title: Is should be 12 size of mentioned class?
body: <p>Please share your thoughts about this:</p>
  
  <pre><code> class A
     {
       union {
         unsigned int _dummy_drc[2];
         struct {
           unsigned int _trans_drc :1;
           unsigned int _cap_drc :1;
           unsigned int _fanout_drc :1;
           unsigned int _trans_drc_index :10;
           unsigned int _cap_drc_index :10;
           unsigned int _fanout_drc_index :10;
        };
      };
    };
  </code></pre>
  
  <p>Is it should be 12 and why?</p>