maplike 0.15.0

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
135
136
137
138
139
140
141
142
143
144
145

// SPDX-FileCopyrightText: 2025 maplike contributors
//
// SPDX-License-Identifier: MIT OR Apache-2.0

use rstar::{RTree, RTreeObject, RTreeParams};

use crate::abc::{Container, Keyed};
use crate::iter::{IntoIter, IntoValues, Iter, Values, ValuesFromKeyValuePairs};
use crate::ops::{Clear, Get, Insert, Len, Put, Remove, Set, WithOne};

impl<K: RTreeObject, Params: RTreeParams> Container for RTree<K, Params> {
    type Value = ();
}

impl<K: RTreeObject, Params: RTreeParams> Keyed for RTree<K, Params> {
    type Key = K;
}

impl<K: RTreeObject, Params: RTreeParams> WithOne<K> for RTree<K, Params> {
    #[inline(always)]
    fn with_one(element: K) -> Self {
        let mut rtree = RTree::new_with_params();
        RTree::insert(&mut rtree, element);

        rtree
    }
}

impl<K: RTreeObject + PartialEq, Params: RTreeParams> Get<K> for RTree<K, Params> {
    #[inline(always)]
    fn get(&self, key: &K) -> Option<&()> {
        RTree::contains(self, key).then_some(&())
    }
}

impl<K: RTreeObject + PartialEq, Params: RTreeParams> Set<K> for RTree<K, Params> {
    type Output = ();

    #[inline(always)]
    fn set(&mut self, key: K, _value: ()) {
        RTree::remove(self, &key);
        RTree::insert(self, key);
    }
}

impl<K: RTreeObject, Params: RTreeParams> Insert<K> for RTree<K, Params> {
    type Output = ();

    #[inline(always)]
    fn insert(&mut self, key: K, _value: ()) {
        RTree::insert(self, key);
    }
}

impl<K: RTreeObject + PartialEq, Params: RTreeParams> Remove<K> for RTree<K, Params> {
    type Output = Option<()>;

    #[inline(always)]
    fn remove(&mut self, key: &K) -> Option<()> {
        RTree::remove(self, key).map(|_| ())
    }
}

impl<K: RTreeObject, Params: RTreeParams> Put<K> for RTree<K, Params> {
    #[inline(always)]
    fn put(&mut self, key: K) -> Option<K> {
        RTree::insert(self, key);

        None
    }
}

impl<K: RTreeObject + PartialEq, Params: RTreeParams> Clear for RTree<K, Params> {
    #[inline(always)]
    fn clear(&mut self) {
        // TODO: Send a path upstream to implement `.clear()` efficiently,
        // without having to drain.
        self.drain().for_each(drop);
    }
}

impl<K: RTreeObject> Len for RTree<K> {
    #[inline(always)]
    fn len(&self) -> usize {
        RTree::size(self)
    }
}

impl<'a, K: RTreeObject + 'a, Params: RTreeParams + 'a> Values<'a> for RTree<K, Params> {
    type Values = ValuesFromKeyValuePairs<MapIter<'a, K>>;

    #[inline(always)]
    fn values(&'a self) -> Self::Values {
        ValuesFromKeyValuePairs(Iter::iter(self))
    }
}

impl<K: RTreeObject, Params: RTreeParams> IntoValues for RTree<K, Params> {
    type IntoValues = ValuesFromKeyValuePairs<MapIntoIter<K>>;

    #[inline(always)]
    fn into_values(self) -> Self::IntoValues {
        ValuesFromKeyValuePairs(IntoIter::into_iter(self))
    }
}

pub struct MapIter<'a, K: RTreeObject>(rstar::iterators::RTreeIterator<'a, K>);

impl<'a, K: RTreeObject> Iterator for MapIter<'a, K> {
    type Item = (&'a K, &'a ());

    #[inline(always)]
    fn next(&mut self) -> Option<Self::Item> {
        self.0.next().map(|key| (key, &()))
    }
}

impl<'a, K: RTreeObject + 'a, Params: RTreeParams + 'a> Iter<'a, &'a K> for RTree<K, Params> {
    type Iter = MapIter<'a, K>;

    #[inline(always)]
    fn iter(&'a self) -> MapIter<'a, K> {
        MapIter(RTree::iter(self))
    }
}

pub struct MapIntoIter<K: RTreeObject>(rstar::iterators::IntoIter<K>);

impl<K: RTreeObject> Iterator for MapIntoIter<K> {
    type Item = (K, ());

    #[inline(always)]
    fn next(&mut self) -> Option<Self::Item> {
        self.0.next().map(|k| (k, ()))
    }
}

impl<K: RTreeObject, Params: RTreeParams> IntoIter<K> for RTree<K, Params> {
    type IntoIter = MapIntoIter<K>;

    #[inline(always)]
    fn into_iter(self) -> MapIntoIter<K> {
        MapIntoIter(IntoIterator::into_iter(self))
    }
}