If your language has a pattern grammar where one subset of numeric literals is valid as a pattern and another isn't, your parser is simply broken. There's no question of prioritizing this or "real-world" use cases. It's a basic issue of does this work like any reasonable programmer would expect. The response there is nothing more than "you're holding it wrong"[0].

[0]:https://www.urbandictionary.com/define.php?term=You%27re%20H...