fix warning

src/feature_engineering/category_feature_encoder.hpp

@@ -157,6 +157,7 @@ struct EncodeResult {
 
 class CategoryFeatureEncoderManager {
  public:
+  // NOLINTNEXTLINE
   CategoryFeatureEncoderManager(std::vector<std::unordered_map<int, std::vector<std::unique_ptr<CategoryFeatureEncoder>>>>& train_category_feature_encoders, std::unordered_map<int, std::vector<std::unique_ptr<CategoryFeatureEncoder>>>& category_feature_encoders)
   : train_category_feature_encoders_(std::move(train_category_feature_encoders)), category_feature_encoders_(std::move(category_feature_encoders)) { }
 

src/feature_engineering/category_feature_encoder_manager.cpp

@@ -152,9 +152,9 @@ namespace LightGBM {
 
   std::unique_ptr<CategoryFeatureEncoderManager> CategoryFeatureEncoderManager::Create(json11::Json settings, const CategoryFeatureTargetInformationCollector& informationCollector) {
     const std::vector<int>& categorical_features = informationCollector.GetCategoricalFeatures();
-	const std::vector<std::unordered_map<int, CategoryFeatureTargetInformation>>& category_target_information = informationCollector.GetCategoryTargetInformation();
-	const std::unordered_map<int, CategoryFeatureTargetInformation>& global_category_target_information = informationCollector.GetGlobalCategoryTargetInformation();
-    int fold_count = category_target_information.size();
+    const std::vector<std::unordered_map<int, CategoryFeatureTargetInformation>>& category_target_information = informationCollector.GetCategoryTargetInformation();
+    const std::unordered_map<int, CategoryFeatureTargetInformation>& global_category_target_information = informationCollector.GetGlobalCategoryTargetInformation();
+    size_t fold_count = category_target_information.size();
     std::vector<std::unordered_map<int, std::vector<std::unique_ptr<CategoryFeatureEncoder>>>> train_category_feature_encoders(fold_count);
     std::unordered_map<int, std::vector<std::unique_ptr<CategoryFeatureEncoder>>> category_feature_encoders;
 

src/feature_engineering/category_feature_target_information_collector.cpp

@@ -37,16 +37,16 @@ namespace LightGBM {
     count_.reserve(count_.size() + target_count_record.size());
     count_.insert(count_.end(), target_count_record.begin(), target_count_record.end());
 
-	const std::vector<double>& target_sum_record = collector.GetLabelSum();
+    const std::vector<double>& target_sum_record = collector.GetLabelSum();
     label_sum_.reserve(label_sum_.size() + target_sum_record.size());
     label_sum_.insert(label_sum_.end(), target_sum_record.begin(), target_sum_record.end());
 
-	const std::vector<std::unordered_map<int, CategoryFeatureTargetInformation>>& target_category_target_information = collector.GetCategoryTargetInformation();
+    const std::vector<std::unordered_map<int, CategoryFeatureTargetInformation>>& target_category_target_information = collector.GetCategoryTargetInformation();
     for (auto& entry : target_category_target_information) {
       category_target_information_.push_back(entry);
     }
 
-	const std::unordered_map<int, CategoryFeatureTargetInformation>& global_category_target_information_record = collector.GetGlobalCategoryTargetInformation();
+    const std::unordered_map<int, CategoryFeatureTargetInformation>& global_category_target_information_record = collector.GetGlobalCategoryTargetInformation();
     for (auto& feature_information : global_category_target_information_record) {
       for (auto& category_count : feature_information.second.category_count) {
         global_category_target_information_[feature_information.first].category_count[category_count.first] += category_count.second;