Top-Down Structs

[Bob W]

"Regan Heath" <regan at netwin.co.nz> wrote in message 
news:ops6amc90r23k2f5 at nrage.netwin.co.nz...
> On Sun, 12 Mar 2006 02:02:48 +0100, Bob W <nospam at aol.com> wrote:
>> I just wanted to add this info:
>>
>> Check INPUT_RECORD.sizeof if it is declared before
>> and after its related sub-structs. In the first case
>> the size of INPUT_RECORD will be 4, otherwise the
>> size is 20.
>
> Interestingly naming the union fixes the problem. eg.
>
> struct INPUT_RECORD {
> WORD EventType;
> union bob {
> KEY_EVENT_RECORD KeyEvent;
> MOUSE_EVENT_RECORD MouseEvent;
> WINDOW_BUFFER_SIZE_RECORD WindowBufferSizeEvent;
> MENU_EVENT_RECORD MenuEvent;
> FOCUS_EVENT_RECORD FocusEvent;
> }
> bob a;
> }
>
> (rest of wrong declaration order as given by OP)
>
> results in an INPUT_RECORD.sizeof of 20. I think the bug lies in the 
> handling of anonymous unions.
>
> Regan

Good job! Looks like a usable workaround. But in the long term I would
rather like to see the D compiler to stick to its promises:

"anonymous structs/unions are allowed as members of other structs/unions"