romap 0.4.0

A trait for read-only-maps
Documentation 
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

use crate::RoMap;
use either::Either;

impl<'a, K: 'a + ?Sized, V: 'a + ?Sized, A: RoMap<'a, K, V>, B: RoMap<'a, K, V>> RoMap<'a, K, V>
    for Either<A, B>
{
    const ITER_ORDER_SORTED: bool = A::ITER_ORDER_SORTED && B::ITER_ORDER_SORTED;

    fn contains_key(self, k: &K) -> bool {
        match self {
            Either::Left(a) => a.contains_key(k),
            Either::Right(b) => b.contains_key(k),
        }
    }

    fn get(self, k: &K) -> Option<&'a V> {
        match self {
            Either::Left(a) => a.get(k),
            Either::Right(b) => b.get(k),
        }
    }

    fn get_key(self, k: &K) -> Option<&'a K> {
        match self {
            Either::Left(a) => a.get_key(k),
            Either::Right(b) => b.get_key(k),
        }
    }

    fn get_key_value(self, k: &K) -> Option<(&'a K, &'a V)> {
        match self {
            Either::Left(a) => a.get_key_value(k),
            Either::Right(b) => b.get_key_value(k),
        }
    }

    fn is_empty(self) -> bool {
        match self {
            Either::Left(a) => a.is_empty(),
            Either::Right(b) => b.is_empty(),
        }
    }

    fn len(self) -> usize {
        match self {
            Either::Left(a) => a.len(),
            Either::Right(b) => b.len(),
        }
    }

    fn keys(self) -> impl 'a + Iterator<Item = &'a K> {
        match self {
            Either::Left(a) => Either::Left(a.keys()),
            Either::Right(b) => Either::Right(b.keys()),
        }
        .into_iter()
    }

    fn values(self) -> impl 'a + Iterator<Item = &'a V> {
        match self {
            Either::Left(a) => Either::Left(a.values()),
            Either::Right(b) => Either::Right(b.values()),
        }
        .into_iter()
    }

    fn iter(self) -> impl 'a + Iterator<Item = (&'a K, &'a V)> {
        match self {
            Either::Left(a) => Either::Left(a.iter()),
            Either::Right(b) => Either::Right(b.iter()),
        }
        .into_iter()
    }
}