hex-literal 0.1.4

Procedural macro for converting hexadecimal string to byte array at compile time.

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

# #[macro_use] extern crate hex_literal;
const DATA: [u8; 4] = hex!("01020304");

# fn main() {
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]);
# }