core: Move elememts from one vector to the final one

jupp0r · Jul 3, 2019 · 7fcba1f · 7fcba1f
1 parent 86360e1
commit 7fcba1f
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/core/src/registry.cc b/core/src/registry.cc
@@ -1,13 +1,16 @@
 #include "prometheus/registry.h"
 
+#include <iterator>
+
 namespace prometheus {
 
 std::vector<MetricFamily> Registry::Collect() {
   std::lock_guard<std::mutex> lock{mutex_};
   auto results = std::vector<MetricFamily>{};
   for (auto&& collectable : collectables_) {
     auto metrics = collectable->Collect();
-    results.insert(results.end(), metrics.begin(), metrics.end());
+    results.insert(results.end(), std::make_move_iterator(metrics.begin()),
+                   std::make_move_iterator(metrics.end()));
   }
 
   return results;