Crate hex_literal

This crate provides hex! macro for converting hexadecimal string literal to byte array at compile time.

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

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]);
let bytes = hex!("
    00010203 04050607
    08090a0b 0c0d0e0f
");
assert_eq!(bytes, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]);