absolute_unit 0.11.4

A unit system for Rust's type system to catch unit errors in your physical calculations.
Documentation 
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use crate::{MassUnit, Unit};

#[derive(Clone, Copy, Debug, Default, Eq, Ord, PartialEq, PartialOrd)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "bevy_reflect", derive(bevy_reflect::Reflect))]
pub struct PoundsMass;
impl Unit for PoundsMass {
    const UNIT_NAME: &'static str = "pounds";
    const UNIT_SHORT_NAME: &'static str = "lb";
    const UNIT_SUFFIX: &'static str = "lb";
}
impl MassUnit for PoundsMass {
    const GRAMS_IN_UNIT: f64 = 453.592_37;
}

#[macro_export]
macro_rules! pounds_mass {
    ($num:expr) => {
        $crate::Mass::<$crate::PoundsMass>::from(&$num)
    };
}

#[macro_export]
macro_rules! pounds_mass_per_second {
    ($num:expr) => {
        $crate::MassRate::<$crate::PoundsMass, $crate::Seconds>::from(&$num)
    };
}

#[macro_export]
macro_rules! pounds_per_feet3 {
    ($num:expr) => {
        $crate::Density::<$crate::PoundsMass, $crate::Feet>::from(&$num)
    };
}