Stanislav Blinov wrote: >> But bitfields in C may not use the same alignments used by >> bitfields!() on DMD so I think you have to test the sanity of the >> whole thing for each combination of D compiler, operating system and C >> compiler. > > hm... what alignments are you talking about? bitfields template uses the > smallest suitable type for all fields, which is uint for the above > struct. The trouble may come from bit order, mayhaps. bitfields > positions fields in LSb order.
There is almost no guarantee in C (and C++) on how the bitfields are layed out.
I had implemented a C++ template solution once just to overcome that lack of layout. We needed to have our bits layed out exactly in certain ways.
Ali
