maplike 0.13.7

Rust traits for abstract containers and operations over them. Treats every container as map. You can have the same code work on Vec, HashMap, BTreeMap, Option, Box.
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

// SPDX-FileCopyrightText: 2026 maplike contributors
//
// SPDX-License-Identifier: MIT OR Apache-2.0

use alloc_::rc::{Rc, Weak};

use crate::containers::Container;
use crate::iter::{Iter, Values};
use crate::ops::{Assign, Clear, Get, Len, Modify, Put, Remove, Set, WithOne};

impl<V> Container for Rc<V> {
    type Key = usize;
    type Value = V;
}

impl<V> WithOne<V> for Rc<V> {
    #[inline(always)]
    fn with_one(value: V) -> Self {
        Rc::new(value)
    }
}

impl<V> Assign for Rc<V> {
    #[inline(always)]
    fn assign(&mut self, value: Self) {
        *self = value;
    }
}

impl<V> Get<usize> for Rc<V> {
    #[inline(always)]
    fn get(&self, index: &usize) -> Option<&V> {
        if *index == 0 { Some(&**self) } else { None }
    }
}

impl<V> Set<usize> for Rc<V> {
    type Output = Option<V>;

    #[inline(always)]
    fn set(&mut self, index: usize, value: V) -> Option<V> {
        assert_eq!(index, 0);
        Some(core::mem::replace(
            Rc::get_mut(self).expect("Rc is not uniquely owned"),
            value,
        ))
    }
}

impl<V> Modify<usize> for Rc<V> {
    #[inline(always)]
    fn modify<F>(&mut self, index: &usize, f: F)
    where
        F: FnOnce(&mut V),
    {
        assert_eq!(*index, 0);
        f(Rc::get_mut(self).expect("Rc is not uniquely owned"))
    }
}

impl<V> Put<V> for Rc<V> {
    #[inline(always)]
    fn put(&mut self, value: V) -> Option<V> {
        Some(core::mem::replace(
            Rc::get_mut(self).expect("Rc is not uniquely owned"),
            value,
        ))
    }
}

impl<V> Len for Rc<V> {
    #[inline(always)]
    fn len(&self) -> usize {
        1
    }
}

impl<'a, V: 'a> Values<'a> for Rc<V> {
    type Values = core::iter::Once<&'a V>;

    #[inline(always)]
    fn values(&'a self) -> Self::Values {
        core::iter::once(self.as_ref())
    }
}

impl<'a, V: 'a> Iter<'a, usize> for Rc<V> {
    type Iter = core::iter::Once<(usize, &'a V)>;

    #[inline(always)]
    fn iter(&'a self) -> Self::Iter {
        core::iter::once((0, self.as_ref()))
    }
}

impl<V> Container for Weak<V> {
    type Key = usize;
    type Value = V;
}

impl<V> Assign for Weak<V> {
    #[inline(always)]
    fn assign(&mut self, value: Self) {
        *self = value;
    }
}

impl<V> Remove<usize> for Weak<V> {
    type Output = Option<V>;

    #[inline(always)]
    fn remove(&mut self, index: &usize) -> Option<V> {
        if *index == 0 {
            *self = Weak::new();
            None
        } else {
            None
        }
    }
}

impl<V> Clear for Weak<V> {
    #[inline(always)]
    fn clear(&mut self) {
        *self = Weak::new();
    }
}

impl<V> Len for Weak<V> {
    #[inline(always)]
    fn len(&self) -> usize {
        usize::from(self.upgrade().is_some())
    }
}