Code completion and refactoring for local class doesn't work

when i define a local class in a function:

#include <QThread>
...
void MyClass::DoSomething(){
   class MyLocalClass: public QThread{
       int m_my_attribute;
       public: 
       MyLocalClass(){
          
       }
      
       void do_som(){}
 
    };
    MyLocalClass local_class;
}

inside the constructor , m_my_attribute is note accessible via code completion;

i can't insert virtual function of base class with the refactoring contextmenu tool

int m_my_attribute is not colored.

and code completion on variable local_class doesnt work too

I need this functionnality when overriding visitors.
and doesnt have code completion stuff is a pain!