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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
pub struct NonEmptyVec<T> {
first: T,
rest: Vec<T>,
}
impl<T> NonEmptyVec<T> {
#[inline]
pub fn new(first: T) -> Self {
NonEmptyVec { first, rest: Vec::new() }
}
#[inline]
pub fn last_mut(&mut self) -> &mut T {
self.rest.last_mut().unwrap_or(&mut self.first)
}
#[inline]
pub fn pop(&mut self) -> Option<T> {
self.rest.pop()
}
#[inline]
pub fn push(&mut self, value: T) {
self.rest.push(value)
}
#[inline]
pub fn len(&self) -> usize {
1 + self.rest.len()
}
#[inline]
pub fn into_last(mut self) -> T {
self.rest.pop().unwrap_or(self.first)
}
}