Is there a way to tell D to rearrange struct members or to not rearrange class members?

[Dejan Lekic]

On Friday, 27 June 2025 at 11:23:56 UTC, WraithGlade wrote:
> I've read both of the available printed D books in their 
> entirety (Ali's and Andrei's) and I noticed Andrei's book 
> (circa ~2010) mentions that the D compiler rearranges the 
> members of `class` objects to be more optimal by reducing 
> alignment-induced padding whereas it leaves the 
> alignment-induced padding of `struct` objects exactly the same 
> as implied and required by the order in which you've written 
> the members of the struct.

Lots of things changed since Andrei's book.
I am guessing what you meant is - is there a way to control 
struct alignment, right?

The answer is yes - D has a nice way of controlling the 
alignment. - Here is a relevant section that explains it in fine 
details: https://dlang.org/spec/attribute.html#align