// run-pass
#![allow(unused_mut)]
#![allow(non_camel_case_types)]


#[allow(unused_tuple_struct_fields)]
enum color {
    rgb(isize, isize, isize),
    rgba(isize, isize, isize, isize),
    hsl(isize, isize, isize),
}

fn process(c: color) -> isize {
    let mut x: isize;
    match c {
      color::rgb(r, _, _) => { x = r; }
      color::rgba(_, _, _, a) => { x = a; }
      color::hsl(_, s, _) => { x = s; }
    }
    return x;
}

pub fn main() {
    let gray: color = color::rgb(127, 127, 127);
    let clear: color = color::rgba(50, 150, 250, 0);
    let red: color = color::hsl(0, 255, 255);
    assert_eq!(process(gray), 127);
    assert_eq!(process(clear), 0);
    assert_eq!(process(red), 255);
}