On Monday, 7 September 2015 at 22:00:07 UTC, bitwise wrote:
Is there any real(and plausible) use case where providing a
template with no argument as a UDA would be useful?
Yes, you actually wrote it yourself!
@MyAttribute!SomeClass class SomeClass { }
That right there is a reason. When you are looking for UDAs, you
look for declarations. The usage code looks like:
foreach(member; getMembers!module)
if(member.hasUDA!(MyAttribute)) {
// do something
}
The beauty of it is that member is right there! So your
reflection code could instantiate it right there:
// do something becomes...
MyAttribute!(member);
so it instantiates the template with the given member in the
reflection code itself.
