Function konst::slice::get_range_mut

pub const fn get_range_mut<T>(
    slice: &mut [T], 
    start: usize, 
    end: usize
) -> Option<&mut [T]>

This is supported on crate features mut_refs or nightly_mut_refs only.

A const equivalent of slice.get_mut(start..end).

Alternatives

For a const equivalent of slice.get_mut(start..) there’s get_from_mut.

For a const equivalent of slice.get_mut(..end) there’s get_up_to_mut.

Performance

If the “constant_time_slice” feature is disabled, thich takes linear time to remove the leading and trailing elements, proportional to start + (slice.len() - end).

If the “constant_time_slice” feature is enabled, it takes constant time to run, but uses a few nightly features.

Example

use konst::slice;

let mut fibb = [3, 5, 8, 13, 21, 34, 55];

assert_eq!(slice::get_range_mut(&mut fibb, 0, 0), Some(&mut [][..]));
assert_eq!(slice::get_range_mut(&mut fibb, 2, 4), Some(&mut [8, 13][..]));
assert_eq!(slice::get_range_mut(&mut fibb, 4, 7), Some(&mut [21, 34, 55][..]));
assert_eq!(slice::get_range_mut(&mut fibb, 0, 7), Some(&mut [3, 5, 8, 13, 21, 34, 55][..]));
assert_eq!(slice::get_range_mut(&mut fibb, 0, 1000), None);