On 12/29/20 7:38 AM, Arjan wrote:
see https://en.cppreference.com/w/c/language/struct
It seems the 'static' must NOT be used here to get the equivalent
behavior of c, when left in the assertions will fail.
Is this expected?
```
unittest
{
struct W
{
align(1):
long k;
long l;
}
struct V
{
align(1):
union // anonymous union
{
/*static*/ struct // anonymous structure
{
long i;
long j;
}
W w;
}
int m;
}
V v1;
v1.i = 2;
assert( 2 == v1.w.k );
v1.w.l = 5;
assert( 5 == v1.j );
}
```
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.
-Steve
