Giuseppe Castagna (IRIF), Mickaël Laurent (Université de Paris), Kim Nguyen (Université Paris Saclay) and Matthew Lutze (Université de Paris) will present their paper that shows a nifty way to use classic deduction rules to define a formal framework in which dynamic languages such as JavaScript can statically and precisely typed. Check the proof-of-concept implementation available at
https://typecaseunion.github.io/.