1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkExchange_DEFINED 9 #define SkExchange_DEFINED 10 11 #include <utility> 12 13 namespace skstd { 14 15 // std::exchange is in C++14 16 template<typename T, typename U = T> 17 inline static T exchange(T& obj, U&& new_val) { 18 T old_val = std::move(obj); 19 obj = std::forward<U>(new_val); 20 return old_val; 21 } 22 23 } 24 25 #endif // SkExchange_DEFINED 26
