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-rw-r--r--crates/ra_hir/src/code_model.rs94
-rw-r--r--crates/ra_hir/src/from_source.rs265
-rw-r--r--crates/ra_hir/src/lib.rs8
-rw-r--r--crates/ra_hir/src/source_analyzer.rs450
-rw-r--r--crates/ra_hir/src/source_binder.rs828
5 files changed, 850 insertions, 795 deletions
diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index a177cebca..500b34c17 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -7,7 +7,6 @@ use hir_def::{
7 builtin_type::BuiltinType, 7 builtin_type::BuiltinType,
8 docs::Documentation, 8 docs::Documentation,
9 expr::{BindingAnnotation, Pat, PatId}, 9 expr::{BindingAnnotation, Pat, PatId},
10 nameres::ModuleSource,
11 per_ns::PerNs, 10 per_ns::PerNs,
12 resolver::HasResolver, 11 resolver::HasResolver,
13 type_ref::{Mutability, TypeRef}, 12 type_ref::{Mutability, TypeRef},
@@ -21,8 +20,8 @@ use hir_expand::{
21 MacroDefId, 20 MacroDefId,
22}; 21};
23use hir_ty::{ 22use hir_ty::{
24 autoderef, display::HirFormatter, expr::ExprValidator, ApplicationTy, Canonical, InEnvironment, 23 autoderef, display::HirFormatter, expr::ExprValidator, method_resolution, ApplicationTy,
25 TraitEnvironment, Ty, TyDefId, TypeCtor, TypeWalk, 24 Canonical, InEnvironment, TraitEnvironment, Ty, TyDefId, TypeCtor, TypeWalk,
26}; 25};
27use ra_db::{CrateId, Edition, FileId}; 26use ra_db::{CrateId, Edition, FileId};
28use ra_prof::profile; 27use ra_prof::profile;
@@ -120,7 +119,8 @@ impl_froms!(
120 BuiltinType 119 BuiltinType
121); 120);
122 121
123pub use hir_def::{attr::Attrs, visibility::Visibility}; 122pub use hir_def::{attr::Attrs, visibility::Visibility, AssocItemId};
123use rustc_hash::FxHashSet;
124 124
125impl Module { 125impl Module {
126 pub(crate) fn new(krate: Crate, crate_module_id: LocalModuleId) -> Module { 126 pub(crate) fn new(krate: Crate, crate_module_id: LocalModuleId) -> Module {
@@ -192,13 +192,14 @@ impl Module {
192 192
193 pub fn diagnostics(self, db: &impl HirDatabase, sink: &mut DiagnosticSink) { 193 pub fn diagnostics(self, db: &impl HirDatabase, sink: &mut DiagnosticSink) {
194 let _p = profile("Module::diagnostics"); 194 let _p = profile("Module::diagnostics");
195 db.crate_def_map(self.id.krate).add_diagnostics(db, self.id.local_id, sink); 195 let crate_def_map = db.crate_def_map(self.id.krate);
196 crate_def_map.add_diagnostics(db, self.id.local_id, sink);
196 for decl in self.declarations(db) { 197 for decl in self.declarations(db) {
197 match decl { 198 match decl {
198 crate::ModuleDef::Function(f) => f.diagnostics(db, sink), 199 crate::ModuleDef::Function(f) => f.diagnostics(db, sink),
199 crate::ModuleDef::Module(m) => { 200 crate::ModuleDef::Module(m) => {
200 // Only add diagnostics from inline modules 201 // Only add diagnostics from inline modules
201 if let ModuleSource::Module(_) = m.definition_source(db).value { 202 if crate_def_map[m.id.local_id].origin.is_inline() {
202 m.diagnostics(db, sink) 203 m.diagnostics(db, sink)
203 } 204 }
204 } 205 }
@@ -878,6 +879,28 @@ impl Type {
878 } 879 }
879 } 880 }
880 881
882 /// Checks that particular type `ty` implements `std::future::Future`.
883 /// This function is used in `.await` syntax completion.
884 pub fn impls_future(&self, db: &impl HirDatabase) -> bool {
885 let krate = self.krate;
886
887 let std_future_trait =
888 db.lang_item(krate, "future_trait".into()).and_then(|it| it.as_trait());
889 let std_future_trait = match std_future_trait {
890 Some(it) => it,
891 None => return false,
892 };
893
894 let canonical_ty = Canonical { value: self.ty.value.clone(), num_vars: 0 };
895 method_resolution::implements_trait(
896 &canonical_ty,
897 db,
898 self.ty.environment.clone(),
899 krate,
900 std_future_trait,
901 )
902 }
903
881 // FIXME: this method is broken, as it doesn't take closures into account. 904 // FIXME: this method is broken, as it doesn't take closures into account.
882 pub fn as_callable(&self) -> Option<CallableDef> { 905 pub fn as_callable(&self) -> Option<CallableDef> {
883 Some(self.ty.value.as_callable()?.0) 906 Some(self.ty.value.as_callable()?.0)
@@ -986,6 +1009,65 @@ impl Type {
986 None 1009 None
987 } 1010 }
988 1011
1012 pub fn iterate_method_candidates<T>(
1013 &self,
1014 db: &impl HirDatabase,
1015 krate: Crate,
1016 traits_in_scope: &FxHashSet<TraitId>,
1017 name: Option<&Name>,
1018 mut callback: impl FnMut(&Ty, Function) -> Option<T>,
1019 ) -> Option<T> {
1020 // There should be no inference vars in types passed here
1021 // FIXME check that?
1022 // FIXME replace Unknown by bound vars here
1023 let canonical = Canonical { value: self.ty.value.clone(), num_vars: 0 };
1024
1025 let env = self.ty.environment.clone();
1026 let krate = krate.id;
1027
1028 method_resolution::iterate_method_candidates(
1029 &canonical,
1030 db,
1031 env,
1032 krate,
1033 traits_in_scope,
1034 name,
1035 method_resolution::LookupMode::MethodCall,
1036 |ty, it| match it {
1037 AssocItemId::FunctionId(f) => callback(ty, f.into()),
1038 _ => None,
1039 },
1040 )
1041 }
1042
1043 pub fn iterate_path_candidates<T>(
1044 &self,
1045 db: &impl HirDatabase,
1046 krate: Crate,
1047 traits_in_scope: &FxHashSet<TraitId>,
1048 name: Option<&Name>,
1049 mut callback: impl FnMut(&Ty, AssocItem) -> Option<T>,
1050 ) -> Option<T> {
1051 // There should be no inference vars in types passed here
1052 // FIXME check that?
1053 // FIXME replace Unknown by bound vars here
1054 let canonical = Canonical { value: self.ty.value.clone(), num_vars: 0 };
1055
1056 let env = self.ty.environment.clone();
1057 let krate = krate.id;
1058
1059 method_resolution::iterate_method_candidates(
1060 &canonical,
1061 db,
1062 env,
1063 krate,
1064 traits_in_scope,
1065 name,
1066 method_resolution::LookupMode::Path,
1067 |ty, it| callback(ty, it.into()),
1068 )
1069 }
1070
989 pub fn as_adt(&self) -> Option<Adt> { 1071 pub fn as_adt(&self) -> Option<Adt> {
990 let (adt, _subst) = self.ty.value.as_adt()?; 1072 let (adt, _subst) = self.ty.value.as_adt()?;
991 Some(adt.into()) 1073 Some(adt.into())
diff --git a/crates/ra_hir/src/from_source.rs b/crates/ra_hir/src/from_source.rs
deleted file mode 100644
index 6314be8d4..000000000
--- a/crates/ra_hir/src/from_source.rs
+++ /dev/null
@@ -1,265 +0,0 @@
1//! Finds a corresponding hir data structure for a syntax node in a specific
2//! file.
3
4use hir_def::{
5 child_by_source::ChildBySource, dyn_map::DynMap, keys, keys::Key, nameres::ModuleSource,
6 ConstId, DefWithBodyId, EnumId, EnumVariantId, FunctionId, GenericDefId, ImplId, ModuleId,
7 StaticId, StructId, TraitId, TypeAliasId, UnionId, VariantId,
8};
9use hir_expand::{name::AsName, AstId, MacroDefId, MacroDefKind};
10use ra_db::FileId;
11use ra_prof::profile;
12use ra_syntax::{
13 ast::{self, AstNode, NameOwner},
14 match_ast, SyntaxNode,
15};
16
17use crate::{
18 db::{DefDatabase, HirDatabase},
19 Const, DefWithBody, Enum, EnumVariant, FieldSource, Function, ImplBlock, InFile, Local,
20 MacroDef, Module, Static, Struct, StructField, Trait, TypeAlias, TypeParam, Union,
21};
22
23pub trait FromSource: Sized {
24 type Ast;
25 fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self>;
26}
27
28pub trait FromSourceByContainer: Sized {
29 type Ast: AstNode + 'static;
30 type Id: Copy + 'static;
31 const KEY: Key<Self::Ast, Self::Id>;
32}
33
34impl<T: FromSourceByContainer> FromSource for T
35where
36 T: From<<T as FromSourceByContainer>::Id>,
37{
38 type Ast = <T as FromSourceByContainer>::Ast;
39 fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
40 analyze_container(db, src.as_ref().map(|it| it.syntax()))[T::KEY]
41 .get(&src)
42 .copied()
43 .map(Self::from)
44 }
45}
46
47macro_rules! from_source_by_container_impls {
48 ($(($hir:ident, $id:ident, $ast:path, $key:path)),* ,) => {$(
49 impl FromSourceByContainer for $hir {
50 type Ast = $ast;
51 type Id = $id;
52 const KEY: Key<Self::Ast, Self::Id> = $key;
53 }
54 )*}
55}
56
57from_source_by_container_impls![
58 (Struct, StructId, ast::StructDef, keys::STRUCT),
59 (Union, UnionId, ast::UnionDef, keys::UNION),
60 (Enum, EnumId, ast::EnumDef, keys::ENUM),
61 (Trait, TraitId, ast::TraitDef, keys::TRAIT),
62 (Function, FunctionId, ast::FnDef, keys::FUNCTION),
63 (Static, StaticId, ast::StaticDef, keys::STATIC),
64 (Const, ConstId, ast::ConstDef, keys::CONST),
65 (TypeAlias, TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
66 (ImplBlock, ImplId, ast::ImplBlock, keys::IMPL),
67];
68
69impl FromSource for MacroDef {
70 type Ast = ast::MacroCall;
71 fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
72 let kind = MacroDefKind::Declarative;
73
74 let module_src = ModuleSource::from_child_node(db, src.as_ref().map(|it| it.syntax()));
75 let module = Module::from_definition(db, InFile::new(src.file_id, module_src))?;
76 let krate = Some(module.krate().id);
77
78 let ast_id = Some(AstId::new(src.file_id, db.ast_id_map(src.file_id).ast_id(&src.value)));
79
80 let id: MacroDefId = MacroDefId { krate, ast_id, kind };
81 Some(MacroDef { id })
82 }
83}
84
85impl FromSource for EnumVariant {
86 type Ast = ast::EnumVariant;
87 fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
88 let parent_enum = src.value.parent_enum();
89 let src_enum = InFile { file_id: src.file_id, value: parent_enum };
90 let parent_enum = Enum::from_source(db, src_enum)?;
91 parent_enum.id.child_by_source(db)[keys::ENUM_VARIANT]
92 .get(&src)
93 .copied()
94 .map(EnumVariant::from)
95 }
96}
97
98impl FromSource for StructField {
99 type Ast = FieldSource;
100 fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
101 let src = src.as_ref();
102
103 // FIXME this is buggy
104 let variant_id: VariantId = match src.value {
105 FieldSource::Named(field) => {
106 let value = field.syntax().ancestors().find_map(ast::StructDef::cast)?;
107 let src = InFile { file_id: src.file_id, value };
108 let def = Struct::from_source(db, src)?;
109 def.id.into()
110 }
111 FieldSource::Pos(field) => {
112 let value = field.syntax().ancestors().find_map(ast::EnumVariant::cast)?;
113 let src = InFile { file_id: src.file_id, value };
114 let def = EnumVariant::from_source(db, src)?;
115 EnumVariantId::from(def).into()
116 }
117 };
118
119 let dyn_map = variant_id.child_by_source(db);
120 match src.value {
121 FieldSource::Pos(it) => dyn_map[keys::TUPLE_FIELD].get(&src.with_value(it.clone())),
122 FieldSource::Named(it) => dyn_map[keys::RECORD_FIELD].get(&src.with_value(it.clone())),
123 }
124 .copied()
125 .map(StructField::from)
126 }
127}
128
129impl Local {
130 pub fn from_source(db: &impl HirDatabase, src: InFile<ast::BindPat>) -> Option<Self> {
131 let file_id = src.file_id;
132 let parent: DefWithBody = src.value.syntax().ancestors().find_map(|it| {
133 let res = match_ast! {
134 match it {
135 ast::ConstDef(value) => { Const::from_source(db, InFile { value, file_id})?.into() },
136 ast::StaticDef(value) => { Static::from_source(db, InFile { value, file_id})?.into() },
137 ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.into() },
138 _ => return None,
139 }
140 };
141 Some(res)
142 })?;
143 let (_body, source_map) = db.body_with_source_map(parent.into());
144 let src = src.map(ast::Pat::from);
145 let pat_id = source_map.node_pat(src.as_ref())?;
146 Some(Local { parent, pat_id })
147 }
148}
149
150impl TypeParam {
151 pub fn from_source(db: &impl HirDatabase, src: InFile<ast::TypeParam>) -> Option<Self> {
152 let file_id = src.file_id;
153 let parent: GenericDefId = src.value.syntax().ancestors().find_map(|it| {
154 let res = match_ast! {
155 match it {
156 ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.id.into() },
157 ast::StructDef(value) => { Struct::from_source(db, InFile { value, file_id})?.id.into() },
158 ast::EnumDef(value) => { Enum::from_source(db, InFile { value, file_id})?.id.into() },
159 ast::TraitDef(value) => { Trait::from_source(db, InFile { value, file_id})?.id.into() },
160 ast::TypeAliasDef(value) => { TypeAlias::from_source(db, InFile { value, file_id})?.id.into() },
161 ast::ImplBlock(value) => { ImplBlock::from_source(db, InFile { value, file_id})?.id.into() },
162 _ => return None,
163 }
164 };
165 Some(res)
166 })?;
167 let &id = parent.child_by_source(db)[keys::TYPE_PARAM].get(&src)?;
168 Some(TypeParam { id })
169 }
170}
171
172impl Module {
173 pub fn from_declaration(db: &impl DefDatabase, src: InFile<ast::Module>) -> Option<Self> {
174 let _p = profile("Module::from_declaration");
175 let parent_declaration = src.value.syntax().ancestors().skip(1).find_map(ast::Module::cast);
176
177 let parent_module = match parent_declaration {
178 Some(parent_declaration) => {
179 let src_parent = InFile { file_id: src.file_id, value: parent_declaration };
180 Module::from_declaration(db, src_parent)
181 }
182 None => {
183 let source_file = db.parse(src.file_id.original_file(db)).tree();
184 let src_parent =
185 InFile { file_id: src.file_id, value: ModuleSource::SourceFile(source_file) };
186 Module::from_definition(db, src_parent)
187 }
188 }?;
189
190 let child_name = src.value.name()?.as_name();
191 let def_map = db.crate_def_map(parent_module.id.krate);
192 let child_id = def_map[parent_module.id.local_id].children.get(&child_name)?;
193 Some(parent_module.with_module_id(*child_id))
194 }
195
196 pub fn from_definition(db: &impl DefDatabase, src: InFile<ModuleSource>) -> Option<Self> {
197 let _p = profile("Module::from_definition");
198 match src.value {
199 ModuleSource::Module(ref module) => {
200 assert!(!module.has_semi());
201 return Module::from_declaration(
202 db,
203 InFile { file_id: src.file_id, value: module.clone() },
204 );
205 }
206 ModuleSource::SourceFile(_) => (),
207 };
208
209 let original_file = src.file_id.original_file(db);
210 Module::from_file(db, original_file)
211 }
212
213 fn from_file(db: &impl DefDatabase, file: FileId) -> Option<Self> {
214 let _p = profile("Module::from_file");
215 let (krate, local_id) = db.relevant_crates(file).iter().find_map(|&crate_id| {
216 let crate_def_map = db.crate_def_map(crate_id);
217 let local_id = crate_def_map.modules_for_file(file).next()?;
218 Some((crate_id, local_id))
219 })?;
220 Some(Module { id: ModuleId { krate, local_id } })
221 }
222}
223
224fn analyze_container(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> DynMap {
225 let _p = profile("analyze_container");
226 return child_by_source(db, src).unwrap_or_default();
227
228 fn child_by_source(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> Option<DynMap> {
229 for container in src.value.ancestors().skip(1) {
230 let res = match_ast! {
231 match container {
232 ast::TraitDef(it) => {
233 let def = Trait::from_source(db, src.with_value(it))?;
234 def.id.child_by_source(db)
235 },
236 ast::ImplBlock(it) => {
237 let def = ImplBlock::from_source(db, src.with_value(it))?;
238 def.id.child_by_source(db)
239 },
240 ast::FnDef(it) => {
241 let def = Function::from_source(db, src.with_value(it))?;
242 DefWithBodyId::from(def.id)
243 .child_by_source(db)
244 },
245 ast::StaticDef(it) => {
246 let def = Static::from_source(db, src.with_value(it))?;
247 DefWithBodyId::from(def.id)
248 .child_by_source(db)
249 },
250 ast::ConstDef(it) => {
251 let def = Const::from_source(db, src.with_value(it))?;
252 DefWithBodyId::from(def.id)
253 .child_by_source(db)
254 },
255 _ => { continue },
256 }
257 };
258 return Some(res);
259 }
260
261 let module_source = ModuleSource::from_child_node(db, src);
262 let c = Module::from_definition(db, src.with_value(module_source))?;
263 Some(c.id.child_by_source(db))
264 }
265}
diff --git a/crates/ra_hir/src/lib.rs b/crates/ra_hir/src/lib.rs
index 3d13978d4..e1c7b7a20 100644
--- a/crates/ra_hir/src/lib.rs
+++ b/crates/ra_hir/src/lib.rs
@@ -8,7 +8,7 @@
8#![recursion_limit = "512"] 8#![recursion_limit = "512"]
9 9
10macro_rules! impl_froms { 10macro_rules! impl_froms {
11 ($e:ident: $($v:ident $(($($sv:ident),*))?),*) => { 11 ($e:ident: $($v:ident $(($($sv:ident),*))?),*$(,)?) => {
12 $( 12 $(
13 impl From<$v> for $e { 13 impl From<$v> for $e {
14 fn from(it: $v) -> $e { 14 fn from(it: $v) -> $e {
@@ -27,6 +27,7 @@ macro_rules! impl_froms {
27} 27}
28 28
29pub mod db; 29pub mod db;
30pub mod source_analyzer;
30pub mod source_binder; 31pub mod source_binder;
31 32
32pub mod diagnostics; 33pub mod diagnostics;
@@ -35,7 +36,6 @@ mod from_id;
35mod code_model; 36mod code_model;
36 37
37mod has_source; 38mod has_source;
38mod from_source;
39 39
40pub use crate::{ 40pub use crate::{
41 code_model::{ 41 code_model::{
@@ -44,9 +44,9 @@ pub use crate::{
44 MacroDef, Module, ModuleDef, ScopeDef, Static, Struct, StructField, Trait, Type, TypeAlias, 44 MacroDef, Module, ModuleDef, ScopeDef, Static, Struct, StructField, Trait, Type, TypeAlias,
45 TypeParam, Union, VariantDef, 45 TypeParam, Union, VariantDef,
46 }, 46 },
47 from_source::FromSource,
48 has_source::HasSource, 47 has_source::HasSource,
49 source_binder::{PathResolution, ScopeEntryWithSyntax, SourceAnalyzer}, 48 source_analyzer::{PathResolution, ScopeEntryWithSyntax, SourceAnalyzer},
49 source_binder::SourceBinder,
50}; 50};
51 51
52pub use hir_def::{ 52pub use hir_def::{
diff --git a/crates/ra_hir/src/source_analyzer.rs b/crates/ra_hir/src/source_analyzer.rs
new file mode 100644
index 000000000..4f8fc9602
--- /dev/null
+++ b/crates/ra_hir/src/source_analyzer.rs
@@ -0,0 +1,450 @@
1//! Lookup hir elements using positions in the source code. This is a lossy
2//! transformation: in general, a single source might correspond to several
3//! modules, functions, etc, due to macros, cfgs and `#[path=]` attributes on
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::{
12 body::{
13 scope::{ExprScopes, ScopeId},
14 BodySourceMap,
15 },
16 expr::{ExprId, PatId},
17 resolver::{self, resolver_for_scope, Resolver, TypeNs, ValueNs},
18 DefWithBodyId, TraitId,
19};
20use hir_expand::{
21 hygiene::Hygiene, name::AsName, AstId, HirFileId, InFile, MacroCallId, MacroCallKind,
22};
23use hir_ty::{InEnvironment, InferenceResult, TraitEnvironment};
24use ra_syntax::{
25 ast::{self, AstNode},
26 AstPtr, SyntaxNode, SyntaxNodePtr, SyntaxToken, TextRange, TextUnit,
27};
28use rustc_hash::FxHashSet;
29
30use crate::{
31 db::HirDatabase, Adt, Const, DefWithBody, EnumVariant, Function, Local, MacroDef, Name, Path,
32 ScopeDef, Static, Struct, Trait, Type, TypeAlias, TypeParam,
33};
34
35/// `SourceAnalyzer` is a convenience wrapper which exposes HIR API in terms of
36/// original source files. It should not be used inside the HIR itself.
37#[derive(Debug)]
38pub struct SourceAnalyzer {
39 file_id: HirFileId,
40 resolver: Resolver,
41 body_owner: Option<DefWithBody>,
42 body_source_map: Option<Arc<BodySourceMap>>,
43 infer: Option<Arc<InferenceResult>>,
44 scopes: Option<Arc<ExprScopes>>,
45}
46
47#[derive(Debug, Clone, PartialEq, Eq)]
48pub enum PathResolution {
49 /// An item
50 Def(crate::ModuleDef),
51 /// A local binding (only value namespace)
52 Local(Local),
53 /// A generic parameter
54 TypeParam(TypeParam),
55 SelfType(crate::ImplBlock),
56 Macro(MacroDef),
57 AssocItem(crate::AssocItem),
58}
59
60#[derive(Debug, Clone, PartialEq, Eq)]
61pub struct ScopeEntryWithSyntax {
62 pub(crate) name: Name,
63 pub(crate) ptr: Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>>,
64}
65
66impl ScopeEntryWithSyntax {
67 pub fn name(&self) -> &Name {
68 &self.name
69 }
70
71 pub fn ptr(&self) -> Either<AstPtr<ast::Pat>, AstPtr<ast::SelfParam>> {
72 self.ptr
73 }
74}
75
76#[derive(Debug)]
77pub struct ReferenceDescriptor {
78 pub range: TextRange,
79 pub name: String,
80}
81
82#[derive(Debug)]
83pub struct Expansion {
84 macro_call_id: MacroCallId,
85}
86
87impl Expansion {
88 pub fn map_token_down(
89 &self,
90 db: &impl HirDatabase,
91 token: InFile<&SyntaxToken>,
92 ) -> Option<InFile<SyntaxToken>> {
93 let exp_info = self.file_id().expansion_info(db)?;
94 exp_info.map_token_down(token)
95 }
96
97 pub fn file_id(&self) -> HirFileId {
98 self.macro_call_id.as_file()
99 }
100}
101
102impl SourceAnalyzer {
103 pub fn new(
104 db: &impl HirDatabase,
105 node: InFile<&SyntaxNode>,
106 offset: Option<TextUnit>,
107 ) -> SourceAnalyzer {
108 crate::source_binder::SourceBinder::new(db).analyze(node, offset)
109 }
110
111 pub(crate) fn new_for_body(
112 db: &impl HirDatabase,
113 def: DefWithBodyId,
114 node: InFile<&SyntaxNode>,
115 offset: Option<TextUnit>,
116 ) -> SourceAnalyzer {
117 let (_body, source_map) = db.body_with_source_map(def);
118 let scopes = db.expr_scopes(def);
119 let scope = match offset {
120 None => scope_for(&scopes, &source_map, node),
121 Some(offset) => scope_for_offset(&scopes, &source_map, node.with_value(offset)),
122 };
123 let resolver = resolver_for_scope(db, def, scope);
124 SourceAnalyzer {
125 resolver,
126 body_owner: Some(def.into()),
127 body_source_map: Some(source_map),
128 infer: Some(db.infer(def)),
129 scopes: Some(scopes),
130 file_id: node.file_id,
131 }
132 }
133
134 pub(crate) fn new_for_resolver(
135 resolver: Resolver,
136 node: InFile<&SyntaxNode>,
137 ) -> SourceAnalyzer {
138 SourceAnalyzer {
139 resolver,
140 body_owner: None,
141 body_source_map: None,
142 infer: None,
143 scopes: None,
144 file_id: node.file_id,
145 }
146 }
147
148 pub fn module(&self) -> Option<crate::code_model::Module> {
149 Some(crate::code_model::Module { id: self.resolver.module()? })
150 }
151
152 fn expr_id(&self, expr: &ast::Expr) -> Option<ExprId> {
153 let src = InFile { file_id: self.file_id, value: expr };
154 self.body_source_map.as_ref()?.node_expr(src)
155 }
156
157 fn pat_id(&self, pat: &ast::Pat) -> Option<PatId> {
158 let src = InFile { file_id: self.file_id, value: pat };
159 self.body_source_map.as_ref()?.node_pat(src)
160 }
161
162 fn expand_expr(
163 &self,
164 db: &impl HirDatabase,
165 expr: InFile<&ast::Expr>,
166 ) -> Option<InFile<ast::Expr>> {
167 let macro_call = ast::MacroCall::cast(expr.value.syntax().clone())?;
168 let macro_file =
169 self.body_source_map.as_ref()?.node_macro_file(expr.with_value(&macro_call))?;
170 let expanded = db.parse_or_expand(macro_file)?;
171 let kind = expanded.kind();
172 let expr = InFile::new(macro_file, ast::Expr::cast(expanded)?);
173
174 if ast::MacroCall::can_cast(kind) {
175 self.expand_expr(db, expr.as_ref())
176 } else {
177 Some(expr)
178 }
179 }
180
181 pub fn type_of(&self, db: &impl HirDatabase, expr: &ast::Expr) -> Option<Type> {
182 let expr_id = if let Some(expr) = self.expand_expr(db, InFile::new(self.file_id, expr)) {
183 self.body_source_map.as_ref()?.node_expr(expr.as_ref())?
184 } else {
185 self.expr_id(expr)?
186 };
187
188 let ty = self.infer.as_ref()?[expr_id].clone();
189 let environment = TraitEnvironment::lower(db, &self.resolver);
190 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
191 }
192
193 pub fn type_of_pat(&self, db: &impl HirDatabase, pat: &ast::Pat) -> Option<Type> {
194 let pat_id = self.pat_id(pat)?;
195 let ty = self.infer.as_ref()?[pat_id].clone();
196 let environment = TraitEnvironment::lower(db, &self.resolver);
197 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
198 }
199
200 pub fn resolve_method_call(&self, call: &ast::MethodCallExpr) -> Option<Function> {
201 let expr_id = self.expr_id(&call.clone().into())?;
202 self.infer.as_ref()?.method_resolution(expr_id).map(Function::from)
203 }
204
205 pub fn resolve_field(&self, field: &ast::FieldExpr) -> Option<crate::StructField> {
206 let expr_id = self.expr_id(&field.clone().into())?;
207 self.infer.as_ref()?.field_resolution(expr_id).map(|it| it.into())
208 }
209
210 pub fn resolve_record_field(&self, field: &ast::RecordField) -> Option<crate::StructField> {
211 let expr_id = match field.expr() {
212 Some(it) => self.expr_id(&it)?,
213 None => {
214 let src = InFile { file_id: self.file_id, value: field };
215 self.body_source_map.as_ref()?.field_init_shorthand_expr(src)?
216 }
217 };
218 self.infer.as_ref()?.record_field_resolution(expr_id).map(|it| it.into())
219 }
220
221 pub fn resolve_record_literal(&self, record_lit: &ast::RecordLit) -> Option<crate::VariantDef> {
222 let expr_id = self.expr_id(&record_lit.clone().into())?;
223 self.infer.as_ref()?.variant_resolution_for_expr(expr_id).map(|it| it.into())
224 }
225
226 pub fn resolve_record_pattern(&self, record_pat: &ast::RecordPat) -> Option<crate::VariantDef> {
227 let pat_id = self.pat_id(&record_pat.clone().into())?;
228 self.infer.as_ref()?.variant_resolution_for_pat(pat_id).map(|it| it.into())
229 }
230
231 pub fn resolve_macro_call(
232 &self,
233 db: &impl HirDatabase,
234 macro_call: InFile<&ast::MacroCall>,
235 ) -> Option<MacroDef> {
236 let hygiene = Hygiene::new(db, macro_call.file_id);
237 let path = macro_call.value.path().and_then(|ast| Path::from_src(ast, &hygiene))?;
238 self.resolver.resolve_path_as_macro(db, path.mod_path()).map(|it| it.into())
239 }
240
241 pub fn resolve_hir_path(
242 &self,
243 db: &impl HirDatabase,
244 path: &crate::Path,
245 ) -> Option<PathResolution> {
246 let types =
247 self.resolver.resolve_path_in_type_ns_fully(db, path.mod_path()).map(|ty| match ty {
248 TypeNs::SelfType(it) => PathResolution::SelfType(it.into()),
249 TypeNs::GenericParam(id) => PathResolution::TypeParam(TypeParam { id }),
250 TypeNs::AdtSelfType(it) | TypeNs::AdtId(it) => {
251 PathResolution::Def(Adt::from(it).into())
252 }
253 TypeNs::EnumVariantId(it) => PathResolution::Def(EnumVariant::from(it).into()),
254 TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()),
255 TypeNs::BuiltinType(it) => PathResolution::Def(it.into()),
256 TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()),
257 });
258 let values =
259 self.resolver.resolve_path_in_value_ns_fully(db, path.mod_path()).and_then(|val| {
260 let res = match val {
261 ValueNs::LocalBinding(pat_id) => {
262 let var = Local { parent: self.body_owner?, pat_id };
263 PathResolution::Local(var)
264 }
265 ValueNs::FunctionId(it) => PathResolution::Def(Function::from(it).into()),
266 ValueNs::ConstId(it) => PathResolution::Def(Const::from(it).into()),
267 ValueNs::StaticId(it) => PathResolution::Def(Static::from(it).into()),
268 ValueNs::StructId(it) => PathResolution::Def(Struct::from(it).into()),
269 ValueNs::EnumVariantId(it) => PathResolution::Def(EnumVariant::from(it).into()),
270 };
271 Some(res)
272 });
273
274 let items = self
275 .resolver
276 .resolve_module_path_in_items(db, path.mod_path())
277 .take_types()
278 .map(|it| PathResolution::Def(it.into()));
279 types.or(values).or(items).or_else(|| {
280 self.resolver
281 .resolve_path_as_macro(db, path.mod_path())
282 .map(|def| PathResolution::Macro(def.into()))
283 })
284 }
285
286 pub fn resolve_path(&self, db: &impl HirDatabase, path: &ast::Path) -> Option<PathResolution> {
287 if let Some(path_expr) = path.syntax().parent().and_then(ast::PathExpr::cast) {
288 let expr_id = self.expr_id(&path_expr.into())?;
289 if let Some(assoc) = self.infer.as_ref()?.assoc_resolutions_for_expr(expr_id) {
290 return Some(PathResolution::AssocItem(assoc.into()));
291 }
292 }
293 if let Some(path_pat) = path.syntax().parent().and_then(ast::PathPat::cast) {
294 let pat_id = self.pat_id(&path_pat.into())?;
295 if let Some(assoc) = self.infer.as_ref()?.assoc_resolutions_for_pat(pat_id) {
296 return Some(PathResolution::AssocItem(assoc.into()));
297 }
298 }
299 // This must be a normal source file rather than macro file.
300 let hir_path = crate::Path::from_ast(path.clone())?;
301 self.resolve_hir_path(db, &hir_path)
302 }
303
304 fn resolve_local_name(&self, name_ref: &ast::NameRef) -> Option<ScopeEntryWithSyntax> {
305 let name = name_ref.as_name();
306 let source_map = self.body_source_map.as_ref()?;
307 let scopes = self.scopes.as_ref()?;
308 let scope = scope_for(scopes, source_map, InFile::new(self.file_id, name_ref.syntax()))?;
309 let entry = scopes.resolve_name_in_scope(scope, &name)?;
310 Some(ScopeEntryWithSyntax {
311 name: entry.name().clone(),
312 ptr: source_map.pat_syntax(entry.pat())?.value,
313 })
314 }
315
316 pub fn process_all_names(&self, db: &impl HirDatabase, f: &mut dyn FnMut(Name, ScopeDef)) {
317 self.resolver.process_all_names(db, &mut |name, def| {
318 let def = match def {
319 resolver::ScopeDef::PerNs(it) => it.into(),
320 resolver::ScopeDef::ImplSelfType(it) => ScopeDef::ImplSelfType(it.into()),
321 resolver::ScopeDef::AdtSelfType(it) => ScopeDef::AdtSelfType(it.into()),
322 resolver::ScopeDef::GenericParam(id) => ScopeDef::GenericParam(TypeParam { id }),
323 resolver::ScopeDef::Local(pat_id) => {
324 let parent = self.resolver.body_owner().unwrap().into();
325 ScopeDef::Local(Local { parent, pat_id })
326 }
327 };
328 f(name, def)
329 })
330 }
331
332 // FIXME: we only use this in `inline_local_variable` assist, ideally, we
333 // should switch to general reference search infra there.
334 pub fn find_all_refs(&self, pat: &ast::BindPat) -> Vec<ReferenceDescriptor> {
335 let fn_def = pat.syntax().ancestors().find_map(ast::FnDef::cast).unwrap();
336 let ptr = Either::Left(AstPtr::new(&ast::Pat::from(pat.clone())));
337 fn_def
338 .syntax()
339 .descendants()
340 .filter_map(ast::NameRef::cast)
341 .filter(|name_ref| match self.resolve_local_name(&name_ref) {
342 None => false,
343 Some(entry) => entry.ptr() == ptr,
344 })
345 .map(|name_ref| ReferenceDescriptor {
346 name: name_ref.text().to_string(),
347 range: name_ref.syntax().text_range(),
348 })
349 .collect()
350 }
351
352 /// Note: `FxHashSet<TraitId>` should be treated as an opaque type, passed into `Type
353 pub fn traits_in_scope(&self, db: &impl HirDatabase) -> FxHashSet<TraitId> {
354 self.resolver.traits_in_scope(db)
355 }
356
357 pub fn expand(
358 &self,
359 db: &impl HirDatabase,
360 macro_call: InFile<&ast::MacroCall>,
361 ) -> Option<Expansion> {
362 let def = self.resolve_macro_call(db, macro_call)?.id;
363 let ast_id = AstId::new(
364 macro_call.file_id,
365 db.ast_id_map(macro_call.file_id).ast_id(macro_call.value),
366 );
367 Some(Expansion { macro_call_id: def.as_call_id(db, MacroCallKind::FnLike(ast_id)) })
368 }
369}
370
371fn scope_for(
372 scopes: &ExprScopes,
373 source_map: &BodySourceMap,
374 node: InFile<&SyntaxNode>,
375) -> Option<ScopeId> {
376 node.value
377 .ancestors()
378 .filter_map(ast::Expr::cast)
379 .filter_map(|it| source_map.node_expr(InFile::new(node.file_id, &it)))
380 .find_map(|it| scopes.scope_for(it))
381}
382
383fn scope_for_offset(
384 scopes: &ExprScopes,
385 source_map: &BodySourceMap,
386 offset: InFile<TextUnit>,
387) -> Option<ScopeId> {
388 scopes
389 .scope_by_expr()
390 .iter()
391 .filter_map(|(id, scope)| {
392 let source = source_map.expr_syntax(*id)?;
393 // FIXME: correctly handle macro expansion
394 if source.file_id != offset.file_id {
395 return None;
396 }
397 let syntax_node_ptr =
398 source.value.either(|it| it.syntax_node_ptr(), |it| it.syntax_node_ptr());
399 Some((syntax_node_ptr, scope))
400 })
401 // find containing scope
402 .min_by_key(|(ptr, _scope)| {
403 (
404 !(ptr.range().start() <= offset.value && offset.value <= ptr.range().end()),
405 ptr.range().len(),
406 )
407 })
408 .map(|(ptr, scope)| {
409 adjust(scopes, source_map, ptr, offset.file_id, offset.value).unwrap_or(*scope)
410 })
411}
412
413// XXX: during completion, cursor might be outside of any particular
414// expression. Try to figure out the correct scope...
415fn adjust(
416 scopes: &ExprScopes,
417 source_map: &BodySourceMap,
418 ptr: SyntaxNodePtr,
419 file_id: HirFileId,
420 offset: TextUnit,
421) -> Option<ScopeId> {
422 let r = ptr.range();
423 let child_scopes = scopes
424 .scope_by_expr()
425 .iter()
426 .filter_map(|(id, scope)| {
427 let source = source_map.expr_syntax(*id)?;
428 // FIXME: correctly handle macro expansion
429 if source.file_id != file_id {
430 return None;
431 }
432 let syntax_node_ptr =
433 source.value.either(|it| it.syntax_node_ptr(), |it| it.syntax_node_ptr());
434 Some((syntax_node_ptr, scope))
435 })
436 .map(|(ptr, scope)| (ptr.range(), scope))
437 .filter(|(range, _)| range.start() <= offset && range.is_subrange(&r) && *range != r);
438
439 child_scopes
440 .max_by(|(r1, _), (r2, _)| {
441 if r2.is_subrange(&r1) {
442 std::cmp::Ordering::Greater
443 } else if r1.is_subrange(&r2) {
444 std::cmp::Ordering::Less
445 } else {
446 r1.start().cmp(&r2.start())
447 }
448 })
449 .map(|(_ptr, scope)| *scope)
450}
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 2024-12-12 05:35:37 +0000