@adrianbrink depending on how many args you've defined you can just check is_present for each. But there isn't a way to just wholesale ask if no args at all were defined short of making sure env::args is empty.
Depending on what exactly you're trying to do there may be other ways to do it as well
Also, sorry for the long delay in reply!
@dashed did your question get answered? I apologize I missed it!