Function bytes_up_to

pub const fn bytes_up_to(buffer: &[u8], upto: usize) -> &[u8]

Const equivalent of &buffer[..upto] with saturating indexing.

“saturating indexing” means that if upto > buffer.len(), then this returns all of buffer instead of panicking.

Example

use const_panic::utils::bytes_up_to;

const BYTES: &[u8] = &[3, 5, 8, 13, 21, 34, 55, 89];

const SLICE: &[u8] = bytes_up_to(BYTES, 4);
assert_eq!(SLICE, &[3, 5, 8, 13][..]);

const WHOLE: &[u8] = bytes_up_to(BYTES, usize::MAX);
assert_eq!(WHOLE, &[3, 5, 8, 13, 21, 34, 55, 89][..]);