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remove redundant flat vs nested distinction to simplify enum

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Pietro Albini 2024-04-01 23:42:33 +02:00
parent 829338a640
commit 2c26072d8c
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GPG Key ID: 3E06ABE80BAAF19C
1 changed files with 10 additions and 19 deletions
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29
compiler/rustc_resolve/src/check_unused.rs
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@ -268,9 +268,8 @@ fn visit_use_tree(&mut self, use_tree: &'a ast::UseTree, id: ast::NodeId, nested
enum UnusedSpanResult {
Used,
FlatUnused { span: Span, remove: Span },
NestedFullUnused { spans: Vec<Span>, remove: Span },
NestedPartialUnused { spans: Vec<Span>, remove: Vec<Span> },
Unused { spans: Vec<Span>, remove: Span },
PartialUnused { spans: Vec<Span>, remove: Vec<Span> },
}
fn calc_unused_spans(
@ -288,14 +287,14 @@ fn calc_unused_spans(
match use_tree.kind {
ast::UseTreeKind::Simple(..) | ast::UseTreeKind::Glob => {
if unused_import.unused.contains(&use_tree_id) {
UnusedSpanResult::FlatUnused { span: use_tree.span, remove: full_span }
UnusedSpanResult::Unused { spans: vec![use_tree.span], remove: full_span }
} else {
UnusedSpanResult::Used
}
}
ast::UseTreeKind::Nested(ref nested) => {
if nested.is_empty() {
return UnusedSpanResult::FlatUnused { span: use_tree.span, remove: full_span };
return UnusedSpanResult::Unused { spans: vec![use_tree.span], remove: full_span };
}
let mut unused_spans = Vec::new();
@ -308,15 +307,11 @@ fn calc_unused_spans(
all_nested_unused = false;
None
}
UnusedSpanResult::FlatUnused { span, remove } => {
unused_spans.push(span);
Some(remove)
}
UnusedSpanResult::NestedFullUnused { mut spans, remove } => {
UnusedSpanResult::Unused { mut spans, remove } => {
unused_spans.append(&mut spans);
Some(remove)
}
UnusedSpanResult::NestedPartialUnused { mut spans, remove: mut to_remove_extra } => {
UnusedSpanResult::PartialUnused { mut spans, remove: mut to_remove_extra } => {
all_nested_unused = false;
unused_spans.append(&mut spans);
to_remove.append(&mut to_remove_extra);
@ -349,9 +344,9 @@ fn calc_unused_spans(
if unused_spans.is_empty() {
UnusedSpanResult::Used
} else if all_nested_unused {
UnusedSpanResult::NestedFullUnused { spans: unused_spans, remove: full_span }
UnusedSpanResult::Unused { spans: unused_spans, remove: full_span }
} else {
UnusedSpanResult::NestedPartialUnused { spans: unused_spans, remove: to_remove }
UnusedSpanResult::PartialUnused { spans: unused_spans, remove: to_remove }
}
}
}
@ -417,15 +412,11 @@ pub(crate) fn check_unused(&mut self, krate: &ast::Crate) {
let mut fixes = Vec::new();
let spans = match calc_unused_spans(unused, &unused.use_tree, unused.use_tree_id) {
UnusedSpanResult::Used => continue,
UnusedSpanResult::FlatUnused { span, remove } => {
fixes.push((remove, String::new()));
vec![span]
}
UnusedSpanResult::NestedFullUnused { spans, remove } => {
UnusedSpanResult::Unused { spans, remove } => {
fixes.push((remove, String::new()));
spans
}
UnusedSpanResult::NestedPartialUnused { spans, remove } => {
UnusedSpanResult::PartialUnused { spans, remove } => {
for fix in &remove {
fixes.push((*fix, String::new()));
}