Build fix for auto-registration of Container<void*>

IteratorOwner pointer specialization was failing for void* because of
an invalid function overload.

Change-Id: I80355ddd2b871c1fa2fa5bf5a4ed8bc7768fc3c9
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index ad853d5b03..3c9cc9ee28 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -821,7 +821,14 @@ struct IteratorOwner
 template<typename value_type>
 struct IteratorOwner<const value_type*>
 {
-    static void assign(void **ptr, const value_type *iterator )
+private:
+    // We need to disable typed overloads of assign() and getData() if the value_type
+    // is void* to avoid overloads conflicts. We do it by injecting unaccessible Dummy
+    // type as part of the overload signature.
+    struct Dummy {};
+    typedef typename QtPrivate::if_<QtPrivate::is_same<value_type, void*>::value, Dummy, value_type>::type value_type_OR_Dummy;
+public:
+    static void assign(void **ptr, const value_type_OR_Dummy *iterator )
     {
         *ptr = const_cast<value_type*>(iterator);
     }
@@ -846,7 +853,7 @@ struct IteratorOwner<const value_type*>
         return *iterator;
     }
 
-    static const void *getData(const value_type *it)
+    static const void *getData(const value_type_OR_Dummy *it)
     {
         return it;
     }