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index: use iterator to simplify segment_resolve_prefix() a bit further

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This commit is contained in:
Yuya Nishihara 2023-01-26 15:34:22 +09:00
parent 956a2d5f83
commit 770ca72a1f
1 changed files with 17 additions and 32 deletions
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49
lib/src/index.rs
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@ -1337,22 +1337,14 @@ impl IndexSegment for ReadonlyIndex {
let lookup_pos = self
.commit_id_byte_prefix_to_lookup_pos(&min_bytes_prefix)
.unwrap_or(self.num_local_commits);
let mut first_match = None;
for i in lookup_pos..self.num_local_commits {
let entry = self.lookup_entry(i);
let id = entry.commit_id();
if prefix.matches(&id) {
if first_match.is_some() {
return PrefixResolution::AmbiguousMatch;
}
first_match = Some(id)
} else {
break;
}
}
match first_match {
None => PrefixResolution::NoMatch,
Some(id) => PrefixResolution::SingleMatch(id),
let mut matches = (lookup_pos..self.num_local_commits)
.map(|pos| self.lookup_entry(pos).commit_id())
.take_while(|id| prefix.matches(id))
.fuse();
match (matches.next(), matches.next()) {
(Some(id), None) => PrefixResolution::SingleMatch(id),
(Some(_), Some(_)) => PrefixResolution::AmbiguousMatch,
(None, _) => PrefixResolution::NoMatch,
}
}
@ -1437,23 +1429,16 @@ impl IndexSegment for MutableIndex {
fn segment_resolve_prefix(&self, prefix: &HexPrefix) -> PrefixResolution<CommitId> {
let (_, min_bytes_prefix) = prefix.bytes_prefixes();
let potential_range = self
let mut matches = self
.lookup
.range((Bound::Included(&min_bytes_prefix), Bound::Unbounded));
let mut first_match = None;
for (id, _pos) in potential_range {
if prefix.matches(id) {
if first_match.is_some() {
return PrefixResolution::AmbiguousMatch;
}
first_match = Some(id)
} else {
break;
}
}
match first_match {
None => PrefixResolution::NoMatch,
Some(id) => PrefixResolution::SingleMatch(id.clone()),
.range((Bound::Included(&min_bytes_prefix), Bound::Unbounded))
.map(|(id, _pos)| id)
.take_while(|&id| prefix.matches(id))
.fuse();
match (matches.next(), matches.next()) {
(Some(id), None) => PrefixResolution::SingleMatch(id.clone()),
(Some(_), Some(_)) => PrefixResolution::AmbiguousMatch,
(None, _) => PrefixResolution::NoMatch,
}
}