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avoid clone path prefix when lowering to hir

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Signed-off-by: SparrowLii <liyuan179@huawei.com>
This commit is contained in:
SparrowLii 2023-07-19 11:19:33 +08:00
parent 6f65ef5717
commit c6f0a7c3c3
2 changed files with 0 additions and 21 deletions
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11
compiler/rustc_ast_lowering/src/item.rs
View File

@ -551,17 +551,6 @@ fn lower_use_tree(
for &(ref use_tree, id) in trees {
let new_hir_id = self.local_def_id(id);
let mut prefix = prefix.clone();
// Give the segments new node-ids since they are being cloned.
for seg in &mut prefix.segments {
// Give the cloned segment the same resolution information
// as the old one (this is needed for stability checking).
let new_id = self.next_node_id();
self.resolver.clone_res(seg.id, new_id);
seg.id = new_id;
}
// Each `use` import is an item and thus are owners of the
// names in the path. Up to this point the nested import is
// the current owner, since we want each desugared import to

10
compiler/rustc_ast_lowering/src/lib.rs
View File

@ -148,10 +148,6 @@ trait ResolverAstLoweringExt {
fn legacy_const_generic_args(&self, expr: &Expr) -> Option<Vec<usize>>;
fn get_partial_res(&self, id: NodeId) -> Option<PartialRes>;
fn get_import_res(&self, id: NodeId) -> PerNS<Option<Res<NodeId>>>;
// Clones the resolution (if any) on 'source' and applies it
// to 'target'. Used when desugaring a `UseTreeKind::Nested` to
// multiple `UseTreeKind::Simple`s
fn clone_res(&mut self, source: NodeId, target: NodeId);
fn get_label_res(&self, id: NodeId) -> Option<NodeId>;
fn get_lifetime_res(&self, id: NodeId) -> Option<LifetimeRes>;
fn take_extra_lifetime_params(&mut self, id: NodeId) -> Vec<(Ident, NodeId, LifetimeRes)>;
@ -184,12 +180,6 @@ fn legacy_const_generic_args(&self, expr: &Expr) -> Option<Vec<usize>> {
None
}
fn clone_res(&mut self, source: NodeId, target: NodeId) {
if let Some(res) = self.partial_res_map.get(&source) {
self.partial_res_map.insert(target, *res);
}
}
/// Obtains resolution for a `NodeId` with a single resolution.
fn get_partial_res(&self, id: NodeId) -> Option<PartialRes> {
self.partial_res_map.get(&id).copied()