On Monday, 2 December 2024 at 19:15:07 UTC, Ali Çehreli wrote:
On 12/2/24 9:03 AM, Basile B. wrote:
I've noticed that empty struct are always at least a size of
1, see [D explorer](https://godbolt.org/z/sGYcex4cf). There
you can see `%example.S = type { [1 x i8] }`
So te compiler inserts a dummy member so that that everything
can work as usual.
Big question is what is the problem if we specify that empty
struct is an error ?
Then you couldn't have arrays of them where elements having
different addresses. Because of size being 1, today this passes:
struct S {}
void main() {
S[2] ses;
assert(&ses[0] != &ses[1]);
}
Ali
The question was also "is it a problem to make empty structs an
error".
Anyway thanks to all for your answers but it turns out that the
reason why I opened the topic was not right. It was related to a
bug in styx, that happens also with non-empty structs.
(https://gitlab.com/styx-lang/styx/-/issues/746).