lab 0.11.0

Tools for converting RGB colors to the CIE-L*a*b* color space, and comparing differences in color.
Documentation 
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use crate::{LCh, Lab};
use approx::{AbsDiffEq, RelativeEq};

impl AbsDiffEq<Lab> for Lab {
    type Epsilon = f32;

    fn default_epsilon() -> Self::Epsilon {
        std::f32::EPSILON
    }

    fn abs_diff_eq(&self, other: &Lab, epsilon: Self::Epsilon) -> bool {
        AbsDiffEq::abs_diff_eq(&self.l, &other.l, epsilon)
            && AbsDiffEq::abs_diff_eq(&self.a, &other.a, epsilon)
            && AbsDiffEq::abs_diff_eq(&self.b, &other.b, epsilon)
    }
}

impl RelativeEq<Lab> for Lab {
    fn default_max_relative() -> Self::Epsilon {
        std::f32::EPSILON
    }

    fn relative_eq(
        &self,
        other: &Lab,
        epsilon: Self::Epsilon,
        max_relative: Self::Epsilon,
    ) -> bool {
        RelativeEq::relative_eq(&self.l, &other.l, epsilon, max_relative)
            && RelativeEq::relative_eq(&self.a, &other.a, epsilon, max_relative)
            && RelativeEq::relative_eq(&self.b, &other.b, epsilon, max_relative)
    }
}

impl AbsDiffEq<LCh> for LCh {
    type Epsilon = f32;

    fn default_epsilon() -> Self::Epsilon {
        std::f32::EPSILON
    }

    fn abs_diff_eq(&self, other: &LCh, epsilon: Self::Epsilon) -> bool {
        AbsDiffEq::abs_diff_eq(&self.l, &other.l, epsilon)
            && AbsDiffEq::abs_diff_eq(&self.c, &other.c, epsilon)
            && AbsDiffEq::abs_diff_eq(&self.h, &other.h, epsilon)
    }
}

impl RelativeEq<LCh> for LCh {
    fn default_max_relative() -> Self::Epsilon {
        std::f32::EPSILON
    }

    fn relative_eq(
        &self,
        other: &LCh,
        epsilon: Self::Epsilon,
        max_relative: Self::Epsilon,
    ) -> bool {
        RelativeEq::relative_eq(&self.l, &other.l, epsilon, max_relative)
            && RelativeEq::relative_eq(&self.c, &other.c, epsilon, max_relative)
            && RelativeEq::relative_eq(&self.h, &other.h, epsilon, max_relative)
    }
}