Rename object_safety to dyn_compatibility

Up to a trait implemented by another package, linking to
$CARGO_HOME/registry/cache/index.crates.io-6f17d22bba15001f/

crates/hir-ty/src/chalk_db.rs

@@ -382,8 +382,9 @@ impl chalk_solve::RustIrDatabase<Interner> for ChalkContext<'_> {
  }
 
  fn is_object_safe(&self, trait_id: chalk_ir::TraitId<Interner>) -> bool {
+ // FIXME: When cargo is updated, change to dyn_compatibility
  let trait_ = from_chalk_trait_id(trait_id);
- crate::object_safety::object_safety(self.db, trait_).is_none()
+ crate::dyn_compatibility::dyn_compatibility(self.db, trait_).is_none()
  }
 
  fn closure_kind(

crates/hir-ty/src/db.rs

@@ -20,11 +20,11 @@ use triomphe::Arc;
 use crate::{
  chalk_db,
  consteval::ConstEvalError,
+ dyn_compatibility::DynCompatibilityViolation,
  layout::{Layout, LayoutError},
  lower::{GenericDefaults, GenericPredicates},
  method_resolution::{InherentImpls, TraitImpls, TyFingerprint},
  mir::{BorrowckResult, MirBody, MirLowerError},
- object_safety::ObjectSafetyViolation,
  Binders, ClosureId, Const, FnDefId, ImplTraitId, ImplTraits, InferenceResult, Interner,
  PolyFnSig, Substitution, TraitEnvironment, TraitRef, Ty, TyDefId, ValueTyDefId,
 };
@@ -108,8 +108,8 @@ pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> {
  #[salsa::invoke(crate::layout::target_data_layout_query)]
  fn target_data_layout(&self, krate: CrateId) -> Result<Arc<TargetDataLayout>, Arc<str>>;
 
- #[salsa::invoke(crate::object_safety::object_safety_of_trait_query)]
- fn object_safety_of_trait(&self, trait_: TraitId) -> Option<ObjectSafetyViolation>;
+ #[salsa::invoke(crate::dyn_compatibility::dyn_compatibility_of_trait_query)]
+ fn dyn_compatibility_of_trait(&self, trait_: TraitId) -> Option<DynCompatibilityViolation>;
 
  #[salsa::invoke(crate::lower::ty_query)]
  #[salsa::cycle(crate::lower::ty_recover)]
@@ -280,8 +280,8 @@ pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> {
 }
 
 #[test]
-fn hir_database_is_object_safe() {
- fn _assert_object_safe(_: &dyn HirDatabase) {}
+fn hir_database_is_dyn_compatible() {
+ fn _assert_dyn_compatible(_: &dyn HirDatabase) {}
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]

crates/hir-ty/src/object_safety.rs → crates/hir-ty/src/dyn_compatibility.rs

@@ -1,4 +1,4 @@
-//! Compute the object-safety of a trait
+//! Compute the dyn-compatibility of a trait
 
 use std::ops::ControlFlow;
 
@@ -28,7 +28,7 @@ use crate::{
 };
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum ObjectSafetyViolation {
+pub enum DynCompatibilityViolation {
  SizedSelf,
  SelfReferential,
  Method(FunctionId, MethodViolationCode),
@@ -50,70 +50,73 @@ pub enum MethodViolationCode {
  UndispatchableReceiver,
 }
 
-pub fn object_safety(db: &dyn HirDatabase, trait_: TraitId) -> Option<ObjectSafetyViolation> {
+pub fn dyn_compatibility(
+ db: &dyn HirDatabase,
+ trait_: TraitId,
+) -> Option<DynCompatibilityViolation> {
  for super_trait in all_super_traits(db.upcast(), trait_).into_iter().skip(1).rev() {
- if db.object_safety_of_trait(super_trait).is_some() {
- return Some(ObjectSafetyViolation::HasNonSafeSuperTrait(super_trait));
+ if db.dyn_compatibility_of_trait(super_trait).is_some() {
+ return Some(DynCompatibilityViolation::HasNonSafeSuperTrait(super_trait));
  }
  }
 
- db.object_safety_of_trait(trait_)
+ db.dyn_compatibility_of_trait(trait_)
 }
 
-pub fn object_safety_with_callback<F>(
+pub fn dyn_compatibility_with_callback<F>(
  db: &dyn HirDatabase,
  trait_: TraitId,
  cb: &mut F,
 ) -> ControlFlow<()>
 where
- F: FnMut(ObjectSafetyViolation) -> ControlFlow<()>,
+ F: FnMut(DynCompatibilityViolation) -> ControlFlow<()>,
 {
  for super_trait in all_super_traits(db.upcast(), trait_).into_iter().skip(1).rev() {
- if db.object_safety_of_trait(super_trait).is_some() {
- cb(ObjectSafetyViolation::HasNonSafeSuperTrait(trait_))?;
+ if db.dyn_compatibility_of_trait(super_trait).is_some() {
+ cb(DynCompatibilityViolation::HasNonSafeSuperTrait(trait_))?;
  }
  }
 
- object_safety_of_trait_with_callback(db, trait_, cb)
+ dyn_compatibility_of_trait_with_callback(db, trait_, cb)
 }
 
-pub fn object_safety_of_trait_with_callback<F>(
+pub fn dyn_compatibility_of_trait_with_callback<F>(
  db: &dyn HirDatabase,
  trait_: TraitId,
  cb: &mut F,
 ) -> ControlFlow<()>
 where
- F: FnMut(ObjectSafetyViolation) -> ControlFlow<()>,
+ F: FnMut(DynCompatibilityViolation) -> ControlFlow<()>,
 {
  // Check whether this has a `Sized` bound
  if generics_require_sized_self(db, trait_.into()) {
- cb(ObjectSafetyViolation::SizedSelf)?;
+ cb(DynCompatibilityViolation::SizedSelf)?;
  }
 
  // Check if there exist bounds that referencing self
  if predicates_reference_self(db, trait_) {
- cb(ObjectSafetyViolation::SelfReferential)?;
+ cb(DynCompatibilityViolation::SelfReferential)?;
  }
  if bounds_reference_self(db, trait_) {
- cb(ObjectSafetyViolation::SelfReferential)?;
+ cb(DynCompatibilityViolation::SelfReferential)?;
  }
 
  // rustc checks for non-lifetime binders here, but we don't support HRTB yet
 
  let trait_data = db.trait_data(trait_);
  for (_, assoc_item) in &trait_data.items {
- object_safety_violation_for_assoc_item(db, trait_, *assoc_item, cb)?;
+ dyn_compatibility_violation_for_assoc_item(db, trait_, *assoc_item, cb)?;
  }
 
  ControlFlow::Continue(())
 }
 
-pub fn object_safety_of_trait_query(
+pub fn dyn_compatibility_of_trait_query(
  db: &dyn HirDatabase,
  trait_: TraitId,
-) -> Option<ObjectSafetyViolation> {
+) -> Option<DynCompatibilityViolation> {
  let mut res = None;
- object_safety_of_trait_with_callback(db, trait_, &mut |osv| {
+ dyn_compatibility_of_trait_with_callback(db, trait_, &mut |osv| {
  res = Some(osv);
  ControlFlow::Break(())
  });
@@ -321,14 +324,14 @@ fn contains_illegal_self_type_reference<T: TypeVisitable<Interner>>(
  t.visit_with(visitor.as_dyn(), outer_binder).is_break()
 }
 
-fn object_safety_violation_for_assoc_item<F>(
+fn dyn_compatibility_violation_for_assoc_item<F>(
  db: &dyn HirDatabase,
  trait_: TraitId,
  item: AssocItemId,
  cb: &mut F,
 ) -> ControlFlow<()>
 where
- F: FnMut(ObjectSafetyViolation) -> ControlFlow<()>,
+ F: FnMut(DynCompatibilityViolation) -> ControlFlow<()>,
 {
  // Any item that has a `Self : Sized` requisite is otherwise
  // exempt from the regulations.
@@ -337,10 +340,10 @@ where
  }
 
  match item {
- AssocItemId::ConstId(it) => cb(ObjectSafetyViolation::AssocConst(it)),
+ AssocItemId::ConstId(it) => cb(DynCompatibilityViolation::AssocConst(it)),
  AssocItemId::FunctionId(it) => {
  virtual_call_violations_for_method(db, trait_, it, &mut |mvc| {
- cb(ObjectSafetyViolation::Method(it, mvc))
+ cb(DynCompatibilityViolation::Method(it, mvc))
  })
  }
  AssocItemId::TypeAliasId(it) => {
@@ -350,7 +353,7 @@ where
  } else {
  let generic_params = db.generic_params(item.into());
  if !generic_params.is_empty() {
- cb(ObjectSafetyViolation::GAT(it))
+ cb(DynCompatibilityViolation::GAT(it))
  } else {
  ControlFlow::Continue(())
  }
@@ -469,7 +472,7 @@ fn receiver_is_dispatchable(
  return false;
  };
 
- // `self: Self` can't be dispatched on, but this is already considered object safe.
+ // `self: Self` can't be dispatched on, but this is already considered dyn compatible
  // See rustc's comment on https://github.com/rust-lang/rust/blob/3f121b9461cce02a703a0e7e450568849dfaa074/compiler/rustc_trait_selection/src/traits/object_safety.rs#L433-L437
  if sig
  .skip_binders()