Function hex_string 

pub fn hex_string<const N: usize>(src: &[u8]) -> Result<String<N>, Error>

Available on crate feature heapless-08 only.

Encodes src as a lowercase hexadecimal string with inline capacity N.

Every byte produces two ASCII digits, with no prefix or separators. The result owns its storage without allocating. Empty input succeeds even when N is zero. Any unused capacity remains available on the returned string.

Errors

Returns Error::Overflow if twice the input length cannot be represented, or Error::OutputTooSmall if N is less than the encoded byte length. Insufficient capacity is an error rather than a panic.

Examples

use faster_hex::{heapless_08::hex_string, Error};

assert_eq!(hex_string::<4>(&[0xab, 1])?.as_str(), "ab01");
assert!(matches!(hex_string::<3>(&[0xab, 1]),
    Err(Error::OutputTooSmall { required: 4, .. })));
assert_eq!(hex_string::<0>(&[])?.as_str(), "");