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Auto merge of #112006 - kylematsuda:earlybinder-private, r=jackh726

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Make `EarlyBinder`'s inner value private

Currently, `EarlyBinder(T)`'s inner value is public, which allows implicitly skipping the binder by indexing into the tuple struct (i.e., `x.0`). `@lcnr` suggested making `EarlyBinder`'s inner value private so users are required to explicitly call `skip_binder` (https://github.com/rust-lang/rust/issues/105779#issuecomment-1549933424) .

This PR makes the inner value private, adds `EarlyBinder::new` for constructing a new instance, and replaces uses of `x.0` with `x.skip_binder()` (or similar). It also adds some documentation to `EarlyBinder::skip_binder` explaining how to skip the binder of `&EarlyBinder<T>` to get `&T` now that the inner value is private (since previously we could just do `&x.0`).

r? `@lcnr`
This commit is contained in:
bors 2023-05-28 18:04:53 +00:00
commit 1c53407e8c
56 changed files with 123 additions and 113 deletions
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2
compiler/rustc_codegen_cranelift/src/common.rs
View File

@ -361,7 +361,7 @@ impl<'tcx> FunctionCx<'_, '_, 'tcx> {
self.instance.subst_mir_and_normalize_erasing_regions(
self.tcx,
ty::ParamEnv::reveal_all(),
ty::EarlyBinder(value),
ty::EarlyBinder::new(value),
)
}

2
compiler/rustc_codegen_llvm/src/debuginfo/create_scope_map.rs
View File

@ -93,7 +93,7 @@ fn make_mir_scope<'ll, 'tcx>(
let callee = cx.tcx.subst_and_normalize_erasing_regions(
instance.substs,
ty::ParamEnv::reveal_all(),
ty::EarlyBinder(callee),
ty::EarlyBinder::new(callee),
);
let callee_fn_abi = cx.fn_abi_of_instance(callee, ty::List::empty());
cx.dbg_scope_fn(callee, callee_fn_abi, None)

2
compiler/rustc_codegen_ssa/src/mir/mod.rs
View File

@ -111,7 +111,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
self.instance.subst_mir_and_normalize_erasing_regions(
self.cx.tcx(),
ty::ParamEnv::reveal_all(),
ty::EarlyBinder(value),
ty::EarlyBinder::new(value),
)
}
}

2
compiler/rustc_const_eval/src/interpret/eval_context.rs
View File

@ -497,7 +497,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
.try_subst_mir_and_normalize_erasing_regions(
*self.tcx,
self.param_env,
ty::EarlyBinder(value),
ty::EarlyBinder::new(value),
)
.map_err(|_| err_inval!(TooGeneric))
}

2
compiler/rustc_hir_analysis/src/astconv/mod.rs
View File

@ -1278,7 +1278,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
// params (and trait ref's late bound params). This logic is very similar to
// `Predicate::subst_supertrait`, and it's no coincidence why.
let shifted_output = tcx.shift_bound_var_indices(num_bound_vars, output);
let subst_output = ty::EarlyBinder(shifted_output).subst(tcx, substs);
let subst_output = ty::EarlyBinder::new(shifted_output).subst(tcx, substs);
let bound_vars = tcx.late_bound_vars(binding.hir_id);
ty::Binder::bind_with_vars(subst_output, bound_vars)

4
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View File

@ -794,14 +794,14 @@ pub(super) fn collect_return_position_impl_trait_in_trait_tys<'tcx>(
})
});
debug!(%ty);
collected_tys.insert(def_id, ty::EarlyBinder(ty));
collected_tys.insert(def_id, ty::EarlyBinder::new(ty));
}
Err(err) => {
let reported = tcx.sess.delay_span_bug(
return_span,
format!("could not fully resolve: {ty} => {err:?}"),
);
collected_tys.insert(def_id, ty::EarlyBinder(tcx.ty_error(reported)));
collected_tys.insert(def_id, ty::EarlyBinder::new(tcx.ty_error(reported)));
}
}
}

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

@ -128,7 +128,7 @@ fn ensure_drop_predicates_are_implied_by_item_defn<'tcx>(
// We don't need to normalize this param-env or anything, since we're only
// substituting it with free params, so no additional param-env normalization
// can occur on top of what has been done in the param_env query itself.
let param_env = ty::EarlyBinder(tcx.param_env(adt_def_id))
let param_env = ty::EarlyBinder::new(tcx.param_env(adt_def_id))
.subst(tcx, adt_to_impl_substs)
.with_constness(tcx.constness(drop_impl_def_id));

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

@ -1398,7 +1398,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
}
let mut param_count = CountParams::default();
let has_region = pred.visit_with(&mut param_count).is_break();
let substituted_pred = ty::EarlyBinder(pred).subst(tcx, substs);
let substituted_pred = ty::EarlyBinder::new(pred).subst(tcx, substs);
// Don't check non-defaulted params, dependent defaults (including lifetimes)
// or preds with multiple params.
if substituted_pred.has_non_region_param() || param_count.params.len() > 1 || has_region

4
compiler/rustc_hir_analysis/src/collect.rs
View File

@ -1124,7 +1124,7 @@ fn fn_sig(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<ty::PolyFnSig<
bug!("unexpected sort of node in fn_sig(): {:?}", x);
}
};
ty::EarlyBinder(output)
ty::EarlyBinder::new(output)
}
fn infer_return_ty_for_fn_sig<'tcx>(
@ -1312,7 +1312,7 @@ fn impl_trait_ref(
check_impl_constness(tcx, impl_.constness, ast_trait_ref),
)
})
.map(ty::EarlyBinder)
.map(ty::EarlyBinder::new)
}
fn check_impl_constness(

4
compiler/rustc_hir_analysis/src/collect/item_bounds.rs
View File

@ -86,7 +86,7 @@ pub(super) fn explicit_item_bounds(
Some(ty::ImplTraitInTraitData::Trait { opaque_def_id, .. }) => {
let item = tcx.hir().get_by_def_id(opaque_def_id.expect_local()).expect_item();
let opaque_ty = item.expect_opaque_ty();
return ty::EarlyBinder(opaque_type_bounds(
return ty::EarlyBinder::new(opaque_type_bounds(
tcx,
opaque_def_id.expect_local(),
opaque_ty.bounds,
@ -124,7 +124,7 @@ pub(super) fn explicit_item_bounds(
}
_ => bug!("item_bounds called on {:?}", def_id),
};
ty::EarlyBinder(bounds)
ty::EarlyBinder::new(bounds)
}
pub(super) fn item_bounds(

4
compiler/rustc_hir_analysis/src/collect/type_of.rs
View File

@ -323,7 +323,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<Ty
return map[&assoc_item.trait_item_def_id.unwrap()];
}
Err(_) => {
return ty::EarlyBinder(tcx.ty_error_with_message(
return ty::EarlyBinder::new(tcx.ty_error_with_message(
DUMMY_SP,
"Could not collect return position impl trait in trait tys",
));
@ -497,7 +497,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<Ty
bug!("unexpected sort of node in type_of(): {:?}", x);
}
};
ty::EarlyBinder(output)
ty::EarlyBinder::new(output)
}
fn infer_placeholder_type<'a>(

2
compiler/rustc_hir_analysis/src/outlives/explicit.rs
View File

@ -68,7 +68,7 @@ impl<'tcx> ExplicitPredicatesMap<'tcx> {
}
}
ty::EarlyBinder(required_predicates)
ty::EarlyBinder::new(required_predicates)
})
}
}

13
compiler/rustc_hir_analysis/src/outlives/implicit_infer.rs
View File

@ -68,12 +68,13 @@ pub(super) fn infer_predicates(
// Therefore mark `predicates_added` as true and which will ensure
// we walk the crates again and re-calculate predicates for all
// items.
let item_predicates_len: usize =
global_inferred_outlives.get(&item_did.to_def_id()).map_or(0, |p| p.0.len());
let item_predicates_len: usize = global_inferred_outlives
.get(&item_did.to_def_id())
.map_or(0, |p| p.as_ref().skip_binder().len());
if item_required_predicates.len() > item_predicates_len {
predicates_added = true;
global_inferred_outlives
.insert(item_did.to_def_id(), ty::EarlyBinder(item_required_predicates));
.insert(item_did.to_def_id(), ty::EarlyBinder::new(item_required_predicates));
}
}
@ -137,7 +138,9 @@ fn insert_required_predicates_to_be_wf<'tcx>(
// 'a` holds for `Foo`.
debug!("Adt");
if let Some(unsubstituted_predicates) = global_inferred_outlives.get(&def.did()) {
for (unsubstituted_predicate, &span) in &unsubstituted_predicates.0 {
for (unsubstituted_predicate, &span) in
unsubstituted_predicates.as_ref().skip_binder()
{
// `unsubstituted_predicate` is `U: 'b` in the
// example above. So apply the substitution to
// get `T: 'a` (or `predicate`):
@ -251,7 +254,7 @@ fn check_explicit_predicates<'tcx>(
);
let explicit_predicates = explicit_map.explicit_predicates_of(tcx, def_id);
for (outlives_predicate, &span) in &explicit_predicates.0 {
for (outlives_predicate, &span) in explicit_predicates.as_ref().skip_binder() {
debug!("outlives_predicate = {:?}", &outlives_predicate);
// Careful: If we are inferring the effects of a `dyn Trait<..>`

37
compiler/rustc_hir_analysis/src/outlives/mod.rs
View File

@ -98,24 +98,27 @@ fn inferred_outlives_crate(tcx: TyCtxt<'_>, (): ()) -> CratePredicatesMap<'_> {
let predicates = global_inferred_outlives
.iter()
.map(|(&def_id, set)| {
let predicates = &*tcx.arena.alloc_from_iter(set.0.iter().filter_map(
|(ty::OutlivesPredicate(kind1, region2), &span)| {
match kind1.unpack() {
GenericArgKind::Type(ty1) => Some((
ty::Clause::TypeOutlives(ty::OutlivesPredicate(ty1, *region2)),
span,
)),
GenericArgKind::Lifetime(region1) => Some((
ty::Clause::RegionOutlives(ty::OutlivesPredicate(region1, *region2)),
span,
)),
GenericArgKind::Const(_) => {
// Generic consts don't impose any constraints.
None
let predicates =
&*tcx.arena.alloc_from_iter(set.as_ref().skip_binder().iter().filter_map(
|(ty::OutlivesPredicate(kind1, region2), &span)| {
match kind1.unpack() {
GenericArgKind::Type(ty1) => Some((
ty::Clause::TypeOutlives(ty::OutlivesPredicate(ty1, *region2)),
span,
)),
GenericArgKind::Lifetime(region1) => Some((
ty::Clause::RegionOutlives(ty::OutlivesPredicate(
region1, *region2,
)),
span,
)),
GenericArgKind::Const(_) => {
// Generic consts don't impose any constraints.
None
}
}
}
},
));
},
));
(def_id, predicates)
})
.collect();

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

@ -1386,7 +1386,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// the referenced item.
let ty = tcx.type_of(def_id);
assert!(!substs.has_escaping_bound_vars());
assert!(!ty.0.has_escaping_bound_vars());
assert!(!ty.skip_binder().has_escaping_bound_vars());
let ty_substituted = self.normalize(span, ty.subst(tcx, substs));
if let Some(UserSelfTy { impl_def_id, self_ty }) = user_self_ty {

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

@ -293,7 +293,7 @@ impl<'cx, 'tcx> VerifyBoundCx<'cx, 'tcx> {
) -> impl Iterator<Item = ty::Region<'tcx>> {
let tcx = self.tcx;
let bounds = tcx.item_bounds(alias_ty.def_id);
trace!("{:#?}", bounds.0);
trace!("{:#?}", bounds.skip_binder());
bounds
.subst_iter(tcx, alias_ty.substs)
.filter_map(|p| p.to_opt_type_outlives())

2
compiler/rustc_metadata/src/rmeta/decoder.rs
View File

@ -851,7 +851,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
} else {
tcx.arena.alloc_from_iter(lazy.decode((self, tcx)))
};
ty::EarlyBinder(&*output)
ty::EarlyBinder::new(&*output)
}
fn get_variant(

2
compiler/rustc_metadata/src/rmeta/encoder.rs
View File

@ -1727,7 +1727,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
ty::Closure(_, substs) => {
let constness = self.tcx.constness(def_id.to_def_id());
self.tables.constness.set_some(def_id.to_def_id().index, constness);
record!(self.tables.fn_sig[def_id.to_def_id()] <- ty::EarlyBinder(substs.as_closure().sig()));
record!(self.tables.fn_sig[def_id.to_def_id()] <- ty::EarlyBinder::new(substs.as_closure().sig()));
}
_ => bug!("closure that is neither generator nor closure"),

2
compiler/rustc_middle/src/mir/mod.rs
View File

@ -476,7 +476,7 @@ impl<'tcx> Body<'tcx> {
/// Returns the return type; it always return first element from `local_decls` array.
#[inline]
pub fn bound_return_ty(&self) -> ty::EarlyBinder<Ty<'tcx>> {
ty::EarlyBinder(self.local_decls[RETURN_PLACE].ty)
ty::EarlyBinder::new(self.local_decls[RETURN_PLACE].ty)
}
/// Gets the location of the terminator for the given block.

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

@ -573,7 +573,7 @@ impl<'tcx> AdtDef<'tcx> {
/// Due to normalization being eager, this applies even if
/// the associated type is behind a pointer (e.g., issue #31299).
pub fn sized_constraint(self, tcx: TyCtxt<'tcx>) -> ty::EarlyBinder<&'tcx [Ty<'tcx>]> {
ty::EarlyBinder(tcx.adt_sized_constraint(self.did()))
ty::EarlyBinder::new(tcx.adt_sized_constraint(self.did()))
}
}

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

@ -254,5 +254,5 @@ pub fn const_param_default(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBind
"`const_param_default` expected a generic parameter with a constant"
),
};
ty::EarlyBinder(Const::from_anon_const(tcx, default_def_id))
ty::EarlyBinder::new(Const::from_anon_const(tcx, default_def_id))
}

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

@ -343,7 +343,7 @@ impl<'tcx> GenericPredicates<'tcx> {
substs: SubstsRef<'tcx>,
) -> impl Iterator<Item = (Predicate<'tcx>, Span)> + DoubleEndedIterator + ExactSizeIterator
{
EarlyBinder(self.predicates).subst_iter_copied(tcx, substs)
EarlyBinder::new(self.predicates).subst_iter_copied(tcx, substs)
}
#[instrument(level = "debug", skip(self, tcx))]
@ -358,7 +358,7 @@ impl<'tcx> GenericPredicates<'tcx> {
}
instantiated
.predicates
.extend(self.predicates.iter().map(|(p, _)| EarlyBinder(*p).subst(tcx, substs)));
.extend(self.predicates.iter().map(|(p, _)| EarlyBinder::new(*p).subst(tcx, substs)));
instantiated.spans.extend(self.predicates.iter().map(|(_, sp)| *sp));
}

4
compiler/rustc_middle/src/ty/inhabitedness/inhabited_predicate.rs
View File

@ -158,7 +158,7 @@ impl<'tcx> InhabitedPredicate<'tcx> {
fn subst_opt(self, tcx: TyCtxt<'tcx>, substs: ty::SubstsRef<'tcx>) -> Option<Self> {
match self {
Self::ConstIsZero(c) => {
let c = ty::EarlyBinder(c).subst(tcx, substs);
let c = ty::EarlyBinder::new(c).subst(tcx, substs);
let pred = match c.kind().try_to_target_usize(tcx) {
Some(0) => Self::True,
Some(1..) => Self::False,
@ -167,7 +167,7 @@ impl<'tcx> InhabitedPredicate<'tcx> {
Some(pred)
}
Self::GenericType(t) => {
Some(ty::EarlyBinder(t).subst(tcx, substs).inhabited_predicate(tcx))
Some(ty::EarlyBinder::new(t).subst(tcx, substs).inhabited_predicate(tcx))
}
Self::And(&[a, b]) => match a.subst_opt(tcx, substs) {
None => b.subst_opt(tcx, substs).map(|b| a.and(tcx, b)),

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

@ -764,7 +764,7 @@ impl<'tcx> Predicate<'tcx> {
let shifted_pred =
tcx.shift_bound_var_indices(trait_bound_vars.len(), bound_pred.skip_binder());
// 2) Self: Bar1<'a, '^0.1> -> T: Bar1<'^0.0, '^0.1>
let new = EarlyBinder(shifted_pred).subst(tcx, trait_ref.skip_binder().substs);
let new = EarlyBinder::new(shifted_pred).subst(tcx, trait_ref.skip_binder().substs);
// 3) ['x] + ['b] -> ['x, 'b]
let bound_vars =
tcx.mk_bound_variable_kinds_from_iter(trait_bound_vars.iter().chain(pred_bound_vars));

2
compiler/rustc_middle/src/ty/print/mod.rs
View File

@ -123,7 +123,7 @@ pub trait Printer<'tcx>: Sized {
impl_trait_ref.map(|i| i.subst(self.tcx(), substs)),
)
} else {
(self_ty.0, impl_trait_ref.map(|i| i.0))
(self_ty.subst_identity(), impl_trait_ref.map(|i| i.subst_identity()))
};
self.print_impl_path(def_id, substs, self_ty, impl_trait_ref)
}

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

@ -568,7 +568,7 @@ impl<'tcx> GeneratorSubsts<'tcx> {
let layout = tcx.generator_layout(def_id).unwrap();
layout.variant_fields.iter().map(move |variant| {
variant.iter().map(move |field| {
ty::EarlyBinder(layout.field_tys[*field].ty).subst(tcx, self.substs)
ty::EarlyBinder::new(layout.field_tys[*field].ty).subst(tcx, self.substs)
})
})
}
@ -2366,7 +2366,7 @@ impl<'tcx> Ty<'tcx> {
ty::Tuple(tys) => tys.iter().all(|ty| ty.is_trivially_sized(tcx)),
ty::Adt(def, _substs) => def.sized_constraint(tcx).0.is_empty(),
ty::Adt(def, _substs) => def.sized_constraint(tcx).skip_binder().is_empty(),
ty::Alias(..) | ty::Param(_) | ty::Placeholder(..) => false,

9
compiler/rustc_middle/src/ty/subst.rs
View File

@ -538,13 +538,17 @@ impl<'tcx, T: TypeVisitable<TyCtxt<'tcx>>> TypeVisitable<TyCtxt<'tcx>> for &'tcx
/// [`subst_identity`](EarlyBinder::subst_identity) or [`skip_binder`](EarlyBinder::skip_binder).
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[derive(Encodable, Decodable, HashStable)]
pub struct EarlyBinder<T>(pub T);
pub struct EarlyBinder<T>(T);
/// For early binders, you should first call `subst` before using any visitors.
impl<'tcx, T> !TypeFoldable<TyCtxt<'tcx>> for ty::EarlyBinder<T> {}
impl<'tcx, T> !TypeVisitable<TyCtxt<'tcx>> for ty::EarlyBinder<T> {}
impl<T> EarlyBinder<T> {
pub fn new(inner: T) -> EarlyBinder<T> {
EarlyBinder(inner)
}
pub fn as_ref(&self) -> EarlyBinder<&T> {
EarlyBinder(&self.0)
}
@ -582,6 +586,9 @@ impl<T> EarlyBinder<T> {
/// arguments of an `FnSig`). Otherwise, consider using
/// [`subst_identity`](EarlyBinder::subst_identity).
///
/// To skip the binder on `x: &EarlyBinder<T>` to obtain `&T`, leverage
/// [`EarlyBinder::as_ref`](EarlyBinder::as_ref): `x.as_ref().skip_binder()`.
///
/// See also [`Binder::skip_binder`](super::Binder::skip_binder), which is
/// the analogous operation on [`super::Binder`].
pub fn skip_binder(self) -> T {

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

@ -709,7 +709,7 @@ impl<'tcx> TyCtxt<'tcx> {
.as_ref()
.map_or_else(|| [].iter(), |l| l.field_tys.iter())
.filter(|decl| !decl.ignore_for_traits)
.map(|decl| ty::EarlyBinder(decl.ty))
.map(|decl| ty::EarlyBinder::new(decl.ty))
}
/// Normalizes all opaque types in the given value, replacing them

4
compiler/rustc_middle/src/values.rs
View File

@ -96,13 +96,13 @@ impl<'tcx> Value<TyCtxt<'tcx>, DepKind> for Representability {
impl<'tcx> Value<TyCtxt<'tcx>, DepKind> for ty::EarlyBinder<Ty<'_>> {
fn from_cycle_error(tcx: TyCtxt<'tcx>, cycle: &[QueryInfo<DepKind>]) -> Self {
ty::EarlyBinder(Ty::from_cycle_error(tcx, cycle))
ty::EarlyBinder::new(Ty::from_cycle_error(tcx, cycle))
}
}
impl<'tcx> Value<TyCtxt<'tcx>, DepKind> for ty::EarlyBinder<ty::Binder<'_, ty::FnSig<'_>>> {
fn from_cycle_error(tcx: TyCtxt<'tcx>, cycle: &[QueryInfo<DepKind>]) -> Self {
ty::EarlyBinder(ty::Binder::from_cycle_error(tcx, cycle))
ty::EarlyBinder::new(ty::Binder::from_cycle_error(tcx, cycle))
}
}

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

@ -83,7 +83,7 @@ impl<'tcx> FunctionItemRefChecker<'_, 'tcx> {
// If the inner type matches the type bound by `Pointer`
if inner_ty == bound_ty {
// Do a substitution using the parameters from the callsite
let subst_ty = EarlyBinder(inner_ty).subst(self.tcx, substs_ref);
let subst_ty = EarlyBinder::new(inner_ty).subst(self.tcx, substs_ref);
if let Some((fn_id, fn_substs)) =
FunctionItemRefChecker::is_fn_ref(subst_ty)
{

8
compiler/rustc_mir_transform/src/inline.rs
View File

@ -192,7 +192,7 @@ impl<'tcx> Inliner<'tcx> {
let Ok(callee_body) = callsite.callee.try_subst_mir_and_normalize_erasing_regions(
self.tcx,
self.param_env,
ty::EarlyBinder(callee_body.clone()),
ty::EarlyBinder::new(callee_body.clone()),
) else {
return Err("failed to normalize callee body");
};
@ -455,7 +455,7 @@ impl<'tcx> Inliner<'tcx> {
// If the place doesn't actually need dropping, treat it like a regular goto.
let ty = callsite
.callee
.subst_mir(self.tcx, ty::EarlyBinder(&place.ty(callee_body, tcx).ty));
.subst_mir(self.tcx, ty::EarlyBinder::new(&place.ty(callee_body, tcx).ty));
if ty.needs_drop(tcx, self.param_env) && let UnwindAction::Cleanup(unwind) = unwind {
work_list.push(unwind);
}
@ -790,7 +790,7 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {
// If the place doesn't actually need dropping, treat it like a regular goto.
let ty = self
.instance
.subst_mir(tcx, ty::EarlyBinder(&place.ty(self.callee_body, tcx).ty));
.subst_mir(tcx, ty::EarlyBinder::new(&place.ty(self.callee_body, tcx).ty));
if ty.needs_drop(tcx, self.param_env) {
self.cost += CALL_PENALTY;
if let UnwindAction::Cleanup(_) = unwind {
@ -801,7 +801,7 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {
}
}
TerminatorKind::Call { func: Operand::Constant(ref f), unwind, .. } => {
let fn_ty = self.instance.subst_mir(tcx, ty::EarlyBinder(&f.literal.ty()));
let fn_ty = self.instance.subst_mir(tcx, ty::EarlyBinder::new(&f.literal.ty()));
self.cost += if let ty::FnDef(def_id, _) = *fn_ty.kind() && tcx.is_intrinsic(def_id) {
// Don't give intrinsics the extra penalty for calls
INSTR_COST

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

@ -47,7 +47,7 @@ pub(crate) fn mir_callgraph_reachable<'tcx>(
let Ok(substs) = caller.try_subst_mir_and_normalize_erasing_regions(
tcx,
param_env,
ty::EarlyBinder(substs),
ty::EarlyBinder::new(substs),
) else {
trace!(?caller, ?param_env, ?substs, "cannot normalize, skipping");
continue;

9
compiler/rustc_mir_transform/src/shim.rs
View File

@ -69,7 +69,7 @@ fn make_shim<'tcx>(tcx: TyCtxt<'tcx>, instance: ty::InstanceDef<'tcx>) -> Body<'
// of this function. Is this intentional?
if let Some(ty::Generator(gen_def_id, substs, _)) = ty.map(Ty::kind) {
let body = tcx.optimized_mir(*gen_def_id).generator_drop().unwrap();
let body = EarlyBinder(body.clone()).subst(tcx, substs);
let body = EarlyBinder::new(body.clone()).subst(tcx, substs);
debug!("make_shim({:?}) = {:?}", instance, body);
return body;
}
@ -644,8 +644,11 @@ fn build_call_shim<'tcx>(
let sig = sig.map_bound(|sig| tcx.erase_late_bound_regions(sig));
assert_eq!(sig_substs.is_some(), !instance.has_polymorphic_mir_body());
let mut sig =
if let Some(sig_substs) = sig_substs { sig.subst(tcx, &sig_substs) } else { sig.0 };
let mut sig = if let Some(sig_substs) = sig_substs {
sig.subst(tcx, &sig_substs)
} else {
sig.skip_binder()
};
if let CallKind::Indirect(fnty) = call_kind {
// `sig` determines our local decls, and thus the callee type in the `Call` terminator. This

2
compiler/rustc_monomorphize/src/collector.rs
View File

@ -677,7 +677,7 @@ impl<'a, 'tcx> MirNeighborCollector<'a, 'tcx> {
self.instance.subst_mir_and_normalize_erasing_regions(
self.tcx,
ty::ParamEnv::reveal_all(),
ty::EarlyBinder(value),
ty::EarlyBinder::new(value),
)
}
}

4
compiler/rustc_monomorphize/src/util.rs
View File

@ -29,12 +29,12 @@ pub(crate) fn dump_closure_profile<'tcx>(tcx: TyCtxt<'tcx>, closure_instance: In
let before_feature_tys = tcx.subst_and_normalize_erasing_regions(
closure_instance.substs,
param_env,
ty::EarlyBinder(before_feature_tys),
ty::EarlyBinder::new(before_feature_tys),
);
let after_feature_tys = tcx.subst_and_normalize_erasing_regions(
closure_instance.substs,
param_env,
ty::EarlyBinder(after_feature_tys),
ty::EarlyBinder::new(after_feature_tys),
);
let new_size = tcx

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

@ -274,7 +274,7 @@ impl<'tcx> Printer<'tcx> for &mut SymbolMangler<'tcx> {
let mut param_env = self.tcx.param_env_reveal_all_normalized(impl_def_id);
if !substs.is_empty() {
param_env = EarlyBinder(param_env).subst(self.tcx, substs);
param_env = EarlyBinder::new(param_env).subst(self.tcx, substs);
}
match &mut impl_trait_ref {

6
compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs
View File

@ -148,11 +148,7 @@ pub(in crate::solve) fn instantiate_constituent_tys_for_sized_trait<'tcx>(
ty::Adt(def, substs) => {
let sized_crit = def.sized_constraint(ecx.tcx());
Ok(sized_crit
.0
.iter()
.map(|ty| sized_crit.rebind(*ty).subst(ecx.tcx(), substs))
.collect())
Ok(sized_crit.subst_iter_copied(ecx.tcx(), substs).collect())
}
}
}

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

@ -487,7 +487,7 @@ fn is_impossible_method(tcx: TyCtxt<'_>, (impl_def_id, trait_item_def_id): (DefI
tcx,
ObligationCause::dummy_with_span(*span),
param_env,
ty::EarlyBinder(*pred).subst(tcx, impl_trait_ref.substs),
ty::EarlyBinder::new(*pred).subst(tcx, impl_trait_ref.substs),
)
})
});

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

@ -642,7 +642,7 @@ fn receiver_for_self_ty<'tcx>(
if param.index == 0 { self_ty.into() } else { tcx.mk_param_from_def(param) }
});
let result = EarlyBinder(receiver_ty).subst(tcx, substs);
let result = EarlyBinder::new(receiver_ty).subst(tcx, substs);
debug!(
"receiver_for_self_ty({:?}, {:?}, {:?}) = {:?}",
receiver_ty, self_ty, method_def_id, result

6
compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs
View File

@ -307,13 +307,13 @@ pub fn dtorck_constraint_for_ty_inner<'tcx>(
// there, but that needs some way to handle cycles.
constraints
.dtorck_types
.extend(dtorck_types.iter().map(|t| EarlyBinder(*t).subst(tcx, substs)));
.extend(dtorck_types.iter().map(|t| EarlyBinder::new(*t).subst(tcx, substs)));
constraints
.outlives
.extend(outlives.iter().map(|t| EarlyBinder(*t).subst(tcx, substs)));
.extend(outlives.iter().map(|t| EarlyBinder::new(*t).subst(tcx, substs)));
constraints
.overflows
.extend(overflows.iter().map(|t| EarlyBinder(*t).subst(tcx, substs)));
.extend(overflows.iter().map(|t| EarlyBinder::new(*t).subst(tcx, substs)));
}
// Objects must be alive in order for their destructor

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

@ -360,7 +360,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// consider a "quick reject". This avoids creating more types
// and so forth that we need to.
let impl_trait_ref = self.tcx().impl_trait_ref(impl_def_id).unwrap();
if !drcx.substs_refs_may_unify(obligation_substs, impl_trait_ref.0.substs) {
if !drcx
.substs_refs_may_unify(obligation_substs, impl_trait_ref.skip_binder().substs)
{
return;
}
if self.reject_fn_ptr_impls(

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

@ -527,9 +527,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
substs.extend(trait_predicate.trait_ref.substs.iter());
let mut bound_vars: smallvec::SmallVec<[ty::BoundVariableKind; 8]> =
smallvec::SmallVec::with_capacity(
bound.0.kind().bound_vars().len() + defs.count(),
bound.skip_binder().kind().bound_vars().len() + defs.count(),
);
bound_vars.extend(bound.0.kind().bound_vars().into_iter());
bound_vars.extend(bound.skip_binder().kind().bound_vars().into_iter());
InternalSubsts::fill_single(&mut substs, defs, &mut |param, _| match param
.kind
{

12
compiler/rustc_trait_selection/src/traits/select/mod.rs
View File

@ -2149,13 +2149,11 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
ty::Adt(def, substs) => {
let sized_crit = def.sized_constraint(self.tcx());
// (*) binder moved here
Where(obligation.predicate.rebind({
sized_crit
.0
.iter()
.map(|ty| sized_crit.rebind(*ty).subst(self.tcx(), substs))
.collect()
}))
Where(
obligation
.predicate
.rebind(sized_crit.subst_iter_copied(self.tcx(), substs).collect()),
)
}
ty::Alias(..) | ty::Param(_) | ty::Placeholder(..) => None,

2
compiler/rustc_traits/src/chalk/db.rs
View File

@ -294,7 +294,7 @@ impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'t
};
Arc::new(chalk_solve::rust_ir::FnDefDatum {
id: fn_def_id,
sig: sig.0.lower_into(self.interner),
sig: sig.skip_binder().lower_into(self.interner),
binders: chalk_ir::Binders::new(binders, bound),
})
}

2
compiler/rustc_ty_utils/src/assoc.rs
View File

@ -301,7 +301,7 @@ fn associated_type_for_impl_trait_in_trait(
trait_assoc_ty.impl_defaultness(tcx.impl_defaultness(fn_def_id));
// Copy type_of of the opaque.
trait_assoc_ty.type_of(ty::EarlyBinder(tcx.mk_opaque(
trait_assoc_ty.type_of(ty::EarlyBinder::new(tcx.mk_opaque(
opaque_ty_def_id.to_def_id(),
InternalSubsts::identity_for_item(tcx, opaque_ty_def_id),
)));

2
compiler/rustc_ty_utils/src/consts.rs
View File

@ -419,7 +419,7 @@ pub fn thir_abstract_const(
let root_span = body.exprs[body_id].span;
Ok(Some(ty::EarlyBinder(recurse_build(tcx, body, body_id, root_span)?)))
Ok(Some(ty::EarlyBinder::new(recurse_build(tcx, body, body_id, root_span)?)))
}
pub fn provide(providers: &mut Providers) {

2
compiler/rustc_ty_utils/src/layout.rs
View File

@ -610,7 +610,7 @@ fn generator_layout<'tcx>(
) -> Result<Layout<'tcx>, LayoutError<'tcx>> {
use SavedLocalEligibility::*;
let tcx = cx.tcx;
let subst_field = |ty: Ty<'tcx>| EarlyBinder(ty).subst(tcx, substs);
let subst_field = |ty: Ty<'tcx>| EarlyBinder::new(ty).subst(tcx, substs);
let Some(info) = tcx.generator_layout(def_id) else {
return Err(LayoutError::Unknown(ty));

2
compiler/rustc_ty_utils/src/needs_drop.rs
View File

@ -210,7 +210,7 @@ fn drop_tys_helper<'tcx>(
match subty.kind() {
ty::Adt(adt_id, subst) => {
for subty in tcx.adt_drop_tys(adt_id.did())? {
vec.push(EarlyBinder(subty).subst(tcx, subst));
vec.push(EarlyBinder::new(subty).subst(tcx, subst));
}
}
_ => vec.push(subty),

6
compiler/rustc_ty_utils/src/ty.rs
View File

@ -44,9 +44,7 @@ fn sized_constraint_for_ty<'tcx>(
let adt_tys = adt.sized_constraint(tcx);
debug!("sized_constraint_for_ty({:?}) intermediate = {:?}", ty, adt_tys);
adt_tys
.0
.iter()
.map(|ty| adt_tys.rebind(*ty).subst(tcx, substs))
.subst_iter_copied(tcx, substs)
.flat_map(|ty| sized_constraint_for_ty(tcx, adtdef, ty))
.collect()
}
@ -508,7 +506,7 @@ fn issue33140_self_ty(tcx: TyCtxt<'_>, def_id: DefId) -> Option<EarlyBinder<Ty<'
if self_ty_matches {
debug!("issue33140_self_ty - MATCHES!");
Some(EarlyBinder(self_ty))
Some(EarlyBinder::new(self_ty))
} else {
debug!("issue33140_self_ty - non-matching self type");
None

14
src/librustdoc/clean/blanket_impl.rs
View File

@ -21,7 +21,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
let mut impls = Vec::new();
for trait_def_id in cx.tcx.all_traits() {
if !cx.cache.effective_visibilities.is_reachable(cx.tcx, trait_def_id)
|| cx.generated_synthetics.get(&(ty.0, trait_def_id)).is_some()
|| cx.generated_synthetics.get(&(ty.skip_binder(), trait_def_id)).is_some()
{
continue;
}
@ -34,13 +34,13 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
impl_def_id
);
let trait_ref = cx.tcx.impl_trait_ref(impl_def_id).unwrap();
if !matches!(trait_ref.0.self_ty().kind(), ty::Param(_)) {
if !matches!(trait_ref.skip_binder().self_ty().kind(), ty::Param(_)) {
continue;
}
let infcx = cx.tcx.infer_ctxt().build();
let substs = infcx.fresh_substs_for_item(DUMMY_SP, item_def_id);
let impl_ty = ty.subst(infcx.tcx, substs);
let param_env = EarlyBinder(param_env).subst(infcx.tcx, substs);
let param_env = EarlyBinder::new(param_env).subst(infcx.tcx, substs);
let impl_substs = infcx.fresh_substs_for_item(DUMMY_SP, impl_def_id);
let impl_trait_ref = trait_ref.subst(infcx.tcx, impl_substs);
@ -87,7 +87,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
trait_ref, ty
);
cx.generated_synthetics.insert((ty.0, trait_def_id));
cx.generated_synthetics.insert((ty.skip_binder(), trait_def_id));
impls.push(Item {
name: None,
@ -104,10 +104,10 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
// the post-inference `trait_ref`, as it's more accurate.
trait_: Some(clean_trait_ref_with_bindings(
cx,
ty::Binder::dummy(trait_ref.0),
ty::Binder::dummy(trait_ref.skip_binder()),
ThinVec::new(),
)),
for_: clean_middle_ty(ty::Binder::dummy(ty.0), cx, None),
for_: clean_middle_ty(ty::Binder::dummy(ty.skip_binder()), cx, None),
items: cx
.tcx
.associated_items(impl_def_id)
@ -116,7 +116,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
.collect::<Vec<_>>(),
polarity: ty::ImplPolarity::Positive,
kind: ImplKind::Blanket(Box::new(clean_middle_ty(
ty::Binder::dummy(trait_ref.0.self_ty()),
ty::Binder::dummy(trait_ref.skip_binder().self_ty()),
cx,
None,
))),

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

@ -1219,7 +1219,7 @@ fn needless_borrow_impl_arg_position<'tcx>(
return false;
}
let predicate = EarlyBinder(predicate).subst(cx.tcx, &substs_with_referent_ty);
let predicate = EarlyBinder::new(predicate).subst(cx.tcx, &substs_with_referent_ty);
let obligation = Obligation::new(cx.tcx, ObligationCause::dummy(), cx.param_env, predicate);
let infcx = cx.tcx.infer_ctxt().build();
infcx.predicate_must_hold_modulo_regions(&obligation)

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

@ -243,7 +243,7 @@ fn get_ufcs_type_name<'tcx>(cx: &LateContext<'tcx>, method_def_id: DefId, substs
| ty::Ref(..)
| ty::Slice(_)
| ty::Tuple(_) => {
format!("<{}>", EarlyBinder(ty).subst(cx.tcx, substs))
format!("<{}>", EarlyBinder::new(ty).subst(cx.tcx, substs))
},
_ => ty.to_string(),
}

2
src/tools/clippy/clippy_lints/src/methods/needless_collect.rs
View File

@ -241,7 +241,7 @@ fn is_contains_sig(cx: &LateContext<'_>, call_id: HirId, iter_expr: &Expr<'_>) -
&& let proj_ty = cx.tcx.mk_projection(iter_item.def_id, substs)
&& let Ok(item_ty) = cx.tcx.try_normalize_erasing_regions(cx.param_env, proj_ty)
{
item_ty == EarlyBinder(search_ty).subst(cx.tcx, cx.typeck_results().node_substs(call_id))
item_ty == EarlyBinder::new(search_ty).subst(cx.tcx, cx.typeck_results().node_substs(call_id))
} else {
false
}

4
src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs
View File

@ -428,7 +428,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
}));
if trait_predicates.any(|predicate| {
let predicate = EarlyBinder(predicate).subst(cx.tcx, new_subst);
let predicate = EarlyBinder::new(predicate).subst(cx.tcx, new_subst);
let obligation = Obligation::new(cx.tcx, ObligationCause::dummy(), cx.param_env, predicate);
!cx.tcx.infer_ctxt().build().predicate_must_hold_modulo_regions(&obligation)
}) {
@ -438,7 +438,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
let output_ty = fn_sig.output();
if output_ty.contains(*param_ty) {
if let Ok(new_ty) = cx.tcx.try_subst_and_normalize_erasing_regions(
new_subst, cx.param_env, EarlyBinder(output_ty)) {
new_subst, cx.param_env, EarlyBinder::new(output_ty)) {
expr = parent_expr;
ty = new_ty;
continue;

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

@ -138,7 +138,7 @@ fn collect_unsafe_exprs<'tcx>(
.type_dependent_def_id(expr.hir_id)
.map(|def_id| cx.tcx.fn_sig(def_id))
{
if sig.0.unsafety() == Unsafety::Unsafe {
if sig.skip_binder().unsafety() == Unsafety::Unsafe {
unsafe_ops.push(("unsafe method call occurs here", expr.span));
}
}

2
src/tools/clippy/clippy_utils/src/consts.rs
View File

@ -462,7 +462,7 @@ impl<'a, 'tcx> ConstEvalLateContext<'a, 'tcx> {
let substs = if self.substs.is_empty() {
substs
} else {
EarlyBinder(substs).subst(self.lcx.tcx, self.substs)
EarlyBinder::new(substs).subst(self.lcx.tcx, self.substs)
};
let result = self