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-rw-r--r--crates/ra_hir_ty/src/traits/chalk.rs899
-rw-r--r--crates/ra_hir_ty/src/traits/chalk/interner.rs353
-rw-r--r--crates/ra_hir_ty/src/traits/chalk/mapping.rs701
-rw-r--r--crates/ra_hir_ty/src/traits/chalk/tls.rs83
4 files changed, 1227 insertions, 809 deletions
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index 5870618a0..5b0f12a3c 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -1,301 +1,29 @@
1//! Conversion code from/to Chalk. 1//! Conversion code from/to Chalk.
2use std::{fmt, sync::Arc}; 2use std::sync::Arc;
3 3
4use log::debug; 4use log::debug;
5 5
6use chalk_ir::{ 6use chalk_ir::{fold::shift::Shift, GenericArg, TypeName};
7 cast::Cast, fold::shift::Shift, interner::HasInterner, Goal, GoalData, Parameter,
8 PlaceholderIndex, TypeName, UniverseIndex,
9};
10 7
11use hir_def::{AssocContainerId, AssocItemId, GenericDefId, HasModule, Lookup, TypeAliasId}; 8use hir_def::{
12use ra_db::{ 9 lang_item::{lang_attr, LangItemTarget},
13 salsa::{InternId, InternKey}, 10 AssocContainerId, AssocItemId, HasModule, Lookup, TypeAliasId,
14 CrateId,
15}; 11};
12use ra_db::{salsa::InternKey, CrateId};
16 13
17use super::{builtin, AssocTyValue, Canonical, ChalkContext, Impl, Obligation}; 14use super::{builtin, AssocTyValue, ChalkContext, Impl};
18use crate::{ 15use crate::{
19 db::HirDatabase, display::HirDisplay, method_resolution::TyFingerprint, utils::generics, 16 db::HirDatabase, display::HirDisplay, method_resolution::TyFingerprint, utils::generics,
20 ApplicationTy, DebruijnIndex, GenericPredicate, ProjectionTy, Substs, TraitRef, Ty, TypeCtor, 17 CallableDef, DebruijnIndex, GenericPredicate, Substs, Ty, TypeCtor,
21}; 18};
19use chalk_rust_ir::WellKnownTrait;
20use mapping::{convert_where_clauses, generic_predicate_to_inline_bound, make_binders};
22 21
23pub(super) mod tls; 22pub use self::interner::*;
24
25#[derive(Debug, Copy, Clone, Hash, PartialOrd, Ord, PartialEq, Eq)]
26pub struct Interner;
27
28impl chalk_ir::interner::Interner for Interner {
29 type InternedType = Box<chalk_ir::TyData<Self>>;
30 type InternedLifetime = chalk_ir::LifetimeData<Self>;
31 type InternedParameter = chalk_ir::ParameterData<Self>;
32 type InternedGoal = Arc<GoalData<Self>>;
33 type InternedGoals = Vec<Goal<Self>>;
34 type InternedSubstitution = Vec<Parameter<Self>>;
35 type InternedProgramClause = chalk_ir::ProgramClauseData<Self>;
36 type InternedProgramClauses = Arc<[chalk_ir::ProgramClause<Self>]>;
37 type InternedQuantifiedWhereClauses = Vec<chalk_ir::QuantifiedWhereClause<Self>>;
38 type InternedParameterKinds = Vec<chalk_ir::ParameterKind<()>>;
39 type InternedCanonicalVarKinds = Vec<chalk_ir::ParameterKind<UniverseIndex>>;
40 type Identifier = TypeAliasId;
41 type DefId = InternId;
42
43 fn debug_struct_id(
44 type_kind_id: StructId,
45 fmt: &mut fmt::Formatter<'_>,
46 ) -> Option<fmt::Result> {
47 tls::with_current_program(|prog| Some(prog?.debug_struct_id(type_kind_id, fmt)))
48 }
49
50 fn debug_trait_id(type_kind_id: TraitId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
51 tls::with_current_program(|prog| Some(prog?.debug_trait_id(type_kind_id, fmt)))
52 }
53
54 fn debug_assoc_type_id(id: AssocTypeId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
55 tls::with_current_program(|prog| Some(prog?.debug_assoc_type_id(id, fmt)))
56 }
57
58 fn debug_alias(
59 alias: &chalk_ir::AliasTy<Interner>,
60 fmt: &mut fmt::Formatter<'_>,
61 ) -> Option<fmt::Result> {
62 tls::with_current_program(|prog| Some(prog?.debug_alias(alias, fmt)))
63 }
64
65 fn debug_projection_ty(
66 proj: &chalk_ir::ProjectionTy<Interner>,
67 fmt: &mut fmt::Formatter<'_>,
68 ) -> Option<fmt::Result> {
69 tls::with_current_program(|prog| Some(prog?.debug_projection_ty(proj, fmt)))
70 }
71
72 fn debug_opaque_ty(
73 opaque_ty: &chalk_ir::OpaqueTy<Interner>,
74 fmt: &mut fmt::Formatter<'_>,
75 ) -> Option<fmt::Result> {
76 tls::with_current_program(|prog| Some(prog?.debug_opaque_ty(opaque_ty, fmt)))
77 }
78
79 fn debug_opaque_ty_id(
80 opaque_ty_id: chalk_ir::OpaqueTyId<Self>,
81 fmt: &mut fmt::Formatter<'_>,
82 ) -> Option<fmt::Result> {
83 tls::with_current_program(|prog| Some(prog?.debug_opaque_ty_id(opaque_ty_id, fmt)))
84 }
85
86 fn debug_ty(ty: &chalk_ir::Ty<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
87 tls::with_current_program(|prog| Some(prog?.debug_ty(ty, fmt)))
88 }
89
90 fn debug_lifetime(
91 lifetime: &chalk_ir::Lifetime<Interner>,
92 fmt: &mut fmt::Formatter<'_>,
93 ) -> Option<fmt::Result> {
94 tls::with_current_program(|prog| Some(prog?.debug_lifetime(lifetime, fmt)))
95 }
96
97 fn debug_parameter(
98 parameter: &Parameter<Interner>,
99 fmt: &mut fmt::Formatter<'_>,
100 ) -> Option<fmt::Result> {
101 tls::with_current_program(|prog| Some(prog?.debug_parameter(parameter, fmt)))
102 }
103
104 fn debug_goal(goal: &Goal<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
105 tls::with_current_program(|prog| Some(prog?.debug_goal(goal, fmt)))
106 }
107
108 fn debug_goals(
109 goals: &chalk_ir::Goals<Interner>,
110 fmt: &mut fmt::Formatter<'_>,
111 ) -> Option<fmt::Result> {
112 tls::with_current_program(|prog| Some(prog?.debug_goals(goals, fmt)))
113 }
114
115 fn debug_program_clause_implication(
116 pci: &chalk_ir::ProgramClauseImplication<Interner>,
117 fmt: &mut fmt::Formatter<'_>,
118 ) -> Option<fmt::Result> {
119 tls::with_current_program(|prog| Some(prog?.debug_program_clause_implication(pci, fmt)))
120 }
121
122 fn debug_application_ty(
123 application_ty: &chalk_ir::ApplicationTy<Interner>,
124 fmt: &mut fmt::Formatter<'_>,
125 ) -> Option<fmt::Result> {
126 tls::with_current_program(|prog| Some(prog?.debug_application_ty(application_ty, fmt)))
127 }
128
129 fn debug_substitution(
130 substitution: &chalk_ir::Substitution<Interner>,
131 fmt: &mut fmt::Formatter<'_>,
132 ) -> Option<fmt::Result> {
133 tls::with_current_program(|prog| Some(prog?.debug_substitution(substitution, fmt)))
134 }
135
136 fn debug_separator_trait_ref(
137 separator_trait_ref: &chalk_ir::SeparatorTraitRef<Interner>,
138 fmt: &mut fmt::Formatter<'_>,
139 ) -> Option<fmt::Result> {
140 tls::with_current_program(|prog| {
141 Some(prog?.debug_separator_trait_ref(separator_trait_ref, fmt))
142 })
143 }
144
145 fn intern_ty(&self, ty: chalk_ir::TyData<Self>) -> Box<chalk_ir::TyData<Self>> {
146 Box::new(ty)
147 }
148
149 fn ty_data<'a>(&self, ty: &'a Box<chalk_ir::TyData<Self>>) -> &'a chalk_ir::TyData<Self> {
150 ty
151 }
152
153 fn intern_lifetime(
154 &self,
155 lifetime: chalk_ir::LifetimeData<Self>,
156 ) -> chalk_ir::LifetimeData<Self> {
157 lifetime
158 }
159
160 fn lifetime_data<'a>(
161 &self,
162 lifetime: &'a chalk_ir::LifetimeData<Self>,
163 ) -> &'a chalk_ir::LifetimeData<Self> {
164 lifetime
165 }
166
167 fn intern_parameter(
168 &self,
169 parameter: chalk_ir::ParameterData<Self>,
170 ) -> chalk_ir::ParameterData<Self> {
171 parameter
172 }
173
174 fn parameter_data<'a>(
175 &self,
176 parameter: &'a chalk_ir::ParameterData<Self>,
177 ) -> &'a chalk_ir::ParameterData<Self> {
178 parameter
179 }
180
181 fn intern_goal(&self, goal: GoalData<Self>) -> Arc<GoalData<Self>> {
182 Arc::new(goal)
183 }
184
185 fn intern_goals<E>(
186 &self,
187 data: impl IntoIterator<Item = Result<Goal<Self>, E>>,
188 ) -> Result<Self::InternedGoals, E> {
189 data.into_iter().collect()
190 }
191
192 fn goal_data<'a>(&self, goal: &'a Arc<GoalData<Self>>) -> &'a GoalData<Self> {
193 goal
194 }
195
196 fn goals_data<'a>(&self, goals: &'a Vec<Goal<Interner>>) -> &'a [Goal<Interner>] {
197 goals
198 }
199
200 fn intern_substitution<E>(
201 &self,
202 data: impl IntoIterator<Item = Result<Parameter<Self>, E>>,
203 ) -> Result<Vec<Parameter<Self>>, E> {
204 data.into_iter().collect()
205 }
206
207 fn substitution_data<'a>(
208 &self,
209 substitution: &'a Vec<Parameter<Self>>,
210 ) -> &'a [Parameter<Self>] {
211 substitution
212 }
213
214 fn intern_program_clause(
215 &self,
216 data: chalk_ir::ProgramClauseData<Self>,
217 ) -> chalk_ir::ProgramClauseData<Self> {
218 data
219 }
220
221 fn program_clause_data<'a>(
222 &self,
223 clause: &'a chalk_ir::ProgramClauseData<Self>,
224 ) -> &'a chalk_ir::ProgramClauseData<Self> {
225 clause
226 }
227
228 fn intern_program_clauses<E>(
229 &self,
230 data: impl IntoIterator<Item = Result<chalk_ir::ProgramClause<Self>, E>>,
231 ) -> Result<Arc<[chalk_ir::ProgramClause<Self>]>, E> {
232 data.into_iter().collect()
233 }
234
235 fn program_clauses_data<'a>(
236 &self,
237 clauses: &'a Arc<[chalk_ir::ProgramClause<Self>]>,
238 ) -> &'a [chalk_ir::ProgramClause<Self>] {
239 &clauses
240 }
241
242 fn intern_quantified_where_clauses<E>(
243 &self,
244 data: impl IntoIterator<Item = Result<chalk_ir::QuantifiedWhereClause<Self>, E>>,
245 ) -> Result<Self::InternedQuantifiedWhereClauses, E> {
246 data.into_iter().collect()
247 }
248
249 fn quantified_where_clauses_data<'a>(
250 &self,
251 clauses: &'a Self::InternedQuantifiedWhereClauses,
252 ) -> &'a [chalk_ir::QuantifiedWhereClause<Self>] {
253 clauses
254 }
255
256 fn intern_parameter_kinds<E>(
257 &self,
258 data: impl IntoIterator<Item = Result<chalk_ir::ParameterKind<()>, E>>,
259 ) -> Result<Self::InternedParameterKinds, E> {
260 data.into_iter().collect()
261 }
262 23
263 fn parameter_kinds_data<'a>( 24pub(super) mod tls;
264 &self, 25mod interner;
265 parameter_kinds: &'a Self::InternedParameterKinds, 26mod mapping;
266 ) -> &'a [chalk_ir::ParameterKind<()>] {
267 &parameter_kinds
268 }
269
270 fn intern_canonical_var_kinds<E>(
271 &self,
272 data: impl IntoIterator<Item = Result<chalk_ir::ParameterKind<UniverseIndex>, E>>,
273 ) -> Result<Self::InternedCanonicalVarKinds, E> {
274 data.into_iter().collect()
275 }
276
277 fn canonical_var_kinds_data<'a>(
278 &self,
279 canonical_var_kinds: &'a Self::InternedCanonicalVarKinds,
280 ) -> &'a [chalk_ir::ParameterKind<UniverseIndex>] {
281 &canonical_var_kinds
282 }
283}
284
285impl chalk_ir::interner::HasInterner for Interner {
286 type Interner = Self;
287}
288
289pub type AssocTypeId = chalk_ir::AssocTypeId<Interner>;
290pub type AssociatedTyDatum = chalk_rust_ir::AssociatedTyDatum<Interner>;
291pub type TraitId = chalk_ir::TraitId<Interner>;
292pub type TraitDatum = chalk_rust_ir::TraitDatum<Interner>;
293pub type StructId = chalk_ir::StructId<Interner>;
294pub type StructDatum = chalk_rust_ir::StructDatum<Interner>;
295pub type ImplId = chalk_ir::ImplId<Interner>;
296pub type ImplDatum = chalk_rust_ir::ImplDatum<Interner>;
297pub type AssociatedTyValueId = chalk_rust_ir::AssociatedTyValueId<Interner>;
298pub type AssociatedTyValue = chalk_rust_ir::AssociatedTyValue<Interner>;
299 27
300pub(super) trait ToChalk { 28pub(super) trait ToChalk {
301 type Chalk; 29 type Chalk;
@@ -310,508 +38,6 @@ where
310 T::from_chalk(db, chalk) 38 T::from_chalk(db, chalk)
311} 39}
312 40
313impl ToChalk for Ty {
314 type Chalk = chalk_ir::Ty<Interner>;
315 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Ty<Interner> {
316 match self {
317 Ty::Apply(apply_ty) => {
318 let name = apply_ty.ctor.to_chalk(db);
319 let substitution = apply_ty.parameters.to_chalk(db);
320 chalk_ir::ApplicationTy { name, substitution }.cast(&Interner).intern(&Interner)
321 }
322 Ty::Projection(proj_ty) => {
323 let associated_ty_id = proj_ty.associated_ty.to_chalk(db);
324 let substitution = proj_ty.parameters.to_chalk(db);
325 chalk_ir::AliasTy::Projection(chalk_ir::ProjectionTy {
326 associated_ty_id,
327 substitution,
328 })
329 .cast(&Interner)
330 .intern(&Interner)
331 }
332 Ty::Placeholder(id) => {
333 let interned_id = db.intern_type_param_id(id);
334 PlaceholderIndex {
335 ui: UniverseIndex::ROOT,
336 idx: interned_id.as_intern_id().as_usize(),
337 }
338 .to_ty::<Interner>(&Interner)
339 }
340 Ty::Bound(idx) => chalk_ir::TyData::BoundVar(idx).intern(&Interner),
341 Ty::Infer(_infer_ty) => panic!("uncanonicalized infer ty"),
342 Ty::Dyn(predicates) => {
343 let where_clauses = chalk_ir::QuantifiedWhereClauses::from(
344 &Interner,
345 predicates.iter().filter(|p| !p.is_error()).cloned().map(|p| p.to_chalk(db)),
346 );
347 let bounded_ty = chalk_ir::DynTy { bounds: make_binders(where_clauses, 1) };
348 chalk_ir::TyData::Dyn(bounded_ty).intern(&Interner)
349 }
350 Ty::Opaque(_) | Ty::Unknown => {
351 let substitution = chalk_ir::Substitution::empty(&Interner);
352 let name = TypeName::Error;
353 chalk_ir::ApplicationTy { name, substitution }.cast(&Interner).intern(&Interner)
354 }
355 }
356 }
357 fn from_chalk(db: &dyn HirDatabase, chalk: chalk_ir::Ty<Interner>) -> Self {
358 match chalk.data(&Interner).clone() {
359 chalk_ir::TyData::Apply(apply_ty) => match apply_ty.name {
360 TypeName::Error => Ty::Unknown,
361 _ => {
362 let ctor = from_chalk(db, apply_ty.name);
363 let parameters = from_chalk(db, apply_ty.substitution);
364 Ty::Apply(ApplicationTy { ctor, parameters })
365 }
366 },
367 chalk_ir::TyData::Placeholder(idx) => {
368 assert_eq!(idx.ui, UniverseIndex::ROOT);
369 let interned_id = crate::db::GlobalTypeParamId::from_intern_id(
370 crate::salsa::InternId::from(idx.idx),
371 );
372 Ty::Placeholder(db.lookup_intern_type_param_id(interned_id))
373 }
374 chalk_ir::TyData::Alias(chalk_ir::AliasTy::Projection(proj)) => {
375 let associated_ty = from_chalk(db, proj.associated_ty_id);
376 let parameters = from_chalk(db, proj.substitution);
377 Ty::Projection(ProjectionTy { associated_ty, parameters })
378 }
379 chalk_ir::TyData::Alias(chalk_ir::AliasTy::Opaque(_)) => unimplemented!(),
380 chalk_ir::TyData::Function(_) => unimplemented!(),
381 chalk_ir::TyData::BoundVar(idx) => Ty::Bound(idx),
382 chalk_ir::TyData::InferenceVar(_iv) => Ty::Unknown,
383 chalk_ir::TyData::Dyn(where_clauses) => {
384 assert_eq!(where_clauses.bounds.binders.len(&Interner), 1);
385 let predicates = where_clauses
386 .bounds
387 .skip_binders()
388 .iter(&Interner)
389 .map(|c| from_chalk(db, c.clone()))
390 .collect();
391 Ty::Dyn(predicates)
392 }
393 }
394 }
395}
396
397impl ToChalk for Substs {
398 type Chalk = chalk_ir::Substitution<Interner>;
399
400 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Substitution<Interner> {
401 chalk_ir::Substitution::from(&Interner, self.iter().map(|ty| ty.clone().to_chalk(db)))
402 }
403
404 fn from_chalk(db: &dyn HirDatabase, parameters: chalk_ir::Substitution<Interner>) -> Substs {
405 let tys = parameters
406 .iter(&Interner)
407 .map(|p| match p.ty(&Interner) {
408 Some(ty) => from_chalk(db, ty.clone()),
409 None => unimplemented!(),
410 })
411 .collect();
412 Substs(tys)
413 }
414}
415
416impl ToChalk for TraitRef {
417 type Chalk = chalk_ir::TraitRef<Interner>;
418
419 fn to_chalk(self: TraitRef, db: &dyn HirDatabase) -> chalk_ir::TraitRef<Interner> {
420 let trait_id = self.trait_.to_chalk(db);
421 let substitution = self.substs.to_chalk(db);
422 chalk_ir::TraitRef { trait_id, substitution }
423 }
424
425 fn from_chalk(db: &dyn HirDatabase, trait_ref: chalk_ir::TraitRef<Interner>) -> Self {
426 let trait_ = from_chalk(db, trait_ref.trait_id);
427 let substs = from_chalk(db, trait_ref.substitution);
428 TraitRef { trait_, substs }
429 }
430}
431
432impl ToChalk for hir_def::TraitId {
433 type Chalk = TraitId;
434
435 fn to_chalk(self, _db: &dyn HirDatabase) -> TraitId {
436 chalk_ir::TraitId(self.as_intern_id())
437 }
438
439 fn from_chalk(_db: &dyn HirDatabase, trait_id: TraitId) -> hir_def::TraitId {
440 InternKey::from_intern_id(trait_id.0)
441 }
442}
443
444impl ToChalk for TypeCtor {
445 type Chalk = TypeName<Interner>;
446
447 fn to_chalk(self, db: &dyn HirDatabase) -> TypeName<Interner> {
448 match self {
449 TypeCtor::AssociatedType(type_alias) => {
450 let type_id = type_alias.to_chalk(db);
451 TypeName::AssociatedType(type_id)
452 }
453 _ => {
454 // other TypeCtors get interned and turned into a chalk StructId
455 let struct_id = db.intern_type_ctor(self).into();
456 TypeName::Struct(struct_id)
457 }
458 }
459 }
460
461 fn from_chalk(db: &dyn HirDatabase, type_name: TypeName<Interner>) -> TypeCtor {
462 match type_name {
463 TypeName::Struct(struct_id) => db.lookup_intern_type_ctor(struct_id.into()),
464 TypeName::AssociatedType(type_id) => TypeCtor::AssociatedType(from_chalk(db, type_id)),
465 TypeName::OpaqueType(_) => unreachable!(),
466
467 TypeName::Scalar(_) => unreachable!(),
468 TypeName::Tuple(_) => unreachable!(),
469 TypeName::Raw(_) => unreachable!(),
470 TypeName::Slice => unreachable!(),
471 TypeName::Ref(_) => unreachable!(),
472 TypeName::Str => unreachable!(),
473
474 TypeName::Error => {
475 // this should not be reached, since we don't represent TypeName::Error with TypeCtor
476 unreachable!()
477 }
478 }
479 }
480}
481
482impl ToChalk for Impl {
483 type Chalk = ImplId;
484
485 fn to_chalk(self, db: &dyn HirDatabase) -> ImplId {
486 db.intern_chalk_impl(self).into()
487 }
488
489 fn from_chalk(db: &dyn HirDatabase, impl_id: ImplId) -> Impl {
490 db.lookup_intern_chalk_impl(impl_id.into())
491 }
492}
493
494impl ToChalk for TypeAliasId {
495 type Chalk = AssocTypeId;
496
497 fn to_chalk(self, _db: &dyn HirDatabase) -> AssocTypeId {
498 chalk_ir::AssocTypeId(self.as_intern_id())
499 }
500
501 fn from_chalk(_db: &dyn HirDatabase, type_alias_id: AssocTypeId) -> TypeAliasId {
502 InternKey::from_intern_id(type_alias_id.0)
503 }
504}
505
506impl ToChalk for AssocTyValue {
507 type Chalk = AssociatedTyValueId;
508
509 fn to_chalk(self, db: &dyn HirDatabase) -> AssociatedTyValueId {
510 db.intern_assoc_ty_value(self).into()
511 }
512
513 fn from_chalk(db: &dyn HirDatabase, assoc_ty_value_id: AssociatedTyValueId) -> AssocTyValue {
514 db.lookup_intern_assoc_ty_value(assoc_ty_value_id.into())
515 }
516}
517
518impl ToChalk for GenericPredicate {
519 type Chalk = chalk_ir::QuantifiedWhereClause<Interner>;
520
521 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::QuantifiedWhereClause<Interner> {
522 match self {
523 GenericPredicate::Implemented(trait_ref) => {
524 let chalk_trait_ref = trait_ref.to_chalk(db);
525 let chalk_trait_ref = chalk_trait_ref.shifted_in(&Interner);
526 make_binders(chalk_ir::WhereClause::Implemented(chalk_trait_ref), 0)
527 }
528 GenericPredicate::Projection(projection_pred) => {
529 let ty = projection_pred.ty.to_chalk(db).shifted_in(&Interner);
530 let projection = projection_pred.projection_ty.to_chalk(db).shifted_in(&Interner);
531 let alias = chalk_ir::AliasTy::Projection(projection);
532 make_binders(chalk_ir::WhereClause::AliasEq(chalk_ir::AliasEq { alias, ty }), 0)
533 }
534 GenericPredicate::Error => panic!("tried passing GenericPredicate::Error to Chalk"),
535 }
536 }
537
538 fn from_chalk(
539 db: &dyn HirDatabase,
540 where_clause: chalk_ir::QuantifiedWhereClause<Interner>,
541 ) -> GenericPredicate {
542 // we don't produce any where clauses with binders and can't currently deal with them
543 match where_clause
544 .skip_binders()
545 .shifted_out(&Interner)
546 .expect("unexpected bound vars in where clause")
547 {
548 chalk_ir::WhereClause::Implemented(tr) => {
549 GenericPredicate::Implemented(from_chalk(db, tr))
550 }
551 chalk_ir::WhereClause::AliasEq(projection_eq) => {
552 let projection_ty = from_chalk(
553 db,
554 match projection_eq.alias {
555 chalk_ir::AliasTy::Projection(p) => p,
556 _ => unimplemented!(),
557 },
558 );
559 let ty = from_chalk(db, projection_eq.ty);
560 GenericPredicate::Projection(super::ProjectionPredicate { projection_ty, ty })
561 }
562 }
563 }
564}
565
566impl ToChalk for ProjectionTy {
567 type Chalk = chalk_ir::ProjectionTy<Interner>;
568
569 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::ProjectionTy<Interner> {
570 chalk_ir::ProjectionTy {
571 associated_ty_id: self.associated_ty.to_chalk(db),
572 substitution: self.parameters.to_chalk(db),
573 }
574 }
575
576 fn from_chalk(
577 db: &dyn HirDatabase,
578 projection_ty: chalk_ir::ProjectionTy<Interner>,
579 ) -> ProjectionTy {
580 ProjectionTy {
581 associated_ty: from_chalk(db, projection_ty.associated_ty_id),
582 parameters: from_chalk(db, projection_ty.substitution),
583 }
584 }
585}
586
587impl ToChalk for super::ProjectionPredicate {
588 type Chalk = chalk_ir::AliasEq<Interner>;
589
590 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::AliasEq<Interner> {
591 chalk_ir::AliasEq {
592 alias: chalk_ir::AliasTy::Projection(self.projection_ty.to_chalk(db)),
593 ty: self.ty.to_chalk(db),
594 }
595 }
596
597 fn from_chalk(_db: &dyn HirDatabase, _normalize: chalk_ir::AliasEq<Interner>) -> Self {
598 unimplemented!()
599 }
600}
601
602impl ToChalk for Obligation {
603 type Chalk = chalk_ir::DomainGoal<Interner>;
604
605 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::DomainGoal<Interner> {
606 match self {
607 Obligation::Trait(tr) => tr.to_chalk(db).cast(&Interner),
608 Obligation::Projection(pr) => pr.to_chalk(db).cast(&Interner),
609 }
610 }
611
612 fn from_chalk(_db: &dyn HirDatabase, _goal: chalk_ir::DomainGoal<Interner>) -> Self {
613 unimplemented!()
614 }
615}
616
617impl<T> ToChalk for Canonical<T>
618where
619 T: ToChalk,
620 T::Chalk: HasInterner<Interner = Interner>,
621{
622 type Chalk = chalk_ir::Canonical<T::Chalk>;
623
624 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Canonical<T::Chalk> {
625 let parameter = chalk_ir::ParameterKind::Ty(chalk_ir::UniverseIndex::ROOT);
626 let value = self.value.to_chalk(db);
627 chalk_ir::Canonical {
628 value,
629 binders: chalk_ir::CanonicalVarKinds::from(&Interner, vec![parameter; self.num_vars]),
630 }
631 }
632
633 fn from_chalk(db: &dyn HirDatabase, canonical: chalk_ir::Canonical<T::Chalk>) -> Canonical<T> {
634 Canonical {
635 num_vars: canonical.binders.len(&Interner),
636 value: from_chalk(db, canonical.value),
637 }
638 }
639}
640
641impl ToChalk for Arc<super::TraitEnvironment> {
642 type Chalk = chalk_ir::Environment<Interner>;
643
644 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Environment<Interner> {
645 let mut clauses = Vec::new();
646 for pred in &self.predicates {
647 if pred.is_error() {
648 // for env, we just ignore errors
649 continue;
650 }
651 let program_clause: chalk_ir::ProgramClause<Interner> =
652 pred.clone().to_chalk(db).cast(&Interner);
653 clauses.push(program_clause.into_from_env_clause(&Interner));
654 }
655 chalk_ir::Environment::new(&Interner).add_clauses(&Interner, clauses)
656 }
657
658 fn from_chalk(
659 _db: &dyn HirDatabase,
660 _env: chalk_ir::Environment<Interner>,
661 ) -> Arc<super::TraitEnvironment> {
662 unimplemented!()
663 }
664}
665
666impl<T: ToChalk> ToChalk for super::InEnvironment<T>
667where
668 T::Chalk: chalk_ir::interner::HasInterner<Interner = Interner>,
669{
670 type Chalk = chalk_ir::InEnvironment<T::Chalk>;
671
672 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::InEnvironment<T::Chalk> {
673 chalk_ir::InEnvironment {
674 environment: self.environment.to_chalk(db),
675 goal: self.value.to_chalk(db),
676 }
677 }
678
679 fn from_chalk(
680 db: &dyn HirDatabase,
681 in_env: chalk_ir::InEnvironment<T::Chalk>,
682 ) -> super::InEnvironment<T> {
683 super::InEnvironment {
684 environment: from_chalk(db, in_env.environment),
685 value: from_chalk(db, in_env.goal),
686 }
687 }
688}
689
690impl ToChalk for builtin::BuiltinImplData {
691 type Chalk = ImplDatum;
692
693 fn to_chalk(self, db: &dyn HirDatabase) -> ImplDatum {
694 let impl_type = chalk_rust_ir::ImplType::External;
695 let where_clauses = self.where_clauses.into_iter().map(|w| w.to_chalk(db)).collect();
696
697 let impl_datum_bound =
698 chalk_rust_ir::ImplDatumBound { trait_ref: self.trait_ref.to_chalk(db), where_clauses };
699 let associated_ty_value_ids =
700 self.assoc_ty_values.into_iter().map(|v| v.to_chalk(db)).collect();
701 chalk_rust_ir::ImplDatum {
702 binders: make_binders(impl_datum_bound, self.num_vars),
703 impl_type,
704 polarity: chalk_rust_ir::Polarity::Positive,
705 associated_ty_value_ids,
706 }
707 }
708
709 fn from_chalk(_db: &dyn HirDatabase, _data: ImplDatum) -> Self {
710 unimplemented!()
711 }
712}
713
714impl ToChalk for builtin::BuiltinImplAssocTyValueData {
715 type Chalk = AssociatedTyValue;
716
717 fn to_chalk(self, db: &dyn HirDatabase) -> AssociatedTyValue {
718 let ty = self.value.to_chalk(db);
719 let value_bound = chalk_rust_ir::AssociatedTyValueBound { ty };
720
721 chalk_rust_ir::AssociatedTyValue {
722 associated_ty_id: self.assoc_ty_id.to_chalk(db),
723 impl_id: self.impl_.to_chalk(db),
724 value: make_binders(value_bound, self.num_vars),
725 }
726 }
727
728 fn from_chalk(
729 _db: &dyn HirDatabase,
730 _data: AssociatedTyValue,
731 ) -> builtin::BuiltinImplAssocTyValueData {
732 unimplemented!()
733 }
734}
735
736fn make_binders<T>(value: T, num_vars: usize) -> chalk_ir::Binders<T>
737where
738 T: HasInterner<Interner = Interner>,
739{
740 chalk_ir::Binders::new(
741 chalk_ir::ParameterKinds::from(
742 &Interner,
743 std::iter::repeat(chalk_ir::ParameterKind::Ty(())).take(num_vars),
744 ),
745 value,
746 )
747}
748
749fn convert_where_clauses(
750 db: &dyn HirDatabase,
751 def: GenericDefId,
752 substs: &Substs,
753) -> Vec<chalk_ir::QuantifiedWhereClause<Interner>> {
754 let generic_predicates = db.generic_predicates(def);
755 let mut result = Vec::with_capacity(generic_predicates.len());
756 for pred in generic_predicates.iter() {
757 if pred.value.is_error() {
758 // skip errored predicates completely
759 continue;
760 }
761 result.push(pred.clone().subst(substs).to_chalk(db));
762 }
763 result
764}
765
766fn generic_predicate_to_inline_bound(
767 db: &dyn HirDatabase,
768 pred: &GenericPredicate,
769 self_ty: &Ty,
770) -> Option<chalk_rust_ir::InlineBound<Interner>> {
771 // An InlineBound is like a GenericPredicate, except the self type is left out.
772 // We don't have a special type for this, but Chalk does.
773 match pred {
774 GenericPredicate::Implemented(trait_ref) => {
775 if &trait_ref.substs[0] != self_ty {
776 // we can only convert predicates back to type bounds if they
777 // have the expected self type
778 return None;
779 }
780 let args_no_self = trait_ref.substs[1..]
781 .iter()
782 .map(|ty| ty.clone().to_chalk(db).cast(&Interner))
783 .collect();
784 let trait_bound =
785 chalk_rust_ir::TraitBound { trait_id: trait_ref.trait_.to_chalk(db), args_no_self };
786 Some(chalk_rust_ir::InlineBound::TraitBound(trait_bound))
787 }
788 GenericPredicate::Projection(proj) => {
789 if &proj.projection_ty.parameters[0] != self_ty {
790 return None;
791 }
792 let trait_ = match proj.projection_ty.associated_ty.lookup(db.upcast()).container {
793 AssocContainerId::TraitId(t) => t,
794 _ => panic!("associated type not in trait"),
795 };
796 let args_no_self = proj.projection_ty.parameters[1..]
797 .iter()
798 .map(|ty| ty.clone().to_chalk(db).cast(&Interner))
799 .collect();
800 let alias_eq_bound = chalk_rust_ir::AliasEqBound {
801 value: proj.ty.clone().to_chalk(db),
802 trait_bound: chalk_rust_ir::TraitBound {
803 trait_id: trait_.to_chalk(db),
804 args_no_self,
805 },
806 associated_ty_id: proj.projection_ty.associated_ty.to_chalk(db),
807 parameters: Vec::new(), // FIXME we don't support generic associated types yet
808 };
809 Some(chalk_rust_ir::InlineBound::AliasEqBound(alias_eq_bound))
810 }
811 GenericPredicate::Error => None,
812 }
813}
814
815impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> { 41impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
816 fn associated_ty_data(&self, id: AssocTypeId) -> Arc<AssociatedTyDatum> { 42 fn associated_ty_data(&self, id: AssocTypeId) -> Arc<AssociatedTyDatum> {
817 self.db.associated_ty_data(id) 43 self.db.associated_ty_data(id)
@@ -819,16 +45,24 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
819 fn trait_datum(&self, trait_id: TraitId) -> Arc<TraitDatum> { 45 fn trait_datum(&self, trait_id: TraitId) -> Arc<TraitDatum> {
820 self.db.trait_datum(self.krate, trait_id) 46 self.db.trait_datum(self.krate, trait_id)
821 } 47 }
822 fn struct_datum(&self, struct_id: StructId) -> Arc<StructDatum> { 48 fn adt_datum(&self, struct_id: AdtId) -> Arc<StructDatum> {
823 self.db.struct_datum(self.krate, struct_id) 49 self.db.struct_datum(self.krate, struct_id)
824 } 50 }
825 fn impl_datum(&self, impl_id: ImplId) -> Arc<ImplDatum> { 51 fn impl_datum(&self, impl_id: ImplId) -> Arc<ImplDatum> {
826 self.db.impl_datum(self.krate, impl_id) 52 self.db.impl_datum(self.krate, impl_id)
827 } 53 }
54
55 fn fn_def_datum(
56 &self,
57 fn_def_id: chalk_ir::FnDefId<Interner>,
58 ) -> Arc<chalk_rust_ir::FnDefDatum<Interner>> {
59 self.db.fn_def_datum(self.krate, fn_def_id)
60 }
61
828 fn impls_for_trait( 62 fn impls_for_trait(
829 &self, 63 &self,
830 trait_id: TraitId, 64 trait_id: TraitId,
831 parameters: &[Parameter<Interner>], 65 parameters: &[GenericArg<Interner>],
832 ) -> Vec<ImplId> { 66 ) -> Vec<ImplId> {
833 debug!("impls_for_trait {:?}", trait_id); 67 debug!("impls_for_trait {:?}", trait_id);
834 let trait_: hir_def::TraitId = from_chalk(self.db, trait_id); 68 let trait_: hir_def::TraitId = from_chalk(self.db, trait_id);
@@ -859,7 +93,7 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
859 debug!("impls_for_trait returned {} impls", result.len()); 93 debug!("impls_for_trait returned {} impls", result.len());
860 result 94 result
861 } 95 }
862 fn impl_provided_for(&self, auto_trait_id: TraitId, struct_id: StructId) -> bool { 96 fn impl_provided_for(&self, auto_trait_id: TraitId, struct_id: AdtId) -> bool {
863 debug!("impl_provided_for {:?}, {:?}", auto_trait_id, struct_id); 97 debug!("impl_provided_for {:?}, {:?}", auto_trait_id, struct_id);
864 false // FIXME 98 false // FIXME
865 } 99 }
@@ -878,10 +112,15 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
878 } 112 }
879 fn well_known_trait_id( 113 fn well_known_trait_id(
880 &self, 114 &self,
881 _well_known_trait: chalk_rust_ir::WellKnownTrait, 115 well_known_trait: chalk_rust_ir::WellKnownTrait,
882 ) -> Option<chalk_ir::TraitId<Interner>> { 116 ) -> Option<chalk_ir::TraitId<Interner>> {
883 // FIXME tell Chalk about well-known traits (here and in trait_datum) 117 let lang_attr = lang_attr_from_well_known_trait(well_known_trait);
884 None 118 let lang_items = self.db.crate_lang_items(self.krate);
119 let trait_ = match lang_items.target(lang_attr) {
120 Some(LangItemTarget::TraitId(trait_)) => trait_,
121 _ => return None,
122 };
123 Some(trait_.to_chalk(self.db))
885 } 124 }
886 125
887 fn program_clauses_for_env( 126 fn program_clauses_for_env(
@@ -983,7 +222,8 @@ pub(crate) fn trait_datum_query(
983 let associated_ty_ids = 222 let associated_ty_ids =
984 trait_data.associated_types().map(|type_alias| type_alias.to_chalk(db)).collect(); 223 trait_data.associated_types().map(|type_alias| type_alias.to_chalk(db)).collect();
985 let trait_datum_bound = chalk_rust_ir::TraitDatumBound { where_clauses }; 224 let trait_datum_bound = chalk_rust_ir::TraitDatumBound { where_clauses };
986 let well_known = None; // FIXME set this (depending on lang items) 225 let well_known =
226 lang_attr(db.upcast(), trait_).and_then(|name| well_known_trait_from_lang_attr(&name));
987 let trait_datum = TraitDatum { 227 let trait_datum = TraitDatum {
988 id: trait_id, 228 id: trait_id,
989 binders: make_binders(trait_datum_bound, bound_vars.len()), 229 binders: make_binders(trait_datum_bound, bound_vars.len()),
@@ -994,13 +234,32 @@ pub(crate) fn trait_datum_query(
994 Arc::new(trait_datum) 234 Arc::new(trait_datum)
995} 235}
996 236
237fn well_known_trait_from_lang_attr(name: &str) -> Option<WellKnownTrait> {
238 Some(match name {
239 "sized" => WellKnownTrait::SizedTrait,
240 "copy" => WellKnownTrait::CopyTrait,
241 "clone" => WellKnownTrait::CloneTrait,
242 "drop" => WellKnownTrait::DropTrait,
243 _ => return None,
244 })
245}
246
247fn lang_attr_from_well_known_trait(attr: WellKnownTrait) -> &'static str {
248 match attr {
249 WellKnownTrait::SizedTrait => "sized",
250 WellKnownTrait::CopyTrait => "copy",
251 WellKnownTrait::CloneTrait => "clone",
252 WellKnownTrait::DropTrait => "drop",
253 }
254}
255
997pub(crate) fn struct_datum_query( 256pub(crate) fn struct_datum_query(
998 db: &dyn HirDatabase, 257 db: &dyn HirDatabase,
999 krate: CrateId, 258 krate: CrateId,
1000 struct_id: StructId, 259 struct_id: AdtId,
1001) -> Arc<StructDatum> { 260) -> Arc<StructDatum> {
1002 debug!("struct_datum {:?}", struct_id); 261 debug!("struct_datum {:?}", struct_id);
1003 let type_ctor: TypeCtor = from_chalk(db, TypeName::Struct(struct_id)); 262 let type_ctor: TypeCtor = from_chalk(db, TypeName::Adt(struct_id));
1004 debug!("struct {:?} = {:?}", struct_id, type_ctor); 263 debug!("struct {:?} = {:?}", struct_id, type_ctor);
1005 let num_params = type_ctor.num_ty_params(db); 264 let num_params = type_ctor.num_ty_params(db);
1006 let upstream = type_ctor.krate(db) != Some(krate); 265 let upstream = type_ctor.krate(db) != Some(krate);
@@ -1012,12 +271,12 @@ pub(crate) fn struct_datum_query(
1012 convert_where_clauses(db, generic_def, &bound_vars) 271 convert_where_clauses(db, generic_def, &bound_vars)
1013 }) 272 })
1014 .unwrap_or_else(Vec::new); 273 .unwrap_or_else(Vec::new);
1015 let flags = chalk_rust_ir::StructFlags { 274 let flags = chalk_rust_ir::AdtFlags {
1016 upstream, 275 upstream,
1017 // FIXME set fundamental flag correctly 276 // FIXME set fundamental flag correctly
1018 fundamental: false, 277 fundamental: false,
1019 }; 278 };
1020 let struct_datum_bound = chalk_rust_ir::StructDatumBound { 279 let struct_datum_bound = chalk_rust_ir::AdtDatumBound {
1021 fields: Vec::new(), // FIXME add fields (only relevant for auto traits) 280 fields: Vec::new(), // FIXME add fields (only relevant for auto traits)
1022 where_clauses, 281 where_clauses,
1023 }; 282 };
@@ -1145,15 +404,47 @@ fn type_alias_associated_ty_value(
1145 Arc::new(value) 404 Arc::new(value)
1146} 405}
1147 406
1148impl From<StructId> for crate::TypeCtorId { 407pub(crate) fn fn_def_datum_query(
1149 fn from(struct_id: StructId) -> Self { 408 db: &dyn HirDatabase,
1150 InternKey::from_intern_id(struct_id.0) 409 _krate: CrateId,
410 fn_def_id: FnDefId,
411) -> Arc<FnDefDatum> {
412 let callable_def: CallableDef = from_chalk(db, fn_def_id);
413 let generic_params = generics(db.upcast(), callable_def.into());
414 let sig = db.callable_item_signature(callable_def);
415 let bound_vars = Substs::bound_vars(&generic_params, DebruijnIndex::INNERMOST);
416 let where_clauses = convert_where_clauses(db, callable_def.into(), &bound_vars);
417 let bound = chalk_rust_ir::FnDefDatumBound {
418 // Note: Chalk doesn't actually use this information yet as far as I am aware, but we provide it anyway
419 argument_types: sig.value.params().iter().map(|ty| ty.clone().to_chalk(db)).collect(),
420 return_type: sig.value.ret().clone().to_chalk(db),
421 where_clauses,
422 };
423 let datum = FnDefDatum { id: fn_def_id, binders: make_binders(bound, sig.num_binders) };
424 Arc::new(datum)
425}
426
427impl From<AdtId> for crate::TypeCtorId {
428 fn from(struct_id: AdtId) -> Self {
429 struct_id.0
1151 } 430 }
1152} 431}
1153 432
1154impl From<crate::TypeCtorId> for StructId { 433impl From<crate::TypeCtorId> for AdtId {
1155 fn from(type_ctor_id: crate::TypeCtorId) -> Self { 434 fn from(type_ctor_id: crate::TypeCtorId) -> Self {
1156 chalk_ir::StructId(type_ctor_id.as_intern_id()) 435 chalk_ir::AdtId(type_ctor_id)
436 }
437}
438
439impl From<FnDefId> for crate::CallableDefId {
440 fn from(fn_def_id: FnDefId) -> Self {
441 InternKey::from_intern_id(fn_def_id.0)
442 }
443}
444
445impl From<crate::CallableDefId> for FnDefId {
446 fn from(callable_def_id: crate::CallableDefId) -> Self {
447 chalk_ir::FnDefId(callable_def_id.as_intern_id())
1157 } 448 }
1158} 449}
1159 450
diff --git a/crates/ra_hir_ty/src/traits/chalk/interner.rs b/crates/ra_hir_ty/src/traits/chalk/interner.rs
new file mode 100644
index 000000000..2a27f8ed8
--- /dev/null
+++ b/crates/ra_hir_ty/src/traits/chalk/interner.rs
@@ -0,0 +1,353 @@
1//! Implementation of the Chalk `Interner` trait, which allows customizing the
2//! representation of the various objects Chalk deals with (types, goals etc.).
3
4use super::tls;
5use chalk_ir::{GenericArg, Goal, GoalData};
6use hir_def::TypeAliasId;
7use ra_db::salsa::InternId;
8use std::{fmt, sync::Arc};
9
10#[derive(Debug, Copy, Clone, Hash, PartialOrd, Ord, PartialEq, Eq)]
11pub struct Interner;
12
13pub type AssocTypeId = chalk_ir::AssocTypeId<Interner>;
14pub type AssociatedTyDatum = chalk_rust_ir::AssociatedTyDatum<Interner>;
15pub type TraitId = chalk_ir::TraitId<Interner>;
16pub type TraitDatum = chalk_rust_ir::TraitDatum<Interner>;
17pub type AdtId = chalk_ir::AdtId<Interner>;
18pub type StructDatum = chalk_rust_ir::AdtDatum<Interner>;
19pub type ImplId = chalk_ir::ImplId<Interner>;
20pub type ImplDatum = chalk_rust_ir::ImplDatum<Interner>;
21pub type AssociatedTyValueId = chalk_rust_ir::AssociatedTyValueId<Interner>;
22pub type AssociatedTyValue = chalk_rust_ir::AssociatedTyValue<Interner>;
23pub type FnDefId = chalk_ir::FnDefId<Interner>;
24pub type FnDefDatum = chalk_rust_ir::FnDefDatum<Interner>;
25
26impl chalk_ir::interner::Interner for Interner {
27 type InternedType = Box<chalk_ir::TyData<Self>>; // FIXME use Arc?
28 type InternedLifetime = chalk_ir::LifetimeData<Self>;
29 type InternedConst = Arc<chalk_ir::ConstData<Self>>;
30 type InternedConcreteConst = ();
31 type InternedGenericArg = chalk_ir::GenericArgData<Self>;
32 type InternedGoal = Arc<GoalData<Self>>;
33 type InternedGoals = Vec<Goal<Self>>;
34 type InternedSubstitution = Vec<GenericArg<Self>>;
35 type InternedProgramClause = chalk_ir::ProgramClauseData<Self>;
36 type InternedProgramClauses = Arc<[chalk_ir::ProgramClause<Self>]>;
37 type InternedQuantifiedWhereClauses = Vec<chalk_ir::QuantifiedWhereClause<Self>>;
38 type InternedVariableKinds = Vec<chalk_ir::VariableKind<Self>>;
39 type InternedCanonicalVarKinds = Vec<chalk_ir::CanonicalVarKind<Self>>;
40 type DefId = InternId;
41 type InternedAdtId = crate::TypeCtorId;
42 type Identifier = TypeAliasId;
43
44 fn debug_adt_id(type_kind_id: AdtId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
45 tls::with_current_program(|prog| Some(prog?.debug_struct_id(type_kind_id, fmt)))
46 }
47
48 fn debug_trait_id(type_kind_id: TraitId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
49 tls::with_current_program(|prog| Some(prog?.debug_trait_id(type_kind_id, fmt)))
50 }
51
52 fn debug_assoc_type_id(id: AssocTypeId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
53 tls::with_current_program(|prog| Some(prog?.debug_assoc_type_id(id, fmt)))
54 }
55
56 fn debug_alias(
57 alias: &chalk_ir::AliasTy<Interner>,
58 fmt: &mut fmt::Formatter<'_>,
59 ) -> Option<fmt::Result> {
60 tls::with_current_program(|prog| Some(prog?.debug_alias(alias, fmt)))
61 }
62
63 fn debug_projection_ty(
64 proj: &chalk_ir::ProjectionTy<Interner>,
65 fmt: &mut fmt::Formatter<'_>,
66 ) -> Option<fmt::Result> {
67 tls::with_current_program(|prog| Some(prog?.debug_projection_ty(proj, fmt)))
68 }
69
70 fn debug_opaque_ty(
71 opaque_ty: &chalk_ir::OpaqueTy<Interner>,
72 fmt: &mut fmt::Formatter<'_>,
73 ) -> Option<fmt::Result> {
74 tls::with_current_program(|prog| Some(prog?.debug_opaque_ty(opaque_ty, fmt)))
75 }
76
77 fn debug_opaque_ty_id(
78 opaque_ty_id: chalk_ir::OpaqueTyId<Self>,
79 fmt: &mut fmt::Formatter<'_>,
80 ) -> Option<fmt::Result> {
81 tls::with_current_program(|prog| Some(prog?.debug_opaque_ty_id(opaque_ty_id, fmt)))
82 }
83
84 fn debug_ty(ty: &chalk_ir::Ty<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
85 tls::with_current_program(|prog| Some(prog?.debug_ty(ty, fmt)))
86 }
87
88 fn debug_lifetime(
89 lifetime: &chalk_ir::Lifetime<Interner>,
90 fmt: &mut fmt::Formatter<'_>,
91 ) -> Option<fmt::Result> {
92 tls::with_current_program(|prog| Some(prog?.debug_lifetime(lifetime, fmt)))
93 }
94
95 fn debug_generic_arg(
96 parameter: &GenericArg<Interner>,
97 fmt: &mut fmt::Formatter<'_>,
98 ) -> Option<fmt::Result> {
99 tls::with_current_program(|prog| Some(prog?.debug_generic_arg(parameter, fmt)))
100 }
101
102 fn debug_goal(goal: &Goal<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
103 tls::with_current_program(|prog| Some(prog?.debug_goal(goal, fmt)))
104 }
105
106 fn debug_goals(
107 goals: &chalk_ir::Goals<Interner>,
108 fmt: &mut fmt::Formatter<'_>,
109 ) -> Option<fmt::Result> {
110 tls::with_current_program(|prog| Some(prog?.debug_goals(goals, fmt)))
111 }
112
113 fn debug_program_clause_implication(
114 pci: &chalk_ir::ProgramClauseImplication<Interner>,
115 fmt: &mut fmt::Formatter<'_>,
116 ) -> Option<fmt::Result> {
117 tls::with_current_program(|prog| Some(prog?.debug_program_clause_implication(pci, fmt)))
118 }
119
120 fn debug_application_ty(
121 application_ty: &chalk_ir::ApplicationTy<Interner>,
122 fmt: &mut fmt::Formatter<'_>,
123 ) -> Option<fmt::Result> {
124 tls::with_current_program(|prog| Some(prog?.debug_application_ty(application_ty, fmt)))
125 }
126
127 fn debug_substitution(
128 substitution: &chalk_ir::Substitution<Interner>,
129 fmt: &mut fmt::Formatter<'_>,
130 ) -> Option<fmt::Result> {
131 tls::with_current_program(|prog| Some(prog?.debug_substitution(substitution, fmt)))
132 }
133
134 fn debug_separator_trait_ref(
135 separator_trait_ref: &chalk_ir::SeparatorTraitRef<Interner>,
136 fmt: &mut fmt::Formatter<'_>,
137 ) -> Option<fmt::Result> {
138 tls::with_current_program(|prog| {
139 Some(prog?.debug_separator_trait_ref(separator_trait_ref, fmt))
140 })
141 }
142
143 fn debug_fn_def_id(
144 fn_def_id: chalk_ir::FnDefId<Self>,
145 fmt: &mut fmt::Formatter<'_>,
146 ) -> Option<fmt::Result> {
147 tls::with_current_program(|prog| Some(prog?.debug_fn_def_id(fn_def_id, fmt)))
148 }
149 fn debug_const(
150 constant: &chalk_ir::Const<Self>,
151 fmt: &mut fmt::Formatter<'_>,
152 ) -> Option<fmt::Result> {
153 tls::with_current_program(|prog| Some(prog?.debug_const(constant, fmt)))
154 }
155 fn debug_variable_kinds(
156 variable_kinds: &chalk_ir::VariableKinds<Self>,
157 fmt: &mut fmt::Formatter<'_>,
158 ) -> Option<fmt::Result> {
159 tls::with_current_program(|prog| Some(prog?.debug_variable_kinds(variable_kinds, fmt)))
160 }
161 fn debug_variable_kinds_with_angles(
162 variable_kinds: &chalk_ir::VariableKinds<Self>,
163 fmt: &mut fmt::Formatter<'_>,
164 ) -> Option<fmt::Result> {
165 tls::with_current_program(|prog| {
166 Some(prog?.debug_variable_kinds_with_angles(variable_kinds, fmt))
167 })
168 }
169 fn debug_canonical_var_kinds(
170 canonical_var_kinds: &chalk_ir::CanonicalVarKinds<Self>,
171 fmt: &mut fmt::Formatter<'_>,
172 ) -> Option<fmt::Result> {
173 tls::with_current_program(|prog| {
174 Some(prog?.debug_canonical_var_kinds(canonical_var_kinds, fmt))
175 })
176 }
177 fn debug_program_clause(
178 clause: &chalk_ir::ProgramClause<Self>,
179 fmt: &mut fmt::Formatter<'_>,
180 ) -> Option<fmt::Result> {
181 tls::with_current_program(|prog| Some(prog?.debug_program_clause(clause, fmt)))
182 }
183 fn debug_program_clauses(
184 clauses: &chalk_ir::ProgramClauses<Self>,
185 fmt: &mut fmt::Formatter<'_>,
186 ) -> Option<fmt::Result> {
187 tls::with_current_program(|prog| Some(prog?.debug_program_clauses(clauses, fmt)))
188 }
189 fn debug_quantified_where_clauses(
190 clauses: &chalk_ir::QuantifiedWhereClauses<Self>,
191 fmt: &mut fmt::Formatter<'_>,
192 ) -> Option<fmt::Result> {
193 tls::with_current_program(|prog| Some(prog?.debug_quantified_where_clauses(clauses, fmt)))
194 }
195
196 fn intern_ty(&self, ty: chalk_ir::TyData<Self>) -> Box<chalk_ir::TyData<Self>> {
197 Box::new(ty)
198 }
199
200 fn ty_data<'a>(&self, ty: &'a Box<chalk_ir::TyData<Self>>) -> &'a chalk_ir::TyData<Self> {
201 ty
202 }
203
204 fn intern_lifetime(
205 &self,
206 lifetime: chalk_ir::LifetimeData<Self>,
207 ) -> chalk_ir::LifetimeData<Self> {
208 lifetime
209 }
210
211 fn lifetime_data<'a>(
212 &self,
213 lifetime: &'a chalk_ir::LifetimeData<Self>,
214 ) -> &'a chalk_ir::LifetimeData<Self> {
215 lifetime
216 }
217
218 fn intern_const(&self, constant: chalk_ir::ConstData<Self>) -> Arc<chalk_ir::ConstData<Self>> {
219 Arc::new(constant)
220 }
221
222 fn const_data<'a>(
223 &self,
224 constant: &'a Arc<chalk_ir::ConstData<Self>>,
225 ) -> &'a chalk_ir::ConstData<Self> {
226 constant
227 }
228
229 fn const_eq(&self, _ty: &Box<chalk_ir::TyData<Self>>, _c1: &(), _c2: &()) -> bool {
230 true
231 }
232
233 fn intern_generic_arg(
234 &self,
235 parameter: chalk_ir::GenericArgData<Self>,
236 ) -> chalk_ir::GenericArgData<Self> {
237 parameter
238 }
239
240 fn generic_arg_data<'a>(
241 &self,
242 parameter: &'a chalk_ir::GenericArgData<Self>,
243 ) -> &'a chalk_ir::GenericArgData<Self> {
244 parameter
245 }
246
247 fn intern_goal(&self, goal: GoalData<Self>) -> Arc<GoalData<Self>> {
248 Arc::new(goal)
249 }
250
251 fn intern_goals<E>(
252 &self,
253 data: impl IntoIterator<Item = Result<Goal<Self>, E>>,
254 ) -> Result<Self::InternedGoals, E> {
255 data.into_iter().collect()
256 }
257
258 fn goal_data<'a>(&self, goal: &'a Arc<GoalData<Self>>) -> &'a GoalData<Self> {
259 goal
260 }
261
262 fn goals_data<'a>(&self, goals: &'a Vec<Goal<Interner>>) -> &'a [Goal<Interner>] {
263 goals
264 }
265
266 fn intern_substitution<E>(
267 &self,
268 data: impl IntoIterator<Item = Result<GenericArg<Self>, E>>,
269 ) -> Result<Vec<GenericArg<Self>>, E> {
270 data.into_iter().collect()
271 }
272
273 fn substitution_data<'a>(
274 &self,
275 substitution: &'a Vec<GenericArg<Self>>,
276 ) -> &'a [GenericArg<Self>] {
277 substitution
278 }
279
280 fn intern_program_clause(
281 &self,
282 data: chalk_ir::ProgramClauseData<Self>,
283 ) -> chalk_ir::ProgramClauseData<Self> {
284 data
285 }
286
287 fn program_clause_data<'a>(
288 &self,
289 clause: &'a chalk_ir::ProgramClauseData<Self>,
290 ) -> &'a chalk_ir::ProgramClauseData<Self> {
291 clause
292 }
293
294 fn intern_program_clauses<E>(
295 &self,
296 data: impl IntoIterator<Item = Result<chalk_ir::ProgramClause<Self>, E>>,
297 ) -> Result<Arc<[chalk_ir::ProgramClause<Self>]>, E> {
298 data.into_iter().collect()
299 }
300
301 fn program_clauses_data<'a>(
302 &self,
303 clauses: &'a Arc<[chalk_ir::ProgramClause<Self>]>,
304 ) -> &'a [chalk_ir::ProgramClause<Self>] {
305 &clauses
306 }
307
308 fn intern_quantified_where_clauses<E>(
309 &self,
310 data: impl IntoIterator<Item = Result<chalk_ir::QuantifiedWhereClause<Self>, E>>,
311 ) -> Result<Self::InternedQuantifiedWhereClauses, E> {
312 data.into_iter().collect()
313 }
314
315 fn quantified_where_clauses_data<'a>(
316 &self,
317 clauses: &'a Self::InternedQuantifiedWhereClauses,
318 ) -> &'a [chalk_ir::QuantifiedWhereClause<Self>] {
319 clauses
320 }
321
322 fn intern_generic_arg_kinds<E>(
323 &self,
324 data: impl IntoIterator<Item = Result<chalk_ir::VariableKind<Self>, E>>,
325 ) -> Result<Self::InternedVariableKinds, E> {
326 data.into_iter().collect()
327 }
328
329 fn variable_kinds_data<'a>(
330 &self,
331 parameter_kinds: &'a Self::InternedVariableKinds,
332 ) -> &'a [chalk_ir::VariableKind<Self>] {
333 &parameter_kinds
334 }
335
336 fn intern_canonical_var_kinds<E>(
337 &self,
338 data: impl IntoIterator<Item = Result<chalk_ir::CanonicalVarKind<Self>, E>>,
339 ) -> Result<Self::InternedCanonicalVarKinds, E> {
340 data.into_iter().collect()
341 }
342
343 fn canonical_var_kinds_data<'a>(
344 &self,
345 canonical_var_kinds: &'a Self::InternedCanonicalVarKinds,
346 ) -> &'a [chalk_ir::CanonicalVarKind<Self>] {
347 &canonical_var_kinds
348 }
349}
350
351impl chalk_ir::interner::HasInterner for Interner {
352 type Interner = Self;
353}
diff --git a/crates/ra_hir_ty/src/traits/chalk/mapping.rs b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
new file mode 100644
index 000000000..7082cb095
--- /dev/null
+++ b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
@@ -0,0 +1,701 @@
1//! This module contains the implementations of the `ToChalk` trait, which
2//! handles conversion between our data types and their corresponding types in
3//! Chalk (in both directions); plus some helper functions for more specialized
4//! conversions.
5
6use chalk_ir::{
7 cast::Cast, fold::shift::Shift, interner::HasInterner, PlaceholderIndex, Scalar, TypeName,
8 UniverseIndex,
9};
10
11use hir_def::{type_ref::Mutability, AssocContainerId, GenericDefId, Lookup, TypeAliasId};
12use ra_db::salsa::InternKey;
13
14use crate::{
15 db::HirDatabase,
16 primitive::{FloatBitness, FloatTy, IntBitness, IntTy, Signedness, Uncertain},
17 traits::{builtin, AssocTyValue, Canonical, Impl, Obligation},
18 ApplicationTy, CallableDef, GenericPredicate, InEnvironment, ProjectionPredicate, ProjectionTy,
19 Substs, TraitEnvironment, TraitRef, Ty, TypeCtor,
20};
21
22use super::interner::*;
23use super::*;
24
25impl ToChalk for Ty {
26 type Chalk = chalk_ir::Ty<Interner>;
27 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Ty<Interner> {
28 match self {
29 Ty::Apply(apply_ty) => match apply_ty.ctor {
30 TypeCtor::Ref(m) => ref_to_chalk(db, m, apply_ty.parameters),
31 TypeCtor::FnPtr { num_args: _ } => {
32 let substitution = apply_ty.parameters.to_chalk(db).shifted_in(&Interner);
33 chalk_ir::TyData::Function(chalk_ir::Fn { num_binders: 0, substitution })
34 .intern(&Interner)
35 }
36 _ => {
37 let name = apply_ty.ctor.to_chalk(db);
38 let substitution = apply_ty.parameters.to_chalk(db);
39 chalk_ir::ApplicationTy { name, substitution }.cast(&Interner).intern(&Interner)
40 }
41 },
42 Ty::Projection(proj_ty) => {
43 let associated_ty_id = proj_ty.associated_ty.to_chalk(db);
44 let substitution = proj_ty.parameters.to_chalk(db);
45 chalk_ir::AliasTy::Projection(chalk_ir::ProjectionTy {
46 associated_ty_id,
47 substitution,
48 })
49 .cast(&Interner)
50 .intern(&Interner)
51 }
52 Ty::Placeholder(id) => {
53 let interned_id = db.intern_type_param_id(id);
54 PlaceholderIndex {
55 ui: UniverseIndex::ROOT,
56 idx: interned_id.as_intern_id().as_usize(),
57 }
58 .to_ty::<Interner>(&Interner)
59 }
60 Ty::Bound(idx) => chalk_ir::TyData::BoundVar(idx).intern(&Interner),
61 Ty::Infer(_infer_ty) => panic!("uncanonicalized infer ty"),
62 Ty::Dyn(predicates) => {
63 let where_clauses = chalk_ir::QuantifiedWhereClauses::from(
64 &Interner,
65 predicates.iter().filter(|p| !p.is_error()).cloned().map(|p| p.to_chalk(db)),
66 );
67 let bounded_ty = chalk_ir::DynTy { bounds: make_binders(where_clauses, 1) };
68 chalk_ir::TyData::Dyn(bounded_ty).intern(&Interner)
69 }
70 Ty::Opaque(_) | Ty::Unknown => {
71 let substitution = chalk_ir::Substitution::empty(&Interner);
72 let name = TypeName::Error;
73 chalk_ir::ApplicationTy { name, substitution }.cast(&Interner).intern(&Interner)
74 }
75 }
76 }
77 fn from_chalk(db: &dyn HirDatabase, chalk: chalk_ir::Ty<Interner>) -> Self {
78 match chalk.data(&Interner).clone() {
79 chalk_ir::TyData::Apply(apply_ty) => match apply_ty.name {
80 TypeName::Error => Ty::Unknown,
81 TypeName::Ref(m) => ref_from_chalk(db, m, apply_ty.substitution),
82 _ => {
83 let ctor = from_chalk(db, apply_ty.name);
84 let parameters = from_chalk(db, apply_ty.substitution);
85 Ty::Apply(ApplicationTy { ctor, parameters })
86 }
87 },
88 chalk_ir::TyData::Placeholder(idx) => {
89 assert_eq!(idx.ui, UniverseIndex::ROOT);
90 let interned_id = crate::db::GlobalTypeParamId::from_intern_id(
91 crate::salsa::InternId::from(idx.idx),
92 );
93 Ty::Placeholder(db.lookup_intern_type_param_id(interned_id))
94 }
95 chalk_ir::TyData::Alias(chalk_ir::AliasTy::Projection(proj)) => {
96 let associated_ty = from_chalk(db, proj.associated_ty_id);
97 let parameters = from_chalk(db, proj.substitution);
98 Ty::Projection(ProjectionTy { associated_ty, parameters })
99 }
100 chalk_ir::TyData::Alias(chalk_ir::AliasTy::Opaque(_)) => unimplemented!(),
101 chalk_ir::TyData::Function(chalk_ir::Fn { num_binders: _, substitution }) => {
102 let parameters: Substs = from_chalk(db, substitution);
103 Ty::Apply(ApplicationTy {
104 ctor: TypeCtor::FnPtr { num_args: (parameters.len() - 1) as u16 },
105 parameters,
106 })
107 }
108 chalk_ir::TyData::BoundVar(idx) => Ty::Bound(idx),
109 chalk_ir::TyData::InferenceVar(_iv) => Ty::Unknown,
110 chalk_ir::TyData::Dyn(where_clauses) => {
111 assert_eq!(where_clauses.bounds.binders.len(&Interner), 1);
112 let predicates = where_clauses
113 .bounds
114 .skip_binders()
115 .iter(&Interner)
116 .map(|c| from_chalk(db, c.clone()))
117 .collect();
118 Ty::Dyn(predicates)
119 }
120 }
121 }
122}
123
124const LIFETIME_PLACEHOLDER: PlaceholderIndex =
125 PlaceholderIndex { ui: UniverseIndex::ROOT, idx: usize::MAX };
126
127/// We currently don't model lifetimes, but Chalk does. So, we have to insert a
128/// fake lifetime here, because Chalks built-in logic may expect it to be there.
129fn ref_to_chalk(
130 db: &dyn HirDatabase,
131 mutability: Mutability,
132 subst: Substs,
133) -> chalk_ir::Ty<Interner> {
134 let arg = subst[0].clone().to_chalk(db);
135 let lifetime = LIFETIME_PLACEHOLDER.to_lifetime(&Interner);
136 chalk_ir::ApplicationTy {
137 name: TypeName::Ref(mutability.to_chalk(db)),
138 substitution: chalk_ir::Substitution::from(
139 &Interner,
140 vec![lifetime.cast(&Interner), arg.cast(&Interner)],
141 ),
142 }
143 .intern(&Interner)
144}
145
146/// Here we remove the lifetime from the type we got from Chalk.
147fn ref_from_chalk(
148 db: &dyn HirDatabase,
149 mutability: chalk_ir::Mutability,
150 subst: chalk_ir::Substitution<Interner>,
151) -> Ty {
152 let tys = subst
153 .iter(&Interner)
154 .filter_map(|p| Some(from_chalk(db, p.ty(&Interner)?.clone())))
155 .collect();
156 Ty::apply(TypeCtor::Ref(from_chalk(db, mutability)), Substs(tys))
157}
158
159impl ToChalk for Substs {
160 type Chalk = chalk_ir::Substitution<Interner>;
161
162 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Substitution<Interner> {
163 chalk_ir::Substitution::from(&Interner, self.iter().map(|ty| ty.clone().to_chalk(db)))
164 }
165
166 fn from_chalk(db: &dyn HirDatabase, parameters: chalk_ir::Substitution<Interner>) -> Substs {
167 let tys = parameters
168 .iter(&Interner)
169 .map(|p| match p.ty(&Interner) {
170 Some(ty) => from_chalk(db, ty.clone()),
171 None => unimplemented!(),
172 })
173 .collect();
174 Substs(tys)
175 }
176}
177
178impl ToChalk for TraitRef {
179 type Chalk = chalk_ir::TraitRef<Interner>;
180
181 fn to_chalk(self: TraitRef, db: &dyn HirDatabase) -> chalk_ir::TraitRef<Interner> {
182 let trait_id = self.trait_.to_chalk(db);
183 let substitution = self.substs.to_chalk(db);
184 chalk_ir::TraitRef { trait_id, substitution }
185 }
186
187 fn from_chalk(db: &dyn HirDatabase, trait_ref: chalk_ir::TraitRef<Interner>) -> Self {
188 let trait_ = from_chalk(db, trait_ref.trait_id);
189 let substs = from_chalk(db, trait_ref.substitution);
190 TraitRef { trait_, substs }
191 }
192}
193
194impl ToChalk for hir_def::TraitId {
195 type Chalk = TraitId;
196
197 fn to_chalk(self, _db: &dyn HirDatabase) -> TraitId {
198 chalk_ir::TraitId(self.as_intern_id())
199 }
200
201 fn from_chalk(_db: &dyn HirDatabase, trait_id: TraitId) -> hir_def::TraitId {
202 InternKey::from_intern_id(trait_id.0)
203 }
204}
205
206impl ToChalk for TypeCtor {
207 type Chalk = TypeName<Interner>;
208
209 fn to_chalk(self, db: &dyn HirDatabase) -> TypeName<Interner> {
210 match self {
211 TypeCtor::AssociatedType(type_alias) => {
212 let type_id = type_alias.to_chalk(db);
213 TypeName::AssociatedType(type_id)
214 }
215
216 TypeCtor::Bool => TypeName::Scalar(Scalar::Bool),
217 TypeCtor::Char => TypeName::Scalar(Scalar::Char),
218 TypeCtor::Int(Uncertain::Known(int_ty)) => TypeName::Scalar(int_ty_to_chalk(int_ty)),
219 TypeCtor::Float(Uncertain::Known(FloatTy { bitness: FloatBitness::X32 })) => {
220 TypeName::Scalar(Scalar::Float(chalk_ir::FloatTy::F32))
221 }
222 TypeCtor::Float(Uncertain::Known(FloatTy { bitness: FloatBitness::X64 })) => {
223 TypeName::Scalar(Scalar::Float(chalk_ir::FloatTy::F64))
224 }
225
226 TypeCtor::Tuple { cardinality } => TypeName::Tuple(cardinality.into()),
227 TypeCtor::RawPtr(mutability) => TypeName::Raw(mutability.to_chalk(db)),
228 TypeCtor::Slice => TypeName::Slice,
229 TypeCtor::Ref(mutability) => TypeName::Ref(mutability.to_chalk(db)),
230 TypeCtor::Str => TypeName::Str,
231 TypeCtor::FnDef(callable_def) => {
232 let id = callable_def.to_chalk(db);
233 TypeName::FnDef(id)
234 }
235 TypeCtor::Int(Uncertain::Unknown)
236 | TypeCtor::Float(Uncertain::Unknown)
237 | TypeCtor::Adt(_)
238 | TypeCtor::Array
239 | TypeCtor::FnPtr { .. }
240 | TypeCtor::Never
241 | TypeCtor::Closure { .. } => {
242 // other TypeCtors get interned and turned into a chalk StructId
243 let struct_id = db.intern_type_ctor(self).into();
244 TypeName::Adt(struct_id)
245 }
246 }
247 }
248
249 fn from_chalk(db: &dyn HirDatabase, type_name: TypeName<Interner>) -> TypeCtor {
250 match type_name {
251 TypeName::Adt(struct_id) => db.lookup_intern_type_ctor(struct_id.into()),
252 TypeName::AssociatedType(type_id) => TypeCtor::AssociatedType(from_chalk(db, type_id)),
253 TypeName::OpaqueType(_) => unreachable!(),
254
255 TypeName::Scalar(Scalar::Bool) => TypeCtor::Bool,
256 TypeName::Scalar(Scalar::Char) => TypeCtor::Char,
257 TypeName::Scalar(Scalar::Int(int_ty)) => TypeCtor::Int(Uncertain::Known(IntTy {
258 signedness: Signedness::Signed,
259 bitness: bitness_from_chalk_int(int_ty),
260 })),
261 TypeName::Scalar(Scalar::Uint(uint_ty)) => TypeCtor::Int(Uncertain::Known(IntTy {
262 signedness: Signedness::Unsigned,
263 bitness: bitness_from_chalk_uint(uint_ty),
264 })),
265 TypeName::Scalar(Scalar::Float(chalk_ir::FloatTy::F32)) => {
266 TypeCtor::Float(Uncertain::Known(FloatTy { bitness: FloatBitness::X32 }))
267 }
268 TypeName::Scalar(Scalar::Float(chalk_ir::FloatTy::F64)) => {
269 TypeCtor::Float(Uncertain::Known(FloatTy { bitness: FloatBitness::X64 }))
270 }
271 TypeName::Tuple(cardinality) => TypeCtor::Tuple { cardinality: cardinality as u16 },
272 TypeName::Raw(mutability) => TypeCtor::RawPtr(from_chalk(db, mutability)),
273 TypeName::Slice => TypeCtor::Slice,
274 TypeName::Ref(mutability) => TypeCtor::Ref(from_chalk(db, mutability)),
275 TypeName::Str => TypeCtor::Str,
276
277 TypeName::FnDef(fn_def_id) => {
278 let callable_def = from_chalk(db, fn_def_id);
279 TypeCtor::FnDef(callable_def)
280 }
281
282 TypeName::Error => {
283 // this should not be reached, since we don't represent TypeName::Error with TypeCtor
284 unreachable!()
285 }
286 }
287 }
288}
289
290fn bitness_from_chalk_uint(uint_ty: chalk_ir::UintTy) -> IntBitness {
291 use chalk_ir::UintTy;
292
293 match uint_ty {
294 UintTy::Usize => IntBitness::Xsize,
295 UintTy::U8 => IntBitness::X8,
296 UintTy::U16 => IntBitness::X16,
297 UintTy::U32 => IntBitness::X32,
298 UintTy::U64 => IntBitness::X64,
299 UintTy::U128 => IntBitness::X128,
300 }
301}
302
303fn bitness_from_chalk_int(int_ty: chalk_ir::IntTy) -> IntBitness {
304 use chalk_ir::IntTy;
305
306 match int_ty {
307 IntTy::Isize => IntBitness::Xsize,
308 IntTy::I8 => IntBitness::X8,
309 IntTy::I16 => IntBitness::X16,
310 IntTy::I32 => IntBitness::X32,
311 IntTy::I64 => IntBitness::X64,
312 IntTy::I128 => IntBitness::X128,
313 }
314}
315
316fn int_ty_to_chalk(int_ty: IntTy) -> Scalar {
317 use chalk_ir::{IntTy, UintTy};
318
319 match int_ty.signedness {
320 Signedness::Signed => Scalar::Int(match int_ty.bitness {
321 IntBitness::Xsize => IntTy::Isize,
322 IntBitness::X8 => IntTy::I8,
323 IntBitness::X16 => IntTy::I16,
324 IntBitness::X32 => IntTy::I32,
325 IntBitness::X64 => IntTy::I64,
326 IntBitness::X128 => IntTy::I128,
327 }),
328 Signedness::Unsigned => Scalar::Uint(match int_ty.bitness {
329 IntBitness::Xsize => UintTy::Usize,
330 IntBitness::X8 => UintTy::U8,
331 IntBitness::X16 => UintTy::U16,
332 IntBitness::X32 => UintTy::U32,
333 IntBitness::X64 => UintTy::U64,
334 IntBitness::X128 => UintTy::U128,
335 }),
336 }
337}
338
339impl ToChalk for Mutability {
340 type Chalk = chalk_ir::Mutability;
341 fn to_chalk(self, _db: &dyn HirDatabase) -> Self::Chalk {
342 match self {
343 Mutability::Shared => chalk_ir::Mutability::Not,
344 Mutability::Mut => chalk_ir::Mutability::Mut,
345 }
346 }
347 fn from_chalk(_db: &dyn HirDatabase, chalk: Self::Chalk) -> Self {
348 match chalk {
349 chalk_ir::Mutability::Mut => Mutability::Mut,
350 chalk_ir::Mutability::Not => Mutability::Shared,
351 }
352 }
353}
354
355impl ToChalk for Impl {
356 type Chalk = ImplId;
357
358 fn to_chalk(self, db: &dyn HirDatabase) -> ImplId {
359 db.intern_chalk_impl(self).into()
360 }
361
362 fn from_chalk(db: &dyn HirDatabase, impl_id: ImplId) -> Impl {
363 db.lookup_intern_chalk_impl(impl_id.into())
364 }
365}
366
367impl ToChalk for CallableDef {
368 type Chalk = FnDefId;
369
370 fn to_chalk(self, db: &dyn HirDatabase) -> FnDefId {
371 db.intern_callable_def(self).into()
372 }
373
374 fn from_chalk(db: &dyn HirDatabase, fn_def_id: FnDefId) -> CallableDef {
375 db.lookup_intern_callable_def(fn_def_id.into())
376 }
377}
378
379impl ToChalk for TypeAliasId {
380 type Chalk = AssocTypeId;
381
382 fn to_chalk(self, _db: &dyn HirDatabase) -> AssocTypeId {
383 chalk_ir::AssocTypeId(self.as_intern_id())
384 }
385
386 fn from_chalk(_db: &dyn HirDatabase, type_alias_id: AssocTypeId) -> TypeAliasId {
387 InternKey::from_intern_id(type_alias_id.0)
388 }
389}
390
391impl ToChalk for AssocTyValue {
392 type Chalk = AssociatedTyValueId;
393
394 fn to_chalk(self, db: &dyn HirDatabase) -> AssociatedTyValueId {
395 db.intern_assoc_ty_value(self).into()
396 }
397
398 fn from_chalk(db: &dyn HirDatabase, assoc_ty_value_id: AssociatedTyValueId) -> AssocTyValue {
399 db.lookup_intern_assoc_ty_value(assoc_ty_value_id.into())
400 }
401}
402
403impl ToChalk for GenericPredicate {
404 type Chalk = chalk_ir::QuantifiedWhereClause<Interner>;
405
406 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::QuantifiedWhereClause<Interner> {
407 match self {
408 GenericPredicate::Implemented(trait_ref) => {
409 let chalk_trait_ref = trait_ref.to_chalk(db);
410 let chalk_trait_ref = chalk_trait_ref.shifted_in(&Interner);
411 make_binders(chalk_ir::WhereClause::Implemented(chalk_trait_ref), 0)
412 }
413 GenericPredicate::Projection(projection_pred) => {
414 let ty = projection_pred.ty.to_chalk(db).shifted_in(&Interner);
415 let projection = projection_pred.projection_ty.to_chalk(db).shifted_in(&Interner);
416 let alias = chalk_ir::AliasTy::Projection(projection);
417 make_binders(chalk_ir::WhereClause::AliasEq(chalk_ir::AliasEq { alias, ty }), 0)
418 }
419 GenericPredicate::Error => panic!("tried passing GenericPredicate::Error to Chalk"),
420 }
421 }
422
423 fn from_chalk(
424 db: &dyn HirDatabase,
425 where_clause: chalk_ir::QuantifiedWhereClause<Interner>,
426 ) -> GenericPredicate {
427 // we don't produce any where clauses with binders and can't currently deal with them
428 match where_clause
429 .skip_binders()
430 .shifted_out(&Interner)
431 .expect("unexpected bound vars in where clause")
432 {
433 chalk_ir::WhereClause::Implemented(tr) => {
434 GenericPredicate::Implemented(from_chalk(db, tr))
435 }
436 chalk_ir::WhereClause::AliasEq(projection_eq) => {
437 let projection_ty = from_chalk(
438 db,
439 match projection_eq.alias {
440 chalk_ir::AliasTy::Projection(p) => p,
441 _ => unimplemented!(),
442 },
443 );
444 let ty = from_chalk(db, projection_eq.ty);
445 GenericPredicate::Projection(ProjectionPredicate { projection_ty, ty })
446 }
447 }
448 }
449}
450
451impl ToChalk for ProjectionTy {
452 type Chalk = chalk_ir::ProjectionTy<Interner>;
453
454 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::ProjectionTy<Interner> {
455 chalk_ir::ProjectionTy {
456 associated_ty_id: self.associated_ty.to_chalk(db),
457 substitution: self.parameters.to_chalk(db),
458 }
459 }
460
461 fn from_chalk(
462 db: &dyn HirDatabase,
463 projection_ty: chalk_ir::ProjectionTy<Interner>,
464 ) -> ProjectionTy {
465 ProjectionTy {
466 associated_ty: from_chalk(db, projection_ty.associated_ty_id),
467 parameters: from_chalk(db, projection_ty.substitution),
468 }
469 }
470}
471
472impl ToChalk for ProjectionPredicate {
473 type Chalk = chalk_ir::AliasEq<Interner>;
474
475 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::AliasEq<Interner> {
476 chalk_ir::AliasEq {
477 alias: chalk_ir::AliasTy::Projection(self.projection_ty.to_chalk(db)),
478 ty: self.ty.to_chalk(db),
479 }
480 }
481
482 fn from_chalk(_db: &dyn HirDatabase, _normalize: chalk_ir::AliasEq<Interner>) -> Self {
483 unimplemented!()
484 }
485}
486
487impl ToChalk for Obligation {
488 type Chalk = chalk_ir::DomainGoal<Interner>;
489
490 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::DomainGoal<Interner> {
491 match self {
492 Obligation::Trait(tr) => tr.to_chalk(db).cast(&Interner),
493 Obligation::Projection(pr) => pr.to_chalk(db).cast(&Interner),
494 }
495 }
496
497 fn from_chalk(_db: &dyn HirDatabase, _goal: chalk_ir::DomainGoal<Interner>) -> Self {
498 unimplemented!()
499 }
500}
501
502impl<T> ToChalk for Canonical<T>
503where
504 T: ToChalk,
505 T::Chalk: HasInterner<Interner = Interner>,
506{
507 type Chalk = chalk_ir::Canonical<T::Chalk>;
508
509 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Canonical<T::Chalk> {
510 let parameter = chalk_ir::CanonicalVarKind::new(
511 chalk_ir::VariableKind::Ty,
512 chalk_ir::UniverseIndex::ROOT,
513 );
514 let value = self.value.to_chalk(db);
515 chalk_ir::Canonical {
516 value,
517 binders: chalk_ir::CanonicalVarKinds::from(&Interner, vec![parameter; self.num_vars]),
518 }
519 }
520
521 fn from_chalk(db: &dyn HirDatabase, canonical: chalk_ir::Canonical<T::Chalk>) -> Canonical<T> {
522 Canonical {
523 num_vars: canonical.binders.len(&Interner),
524 value: from_chalk(db, canonical.value),
525 }
526 }
527}
528
529impl ToChalk for Arc<TraitEnvironment> {
530 type Chalk = chalk_ir::Environment<Interner>;
531
532 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Environment<Interner> {
533 let mut clauses = Vec::new();
534 for pred in &self.predicates {
535 if pred.is_error() {
536 // for env, we just ignore errors
537 continue;
538 }
539 let program_clause: chalk_ir::ProgramClause<Interner> =
540 pred.clone().to_chalk(db).cast(&Interner);
541 clauses.push(program_clause.into_from_env_clause(&Interner));
542 }
543 chalk_ir::Environment::new(&Interner).add_clauses(&Interner, clauses)
544 }
545
546 fn from_chalk(
547 _db: &dyn HirDatabase,
548 _env: chalk_ir::Environment<Interner>,
549 ) -> Arc<TraitEnvironment> {
550 unimplemented!()
551 }
552}
553
554impl<T: ToChalk> ToChalk for InEnvironment<T>
555where
556 T::Chalk: chalk_ir::interner::HasInterner<Interner = Interner>,
557{
558 type Chalk = chalk_ir::InEnvironment<T::Chalk>;
559
560 fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::InEnvironment<T::Chalk> {
561 chalk_ir::InEnvironment {
562 environment: self.environment.to_chalk(db),
563 goal: self.value.to_chalk(db),
564 }
565 }
566
567 fn from_chalk(
568 db: &dyn HirDatabase,
569 in_env: chalk_ir::InEnvironment<T::Chalk>,
570 ) -> InEnvironment<T> {
571 InEnvironment {
572 environment: from_chalk(db, in_env.environment),
573 value: from_chalk(db, in_env.goal),
574 }
575 }
576}
577
578impl ToChalk for builtin::BuiltinImplData {
579 type Chalk = ImplDatum;
580
581 fn to_chalk(self, db: &dyn HirDatabase) -> ImplDatum {
582 let impl_type = chalk_rust_ir::ImplType::External;
583 let where_clauses = self.where_clauses.into_iter().map(|w| w.to_chalk(db)).collect();
584
585 let impl_datum_bound =
586 chalk_rust_ir::ImplDatumBound { trait_ref: self.trait_ref.to_chalk(db), where_clauses };
587 let associated_ty_value_ids =
588 self.assoc_ty_values.into_iter().map(|v| v.to_chalk(db)).collect();
589 chalk_rust_ir::ImplDatum {
590 binders: make_binders(impl_datum_bound, self.num_vars),
591 impl_type,
592 polarity: chalk_rust_ir::Polarity::Positive,
593 associated_ty_value_ids,
594 }
595 }
596
597 fn from_chalk(_db: &dyn HirDatabase, _data: ImplDatum) -> Self {
598 unimplemented!()
599 }
600}
601
602impl ToChalk for builtin::BuiltinImplAssocTyValueData {
603 type Chalk = AssociatedTyValue;
604
605 fn to_chalk(self, db: &dyn HirDatabase) -> AssociatedTyValue {
606 let ty = self.value.to_chalk(db);
607 let value_bound = chalk_rust_ir::AssociatedTyValueBound { ty };
608
609 chalk_rust_ir::AssociatedTyValue {
610 associated_ty_id: self.assoc_ty_id.to_chalk(db),
611 impl_id: self.impl_.to_chalk(db),
612 value: make_binders(value_bound, self.num_vars),
613 }
614 }
615
616 fn from_chalk(
617 _db: &dyn HirDatabase,
618 _data: AssociatedTyValue,
619 ) -> builtin::BuiltinImplAssocTyValueData {
620 unimplemented!()
621 }
622}
623
624pub(super) fn make_binders<T>(value: T, num_vars: usize) -> chalk_ir::Binders<T>
625where
626 T: HasInterner<Interner = Interner>,
627{
628 chalk_ir::Binders::new(
629 chalk_ir::VariableKinds::from(
630 &Interner,
631 std::iter::repeat(chalk_ir::VariableKind::Ty).take(num_vars),
632 ),
633 value,
634 )
635}
636
637pub(super) fn convert_where_clauses(
638 db: &dyn HirDatabase,
639 def: GenericDefId,
640 substs: &Substs,
641) -> Vec<chalk_ir::QuantifiedWhereClause<Interner>> {
642 let generic_predicates = db.generic_predicates(def);
643 let mut result = Vec::with_capacity(generic_predicates.len());
644 for pred in generic_predicates.iter() {
645 if pred.value.is_error() {
646 // skip errored predicates completely
647 continue;
648 }
649 result.push(pred.clone().subst(substs).to_chalk(db));
650 }
651 result
652}
653
654pub(super) fn generic_predicate_to_inline_bound(
655 db: &dyn HirDatabase,
656 pred: &GenericPredicate,
657 self_ty: &Ty,
658) -> Option<chalk_rust_ir::InlineBound<Interner>> {
659 // An InlineBound is like a GenericPredicate, except the self type is left out.
660 // We don't have a special type for this, but Chalk does.
661 match pred {
662 GenericPredicate::Implemented(trait_ref) => {
663 if &trait_ref.substs[0] != self_ty {
664 // we can only convert predicates back to type bounds if they
665 // have the expected self type
666 return None;
667 }
668 let args_no_self = trait_ref.substs[1..]
669 .iter()
670 .map(|ty| ty.clone().to_chalk(db).cast(&Interner))
671 .collect();
672 let trait_bound =
673 chalk_rust_ir::TraitBound { trait_id: trait_ref.trait_.to_chalk(db), args_no_self };
674 Some(chalk_rust_ir::InlineBound::TraitBound(trait_bound))
675 }
676 GenericPredicate::Projection(proj) => {
677 if &proj.projection_ty.parameters[0] != self_ty {
678 return None;
679 }
680 let trait_ = match proj.projection_ty.associated_ty.lookup(db.upcast()).container {
681 AssocContainerId::TraitId(t) => t,
682 _ => panic!("associated type not in trait"),
683 };
684 let args_no_self = proj.projection_ty.parameters[1..]
685 .iter()
686 .map(|ty| ty.clone().to_chalk(db).cast(&Interner))
687 .collect();
688 let alias_eq_bound = chalk_rust_ir::AliasEqBound {
689 value: proj.ty.clone().to_chalk(db),
690 trait_bound: chalk_rust_ir::TraitBound {
691 trait_id: trait_.to_chalk(db),
692 args_no_self,
693 },
694 associated_ty_id: proj.projection_ty.associated_ty.to_chalk(db),
695 parameters: Vec::new(), // FIXME we don't support generic associated types yet
696 };
697 Some(chalk_rust_ir::InlineBound::AliasEqBound(alias_eq_bound))
698 }
699 GenericPredicate::Error => None,
700 }
701}
diff --git a/crates/ra_hir_ty/src/traits/chalk/tls.rs b/crates/ra_hir_ty/src/traits/chalk/tls.rs
index 4867cb17e..d88828c7c 100644
--- a/crates/ra_hir_ty/src/traits/chalk/tls.rs
+++ b/crates/ra_hir_ty/src/traits/chalk/tls.rs
@@ -1,7 +1,7 @@
1//! Implementation of Chalk debug helper functions using TLS. 1//! Implementation of Chalk debug helper functions using TLS.
2use std::fmt; 2use std::fmt;
3 3
4use chalk_ir::{AliasTy, Goal, Goals, Lifetime, Parameter, ProgramClauseImplication, TypeName}; 4use chalk_ir::{AliasTy, GenericArg, Goal, Goals, Lifetime, ProgramClauseImplication, TypeName};
5use itertools::Itertools; 5use itertools::Itertools;
6 6
7use super::{from_chalk, Interner}; 7use super::{from_chalk, Interner};
@@ -15,10 +15,10 @@ pub struct DebugContext<'a>(&'a (dyn HirDatabase + 'a));
15impl DebugContext<'_> { 15impl DebugContext<'_> {
16 pub fn debug_struct_id( 16 pub fn debug_struct_id(
17 &self, 17 &self,
18 id: super::StructId, 18 id: super::AdtId,
19 f: &mut fmt::Formatter<'_>, 19 f: &mut fmt::Formatter<'_>,
20 ) -> Result<(), fmt::Error> { 20 ) -> Result<(), fmt::Error> {
21 let type_ctor: TypeCtor = from_chalk(self.0, TypeName::Struct(id)); 21 let type_ctor: TypeCtor = from_chalk(self.0, TypeName::Adt(id));
22 match type_ctor { 22 match type_ctor {
23 TypeCtor::Bool => write!(f, "bool")?, 23 TypeCtor::Bool => write!(f, "bool")?,
24 TypeCtor::Char => write!(f, "char")?, 24 TypeCtor::Char => write!(f, "char")?,
@@ -188,9 +188,9 @@ impl DebugContext<'_> {
188 write!(fmt, "{:?}", lifetime.data(&Interner)) 188 write!(fmt, "{:?}", lifetime.data(&Interner))
189 } 189 }
190 190
191 pub fn debug_parameter( 191 pub fn debug_generic_arg(
192 &self, 192 &self,
193 parameter: &Parameter<Interner>, 193 parameter: &GenericArg<Interner>,
194 fmt: &mut fmt::Formatter<'_>, 194 fmt: &mut fmt::Formatter<'_>,
195 ) -> Result<(), fmt::Error> { 195 ) -> Result<(), fmt::Error> {
196 write!(fmt, "{:?}", parameter.data(&Interner).inner_debug()) 196 write!(fmt, "{:?}", parameter.data(&Interner).inner_debug())
@@ -244,6 +244,79 @@ impl DebugContext<'_> {
244 ) -> Result<(), fmt::Error> { 244 ) -> Result<(), fmt::Error> {
245 write!(fmt, "{:?}", separator_trait_ref.debug(&Interner)) 245 write!(fmt, "{:?}", separator_trait_ref.debug(&Interner))
246 } 246 }
247
248 pub fn debug_fn_def_id(
249 &self,
250 fn_def_id: chalk_ir::FnDefId<Interner>,
251 fmt: &mut fmt::Formatter<'_>,
252 ) -> Result<(), fmt::Error> {
253 let def: CallableDef = from_chalk(self.0, fn_def_id);
254 let name = match def {
255 CallableDef::FunctionId(ff) => self.0.function_data(ff).name.clone(),
256 CallableDef::StructId(s) => self.0.struct_data(s).name.clone(),
257 CallableDef::EnumVariantId(e) => {
258 let enum_data = self.0.enum_data(e.parent);
259 enum_data.variants[e.local_id].name.clone()
260 }
261 };
262 match def {
263 CallableDef::FunctionId(_) => write!(fmt, "{{fn {}}}", name),
264 CallableDef::StructId(_) | CallableDef::EnumVariantId(_) => {
265 write!(fmt, "{{ctor {}}}", name)
266 }
267 }
268 }
269
270 pub fn debug_const(
271 &self,
272 _constant: &chalk_ir::Const<Interner>,
273 fmt: &mut fmt::Formatter<'_>,
274 ) -> fmt::Result {
275 write!(fmt, "const")
276 }
277
278 pub fn debug_variable_kinds(
279 &self,
280 variable_kinds: &chalk_ir::VariableKinds<Interner>,
281 fmt: &mut fmt::Formatter<'_>,
282 ) -> fmt::Result {
283 write!(fmt, "{:?}", variable_kinds.as_slice(&Interner))
284 }
285 pub fn debug_variable_kinds_with_angles(
286 &self,
287 variable_kinds: &chalk_ir::VariableKinds<Interner>,
288 fmt: &mut fmt::Formatter<'_>,
289 ) -> fmt::Result {
290 write!(fmt, "{:?}", variable_kinds.inner_debug(&Interner))
291 }
292 pub fn debug_canonical_var_kinds(
293 &self,
294 canonical_var_kinds: &chalk_ir::CanonicalVarKinds<Interner>,
295 fmt: &mut fmt::Formatter<'_>,
296 ) -> fmt::Result {
297 write!(fmt, "{:?}", canonical_var_kinds.as_slice(&Interner))
298 }
299 pub fn debug_program_clause(
300 &self,
301 clause: &chalk_ir::ProgramClause<Interner>,
302 fmt: &mut fmt::Formatter<'_>,
303 ) -> fmt::Result {
304 write!(fmt, "{:?}", clause.data(&Interner))
305 }
306 pub fn debug_program_clauses(
307 &self,
308 clauses: &chalk_ir::ProgramClauses<Interner>,
309 fmt: &mut fmt::Formatter<'_>,
310 ) -> fmt::Result {
311 write!(fmt, "{:?}", clauses.as_slice(&Interner))
312 }
313 pub fn debug_quantified_where_clauses(
314 &self,
315 clauses: &chalk_ir::QuantifiedWhereClauses<Interner>,
316 fmt: &mut fmt::Formatter<'_>,
317 ) -> fmt::Result {
318 write!(fmt, "{:?}", clauses.as_slice(&Interner))
319 }
247} 320}
248 321
249mod unsafe_tls { 322mod unsafe_tls {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 16:37:49 +0000