swc_parallel/
items.rs

1use self::private::Sealed;
2
3mod private {
4    pub trait Sealed {}
5
6    impl<T> Sealed for Vec<T> {}
7    impl<T> Sealed for &mut Vec<T> {}
8    impl<T> Sealed for &mut [T] {}
9    impl<T> Sealed for &[T] {}
10}
11pub trait IntoItems: Sealed {
12    type Elem;
13    type Items: Items<Elem = Self::Elem>;
14
15    fn into_items(self) -> Self::Items;
16}
17
18impl<T, I> IntoItems for I
19where
20    I: Items<Elem = T>,
21{
22    type Elem = T;
23    type Items = I;
24
25    fn into_items(self) -> Self::Items {
26        self
27    }
28}
29
30impl<'a, T> IntoItems for &'a mut Vec<T>
31where
32    T: Send + Sync,
33{
34    type Elem = &'a mut T;
35    type Items = &'a mut [T];
36
37    fn into_items(self) -> Self::Items {
38        self
39    }
40}
41
42/// This is considered as a private type and it's NOT A PUBLIC API.
43#[allow(clippy::len_without_is_empty)]
44pub trait Items: Sized + IntoIterator<Item = Self::Elem> + Send + Sealed {
45    type Elem: Send + Sync;
46
47    fn len(&self) -> usize;
48
49    fn split_at(self, idx: usize) -> (Self, Self);
50}
51
52impl<T> Items for Vec<T>
53where
54    T: Send + Sync,
55{
56    type Elem = T;
57
58    fn len(&self) -> usize {
59        Vec::len(self)
60    }
61
62    fn split_at(mut self, at: usize) -> (Self, Self) {
63        let b = self.split_off(at);
64
65        (self, b)
66    }
67}
68
69impl<'a, T> Items for &'a mut [T]
70where
71    T: Send + Sync,
72{
73    type Elem = &'a mut T;
74
75    fn len(&self) -> usize {
76        <[T]>::len(self)
77    }
78
79    fn split_at(self, at: usize) -> (Self, Self) {
80        let (a, b) = self.split_at_mut(at);
81
82        (a, b)
83    }
84}
85
86impl<'a, T> Items for &'a [T]
87where
88    T: Send + Sync,
89{
90    type Elem = &'a T;
91
92    fn len(&self) -> usize {
93        <[T]>::len(self)
94    }
95
96    fn split_at(self, at: usize) -> (Self, Self) {
97        let (a, b) = self.split_at(at);
98
99        (a, b)
100    }
101}
102//
swc_parallel/items.rs

swc_parallel/
items.rs
