On Monday, 28 September 2020 at 14:23:12 UTC, Ruby The Roobster
wrote:
On Monday, 28 September 2020 at 14:22:34 UTC, Ruby The Roobster
wrote:
I meant User Defined types. not UDAs. Anyways, the whole thing
is me trying to find a hacky workaround that allows something
similar to multiple alias this declarations(because multiple
of these are not possible). And for this, I have to determine
if a normal number is being passed, or if an user defined type
is being passed through the parameter.
I mean type, not number
There's the `parent` trait. You can wrap it like this:
```
import std;
class Foo {
int x;
}
struct Bar {
Foo f;
}
Foo g;
enum hasParent(alias sym) = is(__traits(parent, sym) == class) ||
is(__traits(parent, sym) == struct);
void main() {
writeln(hasParent!(Bar.f)); // true
writeln(hasParent!(g));
}
```
