| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef LIBTEXTCLASSIFIER_UTIL_GTL_STL_UTIL_H_ |
| #define LIBTEXTCLASSIFIER_UTIL_GTL_STL_UTIL_H_ |
| |
| namespace libtextclassifier2 { |
| |
| // Deletes all the elements in an STL container and clears the container. This |
| // function is suitable for use with a vector, set, hash_set, or any other STL |
| // container which defines sensible begin(), end(), and clear() methods. |
| // If container is NULL, this function is a no-op. |
| template <typename T> |
| void STLDeleteElements(T *container) { |
| if (!container) return; |
| auto it = container->begin(); |
| while (it != container->end()) { |
| auto temp = it; |
| ++it; |
| delete *temp; |
| } |
| container->clear(); |
| } |
| |
| // Given an STL container consisting of (key, value) pairs, STLDeleteValues |
| // deletes all the "value" components and clears the container. Does nothing in |
| // the case it's given a nullptr. |
| template <typename T> |
| void STLDeleteValues(T *container) { |
| if (!container) return; |
| auto it = container->begin(); |
| while (it != container->end()) { |
| auto temp = it; |
| ++it; |
| delete temp->second; |
| } |
| container->clear(); |
| } |
| |
| } // namespace libtextclassifier2 |
| |
| #endif // LIBTEXTCLASSIFIER_UTIL_GTL_STL_UTIL_H_ |