Property access to a struct that contains struct

[Guenter via Digitalmars-d]

Hi,

i do not understand where I am wrong in this code. I seems there 
is a missing constructor, but i have no idea where.


module main;


import std.stdio;


struct A_t
{
   int fvalue;


   A_t opCall()
   {
     return this;
   };

   @property  int value () { return fvalue; }

   @property void value (int avalue) { fvalue = avalue; }
}


struct B_t
{
   A_t  fext;


   int opCall() { return ext.value; };


   @property A_t  ext() { return fext; }

   @property void ext(A_t aext) { fext = aext; }
}



void main()
{
   B_t   test;


   test.ext.value = 9;
   int t = test();

   assert ( t == 9);   //  t  is always 0 instead of 9.


   readln();
}


cu
Guenter