shiboken6: Store AbstractMetaFunction using a QSharedPointer

Store the list functions (global / class member) as a
QList<QSharedPointer<const AbstractMetaFunction> instead of a raw
pointer list. This makes passing around function lists easier and
solves the memory leaks caused by mixing cloned and unmodified
functions while collecting the overload lists in the generators.

- Change the function signatures accordingly
- Add a qSharedPointerConstCast() for non-const access.
- Restructure the traversing of added functions
  in the AbstractMetaBuilder
- Remove some unused typedefs and functions unearthed by
  the change

Change-Id: I08a6c5243750e3eb3813bc3f7172899ad2b13e22
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/sources/shiboken6/ApiExtractor/tests/testreferencetopointer.cpp b/sources/shiboken6/ApiExtractor/tests/testreferencetopointer.cpp
index 6cd719743..b929ebd66 100644
--- a/sources/shiboken6/ApiExtractor/tests/testreferencetopointer.cpp
+++ b/sources/shiboken6/ApiExtractor/tests/testreferencetopointer.cpp
@@ -50,8 +50,8 @@ void TestReferenceToPointer::testReferenceToPointerArgument()
     AbstractMetaClassList classes = builder->classes();
     const AbstractMetaClass *classB = AbstractMetaClass::findClass(classes, QLatin1String("B"));
     QVERIFY(classB);
-    const AbstractMetaFunction* func = classB->findFunction(QLatin1String("dummy"));
-    QVERIFY(func);
+    const auto func = classB->findFunction(QLatin1String("dummy"));
+    QVERIFY(!func.isNull());
     QCOMPARE(func->arguments().constFirst().type().minimalSignature(), QLatin1String("A*&"));
 }