fixup! feat(perception_online_evaluator): publish metrics of each object class

Author: kosuke55

evaluator/perception_online_evaluator/src/metrics_calculator.cpp

@@ -40,7 +40,7 @@ std::optional<MetricStatMap> MetricsCalculator::calculate(const Metric & metric)
   const ClassObjectsMap class_objects_map = separateObjectsByClass(target_objects);
 
   // print class and size
-  for (const auto [label, objects] : class_objects_map) {
+  for (const auto & [label, objects] : class_objects_map) {
   }
 
   switch (metric) {
@@ -166,7 +166,7 @@ MetricStatMap MetricsCalculator::calcLateralDeviationMetrics(
   const ClassObjectsMap & class_objects_map) const
 {
   MetricStatMap metric_stat_map{};
-  for (const auto [label, objects] : class_objects_map) {
+  for (const auto & [label, objects] : class_objects_map) {
     Stat<double> stat{};
     const auto stamp = rclcpp::Time(objects.header.stamp);
     for (const auto & object : objects.objects) {
@@ -190,7 +190,7 @@ MetricStatMap MetricsCalculator::calcYawDeviationMetrics(
   const ClassObjectsMap & class_objects_map) const
 {
   MetricStatMap metric_stat_map{};
-  for (const auto [label, objects] : class_objects_map) {
+  for (const auto & [label, objects] : class_objects_map) {
     Stat<double> stat{};
     const auto stamp = rclcpp::Time(objects.header.stamp);
     for (const auto & object : objects.objects) {
@@ -216,7 +216,7 @@ MetricStatMap MetricsCalculator::calcPredictedPathDeviationMetrics(
   const auto time_horizons = parameters_->prediction_time_horizons;
 
   MetricStatMap metric_stat_map{};
-  for (const auto [label, objects] : class_objects_map) {
+  for (const auto & [label, objects] : class_objects_map) {
     for (const double time_horizon : time_horizons) {
       const auto stat = calcPredictedPathDeviationMetrics(objects, time_horizon);
       std::ostringstream stream;