velcro 0.5.4

Convenience macros for initializing vectors, hash maps and other Rust collections.
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

use std::collections::HashMap;
use velcro::hash_map;

fn main() {
    let mut map = HashMap::new();
    map.insert('a', 0);
    map.insert('b', 1);
    map.insert('c', 1);
    map.insert('d', 1);
    map.insert('e', 0);
    map.insert('f', 0);
    map.insert('g', 0);
    map.insert('h', 0);
    let lit = hash_map! {
        'a': 0,
        ..('b'..='d'): 1,
        ..('e'..='h'): 0,
    };
    assert_eq!(map, lit);

    let other = vec![3, 4, 5];
    let map2 = hash_map! {
        0: "zero",
        1: "one",
        ..other: "all of these keys have the same value",
        ..(10..20): "as do these",
    };

    assert_eq!(map2.get(&0).unwrap(), &"zero");
    assert_eq!(
        map2.get(&3).unwrap(),
        &"all of these keys have the same value"
    );
    assert_eq!(
        map2.get(&4).unwrap(),
        &"all of these keys have the same value"
    );
    assert_eq!(map2.get(&10).unwrap(), &"as do these");
}