musli-zerocopy 0.0.59

Zero copy primitives for use in Müsli.
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

use anyhow::{Context, Result};
use musli_zerocopy::{AlignedBuf, Pair, Unsized, ZeroCopy};

#[derive(ZeroCopy)]
#[repr(C)]
struct Custom {
    field: u32,
    string: Unsized<str>,
}

fn main() -> Result<()> {
    let mut buf = AlignedBuf::new();

    let string = buf.store_unsized("string")?;

    let c1 = buf.store(&Custom { field: 1, string })?;
    let c2 = buf.store(&Custom { field: 2, string })?;

    let mut map = vec![Pair::new(1, c1), Pair::new(2, c2)];

    let map = buf.insert_map(&mut map)?;
    let buf = buf.as_aligned();
    let map = buf.bind(map)?;

    let c1 = buf.load(map.get(&1)?.context("Missing key 1")?)?;
    assert_eq!(c1.field, 1);
    assert_eq!(buf.load(c1.string)?, "string");

    let c2 = buf.load(map.get(&2)?.context("Missing key 2")?)?;
    assert_eq!(c2.field, 2);
    assert_eq!(buf.load(c2.string)?, "string");

    assert!(map.get(&3)?.is_none());
    Ok(())
}