learn_rust_bugs 0.1.0

Self-learning Rust
Documentation 
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//!
//! # Overload
//! overload crate description:
//! overload the `+` operator
//!

use std::ops::Add;

pub struct MilliMeter(pub u32);
struct Meter(u32);

impl Add<Meter> for MilliMeter {
    type Output = MilliMeter;
    fn add(self, rhs: Meter) -> Self::Output {
        MilliMeter(self.0 + rhs.0 * 1000)
    }
}

/// MilliMeter + MilliMeter = MilliMeter
///
/// # Example
/// ```
/// use library::overload::MilliMeter;
///
/// let a = MilliMeter(1);
/// let b = MilliMeter(2);
/// let c = a + b;
/// assert_eq!(c.0, 3);
/// ```
///
impl Add for MilliMeter {
    type Output = MilliMeter;
    fn add(self, rhs: Self) -> Self::Output {
        MilliMeter(self.0 + rhs.0)
    }
}

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

    #[test]
    fn add() {
        let milli1 = MilliMeter(1);
        let milli2 = MilliMeter(2);
        let meter = Meter(1);
        assert_eq!((milli1 + milli2).0, 3);
        assert_eq!((MilliMeter(1) + meter).0, 1001);
    }
}