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//! Shared mathematical utility functions.


/// Cut value to be inside given range
///
/// ```
/// use image::math::utils;
///
/// assert_eq!(utils::clamp(-5, 0, 10),  0);
/// assert_eq!(utils::clamp( 6, 0, 10),  6);
/// assert_eq!(utils::clamp(15, 0, 10), 10);
/// ```
pub fn clamp<N>(a: N, min: N, max: N) -> N
where N: PartialOrd {
    match () {
        () if a < min => min,
        () if a > max => max,
        _ => a
    }
}