00001 #ifndef OMG_DDS_CORE_OPTIONAL_HPP_ 00002 #define OMG_DDS_CORE_OPTIONAL_HPP_ 00003 00004 00005 /* Copyright 2010, Object Management Group, Inc. 00006 * Copyright 2010, PrismTech, Inc. 00007 * Copyright 2010, Real-Time Innovations, Inc. 00008 * All rights reserved. 00009 * 00010 * Licensed under the Apache License, Version 2.0 (the "License"); 00011 * you may not use this file except in compliance with the License. 00012 * You may obtain a copy of the License at 00013 * 00014 * http://www.apache.org/licenses/LICENSE-2.0 00015 * 00016 * Unless required by applicable law or agreed to in writing, software 00017 * distributed under the License is distributed on an "AS IS" BASIS, 00018 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00019 * See the License for the specific language governing permissions and 00020 * limitations under the License. 00021 */ 00022 00023 namespace dds { namespace core { 00024 00030 template <typename T, template <typename Q> class DELEGATE> 00031 class optional : public dds::core::Value< DELEGATE<T> > { 00032 public: 00033 optional(const T& t); 00034 00035 public: 00039 bool is_set() const; 00040 00044 void reset(); 00045 00049 const T& get() const; 00050 00054 T& get(); 00055 }; 00056 00057 } } 00058 #endif /* OMG_DDS_CORE_OPTIONAL_HPP_ */
1.7.1