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authorLukas Wirth <[email protected]>2020-12-11 12:49:32 +0000
committerLukas Wirth <[email protected]>2020-12-11 23:56:52 +0000
commit11f86641829273e2b2b7023c2028bb475fce58ee (patch)
tree8633b96c3f812412ea6c19acb1b6a770292d4697
parent41321d96789ed918eebda02ada76758765d19d16 (diff)
Add Lifetimes to the HIR
-rw-r--r--crates/assists/src/ast_transform.rs2
-rw-r--r--crates/hir/src/code_model.rs47
-rw-r--r--crates/hir/src/lib.rs9
-rw-r--r--crates/hir_def/src/generics.rs69
-rw-r--r--crates/hir_def/src/item_tree.rs2
-rw-r--r--crates/hir_def/src/item_tree/lower.rs20
-rw-r--r--crates/hir_def/src/lib.rs7
-rw-r--r--crates/hir_def/src/path.rs4
-rw-r--r--crates/hir_def/src/path/lower.rs12
-rw-r--r--crates/hir_def/src/type_ref.rs50
-rw-r--r--crates/hir_expand/src/name.rs7
-rw-r--r--crates/hir_ty/src/display.rs15
-rw-r--r--crates/hir_ty/src/infer/expr.rs1
-rw-r--r--crates/hir_ty/src/lib.rs10
-rw-r--r--crates/hir_ty/src/lower.rs66
-rw-r--r--crates/hir_ty/src/utils.rs24
16 files changed, 249 insertions, 96 deletions
diff --git a/crates/assists/src/ast_transform.rs b/crates/assists/src/ast_transform.rs
index 66e4634b1..da94e9987 100644
--- a/crates/assists/src/ast_transform.rs
+++ b/crates/assists/src/ast_transform.rs
@@ -89,7 +89,7 @@ impl<'a> SubstituteTypeParams<'a> {
89 let substs = get_syntactic_substs(impl_def).unwrap_or_default(); 89 let substs = get_syntactic_substs(impl_def).unwrap_or_default();
90 let generic_def: hir::GenericDef = trait_.into(); 90 let generic_def: hir::GenericDef = trait_.into();
91 let substs_by_param: FxHashMap<_, _> = generic_def 91 let substs_by_param: FxHashMap<_, _> = generic_def
92 .params(source_scope.db) 92 .type_params(source_scope.db)
93 .into_iter() 93 .into_iter()
94 // this is a trait impl, so we need to skip the first type parameter -- this is a bit hacky 94 // this is a trait impl, so we need to skip the first type parameter -- this is a bit hacky
95 .skip(1) 95 .skip(1)
diff --git a/crates/hir/src/code_model.rs b/crates/hir/src/code_model.rs
index 9a1e9ba49..fcc42c6bb 100644
--- a/crates/hir/src/code_model.rs
+++ b/crates/hir/src/code_model.rs
@@ -19,8 +19,9 @@ use hir_def::{
19 src::HasSource as _, 19 src::HasSource as _,
20 type_ref::{Mutability, TypeRef}, 20 type_ref::{Mutability, TypeRef},
21 AdtId, AssocContainerId, AssocItemId, AssocItemLoc, AttrDefId, ConstId, DefWithBodyId, EnumId, 21 AdtId, AssocContainerId, AssocItemId, AssocItemLoc, AttrDefId, ConstId, DefWithBodyId, EnumId,
22 FunctionId, GenericDefId, HasModule, ImplId, LocalEnumVariantId, LocalFieldId, LocalModuleId, 22 FunctionId, GenericDefId, HasModule, ImplId, LifetimeParamId, LocalEnumVariantId, LocalFieldId,
23 Lookup, ModuleId, StaticId, StructId, TraitId, TypeAliasId, TypeParamId, UnionId, 23 LocalModuleId, Lookup, ModuleId, StaticId, StructId, TraitId, TypeAliasId, TypeParamId,
24 UnionId,
24}; 25};
25use hir_def::{find_path::PrefixKind, item_scope::ItemInNs, visibility::Visibility}; 26use hir_def::{find_path::PrefixKind, item_scope::ItemInNs, visibility::Visibility};
26use hir_expand::{ 27use hir_expand::{
@@ -831,7 +832,7 @@ impl SelfParam {
831 .params 832 .params
832 .first() 833 .first()
833 .map(|param| match *param { 834 .map(|param| match *param {
834 TypeRef::Reference(_, mutability) => mutability.into(), 835 TypeRef::Reference(.., mutability) => mutability.into(),
835 _ => Access::Owned, 836 _ => Access::Owned,
836 }) 837 })
837 .unwrap_or(Access::Owned) 838 .unwrap_or(Access::Owned)
@@ -1098,8 +1099,25 @@ impl_from!(
1098); 1099);
1099 1100
1100impl GenericDef { 1101impl GenericDef {
1101 pub fn params(self, db: &dyn HirDatabase) -> Vec<TypeParam> { 1102 pub fn params(self, db: &dyn HirDatabase) -> Vec<GenericParam> {
1102 let generics: Arc<hir_def::generics::GenericParams> = db.generic_params(self.into()); 1103 let generics = db.generic_params(self.into());
1104 let ty_params = generics
1105 .types
1106 .iter()
1107 .map(|(local_id, _)| TypeParam { id: TypeParamId { parent: self.into(), local_id } })
1108 .map(GenericParam::TypeParam);
1109 let lt_params = generics
1110 .lifetimes
1111 .iter()
1112 .map(|(local_id, _)| LifetimeParam {
1113 id: LifetimeParamId { parent: self.into(), local_id },
1114 })
1115 .map(GenericParam::LifetimeParam);
1116 ty_params.chain(lt_params).collect()
1117 }
1118
1119 pub fn type_params(self, db: &dyn HirDatabase) -> Vec<TypeParam> {
1120 let generics = db.generic_params(self.into());
1103 generics 1121 generics
1104 .types 1122 .types
1105 .iter() 1123 .iter()
@@ -1176,6 +1194,13 @@ impl Local {
1176} 1194}
1177 1195
1178#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] 1196#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
1197pub enum GenericParam {
1198 TypeParam(TypeParam),
1199 LifetimeParam(LifetimeParam),
1200}
1201impl_from!(TypeParam, LifetimeParam for GenericParam);
1202
1203#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
1179pub struct TypeParam { 1204pub struct TypeParam {
1180 pub(crate) id: TypeParamId, 1205 pub(crate) id: TypeParamId,
1181} 1206}
@@ -1215,6 +1240,18 @@ impl TypeParam {
1215 } 1240 }
1216} 1241}
1217 1242
1243#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
1244pub struct LifetimeParam {
1245 pub(crate) id: LifetimeParamId,
1246}
1247
1248impl LifetimeParam {
1249 pub fn name(self, db: &dyn HirDatabase) -> Name {
1250 let params = db.generic_params(self.id.parent);
1251 params.lifetimes[self.id.local_id].name.clone()
1252 }
1253}
1254
1218// FIXME: rename from `ImplDef` to `Impl` 1255// FIXME: rename from `ImplDef` to `Impl`
1219#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] 1256#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
1220pub struct ImplDef { 1257pub struct ImplDef {
diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index 302a52491..0f399a2c6 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -35,8 +35,8 @@ pub use crate::{
35 code_model::{ 35 code_model::{
36 Access, Adt, AsAssocItem, AssocItem, AssocItemContainer, Callable, CallableKind, Const, 36 Access, Adt, AsAssocItem, AssocItem, AssocItemContainer, Callable, CallableKind, Const,
37 Crate, CrateDependency, DefWithBody, Enum, EnumVariant, Field, FieldSource, Function, 37 Crate, CrateDependency, DefWithBody, Enum, EnumVariant, Field, FieldSource, Function,
38 GenericDef, HasVisibility, ImplDef, Local, MacroDef, Module, ModuleDef, ScopeDef, Static, 38 GenericDef, HasVisibility, ImplDef, LifetimeParam, Local, MacroDef, Module, ModuleDef,
39 Struct, Trait, Type, TypeAlias, TypeParam, Union, VariantDef, 39 ScopeDef, Static, Struct, Trait, Type, TypeAlias, TypeParam, Union, VariantDef,
40 }, 40 },
41 has_source::HasSource, 41 has_source::HasSource,
42 semantics::{PathResolution, Semantics, SemanticsScope}, 42 semantics::{PathResolution, Semantics, SemanticsScope},
@@ -56,8 +56,9 @@ pub use hir_def::{
56 visibility::Visibility, 56 visibility::Visibility,
57}; 57};
58pub use hir_expand::{ 58pub use hir_expand::{
59 name::known, name::AsName, name::Name, ExpandResult, HirFileId, InFile, MacroCallId, 59 name::{known, AsName, Name},
60 MacroCallLoc, /* FIXME */ MacroDefId, MacroFile, Origin, 60 ExpandResult, HirFileId, InFile, MacroCallId, MacroCallLoc, /* FIXME */ MacroDefId,
61 MacroFile, Origin,
61}; 62};
62pub use hir_ty::display::HirDisplay; 63pub use hir_ty::display::HirDisplay;
63 64
diff --git a/crates/hir_def/src/generics.rs b/crates/hir_def/src/generics.rs
index 835fe3fbd..5189c7e9f 100644
--- a/crates/hir_def/src/generics.rs
+++ b/crates/hir_def/src/generics.rs
@@ -21,7 +21,7 @@ use crate::{
21 keys, 21 keys,
22 src::HasChildSource, 22 src::HasChildSource,
23 src::HasSource, 23 src::HasSource,
24 type_ref::{TypeBound, TypeRef}, 24 type_ref::{LifetimeRef, TypeBound, TypeRef},
25 AdtId, GenericDefId, LocalTypeParamId, Lookup, TypeParamId, 25 AdtId, GenericDefId, LocalTypeParamId, Lookup, TypeParamId,
26}; 26};
27 27
@@ -33,6 +33,12 @@ pub struct TypeParamData {
33 pub provenance: TypeParamProvenance, 33 pub provenance: TypeParamProvenance,
34} 34}
35 35
36/// Data about a generic parameter (to a function, struct, impl, ...).
37#[derive(Clone, PartialEq, Eq, Debug)]
38pub struct LifetimeParamData {
39 pub name: Name,
40}
41
36#[derive(Copy, Clone, PartialEq, Eq, Debug)] 42#[derive(Copy, Clone, PartialEq, Eq, Debug)]
37pub enum TypeParamProvenance { 43pub enum TypeParamProvenance {
38 TypeParamList, 44 TypeParamList,
@@ -44,7 +50,7 @@ pub enum TypeParamProvenance {
44#[derive(Clone, PartialEq, Eq, Debug, Default)] 50#[derive(Clone, PartialEq, Eq, Debug, Default)]
45pub struct GenericParams { 51pub struct GenericParams {
46 pub types: Arena<TypeParamData>, 52 pub types: Arena<TypeParamData>,
47 // lifetimes: Arena<LocalLifetimeParamId, LifetimeParamData>, 53 pub lifetimes: Arena<LifetimeParamData>,
48 pub where_predicates: Vec<WherePredicate>, 54 pub where_predicates: Vec<WherePredicate>,
49} 55}
50 56
@@ -53,16 +59,17 @@ pub struct GenericParams {
53/// It might still result in multiple actual predicates though, because of 59/// It might still result in multiple actual predicates though, because of
54/// associated type bindings like `Iterator<Item = u32>`. 60/// associated type bindings like `Iterator<Item = u32>`.
55#[derive(Clone, PartialEq, Eq, Debug)] 61#[derive(Clone, PartialEq, Eq, Debug)]
56pub struct WherePredicate { 62pub enum WherePredicate {
57 pub target: WherePredicateTarget, 63 TypeBound { target: WherePredicateTypeTarget, bound: TypeBound },
58 pub bound: TypeBound, 64 Lifetime { target: LifetimeRef, bound: LifetimeRef },
59} 65}
60 66
61#[derive(Clone, PartialEq, Eq, Debug)] 67#[derive(Clone, PartialEq, Eq, Debug)]
62pub enum WherePredicateTarget { 68pub enum WherePredicateTypeTarget {
63 TypeRef(TypeRef), 69 TypeRef(TypeRef),
64 /// For desugared where predicates that can directly refer to a type param. 70 /// For desugared where predicates that can directly refer to a type param.
65 TypeParam(LocalTypeParamId), 71 TypeParam(LocalTypeParamId),
72 // FIXME: ForLifetime(Vec<LifetimeParamId>, TypeRef)
66} 73}
67 74
68type SourceMap = ArenaMap<LocalTypeParamId, Either<ast::Trait, ast::TypeParam>>; 75type SourceMap = ArenaMap<LocalTypeParamId, Either<ast::Trait, ast::TypeParam>>;
@@ -123,7 +130,7 @@ impl GenericParams {
123 } 130 }
124 131
125 fn new(db: &dyn DefDatabase, def: GenericDefId) -> (GenericParams, InFile<SourceMap>) { 132 fn new(db: &dyn DefDatabase, def: GenericDefId) -> (GenericParams, InFile<SourceMap>) {
126 let mut generics = GenericParams { types: Arena::default(), where_predicates: Vec::new() }; 133 let mut generics = GenericParams::default();
127 let mut sm = ArenaMap::default(); 134 let mut sm = ArenaMap::default();
128 135
129 // FIXME: add `: Sized` bound for everything except for `Self` in traits 136 // FIXME: add `: Sized` bound for everything except for `Self` in traits
@@ -171,7 +178,7 @@ impl GenericParams {
171 // add super traits as bounds on Self 178 // add super traits as bounds on Self
172 // i.e., trait Foo: Bar is equivalent to trait Foo where Self: Bar 179 // i.e., trait Foo: Bar is equivalent to trait Foo where Self: Bar
173 let self_param = TypeRef::Path(name![Self].into()); 180 let self_param = TypeRef::Path(name![Self].into());
174 generics.fill_bounds(&lower_ctx, &src.value, self_param); 181 generics.fill_bounds(&lower_ctx, &src.value, Either::Left(self_param));
175 182
176 generics.fill(&lower_ctx, &mut sm, &src.value); 183 generics.fill(&lower_ctx, &mut sm, &src.value);
177 src.file_id 184 src.file_id
@@ -218,12 +225,12 @@ impl GenericParams {
218 &mut self, 225 &mut self,
219 lower_ctx: &LowerCtx, 226 lower_ctx: &LowerCtx,
220 node: &dyn ast::TypeBoundsOwner, 227 node: &dyn ast::TypeBoundsOwner,
221 type_ref: TypeRef, 228 target: Either<TypeRef, LifetimeRef>,
222 ) { 229 ) {
223 for bound in 230 for bound in
224 node.type_bound_list().iter().flat_map(|type_bound_list| type_bound_list.bounds()) 231 node.type_bound_list().iter().flat_map(|type_bound_list| type_bound_list.bounds())
225 { 232 {
226 self.add_where_predicate_from_bound(lower_ctx, bound, type_ref.clone()); 233 self.add_where_predicate_from_bound(lower_ctx, bound, target.clone());
227 } 234 }
228 } 235 }
229 236
@@ -246,19 +253,30 @@ impl GenericParams {
246 sm.insert(param_id, Either::Right(type_param.clone())); 253 sm.insert(param_id, Either::Right(type_param.clone()));
247 254
248 let type_ref = TypeRef::Path(name.into()); 255 let type_ref = TypeRef::Path(name.into());
249 self.fill_bounds(&lower_ctx, &type_param, type_ref); 256 self.fill_bounds(&lower_ctx, &type_param, Either::Left(type_ref));
257 }
258 for lifetime_param in params.lifetime_params() {
259 let name = lifetime_param
260 .lifetime_token()
261 .map_or_else(Name::missing, |tok| Name::new_lifetime(&tok));
262 let param = LifetimeParamData { name: name.clone() };
263 let _param_id = self.lifetimes.alloc(param);
264 let lifetime_ref = LifetimeRef::new_name(name);
265 self.fill_bounds(&lower_ctx, &lifetime_param, Either::Right(lifetime_ref));
250 } 266 }
251 } 267 }
252 268
253 fn fill_where_predicates(&mut self, lower_ctx: &LowerCtx, where_clause: ast::WhereClause) { 269 fn fill_where_predicates(&mut self, lower_ctx: &LowerCtx, where_clause: ast::WhereClause) {
254 for pred in where_clause.predicates() { 270 for pred in where_clause.predicates() {
255 let type_ref = match pred.ty() { 271 let target = if let Some(type_ref) = pred.ty() {
256 Some(type_ref) => type_ref, 272 Either::Left(TypeRef::from_ast(lower_ctx, type_ref))
257 None => continue, 273 } else if let Some(lifetime_tok) = pred.lifetime_token() {
274 Either::Right(LifetimeRef::from_token(lifetime_tok))
275 } else {
276 continue;
258 }; 277 };
259 let type_ref = TypeRef::from_ast(lower_ctx, type_ref);
260 for bound in pred.type_bound_list().iter().flat_map(|l| l.bounds()) { 278 for bound in pred.type_bound_list().iter().flat_map(|l| l.bounds()) {
261 self.add_where_predicate_from_bound(lower_ctx, bound, type_ref.clone()); 279 self.add_where_predicate_from_bound(lower_ctx, bound, target.clone());
262 } 280 }
263 } 281 }
264 } 282 }
@@ -267,15 +285,24 @@ impl GenericParams {
267 &mut self, 285 &mut self,
268 lower_ctx: &LowerCtx, 286 lower_ctx: &LowerCtx,
269 bound: ast::TypeBound, 287 bound: ast::TypeBound,
270 type_ref: TypeRef, 288 target: Either<TypeRef, LifetimeRef>,
271 ) { 289 ) {
272 if bound.question_mark_token().is_some() { 290 if bound.question_mark_token().is_some() {
273 // FIXME: remove this bound 291 // FIXME: remove this bound
274 return; 292 return;
275 } 293 }
276 let bound = TypeBound::from_ast(lower_ctx, bound); 294 let bound = TypeBound::from_ast(lower_ctx, bound);
277 self.where_predicates 295 let predicate = match (target, bound) {
278 .push(WherePredicate { target: WherePredicateTarget::TypeRef(type_ref), bound }); 296 (Either::Left(type_ref), bound) => WherePredicate::TypeBound {
297 target: WherePredicateTypeTarget::TypeRef(type_ref),
298 bound,
299 },
300 (Either::Right(lifetime), TypeBound::Lifetime(bound)) => {
301 WherePredicate::Lifetime { target: lifetime, bound }
302 }
303 _ => return,
304 };
305 self.where_predicates.push(predicate);
279 } 306 }
280 307
281 pub(crate) fn fill_implicit_impl_trait_args(&mut self, type_ref: &TypeRef) { 308 pub(crate) fn fill_implicit_impl_trait_args(&mut self, type_ref: &TypeRef) {
@@ -288,8 +315,8 @@ impl GenericParams {
288 }; 315 };
289 let param_id = self.types.alloc(param); 316 let param_id = self.types.alloc(param);
290 for bound in bounds { 317 for bound in bounds {
291 self.where_predicates.push(WherePredicate { 318 self.where_predicates.push(WherePredicate::TypeBound {
292 target: WherePredicateTarget::TypeParam(param_id), 319 target: WherePredicateTypeTarget::TypeParam(param_id),
293 bound: bound.clone(), 320 bound: bound.clone(),
294 }); 321 });
295 } 322 }
diff --git a/crates/hir_def/src/item_tree.rs b/crates/hir_def/src/item_tree.rs
index c017b352d..c6ada271e 100644
--- a/crates/hir_def/src/item_tree.rs
+++ b/crates/hir_def/src/item_tree.rs
@@ -255,7 +255,7 @@ impl GenericParamsStorage {
255} 255}
256 256
257static EMPTY_GENERICS: GenericParams = 257static EMPTY_GENERICS: GenericParams =
258 GenericParams { types: Arena::new(), where_predicates: Vec::new() }; 258 GenericParams { types: Arena::new(), lifetimes: Arena::new(), where_predicates: Vec::new() };
259 259
260#[derive(Default, Debug, Eq, PartialEq)] 260#[derive(Default, Debug, Eq, PartialEq)]
261struct ItemTreeData { 261struct ItemTreeData {
diff --git a/crates/hir_def/src/item_tree/lower.rs b/crates/hir_def/src/item_tree/lower.rs
index 63b2826f8..f7ce2e26d 100644
--- a/crates/hir_def/src/item_tree/lower.rs
+++ b/crates/hir_def/src/item_tree/lower.rs
@@ -13,6 +13,7 @@ use syntax::{
13use crate::{ 13use crate::{
14 attr::Attrs, 14 attr::Attrs,
15 generics::{GenericParams, TypeParamData, TypeParamProvenance}, 15 generics::{GenericParams, TypeParamData, TypeParamProvenance},
16 type_ref::LifetimeRef,
16}; 17};
17 18
18use super::*; 19use super::*;
@@ -292,12 +293,16 @@ impl Ctx {
292 let self_type = TypeRef::Path(name![Self].into()); 293 let self_type = TypeRef::Path(name![Self].into());
293 match self_param.kind() { 294 match self_param.kind() {
294 ast::SelfParamKind::Owned => self_type, 295 ast::SelfParamKind::Owned => self_type,
295 ast::SelfParamKind::Ref => { 296 ast::SelfParamKind::Ref => TypeRef::Reference(
296 TypeRef::Reference(Box::new(self_type), Mutability::Shared) 297 Box::new(self_type),
297 } 298 self_param.lifetime_token().map(LifetimeRef::from_token),
298 ast::SelfParamKind::MutRef => { 299 Mutability::Shared,
299 TypeRef::Reference(Box::new(self_type), Mutability::Mut) 300 ),
300 } 301 ast::SelfParamKind::MutRef => TypeRef::Reference(
302 Box::new(self_type),
303 self_param.lifetime_token().map(LifetimeRef::from_token),
304 Mutability::Mut,
305 ),
301 } 306 }
302 } 307 }
303 }; 308 };
@@ -629,8 +634,7 @@ impl Ctx {
629 // add super traits as bounds on Self 634 // add super traits as bounds on Self
630 // i.e., trait Foo: Bar is equivalent to trait Foo where Self: Bar 635 // i.e., trait Foo: Bar is equivalent to trait Foo where Self: Bar
631 let self_param = TypeRef::Path(name![Self].into()); 636 let self_param = TypeRef::Path(name![Self].into());
632 generics.fill_bounds(&self.body_ctx, trait_def, self_param); 637 generics.fill_bounds(&self.body_ctx, trait_def, Either::Left(self_param));
633
634 generics.fill(&self.body_ctx, &mut sm, node); 638 generics.fill(&self.body_ctx, &mut sm, node);
635 } 639 }
636 GenericsOwner::Impl => { 640 GenericsOwner::Impl => {
diff --git a/crates/hir_def/src/lib.rs b/crates/hir_def/src/lib.rs
index 02ed30e4d..a1bbc729f 100644
--- a/crates/hir_def/src/lib.rs
+++ b/crates/hir_def/src/lib.rs
@@ -224,6 +224,13 @@ pub struct TypeParamId {
224pub type LocalTypeParamId = Idx<generics::TypeParamData>; 224pub type LocalTypeParamId = Idx<generics::TypeParamData>;
225 225
226#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] 226#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
227pub struct LifetimeParamId {
228 pub parent: GenericDefId,
229 pub local_id: LocalLifetimeParamId,
230}
231pub type LocalLifetimeParamId = Idx<generics::LifetimeParamData>;
232
233#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
227pub enum ContainerId { 234pub enum ContainerId {
228 ModuleId(ModuleId), 235 ModuleId(ModuleId),
229 DefWithBodyId(DefWithBodyId), 236 DefWithBodyId(DefWithBodyId),
diff --git a/crates/hir_def/src/path.rs b/crates/hir_def/src/path.rs
index 5b8c1e449..00a69a8a6 100644
--- a/crates/hir_def/src/path.rs
+++ b/crates/hir_def/src/path.rs
@@ -7,7 +7,7 @@ use std::{
7 sync::Arc, 7 sync::Arc,
8}; 8};
9 9
10use crate::body::LowerCtx; 10use crate::{body::LowerCtx, type_ref::LifetimeRef};
11use base_db::CrateId; 11use base_db::CrateId;
12use hir_expand::{ 12use hir_expand::{
13 hygiene::Hygiene, 13 hygiene::Hygiene,
@@ -145,7 +145,7 @@ pub struct AssociatedTypeBinding {
145#[derive(Debug, Clone, PartialEq, Eq, Hash)] 145#[derive(Debug, Clone, PartialEq, Eq, Hash)]
146pub enum GenericArg { 146pub enum GenericArg {
147 Type(TypeRef), 147 Type(TypeRef),
148 // or lifetime... 148 Lifetime(LifetimeRef),
149} 149}
150 150
151impl Path { 151impl Path {
diff --git a/crates/hir_def/src/path/lower.rs b/crates/hir_def/src/path/lower.rs
index 07b9723ce..60fa7646b 100644
--- a/crates/hir_def/src/path/lower.rs
+++ b/crates/hir_def/src/path/lower.rs
@@ -15,7 +15,7 @@ use super::AssociatedTypeBinding;
15use crate::{ 15use crate::{
16 body::LowerCtx, 16 body::LowerCtx,
17 path::{GenericArg, GenericArgs, ModPath, Path, PathKind}, 17 path::{GenericArg, GenericArgs, ModPath, Path, PathKind},
18 type_ref::{TypeBound, TypeRef}, 18 type_ref::{LifetimeRef, TypeBound, TypeRef},
19}; 19};
20 20
21pub(super) use lower_use::lower_use_tree; 21pub(super) use lower_use::lower_use_tree;
@@ -170,8 +170,14 @@ pub(super) fn lower_generic_args(
170 bindings.push(AssociatedTypeBinding { name, type_ref, bounds }); 170 bindings.push(AssociatedTypeBinding { name, type_ref, bounds });
171 } 171 }
172 } 172 }
173 // Lifetimes and constants are ignored for now. 173 ast::GenericArg::LifetimeArg(lifetime_arg) => {
174 ast::GenericArg::LifetimeArg(_) | ast::GenericArg::ConstArg(_) => (), 174 if let Some(lifetime) = lifetime_arg.lifetime_token() {
175 let lifetime_ref = LifetimeRef::from_token(lifetime);
176 args.push(GenericArg::Lifetime(lifetime_ref))
177 }
178 }
179 // constants are ignored for now.
180 ast::GenericArg::ConstArg(_) => (),
175 } 181 }
176 } 182 }
177 183
diff --git a/crates/hir_def/src/type_ref.rs b/crates/hir_def/src/type_ref.rs
index 1a78c1444..347ceabb9 100644
--- a/crates/hir_def/src/type_ref.rs
+++ b/crates/hir_def/src/type_ref.rs
@@ -1,6 +1,7 @@
1//! HIR for references to types. Paths in these are not yet resolved. They can 1//! HIR for references to types. Paths in these are not yet resolved. They can
2//! be directly created from an ast::TypeRef, without further queries. 2//! be directly created from an ast::TypeRef, without further queries.
3use syntax::ast::{self}; 3use hir_expand::name::Name;
4use syntax::{ast, SyntaxToken};
4 5
5use crate::{body::LowerCtx, path::Path}; 6use crate::{body::LowerCtx, path::Path};
6 7
@@ -58,7 +59,7 @@ pub enum TypeRef {
58 Tuple(Vec<TypeRef>), 59 Tuple(Vec<TypeRef>),
59 Path(Path), 60 Path(Path),
60 RawPtr(Box<TypeRef>, Mutability), 61 RawPtr(Box<TypeRef>, Mutability),
61 Reference(Box<TypeRef>, Mutability), 62 Reference(Box<TypeRef>, Option<LifetimeRef>, Mutability),
62 Array(Box<TypeRef> /*, Expr*/), 63 Array(Box<TypeRef> /*, Expr*/),
63 Slice(Box<TypeRef>), 64 Slice(Box<TypeRef>),
64 /// A fn pointer. Last element of the vector is the return type. 65 /// A fn pointer. Last element of the vector is the return type.
@@ -70,10 +71,29 @@ pub enum TypeRef {
70} 71}
71 72
72#[derive(Clone, PartialEq, Eq, Hash, Debug)] 73#[derive(Clone, PartialEq, Eq, Hash, Debug)]
74pub struct LifetimeRef {
75 pub name: Name,
76}
77
78impl LifetimeRef {
79 pub(crate) fn new_name(name: Name) -> Self {
80 LifetimeRef { name }
81 }
82
83 pub(crate) fn from_token(token: SyntaxToken) -> Self {
84 LifetimeRef { name: Name::new_lifetime(&token) }
85 }
86
87 pub fn missing() -> LifetimeRef {
88 LifetimeRef { name: Name::missing() }
89 }
90}
91
92#[derive(Clone, PartialEq, Eq, Hash, Debug)]
73pub enum TypeBound { 93pub enum TypeBound {
74 Path(Path), 94 Path(Path),
75 // also for<> bounds 95 // ForLifetime(Vec<LifetimeRef>, Path), FIXME ForLifetime
76 // also Lifetimes 96 Lifetime(LifetimeRef),
77 Error, 97 Error,
78} 98}
79 99
@@ -107,8 +127,9 @@ impl TypeRef {
107 } 127 }
108 ast::Type::RefType(inner) => { 128 ast::Type::RefType(inner) => {
109 let inner_ty = TypeRef::from_ast_opt(&ctx, inner.ty()); 129 let inner_ty = TypeRef::from_ast_opt(&ctx, inner.ty());
130 let lifetime = inner.lifetime_token().map(|t| LifetimeRef::from_token(t));
110 let mutability = Mutability::from_mutable(inner.mut_token().is_some()); 131 let mutability = Mutability::from_mutable(inner.mut_token().is_some());
111 TypeRef::Reference(Box::new(inner_ty), mutability) 132 TypeRef::Reference(Box::new(inner_ty), lifetime, mutability)
112 } 133 }
113 ast::Type::InferType(_inner) => TypeRef::Placeholder, 134 ast::Type::InferType(_inner) => TypeRef::Placeholder,
114 ast::Type::FnPtrType(inner) => { 135 ast::Type::FnPtrType(inner) => {
@@ -163,14 +184,14 @@ impl TypeRef {
163 types.iter().for_each(|t| go(t, f)) 184 types.iter().for_each(|t| go(t, f))
164 } 185 }
165 TypeRef::RawPtr(type_ref, _) 186 TypeRef::RawPtr(type_ref, _)
166 | TypeRef::Reference(type_ref, _) 187 | TypeRef::Reference(type_ref, ..)
167 | TypeRef::Array(type_ref) 188 | TypeRef::Array(type_ref)
168 | TypeRef::Slice(type_ref) => go(&type_ref, f), 189 | TypeRef::Slice(type_ref) => go(&type_ref, f),
169 TypeRef::ImplTrait(bounds) | TypeRef::DynTrait(bounds) => { 190 TypeRef::ImplTrait(bounds) | TypeRef::DynTrait(bounds) => {
170 for bound in bounds { 191 for bound in bounds {
171 match bound { 192 match bound {
172 TypeBound::Path(path) => go_path(path, f), 193 TypeBound::Path(path) => go_path(path, f),
173 TypeBound::Error => (), 194 TypeBound::Lifetime(_) | TypeBound::Error => (),
174 } 195 }
175 } 196 }
176 } 197 }
@@ -186,8 +207,12 @@ impl TypeRef {
186 for segment in path.segments().iter() { 207 for segment in path.segments().iter() {
187 if let Some(args_and_bindings) = segment.args_and_bindings { 208 if let Some(args_and_bindings) = segment.args_and_bindings {
188 for arg in &args_and_bindings.args { 209 for arg in &args_and_bindings.args {
189 let crate::path::GenericArg::Type(type_ref) = arg; 210 match arg {
190 go(type_ref, f); 211 crate::path::GenericArg::Type(type_ref) => {
212 go(type_ref, f);
213 }
214 crate::path::GenericArg::Lifetime(_) => {}
215 }
191 } 216 }
192 for binding in &args_and_bindings.bindings { 217 for binding in &args_and_bindings.bindings {
193 if let Some(type_ref) = &binding.type_ref { 218 if let Some(type_ref) = &binding.type_ref {
@@ -196,7 +221,7 @@ impl TypeRef {
196 for bound in &binding.bounds { 221 for bound in &binding.bounds {
197 match bound { 222 match bound {
198 TypeBound::Path(path) => go_path(path, f), 223 TypeBound::Path(path) => go_path(path, f),
199 TypeBound::Error => (), 224 TypeBound::Lifetime(_) | TypeBound::Error => (),
200 } 225 }
201 } 226 }
202 } 227 }
@@ -232,7 +257,10 @@ impl TypeBound {
232 }; 257 };
233 TypeBound::Path(path) 258 TypeBound::Path(path)
234 } 259 }
235 ast::TypeBoundKind::ForType(_) | ast::TypeBoundKind::Lifetime(_) => TypeBound::Error, 260 ast::TypeBoundKind::ForType(_) => TypeBound::Error, // FIXME ForType
261 ast::TypeBoundKind::Lifetime(lifetime) => {
262 TypeBound::Lifetime(LifetimeRef::from_token(lifetime))
263 }
236 } 264 }
237 } 265 }
238 266
diff --git a/crates/hir_expand/src/name.rs b/crates/hir_expand/src/name.rs
index b26ffa1ef..583ed6142 100644
--- a/crates/hir_expand/src/name.rs
+++ b/crates/hir_expand/src/name.rs
@@ -38,7 +38,7 @@ impl Name {
38 } 38 }
39 39
40 pub fn new_lifetime(lt: &syntax::SyntaxToken) -> Name { 40 pub fn new_lifetime(lt: &syntax::SyntaxToken) -> Name {
41 assert!(lt.kind() == syntax::SyntaxKind::LIFETIME); 41 assert_eq!(lt.kind(), syntax::SyntaxKind::LIFETIME);
42 Name(Repr::Text(lt.text().clone())) 42 Name(Repr::Text(lt.text().clone()))
43 } 43 }
44 44
@@ -250,6 +250,8 @@ pub mod known {
250 pub const SELF_PARAM: super::Name = super::Name::new_inline("self"); 250 pub const SELF_PARAM: super::Name = super::Name::new_inline("self");
251 pub const SELF_TYPE: super::Name = super::Name::new_inline("Self"); 251 pub const SELF_TYPE: super::Name = super::Name::new_inline("Self");
252 252
253 pub const STATIC_LIFETIME: super::Name = super::Name::new_inline("'static");
254
253 #[macro_export] 255 #[macro_export]
254 macro_rules! name { 256 macro_rules! name {
255 (self) => { 257 (self) => {
@@ -258,6 +260,9 @@ pub mod known {
258 (Self) => { 260 (Self) => {
259 $crate::name::known::SELF_TYPE 261 $crate::name::known::SELF_TYPE
260 }; 262 };
263 ('static) => {
264 $crate::name::known::STATIC_LIFETIME
265 };
261 ($ident:ident) => { 266 ($ident:ident) => {
262 $crate::name::known::$ident 267 $crate::name::known::$ident
263 }; 268 };
diff --git a/crates/hir_ty/src/display.rs b/crates/hir_ty/src/display.rs
index e77481906..0d968cc68 100644
--- a/crates/hir_ty/src/display.rs
+++ b/crates/hir_ty/src/display.rs
@@ -4,7 +4,7 @@ use std::fmt;
4 4
5use crate::{ 5use crate::{
6 db::HirDatabase, utils::generics, ApplicationTy, CallableDefId, FnSig, GenericPredicate, 6 db::HirDatabase, utils::generics, ApplicationTy, CallableDefId, FnSig, GenericPredicate,
7 Obligation, OpaqueTyId, ProjectionTy, Substs, TraitRef, Ty, TypeCtor, 7 Lifetime, Obligation, OpaqueTyId, ProjectionTy, Substs, TraitRef, Ty, TypeCtor,
8}; 8};
9use hir_def::{ 9use hir_def::{
10 find_path, generics::TypeParamProvenance, item_scope::ItemInNs, AdtId, AssocContainerId, 10 find_path, generics::TypeParamProvenance, item_scope::ItemInNs, AdtId, AssocContainerId,
@@ -710,6 +710,19 @@ impl HirDisplay for GenericPredicate {
710 } 710 }
711} 711}
712 712
713impl HirDisplay for Lifetime {
714 fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
715 match self {
716 Lifetime::Parameter(id) => {
717 let generics = generics(f.db.upcast(), id.parent);
718 let param_data = &generics.params.lifetimes[id.local_id];
719 write!(f, "{}", &param_data.name)
720 }
721 Lifetime::Static => write!(f, "'static"),
722 }
723 }
724}
725
713impl HirDisplay for Obligation { 726impl HirDisplay for Obligation {
714 fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> { 727 fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
715 match self { 728 match self {
diff --git a/crates/hir_ty/src/infer/expr.rs b/crates/hir_ty/src/infer/expr.rs
index 605951b10..a89fff773 100644
--- a/crates/hir_ty/src/infer/expr.rs
+++ b/crates/hir_ty/src/infer/expr.rs
@@ -848,6 +848,7 @@ impl<'a> InferenceContext<'a> {
848 let ty = self.make_ty(type_ref); 848 let ty = self.make_ty(type_ref);
849 substs.push(ty); 849 substs.push(ty);
850 } 850 }
851 GenericArg::Lifetime(_) => {}
851 } 852 }
852 } 853 }
853 }; 854 };
diff --git a/crates/hir_ty/src/lib.rs b/crates/hir_ty/src/lib.rs
index 5a8c97198..357bd92f9 100644
--- a/crates/hir_ty/src/lib.rs
+++ b/crates/hir_ty/src/lib.rs
@@ -29,8 +29,8 @@ use base_db::{salsa, CrateId};
29use hir_def::{ 29use hir_def::{
30 expr::ExprId, 30 expr::ExprId,
31 type_ref::{Mutability, Rawness}, 31 type_ref::{Mutability, Rawness},
32 AdtId, AssocContainerId, DefWithBodyId, GenericDefId, HasModule, Lookup, TraitId, TypeAliasId, 32 AdtId, AssocContainerId, DefWithBodyId, GenericDefId, HasModule, LifetimeParamId, Lookup,
33 TypeParamId, 33 TraitId, TypeAliasId, TypeParamId,
34}; 34};
35use itertools::Itertools; 35use itertools::Itertools;
36 36
@@ -52,6 +52,12 @@ pub use traits::{InEnvironment, Obligation, ProjectionPredicate, TraitEnvironmen
52 52
53pub use chalk_ir::{BoundVar, DebruijnIndex}; 53pub use chalk_ir::{BoundVar, DebruijnIndex};
54 54
55#[derive(Clone, PartialEq, Eq, Debug, Hash)]
56pub enum Lifetime {
57 Parameter(LifetimeParamId),
58 Static,
59}
60
55/// A type constructor or type name: this might be something like the primitive 61/// A type constructor or type name: this might be something like the primitive
56/// type `bool`, a struct like `Vec`, or things like function pointers or 62/// type `bool`, a struct like `Vec`, or things like function pointers or
57/// tuples. 63/// tuples.
diff --git a/crates/hir_ty/src/lower.rs b/crates/hir_ty/src/lower.rs
index 708e2af0f..92f779360 100644
--- a/crates/hir_ty/src/lower.rs
+++ b/crates/hir_ty/src/lower.rs
@@ -12,7 +12,7 @@ use base_db::CrateId;
12use hir_def::{ 12use hir_def::{
13 adt::StructKind, 13 adt::StructKind,
14 builtin_type::BuiltinType, 14 builtin_type::BuiltinType,
15 generics::{TypeParamProvenance, WherePredicate, WherePredicateTarget}, 15 generics::{TypeParamProvenance, WherePredicate, WherePredicateTypeTarget},
16 path::{GenericArg, Path, PathSegment, PathSegments}, 16 path::{GenericArg, Path, PathSegment, PathSegments},
17 resolver::{HasResolver, Resolver, TypeNs}, 17 resolver::{HasResolver, Resolver, TypeNs},
18 type_ref::{TypeBound, TypeRef}, 18 type_ref::{TypeBound, TypeRef},
@@ -171,7 +171,7 @@ impl Ty {
171 let inner_ty = Ty::from_hir(ctx, inner); 171 let inner_ty = Ty::from_hir(ctx, inner);
172 Ty::apply_one(TypeCtor::Slice, inner_ty) 172 Ty::apply_one(TypeCtor::Slice, inner_ty)
173 } 173 }
174 TypeRef::Reference(inner, mutability) => { 174 TypeRef::Reference(inner, _, mutability) => {
175 let inner_ty = Ty::from_hir(ctx, inner); 175 let inner_ty = Ty::from_hir(ctx, inner);
176 Ty::apply_one(TypeCtor::Ref(*mutability), inner_ty) 176 Ty::apply_one(TypeCtor::Ref(*mutability), inner_ty)
177 } 177 }
@@ -555,7 +555,7 @@ fn substs_from_path_segment(
555 555
556 substs.extend(iter::repeat(Ty::Unknown).take(parent_params)); 556 substs.extend(iter::repeat(Ty::Unknown).take(parent_params));
557 557
558 let mut had_explicit_args = false; 558 let mut had_explicit_type_args = false;
559 559
560 if let Some(generic_args) = &segment.args_and_bindings { 560 if let Some(generic_args) = &segment.args_and_bindings {
561 if !generic_args.has_self_type { 561 if !generic_args.has_self_type {
@@ -568,10 +568,11 @@ fn substs_from_path_segment(
568 for arg in generic_args.args.iter().skip(skip).take(expected_num) { 568 for arg in generic_args.args.iter().skip(skip).take(expected_num) {
569 match arg { 569 match arg {
570 GenericArg::Type(type_ref) => { 570 GenericArg::Type(type_ref) => {
571 had_explicit_args = true; 571 had_explicit_type_args = true;
572 let ty = Ty::from_hir(ctx, type_ref); 572 let ty = Ty::from_hir(ctx, type_ref);
573 substs.push(ty); 573 substs.push(ty);
574 } 574 }
575 GenericArg::Lifetime(_) => {}
575 } 576 }
576 } 577 }
577 } 578 }
@@ -579,7 +580,7 @@ fn substs_from_path_segment(
579 // handle defaults. In expression or pattern path segments without 580 // handle defaults. In expression or pattern path segments without
580 // explicitly specified type arguments, missing type arguments are inferred 581 // explicitly specified type arguments, missing type arguments are inferred
581 // (i.e. defaults aren't used). 582 // (i.e. defaults aren't used).
582 if !infer_args || had_explicit_args { 583 if !infer_args || had_explicit_type_args {
583 if let Some(def_generic) = def_generic { 584 if let Some(def_generic) = def_generic {
584 let defaults = ctx.db.generic_defaults(def_generic); 585 let defaults = ctx.db.generic_defaults(def_generic);
585 assert_eq!(total_len, defaults.len()); 586 assert_eq!(total_len, defaults.len());
@@ -657,7 +658,7 @@ impl TraitRef {
657 ) -> Option<TraitRef> { 658 ) -> Option<TraitRef> {
658 match bound { 659 match bound {
659 TypeBound::Path(path) => TraitRef::from_path(ctx, path, Some(self_ty)), 660 TypeBound::Path(path) => TraitRef::from_path(ctx, path, Some(self_ty)),
660 TypeBound::Error => None, 661 TypeBound::Lifetime(_) | TypeBound::Error => None,
661 } 662 }
662 } 663 }
663} 664}
@@ -667,22 +668,30 @@ impl GenericPredicate {
667 ctx: &'a TyLoweringContext<'a>, 668 ctx: &'a TyLoweringContext<'a>,
668 where_predicate: &'a WherePredicate, 669 where_predicate: &'a WherePredicate,
669 ) -> impl Iterator<Item = GenericPredicate> + 'a { 670 ) -> impl Iterator<Item = GenericPredicate> + 'a {
670 let self_ty = match &where_predicate.target { 671 match where_predicate {
671 WherePredicateTarget::TypeRef(type_ref) => Ty::from_hir(ctx, type_ref), 672 WherePredicate::TypeBound { target, bound } => {
672 WherePredicateTarget::TypeParam(param_id) => { 673 let self_ty = match target {
673 let generic_def = ctx.resolver.generic_def().expect("generics in scope"); 674 WherePredicateTypeTarget::TypeRef(type_ref) => Ty::from_hir(ctx, type_ref),
674 let generics = generics(ctx.db.upcast(), generic_def); 675 WherePredicateTypeTarget::TypeParam(param_id) => {
675 let param_id = hir_def::TypeParamId { parent: generic_def, local_id: *param_id }; 676 let generic_def = ctx.resolver.generic_def().expect("generics in scope");
676 match ctx.type_param_mode { 677 let generics = generics(ctx.db.upcast(), generic_def);
677 TypeParamLoweringMode::Placeholder => Ty::Placeholder(param_id), 678 let param_id =
678 TypeParamLoweringMode::Variable => { 679 hir_def::TypeParamId { parent: generic_def, local_id: *param_id };
679 let idx = generics.param_idx(param_id).expect("matching generics"); 680 match ctx.type_param_mode {
680 Ty::Bound(BoundVar::new(DebruijnIndex::INNERMOST, idx)) 681 TypeParamLoweringMode::Placeholder => Ty::Placeholder(param_id),
682 TypeParamLoweringMode::Variable => {
683 let idx = generics.param_idx(param_id).expect("matching generics");
684 Ty::Bound(BoundVar::new(DebruijnIndex::INNERMOST, idx))
685 }
686 }
681 } 687 }
682 } 688 };
689 GenericPredicate::from_type_bound(ctx, bound, self_ty)
690 .collect::<Vec<_>>()
691 .into_iter()
683 } 692 }
684 }; 693 WherePredicate::Lifetime { .. } => vec![].into_iter(),
685 GenericPredicate::from_type_bound(ctx, &where_predicate.bound, self_ty) 694 }
686 } 695 }
687 696
688 pub(crate) fn from_type_bound<'a>( 697 pub(crate) fn from_type_bound<'a>(
@@ -707,7 +716,7 @@ fn assoc_type_bindings_from_type_bound<'a>(
707) -> impl Iterator<Item = GenericPredicate> + 'a { 716) -> impl Iterator<Item = GenericPredicate> + 'a {
708 let last_segment = match bound { 717 let last_segment = match bound {
709 TypeBound::Path(path) => path.segments().last(), 718 TypeBound::Path(path) => path.segments().last(),
710 TypeBound::Error => None, 719 TypeBound::Error | TypeBound::Lifetime(_) => None,
711 }; 720 };
712 last_segment 721 last_segment
713 .into_iter() 722 .into_iter()
@@ -872,11 +881,16 @@ pub(crate) fn generic_predicates_for_param_query(
872 resolver 881 resolver
873 .where_predicates_in_scope() 882 .where_predicates_in_scope()
874 // we have to filter out all other predicates *first*, before attempting to lower them 883 // we have to filter out all other predicates *first*, before attempting to lower them
875 .filter(|pred| match &pred.target { 884 .filter(|pred| match pred {
876 WherePredicateTarget::TypeRef(type_ref) => { 885 WherePredicate::TypeBound {
877 Ty::from_hir_only_param(&ctx, type_ref) == Some(param_id) 886 target: WherePredicateTypeTarget::TypeRef(type_ref),
878 } 887 ..
879 WherePredicateTarget::TypeParam(local_id) => *local_id == param_id.local_id, 888 } => Ty::from_hir_only_param(&ctx, type_ref) == Some(param_id),
889 WherePredicate::TypeBound {
890 target: WherePredicateTypeTarget::TypeParam(local_id),
891 ..
892 } => *local_id == param_id.local_id,
893 WherePredicate::Lifetime { .. } => false,
880 }) 894 })
881 .flat_map(|pred| { 895 .flat_map(|pred| {
882 GenericPredicate::from_where_predicate(&ctx, pred) 896 GenericPredicate::from_where_predicate(&ctx, pred)
diff --git a/crates/hir_ty/src/utils.rs b/crates/hir_ty/src/utils.rs
index e3e244268..af880c065 100644
--- a/crates/hir_ty/src/utils.rs
+++ b/crates/hir_ty/src/utils.rs
@@ -2,11 +2,10 @@
2//! query, but can't be computed directly from `*Data` (ie, which need a `db`). 2//! query, but can't be computed directly from `*Data` (ie, which need a `db`).
3use std::sync::Arc; 3use std::sync::Arc;
4 4
5use hir_def::generics::WherePredicateTarget;
6use hir_def::{ 5use hir_def::{
7 adt::VariantData, 6 adt::VariantData,
8 db::DefDatabase, 7 db::DefDatabase,
9 generics::{GenericParams, TypeParamData, TypeParamProvenance}, 8 generics::{GenericParams, TypeParamData, TypeParamProvenance, WherePredicateTypeTarget},
10 path::Path, 9 path::Path,
11 resolver::{HasResolver, TypeNs}, 10 resolver::{HasResolver, TypeNs},
12 type_ref::TypeRef, 11 type_ref::TypeRef,
@@ -27,14 +26,19 @@ fn direct_super_traits(db: &dyn DefDatabase, trait_: TraitId) -> Vec<TraitId> {
27 generic_params 26 generic_params
28 .where_predicates 27 .where_predicates
29 .iter() 28 .iter()
30 .filter_map(|pred| match &pred.target { 29 .filter_map(|pred| match pred {
31 WherePredicateTarget::TypeRef(TypeRef::Path(p)) if p == &Path::from(name![Self]) => { 30 hir_def::generics::WherePredicate::TypeBound { target, bound } => match target {
32 pred.bound.as_path() 31 WherePredicateTypeTarget::TypeRef(TypeRef::Path(p))
33 } 32 if p == &Path::from(name![Self]) =>
34 WherePredicateTarget::TypeParam(local_id) if Some(*local_id) == trait_self => { 33 {
35 pred.bound.as_path() 34 bound.as_path()
36 } 35 }
37 _ => None, 36 WherePredicateTypeTarget::TypeParam(local_id) if Some(*local_id) == trait_self => {
37 bound.as_path()
38 }
39 _ => None,
40 },
41 hir_def::generics::WherePredicate::Lifetime { .. } => None,
38 }) 42 })
39 .filter_map(|path| match resolver.resolve_path_in_type_ns_fully(db, path.mod_path()) { 43 .filter_map(|path| match resolver.resolve_path_in_type_ns_fully(db, path.mod_path()) {
40 Some(TypeNs::TraitId(t)) => Some(t), 44 Some(TypeNs::TraitId(t)) => Some(t),