I'm very fond of small, specific and simple languages without sacrificing inherent complexity. For me, that includes IP adresses, UUIDs, timestamps, URIs, println formatting, et cetera.
It's a shame though that we don't represent them as such in the current state of affairs but choose to implement them separately in every language. Can we have a fast, universal, feature complete parser generator that is natively supported in our mainstream languages?
For instance, think adding an ANTLR grammar into a .NET project and then be able to just do `var ipAddress = ip"127.0.0.1";` and get full editor support with that.