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Migrate predicates_of and caller_bounds to Clause

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This commit is contained in:
Michael Goulet 2023-06-22 18:17:13 +00:00
parent 36fb58e433
commit fbdef58414
77 changed files with 478 additions and 705 deletions
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6
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View file

@ -220,7 +220,7 @@ fn compare_method_predicate_entailment<'tcx>(
// the new hybrid bounds we computed.
let normalize_cause = traits::ObligationCause::misc(impl_m_span, impl_m_def_id);
let param_env = ty::ParamEnv::new(
tcx.mk_predicates(&hybrid_preds.predicates),
tcx.mk_clauses(&hybrid_preds.predicates),
Reveal::UserFacing,
hir::Constness::NotConst,
);
@ -1835,7 +1835,7 @@ fn compare_type_predicate_entailment<'tcx>(
let impl_ty_span = tcx.def_span(impl_ty_def_id);
let normalize_cause = traits::ObligationCause::misc(impl_ty_span, impl_ty_def_id);
let param_env = ty::ParamEnv::new(
tcx.mk_predicates(&hybrid_preds.predicates),
tcx.mk_clauses(&hybrid_preds.predicates),
Reveal::UserFacing,
hir::Constness::NotConst,
);
@ -2011,7 +2011,7 @@ pub(super) fn check_type_bounds<'tcx>(
.to_predicate(tcx),
),
};
ty::ParamEnv::new(tcx.mk_predicates(&predicates), Reveal::UserFacing, param_env.constness())
ty::ParamEnv::new(tcx.mk_clauses(&predicates), Reveal::UserFacing, param_env.constness())
};
debug!(?normalize_param_env);

8
compiler/rustc_hir_analysis/src/check/mod.rs
View file

@ -296,7 +296,7 @@ fn default_body_is_unstable(
/// Re-sugar `ty::GenericPredicates` in a way suitable to be used in structured suggestions.
fn bounds_from_generic_predicates<'tcx>(
tcx: TyCtxt<'tcx>,
predicates: impl IntoIterator<Item = (ty::Predicate<'tcx>, Span)>,
predicates: impl IntoIterator<Item = (ty::Clause<'tcx>, Span)>,
) -> (String, String) {
let mut types: FxHashMap<Ty<'tcx>, Vec<DefId>> = FxHashMap::default();
let mut projections = vec![];
@ -304,7 +304,7 @@ fn bounds_from_generic_predicates<'tcx>(
debug!("predicate {:?}", predicate);
let bound_predicate = predicate.kind();
match bound_predicate.skip_binder() {
ty::PredicateKind::Clause(ty::ClauseKind::Trait(trait_predicate)) => {
ty::ClauseKind::Trait(trait_predicate) => {
let entry = types.entry(trait_predicate.self_ty()).or_default();
let def_id = trait_predicate.def_id();
if Some(def_id) != tcx.lang_items().sized_trait() {
@ -313,7 +313,7 @@ fn bounds_from_generic_predicates<'tcx>(
entry.push(trait_predicate.def_id());
}
}
ty::PredicateKind::Clause(ty::ClauseKind::Projection(projection_pred)) => {
ty::ClauseKind::Projection(projection_pred) => {
projections.push(bound_predicate.rebind(projection_pred));
}
_ => {}
@ -362,7 +362,7 @@ fn fn_sig_suggestion<'tcx>(
tcx: TyCtxt<'tcx>,
sig: ty::FnSig<'tcx>,
ident: Ident,
predicates: impl IntoIterator<Item = (ty::Predicate<'tcx>, Span)>,
predicates: impl IntoIterator<Item = (ty::Clause<'tcx>, Span)>,
assoc: ty::AssocItem,
) -> String {
let args = sig

64
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View file

@ -15,7 +15,7 @@ use rustc_middle::mir::ConstraintCategory;
use rustc_middle::query::Providers;
use rustc_middle::ty::trait_def::TraitSpecializationKind;
use rustc_middle::ty::{
self, AdtKind, GenericParamDefKind, Ty, TyCtxt, TypeFoldable, TypeSuperVisitable,
self, AdtKind, GenericParamDefKind, ToPredicate, Ty, TyCtxt, TypeFoldable, TypeSuperVisitable,
TypeVisitable, TypeVisitableExt, TypeVisitor,
};
use rustc_middle::ty::{GenericArgKind, InternalSubsts};
@ -322,7 +322,7 @@ fn check_gat_where_clauses(tcx: TyCtxt<'_>, associated_items: &[hir::TraitItemRe
// Gather the bounds with which all other items inside of this trait constrain the GAT.
// This is calculated by taking the intersection of the bounds that each item
// constrains the GAT with individually.
let mut new_required_bounds: Option<FxHashSet<ty::Predicate<'_>>> = None;
let mut new_required_bounds: Option<FxHashSet<ty::Clause<'_>>> = None;
for item in associated_items {
let item_def_id = item.id.owner_id;
// Skip our own GAT, since it does not constrain itself at all.
@ -419,9 +419,17 @@ fn check_gat_where_clauses(tcx: TyCtxt<'_>, associated_items: &[hir::TraitItemRe
let mut unsatisfied_bounds: Vec<_> = required_bounds
.into_iter()
.filter(|clause| match clause.kind().skip_binder() {
ty::PredicateKind::Clause(ty::ClauseKind::RegionOutlives(
ty::OutlivesPredicate(a, b),
)) => !region_known_to_outlive(
ty::ClauseKind::RegionOutlives(ty::OutlivesPredicate(a, b)) => {
!region_known_to_outlive(
tcx,
gat_def_id.def_id,
param_env,
&FxIndexSet::default(),
a,
b,
)
}
ty::ClauseKind::TypeOutlives(ty::OutlivesPredicate(a, b)) => !ty_known_to_outlive(
tcx,
gat_def_id.def_id,
param_env,
@ -429,18 +437,7 @@ fn check_gat_where_clauses(tcx: TyCtxt<'_>, associated_items: &[hir::TraitItemRe
a,
b,
),
ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(ty::OutlivesPredicate(
a,
b,
))) => !ty_known_to_outlive(
tcx,
gat_def_id.def_id,
param_env,
&FxIndexSet::default(),
a,
b,
),
_ => bug!("Unexpected PredicateKind"),
_ => bug!("Unexpected ClauseKind"),
})
.map(|clause| clause.to_string())
.collect();
@ -488,7 +485,7 @@ fn check_gat_where_clauses(tcx: TyCtxt<'_>, associated_items: &[hir::TraitItemRe
fn augment_param_env<'tcx>(
tcx: TyCtxt<'tcx>,
param_env: ty::ParamEnv<'tcx>,
new_predicates: Option<&FxHashSet<ty::Predicate<'tcx>>>,
new_predicates: Option<&FxHashSet<ty::Clause<'tcx>>>,
) -> ty::ParamEnv<'tcx> {
let Some(new_predicates) = new_predicates else {
return param_env;
@ -498,7 +495,7 @@ fn augment_param_env<'tcx>(
return param_env;
}
let bounds = tcx.mk_predicates_from_iter(
let bounds = tcx.mk_clauses_from_iter(
param_env.caller_bounds().iter().chain(new_predicates.iter().cloned()),
);
// FIXME(compiler-errors): Perhaps there is a case where we need to normalize this
@ -524,7 +521,7 @@ fn gather_gat_bounds<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>(
wf_tys: &FxIndexSet<Ty<'tcx>>,
gat_def_id: LocalDefId,
gat_generics: &'tcx ty::Generics,
) -> Option<FxHashSet<ty::Predicate<'tcx>>> {
) -> Option<FxHashSet<ty::Clause<'tcx>>> {
// The bounds we that we would require from `to_check`
let mut bounds = FxHashSet::default();
@ -573,11 +570,10 @@ fn gather_gat_bounds<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>(
);
// The predicate we expect to see. (In our example,
// `Self: 'me`.)
let clause = ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(
ty::OutlivesPredicate(ty_param, region_param),
));
let clause = tcx.mk_predicate(ty::Binder::dummy(clause));
bounds.insert(clause);
bounds.insert(
ty::ClauseKind::TypeOutlives(ty::OutlivesPredicate(ty_param, region_param))
.to_predicate(tcx),
);
}
}
@ -622,11 +618,13 @@ fn gather_gat_bounds<'tcx, T: TypeFoldable<TyCtxt<'tcx>>>(
},
);
// The predicate we expect to see.
let clause = ty::PredicateKind::Clause(ty::ClauseKind::RegionOutlives(
ty::OutlivesPredicate(region_a_param, region_b_param),
));
let clause = tcx.mk_predicate(ty::Binder::dummy(clause));
bounds.insert(clause);
bounds.insert(
ty::ClauseKind::RegionOutlives(ty::OutlivesPredicate(
region_a_param,
region_b_param,
))
.to_predicate(tcx),
);
}
}
}
@ -1406,7 +1404,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
infcx,
wfcx.param_env.without_const(),
wfcx.body_def_id,
p,
p.as_predicate(),
sp,
)
});
@ -1875,9 +1873,7 @@ impl<'tcx> WfCheckingCtxt<'_, 'tcx> {
// We lower empty bounds like `Vec<dyn Copy>:` as
// `WellFormed(Vec<dyn Copy>)`, which will later get checked by
// regular WF checking
if let ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(..)) =
pred.kind().skip_binder()
{
if let ty::ClauseKind::WellFormed(..) = pred.kind().skip_binder() {
continue;
}
// Match the existing behavior.