bjoernager/rust
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Typecheck dyn* coercions

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Also changes things to treat dyn* as a sized type, unlike dyn Trait.
This commit is contained in:
Eric Holk 2022-04-13 16:38:16 -07:00
parent 6c01273a15
commit 7fccac3ea0
11 changed files with 148 additions and 29 deletions
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4
compiler/rustc_trait_selection/src/traits/object_safety.rs
View file

@ -20,8 +20,8 @@ use rustc_hir::def_id::DefId;
use rustc_middle::ty::abstract_const::{walk_abstract_const, AbstractConst};
use rustc_middle::ty::subst::{GenericArg, InternalSubsts, Subst};
use rustc_middle::ty::{
self, EarlyBinder, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitor,
TraitObjectRepresentation,
self, EarlyBinder, TraitObjectRepresentation, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable,
TypeVisitor,
};
use rustc_middle::ty::{Predicate, ToPredicate};
use rustc_session::lint::builtin::WHERE_CLAUSES_OBJECT_SAFETY;

2
compiler/rustc_trait_selection/src/traits/select/mod.rs
View file

@ -38,6 +38,7 @@ use rustc_middle::ty::fold::BottomUpFolder;
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_middle::ty::relate::TypeRelation;
use rustc_middle::ty::subst::{Subst, SubstsRef};
use rustc_middle::ty::TraitObjectRepresentation;
use rustc_middle::ty::{self, EarlyBinder, PolyProjectionPredicate, ToPolyTraitRef, ToPredicate};
use rustc_middle::ty::{Ty, TyCtxt, TypeFoldable, TypeVisitable};
use rustc_span::symbol::sym;
@ -1865,6 +1866,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
| ty::Array(..)
| ty::Closure(..)
| ty::Never
| ty::Dynamic(_, _, TraitObjectRepresentation::Sized)
| ty::Error(_) => {
// safe for everything
Where(ty::Binder::dummy(Vec::new()))