From e37445124931e1a0cb5af78af84adb9c21b8d843 Mon Sep 17 00:00:00 2001
From: Isis Lovecruft <isis@torproject.org>
Date: Thu, 18 May 2017 23:02:39 +0000
Subject: [PATCH] Implement {AddAssign, SubAssign} for DecafPoint.

---
 src/decaf.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/decaf.rs b/src/decaf.rs
index a97347f..4c4cd6c 100644
--- a/src/decaf.rs
+++ b/src/decaf.rs
@@ -36,6 +36,7 @@ use subtle::CTAssignable;
 use subtle::CTNegatable;
 
 use core::ops::{Add, Sub, Neg};
+use core::ops::{AddAssign, SubAssign};
 use core::ops::{Mul, MulAssign};
 
 use curve;
@@ -427,6 +428,12 @@ impl<'a, 'b> Add<&'b DecafPoint> for &'a DecafPoint {
     }
 }
 
+impl<'b> AddAssign<&'b DecafPoint> for DecafPoint {
+    fn add_assign(&mut self, _rhs: &DecafPoint) {
+        *self = (self as &DecafPoint) + _rhs;
+    }
+}
+
 impl<'a, 'b> Sub<&'b DecafPoint> for &'a DecafPoint {
     type Output = DecafPoint;
 
@@ -435,6 +442,12 @@ impl<'a, 'b> Sub<&'b DecafPoint> for &'a DecafPoint {
     }
 }
 
+impl<'b> SubAssign<&'b DecafPoint> for DecafPoint {
+    fn sub_assign(&mut self, _rhs: &DecafPoint) {
+        *self = (self as &DecafPoint) - _rhs;
+    }
+}
+
 impl<'a> Neg for &'a DecafPoint {
     type Output = DecafPoint;