Function rustc_ap_rustc_lexer::unescape::unescape_byte_literal

pub fn unescape_byte_literal<F>(
    literal_text: &str, 
    mode: Mode, 
    callback: &mut F
) where
    F: FnMut(Range<usize>, Result<u8, EscapeError>), 

Takes a contents of a byte, byte string or raw byte string (without quotes) and produces a sequence of bytes or errors. Values are returned through invoking of the provided callback.