From d9a5d7a578b4f1d01a91f295cd43e3c503b41cb0 Mon Sep 17 00:00:00 2001
From: Eloy Coto <eloy.coto@gmail.com>
Date: Wed, 17 May 2017 18:51:21 +0100
Subject: [PATCH] Added AddAssign method on Point2D

---
 src/point.rs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/point.rs b/src/point.rs
index 8e6986a4..4503c56a 100644
--- a/src/point.rs
+++ b/src/point.rs
@@ -15,7 +15,7 @@ use size::TypedSize2D;
 use num::*;
 use num_traits::{Float, NumCast};
 use std::fmt;
-use std::ops::{Add, Neg, Mul, Sub, Div};
+use std::ops::{Add, Neg, Mul, Sub, Div, AddAssign};
 use std::marker::PhantomData;
 
 define_matrix! {
@@ -129,6 +129,12 @@ impl<T: Copy + Add<T, Output=T>, U> Add for TypedPoint2D<T, U> {
     }
 }
 
+impl<T: Copy + Add<T, Output=T>, U> AddAssign for TypedPoint2D<T, U> {
+    fn add_assign(&mut self, other: TypedPoint2D<T, U>){
+        *self = *self + other
+    }
+}
+
 impl<T: Copy + Add<T, Output=T>, U> Add<TypedSize2D<T, U>> for TypedPoint2D<T, U> {
     type Output = TypedPoint2D<T, U>;
     fn add(self, other: TypedSize2D<T, U>) -> TypedPoint2D<T, U> {
@@ -888,6 +894,14 @@ mod typedpoint2d {
         assert_eq!(result, Point2DMm::new(4.0, 6.0));
     }
 
+    #[test]
+    pub fn test_add_assign() {
+        let mut p1 = Point2DMm::new(1.0, 2.0);
+        p1 += Point2DMm::new(3.0, 4.0);
+
+        assert_eq!(p1, Point2DMm::new(4.0, 6.0));
+    }
+
     #[test]
     pub fn test_scalar_mul() {
         let p1 = Point2DMm::new(1.0, 2.0);