Macro pretty_bytes 

pretty_bytes!() { /* proc-macro */ }

Create a slice out of a hex string that uses the convention of pretty CBOR

Unlike pretty!(), this does not check whether the data is valid CBOR, and returns a slice instead.

The function is essentially equivalent to the hex-literal crate’s hex! macro, but allows comments in the style of CBOR’s pretty printing.

const PACKET: &'static [u8] = pretty_bytes!(r#"
    ff 63 48 8a 60     # application dependent header
    65                 # text(5)
       68656C6C6F      # "hello"
"#);