Add QNodePrivate::registerDestructionHelper for std::vector containers

Ideally should support generic containers but clang seems to fail to
generate the symbol on the mac.

Change-Id: Ic1d6d815ab9aff60a97b3b0047228f55d7efe158
Pick-to: 5.15
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/core/nodes/qnode_p.h b/src/core/nodes/qnode_p.h
index 67d52cec7..9e8295156 100644
--- a/src/core/nodes/qnode_p.h
+++ b/src/core/nodes/qnode_p.h
@@ -54,6 +54,7 @@
 #include <Qt3DCore/qnode.h>
 
 #include <functional>
+#include <vector>
 
 #include <Qt3DCore/private/propertychangehandler_p.h>
 #include <Qt3DCore/private/qchangearbiter_p.h>
@@ -133,6 +134,15 @@ public:
         m_destructionConnections.push_back({node, QObject::connect(node, &QNode::nodeDestroyed, f)});
     }
 
+    template<typename Caller, typename NodeType>
+    void registerDestructionHelper(NodeType *node, DestructionFunctionPointer<Caller, NodeType> func, std::vector<NodeType*> &)
+    {
+        // If the node is destoyed, we make sure not to keep a dangling pointer to it
+        Q_Q(QNode);
+        auto f = [q, func, node]() { (static_cast<Caller *>(q)->*func)(node); };
+        m_destructionConnections.push_back({node, QObject::connect(node, &QNode::nodeDestroyed, f)});
+    }
+
     template<typename Caller, typename ValueType>
     using DestructionFunctionValue = void (Caller::*)(const ValueType&);