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use slice patterns for checking for elements of slice

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This commit is contained in:
Yotam Ofek 2025-01-18 07:44:37 +00:00
parent 7ae198b08d
commit ce0b72a99c
1 changed files with 6 additions and 5 deletions
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11
compiler/rustc_resolve/src/diagnostics.rs
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@ -2242,14 +2242,15 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
mut path: Vec<Segment>,
parent_scope: &ParentScope<'ra>,
) -> Option<(Vec<Segment>, Option<String>)> {
match (path.get(0), path.get(1)) {
match path[..] {
// `{{root}}::ident::...` on both editions.
// On 2015 `{{root}}` is usually added implicitly.
(Some(fst), Some(snd))
if fst.ident.name == kw::PathRoot && !snd.ident.is_path_segment_keyword() => {}
[first, second, ..]
if first.ident.name == kw::PathRoot && !second.ident.is_path_segment_keyword() => {}
// `ident::...` on 2018.
(Some(fst), _)
if fst.ident.span.at_least_rust_2018() && !fst.ident.is_path_segment_keyword() =>
[first, ..]
if first.ident.span.at_least_rust_2018()
&& !first.ident.is_path_segment_keyword() =>
{
// Insert a placeholder that's later replaced by `self`/`super`/etc.
path.insert(0, Segment::from_ident(Ident::empty()));