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Ensure no one constructs AliasTys themselves

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This commit is contained in:
Oli Scherer 2022-12-13 11:07:42 +00:00
parent 4ffe3bdf99
commit a5cd3bde95
50 changed files with 104 additions and 106 deletions
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2
compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
View File

@ -697,7 +697,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
.map_bound(|p| p.predicates),
None,
),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
find_fn_kind_from_did(tcx.bound_explicit_item_bounds(*def_id), Some(*substs))
}
ty::Closure(_, substs) => match substs.as_closure().kind() {

2
compiler/rustc_borrowck/src/diagnostics/region_errors.rs
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@ -504,7 +504,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
let ErrorConstraintInfo { outlived_fr, span, .. } = errci;
let mut output_ty = self.regioncx.universal_regions().unnormalized_output_ty;
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = *output_ty.kind() {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *output_ty.kind() {
output_ty = self.infcx.tcx.type_of(def_id)
};

2
compiler/rustc_const_eval/src/transform/validate.rs
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@ -241,7 +241,7 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
};
let kind = match parent_ty.ty.kind() {
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
self.tcx.bound_type_of(def_id).subst(self.tcx, substs).kind()
}
kind => kind,

2
compiler/rustc_const_eval/src/util/type_name.rs
View File

@ -58,7 +58,7 @@ impl<'tcx> Printer<'tcx> for AbsolutePathPrinter<'tcx> {
// Types with identity (print the module path).
ty::Adt(ty::AdtDef(Interned(&ty::AdtDefData { did: def_id, .. }, _)), substs)
| ty::FnDef(def_id, substs)
| ty::Alias(_, ty::AliasTy { def_id, substs })
| ty::Alias(_, ty::AliasTy { def_id, substs, .. })
| ty::Closure(def_id, substs)
| ty::Generator(def_id, substs, _) => self.print_def_path(def_id, substs),
ty::Foreign(def_id) => self.print_def_path(def_id, &[]),

2
compiler/rustc_hir_analysis/src/check/check.rs
View File

@ -1440,7 +1440,7 @@ fn opaque_type_cycle_error(tcx: TyCtxt<'_>, def_id: LocalDefId, span: Span) -> E
impl<'tcx> ty::visit::TypeVisitor<'tcx> for OpaqueTypeCollector {
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
match *t.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, .. }) => {
self.0.push(def);
ControlFlow::CONTINUE
}

4
compiler/rustc_hir_analysis/src/variance/mod.rs
View File

@ -111,7 +111,7 @@ fn variance_of_opaque(tcx: TyCtxt<'_>, item_def_id: LocalDefId) -> &[ty::Varianc
#[instrument(level = "trace", skip(self), ret)]
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
match t.kind() {
ty::Alias(_, ty::AliasTy { def_id, substs })
ty::Alias(_, ty::AliasTy { def_id, substs, .. })
if matches!(
self.tcx.def_kind(*def_id),
DefKind::OpaqueTy | DefKind::ImplTraitPlaceholder
@ -169,7 +169,7 @@ fn variance_of_opaque(tcx: TyCtxt<'_>, item_def_id: LocalDefId) -> &[ty::Varianc
}
}
ty::PredicateKind::Clause(ty::Clause::Projection(ty::ProjectionPredicate {
projection_ty: ty::AliasTy { substs, def_id: _ },
projection_ty: ty::AliasTy { substs, .. },
term,
})) => {
for subst in &substs[1..] {

2
compiler/rustc_hir_typeck/src/_match.rs
View File

@ -518,7 +518,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let substs = sig.output().walk().find_map(|arg| {
if let ty::GenericArgKind::Type(ty) = arg.unpack()
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) = *ty.kind()
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) = *ty.kind()
&& def_id == rpit_def_id
{
Some(substs)

4
compiler/rustc_hir_typeck/src/closure.rs
View File

@ -167,7 +167,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
expected_ty: Ty<'tcx>,
) -> (Option<ExpectedSig<'tcx>>, Option<ty::ClosureKind>) {
match *expected_ty.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => self
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => self
.deduce_signature_from_predicates(
self.tcx.bound_explicit_item_bounds(def_id).subst_iter_copied(self.tcx, substs),
),
@ -678,7 +678,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
get_future_output(obligation.predicate, obligation.cause.span)
})?
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => self
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => self
.tcx
.bound_explicit_item_bounds(def_id)
.subst_iter_copied(self.tcx, substs)

2
compiler/rustc_hir_typeck/src/coercion.rs
View File

@ -1805,7 +1805,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
{
let ty = <dyn AstConv<'_>>::ast_ty_to_ty(fcx, ty);
// Get the `impl Trait`'s `DefId`.
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = ty.kind()
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = ty.kind()
// Get the `impl Trait`'s `Item` so that we can get its trait bounds and
// get the `Trait`'s `DefId`.
&& let hir::ItemKind::OpaqueTy(hir::OpaqueTy { bounds, .. }) =

2
compiler/rustc_hir_typeck/src/expr.rs
View File

@ -2391,7 +2391,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
ty::Param(param_ty) => {
self.point_at_param_definition(&mut err, param_ty);
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id: _, substs: _ }) => {
ty::Alias(ty::Opaque, _) => {
self.suggest_await_on_field_access(&mut err, ident, base, base_ty.peel_refs());
}
_ => {}

2
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -716,7 +716,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
if formal_ret.has_infer_types() {
for ty in ret_ty.walk() {
if let ty::subst::GenericArgKind::Type(ty) = ty.unpack()
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = *ty.kind()
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *ty.kind()
&& let Some(def_id) = def_id.as_local()
&& self.opaque_type_origin(def_id, DUMMY_SP).is_some() {
return None;

2
compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
View File

@ -2124,7 +2124,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
}
}
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id: new_def_id, substs: _ })
ty::Alias(ty::Opaque, ty::AliasTy { def_id: new_def_id, .. })
| ty::Closure(new_def_id, _)
| ty::FnDef(new_def_id, _) => {
def_id = new_def_id;

2
compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs
View File

@ -174,7 +174,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let fn_sig = substs.as_closure().sig();
Some((DefIdOrName::DefId(def_id), fn_sig.output(), fn_sig.inputs().map_bound(|inputs| &inputs[1..])))
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
self.tcx.bound_item_bounds(def_id).subst(self.tcx, substs).iter().find_map(|pred| {
if let ty::PredicateKind::Clause(ty::Clause::Projection(proj)) = pred.kind().skip_binder()
&& Some(proj.projection_ty.def_id) == self.tcx.lang_items().fn_once_output()

2
compiler/rustc_hir_typeck/src/generator_interior/mod.rs
View File

@ -563,7 +563,7 @@ fn check_must_not_suspend_ty<'tcx>(
}
ty::Adt(def, _) => check_must_not_suspend_def(fcx.tcx, def.did(), hir_id, data),
// FIXME: support adding the attribute to TAITs
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, .. }) => {
let mut has_emitted = false;
for &(predicate, _) in fcx.tcx.explicit_item_bounds(def) {
// We only look at the `DefId`, so it is safe to skip the binder here.

2
compiler/rustc_hir_typeck/src/writeback.rs
View File

@ -546,7 +546,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
impl<'tcx> ty::TypeVisitor<'tcx> for RecursionChecker {
type BreakTy = ();
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = *t.kind() {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *t.kind() {
if def_id == self.def_id.to_def_id() {
return ControlFlow::Break(());
}

2
compiler/rustc_infer/src/infer/combine.rs
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@ -675,7 +675,7 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
// relatable.
Ok(t)
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
let s = self.relate(substs, substs)?;
Ok(if s == substs { t } else { self.infcx.tcx.mk_opaque(def_id, s) })
}

8
compiler/rustc_infer/src/infer/equate.rs
View File

@ -101,13 +101,13 @@ impl<'tcx> TypeRelation<'tcx> for Equate<'_, '_, 'tcx> {
}
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
) if a_def_id == b_def_id => {
self.fields.infcx.super_combine_tys(self, a, b)?;
}
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }))
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
if self.fields.define_opaque_types && def_id.is_local() =>
{
self.fields.obligations.extend(

6
compiler/rustc_infer/src/infer/error_reporting/mod.rs
View File

@ -339,7 +339,7 @@ pub fn unexpected_hidden_region_diagnostic<'tcx>(
impl<'tcx> InferCtxt<'tcx> {
pub fn get_impl_future_output_ty(&self, ty: Ty<'tcx>) -> Option<Ty<'tcx>> {
let (def_id, substs) = match *ty.kind() {
ty::Alias(_, ty::AliasTy { def_id, substs })
ty::Alias(_, ty::AliasTy { def_id, substs, .. })
if matches!(
self.tcx.def_kind(def_id),
DefKind::OpaqueTy | DefKind::ImplTraitPlaceholder
@ -2767,9 +2767,7 @@ impl TyCategory {
pub fn from_ty(tcx: TyCtxt<'_>, ty: Ty<'_>) -> Option<(Self, DefId)> {
match *ty.kind() {
ty::Closure(def_id, _) => Some((Self::Closure, def_id)),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) => {
Some((Self::Opaque, def_id))
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) => Some((Self::Opaque, def_id)),
ty::Generator(def_id, ..) => {
Some((Self::Generator(tcx.generator_kind(def_id).unwrap()), def_id))
}

8
compiler/rustc_infer/src/infer/error_reporting/suggest.rs
View File

@ -487,12 +487,12 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
StatementAsExpression::CorrectType
}
(
ty::Alias(ty::Opaque, ty::AliasTy { def_id: last_def_id, substs: _ }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: exp_def_id, substs: _ }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: last_def_id, .. }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: exp_def_id, .. }),
) if last_def_id == exp_def_id => StatementAsExpression::CorrectType,
(
ty::Alias(ty::Opaque, ty::AliasTy { def_id: last_def_id, substs: last_bounds }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: exp_def_id, substs: exp_bounds }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: last_def_id, substs: last_bounds, .. }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: exp_def_id, substs: exp_bounds, .. }),
) => {
debug!(
"both opaque, likely future {:?} {:?} {:?} {:?}",

8
compiler/rustc_infer/src/infer/lattice.rs
View File

@ -106,11 +106,11 @@ where
}
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
) if a_def_id == b_def_id => infcx.super_combine_tys(this, a, b),
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }))
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
if this.define_opaque_types() && def_id.is_local() =>
{
this.add_obligations(

8
compiler/rustc_infer/src/infer/nll_relate/mod.rs
View File

@ -611,8 +611,8 @@ where
(&ty::Infer(ty::TyVar(vid)), _) => self.relate_ty_var((vid, b)),
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
) if a_def_id == b_def_id => infcx.super_combine_tys(self, a, b).or_else(|err| {
self.tcx().sess.delay_span_bug(
self.delegate.span(),
@ -620,8 +620,8 @@ where
);
if a_def_id.is_local() { self.relate_opaques(a, b) } else { Err(err) }
}),
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }))
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
if def_id.is_local() =>
{
self.relate_opaques(a, b)

21
compiler/rustc_infer/src/infer/opaque_types.rs
View File

@ -66,7 +66,7 @@ impl<'tcx> InferCtxt<'tcx> {
lt_op: |lt| lt,
ct_op: |ct| ct,
ty_op: |ty| match *ty.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ })
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. })
if replace_opaque_type(def_id) =>
{
let def_span = self.tcx.def_span(def_id);
@ -106,7 +106,7 @@ impl<'tcx> InferCtxt<'tcx> {
}
let (a, b) = if a_is_expected { (a, b) } else { (b, a) };
let process = |a: Ty<'tcx>, b: Ty<'tcx>, a_is_expected| match *a.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) if def_id.is_local() => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) if def_id.is_local() => {
let def_id = def_id.expect_local();
let origin = match self.defining_use_anchor {
DefiningAnchor::Bind(_) => {
@ -149,9 +149,7 @@ impl<'tcx> InferCtxt<'tcx> {
DefiningAnchor::Bubble => self.opaque_ty_origin_unchecked(def_id, cause.span),
DefiningAnchor::Error => return None,
};
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: _ }) =
*b.kind()
{
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }) = *b.kind() {
// We could accept this, but there are various ways to handle this situation, and we don't
// want to make a decision on it right now. Likely this case is so super rare anyway, that
// no one encounters it in practice.
@ -480,7 +478,7 @@ where
substs.as_generator().resume_ty().visit_with(self);
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, ref substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, ref substs, .. }) => {
// Skip lifetime paramters that are not captures.
let variances = self.tcx.variances_of(*def_id);
@ -583,17 +581,16 @@ impl<'tcx> InferCtxt<'tcx> {
}
// Replace all other mentions of the same opaque type with the hidden type,
// as the bounds must hold on the hidden type after all.
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def_id2, substs: substs2 })
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def_id2, substs: substs2, .. })
if def_id.to_def_id() == def_id2 && substs == substs2 =>
{
hidden_ty
}
// FIXME(RPITIT): This can go away when we move to associated types
ty::Alias(ty::Projection, ty::AliasTy { def_id: def_id2, substs: substs2 })
if def_id.to_def_id() == def_id2 && substs == substs2 =>
{
hidden_ty
}
ty::Alias(
ty::Projection,
ty::AliasTy { def_id: def_id2, substs: substs2, .. },
) if def_id.to_def_id() == def_id2 && substs == substs2 => hidden_ty,
_ => ty,
},
lt_op: |lt| lt,

2
compiler/rustc_infer/src/infer/outlives/components.rs
View File

@ -130,7 +130,7 @@ fn compute_components<'tcx>(
// outlives any other lifetime, which is unsound.
// See https://github.com/rust-lang/rust/issues/84305 for
// more details.
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
out.push(Component::Opaque(def_id, substs));
},

2
compiler/rustc_infer/src/infer/outlives/obligations.rs
View File

@ -338,7 +338,7 @@ where
substs,
true,
|ty| match *ty.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => (def_id, substs),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => (def_id, substs),
_ => bug!("expected only projection types from env, not {:?}", ty),
},
);

8
compiler/rustc_infer/src/infer/sub.rs
View File

@ -131,14 +131,14 @@ impl<'tcx> TypeRelation<'tcx> for Sub<'_, '_, 'tcx> {
}
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
) if a_def_id == b_def_id => {
self.fields.infcx.super_combine_tys(self, a, b)?;
Ok(a)
}
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }))
(&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
| (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
if self.fields.define_opaque_types && def_id.is_local() =>
{
self.fields.obligations.extend(

2
compiler/rustc_lint/src/opaque_hidden_inferred_bound.rs
View File

@ -117,7 +117,7 @@ impl<'tcx> LateLintPass<'tcx> for OpaqueHiddenInferredBound {
// then we can emit a suggestion to add the bound.
let add_bound = match (proj_term.kind(), assoc_pred.kind().skip_binder()) {
(
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }),
ty::PredicateKind::Clause(ty::Clause::Trait(trait_pred)),
) => Some(AddBound {
suggest_span: cx.tcx.def_span(*def_id).shrink_to_hi(),

4
compiler/rustc_lint/src/unused.rs
View File

@ -96,7 +96,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
if let hir::ExprKind::Match(await_expr, _arms, hir::MatchSource::AwaitDesugar) = expr.kind
&& let ty = cx.typeck_results().expr_ty(&await_expr)
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id: future_def_id, substs: _ }) = ty.kind()
&& let ty::Alias(ty::Opaque, ty::AliasTy { def_id: future_def_id, .. }) = ty.kind()
&& cx.tcx.ty_is_opaque_future(ty)
// FIXME: This also includes non-async fns that return `impl Future`.
&& let async_fn_def_id = cx.tcx.parent(*future_def_id)
@ -251,7 +251,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
.map(|inner| MustUsePath::Boxed(Box::new(inner)))
}
ty::Adt(def, _) => is_def_must_use(cx, def.did(), span),
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id: def, .. }) => {
elaborate_predicates_with_span(
cx.tcx,
cx.tcx.explicit_item_bounds(def).iter().cloned(),

6
compiler/rustc_middle/src/ty/context.rs
View File

@ -2321,7 +2321,7 @@ impl<'tcx> TyCtxt<'tcx> {
/// Given a `ty`, return whether it's an `impl Future<...>`.
pub fn ty_is_opaque_future(self, ty: Ty<'_>) -> bool {
let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = ty.kind() else { return false };
let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = ty.kind() else { return false };
let future_trait = self.require_lang_item(LangItem::Future, None);
self.explicit_item_bounds(def_id).iter().any(|(predicate, _)| {
@ -2673,7 +2673,7 @@ impl<'tcx> TyCtxt<'tcx> {
#[inline]
pub fn mk_opaque(self, def_id: DefId, substs: SubstsRef<'tcx>) -> Ty<'tcx> {
self.mk_ty(Alias(ty::Opaque, ty::AliasTy { def_id, substs }))
self.mk_ty(Alias(ty::Opaque, self.mk_alias_ty(def_id, substs)))
}
pub fn mk_place_field(self, place: Place<'tcx>, f: Field, ty: Ty<'tcx>) -> Place<'tcx> {
@ -2888,7 +2888,7 @@ impl<'tcx> TyCtxt<'tcx> {
substs.collect::<Vec<_>>(),
);
let substs = self.mk_substs(substs);
ty::AliasTy { def_id, substs }
ty::AliasTy { def_id, substs, _use_mk_alias_ty_instead: () }
}
pub fn mk_bound_variable_kinds<

4
compiler/rustc_middle/src/ty/diagnostics.rs
View File

@ -457,10 +457,10 @@ impl<'tcx> TypeVisitor<'tcx> for IsSuggestableVisitor<'tcx> {
return ControlFlow::Break(());
}
Alias(Opaque, AliasTy { def_id, substs: _ }) => {
Alias(Opaque, AliasTy { def_id, .. }) => {
let parent = self.tcx.parent(*def_id);
if let hir::def::DefKind::TyAlias | hir::def::DefKind::AssocTy = self.tcx.def_kind(parent)
&& let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, substs: _ }) = self.tcx.type_of(parent).kind()
&& let Alias(Opaque, AliasTy { def_id: parent_opaque_def_id, .. }) = self.tcx.type_of(parent).kind()
&& parent_opaque_def_id == def_id
{
// Okay

3
compiler/rustc_middle/src/ty/error.rs
View File

@ -779,8 +779,7 @@ fn foo(&self) -> Self::T { String::new() }
ty: Ty<'tcx>,
) -> bool {
let assoc = self.associated_item(proj_ty.def_id);
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = *proj_ty.self_ty().kind()
{
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *proj_ty.self_ty().kind() {
let opaque_local_def_id = def_id.as_local();
let opaque_hir_ty = if let Some(opaque_local_def_id) = opaque_local_def_id {
match &self.hir().expect_item(opaque_local_def_id).kind {

2
compiler/rustc_middle/src/ty/flags.rs
View File

@ -160,7 +160,7 @@ impl FlagComputation {
self.add_projection_ty(data);
}
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: _, substs }) => {
&ty::Alias(ty::Opaque, ty::AliasTy { substs, .. }) => {
self.add_flags(TypeFlags::HAS_TY_OPAQUE);
self.add_substs(substs);
}

4
compiler/rustc_middle/src/ty/print/pretty.rs
View File

@ -728,7 +728,7 @@ pub trait PrettyPrinter<'tcx>:
}
}
ty::Placeholder(placeholder) => p!(write("Placeholder({:?})", placeholder)),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
// FIXME(eddyb) print this with `print_def_path`.
// We use verbose printing in 'NO_QUERIES' mode, to
// avoid needing to call `predicates_of`. This should
@ -743,7 +743,7 @@ pub trait PrettyPrinter<'tcx>:
let parent = self.tcx().parent(def_id);
match self.tcx().def_kind(parent) {
DefKind::TyAlias | DefKind::AssocTy => {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id: d, substs: _ }) =
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id: d, .. }) =
*self.tcx().type_of(parent).kind()
{
if d == def_id {

4
compiler/rustc_middle/src/ty/relate.rs
View File

@ -557,8 +557,8 @@ pub fn super_relate_tys<'tcx, R: TypeRelation<'tcx>>(
}
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: a_substs }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: b_substs }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, substs: a_substs, .. }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, substs: b_substs, .. }),
) if a_def_id == b_def_id => {
if relation.intercrate() {
// During coherence, opaque types should be treated as equal to each other, even if their generic params

4
compiler/rustc_middle/src/ty/sty.rs
View File

@ -1166,6 +1166,10 @@ pub struct AliasTy<'tcx> {
/// `TraitRef` containing this associated type, which is in `tcx.associated_item(def_id).container`,
/// aka. `tcx.parent(def_id)`.
pub def_id: DefId,
/// This field exists to prevent the creation of `ProjectionTy` without using
/// [TyCtxt::mk_projection_ty].
pub(super) _use_mk_alias_ty_instead: (),
}
impl<'tcx> AliasTy<'tcx> {

2
compiler/rustc_middle/src/ty/util.rs
View File

@ -825,7 +825,7 @@ impl<'tcx> TypeFolder<'tcx> for OpaqueTypeExpander<'tcx> {
}
fn fold_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx> {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) = *t.kind() {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) = *t.kind() {
self.expand_opaque_ty(def_id, substs).unwrap_or(t)
} else if t.has_opaque_types() {
t.super_fold_with(self)

2
compiler/rustc_mir_transform/src/inline.rs
View File

@ -849,7 +849,7 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {
};
let kind = match parent_ty.ty.kind() {
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
self.tcx.bound_type_of(def_id).subst(self.tcx, substs).kind()
}
kind => kind,

2
compiler/rustc_privacy/src/lib.rs
View File

@ -235,7 +235,7 @@ where
self.def_id_visitor.visit_def_id(def_id, "trait", &trait_ref)?;
}
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) => {
// Skip repeated `Opaque`s to avoid infinite recursion.
if self.visited_opaque_tys.insert(def_id) {
// The intent is to treat `impl Trait1 + Trait2` identically to

2
compiler/rustc_symbol_mangling/src/legacy.rs
View File

@ -216,7 +216,7 @@ impl<'tcx> Printer<'tcx> for &mut SymbolPrinter<'tcx> {
match *ty.kind() {
// Print all nominal types as paths (unlike `pretty_print_type`).
ty::FnDef(def_id, substs)
| ty::Alias(_, ty::AliasTy { def_id, substs })
| ty::Alias(_, ty::AliasTy { def_id, substs, .. })
| ty::Closure(def_id, substs)
| ty::Generator(def_id, substs, _) => self.print_def_path(def_id, substs),

2
compiler/rustc_symbol_mangling/src/v0.rs
View File

@ -439,7 +439,7 @@ impl<'tcx> Printer<'tcx> for &mut SymbolMangler<'tcx> {
// Mangle all nominal types as paths.
ty::Adt(ty::AdtDef(Interned(&ty::AdtDefData { did: def_id, .. }, _)), substs)
| ty::FnDef(def_id, substs)
| ty::Alias(_, ty::AliasTy { def_id, substs })
| ty::Alias(_, ty::AliasTy { def_id, substs, .. })
| ty::Closure(def_id, substs)
| ty::Generator(def_id, substs, _) => {
self = self.print_def_path(def_id, substs)?;

4
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
View File

@ -878,7 +878,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
fn_sig.inputs().map_bound(|inputs| &inputs[1..]),
))
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
self.tcx.bound_item_bounds(def_id).subst(self.tcx, substs).iter().find_map(|pred| {
if let ty::PredicateKind::Clause(ty::Clause::Projection(proj)) = pred.kind().skip_binder()
&& Some(proj.projection_ty.def_id) == self.tcx.lang_items().fn_once_output()
@ -2662,7 +2662,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
Some(ident) => err.span_note(ident.span, &msg),
None => err.note(&msg),
},
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) => {
// Avoid printing the future from `core::future::identity_future`, it's not helpful
if tcx.parent(*def_id) == identity_future {
break 'print;

2
compiler/rustc_trait_selection/src/traits/project.rs
View File

@ -496,7 +496,7 @@ impl<'a, 'b, 'tcx> TypeFolder<'tcx> for AssocTypeNormalizer<'a, 'b, 'tcx> {
// This is really important. While we *can* handle this, this has
// severe performance implications for large opaque types with
// late-bound regions. See `issue-88862` benchmark.
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs })
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. })
if !substs.has_escaping_bound_vars() =>
{
// Only normalize `impl Trait` outside of type inference, usually in codegen.

2
compiler/rustc_trait_selection/src/traits/query/normalize.rs
View File

@ -205,7 +205,7 @@ impl<'cx, 'tcx> FallibleTypeFolder<'tcx> for QueryNormalizer<'cx, 'tcx> {
// This is really important. While we *can* handle this, this has
// severe performance implications for large opaque types with
// late-bound regions. See `issue-88862` benchmark.
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs })
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. })
if !substs.has_escaping_bound_vars() =>
{
// Only normalize `impl Trait` outside of type inference, usually in codegen.

2
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
View File

@ -155,7 +155,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let placeholder_self_ty = placeholder_trait_predicate.self_ty();
let placeholder_trait_predicate = ty::Binder::dummy(placeholder_trait_predicate);
let (def_id, substs) = match *placeholder_self_ty.kind() {
ty::Alias(_, ty::AliasTy { def_id, substs }) => (def_id, substs),
ty::Alias(_, ty::AliasTy { def_id, substs, .. }) => (def_id, substs),
_ => bug!("projection candidate for unexpected type: {:?}", placeholder_self_ty),
};

4
compiler/rustc_trait_selection/src/traits/select/mod.rs
View File

@ -1595,7 +1595,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let tcx = self.infcx.tcx;
let (def_id, substs) = match *placeholder_trait_predicate.trait_ref.self_ty().kind() {
ty::Alias(_, ty::AliasTy { def_id, substs }) => (def_id, substs),
ty::Alias(_, ty::AliasTy { def_id, substs, .. }) => (def_id, substs),
_ => {
span_bug!(
obligation.cause.span,
@ -2259,7 +2259,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
t.rebind(def.all_fields().map(|f| f.ty(self.tcx(), substs)).collect())
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
// We can resolve the `impl Trait` to its concrete type,
// which enforces a DAG between the functions requiring
// the auto trait bounds in question.

2
compiler/rustc_trait_selection/src/traits/wf.rs
View File

@ -648,7 +648,7 @@ impl<'tcx> WfPredicates<'tcx> {
// types appearing in the fn signature
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
// All of the requirements on type parameters
// have already been checked for `impl Trait` in
// return position. We do need to check type-alias-impl-trait though.

4
compiler/rustc_traits/src/chalk/db.rs
View File

@ -433,7 +433,7 @@ impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'t
}
}
(
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }),
&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }),
OpaqueType(opaque_ty_id, ..),
) => def_id == opaque_ty_id.0,
(&ty::FnDef(def_id, ..), FnDef(fn_def_id, ..)) => def_id == fn_def_id.0,
@ -789,7 +789,7 @@ impl<'tcx> ty::TypeFolder<'tcx> for ReplaceOpaqueTyFolder<'tcx> {
}
fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) = *ty.kind() {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) = *ty.kind() {
if def_id == self.opaque_ty_id.0 && substs == self.identity_substs {
return self.tcx.mk_ty(ty::Bound(
self.binder_index,

24
compiler/rustc_traits/src/chalk/lowering.rs
View File

@ -347,13 +347,13 @@ impl<'tcx> LowerInto<'tcx, chalk_ir::Ty<RustInterner<'tcx>>> for Ty<'tcx> {
ty::Tuple(types) => {
chalk_ir::TyKind::Tuple(types.len(), types.as_substs().lower_into(interner))
}
ty::Alias(ty::Projection, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Projection, ty::AliasTy { def_id, substs, .. }) => {
chalk_ir::TyKind::Alias(chalk_ir::AliasTy::Projection(chalk_ir::ProjectionTy {
associated_ty_id: chalk_ir::AssocTypeId(def_id),
substitution: substs.lower_into(interner),
}))
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
chalk_ir::TyKind::Alias(chalk_ir::AliasTy::Opaque(chalk_ir::OpaqueTy {
opaque_ty_id: chalk_ir::OpaqueTyId(def_id),
substitution: substs.lower_into(interner),
@ -443,11 +443,11 @@ impl<'tcx> LowerInto<'tcx, Ty<'tcx>> for &chalk_ir::Ty<RustInterner<'tcx>> {
TyKind::Str => ty::Str,
TyKind::OpaqueType(opaque_ty, substitution) => ty::Alias(
ty::Opaque,
ty::AliasTy { def_id: opaque_ty.0, substs: substitution.lower_into(interner) },
interner.tcx.mk_alias_ty(opaque_ty.0, substitution.lower_into(interner)),
),
TyKind::AssociatedType(assoc_ty, substitution) => ty::Alias(
ty::Projection,
ty::AliasTy { substs: substitution.lower_into(interner), def_id: assoc_ty.0 },
interner.tcx.mk_alias_ty(assoc_ty.0, substitution.lower_into(interner)),
),
TyKind::Foreign(def_id) => ty::Foreign(def_id.0),
TyKind::Error => return interner.tcx.ty_error(),
@ -458,17 +458,17 @@ impl<'tcx> LowerInto<'tcx, Ty<'tcx>> for &chalk_ir::Ty<RustInterner<'tcx>> {
TyKind::Alias(alias_ty) => match alias_ty {
chalk_ir::AliasTy::Projection(projection) => ty::Alias(
ty::Projection,
ty::AliasTy {
def_id: projection.associated_ty_id.0,
substs: projection.substitution.lower_into(interner),
},
interner.tcx.mk_alias_ty(
projection.associated_ty_id.0,
projection.substitution.lower_into(interner),
),
),
chalk_ir::AliasTy::Opaque(opaque) => ty::Alias(
ty::Opaque,
ty::AliasTy {
def_id: opaque.opaque_ty_id.0,
substs: opaque.substitution.lower_into(interner),
},
interner.tcx.mk_alias_ty(
opaque.opaque_ty_id.0,
opaque.substitution.lower_into(interner),
),
),
},
TyKind::Function(_quantified_ty) => unimplemented!(),

2
src/librustdoc/clean/mod.rs
View File

@ -1835,7 +1835,7 @@ pub(crate) fn clean_middle_ty<'tcx>(
}
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs, .. }) => {
// Grab the "TraitA + TraitB" from `impl TraitA + TraitB`,
// by looking up the bounds associated with the def_id.
let bounds = cx

2
src/tools/clippy/clippy_lints/src/future_not_send.rs
View File

@ -62,7 +62,7 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend {
return;
}
let ret_ty = return_ty(cx, hir_id);
if let ty::Alias(ty::Opaque, AliasTy { def_id, substs }) = *ret_ty.kind() {
if let ty::Alias(ty::Opaque, AliasTy { def_id, substs, .. }) = *ret_ty.kind() {
let preds = cx.tcx.explicit_item_bounds(def_id);
let mut is_future = false;
for &(p, _span) in preds {

12
src/tools/clippy/clippy_utils/src/ty.rs
View File

@ -79,7 +79,7 @@ pub fn contains_ty_adt_constructor_opaque<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'
return true;
}
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) = *inner_ty.kind() {
if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *inner_ty.kind() {
for &(predicate, _span) in cx.tcx.explicit_item_bounds(def_id) {
match predicate.kind().skip_binder() {
// For `impl Trait<U>`, it will register a predicate of `T: Trait<U>`, so we go through
@ -250,7 +250,7 @@ pub fn is_must_use_ty<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
is_must_use_ty(cx, *ty)
},
ty::Tuple(substs) => substs.iter().any(|ty| is_must_use_ty(cx, ty)),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) => {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) => {
for (predicate, _) in cx.tcx.explicit_item_bounds(*def_id) {
if let ty::PredicateKind::Clause(ty::Clause::Trait(trait_predicate)) = predicate.kind().skip_binder() {
if cx.tcx.has_attr(trait_predicate.trait_ref.def_id, sym::must_use) {
@ -631,7 +631,7 @@ pub fn ty_sig<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<ExprFnSig<'t
Some(ExprFnSig::Closure(decl, subs.as_closure().sig()))
},
ty::FnDef(id, subs) => Some(ExprFnSig::Sig(cx.tcx.bound_fn_sig(id).subst(cx.tcx, subs), Some(id))),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, substs: _ }) => sig_from_bounds(cx, ty, cx.tcx.item_bounds(def_id), cx.tcx.opt_parent(def_id)),
ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) => sig_from_bounds(cx, ty, cx.tcx.item_bounds(def_id), cx.tcx.opt_parent(def_id)),
ty::FnPtr(sig) => Some(ExprFnSig::Sig(sig, None)),
ty::Dynamic(bounds, _, _) => {
let lang_items = cx.tcx.lang_items();
@ -1039,10 +1039,10 @@ pub fn make_projection<'tcx>(
}
}
Some(AliasTy {
Some(tcx.mk_alias_ty(
assoc_item.def_id,
substs,
def_id: assoc_item.def_id,
})
))
}
helper(
tcx,