---

yaml
---
r: 341434
b: refs/heads/rxwei-patch-1
c: 259571a
h: refs/heads/master

Author: rxwei

[refs]

@@ -1015,7 +1015,7 @@ refs/tags/swift-DEVELOPMENT-SNAPSHOT-2018-08-18-a: b10b1fce14385faa6d44f6b933e95
 refs/heads/rdar-43033749-fix-batch-mode-no-diags-swift-5.0-branch: a14e64eaad30de89f0f5f0b2a782eed7ecdcb255
 refs/heads/revert-19006-error-bridging-integer-type: 8a9065a3696535305ea53fe9b71f91cbe6702019
 refs/heads/revert-19050-revert-19006-error-bridging-integer-type: ecf752d54b05dd0a20f510f0bfa54a3fec3bcaca
-refs/heads/rxwei-patch-1: 0a22ab7099a6e0df62f6c44fddbbffaa93b2c5cd
+refs/heads/rxwei-patch-1: 259571a7f7d95472fe53270a21951702efa02d8b
 refs/heads/shahmishal-patch-1: e58ec0f7488258d42bef51bc3e6d7b3dc74d7b2a
 refs/heads/typelist-existential: 4046359efd541fb5c72d69a92eefc0a784df8f5e
 refs/tags/swift-4.2-DEVELOPMENT-SNAPSHOT-2018-08-20-a: 4319ba09e4fb8650ee86061075c74a016b6baab9

branches/rxwei-patch-1/stdlib/public/core/Integers.swift

@@ -128,6 +128,18 @@ public protocol AdditiveArithmetic : Equatable {
   static func -=(lhs: inout Self, rhs: Self)
 }
 
+public extension AdditiveArithmetic {
+  @_alwaysEmitIntoClient
+  static func +=(lhs: inout Self, rhs: Self) {
+    lhs = lhs + rhs
+  }
+
+  @_alwaysEmitIntoClient
+  static func -=(lhs: inout Self, rhs: Self) {
+    lhs = lhs - rhs
+  }
+}
+
 public extension AdditiveArithmetic where Self : ExpressibleByIntegerLiteral {
   /// The zero value.
   ///