wz_reader 0.0.20

A wz file reader to resolve wz file with thread safe
Documentation 
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use std::fmt;
use std::ops::{Add, Div, Mul, Sub};

#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};

#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Vector2D(pub i32, pub i32);

impl Vector2D {
    pub fn new(x: i32, y: i32) -> Vector2D {
        Vector2D(x, y)
    }
    pub fn distance(&self, other: &Vector2D) -> f64 {
        let x = (other.0 - self.0) as f64;
        let y = (other.1 - self.1) as f64;
        (x * x + y * y).sqrt()
    }
}

impl fmt::Display for Vector2D {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({}, {})", self.0, self.1)
    }
}

impl Add for Vector2D {
    type Output = Vector2D;

    fn add(self, other: Vector2D) -> Vector2D {
        Vector2D(self.0 + other.0, self.1 + other.1)
    }
}

impl Sub for Vector2D {
    type Output = Vector2D;

    fn sub(self, other: Vector2D) -> Vector2D {
        Vector2D(self.0 - other.0, self.1 - other.1)
    }
}

impl Mul for Vector2D {
    type Output = Vector2D;

    fn mul(self, other: Vector2D) -> Vector2D {
        Vector2D(self.0 * other.0, self.1 * other.1)
    }
}

impl Div for Vector2D {
    type Output = Vector2D;

    fn div(self, other: Vector2D) -> Vector2D {
        Vector2D(self.0 / other.0, self.1 / other.1)
    }
}

#[cfg(feature = "serde")]
#[cfg(test)]
mod test {
    use super::*;
    use serde_json;

    #[test]
    fn test_vector2d_serde() {
        let vector = Vector2D::new(1, 2);
        let json = serde_json::to_string(&vector).unwrap();
        assert_eq!(json, r#"[1,2]"#);

        let vector: Vector2D = serde_json::from_str(r#"[1,2]"#).unwrap();
        assert_eq!(vector, Vector2D::new(1, 2));
    }
}