Macro fonts 

macro_rules! fonts {
    ($ ($font:expr),*) => { ... };
}

组合多种字体

Example

use color_string::fonts;
use color_string::Font::*;
let fonts = fonts!(Red, Bold, Underline, BgColor(1, 2, 3));
assert_eq!("\x1b[31;1;4;48;2;1;2;3m", fonts)