Crates.io | pinned_vec |
lib.rs | pinned_vec |
version | 0.1.1 |
source | src |
created_at | 2021-11-25 05:28:01.75528 |
updated_at | 2021-11-25 05:38:43.40216 |
description | Vec-like data structure whose elements never move. |
homepage | |
repository | https://github.com/wishawa/decurse |
max_upload_size | |
id | 487429 |
size | 8,682 |
Vec-like structure whose elements never move.
Normal Vec holds all its content in one contigious region, and moves when it needs to expand. PinnedVec holds several smaller sub-vector, each of which never moves. The first sub-vector is of capacity 1, the second 2, the third 4, the nth 2^(n-1).
use pinned_vec::PinnedVec;
use std::pin::Pin;
let mut v = PinnedVec::new();
v.push(5);
{
let r: Pin<&i32> = v.get(0).unwrap();
assert_eq!(*r, 5);
}
{
let r: Pin<&mut i32> = v.get_mut(0).unwrap();
assert_eq!(*r, 5);
}
assert_eq!(v.len(), 1);
v.pop();
v.push(7);
v.push(8);
v.replace(0, 6);
assert_eq!(*v.get(0).unwrap(), 6);
assert_eq!(*v.get(1).unwrap(), 8);