extern(C) enum

[bitwise]

On Monday, 18 September 2017 at 00:12:49 UTC, Mike Parker wrote:
> On Sunday, 17 September 2017 at 19:16:06 UTC, bitwise wrote:
>> [...]
>
> I've been maintaining bindings to multiple C libraries 
> (including Freetype 2 bindings) for 13 years now. I have never 
> encountered an issue with an enum size mismatch. That's not to 
> say I never will.

For which platforms?

I would have to actually go through the specs for each compiler 
of each platform to make sure before I felt comfortable accepting 
that int-sized enums were defacto standard.

I would be worried about iOS, for example.

The following code will run fine on Windows, but crash on iOS due 
to the misaligned access:

char data[8];
int i = 0xFFFFFFFF;
int* p = (int*)&data[1];
*p++ = i;
*p++ = i;
*p++ = i;

I remember this issue presenting due to a poorly written 
serializer I used once (no idea who wrote it ;) and it makes me 
wonder what kind of other subtle differences there may be.

I think there may be a few (clang and gcc?) different choices of 
compiler for Android NDK as well.