A pretty-printing library based on Wadler's "A Prettier Printer" with support for ANSI styling.
I'm using this to walk myself through the paper and understand it well enough to implement; plus it doesn't look like there's an existing implementation of this.
termion: Allows the width and color support of the terminal to be autodetected.
impl Trait is stabilized, use impl Display instead of the Display struct.no_std support.unicode-width(&mut Write, &str, Style) -> IoResult<()> function that uses Windows syscalls there and ANSI everywhere else.