| // Copyright (C) 2012 The Libphonenumber Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // Author: Philippe Liard. |
| // |
| // Light implementation emulating base/callback.h. This is an internal header, |
| // users should not depend on it. |
| // Note that this implementation is very limited for now and |
| // libphonenumber-specific. |
| |
| #ifndef I18N_PHONENUMBERS_CALLBACK_H_ |
| #define I18N_PHONENUMBERS_CALLBACK_H_ |
| |
| namespace i18n { |
| namespace phonenumbers { |
| |
| template <typename R, typename A1, typename A2, typename A3, typename A4> |
| class ResultCallback4 { |
| public: |
| virtual ~ResultCallback4() {} |
| virtual R Run(A1 a1, A2 a2, A3 a3, A4 a4) = 0; |
| }; |
| |
| template <typename R, typename A1, typename A2, typename A3, typename A4> |
| class FunctionCallback4 : public ResultCallback4<R, A1, A2, A3, A4> { |
| public: |
| typedef R (FunctionType)(A1, A2, A3, A4); |
| |
| explicit FunctionCallback4(FunctionType* function) : function_(function) {} |
| virtual ~FunctionCallback4() {} |
| |
| virtual R Run(A1 a1, A2 a2, A3 a3, A4 a4) { |
| return function_(a1, a2, a3, a4); |
| } |
| |
| private: |
| FunctionType* const function_; |
| }; |
| |
| template <typename T, typename R, typename A1, typename A2, typename A3, |
| typename A4> |
| class ConstMethodCallback4 : public ResultCallback4<R, A1, A2, A3, A4> { |
| public: |
| typedef R (T::*MethodType)(A1, A2, A3, A4) const; |
| |
| ConstMethodCallback4(const T* instance, MethodType method) |
| : instance_(instance), |
| method_(method) {} |
| virtual ~ConstMethodCallback4() {} |
| |
| virtual R Run(A1 a1, A2 a2, A3 a3, A4 a4) { |
| return (instance_->*method_)(a1, a2, a3, a4); |
| } |
| |
| private: |
| const T* const instance_; |
| MethodType const method_; |
| }; |
| |
| template <typename R, typename A1, typename A2, typename A3, typename A4> |
| ResultCallback4<R, A1, A2, A3, A4>* NewPermanentCallback( |
| R (*function)(A1, A2, A3, A4)) { |
| return new FunctionCallback4<R, A1, A2, A3, A4>(function); |
| } |
| |
| template <typename T, typename R, typename A1, typename A2, typename A3, |
| typename A4> |
| ResultCallback4<R, A1, A2, A3, A4>* NewPermanentCallback( |
| const T* instance, |
| R (T::*method)(A1, A2, A3, A4) const) { |
| return new ConstMethodCallback4<T, R, A1, A2, A3, A4>(instance, method); |
| } |
| |
| } // namespace phonenumbers |
| } // namespace i18n |
| |
| #endif // I18N_PHONENUMBERS_CALLBACK_H_ |