I would like to display a expression using a build_struct_transform.

example: I have a struct with 2 pointers. (beg and end). The size is calculated by (m_End - m_Begin)
Is there a why to evaluate the expression and display it ?

I've try this way but that does not work.

Code:
::TV::TTF::RTF::build_struct_transform {
    name   {^struct TME::Text$}
    members {
          { size  { m_End - m_Begin } }
   }
}
I've also tried to call the function which is a member of the struct

Code:
::TV::TTF::RTF::build_struct_transform {
    name   {^struct TME::Text$}
    members {
          { size  { size() } }
    }
}
But I'm probably doing something wrong.

Thanks Phil