Nasty supprise when using c 'anonymous struct and union' in D with 'static struct'

[Arjan]

On Tuesday, 29 December 2020 at 14:42:07 UTC, Steven 
Schveighoffer wrote:
> On 12/29/20 7:38 AM, Arjan wrote:
>> see https://en.cppreference.com/w/c/language/struct
>> 
> I added in some printouts of the addresses of the variables.
>
> It appears that if you add static to the struct, it now becomes 
> a static member of the union, which means it's not an instance 
> variable, and is now a thread-local variable. Its address 
> doesn't even coincide remotely with the address of v1.
>
> What is the equivalent behavior for C that you are expecting? 
> The usage of "static struct" doesn't appear in that page you 
> linked to.

On the C/C++ side there is no static. I added those on the D side 
to to make sure there is no context pointer being added, since 
that will change the layout and size of struct. (in the c/c++ 
code those unions and structs are nested several levels deep)

Based on this: https://dlang.org/spec/struct.html#nested
I expected to have the equivalent of C behavior in D by using the 
static keyword, which in this case just caused havoc. So the 
other way around.