Function iter_rev

cranelift/entity/src/boxed_slice.rs:207–234

()

    #[test]
    fn iter_rev() {
        let mut p: PrimaryMap<E, usize> = PrimaryMap::new();
        p.push(12);
        p.push(33);
        let mut m = p.into_boxed_slice();

        let mut i = 2;
        for (key, value) in m.iter().rev() {
            i -= 1;
            assert_eq!(key.index(), i);
            match i {
                0 => assert_eq!(*value, 12),
                1 => assert_eq!(*value, 33),
                _ => panic!(),
            }
        }

        i = 2;
        for (key, value) in m.iter_mut().rev() {
            i -= 1;
            assert_eq!(key.index(), i);
            match i {
                0 => assert_eq!(*value, 12),
                1 => assert_eq!(*value, 33),
                _ => panic!(),
            }
        }
    }
    #[test]
    fn keys() {
        let mut p: PrimaryMap<E, usize> = PrimaryMap::new();