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Remove an impl_polarity call where the information is already available in the header

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This commit is contained in:
Oli Scherer 2024-02-13 10:15:29 +00:00
parent 75de6cf9a3
commit 251c33ce2a
1 changed files with 23 additions and 16 deletions
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39
compiler/rustc_hir_analysis/src/coherence/builtin.rs
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@ -33,11 +33,15 @@ pub fn check_trait<'tcx>(
) -> Result<(), ErrorGuaranteed> {
let lang_items = tcx.lang_items();
let checker = Checker { tcx, trait_def_id, impl_def_id };
let mut res = checker.check(lang_items.drop_trait(), visit_implementation_of_drop);
res = res.and(checker.check(lang_items.copy_trait(), visit_implementation_of_copy));
res = res.and(
checker.check(lang_items.const_param_ty_trait(), visit_implementation_of_const_param_ty),
);
let mut res = checker.check(lang_items.drop_trait(), |tcx, id| {
visit_implementation_of_drop(tcx, id, impl_header)
});
res = res.and(checker.check(lang_items.copy_trait(), |tcx, id| {
visit_implementation_of_copy(tcx, id, impl_header)
}));
res = res.and(checker.check(lang_items.const_param_ty_trait(), |tcx, id| {
visit_implementation_of_const_param_ty(tcx, id, impl_header)
}));
res = res.and(
checker.check(lang_items.coerce_unsized_trait(), visit_implementation_of_coerce_unsized),
);
@ -62,12 +66,13 @@ impl<'tcx> Checker<'tcx> {
}
}
fn visit_implementation_of_drop(
tcx: TyCtxt<'_>,
fn visit_implementation_of_drop<'tcx>(
tcx: TyCtxt<'tcx>,
impl_did: LocalDefId,
header: ty::ImplTraitHeader<'tcx>,
) -> Result<(), ErrorGuaranteed> {
// Destructors only work on local ADT types.
match tcx.type_of(impl_did).instantiate_identity().kind() {
match header.trait_ref.self_ty().kind() {
ty::Adt(def, _) if def.did().is_local() => return Ok(()),
ty::Error(_) => return Ok(()),
_ => {}
@ -78,13 +83,14 @@ fn visit_implementation_of_drop(
Err(tcx.dcx().emit_err(errors::DropImplOnWrongItem { span: impl_.self_ty.span }))
}
fn visit_implementation_of_copy(
tcx: TyCtxt<'_>,
fn visit_implementation_of_copy<'tcx>(
tcx: TyCtxt<'tcx>,
impl_did: LocalDefId,
impl_header: ty::ImplTraitHeader<'tcx>,
) -> Result<(), ErrorGuaranteed> {
debug!("visit_implementation_of_copy: impl_did={:?}", impl_did);
let self_type = tcx.type_of(impl_did).instantiate_identity();
let self_type = impl_header.trait_ref.self_ty();
debug!("visit_implementation_of_copy: self_type={:?} (bound)", self_type);
let param_env = tcx.param_env(impl_did);
@ -92,7 +98,7 @@ fn visit_implementation_of_copy(
debug!("visit_implementation_of_copy: self_type={:?} (free)", self_type);
if let ty::ImplPolarity::Negative = tcx.impl_polarity(impl_did) {
if let ty::ImplPolarity::Negative = impl_header.polarity {
return Ok(());
}
@ -114,16 +120,17 @@ fn visit_implementation_of_copy(
}
}
fn visit_implementation_of_const_param_ty(
tcx: TyCtxt<'_>,
fn visit_implementation_of_const_param_ty<'tcx>(
tcx: TyCtxt<'tcx>,
impl_did: LocalDefId,
header: ty::ImplTraitHeader<'tcx>,
) -> Result<(), ErrorGuaranteed> {
let self_type = tcx.type_of(impl_did).instantiate_identity();
let self_type = header.trait_ref.self_ty();
assert!(!self_type.has_escaping_bound_vars());
let param_env = tcx.param_env(impl_did);
if let ty::ImplPolarity::Negative = tcx.impl_polarity(impl_did) {
if let ty::ImplPolarity::Negative = header.polarity {
return Ok(());
}