bjoernager/rust
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Remap impl-trait lifetimes on HIR instead of AST lowering.

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This commit is contained in:
Camille GILLOT 2024-08-20 00:48:43 +00:00
parent 298c7462c3
commit b6e1214ac0
35 changed files with 508 additions and 597 deletions
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40
compiler/rustc_resolve/src/late.rs
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@ -841,10 +841,9 @@ impl<'ra: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'_, 'ast, 'r
self.r.record_partial_res(ty.id, PartialRes::new(res));
visit::walk_ty(self, ty)
}
TyKind::ImplTrait(node_id, _) => {
TyKind::ImplTrait(_, _) => {
let candidates = self.lifetime_elision_candidates.take();
visit::walk_ty(self, ty);
self.record_lifetime_params_for_impl_trait(*node_id);
self.lifetime_elision_candidates = candidates;
}
TyKind::TraitObject(bounds, ..) => {
@ -977,14 +976,6 @@ impl<'ra: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'_, 'ast, 'r
sig.decl.inputs.iter().map(|Param { ty, .. }| (None, &**ty)),
&sig.decl.output,
);
if let Some((coro_node_id, _)) = sig
.header
.coroutine_kind
.map(|coroutine_kind| coroutine_kind.return_id())
{
this.record_lifetime_params_for_impl_trait(coro_node_id);
}
},
);
return;
@ -1026,10 +1017,6 @@ impl<'ra: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'_, 'ast, 'r
.map(|Param { pat, ty, .. }| (Some(&**pat), &**ty)),
&declaration.output,
);
if let Some((async_node_id, _)) = coro_node_id {
this.record_lifetime_params_for_impl_trait(async_node_id);
}
},
);
@ -1220,7 +1207,6 @@ impl<'ra: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'_, 'ast, 'r
}
},
AssocItemConstraintKind::Bound { ref bounds } => {
self.record_lifetime_params_for_impl_trait(constraint.id);
walk_list!(self, visit_param_bound, bounds, BoundKind::Bound);
}
}
@ -4795,30 +4781,6 @@ impl<'a, 'ast, 'ra: 'ast, 'tcx> LateResolutionVisitor<'a, 'ast, 'ra, 'tcx> {
)
}
/// Construct the list of in-scope lifetime parameters for impl trait lowering.
/// We include all lifetime parameters, either named or "Fresh".
/// The order of those parameters does not matter, as long as it is
/// deterministic.
fn record_lifetime_params_for_impl_trait(&mut self, impl_trait_node_id: NodeId) {
let mut extra_lifetime_params = vec![];
for rib in self.lifetime_ribs.iter().rev() {
extra_lifetime_params
.extend(rib.bindings.iter().map(|(&ident, &(node_id, res))| (ident, node_id, res)));
match rib.kind {
LifetimeRibKind::Item => break,
LifetimeRibKind::AnonymousCreateParameter { binder, .. } => {
if let Some(earlier_fresh) = self.r.extra_lifetime_params_map.get(&binder) {
extra_lifetime_params.extend(earlier_fresh);
}
}
_ => {}
}
}
self.r.extra_lifetime_params_map.insert(impl_trait_node_id, extra_lifetime_params);
}
fn resolve_and_cache_rustdoc_path(&mut self, path_str: &str, ns: Namespace) -> Option<Res> {
// FIXME: This caching may be incorrect in case of multiple `macro_rules`
// items with the same name in the same module.