Macro const_str::hex

macro_rules! hex {
    ($s: expr) => { ... };
}

Converts hexadecimal string slices to a byte array.

It accepts the following characters in the input string:

• '0'...'9', 'a'...'f', 'A'...'F' — hex characters which will be used in construction of the output byte array
• ' ', '\r', '\n', '\t' — formatting characters which will be ignored

Examples

use const_str::hex;

const DATA: [u8; 4] = hex!("01020304");
assert_eq!(DATA, [1, 2, 3, 4]);

assert_eq!(hex!("a1 b2 c3 d4"), [0xA1, 0xB2, 0xC3, 0xD4]);
assert_eq!(hex!("E5 E6 90 92"), [0xE5, 0xE6, 0x90, 0x92]);

assert_eq!(hex!(["0a0B", "0C0d"]), [10, 11, 12, 13]);

const S1: &str = "00010203 04050607 08090a0b 0c0d0e0f";
const B1: &[u8] = &hex!(S1);
const B2: &[u8] = &hex!([
    "00010203 04050607", // first half
    "08090a0b 0c0d0e0f", // second half
]);

assert_eq!(B1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]);
assert_eq!(B2, B1);