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/// Describes the relative rotation of a vector. Negative numbers represent
/// reverse (leftmost) rotations and positive numbers represent forward (rightmost)
/// rotations. Zero represents no rotation.
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Rotation(pub i32);

impl Rotation {
    /// The current location in the evaluation domain
    pub fn cur() -> Rotation {
        Rotation(0)
    }

    /// The previous location in the evaluation domain
    pub fn prev() -> Rotation {
        Rotation(-1)
    }

    /// The next location in the evaluation domain
    pub fn next() -> Rotation {
        Rotation(1)
    }
}