1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_ 18 #define NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_ 19 20 21 namespace libtextclassifier3 { 22 namespace mobile { 23 namespace utils { 24 25 // Deletes all the elements in an STL container and clears the container. This 26 // function is suitable for use with a vector, set, hash_set, or any other STL 27 // container which defines sensible begin(), end(), and clear() methods. If 28 // container is NULL, this function is a no-op. 29 template <typename T> 30 void STLDeleteElements(T *container) { 31 if (!container) return; 32 auto it = container->begin(); 33 while (it != container->end()) { 34 auto temp = it; 35 ++it; 36 delete *temp; 37 } 38 container->clear(); 39 } 40 41 } // namespace utils 42 } // namespace mobile 43 } // namespace nlp_saft 44 45 #endif // NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_ 46