Top-Down Structs

[John C]

Bob W wrote:
> After using some Win32 declarations, wich are
> obviously not part of "std.c.windows.windows",
> I have noticed that a resulting program crashes with
> 
>     "Error: Win32 Exception" .
> 
> This happens if the main structure ("INPUT_RECORD")
> is declared before the other structures contained in
> the main structure. The problem will not arise if
> sub-structs [B] are declared earlier than the main
> struct [A].
> 
> Before that incident I was convinced that the
> D compiler would handle "top-down" declarations
> correctly.
> 
> 
> 
> ----- "Problematic" declaration sequence: -----
> 
> 
> // INPUT_RECORD [A]
> 
> struct INPUT_RECORD {
>   WORD EventType;
>   union {
>     KEY_EVENT_RECORD KeyEvent;
>     MOUSE_EVENT_RECORD MouseEvent;
>     WINDOW_BUFFER_SIZE_RECORD WindowBufferSizeEvent;
>     MENU_EVENT_RECORD MenuEvent;
>     FOCUS_EVENT_RECORD FocusEvent;
> } }
> 
> 
> // Structs contained in INPUT_RECORD [B]
> 
> struct KEY_EVENT_RECORD {
>   BOOL bKeyDown;
>   WORD wRepeatCount;
>   WORD wVirtualKeyCode;
>   WORD wVirtualScanCode;
>   union  {  WCHAR UnicodeChar;  CHAR AsciiChar;  }
>   DWORD dwControlKeyState;
> }
> 
> struct MOUSE_EVENT_RECORD {
>   COORD dwMousePosition;
>   DWORD dwButtonState;
>   DWORD dwControlKeyState;
>   DWORD dwEventFlags;
> }
> 
> struct WINDOW_BUFFER_SIZE_RECORD { COORD dwSize; }
> struct MENU_EVENT_RECORD { UINT dwCommandId; }
> struct FOCUS_EVENT_RECORD { BOOL bSetFocus; }
> 
> 
> 

Couldn't repro on my Windows XP machine. Runs without throwing 
exceptions here.