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add comments and cleanup

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This commit is contained in:
yukang 2023-03-26 12:03:25 +08:00
parent a860a720ba
commit 7b4f436a30
1 changed files with 10 additions and 3 deletions
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13
compiler/rustc_span/src/edit_distance.rs
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@ -190,6 +190,7 @@ fn find_best_match_for_name_impl(
let mut dist = dist.unwrap_or_else(|| cmp::max(lookup.len(), 3) / 3);
let mut best = None;
// store the candidates with the same distance, only for `use_substring_score` current.
let mut next_candidates = vec![];
for c in candidates {
match if use_substring_score {
@ -200,19 +201,25 @@ fn find_best_match_for_name_impl(
Some(0) => return Some(*c),
Some(d) => {
if use_substring_score {
dist = d;
if d < dist {
dist = d;
next_candidates.clear();
} else {
// `d == dist` here, we need to store the candidates with the same distance
// so we won't decrease the distance in the next loop.
}
next_candidates.push(*c);
best = Some(*c);
} else {
dist = d - 1;
best = Some(*c);
}
best = Some(*c);
}
None => {}
}
}
if next_candidates.len() > 1 {
debug_assert!(use_substring_score);
best = find_best_match_for_name_impl(
false,
&next_candidates,