https://issues.dlang.org/show_bug.cgi?id=13361
--- Comment #2 from Orvid King <[email protected]> --- A zero length tuple at least means something, but an explicitly empty UDA should be a syntax error. I believe that the only times it's possible for @() to actually be in the code is accidental, and so the compiler should be helpful in this case. @args should continue to be valid, and only @() should produce an error. --
