1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
pub struct Change {
from: usize,
to: usize,
insert: Option<String>,
}
impl Change {
pub fn new(from: usize, to: usize, insert: Option<String>) {
// old_extent, new_extent, insert
}
}
pub struct Transaction {}
// ChangeSpec = Change | ChangeSet | Vec<Change>
// ChangeDesc as a ChangeSet without text: can't be applied, cheaper to store.
// ChangeSet = ChangeDesc with Text
pub struct ChangeSet {
// basically Vec<ChangeDesc> where ChangeDesc = (current len, replacement len?)
// (0, n>0) for insertion, (n>0, 0) for deletion, (>0, >0) for replacement
sections: Vec<(usize, isize)>,
}
//
// trait Transaction
// trait StrictTransaction
|
