bjoernager/rust
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Replace RPITIT current impl with new strategy that lowers as a GAT

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This commit is contained in:
Santiago Pastorino 2023-06-24 00:00:08 -03:00
parent d1389b9b48
commit 20429af7a3
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GPG key ID: 8131A24E0C79EFAF
146 changed files with 1106 additions and 586 deletions
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31
compiler/rustc_metadata/src/rmeta/encoder.rs
View file

@ -824,7 +824,6 @@ fn should_encode_span(def_kind: DefKind) -> bool {
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Field
| DefKind::Impl { .. }
| DefKind::Closure
@ -867,7 +866,6 @@ fn should_encode_attrs(def_kind: DefKind) -> bool {
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::LifetimeParam
| DefKind::GlobalAsm
| DefKind::Generator => false,
@ -902,7 +900,6 @@ fn should_encode_expn_that_defined(def_kind: DefKind) -> bool {
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Field
| DefKind::LifetimeParam
| DefKind::GlobalAsm
@ -939,7 +936,6 @@ fn should_encode_visibility(def_kind: DefKind) -> bool {
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::GlobalAsm
| DefKind::Impl { .. }
| DefKind::Closure
@ -966,7 +962,6 @@ fn should_encode_stability(def_kind: DefKind) -> bool {
| DefKind::ForeignMod
| DefKind::TyAlias
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Enum
| DefKind::Union
| DefKind::Impl { .. }
@ -1033,7 +1028,6 @@ fn should_encode_variances(def_kind: DefKind) -> bool {
| DefKind::Enum
| DefKind::Variant
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Fn
| DefKind::Ctor(..)
| DefKind::AssocFn => true,
@ -1083,7 +1077,6 @@ fn should_encode_generics(def_kind: DefKind) -> bool {
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Impl { .. }
| DefKind::Field
| DefKind::TyParam
@ -1134,19 +1127,6 @@ fn should_encode_type(tcx: TyCtxt<'_>, def_id: LocalDefId, def_kind: DefKind) ->
}
}
DefKind::ImplTraitPlaceholder => {
let parent_def_id = tcx.impl_trait_in_trait_parent_fn(def_id.to_def_id());
let assoc_item = tcx.associated_item(parent_def_id);
match assoc_item.container {
// Always encode an RPIT in an impl fn, since it always has a body
ty::AssocItemContainer::ImplContainer => true,
ty::AssocItemContainer::TraitContainer => {
// Encode an RPIT for a trait only if the trait has a default body
assoc_item.defaultness(tcx).has_value()
}
}
}
DefKind::AssocTy => {
let assoc_item = tcx.associated_item(def_id);
match assoc_item.container {
@ -1192,7 +1172,6 @@ fn should_encode_fn_sig(def_kind: DefKind) -> bool {
| DefKind::Ctor(..)
| DefKind::TyAlias
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::ForeignTy
| DefKind::Impl { .. }
| DefKind::AssocConst
@ -1235,7 +1214,6 @@ fn should_encode_constness(def_kind: DefKind) -> bool {
| DefKind::TyAlias
| DefKind::OpaqueTy
| DefKind::Impl { of_trait: false }
| DefKind::ImplTraitPlaceholder
| DefKind::ForeignTy
| DefKind::Generator
| DefKind::ConstParam
@ -1268,7 +1246,6 @@ fn should_encode_const(def_kind: DefKind) -> bool {
| DefKind::Static(..)
| DefKind::TyAlias
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::ForeignTy
| DefKind::Impl { .. }
| DefKind::AssocFn
@ -1289,11 +1266,8 @@ fn should_encode_const(def_kind: DefKind) -> bool {
}
}
// We only encode impl trait in trait when using `lower-impl-trait-in-trait-to-assoc-ty` unstable
// option.
fn should_encode_fn_impl_trait_in_trait<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool {
if tcx.lower_impl_trait_in_trait_to_assoc_ty()
&& let Some(assoc_item) = tcx.opt_associated_item(def_id)
if let Some(assoc_item) = tcx.opt_associated_item(def_id)
&& assoc_item.container == ty::AssocItemContainer::TraitContainer
&& assoc_item.kind == ty::AssocKind::Fn
{
@ -1447,9 +1421,6 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
.is_type_alias_impl_trait
.set(def_id.index, self.tcx.is_type_alias_impl_trait(def_id));
}
if let DefKind::ImplTraitPlaceholder = def_kind {
self.encode_explicit_item_bounds(def_id);
}
if tcx.impl_method_has_trait_impl_trait_tys(def_id)
&& let Ok(table) = self.tcx.collect_return_position_impl_trait_in_trait_tys(def_id)
{

1
compiler/rustc_metadata/src/rmeta/table.rs
View file

@ -142,7 +142,6 @@ fixed_size_enum! {
( AnonConst )
( InlineConst )
( OpaqueTy )
( ImplTraitPlaceholder )
( Field )
( LifetimeParam )
( GlobalAsm )