// Copyright 2015 The Crashpad Authors // // 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 CRASHPAD_UTIL_STDLIB_MAP_INSERT_H_ #define CRASHPAD_UTIL_STDLIB_MAP_INSERT_H_ #include <map> #include <utility> namespace crashpad { //! \brief Inserts a mapping from \a key to \a value into \a map, or replaces //! an existing mapping so that \a key maps to \a value. //! //! This behaves similarly to `std::map<>::%insert_or_assign()` proposed for //! C++17, except that the \a old_value parameter is added. //! //! \param[in,out] map The map to operate on. //! \param[in] key The key that should be mapped to \a value. //! \param[in] value The value that \a key should map to. //! \param[out] old_value If \a key was previously present in \a map, this will //! be set to its previous value. This parameter is optional and may be //! `nullptr` if this information is not required. //! //! \return `false` if \a key was previously present in \a map. If \a old_value //! is not `nullptr`, it will be set to the previous value. `true` if \a //! key was not present in the map and was inserted. template <typename T> bool MapInsertOrReplace(T* map, const typename T::key_type& key, const typename T::mapped_type& value, typename T::mapped_type* old_value) { … } } // namespace crashpad #endif // CRASHPAD_UTIL_STDLIB_MAP_INSERT_H_