Autocompletion of included class members does not work

Since we share some code between the ARM (C++) and the DSP (C) and we encapsulate the enums in their classes, we have to write something like this:

 
class A
{
    /* Enumerations */
    #include "A_Enums.h"
};

with A_Enums.h

 
enum ABC
{
     ABC_hugo,
     ABC_fred
};

Now when want to access A::ABC_hugo and I press CTRL+Space after "A::ABC_" the auto completion does not work. In the other editors my team uses it's working fine...