Function encode_generic 

pub const fn encode_generic<const UPPER: bool>(
    src: &[u8],
    dst: &mut [MaybeUninit<u8>],
) -> Result<(), InvalidInput>

encode() or decode(), but const-evaluable at the cost of performance.

Macro encode! is useful when you want to encode a byte array to hexadecimal string in const contexts, such as creating a const variable or a static variable.

Errors

The input and output lengths do not match (2 * src.len() == dst.len()).