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[rust.git] / crates / hir_ty / src / db.rs
1 //! The home of `HirDatabase`, which is the Salsa database containing all the
2 //! type inference-related queries.
3
4 use std::sync::Arc;
5
6 use base_db::{impl_intern_key, salsa, CrateId, Upcast};
7 use hir_def::{
8     db::DefDatabase, expr::ExprId, BlockId, ConstParamId, DefWithBodyId, FunctionId, GenericDefId,
9     ImplId, LifetimeParamId, LocalFieldId, TypeParamId, VariantId,
10 };
11 use la_arena::ArenaMap;
12
13 use crate::{
14     chalk_db,
15     method_resolution::{InherentImpls, TraitImpls},
16     Binders, CallableDefId, FnDefId, ImplTraitId, InferenceResult, Interner, PolyFnSig,
17     QuantifiedWhereClause, ReturnTypeImplTraits, TraitRef, Ty, TyDefId, ValueTyDefId,
18 };
19 use hir_expand::name::Name;
20
21 #[salsa::query_group(HirDatabaseStorage)]
22 pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> {
23     #[salsa::invoke(infer_wait)]
24     #[salsa::transparent]
25     fn infer(&self, def: DefWithBodyId) -> Arc<InferenceResult>;
26
27     #[salsa::invoke(crate::infer::infer_query)]
28     fn infer_query(&self, def: DefWithBodyId) -> Arc<InferenceResult>;
29
30     #[salsa::invoke(crate::lower::ty_query)]
31     #[salsa::cycle(crate::lower::ty_recover)]
32     fn ty(&self, def: TyDefId) -> Binders<Ty>;
33
34     #[salsa::invoke(crate::lower::value_ty_query)]
35     fn value_ty(&self, def: ValueTyDefId) -> Binders<Ty>;
36
37     #[salsa::invoke(crate::lower::impl_self_ty_query)]
38     #[salsa::cycle(crate::lower::impl_self_ty_recover)]
39     fn impl_self_ty(&self, def: ImplId) -> Binders<Ty>;
40
41     #[salsa::invoke(crate::lower::const_param_ty_query)]
42     fn const_param_ty(&self, def: ConstParamId) -> Ty;
43
44     #[salsa::invoke(crate::lower::impl_trait_query)]
45     fn impl_trait(&self, def: ImplId) -> Option<Binders<TraitRef>>;
46
47     #[salsa::invoke(crate::lower::field_types_query)]
48     fn field_types(&self, var: VariantId) -> Arc<ArenaMap<LocalFieldId, Binders<Ty>>>;
49
50     #[salsa::invoke(crate::callable_item_sig)]
51     fn callable_item_signature(&self, def: CallableDefId) -> PolyFnSig;
52
53     #[salsa::invoke(crate::lower::return_type_impl_traits)]
54     fn return_type_impl_traits(
55         &self,
56         def: FunctionId,
57     ) -> Option<Arc<Binders<ReturnTypeImplTraits>>>;
58
59     #[salsa::invoke(crate::lower::generic_predicates_for_param_query)]
60     #[salsa::cycle(crate::lower::generic_predicates_for_param_recover)]
61     fn generic_predicates_for_param(
62         &self,
63         param_id: TypeParamId,
64         assoc_name: Option<Name>,
65     ) -> Arc<[Binders<QuantifiedWhereClause>]>;
66
67     #[salsa::invoke(crate::lower::generic_predicates_query)]
68     fn generic_predicates(&self, def: GenericDefId) -> Arc<[Binders<QuantifiedWhereClause>]>;
69
70     #[salsa::invoke(crate::lower::trait_environment_query)]
71     fn trait_environment(&self, def: GenericDefId) -> Arc<crate::TraitEnvironment>;
72
73     #[salsa::invoke(crate::lower::generic_defaults_query)]
74     #[salsa::cycle(crate::lower::generic_defaults_recover)]
75     fn generic_defaults(&self, def: GenericDefId) -> Arc<[Binders<Ty>]>;
76
77     #[salsa::invoke(InherentImpls::inherent_impls_in_crate_query)]
78     fn inherent_impls_in_crate(&self, krate: CrateId) -> Arc<InherentImpls>;
79
80     #[salsa::invoke(InherentImpls::inherent_impls_in_block_query)]
81     fn inherent_impls_in_block(&self, block: BlockId) -> Option<Arc<InherentImpls>>;
82
83     #[salsa::invoke(TraitImpls::trait_impls_in_crate_query)]
84     fn trait_impls_in_crate(&self, krate: CrateId) -> Arc<TraitImpls>;
85
86     #[salsa::invoke(TraitImpls::trait_impls_in_block_query)]
87     fn trait_impls_in_block(&self, krate: BlockId) -> Option<Arc<TraitImpls>>;
88
89     #[salsa::invoke(TraitImpls::trait_impls_in_deps_query)]
90     fn trait_impls_in_deps(&self, krate: CrateId) -> Arc<TraitImpls>;
91
92     // Interned IDs for Chalk integration
93     #[salsa::interned]
94     fn intern_callable_def(&self, callable_def: CallableDefId) -> InternedCallableDefId;
95     #[salsa::interned]
96     fn intern_type_param_id(&self, param_id: TypeParamId) -> InternedTypeParamId;
97     #[salsa::interned]
98     fn intern_lifetime_param_id(&self, param_id: LifetimeParamId) -> InternedLifetimeParamId;
99     #[salsa::interned]
100     fn intern_const_param_id(&self, param_id: ConstParamId) -> InternedConstParamId;
101     #[salsa::interned]
102     fn intern_impl_trait_id(&self, id: ImplTraitId) -> InternedOpaqueTyId;
103     #[salsa::interned]
104     fn intern_closure(&self, id: (DefWithBodyId, ExprId)) -> InternedClosureId;
105
106     #[salsa::invoke(chalk_db::associated_ty_data_query)]
107     fn associated_ty_data(&self, id: chalk_db::AssocTypeId) -> Arc<chalk_db::AssociatedTyDatum>;
108
109     #[salsa::invoke(chalk_db::trait_datum_query)]
110     fn trait_datum(&self, krate: CrateId, trait_id: chalk_db::TraitId)
111         -> Arc<chalk_db::TraitDatum>;
112
113     #[salsa::invoke(chalk_db::struct_datum_query)]
114     fn struct_datum(
115         &self,
116         krate: CrateId,
117         struct_id: chalk_db::AdtId,
118     ) -> Arc<chalk_db::StructDatum>;
119
120     #[salsa::invoke(chalk_db::impl_datum_query)]
121     fn impl_datum(&self, krate: CrateId, impl_id: chalk_db::ImplId) -> Arc<chalk_db::ImplDatum>;
122
123     #[salsa::invoke(chalk_db::fn_def_datum_query)]
124     fn fn_def_datum(&self, krate: CrateId, fn_def_id: FnDefId) -> Arc<chalk_db::FnDefDatum>;
125
126     #[salsa::invoke(chalk_db::fn_def_variance_query)]
127     fn fn_def_variance(&self, fn_def_id: FnDefId) -> chalk_db::Variances;
128
129     #[salsa::invoke(chalk_db::adt_variance_query)]
130     fn adt_variance(&self, adt_id: chalk_db::AdtId) -> chalk_db::Variances;
131
132     #[salsa::invoke(chalk_db::associated_ty_value_query)]
133     fn associated_ty_value(
134         &self,
135         krate: CrateId,
136         id: chalk_db::AssociatedTyValueId,
137     ) -> Arc<chalk_db::AssociatedTyValue>;
138
139     #[salsa::invoke(trait_solve_wait)]
140     #[salsa::transparent]
141     fn trait_solve(
142         &self,
143         krate: CrateId,
144         goal: crate::Canonical<crate::InEnvironment<crate::Goal>>,
145     ) -> Option<crate::Solution>;
146
147     #[salsa::invoke(crate::traits::trait_solve_query)]
148     fn trait_solve_query(
149         &self,
150         krate: CrateId,
151         goal: crate::Canonical<crate::InEnvironment<crate::Goal>>,
152     ) -> Option<crate::Solution>;
153
154     #[salsa::invoke(chalk_db::program_clauses_for_chalk_env_query)]
155     fn program_clauses_for_chalk_env(
156         &self,
157         krate: CrateId,
158         env: chalk_ir::Environment<Interner>,
159     ) -> chalk_ir::ProgramClauses<Interner>;
160 }
161
162 fn infer_wait(db: &dyn HirDatabase, def: DefWithBodyId) -> Arc<InferenceResult> {
163     let _p = profile::span("infer:wait").detail(|| match def {
164         DefWithBodyId::FunctionId(it) => db.function_data(it).name.to_string(),
165         DefWithBodyId::StaticId(it) => db.static_data(it).name.clone().to_string(),
166         DefWithBodyId::ConstId(it) => {
167             db.const_data(it).name.clone().unwrap_or_else(Name::missing).to_string()
168         }
169     });
170     db.infer_query(def)
171 }
172
173 fn trait_solve_wait(
174     db: &dyn HirDatabase,
175     krate: CrateId,
176     goal: crate::Canonical<crate::InEnvironment<crate::Goal>>,
177 ) -> Option<crate::Solution> {
178     let _p = profile::span("trait_solve::wait");
179     db.trait_solve_query(krate, goal)
180 }
181
182 #[test]
183 fn hir_database_is_object_safe() {
184     fn _assert_object_safe(_: &dyn HirDatabase) {}
185 }
186
187 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
188 pub struct InternedTypeParamId(salsa::InternId);
189 impl_intern_key!(InternedTypeParamId);
190
191 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
192 pub struct InternedLifetimeParamId(salsa::InternId);
193 impl_intern_key!(InternedLifetimeParamId);
194
195 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
196 pub struct InternedConstParamId(salsa::InternId);
197 impl_intern_key!(InternedConstParamId);
198
199 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
200 pub struct InternedOpaqueTyId(salsa::InternId);
201 impl_intern_key!(InternedOpaqueTyId);
202
203 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
204 pub struct InternedClosureId(salsa::InternId);
205 impl_intern_key!(InternedClosureId);
206
207 /// This exists just for Chalk, because Chalk just has a single `FnDefId` where
208 /// we have different IDs for struct and enum variant constructors.
209 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd)]
210 pub struct InternedCallableDefId(salsa::InternId);
211 impl_intern_key!(InternedCallableDefId);