convrt 0.2.0

Utils for conversion between measures
Documentation 
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use macros::{impl_as,impl_from};

/// Represents a length, in millimeters
pub struct Length {
    mm: usize,
}

impl_from!(Length, mm,
    millimeters = ;
    centimeters = 10;
    meters = 100;
);

impl_as!(Length, mm,
    millimeters = ;
    centimeters = 10;
    meters = 10 / 100;
);

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    fn test() {
        let l = Length::from_meters(1);
        assert_eq!(l.as_millimeters(), 100);
        assert_eq!(l.as_centimeters(), 10);
    }
}