expand

Macro to expand byte string literals

Usage

```rust use expand::expand;

assert_eq!( &expand!([@b"Hello,", b' ', @b"world", b'!']), b"Hello, world!" );

if let expand!([@b"patt", x, y, b'n', ..]) = b"pattern matching" { asserteq!(x, &b'e'); asserteq!(y, &b'r'); } else { panic!("pattern matching failed"); } ```