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Rollup merge of rust-lang#127333 - compiler-errors:infer_ctxt_like-ag…
…ain, r=lcnr Split `SolverDelegate` back out from `InferCtxtLike` This is because in order to uplift things like the `Generalizer` and other `TypeRelation`s, we want to be able to interface with `InferCtxtLike` (and `InferCtxt` as its implementation), rather that `SolverDelegate`, which only really exists as a hack to be able to define some downstream methods in `rustc_type_ir`. r? lcnr
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| ///! Definition of `InferCtxtLike` from the librarified type layer. | ||
| use rustc_hir::def_id::{DefId, LocalDefId}; | ||
| use rustc_middle::traits::solve::{Goal, NoSolution, SolverMode}; | ||
| use rustc_middle::traits::ObligationCause; | ||
| use rustc_middle::ty::fold::TypeFoldable; | ||
| use rustc_middle::ty::{self, Ty, TyCtxt}; | ||
| use rustc_span::DUMMY_SP; | ||
| use rustc_type_ir::relate::Relate; | ||
| use rustc_type_ir::InferCtxtLike; | ||
|
|
||
| use super::{BoundRegionConversionTime, InferCtxt, SubregionOrigin}; | ||
|
|
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| impl<'tcx> InferCtxtLike for InferCtxt<'tcx> { | ||
| type Interner = TyCtxt<'tcx>; | ||
|
|
||
| fn cx(&self) -> TyCtxt<'tcx> { | ||
| self.tcx | ||
| } | ||
|
|
||
| fn solver_mode(&self) -> ty::solve::SolverMode { | ||
| match self.intercrate { | ||
| true => SolverMode::Coherence, | ||
| false => SolverMode::Normal, | ||
| } | ||
| } | ||
|
|
||
| fn universe(&self) -> ty::UniverseIndex { | ||
| self.universe() | ||
| } | ||
|
|
||
| fn create_next_universe(&self) -> ty::UniverseIndex { | ||
| self.create_next_universe() | ||
| } | ||
|
|
||
| fn universe_of_ty(&self, vid: ty::TyVid) -> Option<ty::UniverseIndex> { | ||
| match self.probe_ty_var(vid) { | ||
| Err(universe) => Some(universe), | ||
| Ok(_) => None, | ||
| } | ||
| } | ||
|
|
||
| fn universe_of_lt(&self, lt: ty::RegionVid) -> Option<ty::UniverseIndex> { | ||
| match self.inner.borrow_mut().unwrap_region_constraints().probe_value(lt) { | ||
| Err(universe) => Some(universe), | ||
| Ok(_) => None, | ||
| } | ||
| } | ||
|
|
||
| fn universe_of_ct(&self, ct: ty::ConstVid) -> Option<ty::UniverseIndex> { | ||
| match self.probe_const_var(ct) { | ||
| Err(universe) => Some(universe), | ||
| Ok(_) => None, | ||
| } | ||
| } | ||
|
|
||
| fn root_ty_var(&self, var: ty::TyVid) -> ty::TyVid { | ||
| self.root_var(var) | ||
| } | ||
|
|
||
| fn root_const_var(&self, var: ty::ConstVid) -> ty::ConstVid { | ||
| self.root_const_var(var) | ||
| } | ||
|
|
||
| fn opportunistic_resolve_ty_var(&self, vid: ty::TyVid) -> Ty<'tcx> { | ||
| match self.probe_ty_var(vid) { | ||
| Ok(ty) => ty, | ||
| Err(_) => Ty::new_var(self.tcx, self.root_var(vid)), | ||
| } | ||
| } | ||
|
|
||
| fn opportunistic_resolve_int_var(&self, vid: ty::IntVid) -> Ty<'tcx> { | ||
| self.opportunistic_resolve_int_var(vid) | ||
| } | ||
|
|
||
| fn opportunistic_resolve_float_var(&self, vid: ty::FloatVid) -> Ty<'tcx> { | ||
| self.opportunistic_resolve_float_var(vid) | ||
| } | ||
|
|
||
| fn opportunistic_resolve_ct_var(&self, vid: ty::ConstVid) -> ty::Const<'tcx> { | ||
| match self.probe_const_var(vid) { | ||
| Ok(ct) => ct, | ||
| Err(_) => ty::Const::new_var(self.tcx, self.root_const_var(vid)), | ||
| } | ||
| } | ||
|
|
||
| fn opportunistic_resolve_effect_var(&self, vid: ty::EffectVid) -> ty::Const<'tcx> { | ||
| match self.probe_effect_var(vid) { | ||
| Some(ct) => ct, | ||
| None => { | ||
| ty::Const::new_infer(self.tcx, ty::InferConst::EffectVar(self.root_effect_var(vid))) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn opportunistic_resolve_lt_var(&self, vid: ty::RegionVid) -> ty::Region<'tcx> { | ||
| self.inner.borrow_mut().unwrap_region_constraints().opportunistic_resolve_var(self.tcx, vid) | ||
| } | ||
|
|
||
| fn defining_opaque_types(&self) -> &'tcx ty::List<LocalDefId> { | ||
| self.defining_opaque_types() | ||
| } | ||
|
|
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| fn next_ty_infer(&self) -> Ty<'tcx> { | ||
| self.next_ty_var(DUMMY_SP) | ||
| } | ||
|
|
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| fn next_const_infer(&self) -> ty::Const<'tcx> { | ||
| self.next_const_var(DUMMY_SP) | ||
| } | ||
|
|
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| fn fresh_args_for_item(&self, def_id: DefId) -> ty::GenericArgsRef<'tcx> { | ||
| self.fresh_args_for_item(DUMMY_SP, def_id) | ||
| } | ||
|
|
||
| fn instantiate_binder_with_infer<T: TypeFoldable<TyCtxt<'tcx>> + Copy>( | ||
| &self, | ||
| value: ty::Binder<'tcx, T>, | ||
| ) -> T { | ||
| self.instantiate_binder_with_fresh_vars( | ||
| DUMMY_SP, | ||
| BoundRegionConversionTime::HigherRankedType, | ||
| value, | ||
| ) | ||
| } | ||
|
|
||
| fn enter_forall<T: TypeFoldable<TyCtxt<'tcx>> + Copy, U>( | ||
| &self, | ||
| value: ty::Binder<'tcx, T>, | ||
| f: impl FnOnce(T) -> U, | ||
| ) -> U { | ||
| self.enter_forall(value, f) | ||
| } | ||
|
|
||
| fn relate<T: Relate<TyCtxt<'tcx>>>( | ||
| &self, | ||
| param_env: ty::ParamEnv<'tcx>, | ||
| lhs: T, | ||
| variance: ty::Variance, | ||
| rhs: T, | ||
| ) -> Result<Vec<Goal<'tcx, ty::Predicate<'tcx>>>, NoSolution> { | ||
| self.at(&ObligationCause::dummy(), param_env).relate_no_trace(lhs, variance, rhs) | ||
| } | ||
|
|
||
| fn eq_structurally_relating_aliases<T: Relate<TyCtxt<'tcx>>>( | ||
| &self, | ||
| param_env: ty::ParamEnv<'tcx>, | ||
| lhs: T, | ||
| rhs: T, | ||
| ) -> Result<Vec<Goal<'tcx, ty::Predicate<'tcx>>>, NoSolution> { | ||
| self.at(&ObligationCause::dummy(), param_env) | ||
| .eq_structurally_relating_aliases_no_trace(lhs, rhs) | ||
| } | ||
|
|
||
| fn resolve_vars_if_possible<T>(&self, value: T) -> T | ||
| where | ||
| T: TypeFoldable<TyCtxt<'tcx>>, | ||
| { | ||
| self.resolve_vars_if_possible(value) | ||
| } | ||
|
|
||
| fn probe<T>(&self, probe: impl FnOnce() -> T) -> T { | ||
| self.probe(|_| probe()) | ||
| } | ||
|
|
||
| fn sub_regions(&self, sub: ty::Region<'tcx>, sup: ty::Region<'tcx>) { | ||
| self.sub_regions(SubregionOrigin::RelateRegionParamBound(DUMMY_SP), sub, sup) | ||
| } | ||
|
|
||
| fn register_ty_outlives(&self, ty: Ty<'tcx>, r: ty::Region<'tcx>) { | ||
| self.register_region_obligation_with_cause(ty, r, &ObligationCause::dummy()); | ||
| } | ||
| } |
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