1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_CALLBACK_FORWARD_H_ 6 #define BASE_CALLBACK_FORWARD_H_ 7 8 namespace base { 9 namespace internal { 10 11 // CopyMode is used to control the copyablity of a Callback. 12 // MoveOnly indicates the Callback is not copyable but movable, and Copyable 13 // indicates it is copyable and movable. 14 enum class CopyMode { 15 MoveOnly, Copyable, 16 }; 17 18 } // namespace internal 19 20 template <typename Signature, 21 internal::CopyMode copy_mode = internal::CopyMode::Copyable> 22 class Callback; 23 24 // Syntactic sugar to make Callback<void()> easier to declare since it 25 // will be used in a lot of APIs with delayed execution. 26 using Closure = Callback<void()>; 27 28 } // namespace base 29 30 #endif // BASE_CALLBACK_FORWARD_H_ 31
