bjoernager/rust
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resolve: Revert "Set effective visibilities for imports more precisely"

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This commit is contained in:
Vadim Petrochenkov 2022-10-19 17:56:41 +04:00
parent d7dd01fe8b
commit ba4834c092
4 changed files with 26 additions and 36 deletions
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26
compiler/rustc_resolve/src/access_levels.rs
View file

@ -1,5 +1,4 @@
use crate::NameBindingKind;
use crate::Resolver;
use crate::{ImportKind, NameBindingKind, Resolver};
use rustc_ast::ast;
use rustc_ast::visit;
use rustc_ast::visit::Visitor;
@ -45,14 +44,13 @@ impl<'r, 'a> AccessLevelsVisitor<'r, 'a> {
let module = self.r.get_module(module_id.to_def_id()).unwrap();
let resolutions = self.r.resolutions(module);
for (key, name_resolution) in resolutions.borrow().iter() {
for (_, name_resolution) in resolutions.borrow().iter() {
if let Some(mut binding) = name_resolution.borrow().binding() && !binding.is_ambiguity() {
// Set the given binding access level to `AccessLevel::Public` and
// sets the rest of the `use` chain to `AccessLevel::Exported` until
// we hit the actual exported item.
// FIXME: tag and is_public() condition must be deleted,
// but assertion fail occurs in import_id_for_ns
// FIXME: tag and is_public() condition should be removed, but assertions occur.
let tag = if binding.is_import() { AccessLevel::Exported } else { AccessLevel::Public };
if binding.vis.is_public() {
let mut prev_parent_id = module_id;
@ -60,16 +58,26 @@ impl<'r, 'a> AccessLevelsVisitor<'r, 'a> {
while let NameBindingKind::Import { binding: nested_binding, import, .. } =
binding.kind
{
let id = self.r.local_def_id(self.r.import_id_for_ns(import, key.ns));
self.update(
id,
let mut update = |node_id| self.update(
self.r.local_def_id(node_id),
binding.vis.expect_local(),
prev_parent_id,
level,
);
// In theory all the import IDs have individual visibilities and effective
// visibilities, but in practice these IDs go straigth to HIR where all
// their few uses assume that their (effective) visibility applies to the
// whole syntactic `use` item. So we update them all to the maximum value
// among the potential individual effective visibilities. Maybe HIR for
// imports shouldn't use three IDs at all.
update(import.id);
if let ImportKind::Single { additional_ids, .. } = import.kind {
update(additional_ids.0);
update(additional_ids.1);
}
level = AccessLevel::Exported;
prev_parent_id = id;
prev_parent_id = self.r.local_def_id(import.id);
binding = nested_binding;
}
}

27
compiler/rustc_resolve/src/imports.rs
View file

@ -2,7 +2,7 @@
use crate::diagnostics::{import_candidates, Suggestion};
use crate::Determinacy::{self, *};
use crate::Namespace::{self, *};
use crate::Namespace::*;
use crate::{module_to_string, names_to_string, ImportSuggestion};
use crate::{AmbiguityKind, BindingKey, ModuleKind, ResolutionError, Resolver, Segment};
use crate::{Finalize, Module, ModuleOrUniformRoot, ParentScope, PerNS, ScopeSet};
@ -371,31 +371,6 @@ impl<'a> Resolver<'a> {
self.used_imports.insert(import.id);
}
}
/// Take primary and additional node IDs from an import and select one that corresponds to the
/// given namespace. The logic must match the corresponding logic from `fn lower_use_tree` that
/// assigns resolutons to IDs.
pub(crate) fn import_id_for_ns(&self, import: &Import<'_>, ns: Namespace) -> NodeId {
if let ImportKind::Single { additional_ids: (id1, id2), .. } = import.kind {
if let Some(resolutions) = self.import_res_map.get(&import.id) {
assert!(resolutions[ns].is_some(), "incorrectly finalized import");
return match ns {
TypeNS => import.id,
ValueNS => match resolutions.type_ns {
Some(_) => id1,
None => import.id,
},
MacroNS => match (resolutions.type_ns, resolutions.value_ns) {
(Some(_), Some(_)) => id2,
(Some(_), None) | (None, Some(_)) => id1,
(None, None) => import.id,
},
};
}
}
import.id
}
}
/// An error that may be transformed into a diagnostic later. Used to combine multiple unresolved