ImportC and #pragma pack

[Dukc]

On Thursday, 30 September 2021 at 00:53:27 UTC, Walter Bright 
wrote:
> Besides, the #pragma pack is never properly documented. For 
> example,
>
>     struct S
>     #pragma pack(1)
>     { ...
>     #pragma pack()
>       ...
>     };
>
> supposed to do? It wretchedly mixes up the preprocessor and the 
> core language syntax in a completely undocumented manner (and 
> they're supposed to be separate languages).

Let's see. Since it's not documented, it'd be unwise to write a 
struct like that. So, if I somehow had a C struct like that, I'd 
want an error. Then I'd move `#pragma pack(1)` either above or 
below the whole struct start depending on what I meant.

Well, there might be some unwritten convention on how the 
compilers handle this but as long as we are not aware of one, 
it's best to do the right thing.