Function subarray_unchecked 

pub const unsafe fn subarray_unchecked<const S: usize, T>(
    slice: &[T],
    index: usize,
) -> &[T; S]

Get a subarray of length S at index without bounds checking.

This is the unchecked variant of crate::subarray. See that function for a safe alternative.

Safety

The caller must ensure that index + S <= slice.len(). Violating this is undefined behavior.

Examples

use ps_util::subarray_unchecked;
let data = [1, 2, 3, 4, 5];
// SAFETY: index=1, S=2, slice.len()=5, so 1+2 <= 5
let chunk: &[i32; 2] = unsafe { subarray_unchecked::<2, i32>(&data, 1) };
assert_eq!(chunk, &[2, 3]);

Works with vectors:

use ps_util::subarray_unchecked;
let vec = vec!["a", "b", "c", "d"];
// SAFETY: index=0, S=3, vec.len()=4, so 0+3 <= 4
let chunk: &[&str; 3] = unsafe { subarray_unchecked::<3, &str>(&vec, 0) };
assert_eq!(chunk, &["a", "b", "c"]);