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 10 template <typename Signature> 11 class OnceCallback; 12 13 template <typename Signature> 14 class RepeatingCallback; 15 16 template <typename Signature> 17 using Callback = RepeatingCallback<Signature>; 18 19 // Syntactic sugar to make Callback<void()> easier to declare since it 20 // will be used in a lot of APIs with delayed execution. 21 using OnceClosure = OnceCallback<void()>; 22 using RepeatingClosure = RepeatingCallback<void()>; 23 using Closure = Callback<void()>; 24 25 } // namespace base 26 27 #endif // BASE_CALLBACK_FORWARD_H_ 28