Reintroduce print_fitted_tracks_statistics(...).

But now as a function in the examples code. Not as part of
traccc::core.

Author: krasznaa

examples/run/CMakeLists.txt

@@ -1,6 +1,6 @@
 # TRACCC library, part of the ACTS project (R&D line)
 #
-# (c) 2021-2023 CERN for the benefit of the ACTS project
+# (c) 2021-2025 CERN for the benefit of the ACTS project
 #
 # Mozilla Public License Version 2.0
 
@@ -11,6 +11,8 @@ include( traccc-compiler-options-cpp )
 add_library(traccc_examples_common STATIC
    "common/make_magnetic_field.hpp"
    "common/make_magnetic_field.cpp"
+   "common/print_fitted_tracks_statistics.hpp"
+   "common/print_fitted_tracks_statistics.cpp"
    "common/throughput_mt.hpp"
    "common/throughput_mt.ipp"
    "common/throughput_st.hpp"

examples/run/common/print_fitted_tracks_statistics.cpp

@@ -0,0 +1,38 @@
+/** TRACCC library, part of the ACTS project (R&D line)
+ *
+ * (c) 2025 CERN for the benefit of the ACTS project
+ *
+ * Mozilla Public License Version 2.0
+ */
+
+// Local include(s).
+#include "print_fitted_tracks_statistics.hpp"
+
+namespace traccc::details {
+
+void print_fitted_tracks_statistics(
+    const edm::track_fit_container<default_algebra>::host& tracks,
+    const Logger& log) {
+
+    std::size_t success = 0;
+    std::size_t non_positive_ndf = 0;
+    std::size_t not_all_smoothed = 0;
+
+    for (track_fit_outcome outcome : tracks.tracks.fit_outcome()) {
+        if (outcome == track_fit_outcome::SUCCESS) {
+            ++success;
+        } else if (outcome == track_fit_outcome::FAILURE_NON_POSITIVE_NDF) {
+            ++non_positive_ndf;
+        } else if (outcome == track_fit_outcome::FAILURE_NOT_ALL_SMOOTHED) {
+            ++not_all_smoothed;
+        }
+    }
+
+    auto logger = [&log]() -> const Logger& { return log; };
+    TRACCC_INFO("Success: " << success
+                            << "  Non positive NDF: " << non_positive_ndf
+                            << "  Not all smoothed: " << not_all_smoothed
+                            << "  Total: " << tracks.tracks.size());
+}
+
+}  // namespace traccc::details

examples/run/common/print_fitted_tracks_statistics.hpp

@@ -0,0 +1,25 @@
+/** TRACCC library, part of the ACTS project (R&D line)
+ *
+ * (c) 2025 CERN for the benefit of the ACTS project
+ *
+ * Mozilla Public License Version 2.0
+ */
+
+#pragma once
+
+// Project include(s).
+#include "traccc/edm/track_fit_container.hpp"
+#include "traccc/utils/logging.hpp"
+
+namespace traccc::details {
+
+/// Print statistics for the fitted tracks.
+///
+/// @param tracks The fitted tracks to print statistics for
+/// @param log    The logger to use for outputting the statistics
+///
+void print_fitted_tracks_statistics(
+    const edm::track_fit_container<default_algebra>::host& tracks,
+    const Logger& log);
+
+}  // namespace traccc::details

examples/run/cpu/misaligned_truth_fitting_example.cpp

@@ -7,6 +7,7 @@
 
 // Project include(s).
 #include "../common/make_magnetic_field.hpp"
+#include "../common/print_fitted_tracks_statistics.hpp"
 #include "traccc/definitions/common.hpp"
 #include "traccc/definitions/primitives.hpp"
 #include "traccc/fitting/kalman_fitting_algorithm.hpp"
@@ -166,7 +167,7 @@ int main(int argc, char* argv[]) {
                 {vecmem::get_data(truth_track_candidates.tracks),
                  vecmem::get_data(truth_track_candidates.measurements)});
 
-            // print_fitted_tracks_statistics(track_states);
+            details::print_fitted_tracks_statistics(track_states, logger());
 
             const std::size_t n_fitted_tracks = track_states.tracks.size();
 
@@ -191,7 +192,7 @@ int main(int argc, char* argv[]) {
                 {vecmem::get_data(truth_track_candidates.tracks),
                  vecmem::get_data(truth_track_candidates.measurements)});
 
-            // print_fitted_tracks_statistics(track_states);
+            details::print_fitted_tracks_statistics(track_states, logger());
 
             const std::size_t n_fitted_tracks = track_states.tracks.size();
 

examples/run/cpu/truth_finding_example.cpp

@@ -7,6 +7,7 @@
 
 // Project include(s).
 #include "../common/make_magnetic_field.hpp"
+#include "../common/print_fitted_tracks_statistics.hpp"
 #include "traccc/definitions/common.hpp"
 #include "traccc/definitions/primitives.hpp"
 #include "traccc/efficiency/finding_performance_writer.hpp"
@@ -163,7 +164,7 @@ int seq_run(const traccc::opts::track_finding& finding_opts,
                          {vecmem::get_data(track_candidates),
                           vecmem::get_data(measurements_per_event)});
 
-        // print_fitted_tracks_statistics(track_states);
+        details::print_fitted_tracks_statistics(track_states, logger());
 
         const std::size_t n_fitted_tracks = track_states.tracks.size();
 

examples/run/cpu/truth_fitting_example.cpp

@@ -7,6 +7,7 @@
 
 // Project include(s).
 #include "../common/make_magnetic_field.hpp"
+#include "../common/print_fitted_tracks_statistics.hpp"
 #include "traccc/definitions/common.hpp"
 #include "traccc/definitions/primitives.hpp"
 #include "traccc/fitting/kalman_fitting_algorithm.hpp"
@@ -140,7 +141,7 @@ int main(int argc, char* argv[]) {
             {vecmem::get_data(truth_track_candidates.tracks),
              vecmem::get_data(truth_track_candidates.measurements)});
 
-        // print_fitted_tracks_statistics(track_states);
+        details::print_fitted_tracks_statistics(track_states, logger());
 
         const std::size_t n_fitted_tracks = track_states.tracks.size();