &item_tree[call];
341 let ast_id_map = db.ast_id_map(tree_id.file_id());
342 let root = db.parse_or_expand(tree_id.file_id()).unwrap();
343 let call = ast_id_map.get(call.ast_id).to_node(&root);
344 let res = expander.enter_expand(db, call);
346 if let Ok(res) = res {
347 if let Some((mark, mac)) = res.value {
348 let src: InFile<ast::MacroItems> = expander.to_source(mac);
349 let tree_id = item_tree::TreeId::new(src.file_id, None);
350 let item_tree = tree_id.item_tree(db);
352 item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
353 items.extend(collect_items(
363 expander.exit(db, mark);