| #ifndef COMPARABLE_HPP |
| #define COMPARABLE_HPP |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| |
| ///@cond INTERNAL |
| namespace proton { |
| |
| /// Base class for comparable types with operator< and operator==. Provides remaining operators. |
| template <class T> class comparable {}; |
| |
| template <class T> bool operator>(const comparable<T> &a, const comparable<T> &b) { |
| return static_cast<const T&>(b) < static_cast<const T&>(a); |
| } |
| |
| template <class T> bool operator<=(const comparable<T> &a, const comparable<T> &b) { |
| return !(static_cast<const T&>(a) > static_cast<const T&>(b)); |
| } |
| |
| template <class T> bool operator>=(const comparable<T> &a, const comparable<T> &b) { |
| return !(static_cast<const T&>(a) < static_cast<const T&>(b)); |
| } |
| |
| template <class T> bool operator!=(const comparable<T> &a, const comparable<T> &b) { |
| return !(static_cast<const T&>(a) == static_cast<const T&>(b)); |
| } |
| |
| } |
| |
| ///@endcond |
| |
| #endif // COMPARABLE_HPP |
