• Steve Adams (11/11) Mar 19 2003 In D, is there a way to express
• Burton Radons (2/15) Mar 19 2003 No.
• DDevil (19/32) Mar 19 2003 Is that written correctly? Why would you have a union of bitfields? Th...

"Steve Adams" <adamss ascinet.com> writes:

In D, is there a way to express

typedef struct {
  struct {
    union {
      unsigned long  F1   : 25;
      unsigned long  F2   :  7;
      };
    unsigned long all;
  };
  } Bitfields;

and still have it fit in a single long?

Burton Radons <loth users.sourceforge.net> writes:

Steve Adams wrote:
 In D, is there a way to express
 
 typedef struct {
   struct {
     union {
       unsigned long  F1   : 25;
       unsigned long  F2   :  7;
       };
     unsigned long all;
   };
   } Bitfields;
 
 and still have it fit in a single long?

No.

"DDevil" <ddevil functionalfuture.com> writes:

On Wed, 19 Mar 2003 10:27:00 -0500, Steve Adams wrote:
 In D, is there a way to express
 
 typedef struct {
   struct {
     union {
       unsigned long  F1   : 25;
       unsigned long  F2   :  7;
       };
     unsigned long all;
   };
   } Bitfields;
 
 and still have it fit in a single long?

Is that written correctly?  Why would you have a union of bitfields?  The
way it's currently written would take more than 4 bytes in C/C++ also.

Do you mean:

typedef struct
{
   union
   {
      struct
      {
         unsigned long  F1 : 25;
         unsigned long  F2 :  7;
      };

      unsigned long all;
   };
} Bitfields;

?  That only takes the space of one long.

--
// DDevil