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 13namespace skstd { 14 15// std::exchange is in C++14 16template<typename T, typename U = T> 17inline 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