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Convert adt_sized_constraint to early-binder, use list

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This commit is contained in:
Michael Goulet 2023-08-01 00:52:16 +00:00
parent abd3637e42
commit 8696fa71b3
5 changed files with 12 additions and 9 deletions
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2
compiler/rustc_middle/src/query/mod.rs
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@ -706,7 +706,7 @@
separate_provide_extern
}
query adt_sized_constraint(key: DefId) -> &'tcx [Ty<'tcx>] {
query adt_sized_constraint(key: DefId) -> ty::EarlyBinder<&'tcx ty::List<Ty<'tcx>>> {
desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
}

4
compiler/rustc_middle/src/ty/adt.rs
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@ -572,8 +572,8 @@ pub fn destructor(self, tcx: TyCtxt<'tcx>) -> Option<Destructor> {
///
/// 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::bind(tcx.adt_sized_constraint(self.did()))
pub fn sized_constraint(self, tcx: TyCtxt<'tcx>) -> ty::EarlyBinder<&'tcx ty::List<Ty<'tcx>>> {
tcx.adt_sized_constraint(self.did())
}
}

2
compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs
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@ -150,7 +150,7 @@ pub(in crate::solve) fn instantiate_constituent_tys_for_sized_trait<'tcx>(
ty::Adt(def, args) => {
let sized_crit = def.sized_constraint(ecx.tcx());
Ok(sized_crit.iter_instantiated_copied(ecx.tcx(), args).collect())
Ok(sized_crit.iter_instantiated(ecx.tcx(), args).collect())
}
}
}

2
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -2099,7 +2099,7 @@ fn sized_conditions(
Where(
obligation
.predicate
.rebind(sized_crit.iter_instantiated_copied(self.tcx(), args).collect()),
.rebind(sized_crit.iter_instantiated(self.tcx(), args).collect()),
)
}

11
compiler/rustc_ty_utils/src/ty.rs
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@ -42,7 +42,7 @@ fn sized_constraint_for_ty<'tcx>(
let adt_tys = adt.sized_constraint(tcx);
debug!("sized_constraint_for_ty({:?}) intermediate = {:?}", ty, adt_tys);
adt_tys
.iter_instantiated_copied(tcx, args)
.iter_instantiated(tcx, args)
.flat_map(|ty| sized_constraint_for_ty(tcx, adtdef, ty))
.collect()
}
@ -92,10 +92,13 @@ fn defaultness(tcx: TyCtxt<'_>, def_id: LocalDefId) -> hir::Defaultness {
/// - a tuple of type parameters or projections, if there are multiple
/// such.
/// - an Error, if a type is infinitely sized
fn adt_sized_constraint(tcx: TyCtxt<'_>, def_id: DefId) -> &[Ty<'_>] {
fn adt_sized_constraint<'tcx>(
tcx: TyCtxt<'tcx>,
def_id: DefId,
) -> ty::EarlyBinder<&'tcx ty::List<Ty<'tcx>>> {
if let Some(def_id) = def_id.as_local() {
if matches!(tcx.representability(def_id), ty::Representability::Infinite) {
return tcx.mk_type_list(&[Ty::new_misc_error(tcx)]);
return ty::EarlyBinder::bind(tcx.mk_type_list(&[Ty::new_misc_error(tcx)]));
}
}
let def = tcx.adt_def(def_id);
@ -107,7 +110,7 @@ fn adt_sized_constraint(tcx: TyCtxt<'_>, def_id: DefId) -> &[Ty<'_>] {
debug!("adt_sized_constraint: {:?} => {:?}", def, result);
result
ty::EarlyBinder::bind(result)
}
/// See `ParamEnv` struct definition for details.