rowan/
cow_mut.rs

1#[derive(Debug)]
2pub(crate) enum CowMut<'a, T> {
3    Owned(T),
4    Borrowed(&'a mut T),
5}
6
7impl<T> std::ops::Deref for CowMut<'_, T> {
8    type Target = T;
9    fn deref(&self) -> &T {
10        match self {
11            CowMut::Owned(it) => it,
12            CowMut::Borrowed(it) => *it,
13        }
14    }
15}
16
17impl<T> std::ops::DerefMut for CowMut<'_, T> {
18    fn deref_mut(&mut self) -> &mut T {
19        match self {
20            CowMut::Owned(it) => it,
21            CowMut::Borrowed(it) => *it,
22        }
23    }
24}
25
26impl<T: Default> Default for CowMut<'_, T> {
27    fn default() -> Self {
28        CowMut::Owned(T::default())
29    }
30}
rowan/cow_mut.rs

rowan/
cow_mut.rs
