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-rw-r--r--crates/ra_hir/src/source_binder.rs828
1 files changed, 308 insertions, 520 deletions
diff --git a/crates/ra_hir/src/source_binder.rs b/crates/ra_hir/src/source_binder.rs
index a2a9d968c..f3150f578 100644
--- a/crates/ra_hir/src/source_binder.rs
+++ b/crates/ra_hir/src/source_binder.rs
@@ -1,569 +1,357 @@
1//! Lookup hir elements using positions in the source code. This is a lossy 1//! `SourceBinder` is the main entry point for getting info about source code.
2//! transformation: in general, a single source might correspond to several 2//! It's main task is to map source syntax trees to hir-level IDs.
3//! modules, functions, etc, due to macros, cfgs and `#[path=]` attributes on 3
4//! modules.
5//!
6//! So, this modules should not be used during hir construction, it exists
7//! purely for "IDE needs".
8use std::sync::Arc;
9
10use either::Either;
11use hir_def::{ 4use hir_def::{
12 body::{ 5 child_by_source::ChildBySource,
13 scope::{ExprScopes, ScopeId}, 6 dyn_map::DynMap,
14 BodySourceMap, 7 keys::{self, Key},
15 }, 8 resolver::{HasResolver, Resolver},
16 expr::{ExprId, PatId}, 9 ConstId, DefWithBodyId, EnumId, EnumVariantId, FunctionId, GenericDefId, ImplId, ModuleId,
17 nameres::ModuleSource, 10 StaticId, StructFieldId, StructId, TraitId, TypeAliasId, UnionId, VariantId,
18 path::path,
19 resolver::{self, resolver_for_scope, HasResolver, Resolver, TypeNs, ValueNs},
20 AssocItemId, DefWithBodyId,
21};
22use hir_expand::{
23 hygiene::Hygiene, name::AsName, AstId, HirFileId, InFile, MacroCallId, MacroCallKind,
24};
25use hir_ty::{
26 method_resolution::{self, implements_trait},
27 Canonical, InEnvironment, InferenceResult, TraitEnvironment, Ty,
28}; 11};
12use hir_expand::{name::AsName, AstId, InFile, MacroDefId, MacroDefKind};
29use ra_prof::profile; 13use ra_prof::profile;
30use ra_syntax::{ 14use ra_syntax::{
31 ast::{self, AstNode}, 15 ast::{self, NameOwner},
32 match_ast, AstPtr, 16 match_ast, AstNode, SyntaxNode, TextUnit,
33 SyntaxKind::*,
34 SyntaxNode, SyntaxNodePtr, SyntaxToken, TextRange, TextUnit,
35}; 17};
18use rustc_hash::FxHashMap;
36 19
37use crate::{ 20use crate::{db::HirDatabase, Local, Module, SourceAnalyzer, TypeParam};
38 db::HirDatabase, Adt, AssocItem, Const, DefWithBody, Enum, EnumVariant, FromSource, Function, 21use ra_db::FileId;
39 ImplBlock, Local, MacroDef, Name, Path, ScopeDef, Static, Struct, Trait, Type, TypeAlias,
40 TypeParam,
41};
42
43fn try_get_resolver_for_node(db: &impl HirDatabase, node: InFile<&SyntaxNode>) -> Option<Resolver> {
44 match_ast! {
45 match (node.value) {
46 ast::Module(it) => {
47 let src = node.with_value(it);
48 Some(crate::Module::from_declaration(db, src)?.id.resolver(db))
49 },
50 ast::SourceFile(it) => {
51 let src = node.with_value(ModuleSource::SourceFile(it));
52 Some(crate::Module::from_definition(db, src)?.id.resolver(db))
53 },
54 ast::StructDef(it) => {
55 let src = node.with_value(it);
56 Some(Struct::from_source(db, src)?.id.resolver(db))
57 },
58 ast::EnumDef(it) => {
59 let src = node.with_value(it);
60 Some(Enum::from_source(db, src)?.id.resolver(db))
61 },
62 ast::ImplBlock(it) => {
63 let src = node.with_value(it);
64 Some(ImplBlock::from_source(db, src)?.id.resolver(db))
65 },
66 ast::TraitDef(it) => {
67 let src = node.with_value(it);
68 Some(Trait::from_source(db, src)?.id.resolver(db))
69 },
70 _ => match node.value.kind() {
71 FN_DEF | CONST_DEF | STATIC_DEF => {
72 let def = def_with_body_from_child_node(db, node)?;
73 let def = DefWithBodyId::from(def);
74 Some(def.resolver(db))
75 }
76 // FIXME add missing cases
77 _ => None
78 }
79 }
80 }
81}
82
83fn def_with_body_from_child_node(
84 db: &impl HirDatabase,
85 child: InFile<&SyntaxNode>,
86) -> Option<DefWithBody> {
87 let _p = profile("def_with_body_from_child_node");
88 child.cloned().ancestors_with_macros(db).find_map(|node| {
89 let n = &node.value;
90 match_ast! {
91 match n {
92 ast::FnDef(def) => { return Function::from_source(db, node.with_value(def)).map(DefWithBody::from); },
93 ast::ConstDef(def) => { return Const::from_source(db, node.with_value(def)).map(DefWithBody::from); },
94 ast::StaticDef(def) => { return Static::from_source(db, node.with_value(def)).map(DefWithBody::from); },
95 _ => { None },
96 }
97 }
98 })
99}
100
101/// `SourceAnalyzer` is a convenience wrapper which exposes HIR API in terms of
102/// original source files. It should not be used inside the HIR itself.
103#[derive(Debug)]
104pub struct SourceAnalyzer {
105 file_id: HirFileId,
106 resolver: Resolver,
107 body_owner: Option<DefWithBody>,
108 body_source_map: Option<Arc<BodySourceMap>>,
109 infer: Option<Arc<InferenceResult>>,
110 scopes: Option<Arc<ExprScopes>>,
111}
112
113#[derive(Debug, Clone, PartialEq, Eq)]
114pub enum PathResolution {
115 /// An item
116 Def(crate::ModuleDef),
117 /// A local binding (only value namespace)
118 Local(Local),
119 /// A generic parameter
120 TypeParam(TypeParam),
121 SelfType(crate::ImplBlock),
122 Macro(MacroDef),
123 AssocItem(crate::AssocItem),
124}
125
126#[derive(Debug, Clone, PartialEq, Eq)]
127pub struct ScopeEntryWithSyntax {
128 pub(crate) name: Name,
129 pub(crate) ptr: Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>>,
130}
131
132impl ScopeEntryWithSyntax {
133 pub fn name(&self) -> &Name {
134 &self.name
135 }
136
137 pub fn ptr(&self) -> Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>> {
138 self.ptr
139 }
140}
141
142#[derive(Debug)]
143pub struct ReferenceDescriptor {
144 pub range: TextRange,
145 pub name: String,
146}
147 22
148#[derive(Debug)] 23pub struct SourceBinder<'a, DB> {
149pub struct Expansion { 24 pub db: &'a DB,
150 macro_call_id: MacroCallId, 25 child_by_source_cache: FxHashMap<ChildContainer, DynMap>,
151} 26}
152 27
153impl Expansion { 28impl<DB: HirDatabase> SourceBinder<'_, DB> {
154 pub fn map_token_down( 29 pub fn new(db: &DB) -> SourceBinder<DB> {
155 &self, 30 SourceBinder { db, child_by_source_cache: FxHashMap::default() }
156 db: &impl HirDatabase,
157 token: InFile<&SyntaxToken>,
158 ) -> Option<InFile<SyntaxToken>> {
159 let exp_info = self.file_id().expansion_info(db)?;
160 exp_info.map_token_down(token)
161 }
162
163 pub fn file_id(&self) -> HirFileId {
164 self.macro_call_id.as_file()
165 } 31 }
166}
167 32
168impl SourceAnalyzer { 33 pub fn analyze(
169 pub fn new( 34 &mut self,
170 db: &impl HirDatabase, 35 src: InFile<&SyntaxNode>,
171 node: InFile<&SyntaxNode>,
172 offset: Option<TextUnit>, 36 offset: Option<TextUnit>,
173 ) -> SourceAnalyzer { 37 ) -> SourceAnalyzer {
174 let _p = profile("SourceAnalyzer::new"); 38 let _p = profile("SourceBinder::analyzer");
175 let def_with_body = def_with_body_from_child_node(db, node); 39 let container = match self.find_container(src) {
176 if let Some(def) = def_with_body { 40 Some(it) => it,
177 let (_body, source_map) = db.body_with_source_map(def.into()); 41 None => return SourceAnalyzer::new_for_resolver(Resolver::default(), src),
178 let scopes = db.expr_scopes(def.into()); 42 };
179 let scope = match offset { 43
180 None => scope_for(&scopes, &source_map, node), 44 let resolver = match container {
181 Some(offset) => scope_for_offset(&scopes, &source_map, node.with_value(offset)), 45 ChildContainer::DefWithBodyId(def) => {
182 }; 46 return SourceAnalyzer::new_for_body(self.db, def, src, offset)
183 let resolver = resolver_for_scope(db, def.into(), scope);
184 SourceAnalyzer {
185 resolver,
186 body_owner: Some(def),
187 body_source_map: Some(source_map),
188 infer: Some(db.infer(def.into())),
189 scopes: Some(scopes),
190 file_id: node.file_id,
191 }
192 } else {
193 SourceAnalyzer {
194 resolver: node
195 .value
196 .ancestors()
197 .find_map(|it| try_get_resolver_for_node(db, node.with_value(&it)))
198 .unwrap_or_default(),
199 body_owner: None,
200 body_source_map: None,
201 infer: None,
202 scopes: None,
203 file_id: node.file_id,
204 } 47 }
205 } 48 ChildContainer::TraitId(it) => it.resolver(self.db),
49 ChildContainer::ImplId(it) => it.resolver(self.db),
50 ChildContainer::ModuleId(it) => it.resolver(self.db),
51 ChildContainer::EnumId(it) => it.resolver(self.db),
52 ChildContainer::VariantId(it) => it.resolver(self.db),
53 ChildContainer::GenericDefId(it) => it.resolver(self.db),
54 };
55 SourceAnalyzer::new_for_resolver(resolver, src)
206 } 56 }
207 57
208 pub fn module(&self) -> Option<crate::code_model::Module> { 58 pub fn to_def<T: ToDef>(&mut self, src: InFile<T>) -> Option<T::Def> {
209 Some(crate::code_model::Module { id: self.resolver.module()? }) 59 T::to_def(self, src)
210 } 60 }
211 61
212 fn expr_id(&self, expr: &ast::Expr) -> Option<ExprId> { 62 pub fn to_module_def(&mut self, file: FileId) -> Option<Module> {
213 let src = InFile { file_id: self.file_id, value: expr }; 63 let _p = profile("SourceBinder::to_module_def");
214 self.body_source_map.as_ref()?.node_expr(src) 64 let (krate, local_id) = self.db.relevant_crates(file).iter().find_map(|&crate_id| {
65 let crate_def_map = self.db.crate_def_map(crate_id);
66 let local_id = crate_def_map.modules_for_file(file).next()?;
67 Some((crate_id, local_id))
68 })?;
69 Some(Module { id: ModuleId { krate, local_id } })
215 } 70 }
216 71
217 fn pat_id(&self, pat: &ast::Pat) -> Option<PatId> { 72 fn to_id<T: ToId>(&mut self, src: InFile<T>) -> Option<T::ID> {
218 let src = InFile { file_id: self.file_id, value: pat }; 73 T::to_id(self, src)
219 self.body_source_map.as_ref()?.node_pat(src)
220 } 74 }
221 75
222 fn expand_expr( 76 fn find_container(&mut self, src: InFile<&SyntaxNode>) -> Option<ChildContainer> {
223 &self, 77 for container in src.cloned().ancestors_with_macros(self.db).skip(1) {
224 db: &impl HirDatabase, 78 let res: ChildContainer = match_ast! {
225 expr: InFile<&ast::Expr>, 79 match (container.value) {
226 ) -> Option<InFile<ast::Expr>> { 80 ast::TraitDef(it) => {
227 let macro_call = ast::MacroCall::cast(expr.value.syntax().clone())?; 81 let def: TraitId = self.to_id(container.with_value(it))?;
228 let macro_file = 82 def.into()
229 self.body_source_map.as_ref()?.node_macro_file(expr.with_value(&macro_call))?; 83 },
230 let expanded = db.parse_or_expand(macro_file)?; 84 ast::ImplBlock(it) => {
231 let kind = expanded.kind(); 85 let def: ImplId = self.to_id(container.with_value(it))?;
232 let expr = InFile::new(macro_file, ast::Expr::cast(expanded)?); 86 def.into()
233 87 },
234 if ast::MacroCall::can_cast(kind) { 88 ast::FnDef(it) => {
235 self.expand_expr(db, expr.as_ref()) 89 let def: FunctionId = self.to_id(container.with_value(it))?;
236 } else { 90 DefWithBodyId::from(def).into()
237 Some(expr) 91 },
92 ast::StaticDef(it) => {
93 let def: StaticId = self.to_id(container.with_value(it))?;
94 DefWithBodyId::from(def).into()
95 },
96 ast::ConstDef(it) => {
97 let def: ConstId = self.to_id(container.with_value(it))?;
98 DefWithBodyId::from(def).into()
99 },
100 ast::EnumDef(it) => {
101 let def: EnumId = self.to_id(container.with_value(it))?;
102 def.into()
103 },
104 ast::StructDef(it) => {
105 let def: StructId = self.to_id(container.with_value(it))?;
106 VariantId::from(def).into()
107 },
108 ast::UnionDef(it) => {
109 let def: UnionId = self.to_id(container.with_value(it))?;
110 VariantId::from(def).into()
111 },
112 ast::Module(it) => {
113 let def: ModuleId = self.to_id(container.with_value(it))?;
114 def.into()
115 },
116 _ => { continue },
117 }
118 };
119 return Some(res);
238 } 120 }
239 }
240 121
241 pub fn type_of(&self, db: &impl HirDatabase, expr: &ast::Expr) -> Option<Type> { 122 let c = self.to_module_def(src.file_id.original_file(self.db))?;
242 let expr_id = if let Some(expr) = self.expand_expr(db, InFile::new(self.file_id, expr)) { 123 Some(c.id.into())
243 self.body_source_map.as_ref()?.node_expr(expr.as_ref())?
244 } else {
245 self.expr_id(expr)?
246 };
247
248 let ty = self.infer.as_ref()?[expr_id].clone();
249 let environment = TraitEnvironment::lower(db, &self.resolver);
250 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
251 }
252
253 pub fn type_of_pat(&self, db: &impl HirDatabase, pat: &ast::Pat) -> Option<Type> {
254 let pat_id = self.pat_id(pat)?;
255 let ty = self.infer.as_ref()?[pat_id].clone();
256 let environment = TraitEnvironment::lower(db, &self.resolver);
257 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
258 } 124 }
259 125
260 pub fn resolve_method_call(&self, call: &ast::MethodCallExpr) -> Option<Function> { 126 fn child_by_source(&mut self, container: ChildContainer) -> &DynMap {
261 let expr_id = self.expr_id(&call.clone().into())?; 127 let db = self.db;
262 self.infer.as_ref()?.method_resolution(expr_id).map(Function::from) 128 self.child_by_source_cache.entry(container).or_insert_with(|| match container {
129 ChildContainer::DefWithBodyId(it) => it.child_by_source(db),
130 ChildContainer::ModuleId(it) => it.child_by_source(db),
131 ChildContainer::TraitId(it) => it.child_by_source(db),
132 ChildContainer::ImplId(it) => it.child_by_source(db),
133 ChildContainer::EnumId(it) => it.child_by_source(db),
134 ChildContainer::VariantId(it) => it.child_by_source(db),
135 ChildContainer::GenericDefId(it) => it.child_by_source(db),
136 })
263 } 137 }
138}
264 139
265 pub fn resolve_field(&self, field: &ast::FieldExpr) -> Option<crate::StructField> { 140pub trait ToId: Sized {
266 let expr_id = self.expr_id(&field.clone().into())?; 141 type ID: Sized + Copy + 'static;
267 self.infer.as_ref()?.field_resolution(expr_id).map(|it| it.into()) 142 fn to_id<DB: HirDatabase>(sb: &mut SourceBinder<'_, DB>, src: InFile<Self>)
268 } 143 -> Option<Self::ID>;
144}
269 145
270 pub fn resolve_record_field(&self, field: &ast::RecordField) -> Option<crate::StructField> { 146pub trait ToDef: Sized + AstNode + 'static {
271 let expr_id = match field.expr() { 147 type Def;
272 Some(it) => self.expr_id(&it)?, 148 fn to_def<DB: HirDatabase>(
273 None => { 149 sb: &mut SourceBinder<'_, DB>,
274 let src = InFile { file_id: self.file_id, value: field }; 150 src: InFile<Self>,
275 self.body_source_map.as_ref()?.field_init_shorthand_expr(src)? 151 ) -> Option<Self::Def>;
276 } 152}
277 };
278 self.infer.as_ref()?.record_field_resolution(expr_id).map(|it| it.into())
279 }
280 153
281 pub fn resolve_record_literal(&self, record_lit: &ast::RecordLit) -> Option<crate::VariantDef> { 154macro_rules! to_def_impls {
282 let expr_id = self.expr_id(&record_lit.clone().into())?; 155 ($(($def:path, $ast:path)),* ,) => {$(
283 self.infer.as_ref()?.variant_resolution_for_expr(expr_id).map(|it| it.into()) 156 impl ToDef for $ast {
284 } 157 type Def = $def;
158 fn to_def<DB: HirDatabase>(sb: &mut SourceBinder<'_, DB>, src: InFile<Self>)
159 -> Option<Self::Def>
160 { sb.to_id(src).map(Into::into) }
161 }
162 )*}
163}
285 164
286 pub fn resolve_record_pattern(&self, record_pat: &ast::RecordPat) -> Option<crate::VariantDef> { 165to_def_impls![
287 let pat_id = self.pat_id(&record_pat.clone().into())?; 166 (crate::Module, ast::Module),
288 self.infer.as_ref()?.variant_resolution_for_pat(pat_id).map(|it| it.into()) 167 (crate::Struct, ast::StructDef),
289 } 168 (crate::Enum, ast::EnumDef),
169 (crate::Union, ast::UnionDef),
170 (crate::Trait, ast::TraitDef),
171 (crate::ImplBlock, ast::ImplBlock),
172 (crate::TypeAlias, ast::TypeAliasDef),
173 (crate::Const, ast::ConstDef),
174 (crate::Static, ast::StaticDef),
175 (crate::Function, ast::FnDef),
176 (crate::StructField, ast::RecordFieldDef),
177 (crate::EnumVariant, ast::EnumVariant),
178 (crate::MacroDef, ast::MacroCall), // this one is dubious, not all calls are macros
179];
180
181#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
182enum ChildContainer {
183 DefWithBodyId(DefWithBodyId),
184 ModuleId(ModuleId),
185 TraitId(TraitId),
186 ImplId(ImplId),
187 EnumId(EnumId),
188 VariantId(VariantId),
189 /// XXX: this might be the same def as, for example an `EnumId`. However,
190 /// here the children generic parameters, and not, eg enum variants.
191 GenericDefId(GenericDefId),
192}
193impl_froms! {
194 ChildContainer:
195 DefWithBodyId,
196 ModuleId,
197 TraitId,
198 ImplId,
199 EnumId,
200 VariantId,
201 GenericDefId
202}
290 203
291 pub fn resolve_macro_call( 204pub trait ToIdByKey: Sized + AstNode + 'static {
292 &self, 205 type ID: Sized + Copy + 'static;
293 db: &impl HirDatabase, 206 const KEY: Key<Self, Self::ID>;
294 macro_call: InFile<&ast::MacroCall>, 207}
295 ) -> Option<MacroDef> {
296 let hygiene = Hygiene::new(db, macro_call.file_id);
297 let path = macro_call.value.path().and_then(|ast| Path::from_src(ast, &hygiene))?;
298 self.resolver.resolve_path_as_macro(db, path.mod_path()).map(|it| it.into())
299 }
300 208
301 pub fn resolve_hir_path( 209impl<T: ToIdByKey> ToId for T {
302 &self, 210 type ID = <T as ToIdByKey>::ID;
303 db: &impl HirDatabase, 211 fn to_id<DB: HirDatabase>(
304 path: &crate::Path, 212 sb: &mut SourceBinder<'_, DB>,
305 ) -> Option<PathResolution> { 213 src: InFile<Self>,
306 let types = 214 ) -> Option<Self::ID> {
307 self.resolver.resolve_path_in_type_ns_fully(db, path.mod_path()).map(|ty| match ty { 215 let container = sb.find_container(src.as_ref().map(|it| it.syntax()))?;
308 TypeNs::SelfType(it) => PathResolution::SelfType(it.into()), 216 let db = sb.db;
309 TypeNs::GenericParam(id) => PathResolution::TypeParam(TypeParam { id }), 217 let dyn_map =
310 TypeNs::AdtSelfType(it) | TypeNs::AdtId(it) => { 218 &*sb.child_by_source_cache.entry(container).or_insert_with(|| match container {
311 PathResolution::Def(Adt::from(it).into()) 219 ChildContainer::DefWithBodyId(it) => it.child_by_source(db),
312 } 220 ChildContainer::ModuleId(it) => it.child_by_source(db),
313 TypeNs::EnumVariantId(it) => PathResolution::Def(EnumVariant::from(it).into()), 221 ChildContainer::TraitId(it) => it.child_by_source(db),
314 TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()), 222 ChildContainer::ImplId(it) => it.child_by_source(db),
315 TypeNs::BuiltinType(it) => PathResolution::Def(it.into()), 223 ChildContainer::EnumId(it) => it.child_by_source(db),
316 TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()), 224 ChildContainer::VariantId(it) => it.child_by_source(db),
317 }); 225 ChildContainer::GenericDefId(it) => it.child_by_source(db),
318 let values =
319 self.resolver.resolve_path_in_value_ns_fully(db, path.mod_path()).and_then(|val| {
320 let res = match val {
321 ValueNs::LocalBinding(pat_id) => {
322 let var = Local { parent: self.body_owner?, pat_id };
323 PathResolution::Local(var)
324 }
325 ValueNs::FunctionId(it) => PathResolution::Def(Function::from(it).into()),
326 ValueNs::ConstId(it) => PathResolution::Def(Const::from(it).into()),
327 ValueNs::StaticId(it) => PathResolution::Def(Static::from(it).into()),
328 ValueNs::StructId(it) => PathResolution::Def(Struct::from(it).into()),
329 ValueNs::EnumVariantId(it) => PathResolution::Def(EnumVariant::from(it).into()),
330 };
331 Some(res)
332 }); 226 });
333 227 dyn_map[T::KEY].get(&src).copied()
334 let items = self
335 .resolver
336 .resolve_module_path_in_items(db, path.mod_path())
337 .take_types()
338 .map(|it| PathResolution::Def(it.into()));
339 types.or(values).or(items).or_else(|| {
340 self.resolver
341 .resolve_path_as_macro(db, path.mod_path())
342 .map(|def| PathResolution::Macro(def.into()))
343 })
344 } 228 }
229}
345 230
346 pub fn resolve_path(&self, db: &impl HirDatabase, path: &ast::Path) -> Option<PathResolution> { 231macro_rules! to_id_key_impls {
347 if let Some(path_expr) = path.syntax().parent().and_then(ast::PathExpr::cast) { 232 ($(($id:ident, $ast:path, $key:path)),* ,) => {$(
348 let expr_id = self.expr_id(&path_expr.into())?; 233 impl ToIdByKey for $ast {
349 if let Some(assoc) = self.infer.as_ref()?.assoc_resolutions_for_expr(expr_id) { 234 type ID = $id;
350 return Some(PathResolution::AssocItem(assoc.into())); 235 const KEY: Key<Self, Self::ID> = $key;
351 }
352 } 236 }
353 if let Some(path_pat) = path.syntax().parent().and_then(ast::PathPat::cast) { 237 )*}
354 let pat_id = self.pat_id(&path_pat.into())?; 238}
355 if let Some(assoc) = self.infer.as_ref()?.assoc_resolutions_for_pat(pat_id) {
356 return Some(PathResolution::AssocItem(assoc.into()));
357 }
358 }
359 // This must be a normal source file rather than macro file.
360 let hir_path = crate::Path::from_ast(path.clone())?;
361 self.resolve_hir_path(db, &hir_path)
362 }
363 239
364 fn resolve_local_name(&self, name_ref: &ast::NameRef) -> Option<ScopeEntryWithSyntax> { 240to_id_key_impls![
365 let name = name_ref.as_name(); 241 (StructId, ast::StructDef, keys::STRUCT),
366 let source_map = self.body_source_map.as_ref()?; 242 (UnionId, ast::UnionDef, keys::UNION),
367 let scopes = self.scopes.as_ref()?; 243 (EnumId, ast::EnumDef, keys::ENUM),
368 let scope = scope_for(scopes, source_map, InFile::new(self.file_id, name_ref.syntax()))?; 244 (TraitId, ast::TraitDef, keys::TRAIT),
369 let entry = scopes.resolve_name_in_scope(scope, &name)?; 245 (FunctionId, ast::FnDef, keys::FUNCTION),
370 Some(ScopeEntryWithSyntax { 246 (StaticId, ast::StaticDef, keys::STATIC),
371 name: entry.name().clone(), 247 (ConstId, ast::ConstDef, keys::CONST),
372 ptr: source_map.pat_syntax(entry.pat())?.value, 248 (TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
373 }) 249 (ImplId, ast::ImplBlock, keys::IMPL),
250 (StructFieldId, ast::RecordFieldDef, keys::RECORD_FIELD),
251 (EnumVariantId, ast::EnumVariant, keys::ENUM_VARIANT),
252];
253
254// FIXME: use DynMap as well?
255impl ToId for ast::MacroCall {
256 type ID = MacroDefId;
257 fn to_id<DB: HirDatabase>(
258 sb: &mut SourceBinder<'_, DB>,
259 src: InFile<Self>,
260 ) -> Option<Self::ID> {
261 let kind = MacroDefKind::Declarative;
262
263 let krate = sb.to_module_def(src.file_id.original_file(sb.db))?.id.krate;
264
265 let ast_id =
266 Some(AstId::new(src.file_id, sb.db.ast_id_map(src.file_id).ast_id(&src.value)));
267
268 Some(MacroDefId { krate: Some(krate), ast_id, kind })
374 } 269 }
270}
375 271
376 pub fn process_all_names(&self, db: &impl HirDatabase, f: &mut dyn FnMut(Name, ScopeDef)) { 272impl ToDef for ast::BindPat {
377 self.resolver.process_all_names(db, &mut |name, def| { 273 type Def = Local;
378 let def = match def { 274
379 resolver::ScopeDef::PerNs(it) => it.into(), 275 fn to_def<DB: HirDatabase>(sb: &mut SourceBinder<'_, DB>, src: InFile<Self>) -> Option<Local> {
380 resolver::ScopeDef::ImplSelfType(it) => ScopeDef::ImplSelfType(it.into()), 276 let file_id = src.file_id;
381 resolver::ScopeDef::AdtSelfType(it) => ScopeDef::AdtSelfType(it.into()), 277 let parent: DefWithBodyId = src.value.syntax().ancestors().find_map(|it| {
382 resolver::ScopeDef::GenericParam(id) => ScopeDef::GenericParam(TypeParam { id }), 278 let res = match_ast! {
383 resolver::ScopeDef::Local(pat_id) => { 279 match it {
384 let parent = self.resolver.body_owner().unwrap().into(); 280 ast::ConstDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
385 ScopeDef::Local(Local { parent, pat_id }) 281 ast::StaticDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
282 ast::FnDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
283 _ => return None,
386 } 284 }
387 }; 285 };
388 f(name, def) 286 Some(res)
389 }) 287 })?;
390 } 288 let (_body, source_map) = sb.db.body_with_source_map(parent);
391 289 let src = src.map(ast::Pat::from);
392 // FIXME: we only use this in `inline_local_variable` assist, ideally, we 290 let pat_id = source_map.node_pat(src.as_ref())?;
393 // should switch to general reference search infra there. 291 Some(Local { parent: parent.into(), pat_id })
394 pub fn find_all_refs(&self, pat: &ast::BindPat) -> Vec<ReferenceDescriptor> {
395 let fn_def = pat.syntax().ancestors().find_map(ast::FnDef::cast).unwrap();
396 let ptr = Either::Left(AstPtr::new(&ast::Pat::from(pat.clone())));
397 fn_def
398 .syntax()
399 .descendants()
400 .filter_map(ast::NameRef::cast)
401 .filter(|name_ref| match self.resolve_local_name(&name_ref) {
402 None => false,
403 Some(entry) => entry.ptr() == ptr,
404 })
405 .map(|name_ref| ReferenceDescriptor {
406 name: name_ref.text().to_string(),
407 range: name_ref.syntax().text_range(),
408 })
409 .collect()
410 }
411
412 pub fn iterate_method_candidates<T>(
413 &self,
414 db: &impl HirDatabase,
415 ty: &Type,
416 name: Option<&Name>,
417 mut callback: impl FnMut(&Ty, Function) -> Option<T>,
418 ) -> Option<T> {
419 // There should be no inference vars in types passed here
420 // FIXME check that?
421 // FIXME replace Unknown by bound vars here
422 let canonical = Canonical { value: ty.ty.value.clone(), num_vars: 0 };
423 method_resolution::iterate_method_candidates(
424 &canonical,
425 db,
426 &self.resolver,
427 name,
428 method_resolution::LookupMode::MethodCall,
429 |ty, it| match it {
430 AssocItemId::FunctionId(f) => callback(ty, f.into()),
431 _ => None,
432 },
433 )
434 }
435
436 pub fn iterate_path_candidates<T>(
437 &self,
438 db: &impl HirDatabase,
439 ty: &Type,
440 name: Option<&Name>,
441 mut callback: impl FnMut(&Ty, AssocItem) -> Option<T>,
442 ) -> Option<T> {
443 // There should be no inference vars in types passed here
444 // FIXME check that?
445 // FIXME replace Unknown by bound vars here
446 let canonical = Canonical { value: ty.ty.value.clone(), num_vars: 0 };
447 method_resolution::iterate_method_candidates(
448 &canonical,
449 db,
450 &self.resolver,
451 name,
452 method_resolution::LookupMode::Path,
453 |ty, it| callback(ty, it.into()),
454 )
455 }
456
457 /// Checks that particular type `ty` implements `std::future::Future`.
458 /// This function is used in `.await` syntax completion.
459 pub fn impls_future(&self, db: &impl HirDatabase, ty: Type) -> bool {
460 let std_future_path = path![std::future::Future];
461
462 let std_future_trait = match self.resolver.resolve_known_trait(db, &std_future_path) {
463 Some(it) => it.into(),
464 _ => return false,
465 };
466
467 let krate = match self.resolver.krate() {
468 Some(krate) => krate,
469 _ => return false,
470 };
471
472 let canonical_ty = Canonical { value: ty.ty.value, num_vars: 0 };
473 implements_trait(&canonical_ty, db, &self.resolver, krate.into(), std_future_trait)
474 }
475
476 pub fn expand(
477 &self,
478 db: &impl HirDatabase,
479 macro_call: InFile<&ast::MacroCall>,
480 ) -> Option<Expansion> {
481 let def = self.resolve_macro_call(db, macro_call)?.id;
482 let ast_id = AstId::new(
483 macro_call.file_id,
484 db.ast_id_map(macro_call.file_id).ast_id(macro_call.value),
485 );
486 Some(Expansion { macro_call_id: def.as_call_id(db, MacroCallKind::FnLike(ast_id)) })
487 } 292 }
488} 293}
489 294
490fn scope_for( 295impl ToDef for ast::TypeParam {
491 scopes: &ExprScopes, 296 type Def = TypeParam;
492 source_map: &BodySourceMap, 297
493 node: InFile<&SyntaxNode>, 298 fn to_def<DB: HirDatabase>(
494) -> Option<ScopeId> { 299 sb: &mut SourceBinder<'_, DB>,
495 node.value 300 src: InFile<ast::TypeParam>,
496 .ancestors() 301 ) -> Option<TypeParam> {
497 .filter_map(ast::Expr::cast) 302 let mut sb = SourceBinder::new(sb.db);
498 .filter_map(|it| source_map.node_expr(InFile::new(node.file_id, &it))) 303 let file_id = src.file_id;
499 .find_map(|it| scopes.scope_for(it)) 304 let parent: GenericDefId = src.value.syntax().ancestors().find_map(|it| {
305 let res = match_ast! {
306 match it {
307 ast::FnDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
308 ast::StructDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
309 ast::EnumDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
310 ast::TraitDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
311 ast::TypeAliasDef(value) => { sb.to_id(InFile { value, file_id})?.into() },
312 ast::ImplBlock(value) => { sb.to_id(InFile { value, file_id})?.into() },
313 _ => return None,
314 }
315 };
316 Some(res)
317 })?;
318 let &id = sb.child_by_source(parent.into())[keys::TYPE_PARAM].get(&src)?;
319 Some(TypeParam { id })
320 }
500} 321}
501 322
502fn scope_for_offset( 323impl ToId for ast::Module {
503 scopes: &ExprScopes, 324 type ID = ModuleId;
504 source_map: &BodySourceMap, 325
505 offset: InFile<TextUnit>, 326 fn to_id<DB: HirDatabase>(
506) -> Option<ScopeId> { 327 sb: &mut SourceBinder<'_, DB>,
507 scopes 328 src: InFile<ast::Module>,
508 .scope_by_expr() 329 ) -> Option<ModuleId> {
509 .iter() 330 {
510 .filter_map(|(id, scope)| { 331 let _p = profile("ast::Module::to_def");
511 let source = source_map.expr_syntax(*id)?; 332 let parent_declaration = src
512 // FIXME: correctly handle macro expansion 333 .as_ref()
513 if source.file_id != offset.file_id { 334 .map(|it| it.syntax())
514 return None; 335 .cloned()
515 } 336 .ancestors_with_macros(sb.db)
516 let syntax_node_ptr = 337 .skip(1)
517 source.value.either(|it| it.syntax_node_ptr(), |it| it.syntax_node_ptr()); 338 .find_map(|it| {
518 Some((syntax_node_ptr, scope)) 339 let m = ast::Module::cast(it.value.clone())?;
519 }) 340 Some(it.with_value(m))
520 // find containing scope 341 });
521 .min_by_key(|(ptr, _scope)| { 342
522 ( 343 let parent_module = match parent_declaration {
523 !(ptr.range().start() <= offset.value && offset.value <= ptr.range().end()), 344 Some(parent_declaration) => sb.to_id(parent_declaration)?,
524 ptr.range().len(), 345 None => {
525 ) 346 let file_id = src.file_id.original_file(sb.db);
526 }) 347 sb.to_module_def(file_id)?.id
527 .map(|(ptr, scope)| { 348 }
528 adjust(scopes, source_map, ptr, offset.file_id, offset.value).unwrap_or(*scope) 349 };
529 })
530}
531 350
532// XXX: during completion, cursor might be outside of any particular 351 let child_name = src.value.name()?.as_name();
533// expression. Try to figure out the correct scope... 352 let def_map = sb.db.crate_def_map(parent_module.krate);
534fn adjust( 353 let child_id = *def_map[parent_module.local_id].children.get(&child_name)?;
535 scopes: &ExprScopes, 354 Some(ModuleId { krate: parent_module.krate, local_id: child_id })
536 source_map: &BodySourceMap, 355 }
537 ptr: SyntaxNodePtr, 356 }
538 file_id: HirFileId,
539 offset: TextUnit,
540) -> Option<ScopeId> {
541 let r = ptr.range();
542 let child_scopes = scopes
543 .scope_by_expr()
544 .iter()
545 .filter_map(|(id, scope)| {
546 let source = source_map.expr_syntax(*id)?;
547 // FIXME: correctly handle macro expansion
548 if source.file_id != file_id {
549 return None;
550 }
551 let syntax_node_ptr =
552 source.value.either(|it| it.syntax_node_ptr(), |it| it.syntax_node_ptr());
553 Some((syntax_node_ptr, scope))
554 })
555 .map(|(ptr, scope)| (ptr.range(), scope))
556 .filter(|(range, _)| range.start() <= offset && range.is_subrange(&r) && *range != r);
557
558 child_scopes
559 .max_by(|(r1, _), (r2, _)| {
560 if r2.is_subrange(&r1) {
561 std::cmp::Ordering::Greater
562 } else if r1.is_subrange(&r2) {
563 std::cmp::Ordering::Less
564 } else {
565 r1.start().cmp(&r2.start())
566 }
567 })
568 .map(|(_ptr, scope)| *scope)
569} 357}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-04 02:13:57 +0000