1 files changed, 19 insertions, 1 deletions
diff --git a/src/corelib/tools/qduplicatetracker_p.h b/src/corelib/tools/qduplicatetracker_p.h
index 565d592ac2..8d64ee5371 100644
--- a/src/corelib/tools/qduplicatetracker_p.h
+++ b/src/corelib/tools/qduplicatetracker_p.h
@@ -105,6 +105,13 @@ class QDuplicateTracker {
 #endif
     Q_DISABLE_COPY_MOVE(QDuplicateTracker);
 public:
+    static constexpr inline bool uses_pmr =
+        #ifdef __cpp_lib_memory_resource
+            true
+        #else
+            false
+        #endif
+            ;
     QDuplicateTracker() = default;
     explicit QDuplicateTracker(qsizetype n)
 #ifdef __cpp_lib_memory_resource
@@ -125,11 +132,22 @@ public:
     }
 
     template <typename C>
-    void appendTo(C &c) const
+    void appendTo(C &c) const &
     {
         for (const auto &e : set)
             c.push_back(e);
     }
+
+    template <typename C>
+    void appendTo(C &c) &&
+    {
+        if constexpr (uses_pmr) {
+            while (!set.empty())
+                c.push_back(std::move(set.extract(set.begin()).value()));
+        } else {
+            return appendTo(c); // lvalue version
+        }
+    }
 };
 
 QT_END_NAMESPACE