How come doing a `foreach` on `.tupleof` causes `
__traits(getAttributes` to return nothing? Is it because it
creates a new 'symbol'? Is this a bug?
```d
struct y{
int z;
}
struct X{
@y(z: 10) string x;
}
void main(){
X a;
foreach(b; a.tupleof){
pragma(msg, __traits(getAttributes, b)); //AliasSeq!()
}
}
```
Changing it to a `static foreach` prints `AliasSeq!(y(10))` as
expected, but now I can't use `b` in runtime code. Obviously
there's a workaround, but it's ugly. I'd much prefer if the above
code worked rather than having to do this:
```d
static foreach(i; 0..a.tupleof.length){
pragma(msg, __traits(getAttributes, a.tupleof[i]));
//AliasSeq!(y(10))
}
```
