core.runtime.GC memory alignment

[monarch_dodra]

On Sunday, 27 October 2013 at 20:30:05 UTC, Andrei Alexandrescu 
wrote:
> Yah, something like that. I found align(NNN) underspecified and 
> underpowered for my work with allocators. As a simple matter, 
> NNN must be a literal, not a compile-time expression. You can't 
> even write e.g. align(size_t.alignof), which is fairly basic.
>
>
> Andrei

In that case, we also need to specify how alignOf works. For 
example:

struct S
{
     align(128) int i;
}

static assert(S.alignOf == 128);

If "align(N)" is supposed to only mean "alignement relative to 
the start of the struct", why the heck is S's "alignOf" 128?

Also, (but I can't double check it right now), I seem to remember 
that there are odd things, like "ulong.alignOf == 8", yet if you 
declare one on the stack, you notice it's only 4 aligned (at 
least, on my win32 (I think) it is...)