Open Chinese Convert
1.0.3
A project for conversion between Traditional and Simplified Chinese
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00001 /* 00002 * Open Chinese Convert 00003 * 00004 * Copyright 2010-2014 BYVoid <byvoid@byvoid.com> 00005 * 00006 * Licensed under the Apache License, Version 2.0 (the "License"); 00007 * you may not use this file except in compliance with the License. 00008 * You may obtain a copy of the License at 00009 * 00010 * http://www.apache.org/licenses/LICENSE-2.0 00011 * 00012 * Unless required by applicable law or agreed to in writing, software 00013 * distributed under the License is distributed on an "AS IS" BASIS, 00014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00015 * See the License for the specific language governing permissions and 00016 * limitations under the License. 00017 */ 00018 00019 #pragma once 00020 00021 namespace opencc { 00026 template <typename T> class Optional { 00027 public: 00031 Optional(T actual) : isNull(false), data(actual) {} 00032 00036 bool IsNull() const { return isNull; } 00037 00041 const T& Get() const { return data; } 00042 00046 static Optional<T> Null() { return Optional(); } 00047 00048 private: 00049 Optional() : isNull(true) {} 00050 00051 bool isNull; 00052 T data; 00053 }; 00054 00060 template <typename T> class Optional<T*> { 00061 private: 00062 Optional() : data(nullptr) {} 00063 00064 typedef T* TPtr; 00065 TPtr data; 00066 00067 public: 00068 Optional(TPtr actual) : data(actual) {} 00069 00070 bool IsNull() const { return data == nullptr; } 00071 00072 const TPtr& Get() const { return data; } 00073 00074 static Optional<TPtr> Null() { return Optional(); } 00075 }; 00076 }