35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
/*
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* Copyright 2018 The Cartographer Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CARTOGRAPHER_COMMON_UTILS_H_
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#define CARTOGRAPHER_COMMON_UTILS_H_
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namespace cartographer {
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namespace common {
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template <typename MapType, typename KeyType = typename MapType::key_type,
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typename ValueType = typename MapType::mapped_type>
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ValueType* FindOrNull(MapType& map, const KeyType& key) {
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auto it = map.find(key);
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if (it == map.end()) return nullptr;
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return &(it->second);
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}
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} // namespace common
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} // namespace cartographer
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#endif // CARTOGRAPHER_COMMON_UTILS_H_
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