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-rw-r--r--c++.html.markdown4
1 files changed, 4 insertions, 0 deletions
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;
}