From 696cbc66bed9971d3152cd9fd24e268caf3aec99 Mon Sep 17 00:00:00 2001
From: codesoap <codesoap@mailbox.org>
Date: Sun, 30 Jun 2019 12:40:47 +0200
Subject: [PATCH] c++: Add more explanation to the += overloading example

---
 c++.html.markdown | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/c++.html.markdown b/c++.html.markdown
index 80ad3a6c..fc9f6ce2 100644
--- a/c++.html.markdown
+++ b/c++.html.markdown
@@ -553,10 +553,14 @@ Point Point::operator+(const Point& rhs) const
     return Point(x + rhs.x, y + rhs.y);
 }
 
+// It's good practice to return a reference to the leftmost variable of
+// an assignment. `(a += b) == c` will work this way.
 Point& Point::operator+=(const Point& rhs)
 {
     x += rhs.x;
     y += rhs.y;
+    
+    // `this` is a pointer to the object, on which a method is called.
     return *this;
 }