No. Did you look at the patent? "Optional chaining" is not one of the patent's claims. The patent is about building a compiler out of 2 modular front-ends – e

No. Did you look at the patent? "Optional chaining" is not one of the patent's claims. The patent is about building a compiler out of 2 modular front-ends – each taking an input language (one being an OO language based on C), generating the appropriate IR, and handing the IR to a backend. It goes on to specify that one of the integrated frontends does more compile-time safety checking, calling out bounds-checking and optionals, and the other doesn't (because it is specifically based on C).