aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorFlorian Diebold <[email protected]>2020-01-24 13:32:47 +0000
committerFlorian Diebold <[email protected]>2020-02-07 17:28:10 +0000
commit22a65b11b3a69b3dae561b34c6b28cb2107169d1 (patch)
treedd4a2174d664267fbfe93f0d737975670d3030d0
parent5397f05bfe7f3b18229a65040c6685e762b2f9a3 (diff)
Introduce TyLoweringContext
-rw-r--r--crates/ra_hir/src/code_model.rs11
-rw-r--r--crates/ra_hir/src/source_analyzer.rs9
-rw-r--r--crates/ra_hir_ty/src/infer.rs17
-rw-r--r--crates/ra_hir_ty/src/infer/path.rs25
-rw-r--r--crates/ra_hir_ty/src/lib.rs2
-rw-r--r--crates/ra_hir_ty/src/lower.rs232
6 files changed, 144 insertions, 152 deletions
diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index eaacf8c9e..837a3ed6d 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -733,7 +733,8 @@ impl Local {
733 let ty = infer[self.pat_id].clone(); 733 let ty = infer[self.pat_id].clone();
734 let resolver = def.resolver(db); 734 let resolver = def.resolver(db);
735 let krate = def.module(db).krate; 735 let krate = def.module(db).krate;
736 let environment = TraitEnvironment::lower(db, &resolver); 736 let ctx = hir_ty::TyLoweringContext { db, resolver: &resolver };
737 let environment = TraitEnvironment::lower(&ctx);
737 Type { krate, ty: InEnvironment { value: ty, environment } } 738 Type { krate, ty: InEnvironment { value: ty, environment } }
738 } 739 }
739 740
@@ -789,8 +790,9 @@ impl ImplBlock {
789 pub fn target_ty(&self, db: &impl HirDatabase) -> Type { 790 pub fn target_ty(&self, db: &impl HirDatabase) -> Type {
790 let impl_data = db.impl_data(self.id); 791 let impl_data = db.impl_data(self.id);
791 let resolver = self.id.resolver(db); 792 let resolver = self.id.resolver(db);
792 let environment = TraitEnvironment::lower(db, &resolver); 793 let ctx = hir_ty::TyLoweringContext { db, resolver: &resolver };
793 let ty = Ty::from_hir(db, &resolver, &impl_data.target_type); 794 let environment = TraitEnvironment::lower(&ctx);
795 let ty = Ty::from_hir(&ctx, &impl_data.target_type);
794 Type { 796 Type {
795 krate: self.id.lookup(db).container.module(db).krate, 797 krate: self.id.lookup(db).container.module(db).krate,
796 ty: InEnvironment { value: ty, environment }, 798 ty: InEnvironment { value: ty, environment },
@@ -844,7 +846,8 @@ pub struct Type {
844impl Type { 846impl Type {
845 fn new(db: &impl HirDatabase, krate: CrateId, lexical_env: impl HasResolver, ty: Ty) -> Type { 847 fn new(db: &impl HirDatabase, krate: CrateId, lexical_env: impl HasResolver, ty: Ty) -> Type {
846 let resolver = lexical_env.resolver(db); 848 let resolver = lexical_env.resolver(db);
847 let environment = TraitEnvironment::lower(db, &resolver); 849 let ctx = hir_ty::TyLoweringContext { db, resolver: &resolver };
850 let environment = TraitEnvironment::lower(&ctx);
848 Type { krate, ty: InEnvironment { value: ty, environment } } 851 Type { krate, ty: InEnvironment { value: ty, environment } }
849 } 852 }
850 853
diff --git a/crates/ra_hir/src/source_analyzer.rs b/crates/ra_hir/src/source_analyzer.rs
index 4f8fc9602..9cfd52856 100644
--- a/crates/ra_hir/src/source_analyzer.rs
+++ b/crates/ra_hir/src/source_analyzer.rs
@@ -178,6 +178,11 @@ impl SourceAnalyzer {
178 } 178 }
179 } 179 }
180 180
181 fn trait_env(&self, db: &impl HirDatabase) -> Arc<TraitEnvironment> {
182 let ctx = hir_ty::TyLoweringContext { db, resolver: &self.resolver };
183 TraitEnvironment::lower(&ctx)
184 }
185
181 pub fn type_of(&self, db: &impl HirDatabase, expr: &ast::Expr) -> Option<Type> { 186 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)) { 187 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())? 188 self.body_source_map.as_ref()?.node_expr(expr.as_ref())?
@@ -186,14 +191,14 @@ impl SourceAnalyzer {
186 }; 191 };
187 192
188 let ty = self.infer.as_ref()?[expr_id].clone(); 193 let ty = self.infer.as_ref()?[expr_id].clone();
189 let environment = TraitEnvironment::lower(db, &self.resolver); 194 let environment = self.trait_env(db);
190 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } }) 195 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
191 } 196 }
192 197
193 pub fn type_of_pat(&self, db: &impl HirDatabase, pat: &ast::Pat) -> Option<Type> { 198 pub fn type_of_pat(&self, db: &impl HirDatabase, pat: &ast::Pat) -> Option<Type> {
194 let pat_id = self.pat_id(pat)?; 199 let pat_id = self.pat_id(pat)?;
195 let ty = self.infer.as_ref()?[pat_id].clone(); 200 let ty = self.infer.as_ref()?[pat_id].clone();
196 let environment = TraitEnvironment::lower(db, &self.resolver); 201 let environment = self.trait_env(db);
197 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } }) 202 Some(Type { krate: self.resolver.krate()?, ty: InEnvironment { value: ty, environment } })
198 } 203 }
199 204
diff --git a/crates/ra_hir_ty/src/infer.rs b/crates/ra_hir_ty/src/infer.rs
index e2eda3134..e27ce6e91 100644
--- a/crates/ra_hir_ty/src/infer.rs
+++ b/crates/ra_hir_ty/src/infer.rs
@@ -215,12 +215,13 @@ struct InferenceContext<'a, D: HirDatabase> {
215 215
216impl<'a, D: HirDatabase> InferenceContext<'a, D> { 216impl<'a, D: HirDatabase> InferenceContext<'a, D> {
217 fn new(db: &'a D, owner: DefWithBodyId, resolver: Resolver) -> Self { 217 fn new(db: &'a D, owner: DefWithBodyId, resolver: Resolver) -> Self {
218 let ctx = crate::lower::TyLoweringContext { db, resolver: &resolver };
218 InferenceContext { 219 InferenceContext {
219 result: InferenceResult::default(), 220 result: InferenceResult::default(),
220 table: unify::InferenceTable::new(), 221 table: unify::InferenceTable::new(),
221 obligations: Vec::default(), 222 obligations: Vec::default(),
222 return_ty: Ty::Unknown, // set in collect_fn_signature 223 return_ty: Ty::Unknown, // set in collect_fn_signature
223 trait_env: TraitEnvironment::lower(db, &resolver), 224 trait_env: TraitEnvironment::lower(&ctx),
224 coerce_unsized_map: Self::init_coerce_unsized_map(db, &resolver), 225 coerce_unsized_map: Self::init_coerce_unsized_map(db, &resolver),
225 db, 226 db,
226 owner, 227 owner,
@@ -272,12 +273,9 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
272 } 273 }
273 274
274 fn make_ty(&mut self, type_ref: &TypeRef) -> Ty { 275 fn make_ty(&mut self, type_ref: &TypeRef) -> Ty {
275 let ty = Ty::from_hir( 276 // FIXME use right resolver for block
276 self.db, 277 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &self.resolver };
277 // FIXME use right resolver for block 278 let ty = Ty::from_hir(&ctx, type_ref);
278 &self.resolver,
279 type_ref,
280 );
281 let ty = self.insert_type_vars(ty); 279 let ty = self.insert_type_vars(ty);
282 self.normalize_associated_types_in(ty) 280 self.normalize_associated_types_in(ty)
283 } 281 }
@@ -446,17 +444,18 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
446 None => return (Ty::Unknown, None), 444 None => return (Ty::Unknown, None),
447 }; 445 };
448 let resolver = &self.resolver; 446 let resolver = &self.resolver;
447 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &self.resolver };
449 // FIXME: this should resolve assoc items as well, see this example: 448 // FIXME: this should resolve assoc items as well, see this example:
450 // https://play.rust-lang.org/?gist=087992e9e22495446c01c0d4e2d69521 449 // https://play.rust-lang.org/?gist=087992e9e22495446c01c0d4e2d69521
451 match resolver.resolve_path_in_type_ns_fully(self.db, path.mod_path()) { 450 match resolver.resolve_path_in_type_ns_fully(self.db, path.mod_path()) {
452 Some(TypeNs::AdtId(AdtId::StructId(strukt))) => { 451 Some(TypeNs::AdtId(AdtId::StructId(strukt))) => {
453 let substs = Ty::substs_from_path(self.db, resolver, path, strukt.into()); 452 let substs = Ty::substs_from_path(&ctx, path, strukt.into());
454 let ty = self.db.ty(strukt.into()); 453 let ty = self.db.ty(strukt.into());
455 let ty = self.insert_type_vars(ty.apply_substs(substs)); 454 let ty = self.insert_type_vars(ty.apply_substs(substs));
456 (ty, Some(strukt.into())) 455 (ty, Some(strukt.into()))
457 } 456 }
458 Some(TypeNs::EnumVariantId(var)) => { 457 Some(TypeNs::EnumVariantId(var)) => {
459 let substs = Ty::substs_from_path(self.db, resolver, path, var.into()); 458 let substs = Ty::substs_from_path(&ctx, path, var.into());
460 let ty = self.db.ty(var.parent.into()); 459 let ty = self.db.ty(var.parent.into());
461 let ty = self.insert_type_vars(ty.apply_substs(substs)); 460 let ty = self.insert_type_vars(ty.apply_substs(substs));
462 (ty, Some(var.into())) 461 (ty, Some(var.into()))
diff --git a/crates/ra_hir_ty/src/infer/path.rs b/crates/ra_hir_ty/src/infer/path.rs
index 2c1d4831d..132f3d6f2 100644
--- a/crates/ra_hir_ty/src/infer/path.rs
+++ b/crates/ra_hir_ty/src/infer/path.rs
@@ -11,7 +11,7 @@ use hir_expand::name::Name;
11 11
12use crate::{db::HirDatabase, method_resolution, Substs, Ty, TypeWalk, ValueTyDefId}; 12use crate::{db::HirDatabase, method_resolution, Substs, Ty, TypeWalk, ValueTyDefId};
13 13
14use super::{ExprOrPatId, InferenceContext, TraitEnvironment, TraitRef}; 14use super::{ExprOrPatId, InferenceContext, TraitRef};
15 15
16impl<'a, D: HirDatabase> InferenceContext<'a, D> { 16impl<'a, D: HirDatabase> InferenceContext<'a, D> {
17 pub(super) fn infer_path( 17 pub(super) fn infer_path(
@@ -39,7 +39,8 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
39 } 39 }
40 let ty = self.make_ty(type_ref); 40 let ty = self.make_ty(type_ref);
41 let remaining_segments_for_ty = path.segments().take(path.segments().len() - 1); 41 let remaining_segments_for_ty = path.segments().take(path.segments().len() - 1);
42 let ty = Ty::from_type_relative_path(self.db, resolver, ty, remaining_segments_for_ty); 42 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &resolver };
43 let ty = Ty::from_type_relative_path(&ctx, ty, remaining_segments_for_ty);
43 self.resolve_ty_assoc_item( 44 self.resolve_ty_assoc_item(
44 ty, 45 ty,
45 &path.segments().last().expect("path had at least one segment").name, 46 &path.segments().last().expect("path had at least one segment").name,
@@ -73,7 +74,8 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
73 if let Some(self_subst) = self_subst { 74 if let Some(self_subst) = self_subst {
74 ty = ty.subst(&self_subst); 75 ty = ty.subst(&self_subst);
75 } 76 }
76 let substs = Ty::substs_from_path(self.db, &self.resolver, path, typable); 77 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &self.resolver };
78 let substs = Ty::substs_from_path(&ctx, path, typable);
77 let ty = ty.subst(&substs); 79 let ty = ty.subst(&substs);
78 Some(ty) 80 Some(ty)
79 } 81 }
@@ -98,13 +100,9 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
98 (TypeNs::TraitId(trait_), true) => { 100 (TypeNs::TraitId(trait_), true) => {
99 let segment = 101 let segment =
100 remaining_segments.last().expect("there should be at least one segment here"); 102 remaining_segments.last().expect("there should be at least one segment here");
101 let trait_ref = TraitRef::from_resolved_path( 103 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &self.resolver };
102 self.db, 104 let trait_ref =
103 &self.resolver, 105 TraitRef::from_resolved_path(&ctx, trait_.into(), resolved_segment, None);
104 trait_.into(),
105 resolved_segment,
106 None,
107 );
108 self.resolve_trait_assoc_item(trait_ref, segment, id) 106 self.resolve_trait_assoc_item(trait_ref, segment, id)
109 } 107 }
110 (def, _) => { 108 (def, _) => {
@@ -114,9 +112,9 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
114 // as Iterator>::Item::default`) 112 // as Iterator>::Item::default`)
115 let remaining_segments_for_ty = 113 let remaining_segments_for_ty =
116 remaining_segments.take(remaining_segments.len() - 1); 114 remaining_segments.take(remaining_segments.len() - 1);
115 let ctx = crate::lower::TyLoweringContext { db: self.db, resolver: &self.resolver };
117 let ty = Ty::from_partly_resolved_hir_path( 116 let ty = Ty::from_partly_resolved_hir_path(
118 self.db, 117 &ctx,
119 &self.resolver,
120 def, 118 def,
121 resolved_segment, 119 resolved_segment,
122 remaining_segments_for_ty, 120 remaining_segments_for_ty,
@@ -193,14 +191,13 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
193 } 191 }
194 192
195 let canonical_ty = self.canonicalizer().canonicalize_ty(ty.clone()); 193 let canonical_ty = self.canonicalizer().canonicalize_ty(ty.clone());
196 let env = TraitEnvironment::lower(self.db, &self.resolver);
197 let krate = self.resolver.krate()?; 194 let krate = self.resolver.krate()?;
198 let traits_in_scope = self.resolver.traits_in_scope(self.db); 195 let traits_in_scope = self.resolver.traits_in_scope(self.db);
199 196
200 method_resolution::iterate_method_candidates( 197 method_resolution::iterate_method_candidates(
201 &canonical_ty.value, 198 &canonical_ty.value,
202 self.db, 199 self.db,
203 env, 200 self.trait_env.clone(),
204 krate, 201 krate,
205 &traits_in_scope, 202 &traits_in_scope,
206 Some(name), 203 Some(name),
diff --git a/crates/ra_hir_ty/src/lib.rs b/crates/ra_hir_ty/src/lib.rs
index 08d501ccd..6f0e8b481 100644
--- a/crates/ra_hir_ty/src/lib.rs
+++ b/crates/ra_hir_ty/src/lib.rs
@@ -60,7 +60,7 @@ use display::{HirDisplay, HirFormatter};
60pub use autoderef::autoderef; 60pub use autoderef::autoderef;
61pub use infer::{do_infer_query, InferTy, InferenceResult}; 61pub use infer::{do_infer_query, InferTy, InferenceResult};
62pub use lower::CallableDef; 62pub use lower::CallableDef;
63pub use lower::{callable_item_sig, TyDefId, ValueTyDefId}; 63pub use lower::{callable_item_sig, TyDefId, TyLoweringContext, ValueTyDefId};
64pub use traits::{InEnvironment, Obligation, ProjectionPredicate, TraitEnvironment}; 64pub use traits::{InEnvironment, Obligation, ProjectionPredicate, TraitEnvironment};
65 65
66/// A type constructor or type name: this might be something like the primitive 66/// A type constructor or type name: this might be something like the primitive
diff --git a/crates/ra_hir_ty/src/lower.rs b/crates/ra_hir_ty/src/lower.rs
index 2c2ecee9c..87c984e3f 100644
--- a/crates/ra_hir_ty/src/lower.rs
+++ b/crates/ra_hir_ty/src/lower.rs
@@ -31,47 +31,50 @@ use crate::{
31 Ty, TypeCtor, TypeWalk, 31 Ty, TypeCtor, TypeWalk,
32}; 32};
33 33
34#[derive(Clone, Debug)]
35pub struct TyLoweringContext<'a, DB: HirDatabase> {
36 pub db: &'a DB,
37 pub resolver: &'a Resolver,
38}
39
34impl Ty { 40impl Ty {
35 pub fn from_hir(db: &impl HirDatabase, resolver: &Resolver, type_ref: &TypeRef) -> Self { 41 pub fn from_hir(ctx: &TyLoweringContext<'_, impl HirDatabase>, type_ref: &TypeRef) -> Self {
36 match type_ref { 42 match type_ref {
37 TypeRef::Never => Ty::simple(TypeCtor::Never), 43 TypeRef::Never => Ty::simple(TypeCtor::Never),
38 TypeRef::Tuple(inner) => { 44 TypeRef::Tuple(inner) => {
39 let inner_tys: Arc<[Ty]> = 45 let inner_tys: Arc<[Ty]> = inner.iter().map(|tr| Ty::from_hir(ctx, tr)).collect();
40 inner.iter().map(|tr| Ty::from_hir(db, resolver, tr)).collect();
41 Ty::apply( 46 Ty::apply(
42 TypeCtor::Tuple { cardinality: inner_tys.len() as u16 }, 47 TypeCtor::Tuple { cardinality: inner_tys.len() as u16 },
43 Substs(inner_tys), 48 Substs(inner_tys),
44 ) 49 )
45 } 50 }
46 TypeRef::Path(path) => Ty::from_hir_path(db, resolver, path), 51 TypeRef::Path(path) => Ty::from_hir_path(ctx, path),
47 TypeRef::RawPtr(inner, mutability) => { 52 TypeRef::RawPtr(inner, mutability) => {
48 let inner_ty = Ty::from_hir(db, resolver, inner); 53 let inner_ty = Ty::from_hir(ctx, inner);
49 Ty::apply_one(TypeCtor::RawPtr(*mutability), inner_ty) 54 Ty::apply_one(TypeCtor::RawPtr(*mutability), inner_ty)
50 } 55 }
51 TypeRef::Array(inner) => { 56 TypeRef::Array(inner) => {
52 let inner_ty = Ty::from_hir(db, resolver, inner); 57 let inner_ty = Ty::from_hir(ctx, inner);
53 Ty::apply_one(TypeCtor::Array, inner_ty) 58 Ty::apply_one(TypeCtor::Array, inner_ty)
54 } 59 }
55 TypeRef::Slice(inner) => { 60 TypeRef::Slice(inner) => {
56 let inner_ty = Ty::from_hir(db, resolver, inner); 61 let inner_ty = Ty::from_hir(ctx, inner);
57 Ty::apply_one(TypeCtor::Slice, inner_ty) 62 Ty::apply_one(TypeCtor::Slice, inner_ty)
58 } 63 }
59 TypeRef::Reference(inner, mutability) => { 64 TypeRef::Reference(inner, mutability) => {
60 let inner_ty = Ty::from_hir(db, resolver, inner); 65 let inner_ty = Ty::from_hir(ctx, inner);
61 Ty::apply_one(TypeCtor::Ref(*mutability), inner_ty) 66 Ty::apply_one(TypeCtor::Ref(*mutability), inner_ty)
62 } 67 }
63 TypeRef::Placeholder => Ty::Unknown, 68 TypeRef::Placeholder => Ty::Unknown,
64 TypeRef::Fn(params) => { 69 TypeRef::Fn(params) => {
65 let sig = Substs(params.iter().map(|tr| Ty::from_hir(db, resolver, tr)).collect()); 70 let sig = Substs(params.iter().map(|tr| Ty::from_hir(ctx, tr)).collect());
66 Ty::apply(TypeCtor::FnPtr { num_args: sig.len() as u16 - 1 }, sig) 71 Ty::apply(TypeCtor::FnPtr { num_args: sig.len() as u16 - 1 }, sig)
67 } 72 }
68 TypeRef::DynTrait(bounds) => { 73 TypeRef::DynTrait(bounds) => {
69 let self_ty = Ty::Bound(0); 74 let self_ty = Ty::Bound(0);
70 let predicates = bounds 75 let predicates = bounds
71 .iter() 76 .iter()
72 .flat_map(|b| { 77 .flat_map(|b| GenericPredicate::from_type_bound(ctx, b, self_ty.clone()))
73 GenericPredicate::from_type_bound(db, resolver, b, self_ty.clone())
74 })
75 .collect(); 78 .collect();
76 Ty::Dyn(predicates) 79 Ty::Dyn(predicates)
77 } 80 }
@@ -79,9 +82,7 @@ impl Ty {
79 let self_ty = Ty::Bound(0); 82 let self_ty = Ty::Bound(0);
80 let predicates = bounds 83 let predicates = bounds
81 .iter() 84 .iter()
82 .flat_map(|b| { 85 .flat_map(|b| GenericPredicate::from_type_bound(ctx, b, self_ty.clone()))
83 GenericPredicate::from_type_bound(db, resolver, b, self_ty.clone())
84 })
85 .collect(); 86 .collect();
86 Ty::Opaque(predicates) 87 Ty::Opaque(predicates)
87 } 88 }
@@ -93,8 +94,7 @@ impl Ty {
93 /// lower the self types of the predicates since that could lead to cycles. 94 /// lower the self types of the predicates since that could lead to cycles.
94 /// So we just check here if the `type_ref` resolves to a generic param, and which. 95 /// So we just check here if the `type_ref` resolves to a generic param, and which.
95 fn from_hir_only_param( 96 fn from_hir_only_param(
96 db: &impl HirDatabase, 97 ctx: &TyLoweringContext<'_, impl HirDatabase>,
97 resolver: &Resolver,
98 type_ref: &TypeRef, 98 type_ref: &TypeRef,
99 ) -> Option<u32> { 99 ) -> Option<u32> {
100 let path = match type_ref { 100 let path = match type_ref {
@@ -107,12 +107,12 @@ impl Ty {
107 if path.segments().len() > 1 { 107 if path.segments().len() > 1 {
108 return None; 108 return None;
109 } 109 }
110 let resolution = match resolver.resolve_path_in_type_ns(db, path.mod_path()) { 110 let resolution = match ctx.resolver.resolve_path_in_type_ns(ctx.db, path.mod_path()) {
111 Some((it, None)) => it, 111 Some((it, None)) => it,
112 _ => return None, 112 _ => return None,
113 }; 113 };
114 if let TypeNs::GenericParam(param_id) = resolution { 114 if let TypeNs::GenericParam(param_id) = resolution {
115 let generics = generics(db, resolver.generic_def().expect("generics in scope")); 115 let generics = generics(ctx.db, ctx.resolver.generic_def().expect("generics in scope"));
116 let idx = generics.param_idx(param_id); 116 let idx = generics.param_idx(param_id);
117 Some(idx) 117 Some(idx)
118 } else { 118 } else {
@@ -121,15 +121,14 @@ impl Ty {
121 } 121 }
122 122
123 pub(crate) fn from_type_relative_path( 123 pub(crate) fn from_type_relative_path(
124 db: &impl HirDatabase, 124 ctx: &TyLoweringContext<'_, impl HirDatabase>,
125 resolver: &Resolver,
126 ty: Ty, 125 ty: Ty,
127 remaining_segments: PathSegments<'_>, 126 remaining_segments: PathSegments<'_>,
128 ) -> Ty { 127 ) -> Ty {
129 if remaining_segments.len() == 1 { 128 if remaining_segments.len() == 1 {
130 // resolve unselected assoc types 129 // resolve unselected assoc types
131 let segment = remaining_segments.first().unwrap(); 130 let segment = remaining_segments.first().unwrap();
132 Ty::select_associated_type(db, resolver, ty, segment) 131 Ty::select_associated_type(ctx, ty, segment)
133 } else if remaining_segments.len() > 1 { 132 } else if remaining_segments.len() > 1 {
134 // FIXME report error (ambiguous associated type) 133 // FIXME report error (ambiguous associated type)
135 Ty::Unknown 134 Ty::Unknown
@@ -139,20 +138,18 @@ impl Ty {
139 } 138 }
140 139
141 pub(crate) fn from_partly_resolved_hir_path( 140 pub(crate) fn from_partly_resolved_hir_path(
142 db: &impl HirDatabase, 141 ctx: &TyLoweringContext<'_, impl HirDatabase>,
143 resolver: &Resolver,
144 resolution: TypeNs, 142 resolution: TypeNs,
145 resolved_segment: PathSegment<'_>, 143 resolved_segment: PathSegment<'_>,
146 remaining_segments: PathSegments<'_>, 144 remaining_segments: PathSegments<'_>,
147 ) -> Ty { 145 ) -> Ty {
148 let ty = match resolution { 146 let ty = match resolution {
149 TypeNs::TraitId(trait_) => { 147 TypeNs::TraitId(trait_) => {
150 let trait_ref = 148 let trait_ref = TraitRef::from_resolved_path(ctx, trait_, resolved_segment, None);
151 TraitRef::from_resolved_path(db, resolver, trait_, resolved_segment, None);
152 return if remaining_segments.len() == 1 { 149 return if remaining_segments.len() == 1 {
153 let segment = remaining_segments.first().unwrap(); 150 let segment = remaining_segments.first().unwrap();
154 let associated_ty = associated_type_by_name_including_super_traits( 151 let associated_ty = associated_type_by_name_including_super_traits(
155 db, 152 ctx.db,
156 trait_ref.trait_, 153 trait_ref.trait_,
157 &segment.name, 154 &segment.name,
158 ); 155 );
@@ -177,37 +174,34 @@ impl Ty {
177 }; 174 };
178 } 175 }
179 TypeNs::GenericParam(param_id) => { 176 TypeNs::GenericParam(param_id) => {
180 let generics = generics(db, resolver.generic_def().expect("generics in scope")); 177 let generics =
178 generics(ctx.db, ctx.resolver.generic_def().expect("generics in scope"));
181 let idx = generics.param_idx(param_id); 179 let idx = generics.param_idx(param_id);
182 // FIXME: maybe return name in resolution? 180 // FIXME: maybe return name in resolution?
183 let name = generics.param_name(param_id); 181 let name = generics.param_name(param_id);
184 Ty::Param { idx, name } 182 Ty::Param { idx, name }
185 } 183 }
186 TypeNs::SelfType(impl_id) => db.impl_self_ty(impl_id).clone(), 184 TypeNs::SelfType(impl_id) => ctx.db.impl_self_ty(impl_id).clone(),
187 TypeNs::AdtSelfType(adt) => db.ty(adt.into()), 185 TypeNs::AdtSelfType(adt) => ctx.db.ty(adt.into()),
188 186
189 TypeNs::AdtId(it) => Ty::from_hir_path_inner(db, resolver, resolved_segment, it.into()), 187 TypeNs::AdtId(it) => Ty::from_hir_path_inner(ctx, resolved_segment, it.into()),
190 TypeNs::BuiltinType(it) => { 188 TypeNs::BuiltinType(it) => Ty::from_hir_path_inner(ctx, resolved_segment, it.into()),
191 Ty::from_hir_path_inner(db, resolver, resolved_segment, it.into()) 189 TypeNs::TypeAliasId(it) => Ty::from_hir_path_inner(ctx, resolved_segment, it.into()),
192 }
193 TypeNs::TypeAliasId(it) => {
194 Ty::from_hir_path_inner(db, resolver, resolved_segment, it.into())
195 }
196 // FIXME: report error 190 // FIXME: report error
197 TypeNs::EnumVariantId(_) => return Ty::Unknown, 191 TypeNs::EnumVariantId(_) => return Ty::Unknown,
198 }; 192 };
199 193
200 Ty::from_type_relative_path(db, resolver, ty, remaining_segments) 194 Ty::from_type_relative_path(ctx, ty, remaining_segments)
201 } 195 }
202 196
203 pub(crate) fn from_hir_path(db: &impl HirDatabase, resolver: &Resolver, path: &Path) -> Ty { 197 pub(crate) fn from_hir_path(ctx: &TyLoweringContext<'_, impl HirDatabase>, path: &Path) -> Ty {
204 // Resolve the path (in type namespace) 198 // Resolve the path (in type namespace)
205 if let Some(type_ref) = path.type_anchor() { 199 if let Some(type_ref) = path.type_anchor() {
206 let ty = Ty::from_hir(db, resolver, &type_ref); 200 let ty = Ty::from_hir(ctx, &type_ref);
207 return Ty::from_type_relative_path(db, resolver, ty, path.segments()); 201 return Ty::from_type_relative_path(ctx, ty, path.segments());
208 } 202 }
209 let (resolution, remaining_index) = 203 let (resolution, remaining_index) =
210 match resolver.resolve_path_in_type_ns(db, path.mod_path()) { 204 match ctx.resolver.resolve_path_in_type_ns(ctx.db, path.mod_path()) {
211 Some(it) => it, 205 Some(it) => it,
212 None => return Ty::Unknown, 206 None => return Ty::Unknown,
213 }; 207 };
@@ -218,18 +212,11 @@ impl Ty {
218 ), 212 ),
219 Some(i) => (path.segments().get(i - 1).unwrap(), path.segments().skip(i)), 213 Some(i) => (path.segments().get(i - 1).unwrap(), path.segments().skip(i)),
220 }; 214 };
221 Ty::from_partly_resolved_hir_path( 215 Ty::from_partly_resolved_hir_path(ctx, resolution, resolved_segment, remaining_segments)
222 db,
223 resolver,
224 resolution,
225 resolved_segment,
226 remaining_segments,
227 )
228 } 216 }
229 217
230 fn select_associated_type( 218 fn select_associated_type(
231 db: &impl HirDatabase, 219 ctx: &TyLoweringContext<'_, impl HirDatabase>,
232 resolver: &Resolver,
233 self_ty: Ty, 220 self_ty: Ty,
234 segment: PathSegment<'_>, 221 segment: PathSegment<'_>,
235 ) -> Ty { 222 ) -> Ty {
@@ -237,20 +224,23 @@ impl Ty {
237 Ty::Param { idx, .. } => idx, 224 Ty::Param { idx, .. } => idx,
238 _ => return Ty::Unknown, // Error: Ambiguous associated type 225 _ => return Ty::Unknown, // Error: Ambiguous associated type
239 }; 226 };
240 let def = match resolver.generic_def() { 227 let def = match ctx.resolver.generic_def() {
241 Some(def) => def, 228 Some(def) => def,
242 None => return Ty::Unknown, // this can't actually happen 229 None => return Ty::Unknown, // this can't actually happen
243 }; 230 };
244 let predicates = db.generic_predicates_for_param(def.into(), param_idx); 231 let predicates = ctx.db.generic_predicates_for_param(def.into(), param_idx);
245 let traits_from_env = predicates.iter().filter_map(|pred| match pred { 232 let traits_from_env = predicates.iter().filter_map(|pred| match pred {
246 GenericPredicate::Implemented(tr) if tr.self_ty() == &self_ty => Some(tr.trait_), 233 GenericPredicate::Implemented(tr) if tr.self_ty() == &self_ty => Some(tr.trait_),
247 _ => None, 234 _ => None,
248 }); 235 });
249 let traits = traits_from_env.flat_map(|t| all_super_traits(db, t)); 236 let traits = traits_from_env.flat_map(|t| all_super_traits(ctx.db, t));
250 for t in traits { 237 for t in traits {
251 if let Some(associated_ty) = db.trait_data(t).associated_type_by_name(&segment.name) { 238 if let Some(associated_ty) = ctx.db.trait_data(t).associated_type_by_name(&segment.name)
252 let substs = 239 {
253 Substs::build_for_def(db, t).push(self_ty.clone()).fill_with_unknown().build(); 240 let substs = Substs::build_for_def(ctx.db, t)
241 .push(self_ty.clone())
242 .fill_with_unknown()
243 .build();
254 // FIXME handle type parameters on the segment 244 // FIXME handle type parameters on the segment
255 return Ty::Projection(ProjectionTy { associated_ty, parameters: substs }); 245 return Ty::Projection(ProjectionTy { associated_ty, parameters: substs });
256 } 246 }
@@ -259,8 +249,7 @@ impl Ty {
259 } 249 }
260 250
261 fn from_hir_path_inner( 251 fn from_hir_path_inner(
262 db: &impl HirDatabase, 252 ctx: &TyLoweringContext<'_, impl HirDatabase>,
263 resolver: &Resolver,
264 segment: PathSegment<'_>, 253 segment: PathSegment<'_>,
265 typable: TyDefId, 254 typable: TyDefId,
266 ) -> Ty { 255 ) -> Ty {
@@ -269,15 +258,14 @@ impl Ty {
269 TyDefId::AdtId(it) => Some(it.into()), 258 TyDefId::AdtId(it) => Some(it.into()),
270 TyDefId::TypeAliasId(it) => Some(it.into()), 259 TyDefId::TypeAliasId(it) => Some(it.into()),
271 }; 260 };
272 let substs = substs_from_path_segment(db, resolver, segment, generic_def, false); 261 let substs = substs_from_path_segment(ctx, segment, generic_def, false);
273 db.ty(typable).subst(&substs) 262 ctx.db.ty(typable).subst(&substs)
274 } 263 }
275 264
276 /// Collect generic arguments from a path into a `Substs`. See also 265 /// Collect generic arguments from a path into a `Substs`. See also
277 /// `create_substs_for_ast_path` and `def_to_ty` in rustc. 266 /// `create_substs_for_ast_path` and `def_to_ty` in rustc.
278 pub(super) fn substs_from_path( 267 pub(super) fn substs_from_path(
279 db: &impl HirDatabase, 268 ctx: &TyLoweringContext<'_, impl HirDatabase>,
280 resolver: &Resolver,
281 path: &Path, 269 path: &Path,
282 // Note that we don't call `db.value_type(resolved)` here, 270 // Note that we don't call `db.value_type(resolved)` here,
283 // `ValueTyDefId` is just a convenient way to pass generics and 271 // `ValueTyDefId` is just a convenient way to pass generics and
@@ -305,19 +293,18 @@ impl Ty {
305 (segment, Some(var.parent.into())) 293 (segment, Some(var.parent.into()))
306 } 294 }
307 }; 295 };
308 substs_from_path_segment(db, resolver, segment, generic_def, false) 296 substs_from_path_segment(ctx, segment, generic_def, false)
309 } 297 }
310} 298}
311 299
312pub(super) fn substs_from_path_segment( 300pub(super) fn substs_from_path_segment(
313 db: &impl HirDatabase, 301 ctx: &TyLoweringContext<'_, impl HirDatabase>,
314 resolver: &Resolver,
315 segment: PathSegment<'_>, 302 segment: PathSegment<'_>,
316 def_generic: Option<GenericDefId>, 303 def_generic: Option<GenericDefId>,
317 add_self_param: bool, 304 add_self_param: bool,
318) -> Substs { 305) -> Substs {
319 let mut substs = Vec::new(); 306 let mut substs = Vec::new();
320 let def_generics = def_generic.map(|def| generics(db, def.into())); 307 let def_generics = def_generic.map(|def| generics(ctx.db, def.into()));
321 308
322 let (total_len, parent_len, child_len) = def_generics.map_or((0, 0, 0), |g| g.len_split()); 309 let (total_len, parent_len, child_len) = def_generics.map_or((0, 0, 0), |g| g.len_split());
323 substs.extend(iter::repeat(Ty::Unknown).take(parent_len)); 310 substs.extend(iter::repeat(Ty::Unknown).take(parent_len));
@@ -335,7 +322,7 @@ pub(super) fn substs_from_path_segment(
335 for arg in generic_args.args.iter().take(child_len) { 322 for arg in generic_args.args.iter().take(child_len) {
336 match arg { 323 match arg {
337 GenericArg::Type(type_ref) => { 324 GenericArg::Type(type_ref) => {
338 let ty = Ty::from_hir(db, resolver, type_ref); 325 let ty = Ty::from_hir(ctx, type_ref);
339 substs.push(ty); 326 substs.push(ty);
340 } 327 }
341 } 328 }
@@ -350,7 +337,7 @@ pub(super) fn substs_from_path_segment(
350 337
351 // handle defaults 338 // handle defaults
352 if let Some(def_generic) = def_generic { 339 if let Some(def_generic) = def_generic {
353 let default_substs = db.generic_defaults(def_generic.into()); 340 let default_substs = ctx.db.generic_defaults(def_generic.into());
354 assert_eq!(substs.len(), default_substs.len()); 341 assert_eq!(substs.len(), default_substs.len());
355 342
356 for (i, default_ty) in default_substs.iter().enumerate() { 343 for (i, default_ty) in default_substs.iter().enumerate() {
@@ -365,27 +352,25 @@ pub(super) fn substs_from_path_segment(
365 352
366impl TraitRef { 353impl TraitRef {
367 fn from_path( 354 fn from_path(
368 db: &impl HirDatabase, 355 ctx: &TyLoweringContext<'_, impl HirDatabase>,
369 resolver: &Resolver,
370 path: &Path, 356 path: &Path,
371 explicit_self_ty: Option<Ty>, 357 explicit_self_ty: Option<Ty>,
372 ) -> Option<Self> { 358 ) -> Option<Self> {
373 let resolved = match resolver.resolve_path_in_type_ns_fully(db, path.mod_path())? { 359 let resolved = match ctx.resolver.resolve_path_in_type_ns_fully(ctx.db, path.mod_path())? {
374 TypeNs::TraitId(tr) => tr, 360 TypeNs::TraitId(tr) => tr,
375 _ => return None, 361 _ => return None,
376 }; 362 };
377 let segment = path.segments().last().expect("path should have at least one segment"); 363 let segment = path.segments().last().expect("path should have at least one segment");
378 Some(TraitRef::from_resolved_path(db, resolver, resolved.into(), segment, explicit_self_ty)) 364 Some(TraitRef::from_resolved_path(ctx, resolved.into(), segment, explicit_self_ty))
379 } 365 }
380 366
381 pub(crate) fn from_resolved_path( 367 pub(crate) fn from_resolved_path(
382 db: &impl HirDatabase, 368 ctx: &TyLoweringContext<'_, impl HirDatabase>,
383 resolver: &Resolver,
384 resolved: TraitId, 369 resolved: TraitId,
385 segment: PathSegment<'_>, 370 segment: PathSegment<'_>,
386 explicit_self_ty: Option<Ty>, 371 explicit_self_ty: Option<Ty>,
387 ) -> Self { 372 ) -> Self {
388 let mut substs = TraitRef::substs_from_path(db, resolver, segment, resolved); 373 let mut substs = TraitRef::substs_from_path(ctx, segment, resolved);
389 if let Some(self_ty) = explicit_self_ty { 374 if let Some(self_ty) = explicit_self_ty {
390 make_mut_slice(&mut substs.0)[0] = self_ty; 375 make_mut_slice(&mut substs.0)[0] = self_ty;
391 } 376 }
@@ -393,8 +378,7 @@ impl TraitRef {
393 } 378 }
394 379
395 fn from_hir( 380 fn from_hir(
396 db: &impl HirDatabase, 381 ctx: &TyLoweringContext<'_, impl HirDatabase>,
397 resolver: &Resolver,
398 type_ref: &TypeRef, 382 type_ref: &TypeRef,
399 explicit_self_ty: Option<Ty>, 383 explicit_self_ty: Option<Ty>,
400 ) -> Option<Self> { 384 ) -> Option<Self> {
@@ -402,28 +386,26 @@ impl TraitRef {
402 TypeRef::Path(path) => path, 386 TypeRef::Path(path) => path,
403 _ => return None, 387 _ => return None,
404 }; 388 };
405 TraitRef::from_path(db, resolver, path, explicit_self_ty) 389 TraitRef::from_path(ctx, path, explicit_self_ty)
406 } 390 }
407 391
408 fn substs_from_path( 392 fn substs_from_path(
409 db: &impl HirDatabase, 393 ctx: &TyLoweringContext<'_, impl HirDatabase>,
410 resolver: &Resolver,
411 segment: PathSegment<'_>, 394 segment: PathSegment<'_>,
412 resolved: TraitId, 395 resolved: TraitId,
413 ) -> Substs { 396 ) -> Substs {
414 let has_self_param = 397 let has_self_param =
415 segment.args_and_bindings.as_ref().map(|a| a.has_self_type).unwrap_or(false); 398 segment.args_and_bindings.as_ref().map(|a| a.has_self_type).unwrap_or(false);
416 substs_from_path_segment(db, resolver, segment, Some(resolved.into()), !has_self_param) 399 substs_from_path_segment(ctx, segment, Some(resolved.into()), !has_self_param)
417 } 400 }
418 401
419 pub(crate) fn from_type_bound( 402 pub(crate) fn from_type_bound(
420 db: &impl HirDatabase, 403 ctx: &TyLoweringContext<'_, impl HirDatabase>,
421 resolver: &Resolver,
422 bound: &TypeBound, 404 bound: &TypeBound,
423 self_ty: Ty, 405 self_ty: Ty,
424 ) -> Option<TraitRef> { 406 ) -> Option<TraitRef> {
425 match bound { 407 match bound {
426 TypeBound::Path(path) => TraitRef::from_path(db, resolver, path, Some(self_ty)), 408 TypeBound::Path(path) => TraitRef::from_path(ctx, path, Some(self_ty)),
427 TypeBound::Error => None, 409 TypeBound::Error => None,
428 } 410 }
429 } 411 }
@@ -431,33 +413,30 @@ impl TraitRef {
431 413
432impl GenericPredicate { 414impl GenericPredicate {
433 pub(crate) fn from_where_predicate<'a>( 415 pub(crate) fn from_where_predicate<'a>(
434 db: &'a impl HirDatabase, 416 ctx: &'a TyLoweringContext<'a, impl HirDatabase>,
435 resolver: &'a Resolver,
436 where_predicate: &'a WherePredicate, 417 where_predicate: &'a WherePredicate,
437 ) -> impl Iterator<Item = GenericPredicate> + 'a { 418 ) -> impl Iterator<Item = GenericPredicate> + 'a {
438 let self_ty = Ty::from_hir(db, resolver, &where_predicate.type_ref); 419 let self_ty = Ty::from_hir(ctx, &where_predicate.type_ref);
439 GenericPredicate::from_type_bound(db, resolver, &where_predicate.bound, self_ty) 420 GenericPredicate::from_type_bound(ctx, &where_predicate.bound, self_ty)
440 } 421 }
441 422
442 pub(crate) fn from_type_bound<'a>( 423 pub(crate) fn from_type_bound<'a>(
443 db: &'a impl HirDatabase, 424 ctx: &'a TyLoweringContext<'a, impl HirDatabase>,
444 resolver: &'a Resolver,
445 bound: &'a TypeBound, 425 bound: &'a TypeBound,
446 self_ty: Ty, 426 self_ty: Ty,
447 ) -> impl Iterator<Item = GenericPredicate> + 'a { 427 ) -> impl Iterator<Item = GenericPredicate> + 'a {
448 let trait_ref = TraitRef::from_type_bound(db, &resolver, bound, self_ty); 428 let trait_ref = TraitRef::from_type_bound(ctx, bound, self_ty);
449 iter::once(trait_ref.clone().map_or(GenericPredicate::Error, GenericPredicate::Implemented)) 429 iter::once(trait_ref.clone().map_or(GenericPredicate::Error, GenericPredicate::Implemented))
450 .chain( 430 .chain(
451 trait_ref.into_iter().flat_map(move |tr| { 431 trait_ref
452 assoc_type_bindings_from_type_bound(db, resolver, bound, tr) 432 .into_iter()
453 }), 433 .flat_map(move |tr| assoc_type_bindings_from_type_bound(ctx, bound, tr)),
454 ) 434 )
455 } 435 }
456} 436}
457 437
458fn assoc_type_bindings_from_type_bound<'a>( 438fn assoc_type_bindings_from_type_bound<'a>(
459 db: &'a impl HirDatabase, 439 ctx: &'a TyLoweringContext<'a, impl HirDatabase>,
460 resolver: &'a Resolver,
461 bound: &'a TypeBound, 440 bound: &'a TypeBound,
462 trait_ref: TraitRef, 441 trait_ref: TraitRef,
463) -> impl Iterator<Item = GenericPredicate> + 'a { 442) -> impl Iterator<Item = GenericPredicate> + 'a {
@@ -471,14 +450,14 @@ fn assoc_type_bindings_from_type_bound<'a>(
471 .flat_map(|args_and_bindings| args_and_bindings.bindings.iter()) 450 .flat_map(|args_and_bindings| args_and_bindings.bindings.iter())
472 .map(move |(name, type_ref)| { 451 .map(move |(name, type_ref)| {
473 let associated_ty = 452 let associated_ty =
474 associated_type_by_name_including_super_traits(db, trait_ref.trait_, &name); 453 associated_type_by_name_including_super_traits(ctx.db, trait_ref.trait_, &name);
475 let associated_ty = match associated_ty { 454 let associated_ty = match associated_ty {
476 None => return GenericPredicate::Error, 455 None => return GenericPredicate::Error,
477 Some(t) => t, 456 Some(t) => t,
478 }; 457 };
479 let projection_ty = 458 let projection_ty =
480 ProjectionTy { associated_ty, parameters: trait_ref.substs.clone() }; 459 ProjectionTy { associated_ty, parameters: trait_ref.substs.clone() };
481 let ty = Ty::from_hir(db, resolver, type_ref); 460 let ty = Ty::from_hir(ctx, type_ref);
482 let projection_predicate = ProjectionPredicate { projection_ty, ty }; 461 let projection_predicate = ProjectionPredicate { projection_ty, ty };
483 GenericPredicate::Projection(projection_predicate) 462 GenericPredicate::Projection(projection_predicate)
484 }) 463 })
@@ -505,8 +484,9 @@ pub(crate) fn field_types_query(
505 VariantId::EnumVariantId(it) => it.parent.resolver(db), 484 VariantId::EnumVariantId(it) => it.parent.resolver(db),
506 }; 485 };
507 let mut res = ArenaMap::default(); 486 let mut res = ArenaMap::default();
487 let ctx = TyLoweringContext { db, resolver: &resolver };
508 for (field_id, field_data) in var_data.fields().iter() { 488 for (field_id, field_data) in var_data.fields().iter() {
509 res.insert(field_id, Ty::from_hir(db, &resolver, &field_data.type_ref)) 489 res.insert(field_id, Ty::from_hir(&ctx, &field_data.type_ref))
510 } 490 }
511 Arc::new(res) 491 Arc::new(res)
512} 492}
@@ -525,11 +505,12 @@ pub(crate) fn generic_predicates_for_param_query(
525 param_idx: u32, 505 param_idx: u32,
526) -> Arc<[GenericPredicate]> { 506) -> Arc<[GenericPredicate]> {
527 let resolver = def.resolver(db); 507 let resolver = def.resolver(db);
508 let ctx = TyLoweringContext { db, resolver: &resolver };
528 resolver 509 resolver
529 .where_predicates_in_scope() 510 .where_predicates_in_scope()
530 // we have to filter out all other predicates *first*, before attempting to lower them 511 // we have to filter out all other predicates *first*, before attempting to lower them
531 .filter(|pred| Ty::from_hir_only_param(db, &resolver, &pred.type_ref) == Some(param_idx)) 512 .filter(|pred| Ty::from_hir_only_param(&ctx, &pred.type_ref) == Some(param_idx))
532 .flat_map(|pred| GenericPredicate::from_where_predicate(db, &resolver, pred)) 513 .flat_map(|pred| GenericPredicate::from_where_predicate(&ctx, pred))
533 .collect() 514 .collect()
534} 515}
535 516
@@ -543,10 +524,11 @@ pub(crate) fn generic_predicates_for_param_recover(
543} 524}
544 525
545impl TraitEnvironment { 526impl TraitEnvironment {
546 pub fn lower(db: &impl HirDatabase, resolver: &Resolver) -> Arc<TraitEnvironment> { 527 pub fn lower(ctx: &TyLoweringContext<'_, impl HirDatabase>) -> Arc<TraitEnvironment> {
547 let predicates = resolver 528 let predicates = ctx
529 .resolver
548 .where_predicates_in_scope() 530 .where_predicates_in_scope()
549 .flat_map(|pred| GenericPredicate::from_where_predicate(db, &resolver, pred)) 531 .flat_map(|pred| GenericPredicate::from_where_predicate(ctx, pred))
550 .collect::<Vec<_>>(); 532 .collect::<Vec<_>>();
551 533
552 Arc::new(TraitEnvironment { predicates }) 534 Arc::new(TraitEnvironment { predicates })
@@ -559,20 +541,22 @@ pub(crate) fn generic_predicates_query(
559 def: GenericDefId, 541 def: GenericDefId,
560) -> Arc<[GenericPredicate]> { 542) -> Arc<[GenericPredicate]> {
561 let resolver = def.resolver(db); 543 let resolver = def.resolver(db);
544 let ctx = TyLoweringContext { db, resolver: &resolver };
562 resolver 545 resolver
563 .where_predicates_in_scope() 546 .where_predicates_in_scope()
564 .flat_map(|pred| GenericPredicate::from_where_predicate(db, &resolver, pred)) 547 .flat_map(|pred| GenericPredicate::from_where_predicate(&ctx, pred))
565 .collect() 548 .collect()
566} 549}
567 550
568/// Resolve the default type params from generics 551/// Resolve the default type params from generics
569pub(crate) fn generic_defaults_query(db: &impl HirDatabase, def: GenericDefId) -> Substs { 552pub(crate) fn generic_defaults_query(db: &impl HirDatabase, def: GenericDefId) -> Substs {
570 let resolver = def.resolver(db); 553 let resolver = def.resolver(db);
554 let ctx = TyLoweringContext { db, resolver: &resolver };
571 let generic_params = generics(db, def.into()); 555 let generic_params = generics(db, def.into());
572 556
573 let defaults = generic_params 557 let defaults = generic_params
574 .iter() 558 .iter()
575 .map(|(_idx, p)| p.default.as_ref().map_or(Ty::Unknown, |t| Ty::from_hir(db, &resolver, t))) 559 .map(|(_idx, p)| p.default.as_ref().map_or(Ty::Unknown, |t| Ty::from_hir(&ctx, t)))
576 .collect(); 560 .collect();
577 561
578 Substs(defaults) 562 Substs(defaults)
@@ -581,8 +565,9 @@ pub(crate) fn generic_defaults_query(db: &impl HirDatabase, def: GenericDefId) -
581fn fn_sig_for_fn(db: &impl HirDatabase, def: FunctionId) -> FnSig { 565fn fn_sig_for_fn(db: &impl HirDatabase, def: FunctionId) -> FnSig {
582 let data = db.function_data(def); 566 let data = db.function_data(def);
583 let resolver = def.resolver(db); 567 let resolver = def.resolver(db);
584 let params = data.params.iter().map(|tr| Ty::from_hir(db, &resolver, tr)).collect::<Vec<_>>(); 568 let ctx = TyLoweringContext { db, resolver: &resolver };
585 let ret = Ty::from_hir(db, &resolver, &data.ret_type); 569 let params = data.params.iter().map(|tr| Ty::from_hir(&ctx, tr)).collect::<Vec<_>>();
570 let ret = Ty::from_hir(&ctx, &data.ret_type);
586 FnSig::from_params_and_return(params, ret) 571 FnSig::from_params_and_return(params, ret)
587} 572}
588 573
@@ -598,16 +583,18 @@ fn type_for_fn(db: &impl HirDatabase, def: FunctionId) -> Ty {
598fn type_for_const(db: &impl HirDatabase, def: ConstId) -> Ty { 583fn type_for_const(db: &impl HirDatabase, def: ConstId) -> Ty {
599 let data = db.const_data(def); 584 let data = db.const_data(def);
600 let resolver = def.resolver(db); 585 let resolver = def.resolver(db);
586 let ctx = TyLoweringContext { db, resolver: &resolver };
601 587
602 Ty::from_hir(db, &resolver, &data.type_ref) 588 Ty::from_hir(&ctx, &data.type_ref)
603} 589}
604 590
605/// Build the declared type of a static. 591/// Build the declared type of a static.
606fn type_for_static(db: &impl HirDatabase, def: StaticId) -> Ty { 592fn type_for_static(db: &impl HirDatabase, def: StaticId) -> Ty {
607 let data = db.static_data(def); 593 let data = db.static_data(def);
608 let resolver = def.resolver(db); 594 let resolver = def.resolver(db);
595 let ctx = TyLoweringContext { db, resolver: &resolver };
609 596
610 Ty::from_hir(db, &resolver, &data.type_ref) 597 Ty::from_hir(&ctx, &data.type_ref)
611} 598}
612 599
613/// Build the declared type of a static. 600/// Build the declared type of a static.
@@ -625,10 +612,9 @@ fn fn_sig_for_struct_constructor(db: &impl HirDatabase, def: StructId) -> FnSig
625 let struct_data = db.struct_data(def.into()); 612 let struct_data = db.struct_data(def.into());
626 let fields = struct_data.variant_data.fields(); 613 let fields = struct_data.variant_data.fields();
627 let resolver = def.resolver(db); 614 let resolver = def.resolver(db);
628 let params = fields 615 let ctx = TyLoweringContext { db, resolver: &resolver };
629 .iter() 616 let params =
630 .map(|(_, field)| Ty::from_hir(db, &resolver, &field.type_ref)) 617 fields.iter().map(|(_, field)| Ty::from_hir(&ctx, &field.type_ref)).collect::<Vec<_>>();
631 .collect::<Vec<_>>();
632 let ret = type_for_adt(db, def.into()); 618 let ret = type_for_adt(db, def.into());
633 FnSig::from_params_and_return(params, ret) 619 FnSig::from_params_and_return(params, ret)
634} 620}
@@ -649,10 +635,9 @@ fn fn_sig_for_enum_variant_constructor(db: &impl HirDatabase, def: EnumVariantId
649 let var_data = &enum_data.variants[def.local_id]; 635 let var_data = &enum_data.variants[def.local_id];
650 let fields = var_data.variant_data.fields(); 636 let fields = var_data.variant_data.fields();
651 let resolver = def.parent.resolver(db); 637 let resolver = def.parent.resolver(db);
652 let params = fields 638 let ctx = TyLoweringContext { db, resolver: &resolver };
653 .iter() 639 let params =
654 .map(|(_, field)| Ty::from_hir(db, &resolver, &field.type_ref)) 640 fields.iter().map(|(_, field)| Ty::from_hir(&ctx, &field.type_ref)).collect::<Vec<_>>();
655 .collect::<Vec<_>>();
656 let generics = generics(db, def.parent.into()); 641 let generics = generics(db, def.parent.into());
657 let substs = Substs::identity(&generics); 642 let substs = Substs::identity(&generics);
658 let ret = type_for_adt(db, def.parent.into()).subst(&substs); 643 let ret = type_for_adt(db, def.parent.into()).subst(&substs);
@@ -679,9 +664,10 @@ fn type_for_adt(db: &impl HirDatabase, adt: AdtId) -> Ty {
679fn type_for_type_alias(db: &impl HirDatabase, t: TypeAliasId) -> Ty { 664fn type_for_type_alias(db: &impl HirDatabase, t: TypeAliasId) -> Ty {
680 let generics = generics(db, t.into()); 665 let generics = generics(db, t.into());
681 let resolver = t.resolver(db); 666 let resolver = t.resolver(db);
667 let ctx = TyLoweringContext { db, resolver: &resolver };
682 let type_ref = &db.type_alias_data(t).type_ref; 668 let type_ref = &db.type_alias_data(t).type_ref;
683 let substs = Substs::identity(&generics); 669 let substs = Substs::identity(&generics);
684 let inner = Ty::from_hir(db, &resolver, type_ref.as_ref().unwrap_or(&TypeRef::Error)); 670 let inner = Ty::from_hir(&ctx, type_ref.as_ref().unwrap_or(&TypeRef::Error));
685 inner.subst(&substs) 671 inner.subst(&substs)
686} 672}
687 673
@@ -761,7 +747,8 @@ pub(crate) fn value_ty_query(db: &impl HirDatabase, def: ValueTyDefId) -> Ty {
761pub(crate) fn impl_self_ty_query(db: &impl HirDatabase, impl_id: ImplId) -> Ty { 747pub(crate) fn impl_self_ty_query(db: &impl HirDatabase, impl_id: ImplId) -> Ty {
762 let impl_data = db.impl_data(impl_id); 748 let impl_data = db.impl_data(impl_id);
763 let resolver = impl_id.resolver(db); 749 let resolver = impl_id.resolver(db);
764 Ty::from_hir(db, &resolver, &impl_data.target_type) 750 let ctx = TyLoweringContext { db, resolver: &resolver };
751 Ty::from_hir(&ctx, &impl_data.target_type)
765} 752}
766 753
767pub(crate) fn impl_self_ty_recover( 754pub(crate) fn impl_self_ty_recover(
@@ -775,7 +762,8 @@ pub(crate) fn impl_self_ty_recover(
775pub(crate) fn impl_trait_query(db: &impl HirDatabase, impl_id: ImplId) -> Option<TraitRef> { 762pub(crate) fn impl_trait_query(db: &impl HirDatabase, impl_id: ImplId) -> Option<TraitRef> {
776 let impl_data = db.impl_data(impl_id); 763 let impl_data = db.impl_data(impl_id);
777 let resolver = impl_id.resolver(db); 764 let resolver = impl_id.resolver(db);
765 let ctx = TyLoweringContext { db, resolver: &resolver };
778 let self_ty = db.impl_self_ty(impl_id); 766 let self_ty = db.impl_self_ty(impl_id);
779 let target_trait = impl_data.target_trait.as_ref()?; 767 let target_trait = impl_data.target_trait.as_ref()?;
780 TraitRef::from_hir(db, &resolver, target_trait, Some(self_ty.clone())) 768 TraitRef::from_hir(&ctx, target_trait, Some(self_ty.clone()))
781} 769}