native/lang_id/common/stl-util.h

/*
 * Copyright (C) 2018 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 NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_
#define NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_


namespace libtextclassifier3 {
namespace mobile {
namespace utils {

// 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();
}

}  // namespace utils
}  // namespace mobile
}  // namespace nlp_saft

#endif  // NLP_SAFT_COMPONENTS_COMMON_MOBILE_STL_UTIL_H_