Add swapItemsAt() to QVector

This closes one compatibility gap with QList, to make
it easier to replace QList with QVector in Qt6.

Change-Id: I5655bc4cd2150a6f09a1ed68c0742f3b42ca47e4
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/corelib/tools/qvector.h b/src/corelib/tools/qvector.h
index 4e148c9c55..b763d6e7e2 100644
--- a/src/corelib/tools/qvector.h
+++ b/src/corelib/tools/qvector.h
@@ -251,6 +251,13 @@ public:
     T value(int i) const;
     T value(int i, const T &defaultValue) const;
 
+    void swapItemsAt(int i, int j) {
+        Q_ASSERT_X(i >= 0 && i < size() && j >= 0 && j < size(),
+                    "QVector<T>::swap", "index out of range");
+        detach();
+        qSwap(d->begin()[i], d->begin()[j]);
+    }
+
     // STL compatibility
     typedef T value_type;
     typedef value_type* pointer;