Add qobject_cast operators for std::shared_ptr

Mimicking what we currently have for QSharedPointer, but also adding
* snake_case version (matching the ones in std)
* rvalue-overloaded versions (matching the C++2a overloads).

[ChangeLog][QtCore][QSharedPointer] Overloads of
qSharedPointerObjectCast have been added to work on std::shared_ptr.

Change-Id: I26ddffd82b000bf876e7c141fdce86a7b8c1d75a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp b/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
index 19b2aa02f3..3e87a506bf 100644
--- a/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
+++ b/tests/auto/corelib/tools/qsharedpointer/tst_qsharedpointer.cpp
@@ -78,6 +78,7 @@ private slots:
     void sharedPointerFromQObjectWithWeak();
     void weakQObjectFromSharedPointer();
     void objectCast();
+    void objectCastStdSharedPtr();
     void differentPointers();
     void virtualBaseDifferentPointers();
 #ifndef QTEST_NO_RTTI
@@ -1113,6 +1114,60 @@ void tst_QSharedPointer::objectCast()
     safetyCheck();
 }
 
+
+void tst_QSharedPointer::objectCastStdSharedPtr()
+{
+    {
+        OtherObject *data = new OtherObject;
+        std::shared_ptr<QObject> baseptr = std::shared_ptr<QObject>(data);
+        QVERIFY(baseptr.get() == data);
+
+        // perform successful object cast
+        std::shared_ptr<OtherObject> ptr = qobject_pointer_cast<OtherObject>(baseptr);
+        QVERIFY(ptr.get());
+        QVERIFY(ptr.get() == data);
+
+        QVERIFY(baseptr.get() == data);
+    }
+
+    {
+        OtherObject *data = new OtherObject;
+        std::shared_ptr<QObject> baseptr = std::shared_ptr<QObject>(data);
+        QVERIFY(baseptr.get() == data);
+
+        // perform successful object cast
+        std::shared_ptr<OtherObject> ptr = qobject_pointer_cast<OtherObject>(std::move(baseptr));
+        QVERIFY(ptr.get());
+        QVERIFY(ptr.get() == data);
+
+        QVERIFY(!baseptr.get());
+    }
+
+    {
+        QObject *data = new QObject;
+        std::shared_ptr<QObject> baseptr = std::shared_ptr<QObject>(data);
+        QVERIFY(baseptr.get() == data);
+
+        // perform unsuccessful object cast
+        std::shared_ptr<OtherObject> ptr = qobject_pointer_cast<OtherObject>(baseptr);
+        QVERIFY(!ptr.get());
+
+        QVERIFY(baseptr.get() == data);
+    }
+
+    {
+        QObject *data = new QObject;
+        std::shared_ptr<QObject> baseptr = std::shared_ptr<QObject>(data);
+        QVERIFY(baseptr.get() == data);
+
+        // perform unsuccessful object cast
+        std::shared_ptr<OtherObject> ptr = qobject_pointer_cast<OtherObject>(std::move(baseptr));
+        QVERIFY(!ptr.get());
+
+        QVERIFY(baseptr.get() == data);
+    }
+}
+
 void tst_QSharedPointer::differentPointers()
 {
     {