Implement the move constructor for containers.

This changes all the containers that uses QtPrivate::RefCount
(QMap already had one), and QVariant

In Qt 4.8, it was pointless to have the move constructor because we did
not have quick way to re-initialize a null container. (shared_null still
needed to be refcounted)
But now that we have RefCount, and that the shared_null do not have
reference count, we can implement a fast move constructor that do not generate
code to increment the reference count.

Change-Id: I2bc3c6ae96983f08aa7b1c7cb98d44a89255160b
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@nokia.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/tests/auto/other/collections/tst_collections.cpp b/tests/auto/other/collections/tst_collections.cpp
index 472dd5020e..26e3ccfce4 100644
--- a/tests/auto/other/collections/tst_collections.cpp
+++ b/tests/auto/other/collections/tst_collections.cpp
@@ -2419,6 +2419,14 @@ bool isSharable(const Container &container)
     return !container.isDetached();
 }
 
+template <class Container> Container newInstance() {
+    Container container;
+    populate(container);
+    if (!container.isEmpty())
+        return container;
+    return Container();
+}
+
 template <class Container, class ContainerMutableIterator>
 void testContainer()
 {
@@ -2539,10 +2547,20 @@ void testContainer()
         QVERIFY(!c2.isDetached());
         QVERIFY(!c3.isDetached());
     }
+
+    /* test that the move operators work properly */
+    {
+        Container c1 = Container(newInstance<Container>());
+        QVERIFY(c1.size() == 4);
+        QVERIFY(c1 == newInstance<Container>());
+        c1 = newInstance<Container>();
+        QVERIFY(c1.size() == 4);
+        QVERIFY(c1 == newInstance<Container>());
+    }
 }
 
 #define TEST_SEQUENTIAL_CONTAINER(Container) \
-    testContainer<Q##Container<int>, QMutable##Container##Iterator<int> >()
+    testContainer<Q##Container<int>, QMutable##Container##Iterator<int> >() \
 
 #define TEST_ASSOCIATIVE_CONTAINER(Container) \
     testContainer<Q##Container<int, int>, QMutable##Container##Iterator<int, int> >()