As stated in D documetation (http://www.digitalmars.com/d/struct.html):

a.. [structure] "alignment can be explicitly specified"

The question is : how?

What notation I should use to define alignof for let's say
struct A
{
   ushort B;
}

Thanks.

On Mon, 21 Mar 2005 16:25:33 -0800, Andrew Fedoniouk <news@terrainformatica.com> wrote:
> As stated in D documetation (http://www.digitalmars.com/d/struct.html):
>
> a.. [structure] "alignment can be explicitly specified"
>
> The question is : how?

See:
http://www.digitalmars.com/d/attribute.html#align

Regan

On Tue, 22 Mar 2005 12:33:48 +1200, Regan Heath wrote:

> On Mon, 21 Mar 2005 16:25:33 -0800, Andrew Fedoniouk <news@terrainformatica.com> wrote:
>> As stated in D documetation (http://www.digitalmars.com/d/struct.html):
>>
>> a.. [structure] "alignment can be explicitly specified"
>>
>> The question is : how?
> 
> See:
> http://www.digitalmars.com/d/attribute.html#align
> 
> Regan

The 'align(x)' attribute is used to tell DMD how to align structures and not the structure members.  To align the members inside a struct you need to set the struct alignment to 1, and then provide explicit fillers for gaps in the RAM mapping.

  align(1) struct MyStruct
  {
     byte A;
     byte[3] filler1;
     byte B;
     byte filler2;
     short C;
  }


-- 
Derek
Melbourne, Australia
22/03/2005 11:38:37 AM

On Tue, 22 Mar 2005 11:42:11 +1100, Derek Parnell wrote:

> On Tue, 22 Mar 2005 12:33:48 +1200, Regan Heath wrote:
> 
>> On Mon, 21 Mar 2005 16:25:33 -0800, Andrew Fedoniouk <news@terrainformatica.com> wrote:
>>> As stated in D documetation (http://www.digitalmars.com/d/struct.html):
>>>
>>> a.. [structure] "alignment can be explicitly specified"
>>>
>>> The question is : how?
>> 
>> See:
>> http://www.digitalmars.com/d/attribute.html#align
>> 
>> Regan
> 
> The 'align(x)' attribute is used to tell DMD how to align structures and not the structure members.  To align the members inside a struct you need to set the struct alignment to 1, and then provide explicit fillers for gaps in the RAM mapping.
> 
>   align(1) struct MyStruct
>   {
>      byte A;
>      byte[3] filler1;
>      byte B;
>      byte filler2;
>      short C;
>   }

Ummmm... should this compile ok?

import std.stdio;
align(1) struct MyStruct
{
   byte A;
   byte[3] filler1;
   byte B;
   byte filler2;
   short C;
}

void main()
{
    MyStruct s;

    writefln("%d %d %d",
            s.A.offsetof,
            s.B.offsetof,
            s.C.offsetof);
}

-- 
Derek
Melbourne, Australia
22/03/2005 11:42:38 AM

Thanks a lot, guys.