Make it possible to use QPointer<const T>

This is possible with QWeakPointer, so allow it for migrating
code too.

In the process, replace the QPointerBase with a member variable for
simplicity. The functionality of the QPointerBase is replaced
by a TypeSelector template.

Change-Id: I3b4c77bdeda2b863cc33e84a3da8a25bae928c8c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp b/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
index 7c6549364f..609b4b7dce 100644
--- a/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
+++ b/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
@@ -65,6 +65,7 @@ private slots:
     void threadSafety();
 
     void qvariantCast();
+    void constPointer();
 };
 
 void tst_QPointer::constructors()
@@ -384,6 +385,12 @@ void tst_QPointer::qvariantCast()
 //     QPointer<int> sop = qPointerFromVariant<int>(v);
 }
 
+void tst_QPointer::constPointer()
+{
+    // Compile-time test that QPointer<const T> works.
+    QPointer<const QFile> fp = new QFile;
+    delete fp.data();
+}
 
 
 QTEST_MAIN(tst_QPointer)