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Remove Chunk categorization from MergeIterator

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This commit is contained in:
Magnus Hoff 2017-11-17 12:41:09 +01:00
parent 1985677474
commit 34ca3e424d
1 changed files with 17 additions and 20 deletions
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37
src/merge.rs
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@ -4,10 +4,7 @@ use diff;
use diff::Result::*;
#[derive(Debug, PartialEq)]
enum Chunk<'a, Item: 'a + Debug + PartialEq + Eq>{
Stable(&'a [diff::Result<Item>], &'a [diff::Result<Item>]),
Unstable(&'a [diff::Result<Item>], &'a [diff::Result<Item>]),
}
struct Chunk<'a, Item: 'a + Debug + PartialEq + Eq>(&'a [diff::Result<Item>], &'a [diff::Result<Item>]);
struct MergeIterator<'a, Item>
where
@ -38,7 +35,7 @@ where
i += 1;
}
if i > 0 {
let chunk = Chunk::Stable(&self.left[..i], &self.right[..i]);
let chunk = Chunk(&self.left[..i], &self.right[..i]);
self.left = &self.left[i..];
self.right = &self.right[i..];
return Some(chunk);
@ -63,14 +60,14 @@ where
ri += 1;
},
(Some(&Both(..)), Some(&Both(..))) => {
let chunk = Chunk::Unstable(&self.left[..li], &self.right[..ri]);
let chunk = Chunk(&self.left[..li], &self.right[..ri]);
self.left = &self.left[li..];
self.right = &self.right[ri..];
return Some(chunk);
}
_ => {
if self.left.len() > 0 || self.right.len() > 0 {
let chunk = Chunk::Unstable(self.left, self.right);
let chunk = Chunk(self.left, self.right);
self.left = &self.left[self.left.len()..];
self.right = &self.right[self.right.len()..];
return Some(chunk);
@ -99,11 +96,11 @@ mod test {
let merge = MergeIterator::new(&oa, &ob).collect::<Vec<_>>();
assert_eq!(vec![
Chunk::Stable (&oa[0.. 3], &ob[0.. 3]),
Chunk::Unstable(&oa[3.. 6], &ob[3.. 3]),
Chunk::Stable (&oa[6.. 9], &ob[3.. 6]),
Chunk::Unstable(&oa[9.. 9], &ob[6.. 9]),
Chunk::Stable (&oa[9..12], &ob[9..12]),
Chunk(&oa[0.. 3], &ob[0.. 3]),
Chunk(&oa[3.. 6], &ob[3.. 3]),
Chunk(&oa[6.. 9], &ob[3.. 6]),
Chunk(&oa[9.. 9], &ob[6.. 9]),
Chunk(&oa[9..12], &ob[9..12]),
], merge);
}
@ -118,9 +115,9 @@ mod test {
let merge = MergeIterator::new(&oa, &ob).collect::<Vec<_>>();
assert_eq!(vec![
Chunk::Stable (&oa[0.. 3], &ob[0.. 3]),
Chunk::Unstable(&oa[3.. 9], &ob[3.. 9]),
Chunk::Stable (&oa[9..12], &ob[9..12]),
Chunk(&oa[0.. 3], &ob[0.. 3]),
Chunk(&oa[3.. 9], &ob[3.. 9]),
Chunk(&oa[9..12], &ob[9..12]),
], merge);
}
@ -135,8 +132,8 @@ mod test {
let merge = MergeIterator::new(&oa, &ob).collect::<Vec<_>>();
assert_eq!(vec![
Chunk::Stable (&oa[0..9], &ob[0.. 9]),
Chunk::Unstable(&oa[9..9], &ob[9..12]),
Chunk(&oa[0..9], &ob[0.. 9]),
Chunk(&oa[9..9], &ob[9..12]),
], merge);
}
@ -151,8 +148,8 @@ mod test {
let merge = MergeIterator::new(&oa, &ob).collect::<Vec<_>>();
assert_eq!(vec![
Chunk::Stable (&oa[0..6], &ob[0.. 6]),
Chunk::Unstable(&oa[6..9], &ob[6..12]),
Chunk(&oa[0..6], &ob[0.. 6]),
Chunk(&oa[6..9], &ob[6..12]),
], merge);
}
@ -167,7 +164,7 @@ mod test {
let merge = MergeIterator::new(&oa, &ob).collect::<Vec<_>>();
assert_eq!(vec![
Chunk::Unstable(&oa[0..6], &ob[0..6]),
Chunk(&oa[0..6], &ob[0..6]),
], merge);
}
}