Concatenates literals into a byte slice.

This macro takes any number of comma-separated literals, and concatenates them all intoone, yielding an expression of type&[u8; _], which represents all of the literalsconcatenated left-to-right. The literals passed can be any combination of:

• byte literals (b'r')
• byte strings (b"Rust")
• arrays of bytes/numbers ([b'A', 66, b'C'])

§Examples

#![feature(concat_bytes)]lets:&[u8;6] =concat_bytes!(b'A',b"BC", [68,b'E',70]);assert_eq!(s,b"ABCDEF");